5.4.0.0: use ghc 9.6.2 (#791)

* Add 9.6 compat

* compile with GHC9.6.2: dependencies, imports, code

* refactor typeclasses

* refactor record dot

* update cabal version

* update github actions

* update direct-sqlcipher

* 5.4.0.0

* update cabal.project

---------

Co-authored-by: Evgeny Poberezkin <2769109+epoberezkin@users.noreply.github.com>

.github/CODEOWNERS

@@ -1 +1,4 @@
-* @epoberezkin @efim-poberezkin
+* @epoberezkin @spaced4ndy
+/Dockerfile @shumvgolove
+/scripts/docker/ @shumvgolove
+/scripts/main/ @shumvgolove

.github/workflows/build.yml

@@ -17,17 +17,19 @@ jobs:
       fail-fast: false
       matrix:
         include:
-          - os: ubuntu-18.04
           - os: ubuntu-20.04
+            platform_name: 20_04-x86-64
+          - os: ubuntu-22.04
+            platform_name: 22_04-x86-64
     steps:
       - name: Clone project
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
 
       - name: Setup Haskell
-        uses: haskell/actions/setup@v1
+        uses: haskell-actions/setup@v2
         with:
-          ghc-version: "8.10.7"
-          cabal-version: "latest"
+          ghc-version: "9.6.2"
+          cabal-version: "3.10.1.0"
 
       - name: Cache dependencies
         uses: actions/cache@v2
@@ -42,19 +44,18 @@ jobs:
         run: cabal build --enable-tests
 
       - name: Test
-        if: matrix.os == 'ubuntu-18.04'
         timeout-minutes: 30
         shell: bash
         run: cabal test --test-show-details=direct
 
       - name: Prepare binaries
-        if: startsWith(github.ref, 'refs/tags/v') && matrix.os == 'ubuntu-20.04'
+        if: startsWith(github.ref, 'refs/tags/v')
         shell: bash
         run: |
-          mv $(cabal list-bin smp-server) smp-server-ubuntu-20_04-x86-64
-          mv $(cabal list-bin ntf-server) ntf-server-ubuntu-20_04-x86-64
-          mv $(cabal list-bin xftp-server) xftp-server-ubuntu-20_04-x86-64
-          mv $(cabal list-bin xftp) xftp-ubuntu-20_04-x86-64
+          mv $(cabal list-bin smp-server) smp-server-ubuntu-${{ matrix.platform_name}}
+          mv $(cabal list-bin ntf-server) ntf-server-ubuntu-${{ matrix.platform_name}}
+          mv $(cabal list-bin xftp-server) xftp-server-ubuntu-${{ matrix.platform_name}}
+          mv $(cabal list-bin xftp) xftp-ubuntu-${{ matrix.platform_name}}
 
       - name: Build changelog
         if: startsWith(github.ref, 'refs/tags/v') && matrix.os == 'ubuntu-20.04'
@@ -80,10 +81,10 @@ jobs:
           prerelease: true
           files: |
             LICENSE
-            smp-server-ubuntu-20_04-x86-64
-            ntf-server-ubuntu-20_04-x86-64
-            xftp-server-ubuntu-20_04-x86-64
-            xftp-ubuntu-20_04-x86-64
+            smp-server-ubuntu-${{ matrix.platform_name}}
+            ntf-server-ubuntu-${{ matrix.platform_name}}
+            xftp-server-ubuntu-${{ matrix.platform_name}}
+            xftp-ubuntu-${{ matrix.platform_name}}
           fail_on_unmatched_files: true
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/docker-image.yml

@@ -0,0 +1,50 @@
+name: Build and push Docker image to Docker Hub
+
+on:
+  push:
+    tags:
+      - "v*"
+
+jobs:
+  build-and-push:
+    name: Build and push Docker image
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - app: smp-server
+            app_port: 5223
+          - app: xftp-server
+            app_port: 443 
+    steps:
+      - name: Clone project
+        uses: actions/checkout@v3
+
+      - name: Log in to Docker Hub
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_PASSWORD }}
+
+      - name: Extract metadata for Docker image
+        id: meta
+        uses: docker/metadata-action@v4
+        with:
+          images: ${{ secrets.DOCKERHUB_USERNAME }}/${{ matrix.app }}
+          flavor: |
+            latest=auto
+          tags: |
+            type=semver,pattern=v{{version}}
+            type=semver,pattern=v{{major}}.{{minor}}
+            type=semver,pattern=v{{major}}
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v4
+        with:
+          push: true
+          build-args: |
+            APP=${{ matrix.app }}
+            APP_PORT=${{ matrix.app_port }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}

.gitignore

@@ -7,3 +7,7 @@ dist-newstyle/
 
 cabal.project.local
 cabal.project.local~
+
+.hpc/
+*.tix
+.coverage

CHANGELOG.md

@@ -1,3 +1,70 @@
+# 5.3.0
+
+Agent:
+- improve performance, track slow database queries.
+- support delievery receipts.
+
+SMP server:
+- control port
+
+# 5.2.0 (NTF server 1.5.0)
+
+Agent:
+- treat agent INACTIVE error as temporary - fixes failed message delivery in some race conditions.
+- restore connection confirmations after client restart - fixes failed connections.
+- ratchet resynchronization protocol and API.
+- increase connection version to mutually supported by both peers on each received message.
+
+Client:
+- make timeout for batched functions dependent on the number of batches - fixes expiry on large batches.
+
+Servers:
+- add timeout in case of sending TCP traffic and in case of partial delivery of requested blocks to avoid resource leaks.
+
+# 5.1.2, 5.1.3 (NTF server 1.4.1, 1.4.2)
+
+Agent:
+- ACK message on decryption error (fixes stuck message delivery bug)
+- more robust connection switching logic, API to abort switching the address
+
+Notification server:
+- batch subscriptions to SMP servers
+
+# 5.1.1 (NTF server 1.4.0)
+
+Agent:
+- store and check hashes of previous encrypted messages to differentiate between duplicates and decryption errors
+
+Server:
+- larger processing queues
+- expire messages when restoring them
+
+# 5.1.0
+
+XFTP client:
+- check encrypted file exists when uploading
+- remove user ID from deletion API
+
+Agent:
+- vacuum database on migrations
+
+SMP server:
+- configure message expiration time in INI file
+
+# 5.0.0
+
+SimpleX File Transfer Protocol (XFTP):
+- XFTP server
+- XFTP CLI
+- support XFTP in the agent
+
+Other changes:
+- preserve retry interval for sending messages on agent restarts
+- support IPv6 in the servers and in the agent
+- support for 32-bit platforms
+
+Read more about XFTP in this post: https://simplex.chat/blog/20230301-simplex-file-transfer-protocol.html
+
 # 4.4.1
 
 SMP agent:

Dockerfile

@@ -0,0 +1,62 @@
+ARG TAG=22.04
+
+FROM ubuntu:${TAG} AS build
+
+### Build stage
+
+# Install curl and git and simplexmq dependencies
+RUN apt-get update && apt-get install -y curl git build-essential libgmp3-dev zlib1g-dev llvm-12 llvm-12-dev libnuma-dev
+
+# Specify bootstrap Haskell versions
+ENV BOOTSTRAP_HASKELL_GHC_VERSION=8.10.7
+ENV BOOTSTRAP_HASKELL_CABAL_VERSION=3.6.2.0
+
+# Install ghcup
+RUN curl --proto '=https' --tlsv1.2 -sSf https://get-ghcup.haskell.org | BOOTSTRAP_HASKELL_NONINTERACTIVE=1 sh
+
+# Adjust PATH
+ENV PATH="/root/.cabal/bin:/root/.ghcup/bin:$PATH"
+
+# Set both as default
+RUN ghcup set ghc "${BOOTSTRAP_HASKELL_GHC_VERSION}" && \
+    ghcup set cabal
+
+COPY . /project
+WORKDIR /project
+
+ARG APP
+ARG APP_PORT
+RUN if [ -z "$APP" ] || [ -z "$APP_PORT" ]; then printf "Please spcify \$APP and \$APP_PORT build-arg.\n"; exit 1; fi
+
+# Compile app
+RUN cabal update
+RUN cabal build exe:$APP
+
+# Create new path containing all files needed
+RUN mkdir /final
+WORKDIR /final
+
+# Strip the binary from debug symbols to reduce size
+RUN bin=$(find /project/dist-newstyle -name "$APP" -type f -executable) && \
+    mv "$bin" ./ && \
+    strip ./"$APP" &&\
+    mv /project/scripts/docker/entrypoint-"$APP" ./entrypoint
+
+### Final stage
+FROM ubuntu:${TAG}
+
+# Install OpenSSL dependency
+RUN apt-get update && apt-get install -y openssl libnuma-dev
+
+# Copy compiled app from build stage
+COPY --from=build /final /usr/local/bin/
+
+# Open app listening port
+ARG APP_PORT
+EXPOSE $APP_PORT
+
+# simplexmq requires using SIGINT to correctly preserve undelivered messages and restore them on restart
+STOPSIGNAL SIGINT
+
+# Finally, execute helper script
+ENTRYPOINT [ "/usr/local/bin/entrypoint" ]

README.md

@@ -90,11 +90,11 @@ You can either run your own SMP server locally or deploy using [Linode StackScri
 
 It's the easiest to try SMP agent via a prototype [simplex-chat](https://github.com/simplex-chat/simplex-chat) terminal UI.
 
-## Deploy SMP server on Linux
+## Deploy SMP/XFTP servers on Linux
 
-You can run your SMP server as a Linux process, optionally using a service manager for booting and restarts.
+You can run your SMP/XFTP server as a Linux process, optionally using a service manager for booting and restarts.
 
-Notice that `smp-server` requires `openssl` as run-time dependency (it is used to generate server certificates during initialization). Install it with your packet manager:
+Notice that `smp-server` and `xftp-server` requires `openssl` as run-time dependency (it is used to generate server certificates during initialization). Install it with your packet manager:
 
 ```sh
 # For Ubuntu
@@ -105,28 +105,53 @@ apt update && apt install openssl
 
 #### Using Docker
 
-On Linux, you can deploy smp server using Docker. This will download image from [Docker Hub](https://hub.docker.com/r/simplexchat/simplexmq).
+On Linux, you can deploy smp and xftp server using Docker. This will download image from [Docker Hub](https://hub.docker.com/r/simplexchat).
 
-1. Create `config` and `logs` directories:
+1. Create directories for persistent Docker configuration:
 
    ```sh
-   mkdir -p ~/simplex/{config,logs}
+   mkdir -p $HOME/simplex/{xftp,smp}/{config,logs} && mkdir -p $HOME/simplex/xftp/files
    ```
 
-2. Run your Docker container. You must change **your_ip_or_domain**. `-e pass="password"` is optional variable to password-protect your `smp` server:
-   ```sh
-   docker run -d \
-       -e addr="your_ip_or_domain" \
-       -e pass="password" \
-       -p 5223:5223 \
-       -v $HOME/simplex/config:/etc/opt/simplex:z \
-       -v $HOME/simplex/logs:/var/opt/simplex:z \
-       simplexchat/simplexmq
-   ```
+2. Run your Docker container.
 
-#### Ubuntu
+   - `smp-server`
+   
+     You must change **your_ip_or_domain**. `-e "pass=password"` is optional variable to password-protect your `smp` server:
+     ```sh
+     docker run -d \
+         -e "ADDR=your_ip_or_domain" \
+         -e "PASS=password" \
+         -p 5223:5223 \
+         -v $HOME/simplex/smp/config:/etc/opt/simplex:z \
+         -v $HOME/simplex/smp/logs:/var/opt/simplex:z \
+         simplexchat/smp-server:latest
+     ```
 
-For Ubuntu you can download a binary from [the latest release](https://github.com/simplex-chat/simplexmq/releases).
+   - `xftp-server`
+   
+     You must change **your_ip_or_domain** and **maximum_storage**.
+     ```sh
+     docker run -d \
+         -e "ADDR=your_ip_or_domain" \
+         -e "QUOTA=maximum_storage" \
+         -p 443:443 \
+         -v $HOME/simplex/xftp/config:/etc/opt/simplex-xftp:z \
+         -v $HOME/simplex/xftp/logs:/var/opt/simplex-xftp:z \
+         -v $HOME/simplex/xftp/files:/srv/xftp:z \
+         simplexchat/xftp-server:latest
+     ```
+
+#### Using installation script
+
+**Please note** that currently, only Ubuntu distribution is supported.
+
+You can install and setup servers automatically using our script:
+
+```sh
+curl --proto '=https' --tlsv1.2 -sSf https://raw.githubusercontent.com/simplex-chat/simplexmq/stable/install.sh -o simplex-server-install.sh \
+&& if echo 'b8cf2be103f21f9461d9a500bcd3db06ab7d01d68871b07f4bd245195cbead1d simplex-server-install.sh' | sha256sum -c; then chmod +x ./simplex-server-install.sh && ./simplex-server-install.sh; rm ./simplex-server-install.sh; else echo "SHA-256 checksum is incorrect!" && rm ./simplex-server-install.sh; fi
+```
 
 ### Build from source
 
@@ -136,31 +161,50 @@ For Ubuntu you can download a binary from [the latest release](https://github.co
 
 On Linux, you can build smp server using Docker.
 
-1. Build your `smp-server` image:
+1. Build your images:
 
    ```sh
    git clone https://github.com/simplex-chat/simplexmq
    cd simplexmq
    git checkout stable
-   DOCKER_BUILDKIT=1 docker build -t smp-server -f ./build.Dockerfile .
+   DOCKER_BUILDKIT=1 docker build -t local/smp-server --build-arg APP="smp-server" --build-arg APP_PORT="5223" . # For xmp-server
+   DOCKER_BUILDKIT=1 docker build -t local/xftp-server --build-arg APP="xftp-server" --build-arg APP_PORT="443" . # For xftp-server
    ```
 
-2. Create `config` and `logs` directories:
+2. Create directories for persistent Docker configuration:
 
    ```sh
-   mkdir -p ~/simplex/{config,logs}
+   mkdir -p $HOME/simplex/{xftp,smp}/{config,logs} && mkdir -p $HOME/simplex/xftp/files
    ```
 
-3. Run your Docker container. You must change **your_ip_or_domain**. `-e pass="password"` is optional variable to password-protect your `smp` server::
-   ```sh
-   docker run -d \
-       -e addr="your_ip_or_domain" \
-       -e pass="password" \
-       -p 5223:5223 \
-       -v $HOME/simplex/config:/etc/opt/simplex:z \
-       -v $HOME/simplex/logs:/var/opt/simplex:z \
-       smp-server
-   ```
+3. Run your Docker container.
+
+   - `smp-server`
+   
+     You must change **your_ip_or_domain**. `-e "pass=password"` is optional variable to password-protect your `smp` server:
+     ```sh
+     docker run -d \
+         -e "ADDR=your_ip_or_domain" \
+         -e "PASS=password" \
+         -p 5223:5223 \
+         -v $HOME/simplex/smp/config:/etc/opt/simplex:z \
+         -v $HOME/simplex/smp/logs:/var/opt/simplex:z \
+         simplexchat/smp-server:latest
+     ```
+
+   - `xftp-server`
+   
+     You must change **your_ip_or_domain** and **maximum_storage**.
+     ```sh
+     docker run -d \
+         -e "ADDR=your_ip_or_domain" \
+         -e "QUOTA=maximum_storage" \
+         -p 443:443 \
+         -v $HOME/simplex/xftp/config:/etc/opt/simplex-xftp:z \
+         -v $HOME/simplex/xftp/logs:/var/opt/simplex-xftp:z \
+         -v $HOME/simplex/xftp/files:/srv/xftp:z \
+         simplexchat/xftp-server:latest
+     ```
 
 #### Using your distribution
 

apps/smp-agent/Main.hs

@@ -1,5 +1,4 @@
 {-# LANGUAGE DuplicateRecordFields #-}
-{-# LANGUAGE NumericUnderscores #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE TypeApplications #-}
 
@@ -10,17 +9,25 @@ import qualified Data.List.NonEmpty as L
 import qualified Data.Map.Strict as M
 import Simplex.Messaging.Agent.Env.SQLite
 import Simplex.Messaging.Agent.Server (runSMPAgent)
+import Simplex.Messaging.Agent.Store.SQLite (MigrationConfirmation (..))
 import Simplex.Messaging.Client (defaultNetworkConfig)
 import Simplex.Messaging.Transport (TLS, Transport (..))
 
 cfg :: AgentConfig
 cfg = defaultAgentConfig
 
+agentDbFile :: String
+agentDbFile = "smp-agent.db"
+
+agentDbKey :: String
+agentDbKey = ""
+
 servers :: InitialAgentServers
 servers =
   InitialAgentServers
     { smp = M.fromList [(1, L.fromList ["smp://bU0K-bRg24xWW__lS0umO1Zdw_SXqpJNtm1_RrPLViE=@localhost:5223"])],
       ntf = [],
+      xftp = M.empty,
       netCfg = defaultNetworkConfig
     }
 
@@ -31,4 +38,5 @@ main :: IO ()
 main = do
   putStrLn $ "SMP agent listening on port " ++ tcpPort (cfg :: AgentConfig)
   setLogLevel LogInfo -- LogError
-  withGlobalLogging logCfg $ runSMPAgent (transport @TLS) cfg servers
+  Right st <- createAgentStore agentDbFile agentDbKey MCConsole
+  withGlobalLogging logCfg $ runSMPAgent (transport @TLS) cfg servers st

build.Dockerfile

@@ -1,51 +0,0 @@
-FROM ubuntu:focal AS final
-FROM ubuntu:focal AS build
-
-### Build stage
-
-# Install curl and git and smp-related dependencies
-RUN apt-get update && apt-get install -y curl git build-essential libgmp3-dev zlib1g-dev
-
-# Install ghcup
-RUN curl https://downloads.haskell.org/~ghcup/x86_64-linux-ghcup -o /usr/bin/ghcup && \
-    chmod +x /usr/bin/ghcup
-
-# Install ghc
-RUN ghcup install ghc 8.10.7
-# Install cabal
-RUN ghcup install cabal
-# Set both as default
-RUN ghcup set ghc 8.10.7 && \
-    ghcup set cabal
-
-COPY . /project
-WORKDIR /project
-
-# Adjust PATH
-ENV PATH="/root/.cabal/bin:/root/.ghcup/bin:$PATH"
-
-# Compile smp-server
-RUN cabal update
-RUN cabal install
-
-### Final stage
-
-FROM final
-
-# Install OpenSSL dependency
-RUN apt-get update && apt-get install -y openssl
-
-# Copy compiled smp-server from build stage
-COPY --from=build /root/.cabal/bin/smp-server /usr/bin/smp-server
-
-# Copy our helper script
-COPY ./scripts/docker/entrypoint /usr/bin/entrypoint
-
-# Open smp-server listening port
-EXPOSE 5223
-
-# SimpleX requires using SIGINT to correctly preserve undelivered messages and restore them on restart
-STOPSIGNAL SIGINT
-
-# Finally, execute helper script
-ENTRYPOINT [ "/usr/bin/entrypoint" ]

cabal.project

@@ -1,11 +1,15 @@
 packages: .
 -- packages: . ../direct-sqlcipher ../sqlcipher-simple
 -- packages: . ../hs-socks
+-- packages: . ../http2
+-- packages: . ../network-transport
+
+with-compiler: ghc-9.6.2
 
 source-repository-package
     type: git
     location: https://github.com/simplex-chat/aeson.git
-    tag: 3eb66f9a68f103b5f1489382aad89f5712a64db7
+    tag: 68330dce8208173c6acf5f62b23acb500ab5d873
 
 source-repository-package
     type: git
@@ -15,14 +19,19 @@ source-repository-package
 source-repository-package
     type: git
     location: https://github.com/kazu-yamamoto/http2.git
-    tag: aa56ded3494dd4f0efb0bbcb5378879ce785a647
+    tag: b5a1b7200cf5bc7044af34ba325284271f6dff25
 
 source-repository-package
     type: git
     location: https://github.com/simplex-chat/direct-sqlcipher.git
-    tag: 34309410eb2069b029b8fc1872deb1e0db123294
+    tag: f814ee68b16a9447fbb467ccc8f29bdd3546bfd9
 
 source-repository-package
     type: git
     location: https://github.com/simplex-chat/sqlcipher-simple.git
-    tag: 5e154a2aeccc33ead6c243ec07195ab673137221
+    tag: a46bd361a19376c5211f1058908fc0ae6bf42446
+
+source-repository-package
+    type: git
+    location: https://github.com/simplex-chat/network-transport.git
+    tag: 0013798272a683e35ca38d2fdaf480942311fba8

download.Dockerfile

@@ -1,20 +0,0 @@
-FROM ubuntu:focal
-
-# Install curl
-RUN apt-get update && apt-get install -y curl
-
-# Download latest smp-server release and assign executable permission
-RUN curl -L https://github.com/simplex-chat/simplexmq/releases/latest/download/smp-server-ubuntu-20_04-x86-64 -o /usr/bin/smp-server && \
-	chmod +x /usr/bin/smp-server
-
-# Copy our helper script
-COPY ./scripts/docker/entrypoint /usr/bin/entrypoint
-
-# Open smp-server listening port
-EXPOSE 5223
-
-# SimpleX requires using SIGINT to correctly preserve undelivered messages and restore them on restart
-STOPSIGNAL SIGINT
-
-# Finally, execute helper script
-ENTRYPOINT [ "/usr/bin/entrypoint" ]

install.sh

@@ -0,0 +1,144 @@
+#!/usr/bin/env sh
+set -eu
+
+# Links to scripts/configs
+bin="https://github.com/simplex-chat/simplexmq/releases/latest/download"
+bin_smp="$bin/smp-server-ubuntu-20_04-x86-64"
+bin_xftp="$bin/xftp-server-ubuntu-20_04-x86-64"
+
+scripts="https://raw.githubusercontent.com/simplex-chat/simplexmq/stable/scripts/main"
+scripts_systemd_smp="$scripts/smp-server.service"
+scripts_systemd_xftp="$scripts/xftp-server.service"
+scripts_update="$scripts/simplex-servers-update"
+scripts_uninstall="$scripts/simplex-servers-uninstall"
+scripts_stopscript="$scripts/simplex-servers-stopscript"
+
+# Default installation paths
+path_bin="/usr/local/bin"
+path_bin_smp="$path_bin/smp-server"
+path_bin_xftp="$path_bin/xftp-server"
+path_bin_update="$path_bin/simplex-servers-update"
+path_bin_uninstall="$path_bin/simplex-servers-uninstall"
+path_bin_stopscript="$path_bin/simplex-servers-stopscript"
+
+path_conf_etc="/etc/opt"
+path_conf_var="/var/opt"
+path_conf_smp="$path_conf_etc/simplex $path_conf_var/simplex"
+path_conf_xftp="$path_conf_etc/simplex-xftp $path_conf_var/simplex-xftp /srv/xftp"
+
+path_systemd="/etc/systemd/system"
+path_systemd_smp="$path_systemd/smp-server.service"
+path_systemd_xftp="$path_systemd/xftp-server.service"
+
+# Defaut users
+user_smp="smp"
+user_xftp="xftp"
+
+GRN='\033[0;32m'
+BLU='\033[1;34m'
+YLW='\033[1;33m'
+RED='\033[0;31m'
+NC='\033[0m'
+
+logo='
+ ____  _                 _     __  __
+/ ___|(_)_ __ ___  _ __ | | ___\ \/ /
+\___ \| | '"'"'_ ` _ \| '"'"'_ \| |/ _ \\  / 
+ ___) | | | | | | | |_) | |  __//  \ 
+|____/|_|_| |_| |_| .__/|_|\___/_/\_\
+                  |_|                            
+'
+
+welcome="Welcome to SMP/XFTP installation script! Here's what we're going to do:
+${GRN}1.${NC} Install latest binaries from GitHub releases:
+    - smp: ${YLW}${path_bin_smp}${NC}
+    - xftp: ${YLW}${path_bin_xftp}${NC}
+${GRN}2.${NC} Create server directories:
+    - smp: ${YLW}${path_conf_smp}${NC}
+    - xftp: ${YLW}${path_conf_xftp}${NC}
+${GRN}3.${NC} Setup user for each server:
+    - xmp: ${YLW}${user_smp}${NC}
+    - xftp: ${YLW}${user_xftp}${NC}
+${GRN}4.${NC} Create systemd services:
+    - smp: ${YLW}${path_systemd_smp}${NC}
+    - xftp: ${YLW}${path_systemd_xftp}${NC}
+${GRN}5.${NC} Install stopscript (systemd), update and uninstallation script:
+    - all: ${YLW}${path_bin_update}${NC}, ${YLW}${path_bin_uninstall}${NC}, ${YLW}${path_bin_stopscript}${NC}
+
+Press ${GRN}ENTER${NC} to continue or ${RED}Ctrl+C${NC} to cancel installation"
+
+end="Installtion is complete!
+
+Please checkout our server guides:
+- smp: ${GRN}https://simplex.chat/docs/server.html${NC}
+- xftp: ${GRN}https://simplex.chat/docs/xftp-server.html${NC}
+
+To uninstall with full clean-up, simply run: ${YLW}sudo /usr/local/bin/simplex-servers-uninstall${NC}
+"
+
+setup_bins() {
+ curl --proto '=https' --tlsv1.2 -sSf -L "$bin_smp" -o "$path_bin_smp" && chmod +x "$path_bin_smp"
+ curl --proto '=https' --tlsv1.2 -sSf -L "$bin_xftp" -o "$path_bin_xftp" && chmod +x "$path_bin_xftp"
+}
+
+setup_users() {
+ useradd -M "$user_smp" 2> /dev/null || true
+ useradd -M "$user_xftp" 2> /dev/null || true
+}
+
+setup_dirs() {
+ # Unquoted varibles, so field splitting can occur
+ mkdir -p $path_conf_smp
+ chown "$user_smp":"$user_smp" $path_conf_smp
+ mkdir -p $path_conf_xftp
+ chown "$user_xftp":"$user_xftp" $path_conf_xftp
+}
+
+setup_systemd() {
+ curl --proto '=https' --tlsv1.2 -sSf -L "$scripts_systemd_smp" -o "$path_systemd_smp"
+ curl --proto '=https' --tlsv1.2 -sSf -L "$scripts_systemd_xftp" -o "$path_systemd_xftp"
+}
+
+setup_scripts() {
+ curl --proto '=https' --tlsv1.2 -sSf -L "$scripts_update" -o "$path_bin_update" && chmod +x "$path_bin_update"
+ curl --proto '=https' --tlsv1.2 -sSf -L "$scripts_uninstall" -o "$path_bin_uninstall" && chmod +x "$path_bin_uninstall"
+ curl --proto '=https' --tlsv1.2 -sSf -L "$scripts_stopscript" -o "$path_bin_stopscript" && chmod +x "$path_bin_stopscript"
+ }
+
+checks() {
+ if [ "$(id -u)" -ne 0 ]; then
+  printf "This script is intended to be run with root privileges. Please re-run script using sudo."
+  exit 1
+ fi
+}
+
+main() {
+ checks
+ 
+ printf "%b\n%b\n" "${BLU}$logo${NC}" "$welcome"
+ read ans
+
+ printf "Installing binaries..."
+ setup_bins
+ printf "${GRN} Done!${NC}\n"
+
+ printf "Creating users..."
+ setup_users
+ printf "${GRN} Done!${NC}\n"
+ 
+ printf "Creating directories..."
+ setup_dirs
+ printf "${GRN} Done!${NC}\n"
+
+ printf "Creating systemd services..."
+ setup_systemd
+ printf "${GRN} Done!${NC}\n"
+
+ printf "Installing stopscript, update and uninstallation script..."
+ setup_scripts
+ printf "${GRN} Done!${NC}\n"
+
+ printf "%b" "$end"
+}
+
+main

package.yaml

@@ -1,5 +1,5 @@
 name: simplexmq
-version: 5.0.0
+version: 5.4.0.0
 synopsis: SimpleXMQ message broker
 description: |
   This package includes <./docs/Simplex-Messaging-Server.html server>,
@@ -22,7 +22,7 @@ extra-source-files:
   - CHANGELOG.md
 
 dependencies:
-  - aeson == 2.0.*
+  - aeson == 2.2.*
   - ansi-terminal >= 0.10 && < 0.12
   - asn1-encoding == 0.9.*
   - asn1-types == 0.3.*
@@ -30,26 +30,27 @@ dependencies:
   - attoparsec == 0.14.*
   - base >= 4.14 && < 5
   - base64-bytestring >= 1.0 && < 1.3
-  - bytestring == 0.10.*
+  - bytestring == 0.11.*
   - case-insensitive == 1.2.*
   - composition == 1.0.*
   - constraints >= 0.12 && < 0.14
   - containers == 0.6.*
-  - cryptonite >= 0.27 && < 0.30
+  - cryptonite == 0.30.*
   - cryptostore == 0.2.*
   - data-default == 0.7.*
   - direct-sqlcipher == 2.3.*
   - directory == 1.3.*
   - filepath == 1.4.*
   - http-types == 0.12.*
-  - http2 == 4.0.*
-  - generic-random >= 1.3 && < 1.5
+  - http2 == 4.1.*
+  - generic-random == 1.5.*
   - ini == 0.4.1
+  - iproute == 1.7.*
   - iso8601-time == 0.1.*
-  - memory == 0.15.*
-  - mtl == 2.2.*
+  - memory == 0.18.*
+  - mtl == 2.3.*
   - network >= 3.1.2.7 && < 3.2
-  - network-transport == 0.5.4
+  - network-transport == 0.5.6
   - optparse-applicative >= 0.15 && < 0.17
   - QuickCheck == 2.14.*
   - process == 1.6.*
@@ -58,14 +59,14 @@ dependencies:
   - socks == 0.6.*
   - sqlcipher-simple == 0.4.*
   - stm == 2.5.*
-  - template-haskell == 2.16.*
+  - template-haskell == 2.20.*
   - temporary == 1.3.*
-  - text == 1.2.*
+  - text == 2.0.*
   - time == 1.9.*
   - time-compat == 1.9.*
   - time-manager == 0.0.*
   - tls >= 1.6.0 && < 1.7
-  - transformers == 0.5.*
+  - transformers == 0.6.*
   - unliftio == 0.2.*
   - unliftio-core == 0.2.*
   - websockets == 0.12.*
@@ -135,8 +136,9 @@ tests:
     main: Test.hs
     dependencies:
       - simplexmq
-      - hspec == 2.7.*
-      - hspec-core == 2.7.*
+      - deepseq == 1.4.*
+      - hspec == 2.11.*
+      - hspec-core == 2.11.*
       - HUnit == 1.6.*
       - QuickCheck == 2.14.*
       - silently == 1.2.*

protocol/simplex-messaging.md

@@ -347,7 +347,7 @@ Simplex messaging server implementations MUST NOT create, store or send to any o
 
 - Snapshots of the database they use to store queues and messages (instead simplex messaging clients must manage redundancy by using more than one simplex messaging server). In-memory persistence is recommended.
 
-- Any other information that may compromise privacy or [forward secrecy][4] of communication between clients using simplex messaging servers.
+- Any other information that may compromise privacy or [forward secrecy][4] of communication between clients using simplex messaging servers (the servers cannot compromise forward secrecy of any application layer protocol, such as double ratchet).
 
 ## Message delivery notifications
 

rfcs/2023-05-03-delivery-receipts.md

@@ -0,0 +1,170 @@
+# Delivery receipts
+
+## Problems
+
+User experience - users need to know that the messages are delivered to the recipient, as this confirms that the system is functioning.
+
+The downside of communicating message delivery as it confirms that the recipient was online, and, unless there is a delay in confirming, can be used to track the location via the variation in network latency. So delivery receipts should be delayed with a randomized interval and should be opt in or opt out.
+
+Another problem of message receipts is that they increase network traffic and server load. This could be avoided if delivery receipts are communicated as part of normal message delivery flow.
+
+Some other existing and planned features implicitely confirm message delivery and, possibly, should depend on message delivery being enabled:
+- agent message to resume delivery when quota was exceeded (implemented, [rfc](./2022-12-27-queue-quota.md))
+- agent message to re-deliver skipped messages or to re-negotiate double ratchet.
+
+## Solution
+
+There are three layers where delivery receipts can be implemented:
+- chat protocol. Pro: logic of when to deliver it is decoupled from the message flow, Con: extra traffic, can only work in duplex connections.
+- agent client protocol. Pro: can be automated and combined with the protocol to re-deliver skipped messages. Con: extra traffic.
+- SMP protocol. Pro: minimal extra traffic, Con: complicates server design as it would require pushing receipts when there is no next message.
+
+The last approach seems the most promising for avoiding additional traffic:
+- modify client ACK command to include whether delivery receipt should be provided to sender, and, possibly, any e2e encrypted data that should be included in the receipt (e.g., that the receiving client already saw this message in case we use "feedback" variant of roumor-mongering protocol for groups).
+- server would manage delaying of the receipts, by randomizing the time after which the receipt will be available to the sender, and by combining the receipts when possible.
+- modify response to SEND command to include any available delivery receipts.
+- add a separate delivery receipt that will be pushed to the sender in the connection where the message was received by the server.
+
+## SMP protocol changes
+
+```haskell
+data Command (p :: Party) where
+  -- ...
+  ACK :: MsgId -> Maybe ByteString -> Command Recipient
+  -- the presense of ByteString in ACK indicates that the delivery needs to be confirmed.
+  -- the protocol does not define the format of this confirmation, it is application specific, and can be -- an empty string.
+  -- And open question is how to e2e encrypt information in this string - this probably can be handled on Agent client protocol level, and could be the same ratchet key that was used to encrypt and decrypt the message. The downside of this approach is that this key currently is not stored, and storing it requires additional logic to clear these keys if unused after some time.
+  -- TODO consider what could be a better approach.
+  SENT :: MsgId -> [(MsgId, UTCTime, ByteString)] -> Command Sender
+  -- or
+  -- SENT :: MsgId -> Command Sender
+  -- in case we just batch
+  -- this response will be sent to SEND command and will include a sender's message ID generated by the server (currently it does not exist), and posibly an empty list of delivery receipts with the same message IDs as in responses to SEND, timestamps when these receipts became available, and e2e encrypted ByteString passed in ACK command.
+  -- The ID in this response should be different from the ID used in MSG, to keep the promise of not having shared identifiers in sent/received traffic even inside TLS tunnel.
+  -- Keeping the quality of shared ciphertext also requires adding additional encryption layer between the server and the sender, this can be achieved in one of two ways:
+  -- 1) passing a separate DH key in each SEND command, and server including additional DH key in each SENT response, with computed DH secret per message later used to encrypt and decrypt the delivery receipt payloads. This is probably a bad idea as it would increase a cryptographic load on both the server and the client.
+  -- 2) agree a key per queue, in the same way it is done for the recipient. Possibly, it requires additional DH key in confirmation message that the recipient then uses to secure the queue, and passing this key in KEY (secure queue) command. The response to this secure command would the include server's DH key returned to the recipient that would be passed to the sender in HELLO message. Even though recipient could observe both public DH keys, they won't know the computed shared secret. Recipient that controls the server could perform MITM attack on this key exchange, but it doesn't give any benefit over what recipient can do when they have access to the server - the threat model remains the same. The downside of this approach is that it also requires additional changes in client protocol level (confirmation message format and HELLO message).
+  -- 3) also agree on a key per queue, but via separate commands between the sender and the server, once the sender was notified that the queue is secured. This approach is probably better, and the server would simply delay the delivery of delivery receipts until the shared secret is agreed.
+  SKEY :: C.PublicKeyX25519 -> Command Sender
+  SBKEY :: C.PublicKeyX25519 -> BrokerMsg
+  -- these are the command and response to agree secret to encrypt delivery receipt payloads for option 3
+  SSUB :: Command Sender
+  -- subscribe to receive delivery receipts for a given queue - will be sent when the conversation is opened (unless there is an active subscription already), not all queues at once, and won't be re-subscribed on losing the server connection (TBC).
+  RCVD :: MsgId -> UTCTime -> ByteString -> Command Recipient
+  -- delivery receipt. UTCTime is the time when it became available, not the time when ACK was sent by the recipient, to avoid leaking location via network latency.
+```
+
+Possibly, there is no need to include delivery receipts into SENT response and instead just use batching of responses that is already supported. As server responses are not signed, there is no per-response overhead that is substantial, and a lot of receipts that are available can be packed into one block (depending on the size of payload that has to be fixed not to leak metadata).
+
+This all seems rather complicated for SMP protocol, and the approach of doing it on a higher level seems more attractive than initially. Possibly we should reconsider, and reduce traffic by reducing block sizes... Reducing block sizes unfortunately requires supporting variable block sizes, and would leak some metadata during the transition period.
+
+## Another approach
+
+Above represents substantial complexity, and at least doubles server code complexity for the feature that is definitely not doubling the value of server software. Moving to variable block size is simpler, but also has a lot of complexity, reduces metadata privacy (at least for the duration of migration period), reduces image preview quality, and requires postponing this feature for multiple releases, until all clients migrate.
+
+Given that the main traffic is generated by the groups, and direct messages do not create a lot of traffic, a much simpler and better solution is to simply send delivery receipts as the message, in direct conversations only, either as chat protocol message or as agent client protocol message (either on the message or on the envelope layer).
+
+### Comparison of these two approaches:
+
+**Chat protocol message**
+
+Pros:
+- simpler, more contained change - SMP layer is not aware of this feature
+- easier to extend protocol with additional application specific payload, e.g. references to group DAG
+Cons:
+- ?
+
+```json
+  // ...
+  "x.msg.delivered": {
+    "properties": {
+      "msgId": {"ref": "base64url"},
+      "params": {
+        "properties": {
+          "msgId": {"ref": "base64url"},
+        },
+        "optionalProperties": {
+          "data": {} // possibly the initial protocol does not need it, with JSON can be added later
+        }
+      }
+    }
+  },
+  // ...
+```
+
+**Agent client protocol envelope**
+
+Pros:
+- possibility of using it in a wider range of the applications
+- possibility to include received message hash to increase communication integrity - the sending client would be then notified, and it can be exposed in the UI, that the received message is not the same as sent.
+
+Cons:
+- additional implementation complexity - requires additional events to communicate between chat and agent.
+
+```haskell
+data AMessage =
+  -- ...
+  | A_RCVD AgentMsgId MsgHash ByteString -- references to the received message
+  -- ...
+```
+
+The weirdness of the above design is that it refers to the data present in the header of another message, the alternative would be to have a separate envelope for delivery receipt:
+
+```haskell
+data AgentMessage =
+  -- ...
+  AgentMessageRcvd APrivHeader AgentMsgId MsgHash ByteString -- references to the received message
+  -- ...
+```
+
+But probably the first one is a bit better, TBC.
+
+In any case there should be an additional event to notify chat client:
+
+```haskell
+data ACommand (p :: AParty) (e :: AEntity) where
+  -- ...
+  RCVD AgentMsgId MsgMeta ByteString -> ACommand Agent AEConn
+  -- ...
+```
+
+On the balance of things, implementing on the level of Agent Client protocol seems better, as the additional complexity is marginal, but it allows for wider range of applications, and also allows for additional delivery integrity validation. The format for payload still requires chat protocol message encoding once we want to add it, but initially it could be just an empty string.
+
+## Implementation plan
+
+Currently, we delete sent messages once delivered to the server. It would be helpful if we could keep the records in snd_messages table, and then use them to process delivery receipts, although it may be insufficient (we could add fields). Probably it is not possible to keep them as there is a foreign key constraint with `on delete cascade`.
+
+The new table will be used to track sent message hashes to correlate their IDs with delivery receipts (that will also be stored in messages/rcv_messages). Receipts need to be processed in chat in the same way as normal messages, so they would be sent to chat with MsgMeta, and the chat will need to ack them once processed.
+
+Agent ackMessage function will be also used to automatically schedule sending delivery receipts if they are enabled for connection, only for normal messages - no sending receipts to receipts.
+
+There can be receipt re-delivery to the chat in the same cases as when normal message can be re-delivered (in case of AGENT A_DUPLICATE when it was not ack'd by the user).
+
+## Other considerations
+
+### How clients decide whether to send delivery receipts
+
+Two options are possible - local settings per conversation or chat preferences framework, that allows to have mutual on/off. The latter seems preferable as without knowing whether the other party is sending receipts, it is not possible to uderstand what the absense of the receipt means - network malfunction or receipts disabled.
+
+Groups are a special case, as while some groups may enable sending the delivery receipts, the group members should be able to disable it locally. This should probably be done via a separate conversation setting in the same way as enabling notifications or favourites. In this case the receipt would only be sent to the group if it is enabled in the group and not disabled by the member. The toggle may be located in the same page as chat preferences, but it should be a separate setting. We might want though to communicate somehow whether a given member sends delivery receipts so that other members know whether to expect them or not.
+
+### How this functionality is released
+
+5.2:
+- support for sending and receiving delivery receipts preference, both in direct messages and in groups (for forward compatibility).
+- support for sending and receiving delivery receipts in direct chats only, but disable sending them
+
+5.3:
+- show receipt preferences in the UI
+- enable sending receipts in direct chats where they are enabled
+
+A separate question is how to enable this functionality for the existing contacts. Possible options are:
+
+1. Enable (as per default) for all contacts, show notification to the user when they open the app for update that delivery notifications are now sent by default to all contacts. Pro: no extra logic to implement. Con: may be perceived as a privacy violation, as to some contacts the delivery receipts will be sent before the user had chance to disable them.
+2. Ask the user when the new version first runs whether they want to use delivery receipts and offer these options:
+  1) keep enabled for all profiles (and for all contacts)
+  2) enable for all profiles in ~12 or in ~24 hours giving users the chance to review all contacts / profiles and disable some of them. The problem here is also in possibility of the correlation in case they all start sending receipts at the same time. Possibly the option could be to set a random time in 12-15 or 24-30 hours range to avoid the possibility of such correlation.
+  3) disable for all profiles – it will require sending profile updates to all contacts, so the delivery receipts should be kept disabled and profile updates should be sent after random intervals, one by one (not scheduled all at once, as the time may pass while the app is off).
+3. Offer an option to enable globally later - we could keep it as a one-off option, available only to existing users, and visible on the top level of the Settings - once enabled, the option will disappear and it won't be possible to disable again. The downside here is that the new contacts would be receiving the profile with enabled notifications but they still won't be delivered...
+4. Another option is to have all new contacts decided based on a global user default (that can be set in the settings and in the dialog on first start), but for the existing contacts keep in unset state that is not interpreted as either on or off, but interpreted as unknown until the user makes a choice... That might be an optimal solution for the users but it would probably require changing the preferences framework or some ad-hoc hacks. That still keeps the question open how to avoid correlation between profiles.
+5. That might be the case for version agreement too - the availability of the option per contact will depend on the version. It doesn't answer the question what to do with global defaults though...

rfcs/2023-06-08-resync-ratchets.md

@@ -0,0 +1,366 @@
+# Re-sync encryption ratchets
+
+## Problem
+
+See https://github.com/simplex-chat/simplexmq/pull/743/files for problem and high-level solution.
+
+## Implementation
+
+### Diagnosing ratchet de-synchronization
+
+Message decryption happens in `agentClientMsg`, in `agentRatchetDecrypt`, which can return decryption result or error. Decryption error can be differentiated in `agentClientMsg` result pattern match, in Left cases, where we already differentiate duplicate error (`AGENT A_DUPLICATE`).
+
+Question: Which decryption errors can be diagnosed as ratchet de-synchronization?
+
+Possibly any `AGENT A_CRYPTO` error. Definitely on `RATCHET_HEADER`, TBC other. See `cryptoError :: C.CryptoError -> AgentErrorType` for conversion from decryption errors to `A_CRYPTO` or other agent errors. We're only interested in crypto errors, as other are either other client implementation errors, internal errors, or already processed duplicate error.
+
+Proposed classification of crypto errors, based on `AgentCryptoError`:
+
+`DECRYPT_AES` -> re-sync allowed (recommended/required?)
+
+`DECRYPT_CB` -> re-sync allowed (recommended/required?)
+
+`RATCHET_HEADER` -> **re-sync required**
+
+`RATCHET_EARLIER` -> re-sync allowed
+
+`RATCHET_SKIPPED` -> **re-sync required**
+
+Ratchet re-synchronization could be started automatically on diagnosing de-synchronization, based on these errors. As a potentially dangerous feature (e.g., implementation error could lead to infinite re-sync loop causing large traffic consumption), initially it will be available via agent functional api for client to call. Ratchet de-synchronization will instead produce an event prompting client to re-synchronize.
+
+Diagnosing possible ratchet de-synchronization also will be recorded as connection state - `ratchet_desync_state` field in `connections` table. Client should be prohibited to start ratchet re-synchronization unless `ratchet_desync_state` is set.
+
+Event should not be repeated for following received messages that can't be decrypted - based on `ratchet_desync_state`. If a received message can be decrypted, `ratchet_desync_state` should be set to NULL and a new event sent, indicating ratchet has healed.
+
+New event - `RDESYNC :: RatchetDesyncState -> ConnectionStats -> ACommand Agent AEConn`
+
+```haskell
+data RatchetDesyncState
+  = RDResyncAllowed
+  | RDResyncRequired
+  | RDHealed
+```
+
+New field should be added to `ConnectionStats` - `ratchetDesyncState :: Maybe RatchetDesyncState`, based on `ratchet_desync_state`.
+
+> On `RDESYNC` events chat should create chat item, prompting ratchet re-synchronization or notifying it has healed.
+> If connection has diagnosed ratchet de-sync, chat item should have a button to start ratchet re-sync.
+> We'd have to get `ConnectionStats` on chat level for this instead of chat info.
+> This wouldn't work for groups. One option is to add `ConnectionStats` to `GroupMember` type and update on events.
+> Same could be done for `Contact` then.
+
+To consider - allow to start ratchet re-synchronization at any time regardless of this field as an experimental feature. In chat it could be behind "Developer tools" + additional "Experimental" toggle. Agent api would have `force :: Bool` as parameter, allowing to bypass `ratchet_desync_state`. Should `ratchet_resync_state` (see below) still be honored in this case?
+
+### Re-synchronization process
+
+\*\*\*\*\*
+
+Basic idea is the following:
+
+Both agents send new ratchet keys and compute a new shared secret. Agent that starts re-synchronization should record this fact in the connection state. Agent that receives a new key should respond with a key of its own, unless it has recorded that it itself started re-synchronization in the connection state.
+
+It can happen that both agents start re-synchronizing simultaneously. In this case they both would record it in the connection state and would not respond with a new message - instead they would use each other's already sent keys.
+
+Agent has both keys if:
+
+- It initiates with the first key, and then receives the second key;
+- It receives the first key and then generates its own in response.
+
+After agent has both keys, it initiates new ratchet depending on keys ordering. The agent that sent the lower key should use `initRcvRatchet` function, the agent that sent the greater key should use `initSndRatchet` (or vice versa - but they should deterministically choose different sides).
+
+\*\*\*\*\*
+
+State whether the ratchet re-synchronization is in progress should be tracked in database via `connections` table new `ratchet_resync_state` field.
+
+New functional api:
+
+```haskell
+resyncConnectionRatchet :: AgentErrorMonad m => AgentClient -> ConnId -> m ConnectionStats
+```
+
+or if we want to allow re-synchronizing ratchet at any time even if de-synchronization wasn't diagnosed:
+
+```haskell
+resyncConnectionRatchet :: AgentErrorMonad m => AgentClient -> ConnId -> Bool -> m ConnectionStats
+resyncConnectionRatchet c connId force = ...
+```
+
+Possibly client command?
+
+``` haskell
+data ACommand (p :: AParty) (e :: AEntity) where
+  ...
+  RESYNC_RATCHET :: Bool -> ACommand Client AEConn
+```
+
+New event - `RRESYNC :: RatchetResyncState -> ConnectionStats -> ACommand Agent AEConn`
+
+```haskell
+data RatchetResyncState
+  = RRStarted
+  | RRAgreedSnd
+  | RRAgreedRcv
+  | RRComplete
+```
+
+New `ConnectionStats` field - `ratchetResyncState :: Maybe RatchetResyncState`.
+
+When called, it should:
+
+- Generate new keys.
+- Update database connection state.
+  - Set `ratchet_desync_state` to NULL.
+  - Set `ratchet_resync_state` to `RRStarted`.
+  - Delete old ratchet from `ratchets` (is it safe?), create new ratchet.
+- Send `AgentRatchetKey` message.
+- Return updated `ConnectionStats` to client.
+
+> On `RRESYNC` events chat should create chat item, and reset connection verification.
+> Parameterized `RRESYNC` allows to distinguish: start and end of re-synchronization for initiating party; chat item direction - `RRESYNC RRStarted` is snd, `RRESYNC RRAgreedSnd/Rcv` and `RRESYNC RRComplete` are rcv (`RRESYNC RRAgreedSnd/Rcv` chat item could be omitted).
+
+AgentRatchetKey is a new message on the level of AgentMsgEnvelope - encrypted with queue level e2e encryption, but not with connection level e2e encryption (since ratchet de-synchronized).
+
+```haskell
+data AgentMsgEnvelope
+  = ...
+  | AgentRatchetKey
+      { agentVersion :: Version,
+        e2eEncryption :: E2ERatchetParams 'C.X448,
+        info :: ByteString -- for extension
+      }
+```
+
+On receiving `AgentRatchetKey`, if the receiving client hasn't started the ratchet re-synchronization itself (check `ratchet_resync_state`), it should:
+
+- Generate new keys and compute new shared secret, initializing ratchet based on keys comparison.
+- Update database connection state.
+  - Set `ratchet_resync_state` to `RRAgreedSnd/Rcv` (depending on whether ratchet was initialized as sending or receiving).
+  - Delete old ratchet from `ratchets`, create new ratchet.
+- Reply with its own `AgentRatchetKey`.
+- Notify client with `RRESYNC RRAgreedSnd/Rcv`.
+- If ratchet was initialized as sending, send `EREADY` message, notifying other agent ratchet is re-synced.
+
+New agent message:
+
+```haskell
+data AMessage
+  = ...
+  | -- ratchet re-synchronization is complete, with last decrypted sender message id
+    EREADY PrevExternalSndId
+```
+
+On receiving `AgentRatchetKey`, if the receiving client started re-sync:
+
+- Compute new shared secret, initializing ratchet based on keys comparison.
+- Update database connection state.
+  - Set `ratchet_resync_state` to `RRAgreedSnd/Rcv` (depending on whether ratchet was initialized as sending or receiving).
+  - Update ratchet.
+- Notify client with `RRESYNC RRAgreedSnd/Rcv`.
+- If ratchet was initialized as sending, send `EREADY` message.
+
+After agent receives `EREADY` (or any other message that successfully decrypts):
+
+- Reset `ratchet_resync_state` to NULL.
+- Notify client with `RRESYNC RRComplete`.
+- If ratchet was initialized as receiving, send reply `EREADY` message.
+
+### State transitions
+
+For initiating party:
+
+```
+    +------------+
+    | Ratchet ok |
+    +------------+
+          |
+          | message received, decryption error
+   * ---->|-----------------------------------+
+          |                                   |
+          V          new (clarifying)         V
+  +-----------------+     error      +------------------+
+  | Re-sync allowed |--------------->| Re-sync required |
+  +-----------------+                +------------------+
+          |                                   |
+          |-----------------------------------|
+          |                                   | alternative - message received,
+          | re-sync started by client         | successfully decrypted
+          V                                   V
+  +-----------------+                   +------------+
+  | Re-sync started |                   | Ratchet ok |
+  +-----------------+                   +------------+
+          |
+          | other party replied with new ratchet key
+          V
+  +----------------+
+  | Re-sync agreed |----> * message received, decryption error
+  |   snd / rcv    |        (should remember agreed state for reply EREADY?)
+  +----------------+
+          |
+          | message received, successfully decrypted
+          | (can be, but not necessarily, EREADY)
+          V
+    +------------+
+    | Ratchet ok |
+    +------------+
+```
+
+For replying party:
+
+```
+    +------------+
+    | Ratchet ok |
+    +------------+
+          |
+          | other party sent new ratchet key
+          V
+  +----------------+
+  | Re-sync agreed |
+  |   snd / rcv    |
+  +----------------+
+          |
+          | message received, successfully decrypted
+          | (can be, but not necessarily, EREADY)
+          V
+    +------------+
+    | Ratchet ok |
+    +------------+
+```
+
+### Ratchet state model
+
+#### 2 state variables
+
+Above we considered model with separate de-sync and re-sync state.
+
+| Desync \ Resync      | Nothing | RRStarted | RRAgreedSnd | RRAgreedRcv |
+| ---                  |  :---:  |   :---:   |    :---:    |    :---:    |
+| **Nothing**          | 1       | 3         | 4           | 4           |
+| **RDResyncAllowed**  | 2       |           | 5           | 5           |
+| **RDResyncRequired** | 2       |           | 5           | 5           |
+
+1: Ratchet is ok.
+
+2: Re-sync diagnosed, not in progress.
+
+3: Rs-sync started, diagnosing de-sync is prohibited.
+
+4: Re-sync agreed.
+
+5: Re-sync agreed, new de-sync is diagnosed.
+
+Combination 5 is possible in case de-sync was diagnosed before message that could be decrypted is received, for example if `EREADY` failed to deliver and no other decryptable message followed. We shouldn't prohibit diagnosing de-sync in this case, because agent may never exit "Agreed" state (if new decryptable message is never received). We also shouldn't overwrite/forget state of re-sync, even if we diagnose new possible de-sync, because if the decryptable `EREADY` is received and ratchet is in `RRAgreedRcv` state, it should respond with reply `EREADY`.
+
+Some combinations should be impossible:
+
+  - `RDResyncAllowed` with `RRStarted`.
+
+  - `RDResyncRequired` with `RRStarted`.
+
+`RDHealed` is equivalent to `Nothing` and only used for `RDESYNC` event, `Maybe RatchetDesyncState` can be replaced with `RatchetDesyncState`, with single new constructor `RDNoDesync` replacing `Nothing` and `RDHealed`.
+
+`RRComplete` is equivalent to `Nothing` and only used for `RRESYNC` event, `Maybe RatchetResyncState` can be replaced with `RatchetResyncState`, with single new constructor `RDNoResync` replacing `Nothing` and `RRComplete`.
+
+#### Single state variable
+
+Another option is two have a single state variable describing ratchet.
+
+```haskell
+data RatchetState
+  = RSOk
+  | RSResyncAllowed
+  | RSResyncRequired
+  | RSResyncStarted
+  | RRResyncAgreedSnd
+  | RRResyncAgreedRcv
+
+-- When `resyncConnectionRatchet` is not prohibited. Can override with `force`.
+-- Currently we check:`(isJust ratchetDesyncState || force) && ratchetResyncState /= Just RRStarted`.
+resyncConnectionRatchetAllowed :: RatchetState -> Bool
+resyncConnectionRatchetAllowed = \case
+  RSOk -> False
+  RSResyncAllowed -> True
+  RSResyncRequired -> True
+  RSResyncStarted -> False -- `force` shouldn't override
+  RRResyncAgreedSnd -> False
+  RRResyncAgreedRcv -> False
+
+-- When we register and notify about ratchet de-synchronization.
+-- Currently we check: `(isNothing ratchetDesyncState && ratchetResyncState /= Just RRStarted)`.
+-- We should also allow to update from Allowed to Required.
+shouldNotifyRDESYNC :: RatchetState -> Bool
+shouldNotifyRDESYNC = \case
+  RSOk -> True
+  RSResyncAllowed -> False -- only if new error implies Required
+  RSResyncRequired -> False
+  RSResyncStarted -> False
+  RRResyncAgreedSnd -> True
+  RRResyncAgreedRcv -> True
+
+-- When we prohibit connection switch, for `checkRatchetDesync`.
+-- Currently we check: `(ratchetDesyncState == Just RDResyncRequired || ratchetResyncState == Just RRStarted)`
+-- Also use in `runSmpQueueMsgDelivery` to pause delivery?
+ratchetDesynced :: RatchetState -> Bool
+ratchetDesynced = \case
+  RSOk -> False
+  RSResyncAllowed -> False
+  RSResyncRequired -> True
+  RSResyncStarted -> True
+  RRResyncAgreedSnd -> False
+  RRResyncAgreedRcv -> False
+```
+
+Having a single state variable limits differentiation described for combination 5 in matrix. It also limits possible differentiations in client between events when ratchet is healed on its own, and when ratchet re-sync is completed after agents negotiation. Overall, since matrix is not very sparse and allows for more fine-grained decision-making, having separate state variables for de-sync and re-sync seems preferred.
+
+#### Single state variable simplified (final version)
+
+```haskell
+data RatchetSyncState
+  = RSOk
+  | RSAllowed
+  | RSRequired
+  | RSStarted
+  | RSAgreed
+
+-- event
+RSYNC :: RatchetSyncState -> ConnectionStats -> ACommand Agent AEConn`
+
+-- ConnectionStats field
+ratchetSyncState :: RatchetSyncState
+```
+
+Updated design decisions:
+
+1. Single constructor for "Agreed" state. Differentiating `RRResyncAgreedSnd` and `RRResyncAgreedRcv` allowed for easier processing of `EREADY` by helping to determine whether reply `EREADY` has to be sent. However, it duplicated information already present in ratchet's state, and can be instead worked around by remembering and analyzing ratchet state pre decryption.
+
+2. Prohibit transition from "Agreed" state to "Desync" states. This would make possible edge-cases that leave ratchet in de-synchronized state without ability to progress (e.g. failed delivery of `AgentRatchetKey`), but would simplify state machine by removing dedicated "Desync" variable. Besides, there's still a recovery way with a `force` option.
+
+3. Treat "Agreed" as unfinished state - prohibit new messages to be enqueued, etc. Reception of any decryptable message transitions ratchet to "Ok" state.
+
+Possible improvements:
+
+- Repeatedly triggering re-synchronization while in "Started"/"Agreed" state re-sends same keys and EREADY.
+- Cooldown period, during which repeat re-synchronization is prohibited.
+
+### Skipped messages
+
+Options:
+
+1. Ignore skipped messages.
+2. Stop sending new messages while connection re-synchronizes (can use `ratchet_resync_state`).
+
+- Initiator shouldn't send new messages until receives `AgentRatchetKey` from second party.
+- Second party knows new shared secret immediately after processing first `AgentRatchetKey`, so it's not necessary to limit?
+
+3. 2 + Re-send skipped messages first.
+
+- Add `last_external_snd_msg_id` to `AgentRatchetKey`? + see link above
+
+4. Re-send only messages after the latest ratchet step. \*
+
+It may be okay to ignore skipped messages, or at most implement option 2, as ratchet de-synchronization is usually caused by misuse (human error) - the most common cause of ratchet de-sync seems to be sending and receiving messages after running agent with old database backup. In this case user has already seen most skipped messages, and it can be expected to not have them after switching to an old backup. So in this case the only "really skipped" messages are those that were sent during the latest ratchet step and failed to decrypt, triggering ratchet re-sync (\* another option is to only re-send those).
+
+Besides, depending on time of backup there may be an arbitrary large number of skipped messages, which may consume a lot of traffic and may halt delivery of up-to-date messages for some time.
+
+It may be better to have request for repeat delivery as a separate feature, that can be requested in necessary contexts - for example for group stability.
+
+Can servers delivery failure lead to de-sync? If message is lost on server and never delivered, ratchet wouldn't advance, so there's no room for de-sync? If yes, re-evaluate.

scripts/docker/entrypoint

@@ -1,29 +0,0 @@
-#!/usr/bin/env sh
-confd="/etc/opt/simplex"
-logd="/var/opt/simplex/"
-
-# Check if server has been initialized
-if [ ! -f "$confd/smp-server.ini" ]; then
-  # If not, determine ip or domain
-  case $addr in
-    '') printf "Please specify \$addr environment variable.\n"; exit 1 ;;
-    *[a-zA-Z]*) set -- -n $addr ;;
-    *) set -- --ip $addr ;;
-  esac
-
-  case $pass in
-    '') set -- "$@" --no-password ;;
-    *) set -- "$@" --password $pass ;;
-  esac
-
-  smp-server init -y -l "$@"
-fi
-
-# backup store log
-[ -f "$logd/smp-server-store.log" ] && cp "$logd"/smp-server-store.log "$logd"/smp-server-store.log.bak
-# rotate server log
-[ -f "$logd/smp-server.log" ] && mv "$logd"/smp-server.log "$logd"/smp-server-"$(date +'%FT%T')".log
-
-# Finally, run smp-sever. Notice that "exec" here is important:
-# smp-server replaces our helper script, so that it can catch INT signal
-exec smp-server start > "$logd"/smp-server.log 2>&1

scripts/docker/entrypoint-smp-server

@@ -0,0 +1,48 @@
+#!/usr/bin/env sh
+confd='/etc/opt/simplex'
+logd='/var/opt/simplex/'
+
+# Check if server has been initialized
+if [ ! -f "${confd}/smp-server.ini" ]; then
+  # If not, determine ip or domain
+  case "${ADDR}" in
+    '') printf 'Please specify $ADDR environment variable.\n'; exit 1 ;;
+    *[a-zA-Z]*)
+      case "${ADDR}" in
+        *:*) set -- --ip "${ADDR}" ;;
+        *) set -- -n "${ADDR}" ;;
+      esac
+      ;;
+    *) set -- --ip "${ADDR}" ;;
+  esac
+
+  # Optionally, set password
+  case "${PASS}" in
+    '') set -- "$@" --no-password ;;
+    *) set -- "$@" --password "${PASS}" ;;
+  esac
+
+  # And init certificates and configs
+  smp-server init -y -l "$@"
+fi
+
+# Backup store log just in case
+#
+# Uses the UTC (universal) time zone and this
+# format: YYYY-mm-dd'T'HH:MM:SS
+# year, month, day, letter T, hour, minute, second
+#
+# This is the ISO 8601 format without the time zone at the end.
+#
+_file="${logd}/smp-server-store.log"
+if [ -f "${_file}" ]; then
+  _backup_extension="$(date -u '+%Y-%m-%dT%H:%M:%S')"
+  cp -v -p "${_file}" "${_file}.${_backup_extension:-date-failed}"
+  unset -v _backup_extension
+fi
+unset -v _file
+
+# Finally, run smp-sever. Notice that "exec" here is important:
+# smp-server replaces our helper script, so that it can catch INT signal
+exec smp-server start +RTS -N -RTS
+

scripts/docker/entrypoint-xftp-server

@@ -0,0 +1,48 @@
+#!/usr/bin/env sh
+confd='/etc/opt/simplex-xftp'
+logd='/var/opt/simplex-xftp'
+
+# Check if server has been initialized
+if [ ! -f "${confd}/file-server.ini" ]; then
+  # If not, determine ip or domain
+  case "${ADDR}" in
+    '') printf 'Please specify $ADDR environment variable.\n'; exit 1 ;;
+    *[a-zA-Z]*)
+      case "${ADDR}" in
+        *:*) set -- --ip "${ADDR}" ;;
+        *) set -- -n "${ADDR}" ;;
+      esac
+      ;;
+    *) set -- --ip "${ADDR}" ;;
+  esac
+
+  # Set quota
+  case "${QUOTA}" in
+    '') printf 'Please specify $QUOTA environment variable.\n'; exit 1 ;;
+    *) set -- "$@" --quota "${QUOTA}" ;;
+  esac
+
+  # Init the certificates and configs
+  xftp-server init -l -p /srv/xftp "$@"
+fi
+
+# Backup store log just in case
+#
+# Uses the UTC (universal) time zone and this
+# format: YYYY-mm-dd'T'HH:MM:SS
+# year, month, day, letter T, hour, minute, second
+#
+# This is the ISO 8601 format without the time zone at the end.
+#
+_file="${logd}/file-server-store.log"
+if [ -f "${_file}" ]; then
+  _backup_extension="$(date -u '+%Y-%m-%dT%H:%M:%S')"
+  cp -v -p "${_file}" "${_file}.${_backup_extension:-date-failed}"
+  unset -v _backup_extension
+fi
+unset -v _file
+
+# Finally, run xftp-sever. Notice that "exec" here is important:
+# smp-server replaces our helper script, so that it can catch INT signal
+exec xftp-server start +RTS -N -RTS
+

scripts/main/simplex-servers-stopscript

@@ -0,0 +1,30 @@
+#!/usr/bin/env sh
+set -eu
+
+path_conf_var="/var/opt"
+path_conf_smp="$path_conf_var/simplex"
+path_conf_xftp="$path_conf_var/simplex-xftp"
+path_conf_storelog_smp="$path_conf_smp/smp-server-store.log"
+path_conf_storelog_xftp="$path_conf_xftp/file-server-store.log"
+date="$(date -u '+%Y-%m-%dT%H:%M:%S')"
+
+backup_smp() {
+ if [ -e "$path_conf_storelog_smp" ]; then
+  cp "$path_conf_storelog_smp" "${path_conf_storelog_smp}.${date:-date-failed}"
+ fi
+}
+
+backup_xftp() {
+ if [ -e "$path_conf_storelog_xftp" ]; then
+  cp "$path_conf_storelog_xftp" "${path_conf_storelog_xftp}.${date:-date-failed}"
+ fi
+}
+
+if [ "$1" = 'smp-server' ]; then
+ backup_smp
+elif [ "$1" = 'xftp-server' ]; then
+ backup_xftp
+else
+ backup_smp
+ backup_xftp
+fi

scripts/main/simplex-servers-uninstall

@@ -0,0 +1,23 @@
+#!/usr/bin/env sh
+set -eu
+
+GRN='\033[0;32m'
+RED='\033[0;31m'
+NC='\033[0m'
+
+if [ "$(id -u)" -ne 0 ]; then
+  printf "This script is intended to be run with root privileges. Please re-run script using sudo."
+  exit 1
+fi
+
+printf "${RED}This action will permanently remove all configs, directories, binaries from Installation Script. Please backup any relevant configs if they are needed.${NC}\n\nPress ${GRN}ENTER${NC} to continue or ${RED}Ctrl+C${NC} to cancel installation"
+read ans
+
+systemctl stop smp-server
+systemctl stop xftp-server
+
+rm -rf /var/opt/simplex /etc/opt/simplex /var/opt/simplex-xftp /etc/opt/simplex-xftp /srv/xftp /etc/systemd/system/smp-server.service /etc/systemd/system/xftp-server.service /usr/local/bin/smp-server /usr/local/bin/xftp-server /usr/local/bin/simplex-servers-update /usr/local/bin/simplex-servers-uninstall
+
+userdel smp && userdel xftp
+
+printf "Uninstallation is complete! Thanks for trying out SimpleX!\n"

scripts/main/simplex-servers-update

@@ -0,0 +1,174 @@
+#!/usr/bin/env sh
+set -eu
+
+# Links to scripts/configs
+bin="https://github.com/simplex-chat/simplexmq/releases/latest/download"
+bin_smp="$bin/smp-server-ubuntu-20_04-x86-64"
+bin_xftp="$bin/xftp-server-ubuntu-20_04-x86-64"
+
+scripts="https://raw.githubusercontent.com/simplex-chat/simplexmq/stable/scripts/main"
+scripts_systemd_smp="$scripts/smp-server.service"
+scripts_systemd_xftp="$scripts/xftp-server.service"
+scripts_update="$scripts/simplex-servers-update"
+scripts_uninstall="$scripts/simplex-servers-uninstall"
+scripts_stopscript="$scripts/simplex-servers-stopscript"
+
+# Default installation paths
+path_bin="/usr/local/bin"
+path_bin_smp="$path_bin/smp-server"
+path_bin_xftp="$path_bin/xftp-server"
+path_bin_update="$path_bin/simplex-servers-update"
+path_bin_uninstall="$path_bin/simplex-servers-uninstall"
+path_bin_stopscript="$path_bin/simplex-servers-stopscript"
+
+path_systemd="/etc/systemd/system"
+path_systemd_smp="$path_systemd/smp-server.service"
+path_systemd_xftp="$path_systemd/xftp-server.service"
+
+# Temporary paths
+path_tmp_bin="$(mktemp -d)"
+path_tmp_bin_update="$path_tmp_bin/simplex-servers-update"
+path_tmp_bin_uninstall="$path_tmp_bin/simplex-servers-uninstall"
+path_tmp_bin_stopscript="$path_tmp_bin/simplex-servers-stopscript"
+path_tmp_systemd_smp="$path_tmp_bin/smp-server.service"
+path_tmp_systemd_xftp="$path_tmp_bin/xftp-server.service"
+
+GRN='\033[0;32m'
+BLU='\033[1;36m'
+YLW='\033[1;33m'
+RED='\033[0;31m'
+NC='\033[0m'
+
+# Currently, XFTP default to v0.1.0, so it doesn't make sense to check its version
+local_version="$($path_bin_smp -v | awk '{print $3}')"
+remote_version="$(curl --proto '=https' --tlsv1.2 -sSf -L https://api.github.com/repos/simplex-chat/simplexmq/releases/latest | grep -i "tag_name" | awk -F \" '{print $4}')"
+
+update_scripts() {
+  curl --proto '=https' --tlsv1.2 -sSf -L "$scripts_update" -o "$path_tmp_bin_update" && chmod +x "$path_tmp_bin_update"
+  curl --proto '=https' --tlsv1.2 -sSf -L "$scripts_uninstall" -o "$path_tmp_bin_uninstall" && chmod +x "$path_tmp_bin_uninstall"
+  curl --proto '=https' --tlsv1.2 -sSf -L "$scripts_stopscript" -o "$path_tmp_bin_stopscript" && chmod +x "$path_tmp_bin_stopscript"
+
+  if diff -q "$path_bin_uninstall" "$path_tmp_bin_uninstall" > /dev/null 2>&1; then
+    printf -- "- ${YLW}Uninstall script is up-to-date${NC}.\n"
+    rm "$path_tmp_bin_uninstall"
+  else
+    printf -- "- Updating uninstall script..."
+    mv "$path_tmp_bin_uninstall" "$path_bin_uninstall"
+    printf "${GRN}Done!${NC}\n"
+  fi
+  if diff -q "$path_bin_stopscript" "$path_tmp_bin_stopscript" > /dev/null 2>&1; then
+    printf -- "- ${YLW}Stopscript script is up-to-date${NC}.\n"
+    rm "$path_tmp_bin_stopscript"
+  else
+    printf -- "- Updating stopscript script..."
+    mv "$path_tmp_bin_stopscript" "$path_bin_stopscript"
+    printf "${GRN}Done!${NC}\n"
+  fi
+  if diff -q "$path_bin_update" "$path_tmp_bin_update" > /dev/null 2>&1; then
+    printf -- "- ${YLW}Update script is up-to-date${NC}.\n"
+    rm "$path_tmp_bin_update"
+  else
+    printf -- "- Updating update script..."
+    mv "$path_tmp_bin_update" "$path_bin_update"
+    printf "${GRN}Done!${NC}\n"
+    printf "Re-executing Update script with latest updates..."
+    exec sh "$path_bin_update" "continue"
+  fi
+}
+
+update_systemd() {
+  curl --proto '=https' --tlsv1.2 -sSf -L "$scripts_systemd_smp" -o "$path_tmp_systemd_smp"
+  curl --proto '=https' --tlsv1.2 -sSf -L "$scripts_systemd_xftp" -o "$path_tmp_systemd_xftp"
+
+  if diff -q "$path_systemd_smp" "$path_tmp_systemd_smp" > /dev/null 2>&1; then
+    printf -- "- ${YLW}smp-server service is up-to-date${NC}.\n"
+    rm "$path_tmp_systemd_smp"
+  else
+    printf -- "- Updating smp-server service..."
+    mv "$path_tmp_systemd_smp" "$path_systemd_smp"
+    systemctl daemon-reload
+    printf "${GRN}Done!${NC}\n"
+  fi
+  if diff -q "$path_systemd_xftp" "$path_tmp_systemd_xftp" > /dev/null 2>&1; then
+    printf -- "- ${YLW}xftp-server service is up-to-date${NC}.\n"
+    rm "$path_tmp_systemd_xftp"
+  else
+    printf -- "- Updating xftp-server service..."
+    mv "$path_tmp_systemd_xftp" "$path_systemd_xftp"
+    systemctl daemon-reload
+    printf "${GRN}Done!${NC}\n"
+  fi
+}
+
+update_bins() {
+  if [ "$local_version" != "$remote_version" ]; then
+    if systemctl is-active --quiet smp-server; then
+      printf -- "- Stopping smp-server service..."
+      systemctl stop smp-server
+      printf "${GRN}Done!${NC}\n"
+
+      printf -- "- Updating smp-server bin to %s..." "$remote_version"
+      curl --proto '=https' --tlsv1.2 -sSf -L "$bin_smp" -o "$path_bin_smp" && chmod +x "$path_bin_smp"
+      printf "${GRN}Done!${NC}\n"
+      
+      printf -- "- Starting smp-server service..."
+      systemctl start smp-server
+      printf "${GRN}Done!${NC}\n"
+    else
+      printf -- "- Updating smp-server bin..."
+      curl --proto '=https' --tlsv1.2 -sSf -L "$bin_smp" -o "$path_bin_smp" && chmod +x "$path_bin_smp"
+      printf "${GRN}Done!${NC}\n"
+    fi
+
+    if systemctl is-active --quiet xftp-server; then
+      printf -- "- Stopping xftp-server service..."
+      systemctl stop xftp-server
+      printf "${GRN}Done!${NC}\n"
+
+      printf -- "- Updating xftp-server bin to %s..." "$remote_version"
+      curl --proto '=https' --tlsv1.2 -sSf -L "$bin_xftp" -o "$path_bin_xftp" && chmod +x "$path_bin_xftp"
+      printf "${GRN}Done!${NC}\n"
+      
+      printf -- "- Starting xftp-server service..."
+      systemctl start xftp-server
+      printf "${GRN}Done!${NC}\n"
+    else
+      printf -- "- Updating xftp-server bin..."
+      curl --proto '=https' --tlsv1.2 -sSf -L "$bin_smp" -o "$path_bin_xftp" && chmod +x "$path_bin_xftp"
+      printf "${GRN}Done!${NC}\n"
+    fi
+  else
+    printf -- "- ${YLW}smp-server and xftp-server binaries is up-to-date${NC}.\n"
+  fi
+}
+
+checks() {
+  if [ "$(id -u)" -ne 0 ]; then
+    printf "This script is intended to be run with root privileges. Please re-run script using sudo.\n"
+    exit 1
+  fi
+}
+
+main() {
+  checks
+
+  set +u
+  if [ "$1" != "continue" ]; then
+    set -u
+    printf "Updating scripts...\n"
+    update_scripts
+  else
+    set -u
+    printf "${GRN}Done!${NC}\n"
+  fi
+
+  printf "Updating systemd services...\n"
+  update_systemd
+  
+  printf "Updating simplex server binaries...\n"
+  update_bins
+
+  rm -rf "$path_tmp_bin"
+}
+
+main "$@"

scripts/main/smp-server.service

@@ -0,0 +1,15 @@
+[Unit]
+Description=SMP server
+
+[Service]
+User=smp
+Group=smp
+Type=simple
+ExecStart=/usr/local/bin/smp-server start +RTS -N -RTS 
+ExecStopPost=/usr/local/bin/simplex-servers-stopscript smp-server
+LimitNOFILE=65535
+KillSignal=SIGINT
+TimeoutStopSec=infinity
+
+[Install]
+WantedBy=multi-user.target

scripts/main/xftp-server.service

@@ -0,0 +1,16 @@
+[Unit]
+Description=XFTP server
+
+[Service]
+User=xftp
+Group=xftp
+Type=simple
+ExecStart=/usr/local/bin/xftp-server start +RTS -N -RTS
+ExecStopPost=/usr/local/bin/simplex-servers-stopscript xftp-server
+LimitNOFILE=65535
+KillSignal=SIGINT
+TimeoutStopSec=infinity
+AmbientCapabilities=CAP_NET_BIND_SERVICE
+   
+[Install]
+WantedBy=multi-user.target

simplexmq.cabal

@@ -1,11 +1,11 @@
 cabal-version: 1.12
 
--- This file has been generated from package.yaml by hpack version 0.35.1.
+-- This file has been generated from package.yaml by hpack version 0.35.2.
 --
 -- see: https://github.com/sol/hpack
 
 name:           simplexmq
-version:        5.0.0
+version:        5.4.0.0
 synopsis:       SimpleXMQ message broker
 description:    This package includes <./docs/Simplex-Messaging-Server.html server>,
                 <./docs/Simplex-Messaging-Client.html client> and
@@ -34,10 +34,12 @@ flag swift
 
 library
   exposed-modules:
-      Simplex.FileTransfer
+      Simplex.FileTransfer.Agent
       Simplex.FileTransfer.Client
       Simplex.FileTransfer.Client.Agent
       Simplex.FileTransfer.Client.Main
+      Simplex.FileTransfer.Client.Presets
+      Simplex.FileTransfer.Crypto
       Simplex.FileTransfer.Description
       Simplex.FileTransfer.Protocol
       Simplex.FileTransfer.Server
@@ -47,6 +49,8 @@ library
       Simplex.FileTransfer.Server.Store
       Simplex.FileTransfer.Server.StoreLog
       Simplex.FileTransfer.Transport
+      Simplex.FileTransfer.Types
+      Simplex.FileTransfer.Util
       Simplex.Messaging.Agent
       Simplex.Messaging.Agent.Client
       Simplex.Messaging.Agent.Env.SQLite
@@ -58,6 +62,8 @@ library
       Simplex.Messaging.Agent.Server
       Simplex.Messaging.Agent.Store
       Simplex.Messaging.Agent.Store.SQLite
+      Simplex.Messaging.Agent.Store.SQLite.Common
+      Simplex.Messaging.Agent.Store.SQLite.DB
       Simplex.Messaging.Agent.Store.SQLite.Migrations
       Simplex.Messaging.Agent.Store.SQLite.Migrations.M20220101_initial
       Simplex.Messaging.Agent.Store.SQLite.Migrations.M20220301_snd_queue_keys
@@ -72,6 +78,17 @@ library
       Simplex.Messaging.Agent.Store.SQLite.Migrations.M20230117_fkey_indexes
       Simplex.Messaging.Agent.Store.SQLite.Migrations.M20230120_delete_errors
       Simplex.Messaging.Agent.Store.SQLite.Migrations.M20230217_server_key_hash
+      Simplex.Messaging.Agent.Store.SQLite.Migrations.M20230223_files
+      Simplex.Messaging.Agent.Store.SQLite.Migrations.M20230320_retry_state
+      Simplex.Messaging.Agent.Store.SQLite.Migrations.M20230401_snd_files
+      Simplex.Messaging.Agent.Store.SQLite.Migrations.M20230510_files_pending_replicas_indexes
+      Simplex.Messaging.Agent.Store.SQLite.Migrations.M20230516_encrypted_rcv_message_hashes
+      Simplex.Messaging.Agent.Store.SQLite.Migrations.M20230531_switch_status
+      Simplex.Messaging.Agent.Store.SQLite.Migrations.M20230615_ratchet_sync
+      Simplex.Messaging.Agent.Store.SQLite.Migrations.M20230701_delivery_receipts
+      Simplex.Messaging.Agent.Store.SQLite.Migrations.M20230720_delete_expired_messages
+      Simplex.Messaging.Agent.Store.SQLite.Migrations.M20230722_indexes
+      Simplex.Messaging.Agent.Store.SQLite.Migrations.M20230814_indexes
       Simplex.Messaging.Agent.TAsyncs
       Simplex.Messaging.Agent.TRcvQueues
       Simplex.Messaging.Client
@@ -96,6 +113,7 @@ library
       Simplex.Messaging.Protocol
       Simplex.Messaging.Server
       Simplex.Messaging.Server.CLI
+      Simplex.Messaging.Server.Control
       Simplex.Messaging.Server.Env.STM
       Simplex.Messaging.Server.Expiration
       Simplex.Messaging.Server.Main
@@ -124,7 +142,7 @@ library
   ghc-options: -Wall -Wcompat -Werror=incomplete-patterns -Wredundant-constraints -Wincomplete-record-updates -Wincomplete-uni-patterns -Wunused-type-patterns
   build-depends:
       QuickCheck ==2.14.*
-    , aeson ==2.0.*
+    , aeson ==2.2.*
     , ansi-terminal >=0.10 && <0.12
     , asn1-encoding ==0.9.*
     , asn1-types ==0.3.*
@@ -132,26 +150,27 @@ library
     , attoparsec ==0.14.*
     , base >=4.14 && <5
     , base64-bytestring >=1.0 && <1.3
-    , bytestring ==0.10.*
+    , bytestring ==0.11.*
     , case-insensitive ==1.2.*
     , composition ==1.0.*
     , constraints >=0.12 && <0.14
     , containers ==0.6.*
-    , cryptonite >=0.27 && <0.30
+    , cryptonite ==0.30.*
     , cryptostore ==0.2.*
     , data-default ==0.7.*
     , direct-sqlcipher ==2.3.*
     , directory ==1.3.*
     , filepath ==1.4.*
-    , generic-random >=1.3 && <1.5
+    , generic-random ==1.5.*
     , http-types ==0.12.*
-    , http2 ==4.0.*
+    , http2 ==4.1.*
     , ini ==0.4.1
+    , iproute ==1.7.*
     , iso8601-time ==0.1.*
-    , memory ==0.15.*
-    , mtl ==2.2.*
+    , memory ==0.18.*
+    , mtl ==2.3.*
     , network >=3.1.2.7 && <3.2
-    , network-transport ==0.5.4
+    , network-transport ==0.5.6
     , optparse-applicative >=0.15 && <0.17
     , process ==1.6.*
     , random >=1.1 && <1.3
@@ -159,14 +178,14 @@ library
     , socks ==0.6.*
     , sqlcipher-simple ==0.4.*
     , stm ==2.5.*
-    , template-haskell ==2.16.*
+    , template-haskell ==2.20.*
     , temporary ==1.3.*
-    , text ==1.2.*
+    , text ==2.0.*
     , time ==1.9.*
     , time-compat ==1.9.*
     , time-manager ==0.0.*
     , tls >=1.6.0 && <1.7
-    , transformers ==0.5.*
+    , transformers ==0.6.*
     , unliftio ==0.2.*
     , unliftio-core ==0.2.*
     , websockets ==0.12.*
@@ -187,7 +206,7 @@ executable ntf-server
   ghc-options: -Wall -Wcompat -Werror=incomplete-patterns -Wredundant-constraints -Wincomplete-record-updates -Wincomplete-uni-patterns -Wunused-type-patterns -threaded
   build-depends:
       QuickCheck ==2.14.*
-    , aeson ==2.0.*
+    , aeson ==2.2.*
     , ansi-terminal >=0.10 && <0.12
     , asn1-encoding ==0.9.*
     , asn1-types ==0.3.*
@@ -195,26 +214,27 @@ executable ntf-server
     , attoparsec ==0.14.*
     , base >=4.14 && <5
     , base64-bytestring >=1.0 && <1.3
-    , bytestring ==0.10.*
+    , bytestring ==0.11.*
     , case-insensitive ==1.2.*
     , composition ==1.0.*
     , constraints >=0.12 && <0.14
     , containers ==0.6.*
-    , cryptonite >=0.27 && <0.30
+    , cryptonite ==0.30.*
     , cryptostore ==0.2.*
     , data-default ==0.7.*
     , direct-sqlcipher ==2.3.*
     , directory ==1.3.*
     , filepath ==1.4.*
-    , generic-random >=1.3 && <1.5
+    , generic-random ==1.5.*
     , http-types ==0.12.*
-    , http2 ==4.0.*
+    , http2 ==4.1.*
     , ini ==0.4.1
+    , iproute ==1.7.*
     , iso8601-time ==0.1.*
-    , memory ==0.15.*
-    , mtl ==2.2.*
+    , memory ==0.18.*
+    , mtl ==2.3.*
     , network >=3.1.2.7 && <3.2
-    , network-transport ==0.5.4
+    , network-transport ==0.5.6
     , optparse-applicative >=0.15 && <0.17
     , process ==1.6.*
     , random >=1.1 && <1.3
@@ -223,13 +243,14 @@ executable ntf-server
     , socks ==0.6.*
     , sqlcipher-simple ==0.4.*
     , stm ==2.5.*
-    , template-haskell ==2.16.*
-    , text ==1.2.*
+    , template-haskell ==2.20.*
+    , temporary ==1.3.*
+    , text ==2.0.*
     , time ==1.9.*
     , time-compat ==1.9.*
     , time-manager ==0.0.*
     , tls >=1.6.0 && <1.7
-    , transformers ==0.5.*
+    , transformers ==0.6.*
     , unliftio ==0.2.*
     , unliftio-core ==0.2.*
     , websockets ==0.12.*
@@ -250,7 +271,7 @@ executable smp-agent
   ghc-options: -Wall -Wcompat -Werror=incomplete-patterns -Wredundant-constraints -Wincomplete-record-updates -Wincomplete-uni-patterns -Wunused-type-patterns -threaded
   build-depends:
       QuickCheck ==2.14.*
-    , aeson ==2.0.*
+    , aeson ==2.2.*
     , ansi-terminal >=0.10 && <0.12
     , asn1-encoding ==0.9.*
     , asn1-types ==0.3.*
@@ -258,26 +279,27 @@ executable smp-agent
     , attoparsec ==0.14.*
     , base >=4.14 && <5
     , base64-bytestring >=1.0 && <1.3
-    , bytestring ==0.10.*
+    , bytestring ==0.11.*
     , case-insensitive ==1.2.*
     , composition ==1.0.*
     , constraints >=0.12 && <0.14
     , containers ==0.6.*
-    , cryptonite >=0.27 && <0.30
+    , cryptonite ==0.30.*
     , cryptostore ==0.2.*
     , data-default ==0.7.*
     , direct-sqlcipher ==2.3.*
     , directory ==1.3.*
     , filepath ==1.4.*
-    , generic-random >=1.3 && <1.5
+    , generic-random ==1.5.*
     , http-types ==0.12.*
-    , http2 ==4.0.*
+    , http2 ==4.1.*
     , ini ==0.4.1
+    , iproute ==1.7.*
     , iso8601-time ==0.1.*
-    , memory ==0.15.*
-    , mtl ==2.2.*
+    , memory ==0.18.*
+    , mtl ==2.3.*
     , network >=3.1.2.7 && <3.2
-    , network-transport ==0.5.4
+    , network-transport ==0.5.6
     , optparse-applicative >=0.15 && <0.17
     , process ==1.6.*
     , random >=1.1 && <1.3
@@ -286,13 +308,14 @@ executable smp-agent
     , socks ==0.6.*
     , sqlcipher-simple ==0.4.*
     , stm ==2.5.*
-    , template-haskell ==2.16.*
-    , text ==1.2.*
+    , template-haskell ==2.20.*
+    , temporary ==1.3.*
+    , text ==2.0.*
     , time ==1.9.*
     , time-compat ==1.9.*
     , time-manager ==0.0.*
     , tls >=1.6.0 && <1.7
-    , transformers ==0.5.*
+    , transformers ==0.6.*
     , unliftio ==0.2.*
     , unliftio-core ==0.2.*
     , websockets ==0.12.*
@@ -313,7 +336,7 @@ executable smp-server
   ghc-options: -Wall -Wcompat -Werror=incomplete-patterns -Wredundant-constraints -Wincomplete-record-updates -Wincomplete-uni-patterns -Wunused-type-patterns -threaded
   build-depends:
       QuickCheck ==2.14.*
-    , aeson ==2.0.*
+    , aeson ==2.2.*
     , ansi-terminal >=0.10 && <0.12
     , asn1-encoding ==0.9.*
     , asn1-types ==0.3.*
@@ -321,26 +344,27 @@ executable smp-server
     , attoparsec ==0.14.*
     , base >=4.14 && <5
     , base64-bytestring >=1.0 && <1.3
-    , bytestring ==0.10.*
+    , bytestring ==0.11.*
     , case-insensitive ==1.2.*
     , composition ==1.0.*
     , constraints >=0.12 && <0.14
     , containers ==0.6.*
-    , cryptonite >=0.27 && <0.30
+    , cryptonite ==0.30.*
     , cryptostore ==0.2.*
     , data-default ==0.7.*
     , direct-sqlcipher ==2.3.*
     , directory ==1.3.*
     , filepath ==1.4.*
-    , generic-random >=1.3 && <1.5
+    , generic-random ==1.5.*
     , http-types ==0.12.*
-    , http2 ==4.0.*
+    , http2 ==4.1.*
     , ini ==0.4.1
+    , iproute ==1.7.*
     , iso8601-time ==0.1.*
-    , memory ==0.15.*
-    , mtl ==2.2.*
+    , memory ==0.18.*
+    , mtl ==2.3.*
     , network >=3.1.2.7 && <3.2
-    , network-transport ==0.5.4
+    , network-transport ==0.5.6
     , optparse-applicative >=0.15 && <0.17
     , process ==1.6.*
     , random >=1.1 && <1.3
@@ -349,13 +373,14 @@ executable smp-server
     , socks ==0.6.*
     , sqlcipher-simple ==0.4.*
     , stm ==2.5.*
-    , template-haskell ==2.16.*
-    , text ==1.2.*
+    , template-haskell ==2.20.*
+    , temporary ==1.3.*
+    , text ==2.0.*
     , time ==1.9.*
     , time-compat ==1.9.*
     , time-manager ==0.0.*
     , tls >=1.6.0 && <1.7
-    , transformers ==0.5.*
+    , transformers ==0.6.*
     , unliftio ==0.2.*
     , unliftio-core ==0.2.*
     , websockets ==0.12.*
@@ -376,7 +401,7 @@ executable xftp
   ghc-options: -Wall -Wcompat -Werror=incomplete-patterns -Wredundant-constraints -Wincomplete-record-updates -Wincomplete-uni-patterns -Wunused-type-patterns -threaded
   build-depends:
       QuickCheck ==2.14.*
-    , aeson ==2.0.*
+    , aeson ==2.2.*
     , ansi-terminal >=0.10 && <0.12
     , asn1-encoding ==0.9.*
     , asn1-types ==0.3.*
@@ -384,26 +409,27 @@ executable xftp
     , attoparsec ==0.14.*
     , base >=4.14 && <5
     , base64-bytestring >=1.0 && <1.3
-    , bytestring ==0.10.*
+    , bytestring ==0.11.*
     , case-insensitive ==1.2.*
     , composition ==1.0.*
     , constraints >=0.12 && <0.14
     , containers ==0.6.*
-    , cryptonite >=0.27 && <0.30
+    , cryptonite ==0.30.*
     , cryptostore ==0.2.*
     , data-default ==0.7.*
     , direct-sqlcipher ==2.3.*
     , directory ==1.3.*
     , filepath ==1.4.*
-    , generic-random >=1.3 && <1.5
+    , generic-random ==1.5.*
     , http-types ==0.12.*
-    , http2 ==4.0.*
+    , http2 ==4.1.*
     , ini ==0.4.1
+    , iproute ==1.7.*
     , iso8601-time ==0.1.*
-    , memory ==0.15.*
-    , mtl ==2.2.*
+    , memory ==0.18.*
+    , mtl ==2.3.*
     , network >=3.1.2.7 && <3.2
-    , network-transport ==0.5.4
+    , network-transport ==0.5.6
     , optparse-applicative >=0.15 && <0.17
     , process ==1.6.*
     , random >=1.1 && <1.3
@@ -412,14 +438,14 @@ executable xftp
     , socks ==0.6.*
     , sqlcipher-simple ==0.4.*
     , stm ==2.5.*
-    , template-haskell ==2.16.*
+    , template-haskell ==2.20.*
     , temporary ==1.3.*
-    , text ==1.2.*
+    , text ==2.0.*
     , time ==1.9.*
     , time-compat ==1.9.*
     , time-manager ==0.0.*
     , tls >=1.6.0 && <1.7
-    , transformers ==0.5.*
+    , transformers ==0.6.*
     , unliftio ==0.2.*
     , unliftio-core ==0.2.*
     , websockets ==0.12.*
@@ -440,7 +466,7 @@ executable xftp-server
   ghc-options: -Wall -Wcompat -Werror=incomplete-patterns -Wredundant-constraints -Wincomplete-record-updates -Wincomplete-uni-patterns -Wunused-type-patterns -threaded
   build-depends:
       QuickCheck ==2.14.*
-    , aeson ==2.0.*
+    , aeson ==2.2.*
     , ansi-terminal >=0.10 && <0.12
     , asn1-encoding ==0.9.*
     , asn1-types ==0.3.*
@@ -448,26 +474,27 @@ executable xftp-server
     , attoparsec ==0.14.*
     , base >=4.14 && <5
     , base64-bytestring >=1.0 && <1.3
-    , bytestring ==0.10.*
+    , bytestring ==0.11.*
     , case-insensitive ==1.2.*
     , composition ==1.0.*
     , constraints >=0.12 && <0.14
     , containers ==0.6.*
-    , cryptonite >=0.27 && <0.30
+    , cryptonite ==0.30.*
     , cryptostore ==0.2.*
     , data-default ==0.7.*
     , direct-sqlcipher ==2.3.*
     , directory ==1.3.*
     , filepath ==1.4.*
-    , generic-random >=1.3 && <1.5
+    , generic-random ==1.5.*
     , http-types ==0.12.*
-    , http2 ==4.0.*
+    , http2 ==4.1.*
     , ini ==0.4.1
+    , iproute ==1.7.*
     , iso8601-time ==0.1.*
-    , memory ==0.15.*
-    , mtl ==2.2.*
+    , memory ==0.18.*
+    , mtl ==2.3.*
     , network >=3.1.2.7 && <3.2
-    , network-transport ==0.5.4
+    , network-transport ==0.5.6
     , optparse-applicative >=0.15 && <0.17
     , process ==1.6.*
     , random >=1.1 && <1.3
@@ -476,13 +503,14 @@ executable xftp-server
     , socks ==0.6.*
     , sqlcipher-simple ==0.4.*
     , stm ==2.5.*
-    , template-haskell ==2.16.*
-    , text ==1.2.*
+    , template-haskell ==2.20.*
+    , temporary ==1.3.*
+    , text ==2.0.*
     , time ==1.9.*
     , time-compat ==1.9.*
     , time-manager ==0.0.*
     , tls >=1.6.0 && <1.7
-    , transformers ==0.5.*
+    , transformers ==0.6.*
     , unliftio ==0.2.*
     , unliftio-core ==0.2.*
     , websockets ==0.12.*
@@ -502,14 +530,17 @@ test-suite simplexmq-test
       AgentTests.ConnectionRequestTests
       AgentTests.DoubleRatchetTests
       AgentTests.FunctionalAPITests
+      AgentTests.MigrationTests
       AgentTests.NotificationTests
       AgentTests.SchemaDump
       AgentTests.SQLiteTests
       CLITests
+      CoreTests.BatchingTests
       CoreTests.CryptoTests
       CoreTests.EncodingTests
       CoreTests.ProtocolErrorTests
       CoreTests.RetryIntervalTests
+      CoreTests.UtilTests
       CoreTests.VersionRangeTests
       FileDescriptionTests
       NtfClient
@@ -517,6 +548,7 @@ test-suite simplexmq-test
       ServerTests
       SMPAgentClient
       SMPClient
+      XFTPAgent
       XFTPCLI
       XFTPClient
       XFTPServerTests
@@ -527,7 +559,7 @@ test-suite simplexmq-test
   build-depends:
       HUnit ==1.6.*
     , QuickCheck ==2.14.*
-    , aeson ==2.0.*
+    , aeson ==2.2.*
     , ansi-terminal >=0.10 && <0.12
     , asn1-encoding ==0.9.*
     , asn1-types ==0.3.*
@@ -535,29 +567,31 @@ test-suite simplexmq-test
     , attoparsec ==0.14.*
     , base >=4.14 && <5
     , base64-bytestring >=1.0 && <1.3
-    , bytestring ==0.10.*
+    , bytestring ==0.11.*
     , case-insensitive ==1.2.*
     , composition ==1.0.*
     , constraints >=0.12 && <0.14
     , containers ==0.6.*
-    , cryptonite >=0.27 && <0.30
+    , cryptonite ==0.30.*
     , cryptostore ==0.2.*
     , data-default ==0.7.*
+    , deepseq ==1.4.*
     , direct-sqlcipher ==2.3.*
     , directory ==1.3.*
     , filepath ==1.4.*
-    , generic-random >=1.3 && <1.5
-    , hspec ==2.7.*
-    , hspec-core ==2.7.*
+    , generic-random ==1.5.*
+    , hspec ==2.11.*
+    , hspec-core ==2.11.*
     , http-types ==0.12.*
-    , http2 ==4.0.*
+    , http2 ==4.1.*
     , ini ==0.4.1
+    , iproute ==1.7.*
     , iso8601-time ==0.1.*
     , main-tester ==0.2.*
-    , memory ==0.15.*
-    , mtl ==2.2.*
+    , memory ==0.18.*
+    , mtl ==2.3.*
     , network >=3.1.2.7 && <3.2
-    , network-transport ==0.5.4
+    , network-transport ==0.5.6
     , optparse-applicative >=0.15 && <0.17
     , process ==1.6.*
     , random >=1.1 && <1.3
@@ -567,14 +601,15 @@ test-suite simplexmq-test
     , socks ==0.6.*
     , sqlcipher-simple ==0.4.*
     , stm ==2.5.*
-    , template-haskell ==2.16.*
-    , text ==1.2.*
+    , template-haskell ==2.20.*
+    , temporary ==1.3.*
+    , text ==2.0.*
     , time ==1.9.*
     , time-compat ==1.9.*
     , time-manager ==0.0.*
     , timeit ==2.0.*
     , tls >=1.6.0 && <1.7
-    , transformers ==0.5.*
+    , transformers ==0.6.*
     , unliftio ==0.2.*
     , unliftio-core ==0.2.*
     , websockets ==0.12.*

src/Simplex/FileTransfer.hs

@@ -1,14 +0,0 @@
-module Simplex.FileTransfer where
-
--- TODO
--- Protocol
--- Store (in memory storage)
--- StoreLog (append only log)
--- FileDescription
--- Server
--- Client
--- Server/Main (server CLI)
--- Client/Main (client CLI)
---
--- Transport for HTTP2 ?
--- streaming Crypto

src/Simplex/FileTransfer/Agent.hs

@@ -0,0 +1,586 @@
+{-# LANGUAGE ConstraintKinds #-}
+{-# LANGUAGE DataKinds #-}
+{-# LANGUAGE DuplicateRecordFields #-}
+{-# LANGUAGE FlexibleContexts #-}
+{-# LANGUAGE LambdaCase #-}
+{-# LANGUAGE NamedFieldPuns #-}
+{-# LANGUAGE OverloadedRecordDot #-}
+{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE RankNTypes #-}
+{-# LANGUAGE ScopedTypeVariables #-}
+{-# LANGUAGE TupleSections #-}
+{-# LANGUAGE TypeApplications #-}
+
+{-# OPTIONS_GHC -fno-warn-ambiguous-fields #-}
+
+module Simplex.FileTransfer.Agent
+  ( startXFTPWorkers,
+    closeXFTPAgent,
+    toFSFilePath,
+    -- Receiving files
+    xftpReceiveFile',
+    xftpDeleteRcvFile',
+    -- Sending files
+    xftpSendFile',
+    deleteSndFileInternal,
+    deleteSndFileRemote,
+  )
+where
+
+import Control.Logger.Simple (logError)
+import Control.Monad
+import Control.Monad.Except
+import Control.Monad.Reader
+import qualified Data.ByteString.Char8 as B
+import qualified Data.ByteString.Lazy.Char8 as LB
+import Data.Int (Int64)
+import Data.List (foldl', sortOn)
+import qualified Data.List.NonEmpty as L
+import Data.Map (Map)
+import qualified Data.Map.Strict as M
+import Data.Text (Text)
+import Data.Time.Clock (getCurrentTime)
+import Data.Time.Format (defaultTimeLocale, formatTime)
+import Simplex.FileTransfer.Client (XFTPChunkSpec (..))
+import Simplex.FileTransfer.Client.Main
+import Simplex.FileTransfer.Crypto
+import Simplex.FileTransfer.Description
+import Simplex.FileTransfer.Protocol (FileParty (..), SFileParty (..))
+import Simplex.FileTransfer.Transport (XFTPRcvChunkSpec (..))
+import Simplex.FileTransfer.Types
+import Simplex.FileTransfer.Util (removePath, uniqueCombine)
+import Simplex.Messaging.Agent.Client
+import Simplex.Messaging.Agent.Env.SQLite
+import Simplex.Messaging.Agent.Protocol
+import Simplex.Messaging.Agent.RetryInterval
+import Simplex.Messaging.Agent.Store.SQLite
+import qualified Simplex.Messaging.Crypto as C
+import qualified Simplex.Messaging.Crypto.Lazy as LC
+import Simplex.Messaging.Encoding
+import Simplex.Messaging.Protocol (EntityId, XFTPServer)
+import Simplex.Messaging.TMap (TMap)
+import qualified Simplex.Messaging.TMap as TM
+import Simplex.Messaging.Util (liftError, tshow, unlessM, whenM)
+import System.FilePath (takeFileName, (</>))
+import UnliftIO
+import UnliftIO.Directory
+
+startXFTPWorkers :: AgentMonad m => AgentClient -> Maybe FilePath -> m ()
+startXFTPWorkers c workDir = do
+  wd <- asks $ xftpWorkDir . xftpAgent
+  atomically $ writeTVar wd workDir
+  startRcvFiles
+  startSndFiles
+  startDelFiles
+  where
+    startRcvFiles = do
+      rcvFilesTTL <- asks $ rcvFilesTTL . config
+      pendingRcvServers <- withStore' c (`getPendingRcvFilesServers` rcvFilesTTL)
+      forM_ pendingRcvServers $ \s -> addXFTPRcvWorker c (Just s)
+      -- start local worker for files pending decryption,
+      -- no need to make an extra query for the check
+      -- as the worker will check the store anyway
+      addXFTPRcvWorker c Nothing
+    startSndFiles = do
+      sndFilesTTL <- asks $ sndFilesTTL . config
+      -- start worker for files pending encryption/creation
+      addXFTPSndWorker c Nothing
+      pendingSndServers <- withStore' c (`getPendingSndFilesServers` sndFilesTTL)
+      forM_ pendingSndServers $ \s -> addXFTPSndWorker c (Just s)
+    startDelFiles = do
+      rcvFilesTTL <- asks $ rcvFilesTTL . config
+      pendingDelServers <- withStore' c (`getPendingDelFilesServers` rcvFilesTTL)
+      forM_ pendingDelServers $ addXFTPDelWorker c
+
+closeXFTPAgent :: MonadUnliftIO m => XFTPAgent -> m ()
+closeXFTPAgent XFTPAgent {xftpRcvWorkers, xftpSndWorkers} = do
+  stopWorkers xftpRcvWorkers
+  stopWorkers xftpSndWorkers
+  where
+    stopWorkers wsSel = do
+      ws <- atomically $ stateTVar wsSel (,M.empty)
+      mapM_ (uninterruptibleCancel . snd) ws
+
+xftpReceiveFile' :: AgentMonad m => AgentClient -> UserId -> ValidFileDescription 'FRecipient -> m RcvFileId
+xftpReceiveFile' c userId (ValidFileDescription fd@FileDescription {chunks}) = do
+  g <- asks idsDrg
+  prefixPath <- getPrefixPath "rcv.xftp"
+  createDirectory prefixPath
+  let relPrefixPath = takeFileName prefixPath
+      relTmpPath = relPrefixPath </> "xftp.encrypted"
+      relSavePath = relPrefixPath </> "xftp.decrypted"
+  createDirectory =<< toFSFilePath relTmpPath
+  createEmptyFile =<< toFSFilePath relSavePath
+  fId <- withStore c $ \db -> createRcvFile db g userId fd relPrefixPath relTmpPath relSavePath
+  forM_ chunks downloadChunk
+  pure fId
+  where
+    downloadChunk :: AgentMonad m => FileChunk -> m ()
+    downloadChunk FileChunk {replicas = (FileChunkReplica {server} : _)} = do
+      addXFTPRcvWorker c (Just server)
+    downloadChunk _ = throwError $ INTERNAL "no replicas"
+
+getPrefixPath :: AgentMonad m => String -> m FilePath
+getPrefixPath suffix = do
+  workPath <- getXFTPWorkPath
+  ts <- liftIO getCurrentTime
+  let isoTime = formatTime defaultTimeLocale "%Y%m%d_%H%M%S_%6q" ts
+  uniqueCombine workPath (isoTime <> "_" <> suffix)
+
+toFSFilePath :: AgentMonad m => FilePath -> m FilePath
+toFSFilePath f = (</> f) <$> getXFTPWorkPath
+
+createEmptyFile :: AgentMonad m => FilePath -> m ()
+createEmptyFile fPath = do
+  h <- openFile fPath AppendMode
+  liftIO $ B.hPut h "" >> hFlush h
+
+addXFTPRcvWorker :: AgentMonad m => AgentClient -> Maybe XFTPServer -> m ()
+addXFTPRcvWorker c = addWorker c xftpRcvWorkers runXFTPRcvWorker runXFTPRcvLocalWorker
+
+addWorker ::
+  AgentMonad m =>
+  AgentClient ->
+  (XFTPAgent -> TMap (Maybe XFTPServer) (TMVar (), Async ())) ->
+  (AgentClient -> XFTPServer -> TMVar () -> m ()) ->
+  (AgentClient -> TMVar () -> m ()) ->
+  Maybe XFTPServer ->
+  m ()
+addWorker c wsSel runWorker runWorkerNoSrv srv_ = do
+  ws <- asks $ wsSel . xftpAgent
+  atomically (TM.lookup srv_ ws) >>= \case
+    Nothing -> do
+      doWork <- newTMVarIO ()
+      let runWorker' = case srv_ of
+            Just srv -> runWorker c srv doWork
+            Nothing -> runWorkerNoSrv c doWork
+      worker <- async $ runWorker' `agentFinally` atomically (TM.delete srv_ ws)
+      atomically $ TM.insert srv_ (doWork, worker) ws
+    Just (doWork, _) ->
+      void . atomically $ tryPutTMVar doWork ()
+
+runXFTPRcvWorker :: forall m. AgentMonad m => AgentClient -> XFTPServer -> TMVar () -> m ()
+runXFTPRcvWorker c srv doWork = do
+  forever $ do
+    void . atomically $ readTMVar doWork
+    atomically $ assertAgentForeground c
+    runXFTPOperation
+  where
+    noWorkToDo = void . atomically $ tryTakeTMVar doWork
+    runXFTPOperation :: m ()
+    runXFTPOperation = do
+      rcvFilesTTL <- asks (rcvFilesTTL . config)
+      nextChunk <- withStore' c $ \db -> getNextRcvChunkToDownload db srv rcvFilesTTL
+      case nextChunk of
+        Nothing -> noWorkToDo
+        Just RcvFileChunk {rcvFileId, rcvFileEntityId, fileTmpPath, replicas = []} -> rcvWorkerInternalError c rcvFileId rcvFileEntityId (Just fileTmpPath) "chunk has no replicas"
+        Just fc@RcvFileChunk {userId, rcvFileId, rcvFileEntityId, digest, fileTmpPath, replicas = replica@RcvFileChunkReplica {rcvChunkReplicaId, server, delay} : _} -> do
+          ri <- asks $ reconnectInterval . config
+          let ri' = maybe ri (\d -> ri {initialInterval = d, increaseAfter = 0}) delay
+          withRetryInterval ri' $ \delay' loop ->
+            downloadFileChunk fc replica
+              `catchAgentError` \e -> retryOnError "XFTP rcv worker" (retryLoop loop e delay') (retryDone e) e
+          where
+            retryLoop loop e replicaDelay = do
+              flip catchAgentError (\_ -> pure ()) $ do
+                notifyOnRetry <- asks (xftpNotifyErrsOnRetry . config)
+                when notifyOnRetry $ notify c rcvFileEntityId $ RFERR e
+                closeXFTPServerClient c userId server digest
+                withStore' c $ \db -> updateRcvChunkReplicaDelay db rcvChunkReplicaId replicaDelay
+              atomically $ assertAgentForeground c
+              loop
+            retryDone e = rcvWorkerInternalError c rcvFileId rcvFileEntityId (Just fileTmpPath) (show e)
+    downloadFileChunk :: RcvFileChunk -> RcvFileChunkReplica -> m ()
+    downloadFileChunk RcvFileChunk {userId, rcvFileId, rcvFileEntityId, rcvChunkId, chunkNo, chunkSize, digest, fileTmpPath} replica = do
+      fsFileTmpPath <- toFSFilePath fileTmpPath
+      chunkPath <- uniqueCombine fsFileTmpPath $ show chunkNo
+      let chunkSpec = XFTPRcvChunkSpec chunkPath (unFileSize chunkSize) (unFileDigest digest)
+          relChunkPath = fileTmpPath </> takeFileName chunkPath
+      agentXFTPDownloadChunk c userId digest replica chunkSpec
+      atomically $ waitUntilForeground c
+      (complete, progress) <- withStore c $ \db -> runExceptT $ do
+        liftIO $ updateRcvFileChunkReceived db (rcvChunkReplicaId replica) rcvChunkId relChunkPath
+        RcvFile {size = FileSize total, chunks} <- ExceptT $ getRcvFile db rcvFileId
+        let rcvd = receivedSize chunks
+            complete = all chunkReceived chunks
+        liftIO . when complete $ updateRcvFileStatus db rcvFileId RFSReceived
+        pure (complete, RFPROG rcvd total)
+      notify c rcvFileEntityId progress
+      when complete $ addXFTPRcvWorker c Nothing
+      where
+        receivedSize :: [RcvFileChunk] -> Int64
+        receivedSize = foldl' (\sz ch -> sz + receivedChunkSize ch) 0
+        receivedChunkSize ch@RcvFileChunk {chunkSize = s}
+          | chunkReceived ch = fromIntegral (unFileSize s)
+          | otherwise = 0
+        chunkReceived RcvFileChunk {replicas} = any received replicas
+
+retryOnError :: AgentMonad m => Text -> m a -> m a -> AgentErrorType -> m a
+retryOnError name loop done e = do
+  logError $ name <> " error: " <> tshow e
+  if temporaryAgentError e
+    then loop
+    else done
+
+rcvWorkerInternalError :: AgentMonad m => AgentClient -> DBRcvFileId -> RcvFileId -> Maybe FilePath -> String -> m ()
+rcvWorkerInternalError c rcvFileId rcvFileEntityId tmpPath internalErrStr = do
+  forM_ tmpPath (removePath <=< toFSFilePath)
+  withStore' c $ \db -> updateRcvFileError db rcvFileId internalErrStr
+  notify c rcvFileEntityId $ RFERR $ INTERNAL internalErrStr
+
+runXFTPRcvLocalWorker :: forall m. AgentMonad m => AgentClient -> TMVar () -> m ()
+runXFTPRcvLocalWorker c doWork = do
+  forever $ do
+    void . atomically $ readTMVar doWork
+    atomically $ assertAgentForeground c
+    runXFTPOperation
+  where
+    runXFTPOperation :: m ()
+    runXFTPOperation = do
+      rcvFilesTTL <- asks (rcvFilesTTL . config)
+      nextFile <- withStore' c (`getNextRcvFileToDecrypt` rcvFilesTTL)
+      case nextFile of
+        Nothing -> noWorkToDo
+        Just f@RcvFile {rcvFileId, rcvFileEntityId, tmpPath} ->
+          decryptFile f `catchAgentError` (rcvWorkerInternalError c rcvFileId rcvFileEntityId tmpPath . show)
+    noWorkToDo = void . atomically $ tryTakeTMVar doWork
+    decryptFile :: RcvFile -> m ()
+    decryptFile RcvFile {rcvFileId, rcvFileEntityId, key, nonce, tmpPath, savePath, status, chunks} = do
+      fsSavePath <- toFSFilePath savePath
+      when (status == RFSDecrypting) $
+        whenM (doesFileExist fsSavePath) (removeFile fsSavePath >> createEmptyFile fsSavePath)
+      withStore' c $ \db -> updateRcvFileStatus db rcvFileId RFSDecrypting
+      chunkPaths <- getChunkPaths chunks
+      encSize <- liftIO $ foldM (\s path -> (s +) . fromIntegral <$> getFileSize path) 0 chunkPaths
+      void $ liftError (INTERNAL . show) $ decryptChunks encSize chunkPaths key nonce $ \_ -> pure fsSavePath
+      notify c rcvFileEntityId $ RFDONE fsSavePath
+      forM_ tmpPath (removePath <=< toFSFilePath)
+      atomically $ waitUntilForeground c
+      withStore' c (`updateRcvFileComplete` rcvFileId)
+      where
+        getChunkPaths :: [RcvFileChunk] -> m [FilePath]
+        getChunkPaths [] = pure []
+        getChunkPaths (RcvFileChunk {chunkTmpPath = Just path} : cs) = do
+          ps <- getChunkPaths cs
+          fsPath <- toFSFilePath path
+          pure $ fsPath : ps
+        getChunkPaths (RcvFileChunk {chunkTmpPath = Nothing} : _cs) =
+          throwError $ INTERNAL "no chunk path"
+
+xftpDeleteRcvFile' :: AgentMonad m => AgentClient -> RcvFileId -> m ()
+xftpDeleteRcvFile' c rcvFileEntityId = do
+  RcvFile {rcvFileId, prefixPath, status} <- withStore c $ \db -> getRcvFileByEntityId db rcvFileEntityId
+  if status == RFSComplete || status == RFSError
+    then do
+      removePath prefixPath
+      withStore' c (`deleteRcvFile'` rcvFileId)
+    else withStore' c (`updateRcvFileDeleted` rcvFileId)
+
+notify :: forall m e. (MonadUnliftIO m, AEntityI e) => AgentClient -> EntityId -> ACommand 'Agent e -> m ()
+notify c entId cmd = atomically $ writeTBQueue (subQ c) ("", entId, APC (sAEntity @e) cmd)
+
+xftpSendFile' :: AgentMonad m => AgentClient -> UserId -> FilePath -> Int -> m SndFileId
+xftpSendFile' c userId filePath numRecipients = do
+  g <- asks idsDrg
+  prefixPath <- getPrefixPath "snd.xftp"
+  createDirectory prefixPath
+  let relPrefixPath = takeFileName prefixPath
+  key <- liftIO C.randomSbKey
+  nonce <- liftIO C.randomCbNonce
+  -- saving absolute filePath will not allow to restore file encryption after app update, but it's a short window
+  fId <- withStore c $ \db -> createSndFile db g userId numRecipients filePath relPrefixPath key nonce
+  addXFTPSndWorker c Nothing
+  pure fId
+
+addXFTPSndWorker :: AgentMonad m => AgentClient -> Maybe XFTPServer -> m ()
+addXFTPSndWorker c = addWorker c xftpSndWorkers runXFTPSndWorker runXFTPSndPrepareWorker
+
+runXFTPSndPrepareWorker :: forall m. AgentMonad m => AgentClient -> TMVar () -> m ()
+runXFTPSndPrepareWorker c doWork = do
+  forever $ do
+    void . atomically $ readTMVar doWork
+    atomically $ assertAgentForeground c
+    runXFTPOperation
+  where
+    runXFTPOperation :: m ()
+    runXFTPOperation = do
+      sndFilesTTL <- asks (sndFilesTTL . config)
+      nextFile <- withStore' c (`getNextSndFileToPrepare` sndFilesTTL)
+      case nextFile of
+        Nothing -> noWorkToDo
+        Just f@SndFile {sndFileId, sndFileEntityId, prefixPath} ->
+          prepareFile f `catchAgentError` (sndWorkerInternalError c sndFileId sndFileEntityId prefixPath . show)
+    noWorkToDo = void . atomically $ tryTakeTMVar doWork
+    prepareFile :: SndFile -> m ()
+    prepareFile SndFile {prefixPath = Nothing} =
+      throwError $ INTERNAL "no prefix path"
+    prepareFile sndFile@SndFile {sndFileId, userId, prefixPath = Just ppath, status} = do
+      SndFile {numRecipients, chunks} <-
+        if status /= SFSEncrypted -- status is SFSNew or SFSEncrypting
+          then do
+            fsEncPath <- toFSFilePath $ sndFileEncPath ppath
+            when (status == SFSEncrypting) $
+              whenM (doesFileExist fsEncPath) $ removeFile fsEncPath
+            withStore' c $ \db -> updateSndFileStatus db sndFileId SFSEncrypting
+            (digest, chunkSpecsDigests) <- encryptFileForUpload sndFile fsEncPath
+            withStore c $ \db -> do
+              updateSndFileEncrypted db sndFileId digest chunkSpecsDigests
+              getSndFile db sndFileId
+          else pure sndFile
+      maxRecipients <- asks (xftpMaxRecipientsPerRequest . config)
+      let numRecipients' = min numRecipients maxRecipients
+      -- concurrently?
+      forM_ (filter (not . chunkCreated) chunks) $ createChunk numRecipients'
+      withStore' c $ \db -> updateSndFileStatus db sndFileId SFSUploading
+      where
+        encryptFileForUpload :: SndFile -> FilePath -> m (FileDigest, [(XFTPChunkSpec, FileDigest)])
+        encryptFileForUpload SndFile {key, nonce, filePath} fsEncPath = do
+          let fileName = takeFileName filePath
+          fileSize <- fromInteger <$> getFileSize filePath
+          when (fileSize > maxFileSize) $ throwError $ INTERNAL "max file size exceeded"
+          let fileHdr = smpEncode FileHeader {fileName, fileExtra = Nothing}
+              fileSize' = fromIntegral (B.length fileHdr) + fileSize
+              chunkSizes = prepareChunkSizes $ fileSize' + fileSizeLen + authTagSize
+              chunkSizes' = map fromIntegral chunkSizes
+              encSize = sum chunkSizes'
+          void $ liftError (INTERNAL . show) $ encryptFile filePath fileHdr key nonce fileSize' encSize fsEncPath
+          digest <- liftIO $ LC.sha512Hash <$> LB.readFile fsEncPath
+          let chunkSpecs = prepareChunkSpecs fsEncPath chunkSizes
+          chunkDigests <- map FileDigest <$> mapM (liftIO . getChunkDigest) chunkSpecs
+          pure (FileDigest digest, zip chunkSpecs chunkDigests)
+        chunkCreated :: SndFileChunk -> Bool
+        chunkCreated SndFileChunk {replicas} =
+          any (\SndFileChunkReplica {replicaStatus} -> replicaStatus == SFRSCreated) replicas
+        createChunk :: Int -> SndFileChunk -> m ()
+        createChunk numRecipients' ch = do
+          atomically $ assertAgentForeground c
+          (replica, ProtoServerWithAuth srv _) <- tryCreate
+          withStore' c $ \db -> createSndFileReplica db ch replica
+          addXFTPSndWorker c $ Just srv
+          where
+            tryCreate = do
+              ri <- asks $ messageRetryInterval . config
+              usedSrvs <- newTVarIO ([] :: [XFTPServer])
+              withRetryInterval (riFast ri) $ \_ loop ->
+                createWithNextSrv usedSrvs
+                  `catchAgentError` \e -> retryOnError "XFTP prepare worker" (retryLoop loop) (throwError e) e
+              where
+                retryLoop loop = atomically (assertAgentForeground c) >> loop
+            createWithNextSrv usedSrvs = do
+              deleted <- withStore' c $ \db -> getSndFileDeleted db sndFileId
+              when deleted $ throwError $ INTERNAL "file deleted, aborting chunk creation"
+              withNextSrv c userId usedSrvs [] $ \srvAuth -> do
+                replica <- agentXFTPNewChunk c ch numRecipients' srvAuth
+                pure (replica, srvAuth)
+
+sndWorkerInternalError :: AgentMonad m => AgentClient -> DBSndFileId -> SndFileId -> Maybe FilePath -> String -> m ()
+sndWorkerInternalError c sndFileId sndFileEntityId prefixPath internalErrStr = do
+  forM_ prefixPath $ removePath <=< toFSFilePath
+  withStore' c $ \db -> updateSndFileError db sndFileId internalErrStr
+  notify c sndFileEntityId $ SFERR $ INTERNAL internalErrStr
+
+runXFTPSndWorker :: forall m. AgentMonad m => AgentClient -> XFTPServer -> TMVar () -> m ()
+runXFTPSndWorker c srv doWork = do
+  forever $ do
+    void . atomically $ readTMVar doWork
+    atomically $ assertAgentForeground c
+    runXFTPOperation
+  where
+    noWorkToDo = void . atomically $ tryTakeTMVar doWork
+    runXFTPOperation :: m ()
+    runXFTPOperation = do
+      sndFilesTTL <- asks (sndFilesTTL . config)
+      nextChunk <- withStore' c $ \db -> getNextSndChunkToUpload db srv sndFilesTTL
+      case nextChunk of
+        Nothing -> noWorkToDo
+        Just SndFileChunk {sndFileId, sndFileEntityId, filePrefixPath, replicas = []} -> sndWorkerInternalError c sndFileId sndFileEntityId (Just filePrefixPath) "chunk has no replicas"
+        Just fc@SndFileChunk {userId, sndFileId, sndFileEntityId, filePrefixPath, digest, replicas = replica@SndFileChunkReplica {sndChunkReplicaId, server, delay} : _} -> do
+          ri <- asks $ reconnectInterval . config
+          let ri' = maybe ri (\d -> ri {initialInterval = d, increaseAfter = 0}) delay
+          withRetryInterval ri' $ \delay' loop ->
+            uploadFileChunk fc replica
+              `catchAgentError` \e -> retryOnError "XFTP snd worker" (retryLoop loop e delay') (retryDone e) e
+          where
+            retryLoop loop e replicaDelay = do
+              flip catchAgentError (\_ -> pure ()) $ do
+                notifyOnRetry <- asks (xftpNotifyErrsOnRetry . config)
+                when notifyOnRetry $ notify c sndFileEntityId $ SFERR e
+                closeXFTPServerClient c userId server digest
+                withStore' c $ \db -> updateSndChunkReplicaDelay db sndChunkReplicaId replicaDelay
+              atomically $ assertAgentForeground c
+              loop
+            retryDone e = sndWorkerInternalError c sndFileId sndFileEntityId (Just filePrefixPath) (show e)
+    uploadFileChunk :: SndFileChunk -> SndFileChunkReplica -> m ()
+    uploadFileChunk sndFileChunk@SndFileChunk {sndFileId, userId, chunkSpec = chunkSpec@XFTPChunkSpec {filePath}, digest = chunkDigest} replica = do
+      replica'@SndFileChunkReplica {sndChunkReplicaId} <- addRecipients sndFileChunk replica
+      fsFilePath <- toFSFilePath filePath
+      unlessM (doesFileExist fsFilePath) $ throwError $ INTERNAL "encrypted file doesn't exist on upload"
+      let chunkSpec' = chunkSpec {filePath = fsFilePath} :: XFTPChunkSpec
+      atomically $ assertAgentForeground c
+      agentXFTPUploadChunk c userId chunkDigest replica' chunkSpec'
+      atomically $ waitUntilForeground c
+      sf@SndFile {sndFileEntityId, prefixPath, chunks} <- withStore c $ \db -> do
+        updateSndChunkReplicaStatus db sndChunkReplicaId SFRSUploaded
+        getSndFile db sndFileId
+      let uploaded = uploadedSize chunks
+          total = totalSize chunks
+          complete = all chunkUploaded chunks
+      notify c sndFileEntityId $ SFPROG uploaded total
+      when complete $ do
+        (sndDescr, rcvDescrs) <- sndFileToDescrs sf
+        notify c sndFileEntityId $ SFDONE sndDescr rcvDescrs
+        forM_ prefixPath $ removePath <=< toFSFilePath
+        withStore' c $ \db -> updateSndFileComplete db sndFileId
+      where
+        addRecipients :: SndFileChunk -> SndFileChunkReplica -> m SndFileChunkReplica
+        addRecipients ch@SndFileChunk {numRecipients} cr@SndFileChunkReplica {rcvIdsKeys}
+          | length rcvIdsKeys > numRecipients = throwError $ INTERNAL "too many recipients"
+          | length rcvIdsKeys == numRecipients = pure cr
+          | otherwise = do
+            maxRecipients <- asks $ xftpMaxRecipientsPerRequest . config
+            let numRecipients' = min (numRecipients - length rcvIdsKeys) maxRecipients
+            rcvIdsKeys' <- agentXFTPAddRecipients c userId chunkDigest cr numRecipients'
+            cr' <- withStore' c $ \db -> addSndChunkReplicaRecipients db cr $ L.toList rcvIdsKeys'
+            addRecipients ch cr'
+        sndFileToDescrs :: SndFile -> m (ValidFileDescription 'FSender, [ValidFileDescription 'FRecipient])
+        sndFileToDescrs SndFile {digest = Nothing} = throwError $ INTERNAL "snd file has no digest"
+        sndFileToDescrs SndFile {chunks = []} = throwError $ INTERNAL "snd file has no chunks"
+        sndFileToDescrs SndFile {digest = Just digest, key, nonce, chunks = chunks@(fstChunk : _)} = do
+          let chunkSize = FileSize $ sndChunkSize fstChunk
+              size = FileSize $ sum $ map (fromIntegral . sndChunkSize) chunks
+          -- snd description
+          sndDescrChunks <- mapM toSndDescrChunk chunks
+          let fdSnd = FileDescription {party = SFSender, size, digest, key, nonce, chunkSize, chunks = sndDescrChunks}
+          validFdSnd <- either (throwError . INTERNAL) pure $ validateFileDescription fdSnd
+          -- rcv descriptions
+          let fdRcv = FileDescription {party = SFRecipient, size, digest, key, nonce, chunkSize, chunks = []}
+              fdRcvs = createRcvFileDescriptions fdRcv chunks
+          validFdRcvs <- either (throwError . INTERNAL) pure $ mapM validateFileDescription fdRcvs
+          pure (validFdSnd, validFdRcvs)
+        toSndDescrChunk :: SndFileChunk -> m FileChunk
+        toSndDescrChunk SndFileChunk {replicas = []} = throwError $ INTERNAL "snd file chunk has no replicas"
+        toSndDescrChunk ch@SndFileChunk {chunkNo, digest = chDigest, replicas = (SndFileChunkReplica {server, replicaId, replicaKey} : _)} = do
+          let chunkSize = FileSize $ sndChunkSize ch
+              replicas = [FileChunkReplica {server, replicaId, replicaKey}]
+          pure FileChunk {chunkNo, digest = chDigest, chunkSize, replicas}
+        createRcvFileDescriptions :: FileDescription 'FRecipient -> [SndFileChunk] -> [FileDescription 'FRecipient]
+        createRcvFileDescriptions fd sndChunks = map (\chunks -> (fd :: (FileDescription 'FRecipient)) {chunks}) rcvChunks
+          where
+            rcvReplicas :: [SentRecipientReplica]
+            rcvReplicas = concatMap toSentRecipientReplicas sndChunks
+            toSentRecipientReplicas :: SndFileChunk -> [SentRecipientReplica]
+            toSentRecipientReplicas ch@SndFileChunk {chunkNo, digest, replicas} =
+              let chunkSize = FileSize $ sndChunkSize ch
+               in concatMap
+                    ( \SndFileChunkReplica {server, rcvIdsKeys} ->
+                        zipWith
+                          (\rcvNo (replicaId, replicaKey) -> SentRecipientReplica {chunkNo, server, rcvNo, replicaId, replicaKey, digest, chunkSize})
+                          [1 ..]
+                          rcvIdsKeys
+                    )
+                    replicas
+            rcvChunks :: [[FileChunk]]
+            rcvChunks = map (sortChunks . M.elems) $ M.elems $ foldl' addRcvChunk M.empty rcvReplicas
+            sortChunks :: [FileChunk] -> [FileChunk]
+            sortChunks = map reverseReplicas . sortOn (\fc -> fc.chunkNo)
+            reverseReplicas ch@FileChunk {replicas} = (ch :: FileChunk) {replicas = reverse replicas}
+            addRcvChunk :: Map Int (Map Int FileChunk) -> SentRecipientReplica -> Map Int (Map Int FileChunk)
+            addRcvChunk m SentRecipientReplica {chunkNo, server, rcvNo, replicaId, replicaKey, digest, chunkSize} =
+              M.alter (Just . addOrChangeRecipient) rcvNo m
+              where
+                addOrChangeRecipient :: Maybe (Map Int FileChunk) -> Map Int FileChunk
+                addOrChangeRecipient = \case
+                  Just m' -> M.alter (Just . addOrChangeChunk) chunkNo m'
+                  _ -> M.singleton chunkNo $ FileChunk {chunkNo, digest, chunkSize, replicas = [replica']}
+                addOrChangeChunk :: Maybe FileChunk -> FileChunk
+                addOrChangeChunk = \case
+                  Just ch@FileChunk {replicas} -> ch {replicas = replica' : replicas}
+                  _ -> FileChunk {chunkNo, digest, chunkSize, replicas = [replica']}
+                replica' = FileChunkReplica {server, replicaId, replicaKey}
+        uploadedSize :: [SndFileChunk] -> Int64
+        uploadedSize = foldl' (\sz ch -> sz + uploadedChunkSize ch) 0
+        uploadedChunkSize ch
+          | chunkUploaded ch = fromIntegral (sndChunkSize ch)
+          | otherwise = 0
+        totalSize :: [SndFileChunk] -> Int64
+        totalSize = foldl' (\sz ch -> sz + fromIntegral (sndChunkSize ch)) 0
+        chunkUploaded :: SndFileChunk -> Bool
+        chunkUploaded SndFileChunk {replicas} =
+          any (\SndFileChunkReplica {replicaStatus} -> replicaStatus == SFRSUploaded) replicas
+
+deleteSndFileInternal :: AgentMonad m => AgentClient -> SndFileId -> m ()
+deleteSndFileInternal c sndFileEntityId = do
+  SndFile {sndFileId, prefixPath, status} <- withStore c $ \db -> getSndFileByEntityId db sndFileEntityId
+  if status == SFSComplete || status == SFSError
+    then do
+      forM_ prefixPath $ removePath <=< toFSFilePath
+      withStore' c (`deleteSndFile'` sndFileId)
+    else withStore' c (`updateSndFileDeleted` sndFileId)
+
+deleteSndFileRemote :: forall m. AgentMonad m => AgentClient -> UserId -> SndFileId -> ValidFileDescription 'FSender -> m ()
+deleteSndFileRemote c userId sndFileEntityId (ValidFileDescription FileDescription {chunks}) = do
+  deleteSndFileInternal c sndFileEntityId `catchAgentError` (notify c sndFileEntityId . SFERR)
+  forM_ chunks $ \ch -> deleteFileChunk ch `catchAgentError` (notify c sndFileEntityId . SFERR)
+  where
+    deleteFileChunk :: FileChunk -> m ()
+    deleteFileChunk FileChunk {digest, replicas = replica@FileChunkReplica {server} : _} = do
+      withStore' c $ \db -> createDeletedSndChunkReplica db userId replica digest
+      addXFTPDelWorker c server
+    deleteFileChunk _ = pure ()
+
+addXFTPDelWorker :: AgentMonad m => AgentClient -> XFTPServer -> m ()
+addXFTPDelWorker c srv = do
+  ws <- asks $ xftpDelWorkers . xftpAgent
+  atomically (TM.lookup srv ws) >>= \case
+    Nothing -> do
+      doWork <- newTMVarIO ()
+      worker <- async $ runXFTPDelWorker c srv doWork `agentFinally` atomically (TM.delete srv ws)
+      atomically $ TM.insert srv (doWork, worker) ws
+    Just (doWork, _) ->
+      void . atomically $ tryPutTMVar doWork ()
+
+runXFTPDelWorker :: forall m. AgentMonad m => AgentClient -> XFTPServer -> TMVar () -> m ()
+runXFTPDelWorker c srv doWork = do
+  forever $ do
+    void . atomically $ readTMVar doWork
+    atomically $ assertAgentForeground c
+    runXFTPOperation
+  where
+    noWorkToDo = void . atomically $ tryTakeTMVar doWork
+    runXFTPOperation :: m ()
+    runXFTPOperation = do
+      -- no point in deleting files older than rcv ttl, as they will be expired on server
+      rcvFilesTTL <- asks (rcvFilesTTL . config)
+      nextReplica <- withStore' c $ \db -> getNextDeletedSndChunkReplica db srv rcvFilesTTL
+      case nextReplica of
+        Nothing -> noWorkToDo
+        Just replica@DeletedSndChunkReplica {deletedSndChunkReplicaId, userId, server, chunkDigest, delay} -> do
+          ri <- asks $ reconnectInterval . config
+          let ri' = maybe ri (\d -> ri {initialInterval = d, increaseAfter = 0}) delay
+          withRetryInterval ri' $ \delay' loop ->
+            deleteChunkReplica replica
+              `catchAgentError` \e -> retryOnError "XFTP del worker" (retryLoop loop e delay') (retryDone e) e
+          where
+            retryLoop loop e replicaDelay = do
+              flip catchAgentError (\_ -> pure ()) $ do
+                notifyOnRetry <- asks (xftpNotifyErrsOnRetry . config)
+                when notifyOnRetry $ notify c "" $ SFERR e
+                closeXFTPServerClient c userId server chunkDigest
+                withStore' c $ \db -> updateDeletedSndChunkReplicaDelay db deletedSndChunkReplicaId replicaDelay
+              atomically $ assertAgentForeground c
+              loop
+            retryDone e = delWorkerInternalError c deletedSndChunkReplicaId e
+    deleteChunkReplica :: DeletedSndChunkReplica -> m ()
+    deleteChunkReplica replica@DeletedSndChunkReplica {userId, deletedSndChunkReplicaId} = do
+      agentXFTPDeleteChunk c userId replica
+      withStore' c $ \db -> deleteDeletedSndChunkReplica db deletedSndChunkReplicaId
+
+delWorkerInternalError :: AgentMonad m => AgentClient -> Int64 -> AgentErrorType -> m ()
+delWorkerInternalError c deletedSndChunkReplicaId e = do
+  withStore' c $ \db -> deleteDeletedSndChunkReplica db deletedSndChunkReplicaId
+  notify c "" $ SFERR e
+
+assertAgentForeground :: AgentClient -> STM ()
+assertAgentForeground c = do
+  throwWhenInactive c
+  waitUntilForeground c

src/Simplex/FileTransfer/Client.hs

@@ -3,12 +3,14 @@
 {-# LANGUAGE DuplicateRecordFields #-}
 {-# LANGUAGE LambdaCase #-}
 {-# LANGUAGE NamedFieldPuns #-}
+{-# LANGUAGE OverloadedRecordDot #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE ScopedTypeVariables #-}
 {-# LANGUAGE TypeApplications #-}
 
 module Simplex.FileTransfer.Client where
 
+import Control.Monad
 import Control.Monad.Except
 import Data.Bifunctor (first)
 import Data.ByteString.Builder (Builder, byteString)
@@ -16,6 +18,7 @@ import Data.ByteString.Char8 (ByteString)
 import qualified Data.ByteString.Char8 as B
 import Data.Int (Int64)
 import Data.List.NonEmpty (NonEmpty (..))
+import Data.Time (UTCTime)
 import Data.Word (Word32)
 import qualified Network.HTTP.Types as N
 import qualified Network.HTTP2.Client as H
@@ -31,8 +34,10 @@ import Simplex.Messaging.Client
     proxyUsername,
     transportClientConfig,
   )
+import Simplex.Messaging.Client.Agent ()
 import qualified Simplex.Messaging.Crypto as C
 import qualified Simplex.Messaging.Crypto.Lazy as LC
+import Simplex.Messaging.Encoding.String
 import Simplex.Messaging.Protocol
   ( BasicAuth,
     Protocol (..),
@@ -41,21 +46,22 @@ import Simplex.Messaging.Protocol
     SenderId,
   )
 import Simplex.Messaging.Transport (supportedParameters)
-import Simplex.Messaging.Transport.Client (TransportClientConfig)
+import Simplex.Messaging.Transport.Client (TransportClientConfig, TransportHost)
 import Simplex.Messaging.Transport.HTTP2
 import Simplex.Messaging.Transport.HTTP2.Client
 import Simplex.Messaging.Util (bshow, liftEitherError, whenM)
+import UnliftIO
 import UnliftIO.Directory
-import UnliftIO.IO
 
 data XFTPClient = XFTPClient
   { http2Client :: HTTP2Client,
+    transportSession :: TransportSession FileResponse,
     config :: XFTPClientConfig
   }
 
 data XFTPClientConfig = XFTPClientConfig
-  { networkConfig :: NetworkConfig,
-    uploadTimeoutPerMb :: Int
+  { xftpNetworkConfig :: NetworkConfig,
+    uploadTimeoutPerMb :: Int64
   }
 
 data XFTPChunkBody = XFTPChunkBody
@@ -69,30 +75,48 @@ data XFTPChunkSpec = XFTPChunkSpec
     chunkOffset :: Int64,
     chunkSize :: Word32
   }
-  deriving (Show)
+  deriving (Eq, Show)
 
 type XFTPClientError = ProtocolClientError XFTPErrorType
 
 defaultXFTPClientConfig :: XFTPClientConfig
 defaultXFTPClientConfig =
   XFTPClientConfig
-    { networkConfig = defaultNetworkConfig,
+    { xftpNetworkConfig = defaultNetworkConfig,
       uploadTimeoutPerMb = 10000000 -- 10 seconds
     }
 
-getXFTPClient :: TransportSession FileResponse -> XFTPClientConfig -> IO () -> IO (Either XFTPClientError XFTPClient)
-getXFTPClient transportSession@(_, srv, _) config@XFTPClientConfig {networkConfig} disconnected = runExceptT $ do
-  let tcConfig = transportClientConfig networkConfig
+getXFTPClient :: TransportSession FileResponse -> XFTPClientConfig -> (XFTPClient -> IO ()) -> IO (Either XFTPClientError XFTPClient)
+getXFTPClient transportSession@(_, srv, _) config@XFTPClientConfig {xftpNetworkConfig} disconnected = runExceptT $ do
+  let tcConfig = transportClientConfig xftpNetworkConfig
       http2Config = xftpHTTP2Config tcConfig config
       username = proxyUsername transportSession
       ProtocolServer _ host port keyHash = srv
-  useHost <- liftEither $ chooseTransportHost networkConfig host
+  useHost <- liftEither $ chooseTransportHost xftpNetworkConfig host
+  clientVar <- newTVarIO Nothing
   let usePort = if null port then "443" else port
-  http2Client <- liftEitherError xftpClientError $ getVerifiedHTTP2Client (Just username) useHost usePort (Just keyHash) Nothing http2Config disconnected
-  pure XFTPClient {http2Client, config}
+      clientDisconnected = readTVarIO clientVar >>= mapM_ disconnected
+  http2Client <- liftEitherError xftpClientError $ getVerifiedHTTP2Client (Just username) useHost usePort (Just keyHash) Nothing http2Config clientDisconnected
+  let c = XFTPClient {http2Client, transportSession, config}
+  atomically $ writeTVar clientVar $ Just c
+  pure c
+
+closeXFTPClient :: XFTPClient -> IO ()
+closeXFTPClient XFTPClient {http2Client} = closeHTTP2Client http2Client
+
+xftpClientServer :: XFTPClient -> String
+xftpClientServer = B.unpack . strEncode . snd3 . transportSession
+  where
+    snd3 (_, s, _) = s
+
+xftpTransportHost :: XFTPClient -> TransportHost
+xftpTransportHost c = c.http2Client.client_.host
+
+xftpSessionTs :: XFTPClient -> UTCTime
+xftpSessionTs = sessionTs . http2Client
 
 xftpHTTP2Config :: TransportClientConfig -> XFTPClientConfig -> HTTP2ClientConfig
-xftpHTTP2Config transportConfig XFTPClientConfig {networkConfig = NetworkConfig {tcpConnectTimeout}} =
+xftpHTTP2Config transportConfig XFTPClientConfig {xftpNetworkConfig = NetworkConfig {tcpConnectTimeout}} =
   defaultHTTP2ClientConfig
     { bodyHeadSize = xftpBlockSize,
       suportedTLSParams = supportedParameters,
@@ -112,7 +136,7 @@ sendXFTPCommand XFTPClient {config, http2Client = http2@HTTP2Client {sessionId}}
     liftEither . first PCETransportError $
       xftpEncodeTransmission sessionId (Just pKey) ("", fId, FileCmd (sFileParty @p) cmd)
   let req = H.requestStreaming N.methodPost "/" [] $ streamBody t
-      reqTimeout = (\XFTPChunkSpec {chunkSize} -> (fromIntegral chunkSize * uploadTimeoutPerMb config) `div` mb) <$> chunkSpec_
+      reqTimeout = (\XFTPChunkSpec {chunkSize} -> chunkTimeout config chunkSize) <$> chunkSpec_
   HTTP2Response {respBody = body@HTTP2Body {bodyHead}} <- liftEitherError xftpClientError $ sendRequest http2 req reqTimeout
   when (B.length bodyHead /= xftpBlockSize) $ throwError $ PCEResponseError BLOCK
   -- TODO validate that the file ID is the same as in the request?
@@ -139,31 +163,43 @@ createXFTPChunk ::
   NonEmpty C.APublicVerifyKey ->
   Maybe BasicAuth ->
   ExceptT XFTPClientError IO (SenderId, NonEmpty RecipientId)
-createXFTPChunk c spKey file rsps auth_ =
-  sendXFTPCommand c spKey "" (FNEW file rsps auth_) Nothing >>= \case
+createXFTPChunk c spKey file rcps auth_ =
+  sendXFTPCommand c spKey "" (FNEW file rcps auth_) Nothing >>= \case
     (FRSndIds sId rIds, body) -> noFile body (sId, rIds)
     (r, _) -> throwError . PCEUnexpectedResponse $ bshow r
 
+addXFTPRecipients :: XFTPClient -> C.APrivateSignKey -> XFTPFileId -> NonEmpty C.APublicVerifyKey -> ExceptT XFTPClientError IO (NonEmpty RecipientId)
+addXFTPRecipients c spKey fId rcps =
+  sendXFTPCommand c spKey fId (FADD rcps) Nothing >>= \case
+    (FRRcvIds rIds, body) -> noFile body rIds
+    (r, _) -> throwError . PCEUnexpectedResponse $ bshow r
+
 uploadXFTPChunk :: XFTPClient -> C.APrivateSignKey -> XFTPFileId -> XFTPChunkSpec -> ExceptT XFTPClientError IO ()
 uploadXFTPChunk c spKey fId chunkSpec =
   sendXFTPCommand c spKey fId FPUT (Just chunkSpec) >>= okResponse
 
 downloadXFTPChunk :: XFTPClient -> C.APrivateSignKey -> XFTPFileId -> XFTPRcvChunkSpec -> ExceptT XFTPClientError IO ()
-downloadXFTPChunk c rpKey fId chunkSpec@XFTPRcvChunkSpec {filePath} = do
+downloadXFTPChunk c@XFTPClient {config} rpKey fId chunkSpec@XFTPRcvChunkSpec {filePath, chunkSize} = do
   (rDhKey, rpDhKey) <- liftIO C.generateKeyPair'
   sendXFTPCommand c rpKey fId (FGET rDhKey) Nothing >>= \case
-    (FRFile sDhKey cbNonce, HTTP2Body {bodyHead, bodySize, bodyPart}) -> case bodyPart of
+    (FRFile sDhKey cbNonce, HTTP2Body {bodyHead = _bg, bodySize = _bs, bodyPart}) -> case bodyPart of
       -- TODO atm bodySize is set to 0, so chunkSize will be incorrect - validate once set
       Just chunkPart -> do
         let dhSecret = C.dh' sDhKey rpDhKey
         cbState <- liftEither . first PCECryptoError $ LC.cbInit dhSecret cbNonce
-        -- timeout download in the same way as upload
-        withExceptT PCEResponseError $
-          receiveEncFile chunkPart cbState chunkSpec `catchError` \e ->
-            whenM (doesFileExist filePath) (removeFile filePath) >> throwError e
+        let t = chunkTimeout config chunkSize
+        t `timeout` download cbState >>= maybe (throwError PCEResponseTimeout) pure
+        where
+          download cbState =
+            withExceptT PCEResponseError $
+              receiveEncFile chunkPart cbState chunkSpec `catchError` \e ->
+                whenM (doesFileExist filePath) (removeFile filePath) >> throwError e
       _ -> throwError $ PCEResponseError NO_FILE
     (r, _) -> throwError . PCEUnexpectedResponse $ bshow r
 
+chunkTimeout :: XFTPClientConfig -> Word32 -> Int
+chunkTimeout config chunkSize = fromIntegral $ (fromIntegral chunkSize * uploadTimeoutPerMb config) `div` mb 1
+
 deleteXFTPChunk :: XFTPClient -> C.APrivateSignKey -> SenderId -> ExceptT XFTPClientError IO ()
 deleteXFTPChunk c spKey sId = sendXFTPCommand c spKey sId FDEL Nothing >>= okResponse
 
@@ -181,7 +217,5 @@ noFile HTTP2Body {bodyPart} a = case bodyPart of
   Just _ -> pure a -- throwError $ PCEResponseError HAS_FILE
   _ -> pure a
 
--- FADD :: NonEmpty RcvPublicVerifyKey -> FileCommand Sender
--- FDEL :: FileCommand Sender
 -- FACK :: FileCommand Recipient
 -- PING :: FileCommand Recipient

src/Simplex/FileTransfer/Client/Agent.hs

@@ -1,5 +1,6 @@
 {-# LANGUAGE DeriveAnyClass #-}
 {-# LANGUAGE DuplicateRecordFields #-}
+{-# LANGUAGE LambdaCase #-}
 {-# LANGUAGE NamedFieldPuns #-}
 {-# LANGUAGE NumericUnderscores #-}
 {-# LANGUAGE OverloadedStrings #-}
@@ -7,6 +8,7 @@
 module Simplex.FileTransfer.Client.Agent where
 
 import Control.Logger.Simple (logInfo)
+import Control.Monad
 import Control.Monad.Except
 import Data.Bifunctor (first)
 import qualified Data.ByteString.Char8 as B
@@ -20,7 +22,7 @@ import Simplex.Messaging.Encoding.String
 import Simplex.Messaging.Protocol (ProtocolServer (..), XFTPServer)
 import Simplex.Messaging.TMap (TMap)
 import qualified Simplex.Messaging.TMap as TM
-import Simplex.Messaging.Util (tryError)
+import Simplex.Messaging.Util (catchAll_)
 import UnliftIO
 
 type XFTPClientVar = TMVar (Either XFTPClientAgentError XFTPClient)
@@ -67,8 +69,8 @@ getXFTPServerClient XFTPClientAgent {xftpClients, config} srv = do
         first (XFTPClientAgentError srv)
           <$> getXFTPClient (1, srv, Nothing) (xftpConfig config) clientDisconnected
 
-    clientDisconnected :: IO ()
-    clientDisconnected = do
+    clientDisconnected :: XFTPClient -> IO ()
+    clientDisconnected _ = do
       atomically $ TM.delete srv xftpClients
       logInfo $ "disconnected from " <> showServer srv
 
@@ -83,7 +85,7 @@ getXFTPServerClient XFTPClientAgent {xftpClients, config} srv = do
 
     waitForXFTPClient :: XFTPClientVar -> ME XFTPClient
     waitForXFTPClient clientVar = do
-      let XFTPClientConfig {networkConfig = NetworkConfig {tcpConnectTimeout}} = xftpConfig config
+      let XFTPClientConfig {xftpNetworkConfig = NetworkConfig {tcpConnectTimeout}} = xftpConfig config
       client_ <- tcpConnectTimeout `timeout` atomically (readTMVar clientVar)
       liftEither $ case client_ of
         Just (Right c) -> Right c
@@ -109,8 +111,18 @@ getXFTPServerClient XFTPClientAgent {xftpClients, config} srv = do
               throwError e
         tryConnectAsync :: ME ()
         tryConnectAsync = void . async $ do
-          withRetryInterval (reconnectInterval config) $ void . tryConnectClient
+          withRetryInterval (reconnectInterval config) $ \_ loop -> void $ tryConnectClient loop
 
 showServer :: XFTPServer -> Text
 showServer ProtocolServer {host, port} =
   decodeUtf8 $ strEncode host <> B.pack (if null port then "" else ':' : port)
+
+closeXFTPServerClient :: XFTPClientAgent -> XFTPServer -> IO ()
+closeXFTPServerClient XFTPClientAgent {xftpClients, config} srv =
+  atomically (TM.lookupDelete srv xftpClients) >>= mapM_ closeClient
+  where
+    closeClient cVar = do
+      let NetworkConfig {tcpConnectTimeout} = xftpNetworkConfig $ xftpConfig config
+      tcpConnectTimeout `timeout` atomically (readTMVar cVar) >>= \case
+        Just (Right client) -> closeXFTPClient client `catchAll_` pure ()
+        _ -> pure ()

src/Simplex/FileTransfer/Client/Main.hs

@@ -1,15 +1,36 @@
 {-# LANGUAGE DataKinds #-}
 {-# LANGUAGE DeriveAnyClass #-}
 {-# LANGUAGE DuplicateRecordFields #-}
+{-# LANGUAGE FlexibleContexts #-}
 {-# LANGUAGE GADTs #-}
 {-# LANGUAGE LambdaCase #-}
 {-# LANGUAGE NamedFieldPuns #-}
+{-# LANGUAGE OverloadedRecordDot #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE ScopedTypeVariables #-}
+{-# LANGUAGE TypeApplications #-}
 
-module Simplex.FileTransfer.Client.Main (xftpClientCLI) where
+{-# OPTIONS_GHC -fno-warn-ambiguous-fields #-}
 
-import Control.Concurrent.STM (stateTVar)
+module Simplex.FileTransfer.Client.Main
+  ( SendOptions (..),
+    CLIError (..),
+    xftpClientCLI,
+    cliSendFile,
+    cliSendFileOpts,
+    prepareChunkSizes,
+    prepareChunkSpecs,
+    chunkSize1,
+    chunkSize2,
+    chunkSize3,
+    maxFileSize,
+    fileSizeLen,
+    getChunkDigest,
+    SentRecipientReplica (..),
+  )
+where
+
+import Control.Logger.Simple
 import Control.Monad
 import Control.Monad.Except
 import Crypto.Random (getRandomBytes)
@@ -18,54 +39,73 @@ import Data.Bifunctor (first)
 import Data.ByteString.Char8 (ByteString)
 import qualified Data.ByteString.Char8 as B
 import qualified Data.ByteString.Lazy.Char8 as LB
-import Data.Function (on)
+import Data.Char (toLower)
 import Data.Int (Int64)
-import Data.List (foldl', groupBy, sortOn)
+import Data.List (foldl', sortOn)
 import Data.List.NonEmpty (NonEmpty (..), nonEmpty)
 import qualified Data.List.NonEmpty as L
 import Data.Map (Map)
 import qualified Data.Map as M
 import Data.Maybe (fromMaybe)
+import qualified Data.Text as T
 import Data.Word (Word32)
+import GHC.Records (HasField (getField))
 import Options.Applicative
 import Simplex.FileTransfer.Client
 import Simplex.FileTransfer.Client.Agent
+import Simplex.FileTransfer.Client.Presets
+import Simplex.FileTransfer.Crypto
 import Simplex.FileTransfer.Description
 import Simplex.FileTransfer.Protocol
 import Simplex.FileTransfer.Transport (XFTPRcvChunkSpec (..))
+import Simplex.FileTransfer.Types
+import Simplex.FileTransfer.Util (uniqueCombine)
 import qualified Simplex.Messaging.Crypto as C
 import qualified Simplex.Messaging.Crypto.Lazy as LC
 import Simplex.Messaging.Encoding
 import Simplex.Messaging.Encoding.String (StrEncoding (..))
 import Simplex.Messaging.Parsers (parseAll)
-import Simplex.Messaging.Protocol (ProtoServerWithAuth (..), SenderId, SndPrivateSignKey, SndPublicVerifyKey, XFTPServer, XFTPServerWithAuth)
+import Simplex.Messaging.Protocol (ProtoServerWithAuth (..), SenderId, SndPrivateSignKey, XFTPServer, XFTPServerWithAuth)
 import Simplex.Messaging.Server.CLI (getCliCommand')
-import Simplex.Messaging.Util (ifM, whenM)
+import Simplex.Messaging.Util (groupAllOn, ifM, tshow, whenM)
 import System.Exit (exitFailure)
-import System.FilePath (splitExtensions, splitFileName, (</>))
+import System.FilePath (splitFileName, (</>))
 import System.IO.Temp (getCanonicalTemporaryDirectory)
 import System.Random (StdGen, newStdGen, randomR)
 import UnliftIO
 import UnliftIO.Directory
 
 xftpClientVersion :: String
-xftpClientVersion = "0.1.0"
+xftpClientVersion = "1.0.1"
 
-defaultChunkSize :: Word32
-defaultChunkSize = 4 * mb
+chunkSize1 :: Word32
+chunkSize1 = kb 256
 
-smallChunkSize :: Word32
-smallChunkSize = 1 * mb
+chunkSize2 :: Word32
+chunkSize2 = mb 1
+
+chunkSize3 :: Word32
+chunkSize3 = mb 4
+
+maxFileSize :: Int64
+maxFileSize = gb 1
+
+maxFileSizeStr :: String
+maxFileSizeStr = B.unpack . strEncode $ FileSize maxFileSize
 
 fileSizeLen :: Int64
 fileSizeLen = 8
 
-authTagSize :: Int64
-authTagSize = fromIntegral C.authTagSize
-
 newtype CLIError = CLIError String
   deriving (Eq, Show, Exception)
 
+cliCryptoError :: FTCryptoError -> CLIError
+cliCryptoError = \case
+  FTCECryptoError e -> CLIError $ "Error decrypting file: " <> show e
+  FTCEInvalidHeader e -> CLIError $ "Invalid file header: " <> e
+  FTCEInvalidAuthTag -> CLIError "Error decrypting file: incorrect auth tag"
+  FTCEFileIOError e -> CLIError $ "File IO error: " <> show e
+
 data CliCommand
   = SendFile SendOptions
   | ReceiveFile ReceiveOptions
@@ -79,7 +119,8 @@ data SendOptions = SendOptions
     numRecipients :: Int,
     xftpServers :: [XFTPServerWithAuth],
     retryCount :: Int,
-    tempPath :: Maybe FilePath
+    tempPath :: Maybe FilePath,
+    verbose :: Bool
   }
   deriving (Show)
 
@@ -87,13 +128,17 @@ data ReceiveOptions = ReceiveOptions
   { fileDescription :: FilePath,
     filePath :: Maybe FilePath,
     retryCount :: Int,
-    tempPath :: Maybe FilePath
+    tempPath :: Maybe FilePath,
+    verbose :: Bool,
+    yes :: Bool
   }
   deriving (Show)
 
 data DeleteOptions = DeleteOptions
   { fileDescription :: FilePath,
-    retryCount :: Int
+    retryCount :: Int,
+    verbose :: Bool,
+    yes :: Bool
   }
   deriving (Show)
 
@@ -104,16 +149,13 @@ newtype InfoOptions = InfoOptions
 
 data RandomFileOptions = RandomFileOptions
   { filePath :: FilePath,
-    fileSize :: FileSize Int
+    fileSize :: FileSize Int64
   }
   deriving (Show)
 
 defaultRetryCount :: Int
 defaultRetryCount = 3
 
-defaultXFTPServers :: NonEmpty XFTPServerWithAuth
-defaultXFTPServers = L.fromList ["xftp://vr0bXzm4iKkLvleRMxLznTS-lHjXEyXunxn_7VJckk4=@localhost:443"]
-
 cliCommandP :: Parser CliCommand
 cliCommandP =
   hsubparser
@@ -121,8 +163,8 @@ cliCommandP =
         <> command "recv" (info (ReceiveFile <$> receiveP) (progDesc "Receive file"))
         <> command "del" (info (DeleteFile <$> deleteP) (progDesc "Delete file from server(s)"))
         <> command "info" (info (FileDescrInfo <$> infoP) (progDesc "Show file description"))
-        <> command "rand" (info (RandomFile <$> randomP) (progDesc "Generate a random file of a given size"))
     )
+    <|> hsubparser (command "rand" (info (RandomFile <$> randomP) (progDesc "Generate a random file of a given size")) <> internal)
   where
     sendP :: Parser SendOptions
     sendP =
@@ -133,6 +175,7 @@ cliCommandP =
         <*> xftpServers
         <*> retryCountP
         <*> temp
+        <*> verboseP
     receiveP :: Parser ReceiveOptions
     receiveP =
       ReceiveOptions
@@ -140,22 +183,27 @@ cliCommandP =
         <*> optional (argument str $ metavar "DIR" <> help "Directory to save file (default: system Downloads directory)")
         <*> retryCountP
         <*> temp
+        <*> verboseP
+        <*> yesP
     deleteP :: Parser DeleteOptions
     deleteP =
       DeleteOptions
         <$> fileDescrArg
         <*> retryCountP
+        <*> verboseP
+        <*> yesP
     infoP :: Parser InfoOptions
     infoP = InfoOptions <$> fileDescrArg
     randomP :: Parser RandomFileOptions
     randomP =
       RandomFileOptions
         <$> argument str (metavar "FILE" <> help "Path to save file")
-        <*> argument strDec (metavar "SIZE" <> help "File size (bytes/kb/mb/gb)")
-    strDec = eitherReader $ strDecode . B.pack
+        <*> argument str (metavar "SIZE" <> help "File size (bytes/kb/mb/gb)")
     fileDescrArg = argument str (metavar "FILE" <> help "File description file")
     retryCountP = option auto (long "retry" <> short 'r' <> metavar "RETRY" <> help "Number of network retries" <> value defaultRetryCount <> showDefault)
     temp = optional (strOption $ long "tmp" <> metavar "TMP" <> help "Directory for temporary encrypted file (default: system temp directory)")
+    verboseP = switch (long "verbose" <> short 'v' <> help "Verbose output")
+    yesP = switch (long "yes" <> short 'y' <> help "Yes to questions")
     xftpServers =
       option
         parseXFTPServers
@@ -194,41 +242,40 @@ data SentRecipientReplica = SentRecipientReplica
     chunkSize :: FileSize Word32
   }
 
+logCfg :: LogConfig
+logCfg = LogConfig {lc_file = Nothing, lc_stderr = True}
+
 xftpClientCLI :: IO ()
 xftpClientCLI =
   getCliCommand' cliCommandP clientVersion >>= \case
-    SendFile opts -> runE $ cliSendFile opts
-    ReceiveFile opts -> runE $ cliReceiveFile opts
-    DeleteFile opts -> runE $ cliDeleteFile opts
+    SendFile opts -> runLogE opts $ cliSendFile opts
+    ReceiveFile opts -> runLogE opts $ cliReceiveFile opts
+    DeleteFile opts -> runLogE opts $ cliDeleteFile opts
     FileDescrInfo opts -> runE $ cliFileDescrInfo opts
     RandomFile opts -> cliRandomFile opts
   where
     clientVersion = "SimpleX XFTP client v" <> xftpClientVersion
 
+runLogE :: HasField "verbose" a Bool => a -> ExceptT CLIError IO () -> IO ()
+runLogE opts a
+  | getField @"verbose" opts = setLogLevel LogDebug >> withGlobalLogging logCfg (runE a)
+  | otherwise = runE a
+
 runE :: ExceptT CLIError IO () -> IO ()
 runE a =
   runExceptT a >>= \case
     Left (CLIError e) -> putStrLn e >> exitFailure
     _ -> pure ()
 
--- fileExtra is added to allow header extension in future versions
-data FileHeader = FileHeader
-  { fileName :: String,
-    fileExtra :: Maybe String
-  }
-  deriving (Eq, Show)
-
-instance Encoding FileHeader where
-  smpEncode FileHeader {fileName, fileExtra} = smpEncode (fileName, fileExtra)
-  smpP = do
-    (fileName, fileExtra) <- smpP
-    pure FileHeader {fileName, fileExtra}
-
 cliSendFile :: SendOptions -> ExceptT CLIError IO ()
-cliSendFile SendOptions {filePath, outputDir, numRecipients, xftpServers, retryCount, tempPath} = do
+cliSendFile opts = cliSendFileOpts opts True $ printProgress "Uploaded"
+
+cliSendFileOpts :: SendOptions -> Bool -> (Int64 -> Int64 -> IO ()) -> ExceptT CLIError IO ()
+cliSendFileOpts SendOptions {filePath, outputDir, numRecipients, xftpServers, retryCount, tempPath, verbose} printInfo notifyProgress = do
   let (_, fileName) = splitFileName filePath
-  (encPath, fdRcv, fdSnd, chunkSpecs, encSize) <- encryptFile fileName
-  liftIO $ printNoNewLine "Uploading file..."
+  liftIO $ when printInfo $ printNoNewLine "Encrypting file..."
+  (encPath, fdRcv, fdSnd, chunkSpecs, encSize) <- encryptFileForUpload fileName
+  liftIO $ when printInfo $ printNoNewLine "Uploading file..."
   uploadedChunks <- newTVarIO []
   sentChunks <- uploadFile chunkSpecs uploadedChunks encSize
   whenM (doesFileExist encPath) $ removeFile encPath
@@ -237,36 +284,32 @@ cliSendFile SendOptions {filePath, outputDir, numRecipients, xftpServers, retryC
     let fdRcvs = createRcvFileDescriptions fdRcv sentChunks
         fdSnd' = createSndFileDescription fdSnd sentChunks
     (fdRcvPaths, fdSndPath) <- writeFileDescriptions fileName fdRcvs fdSnd'
-    printNoNewLine "File uploaded!"
-    putStrLn "\nPass file descriptions to the recipient(s):"
+    when printInfo $ do
+      printNoNewLine "File uploaded!"
+      putStrLn $ "\nSender file description: " <> fdSndPath
+      putStrLn "Pass file descriptions to the recipient(s):"
     forM_ fdRcvPaths putStrLn
-    putStrLn "Sender file description:"
-    putStrLn fdSndPath
   where
-    encryptFile :: String -> ExceptT CLIError IO (FilePath, FileDescription 'FPRecipient, FileDescription 'FPSender, [XFTPChunkSpec], Int64)
-    encryptFile fileName = do
+    encryptFileForUpload :: String -> ExceptT CLIError IO (FilePath, FileDescription 'FRecipient, FileDescription 'FSender, [XFTPChunkSpec], Int64)
+    encryptFileForUpload fileName = do
+      fileSize <- fromInteger <$> getFileSize filePath
+      when (fileSize > maxFileSize) $ throwError $ CLIError $ "Files bigger than " <> maxFileSizeStr <> " are not supported"
       encPath <- getEncPath tempPath "xftp"
       key <- liftIO C.randomSbKey
       nonce <- liftIO C.randomCbNonce
-      fileSize <- fromInteger <$> getFileSize filePath
       let fileHdr = smpEncode FileHeader {fileName, fileExtra = Nothing}
           fileSize' = fromIntegral (B.length fileHdr) + fileSize
           chunkSizes = prepareChunkSizes $ fileSize' + fileSizeLen + authTagSize
+          defChunkSize = head chunkSizes
           chunkSizes' = map fromIntegral chunkSizes
           encSize = sum chunkSizes'
-      encrypt fileHdr key nonce fileSize' encSize encPath
+      withExceptT (CLIError . show) $ encryptFile filePath fileHdr key nonce fileSize' encSize encPath
       digest <- liftIO $ LC.sha512Hash <$> LB.readFile encPath
       let chunkSpecs = prepareChunkSpecs encPath chunkSizes
-          fdRcv = FileDescription {party = SRecipient, size = FileSize encSize, digest = FileDigest digest, key, nonce, chunkSize = FileSize defaultChunkSize, chunks = []}
-          fdSnd = FileDescription {party = SSender, size = FileSize encSize, digest = FileDigest digest, key, nonce, chunkSize = FileSize defaultChunkSize, chunks = []}
+          fdRcv = FileDescription {party = SFRecipient, size = FileSize encSize, digest = FileDigest digest, key, nonce, chunkSize = FileSize defChunkSize, chunks = []}
+          fdSnd = FileDescription {party = SFSender, size = FileSize encSize, digest = FileDigest digest, key, nonce, chunkSize = FileSize defChunkSize, chunks = []}
+      logInfo $ "encrypted file to " <> tshow encPath
       pure (encPath, fdRcv, fdSnd, chunkSpecs, encSize)
-      where
-        encrypt :: ByteString -> C.SbKey -> C.CbNonce -> Int64 -> Int64 -> FilePath -> ExceptT CLIError IO ()
-        encrypt fileHdr key nonce fileSize' encSize encFile = do
-          f <- liftIO $ LB.readFile filePath
-          let f' = LB.fromStrict fileHdr <> f
-          c <- liftEither $ first (CLIError . show) $ LC.sbEncryptTailTag key nonce f' fileSize' $ encSize - authTagSize
-          liftIO $ LB.writeFile encFile c
     uploadFile :: [XFTPChunkSpec] -> TVar [Int64] -> Int64 -> ExceptT CLIError IO [SentFileChunk]
     uploadFile chunks uploadedChunks encSize = do
       a <- atomically $ newXFTPAgent defaultXFTPClientAgentConfig
@@ -274,32 +317,32 @@ cliSendFile SendOptions {filePath, outputDir, numRecipients, xftpServers, retryC
       let xftpSrvs = fromMaybe defaultXFTPServers (nonEmpty xftpServers)
       srvs <- liftIO $ replicateM (length chunks) $ getXFTPServer gen xftpSrvs
       let thd3 (_, _, x) = x
-          chunks' = groupBy ((==) `on` thd3) $ sortOn thd3 $ zip3 [1 ..] chunks srvs
+          chunks' = groupAllOn thd3 $ zip3 [1 ..] chunks srvs
       -- TODO shuffle/unshuffle chunks
       -- the reason we don't do pooled downloads here within one server is that http2 library doesn't handle cleint concurrency, even though
       -- upload doesn't allow other requests within the same client until complete (but download does allow).
+      logInfo $ "uploading " <> tshow (length chunks) <> " chunks..."
       map snd . sortOn fst . concat <$> pooledForConcurrentlyN 16 chunks' (mapM $ uploadFileChunk a)
       where
         uploadFileChunk :: XFTPClientAgent -> (Int, XFTPChunkSpec, XFTPServerWithAuth) -> ExceptT CLIError IO (Int, SentFileChunk)
         uploadFileChunk a (chunkNo, chunkSpec@XFTPChunkSpec {chunkSize}, ProtoServerWithAuth xftpServer auth) = do
+          logInfo $ "uploading chunk " <> tshow chunkNo <> " to " <> showServer xftpServer <> "..."
           (sndKey, spKey) <- liftIO $ C.generateSignatureKeyPair C.SEd25519
           rKeys <- liftIO $ L.fromList <$> replicateM numRecipients (C.generateSignatureKeyPair C.SEd25519)
-          chInfo@FileInfo {digest} <- liftIO $ getChunkInfo sndKey chunkSpec
+          digest <- liftIO $ getChunkDigest chunkSpec
+          let ch = FileInfo {sndKey, size = fromIntegral chunkSize, digest}
           c <- withRetry retryCount $ getXFTPServerClient a xftpServer
-          (sndId, rIds) <- withRetry retryCount $ createXFTPChunk c spKey chInfo (L.map fst rKeys) auth
-          withRetry retryCount $ uploadXFTPChunk c spKey sndId chunkSpec
+          (sndId, rIds) <- withRetry retryCount $ createXFTPChunk c spKey ch (L.map fst rKeys) auth
+          withReconnect a xftpServer retryCount $ \c' -> uploadXFTPChunk c' spKey sndId chunkSpec
+          logInfo $ "uploaded chunk " <> tshow chunkNo
           uploaded <- atomically . stateTVar uploadedChunks $ \cs ->
             let cs' = fromIntegral chunkSize : cs in (sum cs', cs')
-          liftIO $ printProgress "Uploaded" uploaded encSize
+          liftIO $ do
+            notifyProgress uploaded encSize
+            when verbose $ putStrLn ""
           let recipients = L.toList $ L.map ChunkReplicaId rIds `L.zip` L.map snd rKeys
               replicas = [SentFileChunkReplica {server = xftpServer, recipients}]
           pure (chunkNo, SentFileChunk {chunkNo, sndId, sndPrivateKey = spKey, chunkSize = FileSize $ fromIntegral chunkSize, digest = FileDigest digest, replicas})
-        getChunkInfo :: SndPublicVerifyKey -> XFTPChunkSpec -> IO FileInfo
-        getChunkInfo sndKey XFTPChunkSpec {filePath = chunkPath, chunkOffset, chunkSize} =
-          withFile chunkPath ReadMode $ \h -> do
-            hSeek h AbsoluteSeek $ fromIntegral chunkOffset
-            digest <- LC.sha512Hash <$> LB.hGet h (fromIntegral chunkSize)
-            pure FileInfo {sndKey, size = fromIntegral chunkSize, digest}
         getXFTPServer :: TVar StdGen -> NonEmpty XFTPServerWithAuth -> IO XFTPServerWithAuth
         getXFTPServer gen = \case
           srv :| [] -> pure srv
@@ -309,8 +352,8 @@ cliSendFile SendOptions {filePath, outputDir, numRecipients, xftpServers, retryC
     -- M chunks, R replicas, N recipients
     -- rcvReplicas: M[SentFileChunk] -> M * R * N [SentRecipientReplica]
     -- rcvChunks: M * R * N [SentRecipientReplica] -> N[ M[FileChunk] ]
-    createRcvFileDescriptions :: FileDescription 'FPRecipient -> [SentFileChunk] -> [FileDescription 'FPRecipient]
-    createRcvFileDescriptions fd sentChunks = map (\chunks -> (fd :: (FileDescription 'FPRecipient)) {chunks}) rcvChunks
+    createRcvFileDescriptions :: FileDescription 'FRecipient -> [SentFileChunk] -> [FileDescription 'FRecipient]
+    createRcvFileDescriptions fd sentChunks = map (\chunks -> (fd :: (FileDescription 'FRecipient)) {chunks}) rcvChunks
       where
         rcvReplicas :: [SentRecipientReplica]
         rcvReplicas =
@@ -326,7 +369,7 @@ cliSendFile SendOptions {filePath, outputDir, numRecipients, xftpServers, retryC
         rcvChunks :: [[FileChunk]]
         rcvChunks = map (sortChunks . M.elems) $ M.elems $ foldl' addRcvChunk M.empty rcvReplicas
         sortChunks :: [FileChunk] -> [FileChunk]
-        sortChunks = map reverseReplicas . sortOn (chunkNo :: FileChunk -> Int)
+        sortChunks = map reverseReplicas . sortOn (\c -> c.chunkNo)
         reverseReplicas ch@FileChunk {replicas} = (ch :: FileChunk) {replicas = reverse replicas}
         addRcvChunk :: Map Int (Map Int FileChunk) -> SentRecipientReplica -> Map Int (Map Int FileChunk)
         addRcvChunk m SentRecipientReplica {chunkNo, server, rcvNo, replicaId, replicaKey, digest, chunkSize} =
@@ -341,7 +384,7 @@ cliSendFile SendOptions {filePath, outputDir, numRecipients, xftpServers, retryC
               Just ch@FileChunk {replicas} -> ch {replicas = replica : replicas}
               _ -> FileChunk {chunkNo, digest, chunkSize, replicas = [replica]}
             replica = FileChunkReplica {server, replicaId, replicaKey}
-    createSndFileDescription :: FileDescription 'FPSender -> [SentFileChunk] -> FileDescription 'FPSender
+    createSndFileDescription :: FileDescription 'FSender -> [SentFileChunk] -> FileDescription 'FSender
     createSndFileDescription fd sentChunks = fd {chunks = sndChunks}
       where
         sndChunks :: [FileChunk]
@@ -356,7 +399,7 @@ cliSendFile SendOptions {filePath, outputDir, numRecipients, xftpServers, retryC
         sndReplicas :: [SentFileChunkReplica] -> ChunkReplicaId -> C.APrivateSignKey -> [FileChunkReplica]
         sndReplicas [] _ _ = []
         sndReplicas (SentFileChunkReplica {server} : _) replicaId replicaKey = [FileChunkReplica {server, replicaId, replicaKey}]
-    writeFileDescriptions :: String -> [FileDescription 'FPRecipient] -> FileDescription 'FPSender -> IO ([FilePath], FilePath)
+    writeFileDescriptions :: String -> [FileDescription 'FRecipient] -> FileDescription 'FSender -> IO ([FilePath], FilePath)
     writeFileDescriptions fileName fdRcvs fdSnd = do
       outDir <- uniqueCombine (fromMaybe "." outputDir) (fileName <> ".xftp")
       createDirectoryIfMissing True outDir
@@ -368,66 +411,58 @@ cliSendFile SendOptions {filePath, outputDir, numRecipients, xftpServers, retryC
       B.writeFile fdSndPath $ strEncode fdSnd
       pure (fdRcvPaths, fdSndPath)
 
+getChunkDigest :: XFTPChunkSpec -> IO ByteString
+getChunkDigest XFTPChunkSpec {filePath = chunkPath, chunkOffset, chunkSize} =
+  withFile chunkPath ReadMode $ \h -> do
+    hSeek h AbsoluteSeek $ fromIntegral chunkOffset
+    LC.sha256Hash <$> LB.hGet h (fromIntegral chunkSize)
+
 cliReceiveFile :: ReceiveOptions -> ExceptT CLIError IO ()
-cliReceiveFile ReceiveOptions {fileDescription, filePath, retryCount, tempPath} =
-  getFileDescription' fileDescription >>= receiveFile
+cliReceiveFile ReceiveOptions {fileDescription, filePath, retryCount, tempPath, verbose, yes} =
+  getFileDescription' fileDescription >>= receive
   where
-    receiveFile :: ValidFileDescription 'FPRecipient -> ExceptT CLIError IO ()
-    receiveFile (ValidFileDescription FileDescription {size, digest, key, nonce, chunks}) = do
+    receive :: ValidFileDescription 'FRecipient -> ExceptT CLIError IO ()
+    receive (ValidFileDescription FileDescription {size, digest, key, nonce, chunks}) = do
       encPath <- getEncPath tempPath "xftp"
       createDirectory encPath
       a <- atomically $ newXFTPAgent defaultXFTPClientAgentConfig
       liftIO $ printNoNewLine "Downloading file..."
       downloadedChunks <- newTVarIO []
-      let srv FileChunk {replicas} = server (head replicas :: FileChunkReplica)
-          srvChunks = groupBy ((==) `on` srv) $ sortOn srv chunks
+      let srv FileChunk {replicas} = (head replicas).server
+          srvChunks = groupAllOn srv chunks
       chunkPaths <- map snd . sortOn fst . concat <$> pooledForConcurrentlyN 16 srvChunks (mapM $ downloadFileChunk a encPath size downloadedChunks)
       encDigest <- liftIO $ LC.sha512Hash <$> readChunks chunkPaths
       when (encDigest /= unFileDigest digest) $ throwError $ CLIError "File digest mismatch"
       encSize <- liftIO $ foldM (\s path -> (s +) . fromIntegral <$> getFileSize path) 0 chunkPaths
       when (FileSize encSize /= size) $ throwError $ CLIError "File size mismatch"
-      path <- decryptFile encSize chunkPaths key nonce
+      liftIO $ printNoNewLine "Decrypting file..."
+      path <- withExceptT cliCryptoError $ decryptChunks encSize chunkPaths key nonce getFilePath
       forM_ chunks $ acknowledgeFileChunk a
       whenM (doesPathExist encPath) $ removeDirectoryRecursive encPath
-      liftIO $ printNoNewLine $ "File downloaded: " <> path
-      liftIO $ putStrLn "\nFile description can't be used again"
+      liftIO $ do
+        printNoNewLine $ "File downloaded: " <> path
+        removeFD yes fileDescription
     downloadFileChunk :: XFTPClientAgent -> FilePath -> FileSize Int64 -> TVar [Int64] -> FileChunk -> ExceptT CLIError IO (Int, FilePath)
     downloadFileChunk a encPath (FileSize encSize) downloadedChunks FileChunk {chunkNo, chunkSize, digest, replicas = replica : _} = do
       let FileChunkReplica {server, replicaId, replicaKey} = replica
+      logInfo $ "downloading chunk " <> tshow chunkNo <> " from " <> showServer server <> "..."
       chunkPath <- uniqueCombine encPath $ show chunkNo
-      c <- withRetry retryCount $ getXFTPServerClient a server
       let chunkSpec = XFTPRcvChunkSpec chunkPath (unFileSize chunkSize) (unFileDigest digest)
-      withRetry retryCount $ downloadXFTPChunk c replicaKey (unChunkReplicaId replicaId) chunkSpec
+      withReconnect a server retryCount $ \c -> downloadXFTPChunk c replicaKey (unChunkReplicaId replicaId) chunkSpec
+      logInfo $ "downloaded chunk " <> tshow chunkNo <> " to " <> T.pack chunkPath
       downloaded <- atomically . stateTVar downloadedChunks $ \cs ->
         let cs' = fromIntegral (unFileSize chunkSize) : cs in (sum cs', cs')
-      liftIO $ printProgress "Downloaded" downloaded encSize
+      liftIO $ do
+        printProgress "Downloaded" downloaded encSize
+        when verbose $ putStrLn ""
       pure (chunkNo, chunkPath)
     downloadFileChunk _ _ _ _ _ = throwError $ CLIError "chunk has no replicas"
-    decryptFile :: Int64 -> [FilePath] -> C.SbKey -> C.CbNonce -> ExceptT CLIError IO FilePath
-    decryptFile encSize chunkPaths key nonce = do
-      (authOk, f) <- liftEither . first (CLIError . show) . LC.sbDecryptTailTag key nonce (encSize - authTagSize) =<< liftIO (readChunks chunkPaths)
-      let (fileHdr, f') = LB.splitAt 1024 f
-      -- withFile encPath ReadMode $ \r -> do
-      --   fileHdr <- liftIO $ B.hGet r 1024
-      case A.parse smpP $ LB.toStrict fileHdr of
-        A.Fail _ _ e -> throwError $ CLIError $ "Invalid file header: " <> e
-        A.Partial _ -> throwError $ CLIError "Invalid file header"
-        A.Done rest FileHeader {fileName} -> do
-          path <- getFilePath fileName
-          liftIO $ LB.writeFile path $ LB.fromStrict rest <> f'
-          unless authOk $ do
-            removeFile path
-            throwError $ CLIError "Error decrypting file: incorrect auth tag"
-          pure path
-    readChunks :: [FilePath] -> IO LB.ByteString
-    readChunks = foldM (\s path -> (s <>) <$> LB.readFile path) LB.empty
-    {-# NOINLINE readChunks #-}
-    getFilePath :: String -> ExceptT CLIError IO FilePath
+    getFilePath :: String -> ExceptT String IO FilePath
     getFilePath name =
       case filePath of
         Just path ->
           ifM (doesDirectoryExist path) (uniqueCombine path name) $
-            ifM (doesFileExist path) (throwError $ CLIError "File already exists") (pure path)
+            ifM (doesFileExist path) (throwError "File already exists") (pure path)
         _ -> (`uniqueCombine` name) . (</> "Downloads") =<< getHomeDirectory
     acknowledgeFileChunk :: XFTPClientAgent -> FileChunk -> ExceptT CLIError IO ()
     acknowledgeFileChunk a FileChunk {replicas = replica : _} = do
@@ -445,19 +480,21 @@ printNoNewLine s = do
   hFlush stdout
 
 cliDeleteFile :: DeleteOptions -> ExceptT CLIError IO ()
-cliDeleteFile DeleteOptions {fileDescription, retryCount} = do
+cliDeleteFile DeleteOptions {fileDescription, retryCount, yes} = do
   getFileDescription' fileDescription >>= deleteFile
   where
-    deleteFile :: ValidFileDescription 'FPSender -> ExceptT CLIError IO ()
+    deleteFile :: ValidFileDescription 'FSender -> ExceptT CLIError IO ()
     deleteFile (ValidFileDescription FileDescription {chunks}) = do
       a <- atomically $ newXFTPAgent defaultXFTPClientAgentConfig
       forM_ chunks $ deleteFileChunk a
-      liftIO $ putStrLn "File deleted"
+      liftIO $ do
+        printNoNewLine "File deleted!"
+        removeFD yes fileDescription
     deleteFileChunk :: XFTPClientAgent -> FileChunk -> ExceptT CLIError IO ()
-    deleteFileChunk a FileChunk {replicas = replica : _} = do
+    deleteFileChunk a FileChunk {chunkNo, replicas = replica : _} = do
       let FileChunkReplica {server, replicaId, replicaKey} = replica
-      c <- withRetry retryCount $ getXFTPServerClient a server
-      withRetry retryCount $ deleteXFTPChunk c replicaKey (unChunkReplicaId replicaId)
+      withReconnect a server retryCount $ \c -> deleteXFTPChunk c replicaKey (unChunkReplicaId replicaId)
+      logInfo $ "deleted chunk " <> tshow chunkNo <> " from " <> showServer server
     deleteFileChunk _ _ = throwError $ CLIError "chunk has no replicas"
 
 cliFileDescrInfo :: InfoOptions -> ExceptT CLIError IO ()
@@ -470,22 +507,21 @@ cliFileDescrInfo InfoOptions {fileDescription} = do
         putStrLn $ "File download size: " <> strEnc size
         putStrLn "File server(s):"
         forM_ replicas $ \srvReplicas -> do
-          let srv = replicaServer $ head srvReplicas
+          let srv = (head srvReplicas).server
               chSizes = map (\FileServerReplica {chunkSize = chSize_} -> unFileSize $ fromMaybe chunkSize chSize_) srvReplicas
           putStrLn $ strEnc srv <> ": " <> strEnc (FileSize $ sum chSizes)
       where
         printParty :: IO ()
         printParty = case party of
-          SRecipient -> putStrLn "Recipient file description"
-          SSender -> putStrLn "Sender file description"
+          SFRecipient -> putStrLn "Recipient file description"
+          SFSender -> putStrLn "Sender file description"
 
 strEnc :: StrEncoding a => a -> String
 strEnc = B.unpack . strEncode
 
 getFileDescription :: FilePath -> ExceptT CLIError IO AValidFileDescription
-getFileDescription path = do
-  fd <- ExceptT $ first (CLIError . ("Failed to parse file description: " <>)) . strDecode <$> B.readFile path
-  liftEither . first CLIError $ validateFileDescription fd
+getFileDescription path =
+  ExceptT $ first (CLIError . ("Failed to parse file description: " <>)) . strDecode <$> B.readFile path
 
 getFileDescription' :: FilePartyI p => FilePath -> ExceptT CLIError IO (ValidFileDescription p)
 getFileDescription' path =
@@ -493,15 +529,18 @@ getFileDescription' path =
     AVFD fd -> either (throwError . CLIError) pure $ checkParty fd
 
 prepareChunkSizes :: Int64 -> [Word32]
-prepareChunkSizes 0 = []
-prepareChunkSizes size
-  | size >= defSz = replicate (fromIntegral n1) defaultChunkSize <> prepareChunkSizes remSz
-  | size > defSz `div` 2 = [defaultChunkSize]
-  | otherwise = replicate (fromIntegral n2') smallChunkSize
+prepareChunkSizes size' = prepareSizes size'
   where
-    (n1, remSz) = size `divMod` defSz
-    n2' = let (n2, remSz2) = (size `divMod` fromIntegral smallChunkSize) in if remSz2 == 0 then n2 else n2 + 1
-    defSz = fromIntegral defaultChunkSize :: Int64
+    (smallSize, bigSize) = if size' > size34 chunkSize3 then (chunkSize2, chunkSize3) else (chunkSize1, chunkSize2)
+    size34 sz = (fromIntegral sz * 3) `div` 4
+    prepareSizes 0 = []
+    prepareSizes size
+      | size >= fromIntegral bigSize = replicate (fromIntegral n1) bigSize <> prepareSizes remSz
+      | size > size34 bigSize = [bigSize]
+      | otherwise = replicate (fromIntegral n2') smallSize
+      where
+        (n1, remSz) = size `divMod` fromIntegral bigSize
+        n2' = let (n2, remSz2) = (size `divMod` fromIntegral smallSize) in if remSz2 == 0 then n2 else n2 + 1
 
 prepareChunkSpecs :: FilePath -> [Word32] -> [XFTPChunkSpec]
 prepareChunkSpecs filePath chunkSizes = reverse . snd $ foldl' addSpec (0, []) chunkSizes
@@ -514,14 +553,12 @@ prepareChunkSpecs filePath chunkSizes = reverse . snd $ foldl' addSpec (0, []) c
 getEncPath :: MonadIO m => Maybe FilePath -> String -> m FilePath
 getEncPath path name = (`uniqueCombine` (name <> ".encrypted")) =<< maybe (liftIO getCanonicalTemporaryDirectory) pure path
 
-uniqueCombine :: MonadIO m => FilePath -> String -> m FilePath
-uniqueCombine filePath fileName = tryCombine (0 :: Int)
-  where
-    tryCombine n =
-      let (name, ext) = splitExtensions fileName
-          suffix = if n == 0 then "" else "_" <> show n
-          f = filePath </> (name <> suffix <> ext)
-       in ifM (doesPathExist f) (tryCombine $ n + 1) (pure f)
+withReconnect :: Show e => XFTPClientAgent -> XFTPServer -> Int -> (XFTPClient -> ExceptT e IO a) -> ExceptT CLIError IO a
+withReconnect a srv n run = withRetry n $ do
+  c <- withRetry n $ getXFTPServerClient a srv
+  withExceptT (CLIError . show) (run c) `catchError` \e -> do
+    liftIO $ closeXFTPServerClient a srv
+    throwError e
 
 withRetry :: Show e => Int -> ExceptT e IO a -> ExceptT CLIError IO a
 withRetry retryCount = withRetry' retryCount . withExceptT (CLIError . show)
@@ -529,7 +566,30 @@ withRetry retryCount = withRetry' retryCount . withExceptT (CLIError . show)
     withRetry' :: Int -> ExceptT CLIError IO a -> ExceptT CLIError IO a
     withRetry' 0 _ = throwError $ CLIError "internal: no retry attempts"
     withRetry' 1 a = a
-    withRetry' n a = a `catchError` \_ -> withRetry' (n - 1) a
+    withRetry' n a =
+      a `catchError` \e -> do
+        logWarn ("retrying: " <> tshow e)
+        withRetry' (n - 1) a
+
+removeFD :: Bool -> FilePath -> IO ()
+removeFD yes fd
+  | yes = do
+    removeFile fd
+    putStrLn $ "\nFile description " <> fd <> " is deleted."
+  | otherwise = do
+    y <- liftIO . getConfirmation $ "\nFile description " <> fd <> " can't be used again. Delete it"
+    when y $ removeFile fd
+
+getConfirmation :: String -> IO Bool
+getConfirmation prompt = do
+  putStr $ prompt <> " (Y/n): "
+  hFlush stdout
+  s <- getLine
+  case map toLower s of
+    "y" -> pure True
+    "" -> pure True
+    "n" -> pure False
+    _ -> getConfirmation prompt
 
 cliRandomFile :: RandomFileOptions -> IO ()
 cliRandomFile RandomFileOptions {filePath, fileSize = FileSize size} = do
@@ -537,6 +597,7 @@ cliRandomFile RandomFileOptions {filePath, fileSize = FileSize size} = do
   putStrLn $ "File created: " <> filePath
   where
     saveRandomFile h sz = do
-      bytes <- getRandomBytes $ min mb sz
+      bytes <- getRandomBytes $ fromIntegral $ min mb' sz
       B.hPut h bytes
-      when (sz > mb) $ saveRandomFile h (sz - mb)
+      when (sz > mb') $ saveRandomFile h (sz - mb')
+    mb' = mb 1

src/Simplex/FileTransfer/Client/Presets.hs

@@ -0,0 +1,17 @@
+{-# LANGUAGE OverloadedLists #-}
+{-# LANGUAGE OverloadedStrings #-}
+
+module Simplex.FileTransfer.Client.Presets where
+
+import Data.List.NonEmpty (NonEmpty)
+import Simplex.Messaging.Protocol (XFTPServerWithAuth)
+
+defaultXFTPServers :: NonEmpty XFTPServerWithAuth
+defaultXFTPServers =
+  [ "xftp://da1aH3nOT-9G8lV7bWamhxpDYdJ1xmW7j3JpGaDR5Ug=@xftp1.simplex.im,blisztokwh6alt5oem45f2eksm2xdowxszmhjesntcyolmhutoon7sid.onion",
+    "xftp://5vog2Imy1ExJB_7zDZrkV1KDWi96jYFyy9CL6fndBVw=@xftp2.simplex.im,jk6jybnel5hin2am5omd7g3hyvb4tfkyl7ea4vx5ldi7gpvz5ogqtcqd.onion",
+    "xftp://PYa32DdYNFWi0uZZOprWQoQpIk5qyjRJ3EF7bVpbsn8=@xftp3.simplex.im,pqhchr4bpkzef5wra4hnmzvppn5j5mjrpzkh5ixx6mhylnxxd6lmwnad.onion",
+    "xftp://k_GgQl40UZVV0Y4BX9ZTyMVqX5ZewcLW0waQIl7AYDE=@xftp4.simplex.im,q2lrjgiyo2efyweksavwxh3dlsrxetaxjztde2x5nateugrtrwzvmdid.onion",
+    "xftp://-bIo6o8wuVc4wpZkZD3tH-rCeYaeER_0lz1ffQcSJDs=@xftp5.simplex.im,2kikdbdhlrluburwt6q6rnoxvezcm2ifx2hj463jlunkeftlzm7hf3qd.onion",
+    "xftp://6nSvtY9pJn6PXWTAIMNl95E1Kk1vD7FM2TeOA64CFLg=@xftp6.simplex.im,tg3fmu6houq7vfqlsipm2qqzhtpgxesnuydqozx3khojxydhs53sbbyd.onion"
+  ]

src/Simplex/FileTransfer/Crypto.hs

@@ -0,0 +1,116 @@
+{-# LANGUAGE BangPatterns #-}
+{-# LANGUAGE DeriveAnyClass #-}
+{-# LANGUAGE NamedFieldPuns #-}
+{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE ScopedTypeVariables #-}
+
+module Simplex.FileTransfer.Crypto where
+
+import Control.Monad
+import Control.Monad.Except
+import qualified Data.Attoparsec.ByteString.Char8 as A
+import Data.Bifunctor (first)
+import qualified Data.ByteArray as BA
+import Data.ByteString.Char8 (ByteString)
+import qualified Data.ByteString.Char8 as B
+import qualified Data.ByteString.Lazy.Char8 as LB
+import Data.Int (Int64)
+import Simplex.FileTransfer.Types (FileHeader (..), authTagSize)
+import qualified Simplex.Messaging.Crypto as C
+import Simplex.Messaging.Crypto.Lazy (LazyByteString)
+import qualified Simplex.Messaging.Crypto.Lazy as LC
+import Simplex.Messaging.Encoding
+import Simplex.Messaging.Util (liftEitherWith)
+import UnliftIO
+import UnliftIO.Directory (removeFile)
+
+encryptFile :: FilePath -> ByteString -> C.SbKey -> C.CbNonce -> Int64 -> Int64 -> FilePath -> ExceptT FTCryptoError IO ()
+encryptFile filePath fileHdr key nonce fileSize' encSize encFile = do
+  sb <- liftEitherWith FTCECryptoError $ LC.sbInit key nonce
+  withFile filePath ReadMode $ \r -> withFile encFile WriteMode $ \w -> do
+    let lenStr = smpEncode fileSize'
+        (hdr, !sb') = LC.sbEncryptChunk sb $ lenStr <> fileHdr
+        padLen = encSize - authTagSize - fileSize' - 8
+    liftIO $ B.hPut w hdr
+    sb2 <- encryptChunks r w (sb', fileSize' - fromIntegral (B.length fileHdr))
+    sb3 <- encryptPad w (sb2, padLen)
+    let tag = BA.convert $ LC.sbAuth sb3
+    liftIO $ B.hPut w tag
+  where
+    encryptChunks r = encryptChunks_ $ liftIO . B.hGet r . fromIntegral
+    encryptPad = encryptChunks_ $ \sz -> pure $ B.replicate (fromIntegral sz) '#'
+    encryptChunks_ :: (Int64 -> IO ByteString) -> Handle -> (LC.SbState, Int64) -> ExceptT FTCryptoError IO LC.SbState
+    encryptChunks_ get w (!sb, !len)
+      | len == 0 = pure sb
+      | otherwise = do
+        let chSize = min len 65536
+        ch <- liftIO $ get chSize
+        when (B.length ch /= fromIntegral chSize) $ throwError $ FTCEFileIOError "encrypting file: unexpected EOF"
+        let (ch', sb') = LC.sbEncryptChunk sb ch
+        liftIO $ B.hPut w ch'
+        encryptChunks_ get w (sb', len - chSize)
+
+decryptChunks :: Int64 -> [FilePath] -> C.SbKey -> C.CbNonce -> (String -> ExceptT String IO String) -> ExceptT FTCryptoError IO FilePath
+decryptChunks _ [] _ _ _ = throwError $ FTCEInvalidHeader "empty"
+decryptChunks encSize (chPath : chPaths) key nonce getFilePath = case reverse chPaths of
+  [] -> do
+    (!authOk, !f) <- liftEither . first FTCECryptoError . LC.sbDecryptTailTag key nonce (encSize - authTagSize) =<< liftIO (LB.readFile chPath)
+    unless authOk $ throwError FTCEInvalidAuthTag
+    (FileHeader {fileName}, !f') <- parseFileHeader f
+    path <- withExceptT FTCEFileIOError $ getFilePath fileName
+    liftIO $ LB.writeFile path f'
+    pure path
+  lastPath : chPaths' -> do
+    (state, expectedLen, ch) <- decryptFirstChunk
+    (FileHeader {fileName}, ch') <- parseFileHeader ch
+    path <- withExceptT FTCEFileIOError $ getFilePath fileName
+    authOk <- liftIO . withFile path WriteMode $ \h -> do
+      liftIO $ LB.hPut h ch'
+      state' <- foldM (decryptChunk h) state $ reverse chPaths'
+      decryptLastChunk h state' expectedLen
+    unless authOk $ do
+      removeFile path
+      throwError FTCEInvalidAuthTag
+    pure path
+    where
+      decryptFirstChunk = do
+        sb <- liftEitherWith FTCECryptoError $ LC.sbInit key nonce
+        ch <- liftIO $ LB.readFile chPath
+        let (ch1, !sb') = LC.sbDecryptChunkLazy sb ch
+        (!expectedLen, ch2) <- liftEitherWith FTCECryptoError $ LC.splitLen ch1
+        let len1 = LB.length ch2
+        pure ((sb', len1), expectedLen, ch2)
+      decryptChunk h (!sb, !len) chPth = do
+        ch <- LB.readFile chPth
+        let len' = len + LB.length ch
+            (ch', sb') = LC.sbDecryptChunkLazy sb ch
+        LB.hPut h ch'
+        pure (sb', len')
+      decryptLastChunk h (!sb, !len) expectedLen = do
+        ch <- LB.readFile lastPath
+        let (ch1, tag') = LB.splitAt (LB.length ch - authTagSize) ch
+            tag'' = LB.toStrict tag'
+            (ch2, sb') = LC.sbDecryptChunkLazy sb ch1
+            len' = len + LB.length ch2
+            ch3 = LB.take (LB.length ch2 - len' + expectedLen) ch2
+            tag :: ByteString = BA.convert (LC.sbAuth sb')
+        LB.hPut h ch3
+        pure $ B.length tag'' == 16 && BA.constEq tag'' tag
+  where
+    parseFileHeader :: LazyByteString -> ExceptT FTCryptoError IO (FileHeader, LazyByteString)
+    parseFileHeader s = do
+      let (hdrStr, s') = LB.splitAt 1024 s
+      case A.parse smpP $ LB.toStrict hdrStr of
+        A.Fail _ _ e -> throwError $ FTCEInvalidHeader e
+        A.Partial _ -> throwError $ FTCEInvalidHeader "incomplete"
+        A.Done rest hdr -> pure (hdr, LB.fromStrict rest <> s')
+
+readChunks :: [FilePath] -> IO LB.ByteString
+readChunks = foldM (\s path -> (s <>) <$> LB.readFile path) ""
+
+data FTCryptoError
+  = FTCECryptoError C.CryptoError
+  | FTCEInvalidHeader String
+  | FTCEInvalidAuthTag
+  | FTCEFileIOError String
+  deriving (Show, Eq, Exception)

src/Simplex/FileTransfer/Description.hs

@@ -4,12 +4,14 @@
 {-# LANGUAGE DuplicateRecordFields #-}
 {-# LANGUAGE GADTs #-}
 {-# LANGUAGE KindSignatures #-}
-{-# LANGUAGE LambdaCase #-}
 {-# LANGUAGE NamedFieldPuns #-}
+{-# LANGUAGE OverloadedRecordDot #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE PatternSynonyms #-}
 {-# LANGUAGE ScopedTypeVariables #-}
 
+{-# OPTIONS_GHC -fno-warn-ambiguous-fields #-}
+
 module Simplex.FileTransfer.Description
   ( FileDescription (..),
     AFileDescription (..),
@@ -26,7 +28,7 @@ module Simplex.FileTransfer.Description
     YAMLServerReplicas (..), -- for tests
     validateFileDescription,
     groupReplicasByServer,
-    replicaServer,
+    fdSeparator,
     kb,
     mb,
     gb,
@@ -42,22 +44,23 @@ import qualified Data.Attoparsec.ByteString.Char8 as A
 import Data.Bifunctor (first)
 import Data.ByteString.Char8 (ByteString)
 import qualified Data.ByteString.Char8 as B
-import Data.Function (on)
 import Data.Int (Int64)
-import Data.List (foldl', groupBy, sortOn)
+import Data.List (foldl', sortOn)
 import Data.Map (Map)
 import qualified Data.Map as M
 import Data.Maybe (fromMaybe)
 import Data.String
 import Data.Word (Word32)
 import qualified Data.Yaml as Y
+import Database.SQLite.Simple.FromField (FromField (..))
+import Database.SQLite.Simple.ToField (ToField (..))
 import GHC.Generics (Generic)
 import Simplex.FileTransfer.Protocol
 import qualified Simplex.Messaging.Crypto as C
 import Simplex.Messaging.Encoding.String
 import Simplex.Messaging.Parsers (parseAll)
 import Simplex.Messaging.Protocol (XFTPServer)
-import Simplex.Messaging.Util (bshow, (<$?>))
+import Simplex.Messaging.Util (bshow, groupAllOn, (<$?>))
 
 data FileDescription (p :: FileParty) = FileDescription
   { party :: SFileParty p,
@@ -73,6 +76,7 @@ data FileDescription (p :: FileParty) = FileDescription
 data AFileDescription = forall p. FilePartyI p => AFD (FileDescription p)
 
 newtype ValidFileDescription p = ValidFD (FileDescription p)
+  deriving (Eq, Show)
 
 pattern ValidFileDescription :: FileDescription p -> ValidFileDescription p
 pattern ValidFileDescription fd = ValidFD fd
@@ -81,6 +85,9 @@ pattern ValidFileDescription fd = ValidFD fd
 
 data AValidFileDescription = forall p. FilePartyI p => AVFD (ValidFileDescription p)
 
+fdSeparator :: IsString s => s
+fdSeparator = "################################\n"
+
 newtype FileDigest = FileDigest {unFileDigest :: ByteString}
   deriving (Eq, Show)
 
@@ -96,6 +103,10 @@ instance ToJSON FileDigest where
   toJSON = strToJSON
   toEncoding = strToJEncoding
 
+instance FromField FileDigest where fromField f = FileDigest <$> fromField f
+
+instance ToField FileDigest where toField (FileDigest s) = toField s
+
 data FileChunk = FileChunk
   { chunkNo :: Int,
     chunkSize :: FileSize Word32,
@@ -125,6 +136,10 @@ instance ToJSON ChunkReplicaId where
   toJSON = strToJSON
   toEncoding = strToJEncoding
 
+instance FromField ChunkReplicaId where fromField f = ChunkReplicaId <$> fromField f
+
+instance ToField ChunkReplicaId where toField (ChunkReplicaId s) = toField s
+
 data YAMLFileDescription = YAMLFileDescription
   { party :: FileParty,
     size :: String,
@@ -160,6 +175,16 @@ data FileServerReplica = FileServerReplica
   }
   deriving (Show)
 
+instance FilePartyI p => StrEncoding (ValidFileDescription p) where
+  strEncode (ValidFD fd) = strEncode fd
+  strDecode s = strDecode s >>= (\(AVFD fd) -> checkParty fd)
+  strP = strDecode <$?> A.takeByteString
+
+instance StrEncoding AValidFileDescription where
+  strEncode (AVFD fd) = strEncode fd
+  strDecode = (\(AFD fd) -> AVFD <$> validateFileDescription fd) <=< strDecode
+  strP = strDecode <$?> A.takeByteString
+
 instance FilePartyI p => StrEncoding (FileDescription p) where
   strEncode = Y.encode . encodeFileDescription
   strDecode s = strDecode s >>= (\(AFD fd) -> checkParty fd)
@@ -170,15 +195,14 @@ instance StrEncoding AFileDescription where
   strDecode = decodeFileDescription <=< first show . Y.decodeEither'
   strP = strDecode <$?> A.takeByteString
 
-validateFileDescription :: AFileDescription -> Either String AValidFileDescription
-validateFileDescription = \case
-  AFD fd@FileDescription {size, chunks}
-    | chunkNos /= [1 .. length chunks] -> Left "chunk numbers are not sequential"
-    | chunksSize chunks /= unFileSize size -> Left "chunks total size is different than file size"
-    | otherwise -> Right $ AVFD (ValidFD fd)
-    where
-      chunkNos = map (chunkNo :: FileChunk -> Int) chunks
-      chunksSize = fromIntegral . foldl' (\s FileChunk {chunkSize} -> s + unFileSize chunkSize) 0
+validateFileDescription :: FileDescription p -> Either String (ValidFileDescription p)
+validateFileDescription fd@FileDescription {size, chunks}
+  | chunkNos /= [1 .. length chunks] = Left "chunk numbers are not sequential"
+  | chunksSize chunks /= unFileSize size = Left "chunks total size is different than file size"
+  | otherwise = Right $ ValidFD fd
+  where
+    chunkNos = map (\c -> c.chunkNo) chunks
+    chunksSize = fromIntegral . foldl' (\s FileChunk {chunkSize} -> s + unFileSize chunkSize) 0
 
 encodeFileDescription :: FileDescription p -> YAMLFileDescription
 encodeFileDescription FileDescription {party, size, digest, key, nonce, chunkSize, chunks} =
@@ -208,29 +232,34 @@ instance (Integral a, Show a) => StrEncoding (FileSize a) where
   strP =
     FileSize
       <$> A.choice
-        [ (gb *) <$> A.decimal <* "gb",
-          (mb *) <$> A.decimal <* "mb",
-          (kb *) <$> A.decimal <* "kb",
+        [ gb <$> A.decimal <* "gb",
+          mb <$> A.decimal <* "mb",
+          kb <$> A.decimal <* "kb",
           A.decimal
         ]
 
-kb :: Integral a => a
-kb = 1024
+kb :: Integral a => a -> a
+kb n = 1024 * n
+{-# INLINE kb #-}
 
-mb :: Integral a => a
-mb = 1024 * kb
+mb :: Integral a => a -> a
+mb n = 1024 * kb n
+{-# INLINE mb #-}
 
-gb :: Integral a => a
-gb = 1024 * mb
+gb :: Integral a => a -> a
+gb n = 1024 * mb n
+{-# INLINE gb #-}
 
 instance (Integral a, Show a) => IsString (FileSize a) where
   fromString = either error id . strDecode . B.pack
 
+instance (FromField a) => FromField (FileSize a) where fromField f = FileSize <$> fromField f
+
+instance (ToField a) => ToField (FileSize a) where toField (FileSize s) = toField s
+
 groupReplicasByServer :: FileSize Word32 -> [FileChunk] -> [[FileServerReplica]]
 groupReplicasByServer defChunkSize =
-  groupBy ((==) `on` replicaServer)
-    . sortOn replicaServer
-    . unfoldChunksToReplicas defChunkSize
+  groupAllOn (\r -> r.server) . unfoldChunksToReplicas defChunkSize
 
 encodeFileReplicas :: FileSize Word32 -> [FileChunk] -> [YAMLServerReplicas]
 encodeFileReplicas defChunkSize =
@@ -238,13 +267,10 @@ encodeFileReplicas defChunkSize =
   where
     encodeServerReplicas fs =
       YAMLServerReplicas
-        { server = replicaServer $ head fs, -- groupBy guarantees that fs is not empty
+        { server = (head fs).server, -- groupAllOn guarantees that fs is not empty
           chunks = map (B.unpack . encodeServerReplica) fs
         }
 
-replicaServer :: FileServerReplica -> XFTPServer
-replicaServer = server
-
 encodeServerReplica :: FileServerReplica -> ByteString
 encodeServerReplica FileServerReplica {chunkNo, replicaId, replicaKey, digest, chunkSize} =
   bshow chunkNo
@@ -296,7 +322,7 @@ foldReplicasToChunks :: FileSize Word32 -> [FileServerReplica] -> Either String
 foldReplicasToChunks defChunkSize fs = do
   sd <- foldSizesDigests fs
   -- TODO validate (check that chunks match) or in separate function
-  sortOn (chunkNo :: FileChunk -> Int) . map reverseReplicas . M.elems <$> foldChunks sd fs
+  sortOn (\c -> c.chunkNo) . map reverseReplicas . M.elems <$> foldChunks sd fs
   where
     foldSizesDigests :: [FileServerReplica] -> Either String (Map Int (FileSize Word32), Map Int FileDigest)
     foldSizesDigests = foldl' addSizeDigest $ Right (M.empty, M.empty)

src/Simplex/FileTransfer/Protocol.hs

@@ -13,6 +13,7 @@
 
 module Simplex.FileTransfer.Protocol where
 
+import Control.Applicative ((<|>))
 import Data.Aeson (FromJSON, ToJSON)
 import qualified Data.Aeson as J
 import qualified Data.Attoparsec.ByteString.Char8 as A
@@ -25,6 +26,7 @@ import Data.Maybe (isNothing)
 import Data.Type.Equality
 import Data.Word (Word32)
 import GHC.Generics (Generic)
+import Generic.Random (genericArbitraryU)
 import qualified Simplex.Messaging.Crypto as C
 import Simplex.Messaging.Encoding
 import Simplex.Messaging.Encoding.String
@@ -55,8 +57,9 @@ import Simplex.Messaging.Protocol
     _smpP,
   )
 import Simplex.Messaging.Transport (SessionId, TransportError (..))
-import Simplex.Messaging.Util ((<$?>))
+import Simplex.Messaging.Util (bshow, (<$?>))
 import Simplex.Messaging.Version
+import Test.QuickCheck (Arbitrary (..))
 
 currentXFTPVersion :: Version
 currentXFTPVersion = 1
@@ -65,23 +68,23 @@ xftpBlockSize :: Int
 xftpBlockSize = 16384
 
 -- | File protocol clients
-data FileParty = FPRecipient | FPSender
+data FileParty = FRecipient | FSender
   deriving (Eq, Show, Generic)
 
 instance FromJSON FileParty where
-  parseJSON = J.genericParseJSON . enumJSON $ dropPrefix "FP"
+  parseJSON = J.genericParseJSON . enumJSON $ dropPrefix "F"
 
 instance ToJSON FileParty where
-  toJSON = J.genericToJSON . enumJSON $ dropPrefix "FP"
-  toEncoding = J.genericToEncoding . enumJSON $ dropPrefix "FP"
+  toJSON = J.genericToJSON . enumJSON $ dropPrefix "F"
+  toEncoding = J.genericToEncoding . enumJSON $ dropPrefix "F"
 
 data SFileParty :: FileParty -> Type where
-  SRecipient :: SFileParty FPRecipient
-  SSender :: SFileParty FPSender
+  SFRecipient :: SFileParty FRecipient
+  SFSender :: SFileParty FSender
 
 instance TestEquality SFileParty where
-  testEquality SRecipient SRecipient = Just Refl
-  testEquality SSender SSender = Just Refl
+  testEquality SFRecipient SFRecipient = Just Refl
+  testEquality SFSender SFSender = Just Refl
   testEquality _ _ = Nothing
 
 deriving instance Eq (SFileParty p)
@@ -92,28 +95,28 @@ data AFileParty = forall p. FilePartyI p => AFP (SFileParty p)
 
 toFileParty :: SFileParty p -> FileParty
 toFileParty = \case
-  SRecipient -> FPRecipient
-  SSender -> FPSender
+  SFRecipient -> FRecipient
+  SFSender -> FSender
 
 aFileParty :: FileParty -> AFileParty
 aFileParty = \case
-  FPRecipient -> AFP SRecipient
-  FPSender -> AFP SSender
+  FRecipient -> AFP SFRecipient
+  FSender -> AFP SFSender
 
 class FilePartyI (p :: FileParty) where sFileParty :: SFileParty p
 
-instance FilePartyI FPRecipient where sFileParty = SRecipient
+instance FilePartyI FRecipient where sFileParty = SFRecipient
 
-instance FilePartyI FPSender where sFileParty = SSender
+instance FilePartyI FSender where sFileParty = SFSender
 
 data FileCommandTag (p :: FileParty) where
-  FNEW_ :: FileCommandTag FPSender
-  FADD_ :: FileCommandTag FPSender
-  FPUT_ :: FileCommandTag FPSender
-  FDEL_ :: FileCommandTag FPSender
-  FGET_ :: FileCommandTag FPRecipient
-  FACK_ :: FileCommandTag FPRecipient
-  PING_ :: FileCommandTag FPRecipient
+  FNEW_ :: FileCommandTag FSender
+  FADD_ :: FileCommandTag FSender
+  FPUT_ :: FileCommandTag FSender
+  FDEL_ :: FileCommandTag FSender
+  FGET_ :: FileCommandTag FRecipient
+  FACK_ :: FileCommandTag FRecipient
+  PING_ :: FileCommandTag FRecipient
 
 deriving instance Show (FileCommandTag p)
 
@@ -136,13 +139,13 @@ instance Encoding FileCmdTag where
 
 instance ProtocolMsgTag FileCmdTag where
   decodeTag = \case
-    "FNEW" -> Just $ FCT SSender FNEW_
-    "FADD" -> Just $ FCT SSender FADD_
-    "FPUT" -> Just $ FCT SSender FPUT_
-    "FDEL" -> Just $ FCT SSender FDEL_
-    "FGET" -> Just $ FCT SRecipient FGET_
-    "FACK" -> Just $ FCT SRecipient FACK_
-    "PING" -> Just $ FCT SRecipient PING_
+    "FNEW" -> Just $ FCT SFSender FNEW_
+    "FADD" -> Just $ FCT SFSender FADD_
+    "FPUT" -> Just $ FCT SFSender FPUT_
+    "FDEL" -> Just $ FCT SFSender FDEL_
+    "FGET" -> Just $ FCT SFRecipient FGET_
+    "FACK" -> Just $ FCT SFRecipient FACK_
+    "PING" -> Just $ FCT SFRecipient PING_
     _ -> Nothing
 
 instance FilePartyI p => ProtocolMsgTag (FileCommandTag p) where
@@ -152,19 +155,19 @@ instance Protocol XFTPErrorType FileResponse where
   type ProtoCommand FileResponse = FileCmd
   type ProtoType FileResponse = 'PXFTP
   protocolClientHandshake = ntfClientHandshake
-  protocolPing = FileCmd SRecipient PING
+  protocolPing = FileCmd SFRecipient PING
   protocolError = \case
     FRErr e -> Just e
     _ -> Nothing
 
 data FileCommand (p :: FileParty) where
-  FNEW :: FileInfo -> NonEmpty RcvPublicVerifyKey -> Maybe BasicAuth -> FileCommand FPSender
-  FADD :: NonEmpty RcvPublicVerifyKey -> FileCommand FPSender
-  FPUT :: FileCommand FPSender
-  FDEL :: FileCommand FPSender
-  FGET :: RcvPublicDhKey -> FileCommand FPRecipient
-  FACK :: FileCommand FPRecipient
-  PING :: FileCommand FPRecipient
+  FNEW :: FileInfo -> NonEmpty RcvPublicVerifyKey -> Maybe BasicAuth -> FileCommand FSender
+  FADD :: NonEmpty RcvPublicVerifyKey -> FileCommand FSender
+  FPUT :: FileCommand FSender
+  FDEL :: FileCommand FSender
+  FGET :: RcvPublicDhKey -> FileCommand FRecipient
+  FACK :: FileCommand FRecipient
+  PING :: FileCommand FRecipient
 
 deriving instance Show (FileCommand p)
 
@@ -219,14 +222,14 @@ instance ProtocolEncoding XFTPErrorType FileCmd where
   encodeProtocol _v (FileCmd _ c) = encodeProtocol _v c
 
   protocolP _v = \case
-    FCT SSender tag ->
-      FileCmd SSender <$> case tag of
+    FCT SFSender tag ->
+      FileCmd SFSender <$> case tag of
         FNEW_ -> FNEW <$> _smpP <*> smpP <*> smpP
         FADD_ -> FADD <$> _smpP
         FPUT_ -> pure FPUT
         FDEL_ -> pure FDEL
-    FCT SRecipient tag ->
-      FileCmd SRecipient <$> case tag of
+    FCT SFRecipient tag ->
+      FileCmd SFRecipient <$> case tag of
         FGET_ -> FGET <$> _smpP
         FACK_ -> pure FACK
         PING_ -> pure PING
@@ -354,6 +357,18 @@ data XFTPErrorType
     DUPLICATE_ -- not part of SMP protocol, used internally
   deriving (Eq, Generic, Read, Show)
 
+instance ToJSON XFTPErrorType where
+  toJSON = J.genericToJSON $ sumTypeJSON id
+  toEncoding = J.genericToEncoding $ sumTypeJSON id
+
+instance StrEncoding XFTPErrorType where
+  strEncode = \case
+    CMD e -> "CMD " <> bshow e
+    e -> bshow e
+  strP = "CMD " *> (CMD <$> parseRead1) <|> parseRead1
+
+instance Arbitrary XFTPErrorType where arbitrary = genericArbitraryU
+
 instance Encoding XFTPErrorType where
   smpEncode = \case
     BLOCK -> "BLOCK"

src/Simplex/FileTransfer/Server.hs

@@ -12,6 +12,7 @@
 module Simplex.FileTransfer.Server where
 
 import Control.Logger.Simple
+import Control.Monad
 import Control.Monad.Except
 import Control.Monad.IO.Unlift (MonadUnliftIO)
 import Control.Monad.Reader
@@ -22,6 +23,7 @@ import Data.ByteString.Builder (byteString)
 import Data.ByteString.Char8 (ByteString)
 import qualified Data.ByteString.Char8 as B
 import Data.Functor (($>))
+import Data.Int (Int64)
 import Data.List (intercalate)
 import Data.List.NonEmpty (NonEmpty)
 import qualified Data.List.NonEmpty as L
@@ -69,7 +71,7 @@ runXFTPServerBlocking :: TMVar Bool -> XFTPServerConfig -> IO ()
 runXFTPServerBlocking started cfg = newXFTPServerEnv cfg >>= runReaderT (xftpServer cfg started)
 
 xftpServer :: XFTPServerConfig -> TMVar Bool -> M ()
-xftpServer cfg@XFTPServerConfig {xftpPort, logTLSErrors} started = do
+xftpServer cfg@XFTPServerConfig {xftpPort, transportConfig} started = do
   restoreServerStats
   raceAny_ (runServer : expireFilesThread_ cfg <> serverStatsThread_ cfg) `finally` stopServer
   where
@@ -78,7 +80,7 @@ xftpServer cfg@XFTPServerConfig {xftpPort, logTLSErrors} started = do
       serverParams <- asks tlsServerParams
       env <- ask
       liftIO $
-        runHTTP2Server started xftpPort defaultHTTP2BufferSize serverParams logTLSErrors $ \sessionId r sendResponse -> do
+        runHTTP2Server started xftpPort defaultHTTP2BufferSize serverParams transportConfig $ \sessionId r sendResponse -> do
           reqBody <- getHTTP2Body r xftpBlockSize
           processRequest HTTP2Request {sessionId, request = r, reqBody, sendResponse} `runReaderT` env
 
@@ -96,7 +98,7 @@ xftpServer cfg@XFTPServerConfig {xftpPort, logTLSErrors} started = do
       st <- asks store
       let interval = checkInterval expCfg * 1000000
       forever $ do
-        threadDelay interval
+        liftIO $ threadDelay' interval
         old <- liftIO $ expireBeforeEpoch expCfg
         sIds <- M.keysSet <$> readTVarIO (files st)
         forM_ sIds $ \sId -> do
@@ -118,12 +120,12 @@ xftpServer cfg@XFTPServerConfig {xftpPort, logTLSErrors} started = do
       [logServerStats logStatsStartTime interval serverStatsLogFile]
     serverStatsThread_ _ = []
 
-    logServerStats :: Int -> Int -> FilePath -> M ()
+    logServerStats :: Int64 -> Int64 -> FilePath -> M ()
     logServerStats startAt logInterval statsFilePath = do
       initialDelay <- (startAt -) . fromIntegral . (`div` 1000000_000000) . diffTimeToPicoseconds . utctDayTime <$> liftIO getCurrentTime
       liftIO $ putStrLn $ "server stats log enabled: " <> statsFilePath
-      threadDelay $ 1_000_000 * (initialDelay + if initialDelay < 0 then 86_400 else 0)
-      FileServerStats {fromTime, filesCreated, fileRecipients, filesUploaded, filesDeleted, filesDownloaded, fileDownloads, fileDownloadAcks} <- asks serverStats
+      liftIO $ threadDelay' $ 1_000_000 * (initialDelay + if initialDelay < 0 then 86_400 else 0)
+      FileServerStats {fromTime, filesCreated, fileRecipients, filesUploaded, filesDeleted, filesDownloaded, fileDownloads, fileDownloadAcks, filesCount, filesSize} <- asks serverStats
       let interval = 1_000_000 * logInterval
       forever $ do
         withFile statsFilePath AppendMode $ \h -> liftIO $ do
@@ -137,6 +139,8 @@ xftpServer cfg@XFTPServerConfig {xftpPort, logTLSErrors} started = do
           files <- atomically $ periodStatCounts filesDownloaded ts
           fileDownloads' <- atomically $ swapTVar fileDownloads 0
           fileDownloadAcks' <- atomically $ swapTVar fileDownloadAcks 0
+          filesCount' <- atomically $ swapTVar filesCount 0
+          filesSize' <- atomically $ swapTVar filesSize 0
           hPutStrLn h $
             intercalate
               ","
@@ -149,9 +153,11 @@ xftpServer cfg@XFTPServerConfig {xftpPort, logTLSErrors} started = do
                 weekCount files,
                 monthCount files,
                 show fileDownloads',
-                show fileDownloadAcks'
+                show fileDownloadAcks',
+                show filesCount',
+                show filesSize'
               ]
-        threadDelay interval
+        liftIO $ threadDelay' interval
 
 data ServerFile = ServerFile
   { filePath :: FilePath,
@@ -197,8 +203,8 @@ data VerificationResult = VRVerified XFTPRequest | VRFailed
 verifyXFTPTransmission :: Maybe C.ASignature -> ByteString -> XFTPFileId -> FileCmd -> M VerificationResult
 verifyXFTPTransmission sig_ signed fId cmd =
   case cmd of
-    FileCmd SSender (FNEW file rcps auth) -> pure $ XFTPReqNew file rcps auth `verifyWith` sndKey file
-    FileCmd SRecipient PING -> pure $ VRVerified XFTPReqPing
+    FileCmd SFSender (FNEW file rcps auth) -> pure $ XFTPReqNew file rcps auth `verifyWith` sndKey file
+    FileCmd SFRecipient PING -> pure $ VRVerified XFTPReqPing
     FileCmd party _ -> verifyCmd party
   where
     verifyCmd :: SFileParty p -> M VerificationResult
@@ -213,19 +219,13 @@ verifyXFTPTransmission sig_ signed fId cmd =
 
 processXFTPRequest :: HTTP2Body -> XFTPRequest -> M (FileResponse, Maybe ServerFile)
 processXFTPRequest HTTP2Body {bodyPart} = \case
-  XFTPReqNew file rks auth -> do
-    st <- asks store
-    noFile
-      =<< ifM
-        allowNew
-        (createFile st file rks)
-        (pure $ FRErr AUTH)
+  XFTPReqNew file rks auth -> noFile =<< ifM allowNew (createFile file rks) (pure $ FRErr AUTH)
     where
       allowNew = do
         XFTPServerConfig {allowNewFiles, newFileBasicAuth} <- asks config
         pure $ allowNewFiles && maybe True ((== auth) . Just) newFileBasicAuth
   XFTPReqCmd fId fr (FileCmd _ cmd) -> case cmd of
-    FADD _rcps -> noFile FROk
+    FADD rks -> noFile =<< addRecipients fId rks
     FPUT -> noFile =<< receiveServerFile fr
     FDEL -> noFile =<< deleteServerFile fr
     FGET rDhKey -> sendServerFile fr rDhKey
@@ -236,40 +236,54 @@ processXFTPRequest HTTP2Body {bodyPart} = \case
   XFTPReqPing -> noFile FRPong
   where
     noFile resp = pure (resp, Nothing)
-    createFile :: FileStore -> FileInfo -> NonEmpty RcvPublicVerifyKey -> M FileResponse
-    createFile st file rks = do
+    createFile :: FileInfo -> NonEmpty RcvPublicVerifyKey -> M FileResponse
+    createFile file rks = do
+      st <- asks store
       r <- runExceptT $ do
         sizes <- asks $ allowedChunkSizes . config
         unless (size file `elem` sizes) $ throwError SIZE
         ts <- liftIO getSystemTime
         -- TODO validate body empty
-        sId <- ExceptT $ addFileRetry 3 ts
-        rcps <- mapM (ExceptT . addRecipientRetry 3 sId) rks
+        sId <- ExceptT $ addFileRetry st file 3 ts
+        rcps <- mapM (ExceptT . addRecipientRetry st 3 sId) rks
         withFileLog $ \sl -> do
           logAddFile sl sId file ts
           logAddRecipients sl sId rcps
+        stats <- asks serverStats
+        atomically $ modifyTVar' (filesCreated stats) (+ 1)
+        atomically $ modifyTVar' (fileRecipients stats) (+ length rks)
         let rIds = L.map (\(FileRecipient rId _) -> rId) rcps
         pure $ FRSndIds sId rIds
       pure $ either FRErr id r
-      where
-        addFileRetry :: Int -> SystemTime -> M (Either XFTPErrorType XFTPFileId)
-        addFileRetry n ts =
-          retryAdd n $ \sId -> runExceptT $ do
-            ExceptT $ addFile st sId file ts
-            pure sId
-        addRecipientRetry :: Int -> XFTPFileId -> RcvPublicVerifyKey -> M (Either XFTPErrorType FileRecipient)
-        addRecipientRetry n sId rpk =
-          retryAdd n $ \rId -> runExceptT $ do
-            let rcp = FileRecipient rId rpk
-            ExceptT $ addRecipient st sId rcp
-            pure rcp
-        retryAdd :: Int -> (XFTPFileId -> STM (Either XFTPErrorType a)) -> M (Either XFTPErrorType a)
-        retryAdd 0 _ = pure $ Left INTERNAL
-        retryAdd n add = do
-          fId <- getFileId
-          atomically (add fId) >>= \case
-            Left DUPLICATE_ -> retryAdd (n - 1) add
-            r -> pure r
+    addFileRetry :: FileStore -> FileInfo -> Int -> SystemTime -> M (Either XFTPErrorType XFTPFileId)
+    addFileRetry st file n ts =
+      retryAdd n $ \sId -> runExceptT $ do
+        ExceptT $ addFile st sId file ts
+        pure sId
+    addRecipientRetry :: FileStore -> Int -> XFTPFileId -> RcvPublicVerifyKey -> M (Either XFTPErrorType FileRecipient)
+    addRecipientRetry st n sId rpk =
+      retryAdd n $ \rId -> runExceptT $ do
+        let rcp = FileRecipient rId rpk
+        ExceptT $ addRecipient st sId rcp
+        pure rcp
+    retryAdd :: Int -> (XFTPFileId -> STM (Either XFTPErrorType a)) -> M (Either XFTPErrorType a)
+    retryAdd 0 _ = pure $ Left INTERNAL
+    retryAdd n add = do
+      fId <- getFileId
+      atomically (add fId) >>= \case
+        Left DUPLICATE_ -> retryAdd (n - 1) add
+        r -> pure r
+    addRecipients :: XFTPFileId -> NonEmpty RcvPublicVerifyKey -> M FileResponse
+    addRecipients sId rks = do
+      st <- asks store
+      r <- runExceptT $ do
+        rcps <- mapM (ExceptT . addRecipientRetry st 3 sId) rks
+        withFileLog $ \sl -> logAddRecipients sl sId rcps
+        stats <- asks serverStats
+        atomically $ modifyTVar' (fileRecipients stats) (+ length rks)
+        let rIds = L.map (\(FileRecipient rId _) -> rId) rcps
+        pure $ FRRcvIds rIds
+      pure $ either FRErr id r
     receiveServerFile :: FileRec -> M FileResponse
     receiveServerFile fr@FileRec {senderId, fileInfo} = case bodyPart of
       -- TODO do not allow repeated file upload
@@ -283,39 +297,55 @@ processXFTPRequest HTTP2Body {bodyPart} = \case
         st <- asks store
         quota_ <- asks $ fileSizeQuota . config
         -- TODO timeout file upload, remove partially uploaded files
+        stats <- asks serverStats
         liftIO $
           runExceptT (receiveFile getBody (XFTPRcvChunkSpec fPath size digest)) >>= \case
             Right () -> do
               used <- readTVarIO $ usedStorage st
               if maybe False (used + fromIntegral size >) quota_
                 then remove fPath $> FRErr QUOTA
-                else atomically (setFilePath' st fr fPath) $> FROk
+                else do
+                  atomically (setFilePath' st fr fPath)
+                  atomically $ modifyTVar' (filesUploaded stats) (+ 1)
+                  atomically $ modifyTVar' (filesCount stats) (+ 1)
+                  atomically $ modifyTVar' (filesSize stats) (+ fromIntegral size)
+                  pure FROk
             Left e -> remove fPath $> FRErr e
         where
           remove fPath = whenM (doesFileExist fPath) (removeFile fPath) `catch` logFileError
 
     sendServerFile :: FileRec -> RcvPublicDhKey -> M (FileResponse, Maybe ServerFile)
-    sendServerFile FileRec {filePath, fileInfo = FileInfo {size}} rDhKey = do
+    sendServerFile FileRec {senderId, filePath, fileInfo = FileInfo {size}} rDhKey = do
       readTVarIO filePath >>= \case
         Just path -> do
           (sDhKey, spDhKey) <- liftIO C.generateKeyPair'
           let dhSecret = C.dh' rDhKey spDhKey
           cbNonce <- liftIO C.randomCbNonce
-          pure $ case LC.cbInit dhSecret cbNonce of
-            Right sbState -> (FRFile sDhKey cbNonce, Just ServerFile {filePath = path, fileSize = size, sbState})
-            _ -> (FRErr INTERNAL, Nothing)
+          case LC.cbInit dhSecret cbNonce of
+            Right sbState -> do
+              stats <- asks serverStats
+              atomically $ modifyTVar' (fileDownloads stats) (+ 1)
+              atomically $ updatePeriodStats (filesDownloaded stats) senderId
+              pure (FRFile sDhKey cbNonce, Just ServerFile {filePath = path, fileSize = size, sbState})
+            _ -> pure (FRErr INTERNAL, Nothing)
         _ -> pure (FRErr NO_FILE, Nothing)
 
     deleteServerFile :: FileRec -> M FileResponse
-    deleteServerFile FileRec {senderId, filePath} = do
+    deleteServerFile FileRec {senderId, fileInfo, filePath} = do
       withFileLog (`logDeleteFile` senderId)
       r <- runExceptT $ do
         path <- readTVarIO filePath
-        ExceptT $ first (\(_ :: SomeException) -> FILE_IO) <$> try (forM_ path $ \p -> whenM (doesFileExist p) (removeFile p))
+        stats <- asks serverStats
+        ExceptT $ first (\(_ :: SomeException) -> FILE_IO) <$> try (forM_ path $ \p -> whenM (doesFileExist p) (removeFile p >> deletedStats stats))
         st <- asks store
         void $ atomically $ deleteFile st senderId
+        atomically $ modifyTVar' (filesDeleted stats) (+ 1)
         pure FROk
       either (pure . FRErr) pure r
+      where
+        deletedStats stats = do
+          atomically $ modifyTVar' (filesCount stats) (subtract 1)
+          atomically $ modifyTVar' (filesSize stats) (subtract $ fromIntegral $ size fileInfo)
 
     logFileError :: SomeException -> IO ()
     logFileError e = logError $ "Error deleting file: " <> tshow e
@@ -325,6 +355,8 @@ processXFTPRequest HTTP2Body {bodyPart} = \case
       withFileLog (`logAckFile` rId)
       st <- asks store
       atomically $ deleteRecipient st rId fr
+      stats <- asks serverStats
+      atomically $ modifyTVar' (fileDownloadAcks stats) (+ 1)
       pure FROk
 
 randomId :: (MonadUnliftIO m, MonadReader XFTPEnv m) => Int -> m ByteString
@@ -361,7 +393,10 @@ restoreServerStats = asks (serverStatsBackupFile . config) >>= mapM_ restoreStat
       liftIO (strDecode <$> B.readFile f) >>= \case
         Right d -> do
           s <- asks serverStats
-          atomically $ setFileServerStats s d
+          fs <- readTVarIO . files =<< asks store
+          let _filesCount = length $ M.keys fs
+              _filesSize = M.foldl' (\n -> (n +) . fromIntegral . size . fileInfo) 0 fs
+          atomically $ setFileServerStats s d {_filesCount, _filesSize}
           renameFile f $ f <> ".bak"
           logInfo "server stats restored"
         Left e -> do

src/Simplex/FileTransfer/Server/Env.hs

@@ -26,7 +26,7 @@ import Simplex.FileTransfer.Server.StoreLog
 import qualified Simplex.Messaging.Crypto as C
 import Simplex.Messaging.Protocol (BasicAuth, RcvPublicVerifyKey)
 import Simplex.Messaging.Server.Expiration
-import Simplex.Messaging.Transport.Server (loadFingerprint, loadTLSServerParams)
+import Simplex.Messaging.Transport.Server (loadFingerprint, loadTLSServerParams, TransportServerConfig)
 import Simplex.Messaging.Util (tshow)
 import System.IO (IOMode (..))
 import UnliftIO.STM
@@ -51,11 +51,11 @@ data XFTPServerConfig = XFTPServerConfig
     privateKeyFile :: FilePath,
     certificateFile :: FilePath,
     -- stats config - see SMP server config
-    logStatsInterval :: Maybe Int,
-    logStatsStartTime :: Int,
+    logStatsInterval :: Maybe Int64,
+    logStatsStartTime :: Int64,
     serverStatsLogFile :: FilePath,
     serverStatsBackupFile :: Maybe FilePath,
-    logTLSErrors :: Bool
+    transportConfig :: TransportServerConfig
   }
 
 data XFTPEnv = XFTPEnv
@@ -68,10 +68,13 @@ data XFTPEnv = XFTPEnv
     serverStats :: FileServerStats
   }
 
+defFileExpirationHours :: Int64
+defFileExpirationHours = 48
+
 defaultFileExpiration :: ExpirationConfig
 defaultFileExpiration =
   ExpirationConfig
-    { ttl = 48 * 3600, -- seconds, 48 hours
+    { ttl = defFileExpirationHours * 3600, -- seconds
       checkInterval = 2 * 3600 -- seconds, 2 hours
     }
 

src/Simplex/FileTransfer/Server/Main.hs

@@ -18,19 +18,21 @@ import Network.Socket (HostName)
 import Options.Applicative
 import Simplex.FileTransfer.Description (FileSize (..), kb, mb)
 import Simplex.FileTransfer.Server (runXFTPServer)
-import Simplex.FileTransfer.Server.Env (XFTPServerConfig (..), defaultFileExpiration)
+import Simplex.FileTransfer.Server.Env (XFTPServerConfig (..), defaultFileExpiration, defFileExpirationHours)
 import qualified Simplex.Messaging.Crypto as C
 import Simplex.Messaging.Encoding.String
 import Simplex.Messaging.Protocol (ProtoServerWithAuth (..), pattern XFTPServer)
 import Simplex.Messaging.Server.CLI
+import Simplex.Messaging.Server.Expiration
 import Simplex.Messaging.Transport.Client (TransportHost (..))
+import Simplex.Messaging.Transport.Server (TransportServerConfig (..), defaultTransportServerConfig)
 import System.Directory (createDirectoryIfMissing, doesFileExist)
 import System.FilePath (combine)
 import System.IO (BufferMode (..), hSetBuffering, stderr, stdout)
 import Text.Read (readMaybe)
 
 xftpServerVersion :: String
-xftpServerVersion = "0.1.0"
+xftpServerVersion = "1.1.0"
 
 xftpServerCLI :: FilePath -> FilePath -> IO ()
 xftpServerCLI cfgPath logPath = do
@@ -76,6 +78,8 @@ xftpServerCLI cfgPath logPath = do
           \# and restoring it when the server is started.\n\
           \# Log is compacted on start (deleted objects are removed).\n"
             <> ("enable: " <> onOff enableStoreLog <> "\n\n")
+            <> "# Expire files after the specified number of hours.\n"
+            <> ("expire_files_hours: " <> show defFileExpirationHours <> "\n\n")
             <> "log_stats: off\n\
                \\n\
                \[AUTH]\n\
@@ -113,10 +117,13 @@ xftpServerCLI cfgPath logPath = do
         enableStoreLog = settingIsOn "STORE_LOG" "enable" ini
         logStats = settingIsOn "STORE_LOG" "log_stats" ini
         c = combine cfgPath . ($ defaultX509Config)
-        printXFTPConfig XFTPServerConfig {allowNewFiles, newFileBasicAuth, xftpPort, storeLogFile} = do
+        printXFTPConfig XFTPServerConfig {allowNewFiles, newFileBasicAuth, xftpPort, storeLogFile, fileExpiration} = do
           putStrLn $ case storeLogFile of
             Just f -> "Store log: " <> f
             _ -> "Store log disabled."
+          putStrLn $ case fileExpiration of
+            Just ExpirationConfig {ttl} -> "expiring files after " <> showTTL ttl
+            _ -> "not expiring files"
           putStrLn $
             "Uploading new files "
               <> if allowNewFiles
@@ -131,10 +138,13 @@ xftpServerCLI cfgPath logPath = do
               storeLogFile = enableStoreLog $> storeLogFilePath,
               filesPath = T.unpack $ strictIni "FILES" "path" ini,
               fileSizeQuota = either error unFileSize <$> strDecodeIni "FILES" "storage_quota" ini,
-              allowedChunkSizes = [256 * kb, 1 * mb, 4 * mb],
+              allowedChunkSizes = [kb 256, mb 1, mb 4],
               allowNewFiles = fromMaybe True $ iniOnOff "AUTH" "new_files" ini,
               newFileBasicAuth = either error id <$> strDecodeIni "AUTH" "create_password" ini,
-              fileExpiration = Just defaultFileExpiration,
+              fileExpiration =
+                Just defaultFileExpiration
+                  { ttl = 3600 * readIniDefault defFileExpirationHours "STORE_LOG" "expire_files_hours" ini
+                  },
               caCertificateFile = c caCrtFile,
               privateKeyFile = c serverKeyFile,
               certificateFile = c serverCrtFile,
@@ -142,7 +152,10 @@ xftpServerCLI cfgPath logPath = do
               logStatsStartTime = 0, -- seconds from 00:00 UTC
               serverStatsLogFile = combine logPath "file-server-stats.daily.log",
               serverStatsBackupFile = logStats $> combine logPath "file-server-stats.log",
-              logTLSErrors = fromMaybe False $ iniOnOff "TRANSPORT" "log_tls_errors" ini
+              transportConfig =
+                defaultTransportServerConfig
+                  { logTLSErrors = fromMaybe False $ iniOnOff "TRANSPORT" "log_tls_errors" ini
+                  }
             }
 
 data CliCommand

src/Simplex/FileTransfer/Server/Stats.hs

@@ -6,6 +6,7 @@ module Simplex.FileTransfer.Server.Stats where
 
 import qualified Data.Attoparsec.ByteString.Char8 as A
 import qualified Data.ByteString.Char8 as B
+import Data.Int (Int64)
 import Data.Time.Clock (UTCTime)
 import Simplex.Messaging.Encoding.String
 import Simplex.Messaging.Protocol (SenderId)
@@ -20,7 +21,9 @@ data FileServerStats = FileServerStats
     filesDeleted :: TVar Int,
     filesDownloaded :: PeriodStats SenderId,
     fileDownloads :: TVar Int,
-    fileDownloadAcks :: TVar Int
+    fileDownloadAcks :: TVar Int,
+    filesCount :: TVar Int,
+    filesSize :: TVar Int64
   }
 
 data FileServerStatsData = FileServerStatsData
@@ -31,8 +34,11 @@ data FileServerStatsData = FileServerStatsData
     _filesDeleted :: Int,
     _filesDownloaded :: PeriodStatsData SenderId,
     _fileDownloads :: Int,
-    _fileDownloadAcks :: Int
+    _fileDownloadAcks :: Int,
+    _filesCount :: Int,
+    _filesSize :: Int64
   }
+  deriving (Show)
 
 newFileServerStats :: UTCTime -> STM FileServerStats
 newFileServerStats ts = do
@@ -44,7 +50,9 @@ newFileServerStats ts = do
   filesDownloaded <- newPeriodStats
   fileDownloads <- newTVar 0
   fileDownloadAcks <- newTVar 0
-  pure FileServerStats {fromTime, filesCreated, fileRecipients, filesUploaded, filesDeleted, filesDownloaded, fileDownloads, fileDownloadAcks}
+  filesCount <- newTVar 0
+  filesSize <- newTVar 0
+  pure FileServerStats {fromTime, filesCreated, fileRecipients, filesUploaded, filesDeleted, filesDownloaded, fileDownloads, fileDownloadAcks, filesCount, filesSize}
 
 getFileServerStatsData :: FileServerStats -> STM FileServerStatsData
 getFileServerStatsData s = do
@@ -56,7 +64,9 @@ getFileServerStatsData s = do
   _filesDownloaded <- getPeriodStatsData $ filesDownloaded s
   _fileDownloads <- readTVar $ fileDownloads s
   _fileDownloadAcks <- readTVar $ fileDownloadAcks s
-  pure FileServerStatsData {_fromTime, _filesCreated, _fileRecipients, _filesUploaded, _filesDeleted, _filesDownloaded, _fileDownloads, _fileDownloadAcks}
+  _filesCount <- readTVar $ filesCount s
+  _filesSize <- readTVar $ filesSize s
+  pure FileServerStatsData {_fromTime, _filesCreated, _fileRecipients, _filesUploaded, _filesDeleted, _filesDownloaded, _fileDownloads, _fileDownloadAcks, _filesCount, _filesSize}
 
 setFileServerStats :: FileServerStats -> FileServerStatsData -> STM ()
 setFileServerStats s d = do
@@ -68,6 +78,8 @@ setFileServerStats s d = do
   setPeriodStats (filesDownloaded s) $! _filesDownloaded d
   writeTVar (fileDownloads s) $! _fileDownloads d
   writeTVar (fileDownloadAcks s) $! _fileDownloadAcks d
+  writeTVar (filesCount s) $! _filesCount d
+  writeTVar (filesSize s) $! _filesSize d
 
 instance StrEncoding FileServerStatsData where
   strEncode FileServerStatsData {_fromTime, _filesCreated, _fileRecipients, _filesUploaded, _filesDeleted, _filesDownloaded, _fileDownloads, _fileDownloadAcks} =
@@ -77,7 +89,8 @@ instance StrEncoding FileServerStatsData where
         "fileRecipients=" <> strEncode _fileRecipients,
         "filesUploaded=" <> strEncode _filesUploaded,
         "filesDeleted=" <> strEncode _filesDeleted,
-        "filesDownloaded=" <> strEncode _filesDownloaded,
+        "filesDownloaded:",
+        strEncode _filesDownloaded,
         "fileDownloads=" <> strEncode _fileDownloads,
         "fileDownloadAcks=" <> strEncode _fileDownloadAcks
       ]
@@ -87,7 +100,7 @@ instance StrEncoding FileServerStatsData where
     _fileRecipients <- "fileRecipients=" *> strP <* A.endOfLine
     _filesUploaded <- "filesUploaded=" *> strP <* A.endOfLine
     _filesDeleted <- "filesDeleted=" *> strP <* A.endOfLine
-    _filesDownloaded <- "filesDownloaded=" *> strP <* A.endOfLine
+    _filesDownloaded <- "filesDownloaded:" *> A.endOfLine *> strP <* A.endOfLine
     _fileDownloads <- "fileDownloads=" *> strP <* A.endOfLine
     _fileDownloadAcks <- "fileDownloadAcks=" *> strP <* A.endOfLine
-    pure FileServerStatsData {_fromTime, _filesCreated, _fileRecipients, _filesUploaded, _filesDeleted, _filesDownloaded, _fileDownloads, _fileDownloadAcks}
+    pure FileServerStatsData {_fromTime, _filesCreated, _fileRecipients, _filesUploaded, _filesDeleted, _filesDownloaded, _fileDownloads, _fileDownloadAcks, _filesCount = 0, _filesSize = 0}

src/Simplex/FileTransfer/Server/Store.hs

@@ -115,8 +115,8 @@ deleteRecipient FileStore {recipients} rId FileRec {recipientIds} = do
 
 getFile :: FileStore -> SFileParty p -> XFTPFileId -> STM (Either XFTPErrorType (FileRec, C.APublicVerifyKey))
 getFile st party fId = case party of
-  SSender -> withFile st fId $ pure . Right . (\f -> (f, sndKey $ fileInfo f))
-  SRecipient ->
+  SFSender -> withFile st fId $ pure . Right . (\f -> (f, sndKey $ fileInfo f))
+  SFRecipient ->
     TM.lookup fId (recipients st) >>= \case
       Just (sId, rKey) -> withFile st sId $ pure . Right . (,rKey)
       _ -> pure $ Left AUTH

src/Simplex/FileTransfer/Transport.hs

@@ -15,9 +15,10 @@ module Simplex.FileTransfer.Transport
   )
 where
 
-import Control.Concurrent (threadDelay)
 import qualified Control.Exception as E
+import Control.Monad
 import Control.Monad.Except
+import Control.Monad.IO.Class
 import qualified Data.ByteArray as BA
 import Data.ByteString.Builder (Builder, byteString)
 import Data.ByteString.Char8 (ByteString)
@@ -57,15 +58,12 @@ sendEncFile :: Handle -> (Builder -> IO ()) -> LC.SbState -> Word32 -> IO ()
 sendEncFile h send = go
   where
     go sbState 0 = do
-      -- TODO remove padding when HTTP2 issue is fixed
-      let authTag = BA.convert (LC.sbAuth sbState) <> B.replicate (fileBlockSize - C.authTagSize) '#'
+      let authTag = BA.convert (LC.sbAuth sbState)
       send $ byteString authTag
     go sbState sz =
       getFileChunk h sz >>= \ch -> do
         let (encCh, sbState') = LC.sbEncryptChunk sbState ch
         send (byteString encCh) `E.catch` \(e :: E.SomeException) -> print e >> E.throwIO e
-        -- TODO remove delay when HTTP2 issue is fixed
-        threadDelay 500
         go sbState' $ sz - fromIntegral (B.length ch)
 
 getFileChunk :: Handle -> Word32 -> IO ByteString
@@ -113,5 +111,5 @@ receiveEncFile getBody = receiveFile_ . receive
 receiveFile_ :: (Handle -> Word32 -> IO (Either XFTPErrorType ())) -> XFTPRcvChunkSpec -> ExceptT XFTPErrorType IO ()
 receiveFile_ receive XFTPRcvChunkSpec {filePath, chunkSize, chunkDigest} = do
   ExceptT $ withFile filePath WriteMode (`receive` chunkSize)
-  digest' <- liftIO $ LC.sha512Hash <$> LB.readFile filePath
+  digest' <- liftIO $ LC.sha256Hash <$> LB.readFile filePath
   when (digest' /= chunkDigest) $ throwError DIGEST

src/Simplex/FileTransfer/Types.hs

@@ -0,0 +1,228 @@
+{-# LANGUAGE DuplicateRecordFields #-}
+{-# LANGUAGE LambdaCase #-}
+{-# LANGUAGE NamedFieldPuns #-}
+{-# LANGUAGE OverloadedStrings #-}
+
+module Simplex.FileTransfer.Types where
+
+import Data.Int (Int64)
+import Data.Word (Word32)
+import Database.SQLite.Simple.FromField (FromField (..))
+import Database.SQLite.Simple.ToField (ToField (..))
+import Simplex.FileTransfer.Client (XFTPChunkSpec (..))
+import Simplex.FileTransfer.Description
+import Simplex.Messaging.Agent.Protocol (RcvFileId, SndFileId)
+import qualified Simplex.Messaging.Crypto as C
+import Simplex.Messaging.Encoding
+import Simplex.Messaging.Encoding.String
+import Simplex.Messaging.Parsers (fromTextField_)
+import Simplex.Messaging.Protocol
+import System.FilePath ((</>))
+
+authTagSize :: Int64
+authTagSize = fromIntegral C.authTagSize
+
+-- fileExtra is added to allow header extension in future versions
+data FileHeader = FileHeader
+  { fileName :: String,
+    fileExtra :: Maybe String
+  }
+  deriving (Eq, Show)
+
+instance Encoding FileHeader where
+  smpEncode FileHeader {fileName, fileExtra} = smpEncode (fileName, fileExtra)
+  smpP = do
+    (fileName, fileExtra) <- smpP
+    pure FileHeader {fileName, fileExtra}
+
+type DBRcvFileId = Int64
+
+data RcvFile = RcvFile
+  { rcvFileId :: DBRcvFileId,
+    rcvFileEntityId :: RcvFileId,
+    userId :: Int64,
+    size :: FileSize Int64,
+    digest :: FileDigest,
+    key :: C.SbKey,
+    nonce :: C.CbNonce,
+    chunkSize :: FileSize Word32,
+    chunks :: [RcvFileChunk],
+    prefixPath :: FilePath,
+    tmpPath :: Maybe FilePath,
+    savePath :: FilePath,
+    status :: RcvFileStatus,
+    deleted :: Bool
+  }
+  deriving (Eq, Show)
+
+data RcvFileStatus
+  = RFSReceiving
+  | RFSReceived
+  | RFSDecrypting
+  | RFSComplete
+  | RFSError
+  deriving (Eq, Show)
+
+instance FromField RcvFileStatus where fromField = fromTextField_ textDecode
+
+instance ToField RcvFileStatus where toField = toField . textEncode
+
+instance TextEncoding RcvFileStatus where
+  textDecode = \case
+    "receiving" -> Just RFSReceiving
+    "received" -> Just RFSReceived
+    "decrypting" -> Just RFSDecrypting
+    "complete" -> Just RFSComplete
+    "error" -> Just RFSError
+    _ -> Nothing
+  textEncode = \case
+    RFSReceiving -> "receiving"
+    RFSReceived -> "received"
+    RFSDecrypting -> "decrypting"
+    RFSComplete -> "complete"
+    RFSError -> "error"
+
+data RcvFileChunk = RcvFileChunk
+  { rcvFileId :: DBRcvFileId,
+    rcvFileEntityId :: RcvFileId,
+    userId :: Int64,
+    rcvChunkId :: Int64,
+    chunkNo :: Int,
+    chunkSize :: FileSize Word32,
+    digest :: FileDigest,
+    replicas :: [RcvFileChunkReplica],
+    fileTmpPath :: FilePath,
+    chunkTmpPath :: Maybe FilePath
+  }
+  deriving (Eq, Show)
+
+data RcvFileChunkReplica = RcvFileChunkReplica
+  { rcvChunkReplicaId :: Int64,
+    server :: XFTPServer,
+    replicaId :: ChunkReplicaId,
+    replicaKey :: C.APrivateSignKey,
+    received :: Bool,
+    delay :: Maybe Int64,
+    retries :: Int
+  }
+  deriving (Eq, Show)
+
+-- Sending files
+
+type DBSndFileId = Int64
+
+data SndFile = SndFile
+  { sndFileId :: DBSndFileId,
+    sndFileEntityId :: SndFileId,
+    userId :: Int64,
+    numRecipients :: Int,
+    digest :: Maybe FileDigest,
+    key :: C.SbKey,
+    nonce :: C.CbNonce,
+    chunks :: [SndFileChunk],
+    filePath :: FilePath,
+    prefixPath :: Maybe FilePath,
+    status :: SndFileStatus,
+    deleted :: Bool
+  }
+  deriving (Eq, Show)
+
+sndFileEncPath :: FilePath -> FilePath
+sndFileEncPath prefixPath = prefixPath </> "xftp.encrypted"
+
+data SndFileStatus
+  = SFSNew -- db record created
+  | SFSEncrypting -- encryption started
+  | SFSEncrypted -- encryption complete
+  | SFSUploading -- all chunk replicas are created on servers
+  | SFSComplete -- all chunk replicas are uploaded
+  | SFSError -- permanent error
+  deriving (Eq, Show)
+
+instance FromField SndFileStatus where fromField = fromTextField_ textDecode
+
+instance ToField SndFileStatus where toField = toField . textEncode
+
+instance TextEncoding SndFileStatus where
+  textDecode = \case
+    "new" -> Just SFSNew
+    "encrypting" -> Just SFSEncrypting
+    "encrypted" -> Just SFSEncrypted
+    "uploading" -> Just SFSUploading
+    "complete" -> Just SFSComplete
+    "error" -> Just SFSError
+    _ -> Nothing
+  textEncode = \case
+    SFSNew -> "new"
+    SFSEncrypting -> "encrypting"
+    SFSEncrypted -> "encrypted"
+    SFSUploading -> "uploading"
+    SFSComplete -> "complete"
+    SFSError -> "error"
+
+data SndFileChunk = SndFileChunk
+  { sndFileId :: DBSndFileId,
+    sndFileEntityId :: SndFileId,
+    userId :: Int64,
+    numRecipients :: Int,
+    sndChunkId :: Int64,
+    chunkNo :: Int,
+    chunkSpec :: XFTPChunkSpec,
+    filePrefixPath :: FilePath,
+    digest :: FileDigest,
+    replicas :: [SndFileChunkReplica]
+  }
+  deriving (Eq, Show)
+
+sndChunkSize :: SndFileChunk -> Word32
+sndChunkSize SndFileChunk {chunkSpec = XFTPChunkSpec {chunkSize}} = chunkSize
+
+data NewSndChunkReplica = NewSndChunkReplica
+  { server :: XFTPServer,
+    replicaId :: ChunkReplicaId,
+    replicaKey :: C.APrivateSignKey,
+    rcvIdsKeys :: [(ChunkReplicaId, C.APrivateSignKey)]
+  }
+  deriving (Eq, Show)
+
+data SndFileChunkReplica = SndFileChunkReplica
+  { sndChunkReplicaId :: Int64,
+    server :: XFTPServer,
+    replicaId :: ChunkReplicaId,
+    replicaKey :: C.APrivateSignKey,
+    rcvIdsKeys :: [(ChunkReplicaId, C.APrivateSignKey)],
+    replicaStatus :: SndFileReplicaStatus,
+    delay :: Maybe Int64,
+    retries :: Int
+  }
+  deriving (Eq, Show)
+
+data SndFileReplicaStatus
+  = SFRSCreated
+  | SFRSUploaded
+  deriving (Eq, Show)
+
+instance FromField SndFileReplicaStatus where fromField = fromTextField_ textDecode
+
+instance ToField SndFileReplicaStatus where toField = toField . textEncode
+
+instance TextEncoding SndFileReplicaStatus where
+  textDecode = \case
+    "created" -> Just SFRSCreated
+    "uploaded" -> Just SFRSUploaded
+    _ -> Nothing
+  textEncode = \case
+    SFRSCreated -> "created"
+    SFRSUploaded -> "uploaded"
+
+data DeletedSndChunkReplica = DeletedSndChunkReplica
+  { deletedSndChunkReplicaId :: Int64,
+    userId :: Int64,
+    server :: XFTPServer,
+    replicaId :: ChunkReplicaId,
+    replicaKey :: C.APrivateSignKey,
+    chunkDigest :: FileDigest,
+    delay :: Maybe Int64,
+    retries :: Int
+  }
+  deriving (Eq, Show)

src/Simplex/FileTransfer/Util.hs

@@ -0,0 +1,24 @@
+module Simplex.FileTransfer.Util
+  ( uniqueCombine,
+    removePath,
+  )
+where
+
+import Simplex.Messaging.Util (ifM, whenM)
+import System.FilePath (splitExtensions, (</>))
+import UnliftIO
+import UnliftIO.Directory
+
+uniqueCombine :: MonadIO m => FilePath -> String -> m FilePath
+uniqueCombine filePath fileName = tryCombine (0 :: Int)
+  where
+    tryCombine n =
+      let (name, ext) = splitExtensions fileName
+          suffix = if n == 0 then "" else "_" <> show n
+          f = filePath </> (name <> suffix <> ext)
+       in ifM (doesPathExist f) (tryCombine $ n + 1) (pure f)
+
+removePath :: MonadIO m => FilePath -> m ()
+removePath p = do
+  ifM (doesDirectoryExist p) (removeDirectoryRecursive p) $
+    whenM (doesFileExist p) (removeFile p)

src/Simplex/Messaging/Agent/Client.hs

@@ -10,21 +10,26 @@
 {-# LANGUAGE LambdaCase #-}
 {-# LANGUAGE NamedFieldPuns #-}
 {-# LANGUAGE OverloadedLists #-}
+{-# LANGUAGE OverloadedRecordDot #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE RankNTypes #-}
 {-# LANGUAGE ScopedTypeVariables #-}
 {-# LANGUAGE TupleSections #-}
 {-# LANGUAGE TypeApplications #-}
+{-# LANGUAGE TypeFamilyDependencies #-}
 
 module Simplex.Messaging.Agent.Client
   ( AgentClient (..),
-    SMPTestFailure (..),
-    SMPTestStep (..),
+    ProtocolTestFailure (..),
+    ProtocolTestStep (..),
     newAgentClient,
     withConnLock,
     closeAgentClient,
     closeProtocolServerClients,
+    closeXFTPServerClient,
     runSMPServerTest,
+    runXFTPServerTest,
+    getXFTPWorkPath,
     newRcvQueue,
     subscribeQueues,
     getQueueMessage,
@@ -37,7 +42,9 @@ module Simplex.Messaging.Agent.Client
     temporaryOrHostError,
     secureQueue,
     enableQueueNotifications,
+    enableQueuesNtfs,
     disableQueueNotifications,
+    disableQueuesNtfs,
     sendAgentMessage,
     agentNtfRegisterToken,
     agentNtfVerifyToken,
@@ -48,6 +55,11 @@ module Simplex.Messaging.Agent.Client
     agentNtfCreateSubscription,
     agentNtfCheckSubscription,
     agentNtfDeleteSubscription,
+    agentXFTPDownloadChunk,
+    agentXFTPNewChunk,
+    agentXFTPUploadChunk,
+    agentXFTPAddRecipients,
+    agentXFTPDeleteChunk,
     agentCbEncrypt,
     agentCbDecrypt,
     cryptoError,
@@ -72,25 +84,35 @@ module Simplex.Messaging.Agent.Client
     throwWhenNoDelivery,
     beginAgentOperation,
     endAgentOperation,
+    waitUntilForeground,
     suspendSendingAndDatabase,
     suspendOperation,
     notifySuspended,
     whenSuspending,
     withStore,
     withStore',
+    withStoreCtx,
+    withStoreCtx',
     storeError,
+    userServers,
+    pickServer,
+    getNextServer,
+    withUserServers,
+    withNextSrv,
   )
 where
 
 import Control.Applicative ((<|>))
 import Control.Concurrent (forkIO, threadDelay)
 import Control.Concurrent.Async (Async, uninterruptibleCancel)
-import Control.Concurrent.STM (retry, stateTVar, throwSTM)
+import Control.Concurrent.STM (retry, throwSTM)
 import Control.Exception (AsyncException (..))
 import Control.Logger.Simple
+import Control.Monad
 import Control.Monad.Except
 import Control.Monad.IO.Unlift
 import Control.Monad.Reader
+import Crypto.Random (getRandomBytes)
 import Data.Aeson (ToJSON)
 import qualified Data.Aeson as J
 import Data.Bifunctor (bimap, first, second)
@@ -99,7 +121,7 @@ import Data.ByteString.Char8 (ByteString)
 import qualified Data.ByteString.Char8 as B
 import Data.Either (lefts, partitionEithers)
 import Data.Functor (($>))
-import Data.List (foldl', partition)
+import Data.List (deleteFirstsBy, foldl', partition, (\\))
 import Data.List.NonEmpty (NonEmpty (..), (<|))
 import qualified Data.List.NonEmpty as L
 import Data.Map.Strict (Map)
@@ -108,16 +130,24 @@ import Data.Maybe (isJust, listToMaybe)
 import Data.Set (Set)
 import qualified Data.Set as S
 import Data.Text.Encoding
+import Data.Time (UTCTime, defaultTimeLocale, formatTime, getCurrentTime)
 import Data.Word (Word16)
-import qualified Database.SQLite.Simple as DB
 import GHC.Generics (Generic)
 import Network.Socket (HostName)
+import Simplex.FileTransfer.Client (XFTPChunkSpec (..), XFTPClient, XFTPClientConfig (..), XFTPClientError)
+import qualified Simplex.FileTransfer.Client as X
+import Simplex.FileTransfer.Description (ChunkReplicaId (..), FileDigest (..), kb)
+import Simplex.FileTransfer.Protocol (FileInfo (..), FileResponse, XFTPErrorType (DIGEST))
+import Simplex.FileTransfer.Transport (XFTPRcvChunkSpec (..))
+import Simplex.FileTransfer.Types (DeletedSndChunkReplica (..), NewSndChunkReplica (..), RcvFileChunkReplica (..), SndFileChunk (..), SndFileChunkReplica (..))
+import Simplex.FileTransfer.Util (uniqueCombine)
 import Simplex.Messaging.Agent.Env.SQLite
 import Simplex.Messaging.Agent.Lock
 import Simplex.Messaging.Agent.Protocol
 import Simplex.Messaging.Agent.RetryInterval
 import Simplex.Messaging.Agent.Store
 import Simplex.Messaging.Agent.Store.SQLite (SQLiteStore (..), withTransaction)
+import qualified Simplex.Messaging.Agent.Store.SQLite.DB as DB
 import Simplex.Messaging.Agent.TAsyncs
 import Simplex.Messaging.Agent.TRcvQueues (TRcvQueues)
 import qualified Simplex.Messaging.Agent.TRcvQueues as RQ
@@ -137,11 +167,9 @@ import Simplex.Messaging.Protocol
     ErrorType,
     MsgFlags (..),
     MsgId,
-    NotifierId,
-    NtfPrivateSignKey,
-    NtfPublicVerifyKey,
     NtfServer,
     ProtoServer,
+    ProtoServerWithAuth (..),
     Protocol (..),
     ProtocolServer (..),
     ProtocolTypeI (..),
@@ -150,7 +178,12 @@ import Simplex.Messaging.Protocol
     RcvMessage (..),
     RcvNtfPublicDhKey,
     SMPMsgMeta (..),
+    SProtocolType (..),
     SndPublicVerifyKey,
+    UserProtocol,
+    XFTPServer,
+    XFTPServerWithAuth,
+    sameSrvAddr',
   )
 import qualified Simplex.Messaging.Protocol as SMP
 import Simplex.Messaging.TMap (TMap)
@@ -158,21 +191,27 @@ import qualified Simplex.Messaging.TMap as TM
 import Simplex.Messaging.Transport.Client (TransportHost)
 import Simplex.Messaging.Util
 import Simplex.Messaging.Version
+import System.Random (randomR)
 import System.Timeout (timeout)
 import UnliftIO (mapConcurrently)
+import UnliftIO.Directory (getTemporaryDirectory)
 import qualified UnliftIO.Exception as E
 import UnliftIO.STM
 
-type ClientVar err msg = TMVar (Either AgentErrorType (ProtocolClient err msg))
+type ClientVar msg = TMVar (Either AgentErrorType (Client msg))
 
-type SMPClientVar = TMVar (Either AgentErrorType SMPClient)
+type SMPClientVar = ClientVar SMP.BrokerMsg
 
-type NtfClientVar = TMVar (Either AgentErrorType NtfClient)
+type NtfClientVar = ClientVar NtfResponse
+
+type XFTPClientVar = TMVar (Either AgentErrorType XFTPClient)
 
 type SMPTransportSession = TransportSession SMP.BrokerMsg
 
 type NtfTransportSession = TransportSession NtfResponse
 
+type XFTPTransportSession = TransportSession FileResponse
+
 data AgentClient = AgentClient
   { active :: TVar Bool,
     rcvQ :: TBQueue (ATransmission 'Client),
@@ -182,6 +221,8 @@ data AgentClient = AgentClient
     smpClients :: TMap SMPTransportSession SMPClientVar,
     ntfServers :: TVar [NtfServer],
     ntfClients :: TMap NtfTransportSession NtfClientVar,
+    xftpServers :: TMap UserId (NonEmpty XFTPServerWithAuth),
+    xftpClients :: TMap XFTPTransportSession XFTPClientVar,
     useNetworkConfig :: TVar NetworkConfig,
     subscrConns :: TVar (Set ConnId),
     activeSubs :: TRcvQueues,
@@ -228,7 +269,7 @@ agentOperations = [ntfNetworkOp, rcvNetworkOp, msgDeliveryOp, sndNetworkOp, data
 
 data AgentOpState = AgentOpState {opSuspended :: Bool, opsInProgress :: Int}
 
-data AgentState = ASActive | ASSuspending | ASSuspended
+data AgentState = ASForeground | ASSuspending | ASSuspended
   deriving (Eq, Show)
 
 data AgentLocks = AgentLocks {connLocks :: Map String String, srvLocks :: Map String String, delLock :: Maybe String}
@@ -246,7 +287,7 @@ data AgentStatsKey = AgentStatsKey
   deriving (Eq, Ord, Show)
 
 newAgentClient :: InitialAgentServers -> Env -> STM AgentClient
-newAgentClient InitialAgentServers {smp, ntf, netCfg} agentEnv = do
+newAgentClient InitialAgentServers {smp, ntf, xftp, netCfg} agentEnv = do
   let qSize = tbqSize $ config agentEnv
   active <- newTVar True
   rcvQ <- newTBQueue qSize
@@ -256,6 +297,8 @@ newAgentClient InitialAgentServers {smp, ntf, netCfg} agentEnv = do
   smpClients <- TM.empty
   ntfServers <- newTVar ntf
   ntfClients <- TM.empty
+  xftpServers <- newTVar xftp
+  xftpClients <- TM.empty
   useNetworkConfig <- newTVar netCfg
   subscrConns <- newTVar S.empty
   activeSubs <- RQ.empty
@@ -271,7 +314,7 @@ newAgentClient InitialAgentServers {smp, ntf, netCfg} agentEnv = do
   msgDeliveryOp <- newTVar $ AgentOpState False 0
   sndNetworkOp <- newTVar $ AgentOpState False 0
   databaseOp <- newTVar $ AgentOpState False 0
-  agentState <- newTVar ASActive
+  agentState <- newTVar ASForeground
   getMsgLocks <- TM.empty
   connLocks <- TM.empty
   deleteLock <- createLock
@@ -290,6 +333,8 @@ newAgentClient InitialAgentServers {smp, ntf, netCfg} agentEnv = do
         smpClients,
         ntfServers,
         ntfClients,
+        xftpServers,
+        xftpClients,
         useNetworkConfig,
         subscrConns,
         activeSubs,
@@ -320,21 +365,45 @@ newAgentClient InitialAgentServers {smp, ntf, netCfg} agentEnv = do
 agentClientStore :: AgentClient -> SQLiteStore
 agentClientStore AgentClient {agentEnv = Env {store}} = store
 
-class ProtocolServerClient err msg | msg -> err where
-  getProtocolServerClient :: AgentMonad m => AgentClient -> TransportSession msg -> m (ProtocolClient err msg)
+class (Encoding err, Show err) => ProtocolServerClient err msg | msg -> err where
+  type Client msg = c | c -> msg
+  getProtocolServerClient :: AgentMonad m => AgentClient -> TransportSession msg -> m (Client msg)
   clientProtocolError :: err -> AgentErrorType
+  closeProtocolServerClient :: Client msg -> IO ()
+  clientServer :: Client msg -> String
+  clientTransportHost :: Client msg -> TransportHost
+  clientSessionTs :: Client msg -> UTCTime
 
 instance ProtocolServerClient ErrorType BrokerMsg where
+  type Client BrokerMsg = ProtocolClient ErrorType BrokerMsg
   getProtocolServerClient = getSMPServerClient
   clientProtocolError = SMP
+  closeProtocolServerClient = closeProtocolClient
+  clientServer = protocolClientServer
+  clientTransportHost = transportHost'
+  clientSessionTs = sessionTs
 
 instance ProtocolServerClient ErrorType NtfResponse where
+  type Client NtfResponse = ProtocolClient ErrorType NtfResponse
   getProtocolServerClient = getNtfServerClient
   clientProtocolError = NTF
+  closeProtocolServerClient = closeProtocolClient
+  clientServer = protocolClientServer
+  clientTransportHost = transportHost'
+  clientSessionTs = sessionTs
+
+instance ProtocolServerClient XFTPErrorType FileResponse where
+  type Client FileResponse = XFTPClient
+  getProtocolServerClient = getXFTPServerClient
+  clientProtocolError = XFTP
+  closeProtocolServerClient = X.closeXFTPClient
+  clientServer = X.xftpClientServer
+  clientTransportHost = X.xftpTransportHost
+  clientSessionTs = X.xftpSessionTs
 
 getSMPServerClient :: forall m. AgentMonad m => AgentClient -> SMPTransportSession -> m SMPClient
 getSMPServerClient c@AgentClient {active, smpClients, msgQ} tSess@(userId, srv, _) = do
-  unlessM (readTVarIO active) . throwError $ INTERNAL "agent is stopped"
+  unlessM (readTVarIO active) . throwError $ INACTIVE
   atomically (getClientVar tSess smpClients)
     >>= either
       (newProtocolClient c tSess smpClients connectClient reconnectSMPClient)
@@ -356,7 +425,7 @@ getSMPServerClient c@AgentClient {active, smpClients, msgQ} tSess@(userId, srv,
           TM.delete tSess smpClients
           qs <- RQ.getDelSessQueues tSess $ activeSubs c
           mapM_ (`RQ.addQueue` pendingSubs c) qs
-          let cs = S.fromList $ map qConnId qs
+          let cs = S.fromList $ map (\q -> q.connId) qs
           cs' <- RQ.getConns $ activeSubs c
           pure (qs, S.toList $ cs `S.difference` cs')
 
@@ -369,16 +438,16 @@ getSMPServerClient c@AgentClient {active, smpClients, msgQ} tSess@(userId, srv,
             atomically $ mapM_ (releaseGetLock c) qs
             unliftIO u $ reconnectServer c tSess
 
-        notifySub :: ConnId -> ACommand 'Agent -> IO ()
-        notifySub connId cmd = atomically $ writeTBQueue (subQ c) ("", connId, cmd)
+        notifySub :: forall e. AEntityI e => ConnId -> ACommand 'Agent e -> IO ()
+        notifySub connId cmd = atomically $ writeTBQueue (subQ c) ("", connId, APC (sAEntity @e) cmd)
 
 reconnectServer :: AgentMonad m => AgentClient -> SMPTransportSession -> m ()
 reconnectServer c tSess = newAsyncAction tryReconnectSMPClient $ reconnections c
   where
     tryReconnectSMPClient aId = do
       ri <- asks $ reconnectInterval . config
-      withRetryInterval ri $ \loop ->
-        reconnectSMPClient c tSess `catchError` const loop
+      withRetryInterval ri $ \_ loop ->
+        reconnectSMPClient c tSess `catchAgentError` const loop
       atomically . removeAsyncAction aId $ reconnections c
 
 reconnectSMPClient :: forall m. AgentMonad m => AgentClient -> SMPTransportSession -> m ()
@@ -397,12 +466,12 @@ reconnectSMPClient c tSess@(_, srv, _) =
       let (tempErrs, finalErrs) = partition (temporaryAgentError . snd) errs
       liftIO $ mapM_ (\(connId, e) -> notifySub connId $ ERR e) finalErrs
       mapM_ (throwError . snd) $ listToMaybe tempErrs
-    notifySub :: ConnId -> ACommand 'Agent -> IO ()
-    notifySub connId cmd = atomically $ writeTBQueue (subQ c) ("", connId, cmd)
+    notifySub :: forall e. AEntityI e => ConnId -> ACommand 'Agent e -> IO ()
+    notifySub connId cmd = atomically $ writeTBQueue (subQ c) ("", connId, APC (sAEntity @e) cmd)
 
 getNtfServerClient :: forall m. AgentMonad m => AgentClient -> NtfTransportSession -> m NtfClient
 getNtfServerClient c@AgentClient {active, ntfClients} tSess@(userId, srv, _) = do
-  unlessM (readTVarIO active) . throwError $ INTERNAL "agent is stopped"
+  unlessM (readTVarIO active) . throwError $ INACTIVE
   atomically (getClientVar tSess ntfClients)
     >>= either
       (newProtocolClient c tSess ntfClients connectClient $ \_ _ -> pure ())
@@ -417,7 +486,28 @@ getNtfServerClient c@AgentClient {active, ntfClients} tSess@(userId, srv, _) = d
     clientDisconnected client = do
       atomically $ TM.delete tSess ntfClients
       incClientStat c userId client "DISCONNECT" ""
-      atomically $ writeTBQueue (subQ c) ("", "", hostEvent DISCONNECT client)
+      atomically $ writeTBQueue (subQ c) ("", "", APC SAENone $ hostEvent DISCONNECT client)
+      logInfo . decodeUtf8 $ "Agent disconnected from " <> showServer srv
+
+getXFTPServerClient :: forall m. AgentMonad m => AgentClient -> XFTPTransportSession -> m XFTPClient
+getXFTPServerClient c@AgentClient {active, xftpClients, useNetworkConfig} tSess@(userId, srv, _) = do
+  unlessM (readTVarIO active) . throwError $ INACTIVE
+  atomically (getClientVar tSess xftpClients)
+    >>= either
+      (newProtocolClient c tSess xftpClients connectClient $ \_ _ -> pure ())
+      (waitForProtocolClient c tSess)
+  where
+    connectClient :: m XFTPClient
+    connectClient = do
+      cfg <- asks $ xftpCfg . config
+      xftpNetworkConfig <- readTVarIO useNetworkConfig
+      liftEitherError (protocolClientError XFTP $ B.unpack $ strEncode srv) (X.getXFTPClient tSess cfg {xftpNetworkConfig} clientDisconnected)
+
+    clientDisconnected :: XFTPClient -> IO ()
+    clientDisconnected client = do
+      atomically $ TM.delete tSess xftpClients
+      incClientStat c userId client "DISCONNECT" ""
+      atomically $ writeTBQueue (subQ c) ("", "", APC SAENone $ hostEvent DISCONNECT client)
       logInfo . decodeUtf8 $ "Agent disconnected from " <> showServer srv
 
 getClientVar :: forall a s. TransportSession s -> TMap (TransportSession s) (TMVar a) -> STM (Either (TMVar a) (TMVar a))
@@ -429,7 +519,7 @@ getClientVar tSess clients = maybe (Left <$> newClientVar) (pure . Right) =<< TM
       TM.insert tSess var clients
       pure var
 
-waitForProtocolClient :: (AgentMonad m, ProtocolTypeI (ProtoType msg)) => AgentClient -> TransportSession msg -> ClientVar err msg -> m (ProtocolClient err msg)
+waitForProtocolClient :: (AgentMonad m, ProtocolTypeI (ProtoType msg)) => AgentClient -> TransportSession msg -> ClientVar msg -> m (Client msg)
 waitForProtocolClient c (_, srv, _) clientVar = do
   NetworkConfig {tcpConnectTimeout} <- readTVarIO $ useNetworkConfig c
   client_ <- liftIO $ tcpConnectTimeout `timeout` atomically (readTMVar clientVar)
@@ -440,24 +530,24 @@ waitForProtocolClient c (_, srv, _) clientVar = do
 
 newProtocolClient ::
   forall err msg m.
-  (AgentMonad m, ProtocolTypeI (ProtoType msg)) =>
+  (AgentMonad m, ProtocolTypeI (ProtoType msg), ProtocolServerClient err msg) =>
   AgentClient ->
   TransportSession msg ->
-  TMap (TransportSession msg) (ClientVar err msg) ->
-  m (ProtocolClient err msg) ->
+  TMap (TransportSession msg) (ClientVar msg) ->
+  m (Client msg) ->
   (AgentClient -> TransportSession msg -> m ()) ->
-  ClientVar err msg ->
-  m (ProtocolClient err msg)
+  ClientVar msg ->
+  m (Client msg)
 newProtocolClient c tSess@(userId, srv, entityId_) clients connectClient reconnectClient clientVar = tryConnectClient pure tryConnectAsync
   where
-    tryConnectClient :: (ProtocolClient err msg -> m a) -> m () -> m a
+    tryConnectClient :: (Client msg -> m a) -> m () -> m a
     tryConnectClient successAction retryAction =
       tryError connectClient >>= \r -> case r of
         Right client -> do
           logInfo . decodeUtf8 $ "Agent connected to " <> showServer srv <> " (user " <> bshow userId <> maybe "" (" for entity " <>) entityId_ <> ")"
           atomically $ putTMVar clientVar r
           liftIO $ incClientStat c userId client "CLIENT" "OK"
-          atomically $ writeTBQueue (subQ c) ("", "", hostEvent CONNECT client)
+          atomically $ writeTBQueue (subQ c) ("", "", APC SAENone $ hostEvent CONNECT client)
           successAction client
         Left e -> do
           liftIO $ incServerStat c userId srv "CLIENT" $ strEncode e
@@ -472,13 +562,13 @@ newProtocolClient c tSess@(userId, srv, entityId_) clients connectClient reconne
     connectAsync :: Int -> m ()
     connectAsync aId = do
       ri <- asks $ reconnectInterval . config
-      withRetryInterval ri $ \loop -> void $ tryConnectClient (const $ reconnectClient c tSess) loop
+      withRetryInterval ri $ \_ loop -> void $ tryConnectClient (const $ reconnectClient c tSess) loop
       atomically . removeAsyncAction aId $ asyncClients c
 
-hostEvent :: forall err msg. ProtocolTypeI (ProtoType msg) => (AProtocolType -> TransportHost -> ACommand 'Agent) -> ProtocolClient err msg -> ACommand 'Agent
-hostEvent event client = event (AProtocolType $ protocolTypeI @(ProtoType msg)) $ transportHost' client
+hostEvent :: forall err msg. (ProtocolTypeI (ProtoType msg), ProtocolServerClient err msg) => (AProtocolType -> TransportHost -> ACommand 'Agent 'AENone) -> Client msg -> ACommand 'Agent 'AENone
+hostEvent event = event (AProtocolType $ protocolTypeI @(ProtoType msg)) . clientTransportHost
 
-getClientConfig :: AgentMonad m => AgentClient -> (AgentConfig -> ProtocolClientConfig) -> m ProtocolClientConfig
+getClientConfig :: AgentMonad' m => AgentClient -> (AgentConfig -> ProtocolClientConfig) -> m ProtocolClientConfig
 getClientConfig AgentClient {useNetworkConfig} cfgSel = do
   cfg <- asks $ cfgSel . config
   networkConfig <- readTVarIO useNetworkConfig
@@ -489,6 +579,7 @@ closeAgentClient c = liftIO $ do
   atomically $ writeTVar (active c) False
   closeProtocolServerClients c smpClients
   closeProtocolServerClients c ntfClients
+  closeProtocolServerClients c xftpClients
   cancelActions . actions $ reconnections c
   cancelActions . actions $ asyncClients c
   cancelActions $ smpQueueMsgDeliveries c
@@ -519,16 +610,24 @@ throwWhenNoDelivery c SndQueue {server, sndId} =
   where
     k = (server, sndId)
 
-closeProtocolServerClients :: AgentClient -> (AgentClient -> TMap (TransportSession msg) (ClientVar err msg)) -> IO ()
+closeProtocolServerClients :: ProtocolServerClient err msg => AgentClient -> (AgentClient -> TMap (TransportSession msg) (ClientVar msg)) -> IO ()
 closeProtocolServerClients c clientsSel =
-  atomically (swapTVar cs M.empty) >>= mapM_ (forkIO . closeClient)
-  where
-    cs = clientsSel c
-    closeClient cVar = do
-      NetworkConfig {tcpConnectTimeout} <- readTVarIO $ useNetworkConfig c
-      tcpConnectTimeout `timeout` atomically (readTMVar cVar) >>= \case
-        Just (Right client) -> closeProtocolClient client `catchAll_` pure ()
-        _ -> pure ()
+  atomically (clientsSel c `swapTVar` M.empty) >>= mapM_ (forkIO . closeClient_ c)
+
+closeClient :: ProtocolServerClient err msg => AgentClient -> (AgentClient -> TMap (TransportSession msg) (ClientVar msg)) -> TransportSession msg -> IO ()
+closeClient c clientSel tSess =
+  atomically (TM.lookupDelete tSess $ clientSel c) >>= mapM_ (closeClient_ c)
+
+closeClient_ :: ProtocolServerClient err msg => AgentClient -> ClientVar msg -> IO ()
+closeClient_ c cVar = do
+  NetworkConfig {tcpConnectTimeout} <- readTVarIO $ useNetworkConfig c
+  tcpConnectTimeout `timeout` atomically (readTMVar cVar) >>= \case
+    Just (Right client) -> closeProtocolServerClient client `catchAll_` pure ()
+    _ -> pure ()
+
+closeXFTPServerClient :: AgentMonad' m => AgentClient -> UserId -> XFTPServer -> FileDigest -> m ()
+closeXFTPServerClient c userId server (FileDigest chunkDigest) =
+  mkTransportSession c userId server chunkDigest >>= liftIO . closeClient c xftpClients
 
 cancelActions :: (Foldable f, Monoid (f (Async ()))) => TVar (f (Async ())) -> IO ()
 cancelActions as = atomically (swapTVar as mempty) >>= mapM_ (forkIO . uninterruptibleCancel)
@@ -542,29 +641,29 @@ withLockMap_ locks key = withGetLock $ TM.lookup key locks >>= maybe newLock pur
   where
     newLock = createLock >>= \l -> TM.insert key l locks $> l
 
-withClient_ :: forall a m err msg. (AgentMonad m, ProtocolServerClient err msg) => AgentClient -> TransportSession msg -> ByteString -> (ProtocolClient err msg -> m a) -> m a
+withClient_ :: forall a m err msg. (AgentMonad m, ProtocolServerClient err msg) => AgentClient -> TransportSession msg -> ByteString -> (Client msg -> m a) -> m a
 withClient_ c tSess@(userId, srv, _) statCmd action = do
   cl <- getProtocolServerClient c tSess
-  (action cl <* stat cl "OK") `catchError` logServerError cl
+  (action cl <* stat cl "OK") `catchAgentError` logServerError cl
   where
     stat cl = liftIO . incClientStat c userId cl statCmd
-    logServerError :: ProtocolClient err msg -> AgentErrorType -> m a
+    logServerError :: Client msg -> AgentErrorType -> m a
     logServerError cl e = do
       logServer "<--" c srv "" $ strEncode e
       stat cl $ strEncode e
       throwError e
 
-withLogClient_ :: (AgentMonad m, ProtocolServerClient err msg) => AgentClient -> TransportSession msg -> EntityId -> ByteString -> (ProtocolClient err msg -> m a) -> m a
+withLogClient_ :: (AgentMonad m, ProtocolServerClient err msg) => AgentClient -> TransportSession msg -> EntityId -> ByteString -> (Client msg -> m a) -> m a
 withLogClient_ c tSess@(_, srv, _) entId cmdStr action = do
   logServer "-->" c srv entId cmdStr
   res <- withClient_ c tSess cmdStr action
   logServer "<--" c srv entId "OK"
   return res
 
-withClient :: forall m err msg a. (AgentMonad m, ProtocolServerClient err msg, ProtocolTypeI (ProtoType msg), Encoding err, Show err) => AgentClient -> TransportSession msg -> ByteString -> (ProtocolClient err msg -> ExceptT (ProtocolClientError err) IO a) -> m a
+withClient :: forall m err msg a. (AgentMonad m, ProtocolServerClient err msg) => AgentClient -> TransportSession msg -> ByteString -> (Client msg -> ExceptT (ProtocolClientError err) IO a) -> m a
 withClient c tSess statKey action = withClient_ c tSess statKey $ \client -> liftClient (clientProtocolError @err @msg) (clientServer client) $ action client
 
-withLogClient :: forall m err msg a. (AgentMonad m, ProtocolServerClient err msg, ProtocolTypeI (ProtoType msg), Encoding err, Show err) => AgentClient -> TransportSession msg -> EntityId -> ByteString -> (ProtocolClient err msg -> ExceptT (ProtocolClientError err) IO a) -> m a
+withLogClient :: forall m err msg a. (AgentMonad m, ProtocolServerClient err msg) => AgentClient -> TransportSession msg -> EntityId -> ByteString -> (Client msg -> ExceptT (ProtocolClientError err) IO a) -> m a
 withLogClient c tSess entId cmdStr action = withLogClient_ c tSess entId cmdStr $ \client -> liftClient (clientProtocolError @err @msg) (clientServer client) $ action client
 
 withSMPClient :: (AgentMonad m, SMPQueueRec q) => AgentClient -> q -> ByteString -> (SMPClient -> ExceptT SMPClientError IO a) -> m a
@@ -580,6 +679,17 @@ withSMPClient_ c q cmdStr action = do
 withNtfClient :: forall m a. AgentMonad m => AgentClient -> NtfServer -> EntityId -> ByteString -> (NtfClient -> ExceptT NtfClientError IO a) -> m a
 withNtfClient c srv = withLogClient c (0, srv, Nothing)
 
+withXFTPClient ::
+  (AgentMonad m, ProtocolServerClient err msg) =>
+  AgentClient ->
+  (UserId, ProtoServer msg, EntityId) ->
+  ByteString ->
+  (Client msg -> ExceptT (ProtocolClientError err) IO b) ->
+  m b
+withXFTPClient c (userId, srv, entityId) cmdStr action = do
+  tSess <- mkTransportSession c userId srv entityId
+  withLogClient c tSess entityId cmdStr action
+
 liftClient :: (AgentMonad m, Show err, Encoding err) => (err -> AgentErrorType) -> HostName -> ExceptT (ProtocolClientError err) IO a -> m a
 liftClient protocolError_ = liftError . protocolClientError protocolError_
 
@@ -595,24 +705,34 @@ protocolClientError protocolError_ host = \case
   e@PCECryptoError {} -> INTERNAL $ show e
   PCEIOError {} -> BROKER host NETWORK
 
-data SMPTestStep = TSConnect | TSCreateQueue | TSSecureQueue | TSDeleteQueue | TSDisconnect
+data ProtocolTestStep
+  = TSConnect
+  | TSDisconnect
+  | TSCreateQueue
+  | TSSecureQueue
+  | TSDeleteQueue
+  | TSCreateFile
+  | TSUploadFile
+  | TSDownloadFile
+  | TSCompareFile
+  | TSDeleteFile
   deriving (Eq, Show, Generic)
 
-instance ToJSON SMPTestStep where
+instance ToJSON ProtocolTestStep where
   toEncoding = J.genericToEncoding . enumJSON $ dropPrefix "TS"
   toJSON = J.genericToJSON . enumJSON $ dropPrefix "TS"
 
-data SMPTestFailure = SMPTestFailure
-  { testStep :: SMPTestStep,
+data ProtocolTestFailure = ProtocolTestFailure
+  { testStep :: ProtocolTestStep,
     testError :: AgentErrorType
   }
   deriving (Eq, Show, Generic)
 
-instance ToJSON SMPTestFailure where
+instance ToJSON ProtocolTestFailure where
   toEncoding = J.genericToEncoding J.defaultOptions
   toJSON = J.genericToJSON J.defaultOptions
 
-runSMPServerTest :: AgentMonad m => AgentClient -> UserId -> SMPServerWithAuth -> m (Maybe SMPTestFailure)
+runSMPServerTest :: AgentMonad m => AgentClient -> UserId -> SMPServerWithAuth -> m (Maybe ProtocolTestFailure)
 runSMPServerTest c userId (ProtoServerWithAuth srv auth) = do
   cfg <- getClientConfig c smpCfg
   C.SignAlg a <- asks $ cmdSignAlg . config
@@ -628,27 +748,74 @@ runSMPServerTest c userId (ProtoServerWithAuth srv auth) = do
           liftError (testErr TSSecureQueue) $ secureSMPQueue smp rpKey rcvId sKey
           liftError (testErr TSDeleteQueue) $ deleteSMPQueue smp rpKey rcvId
         ok <- tcpTimeout (networkConfig cfg) `timeout` closeProtocolClient smp
-        incClientStat c userId smp "TEST" "OK"
-        pure $ either Just (const Nothing) r <|> maybe (Just (SMPTestFailure TSDisconnect $ BROKER addr TIMEOUT)) (const Nothing) ok
+        incClientStat c userId smp "SMP_TEST" "OK"
+        pure $ either Just (const Nothing) r <|> maybe (Just (ProtocolTestFailure TSDisconnect $ BROKER addr TIMEOUT)) (const Nothing) ok
       Left e -> pure (Just $ testErr TSConnect e)
   where
     addr = B.unpack $ strEncode srv
-    testErr :: SMPTestStep -> SMPClientError -> SMPTestFailure
-    testErr step = SMPTestFailure step . protocolClientError SMP addr
+    testErr :: ProtocolTestStep -> SMPClientError -> ProtocolTestFailure
+    testErr step = ProtocolTestFailure step . protocolClientError SMP addr
 
-mkTransportSession :: AgentMonad m => AgentClient -> UserId -> ProtoServer msg -> EntityId -> m (TransportSession msg)
+runXFTPServerTest :: forall m. AgentMonad m => AgentClient -> UserId -> XFTPServerWithAuth -> m (Maybe ProtocolTestFailure)
+runXFTPServerTest c userId (ProtoServerWithAuth srv auth) = do
+  cfg <- asks $ xftpCfg . config
+  xftpNetworkConfig <- readTVarIO $ useNetworkConfig c
+  workDir <- getXFTPWorkPath
+  filePath <- getTempFilePath workDir
+  rcvPath <- getTempFilePath workDir
+  liftIO $ do
+    let tSess = (userId, srv, Nothing)
+    X.getXFTPClient tSess cfg {xftpNetworkConfig} (\_ -> pure ()) >>= \case
+      Right xftp -> do
+        (sndKey, spKey) <- liftIO $ C.generateSignatureKeyPair C.SEd25519
+        (rcvKey, rpKey) <- liftIO $ C.generateSignatureKeyPair C.SEd25519
+        createTestChunk filePath
+        digest <- liftIO $ C.sha256Hash <$> B.readFile filePath
+        let file = FileInfo {sndKey, size = chSize, digest}
+            chunkSpec = X.XFTPChunkSpec {filePath, chunkOffset = 0, chunkSize = chSize}
+        r <- runExceptT $ do
+          (sId, [rId]) <- liftError (testErr TSCreateFile) $ X.createXFTPChunk xftp spKey file [rcvKey] auth
+          liftError (testErr TSUploadFile) $ X.uploadXFTPChunk xftp spKey sId chunkSpec
+          liftError (testErr TSDownloadFile) $ X.downloadXFTPChunk xftp rpKey rId $ XFTPRcvChunkSpec rcvPath chSize digest
+          rcvDigest <- liftIO $ C.sha256Hash <$> B.readFile rcvPath
+          unless (digest == rcvDigest) $ throwError $ ProtocolTestFailure TSCompareFile $ XFTP DIGEST
+          liftError (testErr TSDeleteFile) $ X.deleteXFTPChunk xftp spKey sId
+        ok <- tcpTimeout xftpNetworkConfig `timeout` X.closeXFTPClient xftp
+        incClientStat c userId xftp "XFTP_TEST" "OK"
+        pure $ either Just (const Nothing) r <|> maybe (Just (ProtocolTestFailure TSDisconnect $ BROKER addr TIMEOUT)) (const Nothing) ok
+      Left e -> pure (Just $ testErr TSConnect e)
+  where
+    addr = B.unpack $ strEncode srv
+    testErr :: ProtocolTestStep -> XFTPClientError -> ProtocolTestFailure
+    testErr step = ProtocolTestFailure step . protocolClientError XFTP addr
+    chSize :: Integral a => a
+    chSize = kb 256
+    getTempFilePath :: FilePath -> m FilePath
+    getTempFilePath workPath = do
+      ts <- liftIO getCurrentTime
+      let isoTime = formatTime defaultTimeLocale "%Y-%m-%dT%H%M%S.%6q" ts
+      uniqueCombine workPath isoTime
+    createTestChunk :: FilePath -> IO ()
+    createTestChunk fp = B.writeFile fp =<< getRandomBytes chSize
+
+getXFTPWorkPath :: AgentMonad m => m FilePath
+getXFTPWorkPath = do
+  workDir <- readTVarIO =<< asks (xftpWorkDir . xftpAgent)
+  maybe getTemporaryDirectory pure workDir
+
+mkTransportSession :: AgentMonad' m => AgentClient -> UserId -> ProtoServer msg -> EntityId -> m (TransportSession msg)
 mkTransportSession c userId srv entityId = mkTSession userId srv entityId <$> getSessionMode c
 
 mkTSession :: UserId -> ProtoServer msg -> EntityId -> TransportSessionMode -> TransportSession msg
 mkTSession userId srv entityId mode = (userId, srv, if mode == TSMEntity then Just entityId else Nothing)
 
-mkSMPTransportSession :: (AgentMonad m, SMPQueueRec q) => AgentClient -> q -> m SMPTransportSession
+mkSMPTransportSession :: (AgentMonad' m, SMPQueueRec q) => AgentClient -> q -> m SMPTransportSession
 mkSMPTransportSession c q = mkSMPTSession q <$> getSessionMode c
 
 mkSMPTSession :: SMPQueueRec q => q -> TransportSessionMode -> SMPTransportSession
-mkSMPTSession q = mkTSession (qUserId q) (qServer q) (qConnId q)
+mkSMPTSession q = mkTSession q.userId (qServer q) q.connId
 
-getSessionMode :: AgentMonad m => AgentClient -> m TransportSessionMode
+getSessionMode :: AgentMonad' m => AgentClient -> m TransportSessionMode
 getSessionMode = fmap sessionMode . readTVarIO . useNetworkConfig
 
 newRcvQueue :: AgentMonad m => AgentClient -> UserId -> ConnId -> SMPServerWithAuth -> VersionRange -> m (RcvQueue, SMPQueueUri)
@@ -677,6 +844,7 @@ newRcvQueue c userId connId (ProtoServerWithAuth srv auth) vRange = do
             dbQueueId = 0,
             primary = True,
             dbReplaceQueueId = Nothing,
+            rcvSwchStatus = Nothing,
             smpClientVersion = maxVersion vRange,
             clientNtfCreds = Nothing,
             deleteErrors = 0
@@ -696,6 +864,7 @@ temporaryAgentError :: AgentErrorType -> Bool
 temporaryAgentError = \case
   BROKER _ NETWORK -> True
   BROKER _ TIMEOUT -> True
+  INACTIVE -> True
   _ -> False
 
 temporaryOrHostError :: AgentErrorType -> Bool
@@ -711,11 +880,13 @@ subscribeQueues c qs = do
     modifyTVar (subscrConns c) $ S.insert connId
     RQ.addQueue rq $ pendingSubs c
   u <- askUnliftIO
-  (errs <>) <$> sendTSessionBatches "SUB" 90 (subscribeQueues_ u) c qs
+  -- only "checked" queues are subscribed
+  (errs <>) <$> sendTSessionBatches "SUB" 90 id (subscribeQueues_ u) c qs'
   where
     checkQueue rq@RcvQueue {rcvId, server} = do
       prohibited <- atomically . TM.member (server, rcvId) $ getMsgLocks c
       pure $ if prohibited then Left (rq, Left $ CMD PROHIBITED) else Right rq
+    subscribeQueues_ :: UnliftIO m -> SMPClient -> NonEmpty RcvQueue -> IO (BatchResponses SMPClientError ())
     subscribeQueues_ u smp qs' = do
       rs <- sendBatch subscribeSMPQueues smp qs'
       mapM_ (uncurry $ processSubResult c) rs
@@ -723,25 +894,25 @@ subscribeQueues c qs = do
         unliftIO u $ reconnectServer c $ transportSession' smp
       pure rs
 
-type BatchResponses e = (NonEmpty (RcvQueue, Either e ()))
+type BatchResponses e r = (NonEmpty (RcvQueue, Either e r))
 
 -- statBatchSize is not used to batch the commands, only for traffic statistics
-sendTSessionBatches :: forall m. AgentMonad m => ByteString -> Int -> (SMPClient -> NonEmpty RcvQueue -> IO (BatchResponses SMPClientError)) -> AgentClient -> [RcvQueue] -> m [(RcvQueue, Either AgentErrorType ())]
-sendTSessionBatches statCmd statBatchSize action c qs =
+sendTSessionBatches :: forall m q r. AgentMonad m => ByteString -> Int -> (q -> RcvQueue) -> (SMPClient -> NonEmpty q -> IO (BatchResponses SMPClientError r)) -> AgentClient -> [q] -> m [(RcvQueue, Either AgentErrorType r)]
+sendTSessionBatches statCmd statBatchSize toRQ action c qs =
   concatMap L.toList <$> (mapConcurrently sendClientBatch =<< batchQueues)
   where
-    batchQueues :: m [(SMPTransportSession, NonEmpty RcvQueue)]
+    batchQueues :: m [(SMPTransportSession, NonEmpty q)]
     batchQueues = do
       mode <- sessionMode <$> readTVarIO (useNetworkConfig c)
       pure . M.assocs $ foldl' (batch mode) M.empty qs
       where
-        batch mode m rq =
-          let tSess = mkSMPTSession rq mode
-           in M.alter (Just . maybe [rq] (rq <|)) tSess m
-    sendClientBatch :: (SMPTransportSession, NonEmpty RcvQueue) -> m (BatchResponses AgentErrorType)
+        batch mode m q =
+          let tSess = mkSMPTSession (toRQ q) mode
+           in M.alter (Just . maybe [q] (q <|)) tSess m
+    sendClientBatch :: (SMPTransportSession, NonEmpty q) -> m (BatchResponses AgentErrorType r)
     sendClientBatch (tSess@(userId, srv, _), qs') =
       tryError (getSMPServerClient c tSess) >>= \case
-        Left e -> pure $ L.map (,Left e) qs'
+        Left e -> pure $ L.map ((,Left e) . toRQ) qs'
         Right smp -> liftIO $ do
           logServer "-->" c srv (bshow (length qs') <> " queues") statCmd
           rs <- L.map agentError <$> action smp qs'
@@ -751,9 +922,9 @@ sendTSessionBatches statCmd statBatchSize action c qs =
             agentError = second . first $ protocolClientError SMP $ clientServer smp
             statBatch =
               let n = (length qs - 1) `div` statBatchSize + 1
-               in incClientStatN c userId smp n (statCmd <> "S") "OK"
+               in incClientStatN c userId smp n statCmd "OK"
 
-sendBatch :: (SMPClient -> NonEmpty (SMP.RcvPrivateSignKey, SMP.RecipientId) -> IO (NonEmpty (Either SMPClientError ()))) -> SMPClient -> NonEmpty RcvQueue -> IO (BatchResponses SMPClientError)
+sendBatch :: (SMPClient -> NonEmpty (SMP.RcvPrivateSignKey, SMP.RecipientId) -> IO (NonEmpty (Either SMPClientError ()))) -> SMPClient -> NonEmpty RcvQueue -> IO (BatchResponses SMPClientError ())
 sendBatch smpCmdFunc smp qs = L.zip qs <$> smpCmdFunc smp (L.map queueCreds qs)
   where
     queueCreds RcvQueue {rcvPrivateKey, rcvId} = (rcvPrivateKey, rcvId)
@@ -836,16 +1007,28 @@ secureQueue c rq@RcvQueue {rcvId, rcvPrivateKey} senderKey =
   withSMPClient c rq "KEY <key>" $ \smp ->
     secureSMPQueue smp rcvPrivateKey rcvId senderKey
 
-enableQueueNotifications :: AgentMonad m => AgentClient -> RcvQueue -> NtfPublicVerifyKey -> RcvNtfPublicDhKey -> m (NotifierId, RcvNtfPublicDhKey)
+enableQueueNotifications :: AgentMonad m => AgentClient -> RcvQueue -> SMP.NtfPublicVerifyKey -> SMP.RcvNtfPublicDhKey -> m (SMP.NotifierId, SMP.RcvNtfPublicDhKey)
 enableQueueNotifications c rq@RcvQueue {rcvId, rcvPrivateKey} notifierKey rcvNtfPublicDhKey =
   withSMPClient c rq "NKEY <nkey>" $ \smp ->
     enableSMPQueueNotifications smp rcvPrivateKey rcvId notifierKey rcvNtfPublicDhKey
 
+enableQueuesNtfs :: forall m. AgentMonad m => AgentClient -> [(RcvQueue, SMP.NtfPublicVerifyKey, SMP.RcvNtfPublicDhKey)] -> m [(RcvQueue, Either AgentErrorType (SMP.NotifierId, SMP.RcvNtfPublicDhKey))]
+enableQueuesNtfs = sendTSessionBatches "NKEY" 90 fst3 enableQueues_
+  where
+    fst3 (x, _, _) = x
+    enableQueues_ :: SMPClient -> NonEmpty (RcvQueue, SMP.NtfPublicVerifyKey, SMP.RcvNtfPublicDhKey) -> IO (NonEmpty (RcvQueue, Either (ProtocolClientError ErrorType) (SMP.NotifierId, RcvNtfPublicDhKey)))
+    enableQueues_ smp qs' = L.zipWith ((,) . fst3) qs' <$> enableSMPQueuesNtfs smp (L.map queueCreds qs')
+    queueCreds :: (RcvQueue, SMP.NtfPublicVerifyKey, SMP.RcvNtfPublicDhKey) -> (SMP.RcvPrivateSignKey, SMP.RecipientId, SMP.NtfPublicVerifyKey, SMP.RcvNtfPublicDhKey)
+    queueCreds (RcvQueue {rcvPrivateKey, rcvId}, notifierKey, rcvNtfPublicDhKey) = (rcvPrivateKey, rcvId, notifierKey, rcvNtfPublicDhKey)
+
 disableQueueNotifications :: AgentMonad m => AgentClient -> RcvQueue -> m ()
 disableQueueNotifications c rq@RcvQueue {rcvId, rcvPrivateKey} =
   withSMPClient c rq "NDEL" $ \smp ->
     disableSMPQueueNotifications smp rcvPrivateKey rcvId
 
+disableQueuesNtfs :: forall m. AgentMonad m => AgentClient -> [RcvQueue] -> m [(RcvQueue, Either AgentErrorType ())]
+disableQueuesNtfs = sendTSessionBatches "NDEL" 90 id $ sendBatch disableSMPQueuesNtfs
+
 sendAck :: AgentMonad m => AgentClient -> RcvQueue -> MsgId -> m ()
 sendAck c rq@RcvQueue {rcvId, rcvPrivateKey} msgId = do
   withSMPClient c rq "ACK" $ \smp ->
@@ -867,7 +1050,7 @@ deleteQueue c rq@RcvQueue {rcvId, rcvPrivateKey} = do
     deleteSMPQueue smp rcvPrivateKey rcvId
 
 deleteQueues :: forall m. AgentMonad m => AgentClient -> [RcvQueue] -> m [(RcvQueue, Either AgentErrorType ())]
-deleteQueues = sendTSessionBatches "DEL" 90 $ sendBatch deleteSMPQueues
+deleteQueues = sendTSessionBatches "DEL" 90 id $ sendBatch deleteSMPQueues
 
 sendAgentMessage :: AgentMonad m => AgentClient -> SndQueue -> MsgFlags -> ByteString -> m ()
 sendAgentMessage c sq@SndQueue {sndId, sndPrivateKey} msgFlags agentMsg =
@@ -900,7 +1083,7 @@ agentNtfEnableCron :: AgentMonad m => AgentClient -> NtfTokenId -> NtfToken -> W
 agentNtfEnableCron c tknId NtfToken {ntfServer, ntfPrivKey} interval =
   withNtfClient c ntfServer tknId "TCRN" $ \ntf -> ntfEnableCron ntf ntfPrivKey tknId interval
 
-agentNtfCreateSubscription :: AgentMonad m => AgentClient -> NtfTokenId -> NtfToken -> SMPQueueNtf -> NtfPrivateSignKey -> m NtfSubscriptionId
+agentNtfCreateSubscription :: AgentMonad m => AgentClient -> NtfTokenId -> NtfToken -> SMPQueueNtf -> SMP.NtfPrivateSignKey -> m NtfSubscriptionId
 agentNtfCreateSubscription c tknId NtfToken {ntfServer, ntfPrivKey} smpQueue nKey =
   withNtfClient c ntfServer tknId "SNEW" $ \ntf -> ntfCreateSubscription ntf ntfPrivKey (NewNtfSub tknId smpQueue nKey)
 
@@ -912,6 +1095,45 @@ agentNtfDeleteSubscription :: AgentMonad m => AgentClient -> NtfSubscriptionId -
 agentNtfDeleteSubscription c subId NtfToken {ntfServer, ntfPrivKey} =
   withNtfClient c ntfServer subId "SDEL" $ \ntf -> ntfDeleteSubscription ntf ntfPrivKey subId
 
+agentXFTPDownloadChunk :: AgentMonad m => AgentClient -> UserId -> FileDigest -> RcvFileChunkReplica -> XFTPRcvChunkSpec -> m ()
+agentXFTPDownloadChunk c userId (FileDigest chunkDigest) RcvFileChunkReplica {server, replicaId = ChunkReplicaId fId, replicaKey} chunkSpec =
+  withXFTPClient c (userId, server, chunkDigest) "FGET" $ \xftp -> X.downloadXFTPChunk xftp replicaKey fId chunkSpec
+
+agentXFTPNewChunk :: AgentMonad m => AgentClient -> SndFileChunk -> Int -> XFTPServerWithAuth -> m NewSndChunkReplica
+agentXFTPNewChunk c SndFileChunk {userId, chunkSpec = XFTPChunkSpec {chunkSize}, digest = FileDigest chunkDigest} n (ProtoServerWithAuth srv auth) = do
+  rKeys <- xftpRcvKeys n
+  (sndKey, replicaKey) <- liftIO $ C.generateSignatureKeyPair C.SEd25519
+  let fileInfo = FileInfo {sndKey, size = fromIntegral chunkSize, digest = chunkDigest}
+  logServer "-->" c srv "" "FNEW"
+  tSess <- mkTransportSession c userId srv chunkDigest
+  (sndId, rIds) <- withClient c tSess "FNEW" $ \xftp -> X.createXFTPChunk xftp replicaKey fileInfo (L.map fst rKeys) auth
+  logServer "<--" c srv "" $ B.unwords ["SIDS", logSecret sndId]
+  pure NewSndChunkReplica {server = srv, replicaId = ChunkReplicaId sndId, replicaKey, rcvIdsKeys = L.toList $ xftpRcvIdsKeys rIds rKeys}
+
+agentXFTPUploadChunk :: AgentMonad m => AgentClient -> UserId -> FileDigest -> SndFileChunkReplica -> XFTPChunkSpec -> m ()
+agentXFTPUploadChunk c userId (FileDigest chunkDigest) SndFileChunkReplica {server, replicaId = ChunkReplicaId fId, replicaKey} chunkSpec =
+  withXFTPClient c (userId, server, chunkDigest) "FPUT" $ \xftp -> X.uploadXFTPChunk xftp replicaKey fId chunkSpec
+
+agentXFTPAddRecipients :: AgentMonad m => AgentClient -> UserId -> FileDigest -> SndFileChunkReplica -> Int -> m (NonEmpty (ChunkReplicaId, C.APrivateSignKey))
+agentXFTPAddRecipients c userId (FileDigest chunkDigest) SndFileChunkReplica {server, replicaId = ChunkReplicaId fId, replicaKey} n = do
+  rKeys <- xftpRcvKeys n
+  rIds <- withXFTPClient c (userId, server, chunkDigest) "FADD" $ \xftp -> X.addXFTPRecipients xftp replicaKey fId (L.map fst rKeys)
+  pure $ xftpRcvIdsKeys rIds rKeys
+
+agentXFTPDeleteChunk :: AgentMonad m => AgentClient -> UserId -> DeletedSndChunkReplica -> m ()
+agentXFTPDeleteChunk c userId DeletedSndChunkReplica {server, replicaId = ChunkReplicaId fId, replicaKey, chunkDigest = FileDigest chunkDigest} =
+  withXFTPClient c (userId, server, chunkDigest) "FDEL" $ \xftp -> X.deleteXFTPChunk xftp replicaKey fId
+
+xftpRcvKeys :: AgentMonad m => Int -> m (NonEmpty C.ASignatureKeyPair)
+xftpRcvKeys n = do
+  rKeys <- liftIO $ replicateM n $ C.generateSignatureKeyPair C.SEd25519
+  case L.nonEmpty rKeys of
+    Just rKeys' -> pure rKeys'
+    _ -> throwError $ INTERNAL "non-positive number of recipients"
+
+xftpRcvIdsKeys :: NonEmpty ByteString -> NonEmpty C.ASignatureKeyPair -> NonEmpty (ChunkReplicaId, C.APrivateSignKey)
+xftpRcvIdsKeys rIds rKeys = L.map ChunkReplicaId rIds `L.zip` L.map snd rKeys
+
 agentCbEncrypt :: AgentMonad m => SndQueue -> Maybe C.PublicKeyX25519 -> ByteString -> m ByteString
 agentCbEncrypt SndQueue {e2eDhSecret, smpClientVersion} e2ePubKey msg = do
   cmNonce <- liftIO C.randomCbNonce
@@ -944,11 +1166,16 @@ agentCbDecrypt dhSecret nonce msg =
 cryptoError :: C.CryptoError -> AgentErrorType
 cryptoError = \case
   C.CryptoLargeMsgError -> CMD LARGE
-  C.CryptoHeaderError _ -> AGENT A_ENCRYPTION
-  C.AESDecryptError -> AGENT A_ENCRYPTION
-  C.CBDecryptError -> AGENT A_ENCRYPTION
+  C.CryptoHeaderError _ -> AGENT A_MESSAGE -- parsing error
   C.CERatchetDuplicateMessage -> AGENT A_DUPLICATE
+  C.AESDecryptError -> c DECRYPT_AES
+  C.CBDecryptError -> c DECRYPT_CB
+  C.CERatchetHeader -> c RATCHET_HEADER
+  C.CERatchetTooManySkipped n -> c $ RATCHET_SKIPPED n
+  C.CERatchetEarlierMessage n -> c $ RATCHET_EARLIER n
   e -> INTERNAL $ show e
+  where
+    c = AGENT . A_CRYPTO
 
 endAgentOperation :: AgentClient -> AgentOperation -> STM ()
 endAgentOperation c op = endOperation c op $ case op of
@@ -979,7 +1206,7 @@ suspendOperation c op endedAction = do
 notifySuspended :: AgentClient -> STM ()
 notifySuspended c = do
   -- unsafeIOToSTM $ putStrLn "notifySuspended"
-  writeTBQueue (subQ c) ("", "", SUSPENDED)
+  writeTBQueue (subQ c) ("", "", APC SAENone SUSPENDED)
   writeTVar (agentState c) ASSuspended
 
 endOperation :: AgentClient -> AgentOperation -> STM () -> STM ()
@@ -1009,17 +1236,41 @@ agentOperationBracket c op check action =
     (\_ -> atomically $ endAgentOperation c op)
     (const action)
 
+waitUntilForeground :: AgentClient -> STM ()
+waitUntilForeground c = unlessM ((ASForeground ==) <$> readTVar (agentState c)) retry
+
 withStore' :: AgentMonad m => AgentClient -> (DB.Connection -> IO a) -> m a
-withStore' c action = withStore c $ fmap Right . action
+withStore' = withStoreCtx_' Nothing
 
 withStore :: AgentMonad m => AgentClient -> (DB.Connection -> IO (Either StoreError a)) -> m a
-withStore c action = do
+withStore = withStoreCtx_ Nothing
+
+withStoreCtx' :: AgentMonad m => String -> AgentClient -> (DB.Connection -> IO a) -> m a
+withStoreCtx' = withStoreCtx_' . Just
+
+withStoreCtx :: AgentMonad m => String -> AgentClient -> (DB.Connection -> IO (Either StoreError a)) -> m a
+withStoreCtx = withStoreCtx_ . Just
+
+withStoreCtx_' :: AgentMonad m => Maybe String -> AgentClient -> (DB.Connection -> IO a) -> m a
+withStoreCtx_' ctx_ c action = withStoreCtx_ ctx_ c $ fmap Right . action
+
+withStoreCtx_ :: AgentMonad m => Maybe String -> AgentClient -> (DB.Connection -> IO (Either StoreError a)) -> m a
+withStoreCtx_ ctx_ c action = do
   st <- asks store
-  liftEitherError storeError . agentOperationBracket c AODatabase (\_ -> pure ()) $
-    withTransaction st action `E.catch` handleInternal
+  liftEitherError storeError . agentOperationBracket c AODatabase (\_ -> pure ()) $ case ctx_ of
+    Nothing -> withTransaction st action `E.catch` handleInternal ""
+    -- uncomment to debug store performance
+    -- Just ctx -> do
+    --   t1 <- liftIO getCurrentTime
+    --   putStrLn $ "agent withStoreCtx start       :: " <> show t1 <> " :: " <> ctx
+    --   r <- withTransaction st action `E.catch` handleInternal (" (" <> ctx <> ")")
+    --   t2 <- liftIO getCurrentTime
+    --   putStrLn $ "agent withStoreCtx end         :: " <> show t2 <> " :: " <> ctx <> " :: duration=" <> show (diffToMilliseconds $ diffUTCTime t2 t1)
+    --   pure r
+    Just _ -> withTransaction st action `E.catch` handleInternal ""
   where
-    handleInternal :: E.SomeException -> IO (Either StoreError a)
-    handleInternal = pure . Left . SEInternal . bshow
+    handleInternal :: String -> E.SomeException -> IO (Either StoreError a)
+    handleInternal ctxStr e = pure . Left . SEInternal . B.pack $ show e <> ctxStr
 
 storeError :: StoreError -> AgentErrorType
 storeError = \case
@@ -1041,7 +1292,7 @@ incStat AgentClient {agentStats} n k = do
     Just v -> modifyTVar' v (+ n)
     _ -> newTVar n >>= \v -> TM.insert k v agentStats
 
-incClientStat :: AgentClient -> UserId -> ProtocolClient err msg -> ByteString -> ByteString -> IO ()
+incClientStat :: ProtocolServerClient err msg => AgentClient -> UserId -> Client msg -> ByteString -> ByteString -> IO ()
 incClientStat c userId pc = incClientStatN c userId pc 1
 
 incServerStat :: AgentClient -> UserId -> ProtocolServer p -> ByteString -> ByteString -> IO ()
@@ -1051,8 +1302,43 @@ incServerStat c userId ProtocolServer {host} cmd res = do
   where
     statsKey = AgentStatsKey {userId, host = strEncode $ L.head host, clientTs = "", cmd, res}
 
-incClientStatN :: AgentClient -> UserId -> ProtocolClient err msg -> Int -> ByteString -> ByteString -> IO ()
+incClientStatN :: ProtocolServerClient err msg => AgentClient -> UserId -> Client msg -> Int -> ByteString -> ByteString -> IO ()
 incClientStatN c userId pc n cmd res = do
   atomically $ incStat c n statsKey
   where
-    statsKey = AgentStatsKey {userId, host = strEncode $ transportHost' pc, clientTs = strEncode $ sessionTs pc, cmd, res}
+    statsKey = AgentStatsKey {userId, host = strEncode $ clientTransportHost pc, clientTs = strEncode $ clientSessionTs pc, cmd, res}
+
+userServers :: forall p. (ProtocolTypeI p, UserProtocol p) => AgentClient -> TMap UserId (NonEmpty (ProtoServerWithAuth p))
+userServers c = case protocolTypeI @p of
+  SPSMP -> smpServers c
+  SPXFTP -> xftpServers c
+
+pickServer :: forall p m. (AgentMonad' m) => NonEmpty (ProtoServerWithAuth p) -> m (ProtoServerWithAuth p)
+pickServer = \case
+  srv :| [] -> pure srv
+  servers -> do
+    gen <- asks randomServer
+    atomically $ (servers L.!!) <$> stateTVar gen (randomR (0, L.length servers - 1))
+
+getNextServer :: forall p m. (ProtocolTypeI p, UserProtocol p, AgentMonad m) => AgentClient -> UserId -> [ProtocolServer p] -> m (ProtoServerWithAuth p)
+getNextServer c userId usedSrvs = withUserServers c userId $ \srvs ->
+  case L.nonEmpty $ deleteFirstsBy sameSrvAddr' (L.toList srvs) (map noAuthSrv usedSrvs) of
+    Just srvs' -> pickServer srvs'
+    _ -> pickServer srvs
+
+withUserServers :: forall p m a. (ProtocolTypeI p, UserProtocol p, AgentMonad m) => AgentClient -> UserId -> (NonEmpty (ProtoServerWithAuth p) -> m a) -> m a
+withUserServers c userId action =
+  atomically (TM.lookup userId $ userServers c) >>= \case
+    Just srvs -> action srvs
+    _ -> throwError $ INTERNAL "unknown userId - no user servers"
+
+withNextSrv :: forall p m a. (ProtocolTypeI p, UserProtocol p, AgentMonad m) => AgentClient -> UserId -> TVar [ProtocolServer p] -> [ProtocolServer p] -> ((ProtoServerWithAuth p) -> m a) -> m a
+withNextSrv c userId usedSrvs initUsed action = do
+  used <- readTVarIO usedSrvs
+  srvAuth@(ProtoServerWithAuth srv _) <- getNextServer c userId used
+  atomically $ do
+    srvs_ <- TM.lookup userId $ userServers c
+    let unused = maybe [] ((\\ used) . map protoServer . L.toList) srvs_
+        used' = if null unused then initUsed else srv : used
+    writeTVar usedSrvs $! used'
+  action srvAuth

src/Simplex/Messaging/Agent/Env/SQLite.hs

@@ -3,27 +3,30 @@
 {-# LANGUAGE DuplicateRecordFields #-}
 {-# LANGUAGE FlexibleContexts #-}
 {-# LANGUAGE GADTs #-}
-{-# LANGUAGE LambdaCase #-}
 {-# LANGUAGE NamedFieldPuns #-}
 {-# LANGUAGE NumericUnderscores #-}
 {-# LANGUAGE RankNTypes #-}
+{-# LANGUAGE ScopedTypeVariables #-}
 {-# LANGUAGE TypeApplications #-}
 {-# OPTIONS_GHC -fno-warn-unticked-promoted-constructors #-}
 
 module Simplex.Messaging.Agent.Env.SQLite
   ( AgentMonad,
+    AgentMonad',
     AgentConfig (..),
-    AgentDatabase (..),
-    databaseFile,
     InitialAgentServers (..),
     NetworkConfig (..),
     defaultAgentConfig,
     defaultReconnectInterval,
+    tryAgentError,
+    catchAgentError,
+    agentFinally,
     Env (..),
     newSMPAgentEnv,
     createAgentStore,
     NtfSupervisor (..),
     NtfSupervisorCommand (..),
+    XFTPAgent (..),
   )
 where
 
@@ -31,15 +34,16 @@ import Control.Monad.Except
 import Control.Monad.IO.Unlift
 import Control.Monad.Reader
 import Crypto.Random
+import Data.Int (Int64)
 import Data.List.NonEmpty (NonEmpty)
 import Data.Map (Map)
 import Data.Time.Clock (NominalDiffTime, nominalDay)
 import Data.Word (Word16)
 import Network.Socket
 import Numeric.Natural
+import Simplex.FileTransfer.Client (XFTPClientConfig (..), defaultXFTPClientConfig)
 import Simplex.Messaging.Agent.Protocol
 import Simplex.Messaging.Agent.RetryInterval
-import Simplex.Messaging.Agent.Store (UserId)
 import Simplex.Messaging.Agent.Store.SQLite
 import qualified Simplex.Messaging.Agent.Store.SQLite.Migrations as Migrations
 import Simplex.Messaging.Client
@@ -47,49 +51,48 @@ import Simplex.Messaging.Client.Agent ()
 import qualified Simplex.Messaging.Crypto as C
 import Simplex.Messaging.Crypto.Ratchet (supportedE2EEncryptVRange)
 import Simplex.Messaging.Notifications.Types
-import Simplex.Messaging.Protocol (NtfServer, supportedSMPClientVRange)
+import Simplex.Messaging.Protocol (NtfServer, XFTPServer, XFTPServerWithAuth, supportedSMPClientVRange)
 import Simplex.Messaging.TMap (TMap)
 import qualified Simplex.Messaging.TMap as TM
 import Simplex.Messaging.Transport (TLS, Transport (..))
 import Simplex.Messaging.Transport.Client (defaultSMPPort)
+import Simplex.Messaging.Util (allFinally, catchAllErrors, tryAllErrors)
 import Simplex.Messaging.Version
 import System.Random (StdGen, newStdGen)
-import UnliftIO (Async)
+import UnliftIO (Async, SomeException)
 import UnliftIO.STM
 
--- | Agent monad with MonadReader Env and MonadError AgentErrorType
-type AgentMonad m = (MonadUnliftIO m, MonadReader Env m, MonadError AgentErrorType m)
+type AgentMonad' m = (MonadUnliftIO m, MonadReader Env m)
+
+type AgentMonad m = (AgentMonad' m, MonadError AgentErrorType m)
 
 data InitialAgentServers = InitialAgentServers
   { smp :: Map UserId (NonEmpty SMPServerWithAuth),
     ntf :: [NtfServer],
+    xftp :: Map UserId (NonEmpty XFTPServerWithAuth),
     netCfg :: NetworkConfig
   }
 
-data AgentDatabase
-  = AgentDB SQLiteStore
-  | AgentDBFile {dbFile :: FilePath, dbKey :: String}
-
-databaseFile :: AgentDatabase -> FilePath
-databaseFile = \case
-  AgentDB SQLiteStore {dbFilePath} -> dbFilePath
-  AgentDBFile {dbFile} -> dbFile
-
 data AgentConfig = AgentConfig
   { tcpPort :: ServiceName,
     cmdSignAlg :: C.SignAlg,
     connIdBytes :: Int,
     tbqSize :: Natural,
-    database :: AgentDatabase,
-    yesToMigrations :: Bool,
     smpCfg :: ProtocolClientConfig,
     ntfCfg :: ProtocolClientConfig,
+    xftpCfg :: XFTPClientConfig,
     reconnectInterval :: RetryInterval,
     messageRetryInterval :: RetryInterval2,
     messageTimeout :: NominalDiffTime,
     helloTimeout :: NominalDiffTime,
-    initialCleanupDelay :: Int,
-    cleanupInterval :: Int,
+    initialCleanupDelay :: Int64,
+    cleanupInterval :: Int64,
+    cleanupStepInterval :: Int,
+    storedMsgDataTTL :: NominalDiffTime,
+    rcvFilesTTL :: NominalDiffTime,
+    sndFilesTTL :: NominalDiffTime,
+    xftpNotifyErrsOnRetry :: Bool,
+    xftpMaxRecipientsPerRequest :: Int,
     deleteErrorCount :: Int,
     ntfCron :: Word16,
     ntfWorkerDelay :: Int,
@@ -129,7 +132,7 @@ defaultMessageRetryInterval =
         RetryInterval
           { initialInterval = 60_000000,
             increaseAfter = 60_000000,
-            maxInterval = 1200_000000 -- 20min
+            maxInterval = 3600_000000 -- 1 hour
           }
     }
 
@@ -140,16 +143,21 @@ defaultAgentConfig =
       cmdSignAlg = C.SignAlg C.SEd448,
       connIdBytes = 12,
       tbqSize = 64,
-      database = AgentDBFile {dbFile = "smp-agent.db", dbKey = ""},
-      yesToMigrations = False,
       smpCfg = defaultClientConfig {defaultTransport = (show defaultSMPPort, transport @TLS)},
       ntfCfg = defaultClientConfig {defaultTransport = ("443", transport @TLS)},
+      xftpCfg = defaultXFTPClientConfig,
       reconnectInterval = defaultReconnectInterval,
       messageRetryInterval = defaultMessageRetryInterval,
       messageTimeout = 2 * nominalDay,
       helloTimeout = 2 * nominalDay,
       initialCleanupDelay = 30 * 1000000, -- 30 seconds
       cleanupInterval = 30 * 60 * 1000000, -- 30 minutes
+      cleanupStepInterval = 200000, -- 200ms
+      storedMsgDataTTL = 21 * nominalDay,
+      rcvFilesTTL = 2 * nominalDay,
+      sndFilesTTL = nominalDay,
+      xftpNotifyErrsOnRetry = True,
+      xftpMaxRecipientsPerRequest = 200,
       deleteErrorCount = 10,
       ntfCron = 20, -- minutes
       ntfWorkerDelay = 100000, -- microseconds
@@ -173,21 +181,20 @@ data Env = Env
     idsDrg :: TVar ChaChaDRG,
     clientCounter :: TVar Int,
     randomServer :: TVar StdGen,
-    ntfSupervisor :: NtfSupervisor
+    ntfSupervisor :: NtfSupervisor,
+    xftpAgent :: XFTPAgent
   }
 
-newSMPAgentEnv :: (MonadUnliftIO m, MonadRandom m) => AgentConfig -> m Env
-newSMPAgentEnv config@AgentConfig {database, yesToMigrations, initialClientId} = do
-  idsDrg <- newTVarIO =<< drgNew
-  store <- case database of
-    AgentDB st -> pure st
-    AgentDBFile {dbFile, dbKey} -> liftIO $ createAgentStore dbFile dbKey yesToMigrations
+newSMPAgentEnv :: AgentConfig -> SQLiteStore -> IO Env
+newSMPAgentEnv config@AgentConfig {initialClientId} store = do
+  idsDrg <- newTVarIO =<< liftIO drgNew
   clientCounter <- newTVarIO initialClientId
   randomServer <- newTVarIO =<< liftIO newStdGen
   ntfSupervisor <- atomically . newNtfSubSupervisor $ tbqSize config
-  return Env {config, store, idsDrg, clientCounter, randomServer, ntfSupervisor}
+  xftpAgent <- atomically newXFTPAgent
+  pure Env {config, store, idsDrg, clientCounter, randomServer, ntfSupervisor, xftpAgent}
 
-createAgentStore :: FilePath -> String -> Bool -> IO SQLiteStore
+createAgentStore :: FilePath -> String -> MigrationConfirmation -> IO (Either MigrationError SQLiteStore)
 createAgentStore dbFilePath dbKey = createSQLiteStore dbFilePath dbKey Migrations.app
 
 data NtfSupervisor = NtfSupervisor
@@ -207,3 +214,35 @@ newNtfSubSupervisor qSize = do
   ntfWorkers <- TM.empty
   ntfSMPWorkers <- TM.empty
   pure NtfSupervisor {ntfTkn, ntfSubQ, ntfWorkers, ntfSMPWorkers}
+
+data XFTPAgent = XFTPAgent
+  { -- if set, XFTP file paths will be considered as relative to this directory
+    xftpWorkDir :: TVar (Maybe FilePath),
+    xftpRcvWorkers :: TMap (Maybe XFTPServer) (TMVar (), Async ()),
+    xftpSndWorkers :: TMap (Maybe XFTPServer) (TMVar (), Async ()),
+    xftpDelWorkers :: TMap XFTPServer (TMVar (), Async ())
+  }
+
+newXFTPAgent :: STM XFTPAgent
+newXFTPAgent = do
+  xftpWorkDir <- newTVar Nothing
+  xftpRcvWorkers <- TM.empty
+  xftpSndWorkers <- TM.empty
+  xftpDelWorkers <- TM.empty
+  pure XFTPAgent {xftpWorkDir, xftpRcvWorkers, xftpSndWorkers, xftpDelWorkers}
+
+tryAgentError :: AgentMonad m => m a -> m (Either AgentErrorType a)
+tryAgentError = tryAllErrors mkInternal
+{-# INLINE tryAgentError #-}
+
+catchAgentError :: AgentMonad m => m a -> (AgentErrorType -> m a) -> m a
+catchAgentError = catchAllErrors mkInternal
+{-# INLINE catchAgentError #-}
+
+agentFinally :: AgentMonad m => m a -> m b -> m a
+agentFinally = allFinally mkInternal
+{-# INLINE agentFinally #-}
+
+mkInternal :: SomeException -> AgentErrorType
+mkInternal = INTERNAL . show
+{-# INLINE mkInternal #-}

src/Simplex/Messaging/Agent/Lock.hs

@@ -14,7 +14,7 @@ createLock :: STM Lock
 createLock = newEmptyTMVar
 {-# INLINE createLock #-}
 
-withLock :: MonadUnliftIO m => TMVar String -> String -> m a -> m a
+withLock :: MonadUnliftIO m => Lock -> String -> m a -> m a
 withLock lock name =
   E.bracket_
     (atomically $ putTMVar lock name)

src/Simplex/Messaging/Agent/NtfSubSupervisor.hs

@@ -6,6 +6,8 @@
 {-# LANGUAGE ScopedTypeVariables #-}
 {-# LANGUAGE TupleSections #-}
 
+{-# OPTIONS_GHC -fno-warn-ambiguous-fields #-}
+
 module Simplex.Messaging.Agent.NtfSubSupervisor
   ( runNtfSupervisor,
     nsUpdateToken,
@@ -17,22 +19,18 @@ module Simplex.Messaging.Agent.NtfSubSupervisor
   )
 where
 
-import Control.Concurrent.Async (Async, uninterruptibleCancel)
-import Control.Concurrent.STM (stateTVar)
 import Control.Logger.Simple (logError, logInfo)
 import Control.Monad
 import Control.Monad.Except
-import Control.Monad.IO.Unlift (MonadUnliftIO)
 import Control.Monad.Reader
 import Data.Bifunctor (first)
-import Data.Fixed (Fixed (MkFixed), Pico)
 import qualified Data.Map.Strict as M
 import Data.Text (Text)
-import Data.Time (UTCTime, addUTCTime, diffUTCTime, getCurrentTime, nominalDiffTimeToSeconds)
+import Data.Time (UTCTime, addUTCTime, getCurrentTime)
+import Data.Time.Clock (diffUTCTime)
 import Simplex.Messaging.Agent.Client
 import Simplex.Messaging.Agent.Env.SQLite
-import Simplex.Messaging.Agent.Protocol (AgentErrorType (..), BrokerErrorType (..), ConnId, NotificationsMode (..))
-import qualified Simplex.Messaging.Agent.Protocol as AP
+import Simplex.Messaging.Agent.Protocol (ACommand (..), APartyCmd (..), AgentErrorType (..), BrokerErrorType (..), ConnId, NotificationsMode (..), SAEntity (..))
 import Simplex.Messaging.Agent.RetryInterval
 import Simplex.Messaging.Agent.Store
 import Simplex.Messaging.Agent.Store.SQLite
@@ -40,28 +38,27 @@ import Simplex.Messaging.Client.Agent ()
 import qualified Simplex.Messaging.Crypto as C
 import Simplex.Messaging.Notifications.Protocol (NtfSubStatus (..), NtfTknStatus (..), SMPQueueNtf (..))
 import Simplex.Messaging.Notifications.Types
-import Simplex.Messaging.Protocol
+import Simplex.Messaging.Protocol (NtfServer, ProtocolServer, SMPServer, sameSrvAddr)
 import Simplex.Messaging.TMap (TMap)
 import qualified Simplex.Messaging.TMap as TM
-import Simplex.Messaging.Util (tshow, unlessM)
+import Simplex.Messaging.Util (diffToMicroseconds, threadDelay', tshow, unlessM)
 import System.Random (randomR)
-import UnliftIO (async)
+import UnliftIO
 import UnliftIO.Concurrent (forkIO, threadDelay)
 import qualified UnliftIO.Exception as E
-import UnliftIO.STM
 
-runNtfSupervisor :: forall m. (MonadUnliftIO m, MonadReader Env m) => AgentClient -> m ()
+runNtfSupervisor :: forall m. AgentMonad' m => AgentClient -> m ()
 runNtfSupervisor c = do
   ns <- asks ntfSupervisor
   forever $ do
     cmd@(connId, _) <- atomically . readTBQueue $ ntfSubQ ns
-    handleError connId . agentOperationBracket c AONtfNetwork waitUntilActive $
+    handleErr connId . agentOperationBracket c AONtfNetwork waitUntilActive $
       runExceptT (processNtfSub c cmd) >>= \case
         Left e -> notifyErr connId e
         Right _ -> return ()
   where
-    handleError :: ConnId -> m () -> m ()
-    handleError connId = E.handle $ \(e :: E.SomeException) -> do
+    handleErr :: ConnId -> m () -> m ()
+    handleErr connId = E.handle $ \(e :: E.SomeException) -> do
       logError $ "runNtfSupervisor error " <> tshow e
       notifyErr connId e
     notifyErr connId e = notifyInternalError c connId $ "runNtfSupervisor error " <> show e
@@ -151,12 +148,12 @@ processNtfSub c (connId, cmd) = do
       atomically (TM.lookup srv ws) >>= \case
         Nothing -> do
           doWork <- newTMVarIO ()
-          worker <- async $ runWorker c srv doWork `E.finally` atomically (TM.delete srv ws)
+          worker <- async $ runWorker c srv doWork `agentFinally` atomically (TM.delete srv ws)
           atomically $ TM.insert srv (doWork, worker) ws
         Just (doWork, _) ->
           void . atomically $ tryPutTMVar doWork ()
 
-withNtfServer :: AgentMonad m => AgentClient -> (NtfServer -> m ()) -> m ()
+withNtfServer :: AgentMonad' m => AgentClient -> (NtfServer -> m ()) -> m ()
 withNtfServer c action = getNtfServer c >>= mapM_ action
 
 runNtfWorker :: forall m. AgentMonad m => AgentClient -> NtfServer -> TMVar () -> m ()
@@ -175,9 +172,9 @@ runNtfWorker c srv doWork = do
         Nothing -> noWorkToDo
         Just a@(NtfSubscription {connId}, _, _) -> do
           ri <- asks $ reconnectInterval . config
-          withRetryInterval ri $ \loop ->
+          withRetryInterval ri $ \_ loop ->
             processAction a
-              `catchError` retryOnError c "NtfWorker" loop (workerInternalError c connId . show)
+              `catchAgentError` retryOnError c "NtfWorker" loop (workerInternalError c connId . show)
     noWorkToDo = void . atomically $ tryTakeTMVar doWork
     processAction :: (NtfSubscription, NtfSubNTFAction, NtfActionTs) -> m ()
     processAction (sub@NtfSubscription {connId, smpServer, ntfSubId}, action, actionTs) = do
@@ -217,7 +214,7 @@ runNtfWorker c srv doWork = do
           NSADelete -> case ntfSubId of
             Just nSubId ->
               (getNtfToken >>= mapM_ (agentNtfDeleteSubscription c nSubId))
-                `E.finally` continueDeletion
+                `agentFinally` continueDeletion
             _ -> continueDeletion
             where
               continueDeletion = do
@@ -228,7 +225,7 @@ runNtfWorker c srv doWork = do
           NSARotate -> case ntfSubId of
             Just nSubId ->
               (getNtfToken >>= mapM_ (agentNtfDeleteSubscription c nSubId))
-                `E.finally` deleteCreate
+                `agentFinally` deleteCreate
             _ -> deleteCreate
             where
               deleteCreate = do
@@ -259,9 +256,9 @@ runNtfSMPWorker c srv doWork = do
         Nothing -> noWorkToDo
         Just a@(NtfSubscription {connId}, _, _) -> do
           ri <- asks $ reconnectInterval . config
-          withRetryInterval ri $ \loop ->
+          withRetryInterval ri $ \_ loop ->
             processAction a
-              `catchError` retryOnError c "NtfSMPWorker" loop (workerInternalError c connId . show)
+              `catchAgentError` retryOnError c "NtfSMPWorker" loop (workerInternalError c connId . show)
     noWorkToDo = void . atomically $ tryTakeTMVar doWork
     processAction :: (NtfSubscription, NtfSubSMPAction, NtfActionTs) -> m ()
     processAction (sub@NtfSubscription {connId, ntfServer}, smpAction, actionTs) = do
@@ -290,23 +287,17 @@ runNtfSMPWorker c srv doWork = do
             mapM_ (disableQueueNotifications c) rq_
             withStore' c $ \db -> deleteNtfSubscription db connId
 
-rescheduleAction :: AgentMonad m => TMVar () -> UTCTime -> UTCTime -> m Bool
+rescheduleAction :: AgentMonad' m => TMVar () -> UTCTime -> UTCTime -> m Bool
 rescheduleAction doWork ts actionTs
   | actionTs <= ts = pure False
   | otherwise = do
     void . atomically $ tryTakeTMVar doWork
     void . forkIO $ do
-      threadDelay $ diffInMicros actionTs ts
+      liftIO $ threadDelay' $ diffToMicroseconds $ diffUTCTime actionTs ts
       void . atomically $ tryPutTMVar doWork ()
     pure True
 
-fromPico :: Pico -> Integer
-fromPico (MkFixed i) = i
-
-diffInMicros :: UTCTime -> UTCTime -> Int
-diffInMicros a b = (`div` 1000000) . fromInteger . fromPico . nominalDiffTimeToSeconds $ diffUTCTime a b
-
-retryOnError :: AgentMonad m => AgentClient -> Text -> m () -> (AgentErrorType -> m ()) -> AgentErrorType -> m ()
+retryOnError :: AgentMonad' m => AgentClient -> Text -> m () -> (AgentErrorType -> m ()) -> AgentErrorType -> m ()
 retryOnError c name loop done e = do
   logError $ name <> " error: " <> tshow e
   case e of
@@ -325,10 +316,11 @@ workerInternalError c connId internalErrStr = do
   withStore' c $ \db -> setNullNtfSubscriptionAction db connId
   notifyInternalError c connId internalErrStr
 
-notifyInternalError :: (MonadUnliftIO m) => AgentClient -> ConnId -> String -> m ()
-notifyInternalError AgentClient {subQ} connId internalErrStr = atomically $ writeTBQueue subQ ("", connId, AP.ERR $ AP.INTERNAL internalErrStr)
+-- TODO change error
+notifyInternalError :: MonadUnliftIO m => AgentClient -> ConnId -> String -> m ()
+notifyInternalError AgentClient {subQ} connId internalErrStr = atomically $ writeTBQueue subQ ("", connId, APC SAEConn $ ERR $ INTERNAL internalErrStr)
 
-getNtfToken :: AgentMonad m => m (Maybe NtfToken)
+getNtfToken :: AgentMonad' m => m (Maybe NtfToken)
 getNtfToken = do
   tkn <- asks $ ntfTkn . ntfSupervisor
   readTVarIO tkn
@@ -349,17 +341,17 @@ instantNotifications = \case
   Just NtfToken {ntfTknStatus = NTActive, ntfMode = NMInstant} -> True
   _ -> False
 
-closeNtfSupervisor :: NtfSupervisor -> IO ()
+closeNtfSupervisor :: MonadUnliftIO m => NtfSupervisor -> m ()
 closeNtfSupervisor ns = do
   cancelNtfWorkers_ $ ntfWorkers ns
   cancelNtfWorkers_ $ ntfSMPWorkers ns
 
-cancelNtfWorkers_ :: TMap (ProtocolServer s) (TMVar (), Async ()) -> IO ()
+cancelNtfWorkers_ :: MonadUnliftIO m => TMap (ProtocolServer s) (TMVar (), Async ()) -> m ()
 cancelNtfWorkers_ wsVar = do
   ws <- atomically $ stateTVar wsVar (,M.empty)
   mapM_ (uninterruptibleCancel . snd) ws
 
-getNtfServer :: AgentMonad m => AgentClient -> m (Maybe NtfServer)
+getNtfServer :: AgentMonad' m => AgentClient -> m (Maybe NtfServer)
 getNtfServer c = do
   ntfServers <- readTVarIO $ ntfServers c
   case ntfServers of

src/Simplex/Messaging/Agent/RetryInterval.hs

@@ -1,26 +1,30 @@
 {-# LANGUAGE LambdaCase #-}
 {-# LANGUAGE NamedFieldPuns #-}
+{-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE ScopedTypeVariables #-}
 
 module Simplex.Messaging.Agent.RetryInterval
   ( RetryInterval (..),
     RetryInterval2 (..),
     RetryIntervalMode (..),
+    RI2State (..),
     withRetryInterval,
     withRetryLock2,
+    updateRetryInterval2,
   )
 where
 
-import Control.Concurrent (forkIO, threadDelay)
+import Control.Concurrent (forkIO)
 import Control.Monad (void)
 import Control.Monad.IO.Class (MonadIO, liftIO)
-import Simplex.Messaging.Util (whenM)
+import Data.Int (Int64)
+import Simplex.Messaging.Util (threadDelay', whenM)
 import UnliftIO.STM
 
 data RetryInterval = RetryInterval
-  { initialInterval :: Int,
-    increaseAfter :: Int,
-    maxInterval :: Int
+  { initialInterval :: Int64,
+    increaseAfter :: Int64,
+    maxInterval :: Int64
   }
 
 data RetryInterval2 = RetryInterval2
@@ -28,27 +32,40 @@ data RetryInterval2 = RetryInterval2
     riFast :: RetryInterval
   }
 
-data RetryIntervalMode = RISlow | RIFast
-  deriving (Eq)
+data RI2State = RI2State
+  { slowInterval :: Int64,
+    fastInterval :: Int64
+  }
+  deriving (Show)
 
-withRetryInterval :: forall m. MonadIO m => RetryInterval -> (m () -> m ()) -> m ()
+updateRetryInterval2 :: RI2State -> RetryInterval2 -> RetryInterval2
+updateRetryInterval2 RI2State {slowInterval, fastInterval} RetryInterval2 {riSlow, riFast} =
+  RetryInterval2
+    { riSlow = riSlow {initialInterval = slowInterval, increaseAfter = 0},
+      riFast = riFast {initialInterval = fastInterval, increaseAfter = 0}
+    }
+
+data RetryIntervalMode = RISlow | RIFast
+  deriving (Eq, Show)
+
+withRetryInterval :: forall m a. MonadIO m => RetryInterval -> (Int64 -> m a -> m a) -> m a
 withRetryInterval ri action = callAction 0 $ initialInterval ri
   where
-    callAction :: Int -> Int -> m ()
-    callAction elapsed delay = action loop
+    callAction :: Int64 -> Int64 -> m a
+    callAction elapsed delay = action delay loop
       where
         loop = do
-          liftIO $ threadDelay delay
+          liftIO $ threadDelay' delay
           let elapsed' = elapsed + delay
           callAction elapsed' $ nextDelay elapsed' delay ri
 
 -- This function allows action to toggle between slow and fast retry intervals.
-withRetryLock2 :: forall m. MonadIO m => RetryInterval2 -> TMVar () -> ((RetryIntervalMode -> m ()) -> m ()) -> m ()
+withRetryLock2 :: forall m. MonadIO m => RetryInterval2 -> TMVar () -> (RI2State -> (RetryIntervalMode -> m ()) -> m ()) -> m ()
 withRetryLock2 RetryInterval2 {riSlow, riFast} lock action =
   callAction (0, initialInterval riSlow) (0, initialInterval riFast)
   where
-    callAction :: (Int, Int) -> (Int, Int) -> m ()
-    callAction slow fast = action loop
+    callAction :: (Int64, Int64) -> (Int64, Int64) -> m ()
+    callAction slow fast = action (RI2State (snd slow) (snd fast)) loop
       where
         loop = \case
           RISlow -> run slow riSlow (`callAction` fast)
@@ -56,17 +73,18 @@ withRetryLock2 RetryInterval2 {riSlow, riFast} lock action =
         run (elapsed, delay) ri call = do
           wait delay
           let elapsed' = elapsed + delay
-          call (elapsed', nextDelay elapsed' delay ri)
+              delay' = nextDelay elapsed' delay ri
+          call (elapsed', delay')
         wait delay = do
           waiting <- newTVarIO True
           _ <- liftIO . forkIO $ do
-            threadDelay delay
+            threadDelay' delay
             atomically $ whenM (readTVar waiting) $ void $ tryPutTMVar lock ()
           atomically $ do
             takeTMVar lock
             writeTVar waiting False
 
-nextDelay :: Int -> Int -> RetryInterval -> Int
+nextDelay :: Int64 -> Int64 -> RetryInterval -> Int64
 nextDelay elapsed delay RetryInterval {increaseAfter, maxInterval} =
   if elapsed < increaseAfter || delay == maxInterval
     then delay

src/Simplex/Messaging/Agent/Server.hs

@@ -11,7 +11,7 @@ module Simplex.Messaging.Agent.Server
 where
 
 import Control.Logger.Simple (logInfo)
-import Control.Monad.Except
+import Control.Monad
 import Control.Monad.IO.Unlift (MonadUnliftIO)
 import Control.Monad.Reader
 import Crypto.Random (MonadRandom)
@@ -21,8 +21,9 @@ import Data.Text.Encoding (decodeUtf8)
 import Simplex.Messaging.Agent
 import Simplex.Messaging.Agent.Env.SQLite
 import Simplex.Messaging.Agent.Protocol
+import Simplex.Messaging.Agent.Store.SQLite (SQLiteStore)
 import Simplex.Messaging.Transport (ATransport (..), TProxy, Transport (..), simplexMQVersion)
-import Simplex.Messaging.Transport.Server (loadTLSServerParams, runTransportServer)
+import Simplex.Messaging.Transport.Server (loadTLSServerParams, runTransportServer, defaultTransportServerConfig)
 import Simplex.Messaging.Util (bshow)
 import UnliftIO.Async (race_)
 import qualified UnliftIO.Exception as E
@@ -31,24 +32,23 @@ import UnliftIO.STM
 -- | Runs an SMP agent as a TCP service using passed configuration.
 --
 -- See a full agent executable here: https://github.com/simplex-chat/simplexmq/blob/master/apps/smp-agent/Main.hs
-runSMPAgent :: (MonadRandom m, MonadUnliftIO m) => ATransport -> AgentConfig -> InitialAgentServers -> m ()
-runSMPAgent t cfg initServers = do
-  started <- newEmptyTMVarIO
-  runSMPAgentBlocking t started cfg initServers
+runSMPAgent :: (MonadRandom m, MonadUnliftIO m) => ATransport -> AgentConfig -> InitialAgentServers -> SQLiteStore -> m ()
+runSMPAgent t cfg initServers store =
+  runSMPAgentBlocking t cfg initServers store =<< newEmptyTMVarIO
 
 -- | Runs an SMP agent as a TCP service using passed configuration with signalling.
 --
 -- This function uses passed TMVar to signal when the server is ready to accept TCP requests (True)
 -- and when it is disconnected from the TCP socket once the server thread is killed (False).
-runSMPAgentBlocking :: (MonadRandom m, MonadUnliftIO m) => ATransport -> TMVar Bool -> AgentConfig -> InitialAgentServers -> m ()
-runSMPAgentBlocking (ATransport t) started cfg@AgentConfig {tcpPort, caCertificateFile, certificateFile, privateKeyFile} initServers = do
-  runReaderT (smpAgent t) =<< newSMPAgentEnv cfg
+runSMPAgentBlocking :: (MonadRandom m, MonadUnliftIO m) => ATransport -> AgentConfig -> InitialAgentServers -> SQLiteStore -> TMVar Bool -> m ()
+runSMPAgentBlocking (ATransport t) cfg@AgentConfig {tcpPort, caCertificateFile, certificateFile, privateKeyFile} initServers store started = do
+  liftIO (newSMPAgentEnv cfg store) >>= runReaderT (smpAgent t)
   where
     smpAgent :: forall c m'. (Transport c, MonadUnliftIO m', MonadReader Env m') => TProxy c -> m' ()
     smpAgent _ = do
       -- tlsServerParams is not in Env to avoid breaking functional API w/t key and certificate generation
       tlsServerParams <- liftIO $ loadTLSServerParams caCertificateFile certificateFile privateKeyFile
-      runTransportServer started tcpPort tlsServerParams True $ \(h :: c) -> do
+      runTransportServer started tcpPort tlsServerParams defaultTransportServerConfig $ \(h :: c) -> do
         liftIO . putLn h $ "Welcome to SMP agent v" <> B.pack simplexMQVersion
         c <- getAgentClient initServers
         logConnection c True
@@ -60,10 +60,10 @@ connectClient h c = race_ (send h c) (receive h c)
 
 receive :: forall c m. (Transport c, MonadUnliftIO m) => c -> AgentClient -> m ()
 receive h c@AgentClient {rcvQ, subQ} = forever $ do
-  (corrId, connId, cmdOrErr) <- tGet SClient h
+  (corrId, entId, cmdOrErr) <- tGet SClient h
   case cmdOrErr of
-    Right cmd -> write rcvQ (corrId, connId, cmd)
-    Left e -> write subQ (corrId, connId, ERR e)
+    Right cmd -> write rcvQ (corrId, entId, cmd)
+    Left e -> write subQ (corrId, entId, APC SAEConn $ ERR e)
   where
     write :: TBQueue (ATransmission p) -> ATransmission p -> m ()
     write q t = do
@@ -77,5 +77,5 @@ send h c@AgentClient {subQ} = forever $ do
   logClient c "<--" t
 
 logClient :: MonadUnliftIO m => AgentClient -> ByteString -> ATransmission a -> m ()
-logClient AgentClient {clientId} dir (corrId, connId, cmd) = do
+logClient AgentClient {clientId} dir (corrId, connId, APC _ cmd) = do
   logInfo . decodeUtf8 $ B.unwords [bshow clientId, dir, "A :", corrId, connId, B.takeWhile (/= ' ') $ serializeCommand cmd]

src/Simplex/Messaging/Agent/Store.hs

@@ -1,11 +1,14 @@
+{-# LANGUAGE ConstraintKinds #-}
 {-# LANGUAGE DataKinds #-}
 {-# LANGUAGE DeriveAnyClass #-}
 {-# LANGUAGE DuplicateRecordFields #-}
+{-# LANGUAGE FlexibleContexts #-}
 {-# LANGUAGE GADTs #-}
 {-# LANGUAGE KindSignatures #-}
 {-# LANGUAGE LambdaCase #-}
 {-# LANGUAGE MultiParamTypeClasses #-}
 {-# LANGUAGE NamedFieldPuns #-}
+{-# LANGUAGE OverloadedRecordDot #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE ScopedTypeVariables #-}
 {-# LANGUAGE StandaloneDeriving #-}
@@ -21,9 +24,12 @@ import Data.Kind (Type)
 import Data.List (find)
 import Data.List.NonEmpty (NonEmpty)
 import qualified Data.List.NonEmpty as L
+import Data.Maybe (isJust)
 import Data.Time (UTCTime)
 import Data.Type.Equality
+import GHC.Records (HasField)
 import Simplex.Messaging.Agent.Protocol
+import Simplex.Messaging.Agent.RetryInterval (RI2State)
 import qualified Simplex.Messaging.Crypto as C
 import Simplex.Messaging.Crypto.Ratchet (RatchetX448)
 import Simplex.Messaging.Encoding.String
@@ -34,7 +40,6 @@ import Simplex.Messaging.Protocol
     NotifierId,
     NtfPrivateSignKey,
     NtfPublicVerifyKey,
-    QueueId,
     RcvDhSecret,
     RcvNtfDhSecret,
     RcvPrivateSignKey,
@@ -65,12 +70,13 @@ data RcvQueue = RcvQueue
     sndId :: SMP.SenderId,
     -- | queue status
     status :: QueueStatus,
-    -- | database queue ID (within connection), can be Nothing for old queues
+    -- | database queue ID (within connection)
     dbQueueId :: Int64,
     -- | True for a primary or a next primary queue of the connection (next if dbReplaceQueueId is set)
     primary :: Bool,
     -- | database queue ID to replace, Nothing if this queue is not replacing another, `Just Nothing` is used for replacing old queues
     dbReplaceQueueId :: Maybe Int64,
+    rcvSwchStatus :: Maybe RcvSwitchStatus,
     -- | SMP client version
     smpClientVersion :: Version,
     -- | credentials used in context of notifications
@@ -79,6 +85,22 @@ data RcvQueue = RcvQueue
   }
   deriving (Eq, Show)
 
+rcvQueueInfo :: RcvQueue -> RcvQueueInfo
+rcvQueueInfo rq@RcvQueue {server, rcvSwchStatus} =
+  RcvQueueInfo {rcvServer = server, rcvSwitchStatus = rcvSwchStatus, canAbortSwitch = canAbortRcvSwitch rq}
+
+canAbortRcvSwitch :: RcvQueue -> Bool
+canAbortRcvSwitch = maybe False canAbort . rcvSwchStatus
+  where
+    canAbort = \case
+      RSSwitchStarted -> True
+      RSSendingQADD -> True
+      -- if switch is in RSSendingQUSE, a race condition with sender deleting the original queue is possible
+      RSSendingQUSE -> False
+      -- if switch is in RSReceivedMessage status, aborting switch (deleting new queue)
+      -- will break the connection because the sender would have original queue deleted
+      RSReceivedMessage -> False
+
 data ClientNtfCreds = ClientNtfCreds
   { -- | key pair to be used by the notification server to sign transmissions
     ntfPublicKey :: NtfPublicVerifyKey,
@@ -106,32 +128,33 @@ data SndQueue = SndQueue
     e2eDhSecret :: C.DhSecretX25519,
     -- | queue status
     status :: QueueStatus,
-    -- | database queue ID (within connection), can be Nothing for old queues
+    -- | database queue ID (within connection)
     dbQueueId :: Int64,
     -- | True for a primary or a next primary queue of the connection (next if dbReplaceQueueId is set)
     primary :: Bool,
     -- | ID of the queue this one is replacing
     dbReplaceQueueId :: Maybe Int64,
+    sndSwchStatus :: Maybe SndSwitchStatus,
     -- | SMP client version
     smpClientVersion :: Version
   }
   deriving (Eq, Show)
 
+sndQueueInfo :: SndQueue -> SndQueueInfo
+sndQueueInfo SndQueue {server, sndSwchStatus} =
+  SndQueueInfo {sndServer = server, sndSwitchStatus = sndSwchStatus}
+
 instance SMPQueue RcvQueue where
   qServer RcvQueue {server} = server
   {-# INLINE qServer #-}
-  qAddress RcvQueue {server, rcvId} = (server, rcvId)
-  {-# INLINE qAddress #-}
-  sameQueue addr q = sameQAddress addr (qAddress q)
-  {-# INLINE sameQueue #-}
+  queueId RcvQueue {rcvId} = rcvId
+  {-# INLINE queueId #-}
 
 instance SMPQueue SndQueue where
   qServer SndQueue {server} = server
   {-# INLINE qServer #-}
-  qAddress SndQueue {server, sndId} = (server, sndId)
-  {-# INLINE qAddress #-}
-  sameQueue addr q = sameQAddress addr (qAddress q)
-  {-# INLINE sameQueue #-}
+  queueId SndQueue {sndId} = sndId
+  {-# INLINE queueId #-}
 
 findQ :: SMPQueue q => (SMPServer, SMP.QueueId) -> NonEmpty q -> Maybe q
 findQ = find . sameQueue
@@ -154,26 +177,21 @@ findRQ :: (SMPServer, SMP.SenderId) -> NonEmpty RcvQueue -> Maybe RcvQueue
 findRQ sAddr = find $ sameQAddress sAddr . sndAddress
 {-# INLINE findRQ #-}
 
-class SMPQueue q => SMPQueueRec q where
-  qUserId :: q -> UserId
-  qConnId :: q -> ConnId
-  queueId :: q -> QueueId
+switchingRQ :: NonEmpty RcvQueue -> Maybe RcvQueue
+switchingRQ = find $ isJust . rcvSwchStatus
+{-# INLINE switchingRQ #-}
 
-instance SMPQueueRec RcvQueue where
-  qUserId = userId
-  {-# INLINE qUserId #-}
-  qConnId = connId
-  {-# INLINE qConnId #-}
-  queueId = rcvId
-  {-# INLINE queueId #-}
+updatedQs :: SMPQueueRec q => q -> NonEmpty q -> NonEmpty q
+updatedQs q = L.map $ \q' -> if q.dbQueueId == q'.dbQueueId then q else q'
+{-# INLINE updatedQs #-}
 
-instance SMPQueueRec SndQueue where
-  qUserId = userId
-  {-# INLINE qUserId #-}
-  qConnId = connId
-  {-# INLINE qConnId #-}
-  queueId = sndId
-  {-# INLINE queueId #-}
+type SMPQueueRec q =
+  ( SMPQueue q,
+    HasField "userId" q UserId,
+    HasField "connId" q ConnId,
+    HasField "dbQueueId" q Int64,
+    HasField "dbReplaceQueueId" q (Maybe Int64)
+  )
 
 -- * Connection types
 
@@ -201,14 +219,22 @@ deriving instance Eq (Connection d)
 
 deriving instance Show (Connection d)
 
-connData :: Connection d -> ConnData
-connData = \case
+toConnData :: Connection d -> ConnData
+toConnData = \case
   NewConnection cData -> cData
   RcvConnection cData _ -> cData
   SndConnection cData _ -> cData
   DuplexConnection cData _ _ -> cData
   ContactConnection cData _ -> cData
 
+updateConnection :: ConnData -> Connection d -> Connection d
+updateConnection cData = \case
+  NewConnection _ -> NewConnection cData
+  RcvConnection _ rq -> RcvConnection cData rq
+  SndConnection _ sq -> SndConnection cData sq
+  DuplexConnection _ rqs sqs -> DuplexConnection cData rqs sqs
+  ContactConnection _ rq -> ContactConnection cData rq
+
 data SConnType :: ConnType -> Type where
   SCNew :: SConnType CNew
   SCRcv :: SConnType CRcv
@@ -251,10 +277,28 @@ data ConnData = ConnData
     connAgentVersion :: Version,
     enableNtfs :: Bool,
     duplexHandshake :: Maybe Bool, -- added in agent protocol v2
-    deleted :: Bool
+    lastExternalSndId :: PrevExternalSndId,
+    deleted :: Bool,
+    ratchetSyncState :: RatchetSyncState
   }
   deriving (Eq, Show)
 
+-- this function should be mirrored in the clients
+ratchetSyncAllowed :: ConnData -> Bool
+ratchetSyncAllowed cData@ConnData {ratchetSyncState} =
+  ratchetSyncSupported' cData && (ratchetSyncState `elem` ([RSAllowed, RSRequired] :: [RatchetSyncState]))
+
+ratchetSyncSupported' :: ConnData -> Bool
+ratchetSyncSupported' ConnData {connAgentVersion} = connAgentVersion >= 3
+
+messageRcptsSupported :: ConnData -> Bool
+messageRcptsSupported ConnData {connAgentVersion} = connAgentVersion >= 4
+
+-- this function should be mirrored in the clients
+ratchetSyncSendProhibited :: ConnData -> Bool
+ratchetSyncSendProhibited ConnData {ratchetSyncState} =
+  ratchetSyncState `elem` ([RSRequired, RSStarted, RSAgreed] :: [RatchetSyncState])
+
 data PendingCommand = PendingCommand
   { corrId :: ACorrId,
     userId :: UserId,
@@ -264,8 +308,6 @@ data PendingCommand = PendingCommand
 
 data AgentCmdType = ACClient | ACInternal
 
-type UserId = Int64
-
 instance StrEncoding AgentCmdType where
   strEncode = \case
     ACClient -> "CLIENT"
@@ -277,20 +319,20 @@ instance StrEncoding AgentCmdType where
       _ -> fail "bad AgentCmdType"
 
 data AgentCommand
-  = AClientCommand (ACommand 'Client)
+  = AClientCommand (APartyCmd 'Client)
   | AInternalCommand InternalCommand
 
 instance StrEncoding AgentCommand where
   strEncode = \case
-    AClientCommand cmd -> strEncode (ACClient, Str $ serializeCommand cmd)
+    AClientCommand (APC _ cmd) -> strEncode (ACClient, Str $ serializeCommand cmd)
     AInternalCommand cmd -> strEncode (ACInternal, cmd)
   strP =
     strP_ >>= \case
-      ACClient -> AClientCommand <$> ((\(ACmd _ cmd) -> checkParty cmd) <$?> dbCommandP)
+      ACClient -> AClientCommand <$> ((\(ACmd _ e cmd) -> checkParty $ APC e cmd) <$?> dbCommandP)
       ACInternal -> AInternalCommand <$> strP
 
 data AgentCommandTag
-  = AClientCommandTag (ACommandTag 'Client)
+  = AClientCommandTag (APartyCmdTag 'Client)
   | AInternalCommandTag InternalCommandTag
   deriving (Show)
 
@@ -309,6 +351,7 @@ data InternalCommand
   | ICAllowSecure SMP.RecipientId SMP.SndPublicVerifyKey
   | ICDuplexSecure SMP.RecipientId SMP.SndPublicVerifyKey
   | ICDeleteConn
+  | ICDeleteRcvQueue SMP.RecipientId
   | ICQSecure SMP.RecipientId SMP.SndPublicVerifyKey
   | ICQDelete SMP.RecipientId
 
@@ -318,6 +361,7 @@ data InternalCommandTag
   | ICAllowSecure_
   | ICDuplexSecure_
   | ICDeleteConn_
+  | ICDeleteRcvQueue_
   | ICQSecure_
   | ICQDelete_
   deriving (Show)
@@ -329,6 +373,7 @@ instance StrEncoding InternalCommand where
     ICAllowSecure rId sndKey -> strEncode (ICAllowSecure_, rId, sndKey)
     ICDuplexSecure rId sndKey -> strEncode (ICDuplexSecure_, rId, sndKey)
     ICDeleteConn -> strEncode ICDeleteConn_
+    ICDeleteRcvQueue rId -> strEncode (ICDeleteRcvQueue_, rId)
     ICQSecure rId senderKey -> strEncode (ICQSecure_, rId, senderKey)
     ICQDelete rId -> strEncode (ICQDelete_, rId)
   strP =
@@ -338,6 +383,7 @@ instance StrEncoding InternalCommand where
       ICAllowSecure_ -> ICAllowSecure <$> _strP <*> _strP
       ICDuplexSecure_ -> ICDuplexSecure <$> _strP <*> _strP
       ICDeleteConn_ -> pure ICDeleteConn
+      ICDeleteRcvQueue_ -> ICDeleteRcvQueue <$> _strP
       ICQSecure_ -> ICQSecure <$> _strP <*> _strP
       ICQDelete_ -> ICQDelete <$> _strP
 
@@ -348,6 +394,7 @@ instance StrEncoding InternalCommandTag where
     ICAllowSecure_ -> "ALLOW_SECURE"
     ICDuplexSecure_ -> "DUPLEX_SECURE"
     ICDeleteConn_ -> "DELETE_CONN"
+    ICDeleteRcvQueue_ -> "DELETE_RCV_QUEUE"
     ICQSecure_ -> "QSECURE"
     ICQDelete_ -> "QDELETE"
   strP =
@@ -357,13 +404,14 @@ instance StrEncoding InternalCommandTag where
       "ALLOW_SECURE" -> pure ICAllowSecure_
       "DUPLEX_SECURE" -> pure ICDuplexSecure_
       "DELETE_CONN" -> pure ICDeleteConn_
+      "DELETE_RCV_QUEUE" -> pure ICDeleteRcvQueue_
       "QSECURE" -> pure ICQSecure_
       "QDELETE" -> pure ICQDelete_
       _ -> fail "bad InternalCommandTag"
 
 agentCommandTag :: AgentCommand -> AgentCommandTag
 agentCommandTag = \case
-  AClientCommand cmd -> AClientCommandTag $ aCommandTag cmd
+  AClientCommand cmd -> AClientCommandTag $ aPartyCmdTag cmd
   AInternalCommand cmd -> AInternalCommandTag $ internalCmdTag cmd
 
 internalCmdTag :: InternalCommand -> InternalCommandTag
@@ -373,6 +421,7 @@ internalCmdTag = \case
   ICAllowSecure {} -> ICAllowSecure_
   ICDuplexSecure {} -> ICDuplexSecure_
   ICDeleteConn -> ICDeleteConn_
+  ICDeleteRcvQueue {} -> ICDeleteRcvQueue_
   ICQSecure {} -> ICQSecure_
   ICQDelete _ -> ICQDelete_
 
@@ -429,13 +478,17 @@ data RcvMsgData = RcvMsgData
     msgBody :: MsgBody,
     internalRcvId :: InternalRcvId,
     internalHash :: MsgHash,
-    externalPrevSndHash :: MsgHash
+    externalPrevSndHash :: MsgHash,
+    encryptedMsgHash :: MsgHash
   }
 
 data RcvMsg = RcvMsg
   { internalId :: InternalId,
     msgMeta :: MsgMeta,
+    msgType :: AgentMessageType,
     msgBody :: MsgBody,
+    internalHash :: MsgHash,
+    msgReceipt :: Maybe MsgReceipt, -- if this message is a delivery receipt
     userAck :: Bool
   }
 
@@ -450,11 +503,20 @@ data SndMsgData = SndMsgData
     prevMsgHash :: MsgHash
   }
 
+data SndMsg = SndMsg
+  { internalId :: InternalId,
+    internalSndId :: InternalSndId,
+    msgType :: AgentMessageType,
+    internalHash :: MsgHash,
+    msgReceipt :: Maybe MsgReceipt
+  }
+
 data PendingMsgData = PendingMsgData
   { msgId :: InternalId,
     msgType :: AgentMessageType,
     msgFlags :: MsgFlags,
     msgBody :: MsgBody,
+    msgRetryState :: Maybe RI2State,
     internalTs :: InternalTs
   }
   deriving (Show)
@@ -535,4 +597,10 @@ data StoreError
     SEX3dhKeysNotFound
   | -- | Used to wrap agent errors inside store operations to avoid race conditions
     SEAgentError AgentErrorType
+  | -- | XFTP Server not found.
+    SEXFTPServerNotFound
+  | -- | XFTP File not found.
+    SEFileNotFound
+  | -- | XFTP Deleted snd chunk replica not found.
+    SEDeletedSndChunkReplicaNotFound
   deriving (Eq, Show, Exception)

src/Simplex/Messaging/Agent/Store/SQLite/Common.hs

@@ -0,0 +1,71 @@
+{-# LANGUAGE DuplicateRecordFields #-}
+{-# LANGUAGE NamedFieldPuns #-}
+{-# LANGUAGE ScopedTypeVariables #-}
+
+module Simplex.Messaging.Agent.Store.SQLite.Common
+  ( SQLiteStore (..),
+    withConnection,
+    withConnection',
+    withTransaction,
+    withTransaction',
+    withTransactionCtx,
+    dbBusyLoop,
+  )
+where
+
+import Control.Concurrent (threadDelay)
+import Data.Time.Clock (diffUTCTime, getCurrentTime)
+import Database.SQLite.Simple (SQLError)
+import qualified Database.SQLite.Simple as SQL
+import qualified Simplex.Messaging.Agent.Store.SQLite.DB as DB
+import Simplex.Messaging.Util (diffToMilliseconds)
+import UnliftIO.Exception (bracket)
+import qualified UnliftIO.Exception as E
+import UnliftIO.STM
+
+data SQLiteStore = SQLiteStore
+  { dbFilePath :: FilePath,
+    dbEncrypted :: TVar Bool,
+    dbConnection :: TMVar DB.Connection,
+    dbNew :: Bool
+  }
+
+withConnection :: SQLiteStore -> (DB.Connection -> IO a) -> IO a
+withConnection SQLiteStore {dbConnection} =
+  bracket
+    (atomically $ takeTMVar dbConnection)
+    (atomically . putTMVar dbConnection)
+
+withConnection' :: SQLiteStore -> (SQL.Connection -> IO a) -> IO a
+withConnection' st action = withConnection st $ action . DB.conn
+
+withTransaction :: SQLiteStore -> (DB.Connection -> IO a) -> IO a
+withTransaction = withTransactionCtx Nothing
+
+withTransaction' :: SQLiteStore -> (SQL.Connection -> IO a) -> IO a
+withTransaction' st action = withTransaction st $ action . DB.conn
+
+withTransactionCtx :: Maybe String -> SQLiteStore -> (DB.Connection -> IO a) -> IO a
+withTransactionCtx ctx_ st action = withConnection st $ dbBusyLoop . transactionWithCtx
+  where
+    transactionWithCtx db@DB.Connection {conn} = case ctx_ of
+      Nothing -> SQL.withImmediateTransaction conn $ action db
+      Just ctx -> do
+        t1 <- getCurrentTime
+        r <- SQL.withImmediateTransaction conn $ action db
+        t2 <- getCurrentTime
+        putStrLn $ "withTransactionCtx start :: " <> show t1 <> " :: " <> ctx
+        putStrLn $ "withTransactionCtx end   :: " <> show t2 <> " :: " <> ctx <> " :: duration=" <> show (diffToMilliseconds $ diffUTCTime t2 t1)
+        pure r
+
+dbBusyLoop :: forall a. IO a -> IO a
+dbBusyLoop action = loop 500 3000000
+  where
+    loop :: Int -> Int -> IO a
+    loop t tLim =
+      action `E.catch` \(e :: SQLError) ->
+        if tLim > t && SQL.sqlError e == SQL.ErrorBusy
+          then do
+            threadDelay t
+            loop (t * 9 `div` 8) (tLim - t)
+          else E.throwIO e

src/Simplex/Messaging/Agent/Store/SQLite/DB.hs

@@ -0,0 +1,101 @@
+{-# LANGUAGE DeriveGeneric #-}
+{-# LANGUAGE NamedFieldPuns #-}
+{-# LANGUAGE StrictData #-}
+
+module Simplex.Messaging.Agent.Store.SQLite.DB
+  ( Connection (..),
+    SlowQueryStats (..),
+    open,
+    close,
+    execute,
+    execute_,
+    executeNamed,
+    executeMany,
+    query,
+    query_,
+    queryNamed,
+  )
+where
+
+import Control.Concurrent.STM
+import Control.Monad (when)
+import Data.Aeson (ToJSON (..))
+import qualified Data.Aeson as J
+import Data.Int (Int64)
+import Data.Time (diffUTCTime, getCurrentTime)
+import Database.SQLite.Simple (FromRow, NamedParam, Query, ToRow)
+import qualified Database.SQLite.Simple as SQL
+import GHC.Generics (Generic)
+import Simplex.Messaging.TMap (TMap)
+import qualified Simplex.Messaging.TMap as TM
+import Simplex.Messaging.Util (diffToMilliseconds)
+
+data Connection = Connection
+  { conn :: SQL.Connection,
+    slow :: TMap Query SlowQueryStats
+  }
+
+data SlowQueryStats = SlowQueryStats
+  { count :: Int64,
+    timeMax :: Int64,
+    timeAvg :: Int64
+  }
+  deriving (Show, Generic)
+
+instance ToJSON SlowQueryStats where toEncoding = J.genericToEncoding J.defaultOptions
+
+timeIt :: TMap Query SlowQueryStats -> Query -> IO a -> IO a
+timeIt slow sql a = do
+  t <- getCurrentTime
+  r <- a
+  t' <- getCurrentTime
+  let diff = diffToMilliseconds $ diffUTCTime t' t
+  atomically $ when (diff > 50) $ TM.alter (updateQueryStats diff) sql slow
+  pure r
+  where
+    updateQueryStats :: Int64 -> Maybe SlowQueryStats -> Maybe SlowQueryStats
+    updateQueryStats diff Nothing = Just $ SlowQueryStats 1 diff diff
+    updateQueryStats diff (Just SlowQueryStats {count, timeMax, timeAvg}) =
+      Just $
+        SlowQueryStats
+          { count = count + 1,
+            timeMax = max timeMax diff,
+            timeAvg = (timeAvg * count + diff) `div` (count + 1)
+          }
+
+open :: String -> IO Connection
+open f = do
+  conn <- SQL.open f
+  slow <- atomically $ TM.empty
+  pure Connection {conn, slow}
+
+close :: Connection -> IO ()
+close = SQL.close . conn
+
+execute :: ToRow q => Connection -> Query -> q -> IO ()
+execute Connection {conn, slow} sql = timeIt slow sql . SQL.execute conn sql
+{-# INLINE execute #-}
+
+execute_ :: Connection -> Query -> IO ()
+execute_ Connection {conn, slow} sql = timeIt slow sql $ SQL.execute_ conn sql
+{-# INLINE execute_ #-}
+
+executeNamed :: Connection -> Query -> [NamedParam] -> IO ()
+executeNamed Connection {conn, slow} sql = timeIt slow sql . SQL.executeNamed conn sql
+{-# INLINE executeNamed #-}
+
+executeMany :: ToRow q => Connection -> Query -> [q] -> IO ()
+executeMany Connection {conn, slow} sql = timeIt slow sql . SQL.executeMany conn sql
+{-# INLINE executeMany #-}
+
+query :: (ToRow q, FromRow r) => Connection -> Query -> q -> IO [r]
+query Connection {conn, slow} sql = timeIt slow sql . SQL.query conn sql
+{-# INLINE query #-}
+
+query_ :: FromRow r => Connection -> Query -> IO [r]
+query_ Connection {conn, slow} sql = timeIt slow sql $ SQL.query_ conn sql
+{-# INLINE query_ #-}
+
+queryNamed :: FromRow r => Connection -> Query -> [NamedParam] -> IO [r]
+queryNamed Connection {conn, slow} sql = timeIt slow sql . SQL.queryNamed conn sql
+{-# INLINE queryNamed #-}

src/Simplex/Messaging/Agent/Store/SQLite/Migrations.hs

@@ -1,25 +1,38 @@
+{-# LANGUAGE DeriveGeneric #-}
 {-# LANGUAGE LambdaCase #-}
 {-# LANGUAGE NamedFieldPuns #-}
 {-# LANGUAGE OverloadedLists #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE QuasiQuotes #-}
 {-# LANGUAGE ScopedTypeVariables #-}
+{-# LANGUAGE StrictData #-}
 {-# LANGUAGE TemplateHaskell #-}
 {-# LANGUAGE TupleSections #-}
 
 module Simplex.Messaging.Agent.Store.SQLite.Migrations
   ( Migration (..),
+    MigrationsToRun (..),
+    MTRError (..),
+    DownMigration (..),
     app,
     initialize,
     get,
     run,
+    getCurrent,
+    mtrErrorDescription,
+    -- for unit tests
+    migrationsToRun,
+    toDownMigration,
   )
 where
 
 import Control.Monad (forM_, when)
+import Data.Aeson (ToJSON)
+import qualified Data.Aeson as J
 import Data.List (intercalate, sortOn)
 import Data.List.NonEmpty (NonEmpty)
 import qualified Data.Map as M
+import Data.Maybe (isNothing, mapMaybe)
 import Data.Text (Text)
 import Data.Text.Encoding (decodeLatin1)
 import Data.Time.Clock (getCurrentTime)
@@ -27,7 +40,9 @@ import Database.SQLite.Simple (Connection, Only (..), Query (..))
 import qualified Database.SQLite.Simple as DB
 import Database.SQLite.Simple.QQ (sql)
 import qualified Database.SQLite3 as SQLite3
+import GHC.Generics (Generic)
 import Simplex.Messaging.Agent.Protocol (extraSMPServerHosts)
+import Simplex.Messaging.Agent.Store.SQLite.Common
 import Simplex.Messaging.Agent.Store.SQLite.Migrations.M20220101_initial
 import Simplex.Messaging.Agent.Store.SQLite.Migrations.M20220301_snd_queue_keys
 import Simplex.Messaging.Agent.Store.SQLite.Migrations.M20220322_notifications
@@ -41,67 +56,137 @@ import Simplex.Messaging.Agent.Store.SQLite.Migrations.M20230110_users
 import Simplex.Messaging.Agent.Store.SQLite.Migrations.M20230117_fkey_indexes
 import Simplex.Messaging.Agent.Store.SQLite.Migrations.M20230120_delete_errors
 import Simplex.Messaging.Agent.Store.SQLite.Migrations.M20230217_server_key_hash
+import Simplex.Messaging.Agent.Store.SQLite.Migrations.M20230223_files
+import Simplex.Messaging.Agent.Store.SQLite.Migrations.M20230320_retry_state
+import Simplex.Messaging.Agent.Store.SQLite.Migrations.M20230401_snd_files
+import Simplex.Messaging.Agent.Store.SQLite.Migrations.M20230510_files_pending_replicas_indexes
+import Simplex.Messaging.Agent.Store.SQLite.Migrations.M20230516_encrypted_rcv_message_hashes
+import Simplex.Messaging.Agent.Store.SQLite.Migrations.M20230531_switch_status
+import Simplex.Messaging.Agent.Store.SQLite.Migrations.M20230615_ratchet_sync
+import Simplex.Messaging.Agent.Store.SQLite.Migrations.M20230701_delivery_receipts
+import Simplex.Messaging.Agent.Store.SQLite.Migrations.M20230720_delete_expired_messages
+import Simplex.Messaging.Agent.Store.SQLite.Migrations.M20230722_indexes
+import Simplex.Messaging.Agent.Store.SQLite.Migrations.M20230814_indexes
 import Simplex.Messaging.Encoding.String
+import Simplex.Messaging.Parsers (dropPrefix, sumTypeJSON)
 import Simplex.Messaging.Transport.Client (TransportHost)
 
-data Migration = Migration {name :: String, up :: Text}
-  deriving (Show)
+data Migration = Migration {name :: String, up :: Text, down :: Maybe Text}
+  deriving (Eq, Show)
 
-schemaMigrations :: [(String, Query)]
+schemaMigrations :: [(String, Query, Maybe Query)]
 schemaMigrations =
-  [ ("20220101_initial", m20220101_initial),
-    ("20220301_snd_queue_keys", m20220301_snd_queue_keys),
-    ("20220322_notifications", m20220322_notifications),
-    ("20220607_v2", m20220608_v2),
-    ("m20220625_v2_ntf_mode", m20220625_v2_ntf_mode),
-    ("m20220811_onion_hosts", m20220811_onion_hosts),
-    ("m20220817_connection_ntfs", m20220817_connection_ntfs),
-    ("m20220905_commands", m20220905_commands),
-    ("m20220915_connection_queues", m20220915_connection_queues),
-    ("m20230110_users", m20230110_users),
-    ("m20230117_fkey_indexes", m20230117_fkey_indexes),
-    ("m20230120_delete_errors", m20230120_delete_errors),
-    ("m20230217_server_key_hash", m20230217_server_key_hash)
+  [ ("20220101_initial", m20220101_initial, Nothing),
+    ("20220301_snd_queue_keys", m20220301_snd_queue_keys, Nothing),
+    ("20220322_notifications", m20220322_notifications, Nothing),
+    ("20220607_v2", m20220608_v2, Nothing),
+    ("m20220625_v2_ntf_mode", m20220625_v2_ntf_mode, Nothing),
+    ("m20220811_onion_hosts", m20220811_onion_hosts, Nothing),
+    ("m20220817_connection_ntfs", m20220817_connection_ntfs, Nothing),
+    ("m20220905_commands", m20220905_commands, Nothing),
+    ("m20220915_connection_queues", m20220915_connection_queues, Nothing),
+    ("m20230110_users", m20230110_users, Nothing),
+    ("m20230117_fkey_indexes", m20230117_fkey_indexes, Nothing),
+    ("m20230120_delete_errors", m20230120_delete_errors, Nothing),
+    ("m20230217_server_key_hash", m20230217_server_key_hash, Nothing),
+    ("m20230223_files", m20230223_files, Just down_m20230223_files),
+    ("m20230320_retry_state", m20230320_retry_state, Just down_m20230320_retry_state),
+    ("m20230401_snd_files", m20230401_snd_files, Just down_m20230401_snd_files),
+    ("m20230510_files_pending_replicas_indexes", m20230510_files_pending_replicas_indexes, Just down_m20230510_files_pending_replicas_indexes),
+    ("m20230516_encrypted_rcv_message_hashes", m20230516_encrypted_rcv_message_hashes, Just down_m20230516_encrypted_rcv_message_hashes),
+    ("m20230531_switch_status", m20230531_switch_status, Just down_m20230531_switch_status),
+    ("m20230615_ratchet_sync", m20230615_ratchet_sync, Just down_m20230615_ratchet_sync),
+    ("m20230701_delivery_receipts", m20230701_delivery_receipts, Just down_m20230701_delivery_receipts),
+    ("m20230720_delete_expired_messages", m20230720_delete_expired_messages, Just down_m20230720_delete_expired_messages),
+    ("m20230722_indexes", m20230722_indexes, Just down_m20230722_indexes),
+    ("m20230814_indexes", m20230814_indexes, Just down_m20230814_indexes)
   ]
 
 -- | The list of migrations in ascending order by date
 app :: [Migration]
 app = sortOn name $ map migration schemaMigrations
   where
-    migration (name, query) = Migration {name = name, up = fromQuery query}
+    migration (name, up, down) = Migration {name, up = fromQuery up, down = fromQuery <$> down}
 
-get :: Connection -> [Migration] -> IO (Either String [Migration])
-get conn migrations =
-  migrationsToRun migrations . map fromOnly
-    <$> DB.query_ conn "SELECT name FROM migrations ORDER BY name ASC;"
+get :: SQLiteStore -> [Migration] -> IO (Either MTRError MigrationsToRun)
+get st migrations = migrationsToRun migrations <$> withTransaction' st getCurrent
 
-run :: Connection -> [Migration] -> IO ()
-run conn ms = forM_ ms $ \Migration {name, up} -> do
-  when (name == "m20220811_onion_hosts") updateServers
-  DB.withImmediateTransaction conn $ insert name >> execSQL up
+getCurrent :: Connection -> IO [Migration]
+getCurrent db = map toMigration <$> DB.query_ db "SELECT name, down FROM migrations ORDER BY name ASC;"
   where
-    insert name = DB.execute conn "INSERT INTO migrations (name, ts) VALUES (?, ?);" . (name,) =<< getCurrentTime
-    execSQL = SQLite3.exec $ DB.connectionHandle conn
-    updateServers = forM_ (M.assocs extraSMPServerHosts) $ \(h, h') ->
-      DB.withImmediateTransaction conn $
-        let hs = decodeLatin1 . strEncode $ ([h, h'] :: NonEmpty TransportHost)
-         in DB.execute conn "UPDATE servers SET host = ? WHERE host = ?" (hs, decodeLatin1 $ strEncode h)
+    toMigration (name, down) = Migration {name, up = "", down}
 
-initialize :: Connection -> IO ()
-initialize conn =
-  DB.execute_
-    conn
-    [sql|
-      CREATE TABLE IF NOT EXISTS migrations (
-        name TEXT NOT NULL,
-        ts TEXT NOT NULL,
-        PRIMARY KEY (name)
-      );
-    |]
+run :: SQLiteStore -> MigrationsToRun -> IO ()
+run st = \case
+  MTRUp [] -> pure ()
+  MTRUp ms -> mapM_ runUp ms >> withConnection' st (`execSQL` "VACUUM;")
+  MTRDown ms -> mapM_ runDown $ reverse ms
+  MTRNone -> pure ()
+  where
+    runUp Migration {name, up, down} = withTransaction' st $ \db -> do
+      when (name == "m20220811_onion_hosts") $ updateServers db
+      insert db >> execSQL db up
+      where
+        insert db = DB.execute db "INSERT INTO migrations (name, down, ts) VALUES (?,?,?)" . (name,down,) =<< getCurrentTime
+        updateServers db = forM_ (M.assocs extraSMPServerHosts) $ \(h, h') ->
+          let hs = decodeLatin1 . strEncode $ ([h, h'] :: NonEmpty TransportHost)
+           in DB.execute db "UPDATE servers SET host = ? WHERE host = ?" (hs, decodeLatin1 $ strEncode h)
+    runDown DownMigration {downName, downQuery} = withTransaction' st $ \db -> do
+      execSQL db downQuery
+      DB.execute db "DELETE FROM migrations WHERE name = ?" (Only downName)
+    execSQL db = SQLite3.exec $ DB.connectionHandle db
 
-migrationsToRun :: [Migration] -> [String] -> Either String [Migration]
-migrationsToRun appMs [] = Right appMs
-migrationsToRun [] dbMs = Left $ "database version is newer than the app: " <> intercalate ", " dbMs
+initialize :: SQLiteStore -> IO ()
+initialize st = withTransaction' st $ \db -> do
+  cs :: [Text] <- map fromOnly <$> DB.query_ db "SELECT name FROM pragma_table_info('migrations')"
+  case cs of
+    [] -> createMigrations db
+    _ -> when ("down" `notElem` cs) $ DB.execute_ db "ALTER TABLE migrations ADD COLUMN down TEXT"
+  where
+    createMigrations db =
+      DB.execute_
+        db
+        [sql|
+          CREATE TABLE IF NOT EXISTS migrations (
+            name TEXT NOT NULL,
+            ts TEXT NOT NULL,
+            down TEXT,
+            PRIMARY KEY (name)
+          );
+        |]
+
+data DownMigration = DownMigration {downName :: String, downQuery :: Text}
+  deriving (Eq, Show)
+
+toDownMigration :: Migration -> Maybe DownMigration
+toDownMigration Migration {name, down} = DownMigration name <$> down
+
+data MigrationsToRun = MTRUp [Migration] | MTRDown [DownMigration] | MTRNone
+  deriving (Eq, Show)
+
+data MTRError
+  = MTRENoDown {dbMigrations :: [String]}
+  | MTREDifferent {appMigration :: String, dbMigration :: String}
+  deriving (Eq, Show, Generic)
+
+instance ToJSON MTRError where
+  toJSON = J.genericToJSON . sumTypeJSON $ dropPrefix "MTRE"
+  toEncoding = J.genericToEncoding . sumTypeJSON $ dropPrefix "MTRE"
+
+mtrErrorDescription :: MTRError -> String
+mtrErrorDescription = \case
+  MTRENoDown ms -> "database version is newer than the app, but no down migration for: " <> intercalate ", " ms
+  MTREDifferent a d -> "different migration in the app/database: " <> a <> " / " <> d
+
+migrationsToRun :: [Migration] -> [Migration] -> Either MTRError MigrationsToRun
+migrationsToRun [] [] = Right MTRNone
+migrationsToRun appMs [] = Right $ MTRUp appMs
+migrationsToRun [] dbMs
+  | length dms == length dbMs = Right $ MTRDown dms
+  | otherwise = Left $ MTRENoDown $ mapMaybe nameNoDown dbMs
+  where
+    dms = mapMaybe toDownMigration dbMs
+    nameNoDown m = if isNothing (down m) then Just $ name m else Nothing
 migrationsToRun (a : as) (d : ds)
-  | name a == d = migrationsToRun as ds
-  | otherwise = Left $ "different migration in the app/database: " <> name a <> " / " <> d
+  | name a == name d = migrationsToRun as ds
+  | otherwise = Left $ MTREDifferent (name a) (name d)

src/Simplex/Messaging/Agent/Store/SQLite/Migrations/M20230223_files.hs

@@ -0,0 +1,89 @@
+{-# LANGUAGE QuasiQuotes #-}
+
+module Simplex.Messaging.Agent.Store.SQLite.Migrations.M20230223_files where
+
+import Database.SQLite.Simple (Query)
+import Database.SQLite.Simple.QQ (sql)
+
+m20230223_files :: Query
+m20230223_files =
+  [sql|
+CREATE TABLE xftp_servers (
+  xftp_server_id INTEGER PRIMARY KEY,
+  xftp_host TEXT NOT NULL,
+  xftp_port TEXT NOT NULL,
+  xftp_key_hash BLOB NOT NULL,
+  created_at TEXT NOT NULL DEFAULT (datetime('now')),
+  updated_at TEXT NOT NULL DEFAULT (datetime('now')),
+  UNIQUE(xftp_host, xftp_port, xftp_key_hash)
+);
+
+CREATE TABLE rcv_files (
+  rcv_file_id INTEGER PRIMARY KEY,
+  rcv_file_entity_id BLOB NOT NULL,
+  user_id INTEGER NOT NULL REFERENCES users ON DELETE CASCADE,
+  size INTEGER NOT NULL,
+  digest BLOB NOT NULL,
+  key BLOB NOT NULL,
+  nonce BLOB NOT NULL,
+  chunk_size INTEGER NOT NULL,
+  prefix_path TEXT NOT NULL,
+  tmp_path TEXT,
+  save_path TEXT NOT NULL,
+  status TEXT NOT NULL,
+  deleted INTEGER NOT NULL DEFAULT 0,
+  error TEXT,
+  created_at TEXT NOT NULL DEFAULT (datetime('now')),
+  updated_at TEXT NOT NULL DEFAULT (datetime('now')),
+  UNIQUE(rcv_file_entity_id)
+);
+
+CREATE INDEX idx_rcv_files_user_id ON rcv_files(user_id);
+
+CREATE TABLE rcv_file_chunks (
+  rcv_file_chunk_id INTEGER PRIMARY KEY,
+  rcv_file_id INTEGER NOT NULL REFERENCES rcv_files ON DELETE CASCADE,
+  chunk_no INTEGER NOT NULL,
+  chunk_size INTEGER NOT NULL,
+  digest BLOB NOT NULL,
+  tmp_path TEXT,
+  created_at TEXT NOT NULL DEFAULT (datetime('now')),
+  updated_at TEXT NOT NULL DEFAULT (datetime('now'))
+);
+
+CREATE INDEX idx_rcv_file_chunks_rcv_file_id ON rcv_file_chunks(rcv_file_id);
+
+CREATE TABLE rcv_file_chunk_replicas (
+  rcv_file_chunk_replica_id INTEGER PRIMARY KEY,
+  rcv_file_chunk_id INTEGER NOT NULL REFERENCES rcv_file_chunks ON DELETE CASCADE,
+  replica_number INTEGER NOT NULL,
+  xftp_server_id INTEGER NOT NULL REFERENCES xftp_servers ON DELETE CASCADE,
+  replica_id BLOB NOT NULL,
+  replica_key BLOB NOT NULL,
+  received INTEGER NOT NULL DEFAULT 0,
+  delay INTEGER,
+  retries INTEGER NOT NULL DEFAULT 0,
+  created_at TEXT NOT NULL DEFAULT (datetime('now')),
+  updated_at TEXT NOT NULL DEFAULT (datetime('now'))
+);
+
+CREATE INDEX idx_rcv_file_chunk_replicas_rcv_file_chunk_id ON rcv_file_chunk_replicas(rcv_file_chunk_id);
+CREATE INDEX idx_rcv_file_chunk_replicas_xftp_server_id ON rcv_file_chunk_replicas(xftp_server_id);
+|]
+
+-- this is for tests, older versions do not support down migrations
+down_m20230223_files :: Query
+down_m20230223_files =
+  [sql|
+DROP INDEX idx_rcv_file_chunk_replicas_xftp_server_id;
+DROP INDEX idx_rcv_file_chunk_replicas_rcv_file_chunk_id;
+DROP TABLE rcv_file_chunk_replicas;
+
+DROP INDEX idx_rcv_file_chunks_rcv_file_id;
+DROP TABLE rcv_file_chunks;
+
+DROP INDEX idx_rcv_files_user_id;
+DROP TABLE rcv_files;
+
+DROP TABLE xftp_servers;
+|]

src/Simplex/Messaging/Agent/Store/SQLite/Migrations/M20230320_retry_state.hs

@@ -0,0 +1,21 @@
+{-# LANGUAGE QuasiQuotes #-}
+
+module Simplex.Messaging.Agent.Store.SQLite.Migrations.M20230320_retry_state where
+
+import Database.SQLite.Simple (Query)
+import Database.SQLite.Simple.QQ (sql)
+
+m20230320_retry_state :: Query
+m20230320_retry_state =
+  [sql|
+ALTER TABLE snd_messages ADD COLUMN retry_int_slow INTEGER;
+ALTER TABLE snd_messages ADD COLUMN retry_int_fast INTEGER;
+|]
+
+-- this is for tests, older versions do not support down migrations
+down_m20230320_retry_state :: Query
+down_m20230320_retry_state =
+  [sql|
+ALTER TABLE snd_messages DROP COLUMN retry_int_fast;
+ALTER TABLE snd_messages DROP COLUMN retry_int_slow;
+|]

src/Simplex/Messaging/Agent/Store/SQLite/Migrations/M20230401_snd_files.hs

@@ -0,0 +1,107 @@
+{-# LANGUAGE QuasiQuotes #-}
+
+module Simplex.Messaging.Agent.Store.SQLite.Migrations.M20230401_snd_files where
+
+import Database.SQLite.Simple (Query)
+import Database.SQLite.Simple.QQ (sql)
+
+m20230401_snd_files :: Query
+m20230401_snd_files =
+  [sql|
+CREATE TABLE snd_files (
+  snd_file_id INTEGER PRIMARY KEY,
+  snd_file_entity_id BLOB NOT NULL,
+  user_id INTEGER NOT NULL REFERENCES users ON DELETE CASCADE,
+  num_recipients INTEGER NOT NULL,
+  digest BLOB,
+  key BLOB NOT NUll,
+  nonce BLOB NOT NUll,
+  path TEXT NOT NULL,
+  prefix_path TEXT,
+  status TEXT NOT NULL,
+  deleted INTEGER NOT NULL DEFAULT 0,
+  error TEXT,
+  created_at TEXT NOT NULL DEFAULT (datetime('now')),
+  updated_at TEXT NOT NULL DEFAULT (datetime('now'))
+);
+
+CREATE INDEX idx_snd_files_user_id ON snd_files(user_id);
+
+CREATE TABLE snd_file_chunks (
+  snd_file_chunk_id INTEGER PRIMARY KEY,
+  snd_file_id INTEGER NOT NULL REFERENCES snd_files ON DELETE CASCADE,
+  chunk_no INTEGER NOT NULL,
+  chunk_offset INTEGER NOT NULL,
+  chunk_size INTEGER NOT NULL,
+  digest BLOB NOT NULL,
+  created_at TEXT NOT NULL DEFAULT (datetime('now')),
+  updated_at TEXT NOT NULL DEFAULT (datetime('now'))
+);
+
+CREATE INDEX idx_snd_file_chunks_snd_file_id ON snd_file_chunks(snd_file_id);
+
+CREATE TABLE snd_file_chunk_replicas (
+  snd_file_chunk_replica_id INTEGER PRIMARY KEY,
+  snd_file_chunk_id INTEGER NOT NULL REFERENCES snd_file_chunks ON DELETE CASCADE,
+  replica_number INTEGER NOT NULL,
+  xftp_server_id INTEGER NOT NULL REFERENCES xftp_servers ON DELETE CASCADE,
+  replica_id BLOB NOT NULL,
+  replica_key BLOB NOT NULL,
+  replica_status TEXT NOT NULL,
+  delay INTEGER,
+  retries INTEGER NOT NULL DEFAULT 0,
+  created_at TEXT NOT NULL DEFAULT (datetime('now')),
+  updated_at TEXT NOT NULL DEFAULT (datetime('now'))
+);
+
+CREATE INDEX idx_snd_file_chunk_replicas_snd_file_chunk_id ON snd_file_chunk_replicas(snd_file_chunk_id);
+CREATE INDEX idx_snd_file_chunk_replicas_xftp_server_id ON snd_file_chunk_replicas(xftp_server_id);
+
+CREATE TABLE snd_file_chunk_replica_recipients (
+  snd_file_chunk_replica_recipient_id INTEGER PRIMARY KEY,
+  snd_file_chunk_replica_id INTEGER NOT NULL REFERENCES snd_file_chunk_replicas ON DELETE CASCADE,
+  rcv_replica_id BLOB NOT NULL,
+  rcv_replica_key BLOB NOT NULL,
+  created_at TEXT NOT NULL DEFAULT (datetime('now')),
+  updated_at TEXT NOT NULL DEFAULT (datetime('now'))
+);
+
+CREATE INDEX idx_snd_file_chunk_replica_recipients_snd_file_chunk_replica_id ON snd_file_chunk_replica_recipients(snd_file_chunk_replica_id);
+
+CREATE TABLE deleted_snd_chunk_replicas (
+  deleted_snd_chunk_replica_id INTEGER PRIMARY KEY,
+  user_id INTEGER NOT NULL REFERENCES users ON DELETE CASCADE,
+  xftp_server_id INTEGER NOT NULL REFERENCES xftp_servers ON DELETE CASCADE,
+  replica_id BLOB NOT NULL,
+  replica_key BLOB NOT NULL,
+  chunk_digest BLOB NOT NULL,
+  delay INTEGER,
+  retries INTEGER NOT NULL DEFAULT 0,
+  created_at TEXT NOT NULL DEFAULT (datetime('now')),
+  updated_at TEXT NOT NULL DEFAULT (datetime('now'))
+);
+
+CREATE INDEX idx_deleted_snd_chunk_replicas_user_id ON deleted_snd_chunk_replicas(user_id);
+CREATE INDEX idx_deleted_snd_chunk_replicas_xftp_server_id ON deleted_snd_chunk_replicas(xftp_server_id);
+|]
+
+down_m20230401_snd_files :: Query
+down_m20230401_snd_files =
+  [sql|
+DROP INDEX idx_deleted_snd_chunk_replicas_xftp_server_id;
+DROP INDEX idx_deleted_snd_chunk_replicas_user_id;
+DROP TABLE deleted_snd_chunk_replicas;
+
+DROP INDEX idx_snd_file_chunk_replica_recipients_snd_file_chunk_replica_id;
+DROP TABLE snd_file_chunk_replica_recipients;
+
+DROP INDEX idx_snd_file_chunk_replicas_snd_file_chunk_id;
+DROP INDEX idx_snd_file_chunk_replicas_xftp_server_id;
+DROP TABLE snd_file_chunk_replicas;
+
+DROP INDEX idx_snd_file_chunks_snd_file_id;
+DROP TABLE snd_file_chunks;
+
+DROP INDEX idx_snd_files_user_id;
+DROP TABLE snd_files;
+|]

src/Simplex/Messaging/Agent/Store/SQLite/Migrations/M20230510_files_pending_replicas_indexes.hs

@@ -0,0 +1,22 @@
+{-# LANGUAGE QuasiQuotes #-}
+
+module Simplex.Messaging.Agent.Store.SQLite.Migrations.M20230510_files_pending_replicas_indexes where
+
+import Database.SQLite.Simple (Query)
+import Database.SQLite.Simple.QQ (sql)
+
+m20230510_files_pending_replicas_indexes :: Query
+m20230510_files_pending_replicas_indexes =
+  [sql|
+CREATE INDEX idx_rcv_file_chunk_replicas_pending ON rcv_file_chunk_replicas(received, replica_number);
+CREATE INDEX idx_snd_file_chunk_replicas_pending ON snd_file_chunk_replicas(replica_status, replica_number);
+CREATE INDEX idx_deleted_snd_chunk_replicas_pending ON deleted_snd_chunk_replicas(created_at);
+|]
+
+down_m20230510_files_pending_replicas_indexes :: Query
+down_m20230510_files_pending_replicas_indexes =
+  [sql|
+DROP INDEX idx_deleted_snd_chunk_replicas_pending;
+DROP INDEX idx_snd_file_chunk_replicas_pending;
+DROP INDEX idx_rcv_file_chunk_replicas_pending;
+|]

src/Simplex/Messaging/Agent/Store/SQLite/Migrations/M20230516_encrypted_rcv_message_hashes.hs

@@ -0,0 +1,28 @@
+{-# LANGUAGE QuasiQuotes #-}
+
+module Simplex.Messaging.Agent.Store.SQLite.Migrations.M20230516_encrypted_rcv_message_hashes where
+
+import Database.SQLite.Simple (Query)
+import Database.SQLite.Simple.QQ (sql)
+
+m20230516_encrypted_rcv_message_hashes :: Query
+m20230516_encrypted_rcv_message_hashes =
+  [sql|
+CREATE TABLE encrypted_rcv_message_hashes(
+  encrypted_rcv_message_hash_id INTEGER PRIMARY KEY,
+  conn_id BLOB NOT NULL REFERENCES connections ON DELETE CASCADE,
+  hash BLOB NOT NULL,
+  created_at TEXT NOT NULL DEFAULT (datetime('now')),
+  updated_at TEXT NOT NULL DEFAULT (datetime('now'))
+);
+
+CREATE INDEX idx_encrypted_rcv_message_hashes_hash ON encrypted_rcv_message_hashes(conn_id, hash);
+|]
+
+down_m20230516_encrypted_rcv_message_hashes :: Query
+down_m20230516_encrypted_rcv_message_hashes =
+  [sql|
+DROP INDEX idx_encrypted_rcv_message_hashes_hash;
+
+DROP TABLE encrypted_rcv_message_hashes;
+|]

src/Simplex/Messaging/Agent/Store/SQLite/Migrations/M20230531_switch_status.hs

@@ -0,0 +1,22 @@
+{-# LANGUAGE QuasiQuotes #-}
+
+module Simplex.Messaging.Agent.Store.SQLite.Migrations.M20230531_switch_status where
+
+import Database.SQLite.Simple (Query)
+import Database.SQLite.Simple.QQ (sql)
+
+m20230531_switch_status :: Query
+m20230531_switch_status =
+  [sql|
+ALTER TABLE rcv_queues ADD COLUMN switch_status TEXT;
+ALTER TABLE rcv_queues ADD COLUMN deleted INTEGER NOT NULL DEFAULT 0;
+ALTER TABLE snd_queues ADD COLUMN switch_status TEXT;
+|]
+
+down_m20230531_switch_status :: Query
+down_m20230531_switch_status =
+  [sql|
+ALTER TABLE snd_queues DROP COLUMN switch_status;
+ALTER TABLE rcv_queues DROP COLUMN deleted;
+ALTER TABLE rcv_queues DROP COLUMN switch_status;
+|]

src/Simplex/Messaging/Agent/Store/SQLite/Migrations/M20230615_ratchet_sync.hs

@@ -0,0 +1,41 @@
+{-# LANGUAGE QuasiQuotes #-}
+
+module Simplex.Messaging.Agent.Store.SQLite.Migrations.M20230615_ratchet_sync where
+
+import Database.SQLite.Simple (Query)
+import Database.SQLite.Simple.QQ (sql)
+
+-- Ratchet public keys are saved when ratchet re-synchronization is started - upon receiving other party's public keys,
+-- keys are compared to determine ratchet initialization ordering for both parties.
+-- This solves a possible race when both parties start ratchet re-synchronization at the same time.
+m20230615_ratchet_sync :: Query
+m20230615_ratchet_sync =
+  [sql|
+ALTER TABLE connections ADD COLUMN ratchet_sync_state TEXT NOT NULL DEFAULT 'ok';
+
+ALTER TABLE ratchets ADD COLUMN x3dh_pub_key_1 BLOB;
+ALTER TABLE ratchets ADD COLUMN x3dh_pub_key_2 BLOB;
+
+CREATE TABLE processed_ratchet_key_hashes(
+  processed_ratchet_key_hash_id INTEGER PRIMARY KEY,
+  conn_id BLOB NOT NULL REFERENCES connections ON DELETE CASCADE,
+  hash BLOB NOT NULL,
+  created_at TEXT NOT NULL DEFAULT (datetime('now')),
+  updated_at TEXT NOT NULL DEFAULT (datetime('now'))
+);
+
+CREATE INDEX idx_processed_ratchet_key_hashes_hash ON processed_ratchet_key_hashes(conn_id, hash);
+|]
+
+down_m20230615_ratchet_sync :: Query
+down_m20230615_ratchet_sync =
+  [sql|
+DROP INDEX idx_processed_ratchet_key_hashes_hash;
+
+DROP TABLE processed_ratchet_key_hashes;
+
+ALTER TABLE ratchets DROP COLUMN x3dh_pub_key_2;
+ALTER TABLE ratchets DROP COLUMN x3dh_pub_key_1;
+
+ALTER TABLE connections DROP COLUMN ratchet_sync_state;
+|]

src/Simplex/Messaging/Agent/Store/SQLite/Migrations/M20230701_delivery_receipts.hs

@@ -0,0 +1,24 @@
+{-# LANGUAGE QuasiQuotes #-}
+
+module Simplex.Messaging.Agent.Store.SQLite.Migrations.M20230701_delivery_receipts where
+
+import Database.SQLite.Simple (Query)
+import Database.SQLite.Simple.QQ (sql)
+
+m20230701_delivery_receipts :: Query
+m20230701_delivery_receipts =
+  [sql|
+ALTER TABLE snd_messages ADD COLUMN rcpt_internal_id INTEGER;
+ALTER TABLE snd_messages ADD COLUMN rcpt_status TEXT;
+
+CREATE INDEX idx_snd_messages_rcpt_internal_id ON snd_messages(conn_id, rcpt_internal_id);
+|]
+
+down_m20230701_delivery_receipts :: Query
+down_m20230701_delivery_receipts =
+  [sql|
+DROP INDEX idx_snd_messages_rcpt_internal_id;
+
+ALTER TABLE snd_messages DROP COLUMN rcpt_internal_id;
+ALTER TABLE snd_messages DROP COLUMN rcpt_status;
+|]

src/Simplex/Messaging/Agent/Store/SQLite/Migrations/M20230720_delete_expired_messages.hs

@@ -0,0 +1,20 @@
+{-# LANGUAGE QuasiQuotes #-}
+
+module Simplex.Messaging.Agent.Store.SQLite.Migrations.M20230720_delete_expired_messages where
+
+import Database.SQLite.Simple (Query)
+import Database.SQLite.Simple.QQ (sql)
+
+m20230720_delete_expired_messages :: Query
+m20230720_delete_expired_messages =
+  [sql|
+CREATE INDEX idx_messages_internal_snd_id_ts ON messages(internal_snd_id, internal_ts);
+
+DELETE FROM messages WHERE internal_snd_id IS NOT NULL AND internal_ts < datetime('now', '-3 days');
+|]
+
+down_m20230720_delete_expired_messages :: Query
+down_m20230720_delete_expired_messages =
+  [sql|
+DROP INDEX idx_messages_internal_snd_id_ts;
+|]

src/Simplex/Messaging/Agent/Store/SQLite/Migrations/M20230722_indexes.hs

@@ -0,0 +1,20 @@
+{-# LANGUAGE QuasiQuotes #-}
+
+module Simplex.Messaging.Agent.Store.SQLite.Migrations.M20230722_indexes where
+
+import Database.SQLite.Simple (Query)
+import Database.SQLite.Simple.QQ (sql)
+
+m20230722_indexes :: Query
+m20230722_indexes =
+  [sql|
+CREATE INDEX idx_processed_ratchet_key_hashes_created_at ON processed_ratchet_key_hashes(created_at);
+CREATE INDEX idx_encrypted_rcv_message_hashes_created_at ON encrypted_rcv_message_hashes(created_at);
+|]
+
+down_m20230722_indexes :: Query
+down_m20230722_indexes =
+  [sql|
+DROP INDEX idx_encrypted_rcv_message_hashes_created_at;
+DROP INDEX idx_processed_ratchet_key_hashes_created_at;
+|]

src/Simplex/Messaging/Agent/Store/SQLite/Migrations/M20230814_indexes.hs

@@ -0,0 +1,22 @@
+{-# LANGUAGE QuasiQuotes #-}
+
+module Simplex.Messaging.Agent.Store.SQLite.Migrations.M20230814_indexes where
+
+import Database.SQLite.Simple (Query)
+import Database.SQLite.Simple.QQ (sql)
+
+m20230814_indexes :: Query
+m20230814_indexes =
+  [sql|
+DROP INDEX idx_messages_internal_snd_id_ts;
+
+CREATE INDEX idx_messages_internal_ts ON messages(internal_ts);
+|]
+
+down_m20230814_indexes :: Query
+down_m20230814_indexes =
+  [sql|
+DROP INDEX idx_messages_internal_ts;
+
+CREATE INDEX idx_messages_internal_snd_id_ts ON messages(internal_snd_id, internal_ts);
+|]

src/Simplex/Messaging/Agent/Store/SQLite/Migrations/agent_schema.sql

@@ -1,6 +1,7 @@
 CREATE TABLE migrations(
   name TEXT NOT NULL,
   ts TEXT NOT NULL,
+  down TEXT,
   PRIMARY KEY(name)
 );
 CREATE TABLE servers(
@@ -24,7 +25,8 @@ CREATE TABLE connections(
   enable_ntfs INTEGER,
   deleted INTEGER DEFAULT 0 CHECK(deleted NOT NULL),
   user_id INTEGER CHECK(user_id NOT NULL)
-  REFERENCES users ON DELETE CASCADE
+  REFERENCES users ON DELETE CASCADE,
+  ratchet_sync_state TEXT NOT NULL DEFAULT 'ok'
 ) WITHOUT ROWID;
 CREATE TABLE rcv_queues(
   host TEXT NOT NULL,
@@ -49,6 +51,8 @@ CREATE TABLE rcv_queues(
   replace_rcv_queue_id INTEGER NULL,
   delete_errors INTEGER DEFAULT 0 CHECK(delete_errors NOT NULL),
   server_key_hash BLOB,
+  switch_status TEXT,
+  deleted INTEGER NOT NULL DEFAULT 0,
   PRIMARY KEY(host, port, rcv_id),
   FOREIGN KEY(host, port) REFERENCES servers
   ON DELETE RESTRICT ON UPDATE CASCADE,
@@ -70,6 +74,7 @@ CREATE TABLE snd_queues(
   snd_primary INTEGER CHECK(snd_primary NOT NULL),
   replace_snd_queue_id INTEGER NULL,
   server_key_hash BLOB,
+  switch_status TEXT,
   PRIMARY KEY(host, port, snd_id),
   FOREIGN KEY(host, port) REFERENCES servers
   ON DELETE RESTRICT ON UPDATE CASCADE
@@ -112,6 +117,10 @@ CREATE TABLE snd_messages(
   internal_id INTEGER NOT NULL,
   internal_hash BLOB NOT NULL,
   previous_msg_hash BLOB NOT NULL DEFAULT x'',
+  retry_int_slow INTEGER,
+  retry_int_fast INTEGER,
+  rcpt_internal_id INTEGER,
+  rcpt_status TEXT,
   PRIMARY KEY(conn_id, internal_snd_id),
   FOREIGN KEY(conn_id, internal_id) REFERENCES messages
   ON DELETE CASCADE
@@ -148,6 +157,9 @@ CREATE TABLE ratchets(
   -- ratchet is initially empty on the receiving side(the side offering the connection)
   ratchet_state BLOB,
   e2e_version INTEGER NOT NULL DEFAULT 1
+  ,
+  x3dh_pub_key_1 BLOB,
+  x3dh_pub_key_2 BLOB
 ) WITHOUT ROWID;
 CREATE TABLE skipped_messages(
   skipped_message_id INTEGER PRIMARY KEY,
@@ -185,7 +197,6 @@ tkn_dh_secret BLOB, -- DH secret for e2e encryption of notifications
   FOREIGN KEY(ntf_host, ntf_port) REFERENCES ntf_servers
   ON DELETE RESTRICT ON UPDATE CASCADE
 ) WITHOUT ROWID;
-CREATE UNIQUE INDEX idx_rcv_queues_ntf ON rcv_queues(host, port, ntf_id);
 CREATE TABLE ntf_subscriptions(
   conn_id BLOB NOT NULL,
   smp_host TEXT NULL,
@@ -221,8 +232,6 @@ CREATE TABLE commands(
   FOREIGN KEY(host, port) REFERENCES servers
   ON DELETE RESTRICT ON UPDATE CASCADE
 );
-CREATE UNIQUE INDEX idx_rcv_queue_id ON rcv_queues(conn_id, rcv_queue_id);
-CREATE UNIQUE INDEX idx_snd_queue_id ON snd_queues(conn_id, snd_queue_id);
 CREATE TABLE snd_message_deliveries(
   snd_message_delivery_id INTEGER PRIMARY KEY AUTOINCREMENT,
   conn_id BLOB NOT NULL REFERENCES connections ON DELETE CASCADE,
@@ -231,15 +240,142 @@ CREATE TABLE snd_message_deliveries(
   FOREIGN KEY(conn_id, internal_id) REFERENCES messages ON DELETE CASCADE DEFERRABLE INITIALLY DEFERRED
 );
 CREATE TABLE sqlite_sequence(name,seq);
-CREATE INDEX idx_snd_message_deliveries ON snd_message_deliveries(
-  conn_id,
-  snd_queue_id
-);
 CREATE TABLE users(
   user_id INTEGER PRIMARY KEY AUTOINCREMENT
   ,
   deleted INTEGER DEFAULT 0 CHECK(deleted NOT NULL)
 );
+CREATE TABLE xftp_servers(
+  xftp_server_id INTEGER PRIMARY KEY,
+  xftp_host TEXT NOT NULL,
+  xftp_port TEXT NOT NULL,
+  xftp_key_hash BLOB NOT NULL,
+  created_at TEXT NOT NULL DEFAULT(datetime('now')),
+  updated_at TEXT NOT NULL DEFAULT(datetime('now')),
+  UNIQUE(xftp_host, xftp_port, xftp_key_hash)
+);
+CREATE TABLE rcv_files(
+  rcv_file_id INTEGER PRIMARY KEY,
+  rcv_file_entity_id BLOB NOT NULL,
+  user_id INTEGER NOT NULL REFERENCES users ON DELETE CASCADE,
+  size INTEGER NOT NULL,
+  digest BLOB NOT NULL,
+  key BLOB NOT NULL,
+  nonce BLOB NOT NULL,
+  chunk_size INTEGER NOT NULL,
+  prefix_path TEXT NOT NULL,
+  tmp_path TEXT,
+  save_path TEXT NOT NULL,
+  status TEXT NOT NULL,
+  deleted INTEGER NOT NULL DEFAULT 0,
+  error TEXT,
+  created_at TEXT NOT NULL DEFAULT(datetime('now')),
+  updated_at TEXT NOT NULL DEFAULT(datetime('now')),
+  UNIQUE(rcv_file_entity_id)
+);
+CREATE TABLE rcv_file_chunks(
+  rcv_file_chunk_id INTEGER PRIMARY KEY,
+  rcv_file_id INTEGER NOT NULL REFERENCES rcv_files ON DELETE CASCADE,
+  chunk_no INTEGER NOT NULL,
+  chunk_size INTEGER NOT NULL,
+  digest BLOB NOT NULL,
+  tmp_path TEXT,
+  created_at TEXT NOT NULL DEFAULT(datetime('now')),
+  updated_at TEXT NOT NULL DEFAULT(datetime('now'))
+);
+CREATE TABLE rcv_file_chunk_replicas(
+  rcv_file_chunk_replica_id INTEGER PRIMARY KEY,
+  rcv_file_chunk_id INTEGER NOT NULL REFERENCES rcv_file_chunks ON DELETE CASCADE,
+  replica_number INTEGER NOT NULL,
+  xftp_server_id INTEGER NOT NULL REFERENCES xftp_servers ON DELETE CASCADE,
+  replica_id BLOB NOT NULL,
+  replica_key BLOB NOT NULL,
+  received INTEGER NOT NULL DEFAULT 0,
+  delay INTEGER,
+  retries INTEGER NOT NULL DEFAULT 0,
+  created_at TEXT NOT NULL DEFAULT(datetime('now')),
+  updated_at TEXT NOT NULL DEFAULT(datetime('now'))
+);
+CREATE TABLE snd_files(
+  snd_file_id INTEGER PRIMARY KEY,
+  snd_file_entity_id BLOB NOT NULL,
+  user_id INTEGER NOT NULL REFERENCES users ON DELETE CASCADE,
+  num_recipients INTEGER NOT NULL,
+  digest BLOB,
+  key BLOB NOT NUll,
+  nonce BLOB NOT NUll,
+  path TEXT NOT NULL,
+  prefix_path TEXT,
+  status TEXT NOT NULL,
+  deleted INTEGER NOT NULL DEFAULT 0,
+  error TEXT,
+  created_at TEXT NOT NULL DEFAULT(datetime('now')),
+  updated_at TEXT NOT NULL DEFAULT(datetime('now'))
+);
+CREATE TABLE snd_file_chunks(
+  snd_file_chunk_id INTEGER PRIMARY KEY,
+  snd_file_id INTEGER NOT NULL REFERENCES snd_files ON DELETE CASCADE,
+  chunk_no INTEGER NOT NULL,
+  chunk_offset INTEGER NOT NULL,
+  chunk_size INTEGER NOT NULL,
+  digest BLOB NOT NULL,
+  created_at TEXT NOT NULL DEFAULT(datetime('now')),
+  updated_at TEXT NOT NULL DEFAULT(datetime('now'))
+);
+CREATE TABLE snd_file_chunk_replicas(
+  snd_file_chunk_replica_id INTEGER PRIMARY KEY,
+  snd_file_chunk_id INTEGER NOT NULL REFERENCES snd_file_chunks ON DELETE CASCADE,
+  replica_number INTEGER NOT NULL,
+  xftp_server_id INTEGER NOT NULL REFERENCES xftp_servers ON DELETE CASCADE,
+  replica_id BLOB NOT NULL,
+  replica_key BLOB NOT NULL,
+  replica_status TEXT NOT NULL,
+  delay INTEGER,
+  retries INTEGER NOT NULL DEFAULT 0,
+  created_at TEXT NOT NULL DEFAULT(datetime('now')),
+  updated_at TEXT NOT NULL DEFAULT(datetime('now'))
+);
+CREATE TABLE snd_file_chunk_replica_recipients(
+  snd_file_chunk_replica_recipient_id INTEGER PRIMARY KEY,
+  snd_file_chunk_replica_id INTEGER NOT NULL REFERENCES snd_file_chunk_replicas ON DELETE CASCADE,
+  rcv_replica_id BLOB NOT NULL,
+  rcv_replica_key BLOB NOT NULL,
+  created_at TEXT NOT NULL DEFAULT(datetime('now')),
+  updated_at TEXT NOT NULL DEFAULT(datetime('now'))
+);
+CREATE TABLE deleted_snd_chunk_replicas(
+  deleted_snd_chunk_replica_id INTEGER PRIMARY KEY,
+  user_id INTEGER NOT NULL REFERENCES users ON DELETE CASCADE,
+  xftp_server_id INTEGER NOT NULL REFERENCES xftp_servers ON DELETE CASCADE,
+  replica_id BLOB NOT NULL,
+  replica_key BLOB NOT NULL,
+  chunk_digest BLOB NOT NULL,
+  delay INTEGER,
+  retries INTEGER NOT NULL DEFAULT 0,
+  created_at TEXT NOT NULL DEFAULT(datetime('now')),
+  updated_at TEXT NOT NULL DEFAULT(datetime('now'))
+);
+CREATE TABLE encrypted_rcv_message_hashes(
+  encrypted_rcv_message_hash_id INTEGER PRIMARY KEY,
+  conn_id BLOB NOT NULL REFERENCES connections ON DELETE CASCADE,
+  hash BLOB NOT NULL,
+  created_at TEXT NOT NULL DEFAULT(datetime('now')),
+  updated_at TEXT NOT NULL DEFAULT(datetime('now'))
+);
+CREATE TABLE processed_ratchet_key_hashes(
+  processed_ratchet_key_hash_id INTEGER PRIMARY KEY,
+  conn_id BLOB NOT NULL REFERENCES connections ON DELETE CASCADE,
+  hash BLOB NOT NULL,
+  created_at TEXT NOT NULL DEFAULT(datetime('now')),
+  updated_at TEXT NOT NULL DEFAULT(datetime('now'))
+);
+CREATE UNIQUE INDEX idx_rcv_queues_ntf ON rcv_queues(host, port, ntf_id);
+CREATE UNIQUE INDEX idx_rcv_queue_id ON rcv_queues(conn_id, rcv_queue_id);
+CREATE UNIQUE INDEX idx_snd_queue_id ON snd_queues(conn_id, snd_queue_id);
+CREATE INDEX idx_snd_message_deliveries ON snd_message_deliveries(
+  conn_id,
+  snd_queue_id
+);
 CREATE INDEX idx_connections_user ON connections(user_id);
 CREATE INDEX idx_commands_conn_id ON commands(conn_id);
 CREATE INDEX idx_commands_host_port ON commands(host, port);
@@ -283,3 +419,58 @@ CREATE INDEX idx_snd_messages_conn_id_internal_id ON snd_messages(
   internal_id
 );
 CREATE INDEX idx_snd_queues_host_port ON snd_queues(host, port);
+CREATE INDEX idx_rcv_files_user_id ON rcv_files(user_id);
+CREATE INDEX idx_rcv_file_chunks_rcv_file_id ON rcv_file_chunks(rcv_file_id);
+CREATE INDEX idx_rcv_file_chunk_replicas_rcv_file_chunk_id ON rcv_file_chunk_replicas(
+  rcv_file_chunk_id
+);
+CREATE INDEX idx_rcv_file_chunk_replicas_xftp_server_id ON rcv_file_chunk_replicas(
+  xftp_server_id
+);
+CREATE INDEX idx_snd_files_user_id ON snd_files(user_id);
+CREATE INDEX idx_snd_file_chunks_snd_file_id ON snd_file_chunks(snd_file_id);
+CREATE INDEX idx_snd_file_chunk_replicas_snd_file_chunk_id ON snd_file_chunk_replicas(
+  snd_file_chunk_id
+);
+CREATE INDEX idx_snd_file_chunk_replicas_xftp_server_id ON snd_file_chunk_replicas(
+  xftp_server_id
+);
+CREATE INDEX idx_snd_file_chunk_replica_recipients_snd_file_chunk_replica_id ON snd_file_chunk_replica_recipients(
+  snd_file_chunk_replica_id
+);
+CREATE INDEX idx_deleted_snd_chunk_replicas_user_id ON deleted_snd_chunk_replicas(
+  user_id
+);
+CREATE INDEX idx_deleted_snd_chunk_replicas_xftp_server_id ON deleted_snd_chunk_replicas(
+  xftp_server_id
+);
+CREATE INDEX idx_rcv_file_chunk_replicas_pending ON rcv_file_chunk_replicas(
+  received,
+  replica_number
+);
+CREATE INDEX idx_snd_file_chunk_replicas_pending ON snd_file_chunk_replicas(
+  replica_status,
+  replica_number
+);
+CREATE INDEX idx_deleted_snd_chunk_replicas_pending ON deleted_snd_chunk_replicas(
+  created_at
+);
+CREATE INDEX idx_encrypted_rcv_message_hashes_hash ON encrypted_rcv_message_hashes(
+  conn_id,
+  hash
+);
+CREATE INDEX idx_processed_ratchet_key_hashes_hash ON processed_ratchet_key_hashes(
+  conn_id,
+  hash
+);
+CREATE INDEX idx_snd_messages_rcpt_internal_id ON snd_messages(
+  conn_id,
+  rcpt_internal_id
+);
+CREATE INDEX idx_processed_ratchet_key_hashes_created_at ON processed_ratchet_key_hashes(
+  created_at
+);
+CREATE INDEX idx_encrypted_rcv_message_hashes_created_at ON encrypted_rcv_message_hashes(
+  created_at
+);
+CREATE INDEX idx_messages_internal_ts ON messages(internal_ts);

src/Simplex/Messaging/Agent/TAsyncs.hs

@@ -1,6 +1,5 @@
 module Simplex.Messaging.Agent.TAsyncs where
 
-import Control.Concurrent.STM (stateTVar)
 import Control.Monad.IO.Unlift (MonadUnliftIO)
 import Simplex.Messaging.TMap (TMap)
 import qualified Simplex.Messaging.TMap as TM

src/Simplex/Messaging/Agent/TRcvQueues.hs

@@ -16,8 +16,8 @@ import Control.Concurrent.STM
 import qualified Data.Map.Strict as M
 import Data.Set (Set)
 import qualified Data.Set as S
-import Simplex.Messaging.Agent.Protocol (ConnId)
-import Simplex.Messaging.Agent.Store (RcvQueue (..), UserId)
+import Simplex.Messaging.Agent.Protocol (ConnId, UserId)
+import Simplex.Messaging.Agent.Store (RcvQueue (..))
 import Simplex.Messaging.Protocol (RecipientId, SMPServer)
 import Simplex.Messaging.TMap (TMap)
 import qualified Simplex.Messaging.TMap as TM

src/Simplex/Messaging/Client.hs

@@ -10,6 +10,7 @@
 {-# LANGUAGE OverloadedLists #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE ScopedTypeVariables #-}
+{-# LANGUAGE TupleSections #-}
 {-# LANGUAGE TypeApplications #-}
 
 -- |
@@ -31,7 +32,7 @@ module Simplex.Messaging.Client
     SMPClient,
     getProtocolClient,
     closeProtocolClient,
-    clientServer,
+    protocolClientServer,
     transportHost',
     transportSession',
 
@@ -39,8 +40,10 @@ module Simplex.Messaging.Client
     createSMPQueue,
     subscribeSMPQueue,
     subscribeSMPQueues,
+    streamSubscribeSMPQueues,
     getSMPMessage,
     subscribeSMPQueueNotifications,
+    subscribeSMPQueuesNtfs,
     secureSMPQueue,
     enableSMPQueueNotifications,
     disableSMPQueueNotifications,
@@ -67,10 +70,16 @@ module Simplex.Messaging.Client
     temporaryClientError,
     ServerTransmission,
     ClientCommand,
+
+    -- * For testing
+    ClientBatch (..),
+    PCTransmission,
+    batchClientTransmissions,
+    mkTransmission,
+    clientStub,
   )
 where
 
-import Control.Concurrent (threadDelay)
 import Control.Concurrent.Async
 import Control.Concurrent.STM
 import Control.Exception
@@ -81,11 +90,10 @@ import Data.Aeson (FromJSON (..), ToJSON (..))
 import qualified Data.Aeson as J
 import Data.ByteString.Char8 (ByteString)
 import qualified Data.ByteString.Char8 as B
-import Data.Either (rights)
 import Data.Functor (($>))
 import Data.Int (Int64)
 import Data.List (find)
-import Data.List.NonEmpty (NonEmpty)
+import Data.List.NonEmpty (NonEmpty (..))
 import qualified Data.List.NonEmpty as L
 import Data.Maybe (fromMaybe)
 import Data.Time.Clock (UTCTime, getCurrentTime)
@@ -93,6 +101,7 @@ import GHC.Generics (Generic)
 import Network.Socket (ServiceName)
 import Numeric.Natural
 import qualified Simplex.Messaging.Crypto as C
+import Simplex.Messaging.Encoding
 import Simplex.Messaging.Encoding.String
 import Simplex.Messaging.Parsers (dropPrefix, enumJSON)
 import Simplex.Messaging.Protocol as SMP
@@ -102,7 +111,7 @@ import Simplex.Messaging.Transport
 import Simplex.Messaging.Transport.Client (SocksProxy, TransportClientConfig (..), TransportHost (..), runTransportClient)
 import Simplex.Messaging.Transport.KeepAlive
 import Simplex.Messaging.Transport.WebSockets (WS)
-import Simplex.Messaging.Util (bshow, raceAny_)
+import Simplex.Messaging.Util (bshow, raceAny_, threadDelay')
 import Simplex.Messaging.Version
 import System.Timeout (timeout)
 
@@ -114,6 +123,9 @@ data ProtocolClient err msg = ProtocolClient
     sessionId :: SessionId,
     sessionTs :: UTCTime,
     thVersion :: Version,
+    timeoutPerBlock :: Int,
+    blockSize :: Int,
+    batch :: Bool,
     client_ :: PClient err msg
   }
 
@@ -122,21 +134,54 @@ data PClient err msg = PClient
     transportSession :: TransportSession msg,
     transportHost :: TransportHost,
     tcpTimeout :: Int,
+    batchDelay :: Maybe Int,
     pingErrorCount :: TVar Int,
     clientCorrId :: TVar Natural,
     sentCommands :: TMap CorrId (Request err msg),
-    sndQ :: TBQueue (NonEmpty SentRawTransmission),
+    sndQ :: TBQueue ByteString,
     rcvQ :: TBQueue (NonEmpty (SignedTransmission err msg)),
     msgQ :: Maybe (TBQueue (ServerTransmission msg))
   }
 
+clientStub :: ByteString -> STM (ProtocolClient err msg)
+clientStub sessionId = do
+  connected <- newTVar False
+  clientCorrId <- newTVar 0
+  sentCommands <- TM.empty
+  sndQ <- newTBQueue 100
+  rcvQ <- newTBQueue 100
+  return
+    ProtocolClient
+      { action = Nothing,
+        sessionId,
+        sessionTs = undefined,
+        thVersion = 5,
+        timeoutPerBlock = undefined,
+        blockSize = smpBlockSize,
+        batch = undefined,
+        client_ =
+          PClient
+            { connected,
+              transportSession = undefined,
+              transportHost = undefined,
+              tcpTimeout = undefined,
+              batchDelay = Nothing,
+              pingErrorCount = undefined,
+              clientCorrId,
+              sentCommands,
+              sndQ,
+              rcvQ,
+              msgQ = Nothing
+            }
+      }
+
 type SMPClient = ProtocolClient ErrorType SMP.BrokerMsg
 
 -- | Type for client command data
-type ClientCommand msg = (Maybe C.APrivateSignKey, QueueId, ProtoCommand msg)
+type ClientCommand msg = (Maybe C.APrivateSignKey, EntityId, ProtoCommand msg)
 
 -- | Type synonym for transmission from some SPM server queue.
-type ServerTransmission msg = (TransportSession msg, Version, SessionId, QueueId, msg)
+type ServerTransmission msg = (TransportSession msg, Version, SessionId, EntityId, msg)
 
 data HostMode
   = -- | prefer (or require) onion hosts when connecting via SOCKS proxy
@@ -168,10 +213,12 @@ data NetworkConfig = NetworkConfig
     tcpConnectTimeout :: Int,
     -- | timeout of protocol commands (microseconds)
     tcpTimeout :: Int,
+    -- | additional timeout per kilobyte (1024 bytes) to be sent
+    tcpTimeoutPerKb :: Int,
     -- | TCP keep-alive options, Nothing to skip enabling keep-alive
     tcpKeepAlive :: Maybe KeepAliveOpts,
     -- | period for SMP ping commands (microseconds, 0 to disable)
-    smpPingInterval :: Int,
+    smpPingInterval :: Int64,
     -- | the count of PING errors after which SMP client terminates (and will be reconnected), 0 to disable
     smpPingCount :: Int,
     logTLSErrors :: Bool
@@ -199,8 +246,9 @@ defaultNetworkConfig =
       hostMode = HMOnionViaSocks,
       requiredHostMode = False,
       sessionMode = TSMUser,
-      tcpConnectTimeout = 7_500_000,
-      tcpTimeout = 5_000_000,
+      tcpConnectTimeout = 15_000_000,
+      tcpTimeout = 10_000_000,
+      tcpTimeoutPerKb = 20_000, -- 20ms, should be less than 130ms to avoid Int overflow on 32 bit systems
       tcpKeepAlive = Just defaultKeepAliveOpts,
       smpPingInterval = 600_000_000, -- 10min
       smpPingCount = 3,
@@ -219,8 +267,10 @@ data ProtocolClientConfig = ProtocolClientConfig
     defaultTransport :: (ServiceName, ATransport),
     -- | network configuration
     networkConfig :: NetworkConfig,
-    -- | SMP client-server protocol version range
-    smpServerVRange :: VersionRange
+    -- | client-server protocol version range
+    serverVRange :: VersionRange,
+    -- | delay between sending batches of commands (microseconds)
+    batchDelay :: Maybe Int
   }
 
 -- | Default protocol client configuration.
@@ -230,15 +280,19 @@ defaultClientConfig =
     { qSize = 64,
       defaultTransport = ("443", transport @TLS),
       networkConfig = defaultNetworkConfig,
-      smpServerVRange = supportedSMPServerVRange
+      serverVRange = supportedSMPServerVRange,
+      batchDelay = Nothing
     }
 
 data Request err msg = Request
-  { queueId :: QueueId,
-    responseVar :: TMVar (Response err msg)
+  { entityId :: EntityId,
+    responseVar :: TMVar (Either (ProtocolClientError err) msg)
   }
 
-type Response err msg = Either (ProtocolClientError err) msg
+data Response err msg = Response
+  { entityId :: EntityId,
+    response :: Either (ProtocolClientError err) msg
+  }
 
 chooseTransportHost :: NetworkConfig -> NonEmpty TransportHost -> Either (ProtocolClientError err) TransportHost
 chooseTransportHost NetworkConfig {socksProxy, hostMode, requiredHostMode} hosts =
@@ -254,8 +308,8 @@ chooseTransportHost NetworkConfig {socksProxy, hostMode, requiredHostMode} hosts
     onionHost = find isOnionHost hosts
     publicHost = find (not . isOnionHost) hosts
 
-clientServer :: ProtocolTypeI (ProtoType msg) => ProtocolClient err msg -> String
-clientServer = B.unpack . strEncode . snd3 . transportSession . client_
+protocolClientServer :: ProtocolTypeI (ProtoType msg) => ProtocolClient err msg -> String
+protocolClientServer = B.unpack . strEncode . snd3 . transportSession . client_
   where
     snd3 (_, s, _) = s
 
@@ -276,14 +330,14 @@ type TransportSession msg = (UserId, ProtoServer msg, Maybe EntityId)
 -- A single queue can be used for multiple 'SMPClient' instances,
 -- as 'SMPServerTransmission' includes server information.
 getProtocolClient :: forall err msg. Protocol err msg => TransportSession msg -> ProtocolClientConfig -> Maybe (TBQueue (ServerTransmission msg)) -> (ProtocolClient err msg -> IO ()) -> IO (Either (ProtocolClientError err) (ProtocolClient err msg))
-getProtocolClient transportSession@(_, srv, _) cfg@ProtocolClientConfig {qSize, networkConfig, smpServerVRange} msgQ disconnected = do
+getProtocolClient transportSession@(_, srv, _) cfg@ProtocolClientConfig {qSize, networkConfig, serverVRange, batchDelay} msgQ disconnected = do
   case chooseTransportHost networkConfig (host srv) of
     Right useHost ->
       (atomically (mkProtocolClient useHost) >>= runClient useTransport useHost)
         `catch` \(e :: IOException) -> pure . Left $ PCEIOError e
     Left e -> pure $ Left e
   where
-    NetworkConfig {tcpConnectTimeout, tcpTimeout, smpPingInterval} = networkConfig
+    NetworkConfig {tcpConnectTimeout, tcpTimeout, tcpTimeoutPerKb, smpPingInterval} = networkConfig
     mkProtocolClient :: TransportHost -> STM (PClient err msg)
     mkProtocolClient transportHost = do
       connected <- newTVar False
@@ -298,6 +352,7 @@ getProtocolClient transportSession@(_, srv, _) cfg@ProtocolClientConfig {qSize,
             transportSession,
             transportHost,
             tcpTimeout,
+            batchDelay,
             pingErrorCount,
             clientCorrId,
             sentCommands,
@@ -329,11 +384,12 @@ getProtocolClient transportSession@(_, srv, _) cfg@ProtocolClientConfig {qSize,
 
     client :: forall c. Transport c => TProxy c -> PClient err msg -> TMVar (Either (ProtocolClientError err) (ProtocolClient err msg)) -> c -> IO ()
     client _ c cVar h =
-      runExceptT (protocolClientHandshake @err @msg h (keyHash srv) smpServerVRange) >>= \case
+      runExceptT (protocolClientHandshake @err @msg h (keyHash srv) serverVRange) >>= \case
         Left e -> atomically . putTMVar cVar . Left $ PCETransportError e
-        Right th@THandle {sessionId, thVersion} -> do
+        Right th@THandle {sessionId, thVersion, blockSize, batch} -> do
           sessionTs <- getCurrentTime
-          let c' = ProtocolClient {action = Nothing, client_ = c, sessionId, thVersion, sessionTs}
+          let timeoutPerBlock = (blockSize * tcpTimeoutPerKb) `div` 1024
+              c' = ProtocolClient {action = Nothing, client_ = c, sessionId, thVersion, sessionTs, timeoutPerBlock, blockSize, batch}
           atomically $ do
             writeTVar (connected c) True
             putTMVar cVar $ Right c'
@@ -341,14 +397,14 @@ getProtocolClient transportSession@(_, srv, _) cfg@ProtocolClientConfig {qSize,
             `finally` disconnected c'
 
     send :: Transport c => ProtocolClient err msg -> THandle c -> IO ()
-    send ProtocolClient {client_ = PClient {sndQ}} h = forever $ atomically (readTBQueue sndQ) >>= tPut h
+    send ProtocolClient {client_ = PClient {sndQ}} h = forever $ atomically (readTBQueue sndQ) >>= tPutLog h
 
     receive :: Transport c => ProtocolClient err msg -> THandle c -> IO ()
     receive ProtocolClient {client_ = PClient {rcvQ}} h = forever $ tGet h >>= atomically . writeTBQueue rcvQ
 
     ping :: ProtocolClient err msg -> IO ()
     ping c@ProtocolClient {client_ = PClient {pingErrorCount}} = do
-      threadDelay smpPingInterval
+      threadDelay' smpPingInterval
       runExceptT (sendProtocolCommand c Nothing "" $ protocolPing @err @msg) >>= \case
         Left PCEResponseTimeout -> do
           cnt <- atomically $ stateTVar pingErrorCount $ \cnt -> (cnt + 1, cnt + 1)
@@ -361,26 +417,27 @@ getProtocolClient transportSession@(_, srv, _) cfg@ProtocolClientConfig {qSize,
     process c = forever $ atomically (readTBQueue $ rcvQ $ client_ c) >>= mapM_ (processMsg c)
 
     processMsg :: ProtocolClient err msg -> SignedTransmission err msg -> IO ()
-    processMsg c@ProtocolClient {client_ = PClient {sentCommands}} (_, _, (corrId, qId, respOrErr)) =
+    processMsg c@ProtocolClient {client_ = PClient {sentCommands}} (_, _, (corrId, entId, respOrErr)) =
       if B.null $ bs corrId
         then sendMsg respOrErr
         else do
           atomically (TM.lookup corrId sentCommands) >>= \case
             Nothing -> sendMsg respOrErr
-            Just Request {queueId, responseVar} -> atomically $ do
+            Just Request {entityId, responseVar} -> atomically $ do
               TM.delete corrId sentCommands
-              putTMVar responseVar $
-                if queueId == qId
-                  then case respOrErr of
-                    Left e -> Left $ PCEResponseError e
-                    Right r -> case protocolError r of
-                      Just e -> Left $ PCEProtocolError e
-                      _ -> Right r
-                  else Left . PCEUnexpectedResponse $ bshow respOrErr
+              putTMVar responseVar $ response entityId
       where
+        response entityId
+          | entityId == entId =
+            case respOrErr of
+              Left e -> Left $ PCEResponseError e
+              Right r -> case protocolError r of
+                Just e -> Left $ PCEProtocolError e
+                _ -> Right r
+          | otherwise = Left . PCEUnexpectedResponse $ bshow respOrErr
         sendMsg :: Either err msg -> IO ()
         sendMsg = \case
-          Right msg -> atomically $ mapM_ (`writeTBQueue` serverTransmission c qId msg) msgQ
+          Right msg -> atomically $ mapM_ (`writeTBQueue` serverTransmission c entId msg) msgQ
           Left e -> putStrLn $ "SMP client error: " <> show e
 
 proxyUsername :: TransportSession msg -> ByteString
@@ -456,14 +513,22 @@ subscribeSMPQueue c rpKey rId =
 
 -- | Subscribe to multiple SMP queues batching commands if supported.
 subscribeSMPQueues :: SMPClient -> NonEmpty (RcvPrivateSignKey, RecipientId) -> IO (NonEmpty (Either SMPClientError ()))
-subscribeSMPQueues c qs = sendProtocolCommands c cs >>= mapM response . L.zip qs
+subscribeSMPQueues c qs = sendProtocolCommands c cs >>= mapM (processSUBResponse c)
   where
     cs = L.map (\(rpKey, rId) -> (Just rpKey, rId, Cmd SRecipient SUB)) qs
-    response ((_, rId), r) = case r of
-      Right OK -> pure $ Right ()
-      Right cmd@MSG {} -> writeSMPMessage c rId cmd $> Right ()
-      Right r' -> pure . Left . PCEUnexpectedResponse $ bshow r'
-      Left e -> pure $ Left e
+
+streamSubscribeSMPQueues :: SMPClient -> NonEmpty (RcvPrivateSignKey, RecipientId) -> ([(RecipientId, Either SMPClientError ())] -> IO ()) -> IO ()
+streamSubscribeSMPQueues c qs cb = streamProtocolCommands c cs $ mapM process >=> cb
+  where
+    cs = L.map (\(rpKey, rId) -> (Just rpKey, rId, Cmd SRecipient SUB)) qs
+    process r@(Response rId _) = (rId,) <$> processSUBResponse c r
+
+processSUBResponse :: SMPClient -> Response ErrorType BrokerMsg -> IO (Either SMPClientError ())
+processSUBResponse c (Response rId r) = case r of
+  Right OK -> pure $ Right ()
+  Right cmd@MSG {} -> writeSMPMessage c rId cmd $> Right ()
+  Right r' -> pure . Left . PCEUnexpectedResponse $ bshow r'
+  Left e -> pure $ Left e
 
 writeSMPMessage :: SMPClient -> RecipientId -> BrokerMsg -> IO ()
 writeSMPMessage c rId msg = atomically $ mapM_ (`writeTBQueue` serverTransmission c rId msg) (msgQ $ client_ c)
@@ -488,6 +553,10 @@ getSMPMessage c rpKey rId =
 subscribeSMPQueueNotifications :: SMPClient -> NtfPrivateSignKey -> NotifierId -> ExceptT SMPClientError IO ()
 subscribeSMPQueueNotifications = okSMPCommand NSUB
 
+-- | Subscribe to multiple SMP queues notifications batching commands if supported.
+subscribeSMPQueuesNtfs :: SMPClient -> NonEmpty (NtfPrivateSignKey, NotifierId) -> IO (NonEmpty (Either SMPClientError ()))
+subscribeSMPQueuesNtfs = okSMPCommands NSUB
+
 -- | Secure the SMP queue by adding a sender public key.
 --
 -- https://github.com/simplex-chat/simplexmq/blob/master/protocol/simplex-messaging.md#secure-queue-command
@@ -505,12 +574,12 @@ enableSMPQueueNotifications c rpKey rId notifierKey rcvNtfPublicDhKey =
 
 -- | Enable notifications for the multiple queues for push notifications server.
 enableSMPQueuesNtfs :: SMPClient -> NonEmpty (RcvPrivateSignKey, RecipientId, NtfPublicVerifyKey, RcvNtfPublicDhKey) -> IO (NonEmpty (Either SMPClientError (NotifierId, RcvNtfPublicDhKey)))
-enableSMPQueuesNtfs c qs = L.map response <$> sendProtocolCommands c cs
+enableSMPQueuesNtfs c qs = L.map process <$> sendProtocolCommands c cs
   where
     cs = L.map (\(rpKey, rId, notifierKey, rcvNtfPublicDhKey) -> (Just rpKey, rId, Cmd SRecipient $ NKEY notifierKey rcvNtfPublicDhKey)) qs
-    response = \case
+    process (Response _ r) = case r of
       Right (NID nId rcvNtfSrvPublicDhKey) -> Right (nId, rcvNtfSrvPublicDhKey)
-      Right r -> Left . PCEUnexpectedResponse $ bshow r
+      Right r' -> Left . PCEUnexpectedResponse $ bshow r'
       Left e -> Left e
 
 -- | Disable notifications for the queue for push notifications server.
@@ -566,49 +635,122 @@ okSMPCommand cmd c pKey qId =
     r -> throwE . PCEUnexpectedResponse $ bshow r
 
 okSMPCommands :: PartyI p => Command p -> SMPClient -> NonEmpty (C.APrivateSignKey, QueueId) -> IO (NonEmpty (Either SMPClientError ()))
-okSMPCommands cmd c qs = L.map response <$> sendProtocolCommands c cs
+okSMPCommands cmd c qs = L.map process <$> sendProtocolCommands c cs
   where
     aCmd = Cmd sParty cmd
     cs = L.map (\(pKey, qId) -> (Just pKey, qId, aCmd)) qs
-    response = \case
+    process (Response _ r) = case r of
       Right OK -> Right ()
-      Right r -> Left . PCEUnexpectedResponse $ bshow r
+      Right r' -> Left . PCEUnexpectedResponse $ bshow r'
       Left e -> Left e
 
 -- | Send SMP command
 sendSMPCommand :: PartyI p => SMPClient -> Maybe C.APrivateSignKey -> QueueId -> Command p -> ExceptT SMPClientError IO BrokerMsg
 sendSMPCommand c pKey qId cmd = sendProtocolCommand c pKey qId (Cmd sParty cmd)
 
+type PCTransmission err msg = (SentRawTransmission, Request err msg)
+
 -- | Send multiple commands with batching and collect responses
-sendProtocolCommands :: forall err msg. ProtocolEncoding err (ProtoCommand msg) => ProtocolClient err msg -> NonEmpty (ClientCommand msg) -> IO (NonEmpty (Either (ProtocolClientError err) msg))
-sendProtocolCommands c@ProtocolClient {client_ = PClient {sndQ}} cs = do
-  ts <- mapM (runExceptT . mkTransmission c) cs
-  mapM_ (atomically . writeTBQueue sndQ . L.map fst) . L.nonEmpty . rights $ L.toList ts
-  forConcurrently ts $ \case
-    Right (_, r) -> withTimeout c $ atomically $ takeTMVar r
-    Left e -> pure $ Left e
+sendProtocolCommands :: forall err msg. ProtocolEncoding err (ProtoCommand msg) => ProtocolClient err msg -> NonEmpty (ClientCommand msg) -> IO (NonEmpty (Response err msg))
+sendProtocolCommands c@ProtocolClient {batch, blockSize} cs = do
+  bs <- batchClientTransmissions batch blockSize <$> mapM (mkTransmission c) cs
+  validate . concat =<< mapM (sendBatch c) bs
+  where
+    validate :: [Response err msg] -> IO (NonEmpty (Response err msg))
+    validate rs
+      | diff == 0 = pure $ L.fromList rs
+      | diff > 0 = do
+        putStrLn "send error: fewer responses than expected"
+        pure $ L.fromList $ rs <> replicate diff (Response "" $ Left $ PCETransportError TEBadBlock)
+      | otherwise = do
+        putStrLn "send error: more responses than expected"
+        pure $ L.fromList $ take (L.length cs) rs
+        where
+          diff = L.length cs - length rs
+
+streamProtocolCommands :: forall err msg. ProtocolEncoding err (ProtoCommand msg) => ProtocolClient err msg -> NonEmpty (ClientCommand msg) -> ([Response err msg] -> IO ()) -> IO ()
+streamProtocolCommands c@ProtocolClient {batch, blockSize} cs cb = do
+  bs <- batchClientTransmissions batch blockSize <$> mapM (mkTransmission c) cs
+  mapM_ (cb <=< sendBatch c) bs
+
+sendBatch :: ProtocolClient err msg -> ClientBatch err msg -> IO [Response err msg]
+sendBatch c@ProtocolClient {client_ = PClient {sndQ}} b = do
+  case b of
+    CBLargeTransmission Request {entityId} -> do
+      putStrLn "send error: large message"
+      pure [Response entityId $ Left $ PCETransportError TELargeMsg]
+    CBTransmissions s n rs -> do
+      when (n > 0) $ atomically $ writeTBQueue sndQ $ tEncodeBatch n s
+      mapConcurrently (getResponse c) rs
+    CBTransmission s r -> do
+      atomically $ writeTBQueue sndQ s
+      (: []) <$> getResponse c r
+
+data ClientBatch err msg
+  -- ByteString in CBTransmissions does not include count byte, it is added by tEncodeBatch
+  = CBTransmissions ByteString Int [Request err msg]
+  | CBTransmission ByteString (Request err msg)
+  | CBLargeTransmission (Request err msg)
+
+-- | encodes and batches transmissions into blocks
+batchClientTransmissions :: forall err msg. Bool -> Int -> NonEmpty (PCTransmission err msg) -> [ClientBatch err msg]
+batchClientTransmissions batch blkSize
+  | batch = reverse . mkBatch []
+  | otherwise = map mkBatch1 . L.toList
+  where
+    mkBatch :: [ClientBatch err msg] -> NonEmpty (PCTransmission err msg) -> [ClientBatch err msg]
+    mkBatch bs ts =
+      let (b, ts_) = encodeBatch "" 0 [] ts
+          bs' = b : bs
+       in maybe bs' (mkBatch bs') ts_
+    mkBatch1 :: PCTransmission err msg -> ClientBatch err msg
+    mkBatch1 (t, r)
+      | B.length s <= blkSize - 2 = CBTransmission s r
+      | otherwise = CBLargeTransmission r
+      where
+        s = tEncode t
+    encodeBatch :: ByteString -> Int -> [Request err msg] -> NonEmpty (PCTransmission err msg) -> (ClientBatch err msg, Maybe (NonEmpty (PCTransmission err msg)))
+    encodeBatch s n rs ts@((t, r) :| ts_)
+      | B.length s' <= blkSize - 3 && n < 255 =
+        case L.nonEmpty ts_ of
+          Just ts' -> encodeBatch s' n' rs' ts'
+          Nothing -> (CBTransmissions s' n' (reverse rs'), Nothing)
+      | n == 0 = (CBLargeTransmission r, L.nonEmpty ts_)
+      | otherwise = (CBTransmissions s n (reverse rs), Just ts)
+      where
+        s' = s <> smpEncode (Large $ tEncode t)
+        n' = n + 1
+        rs' = r : rs
 
 -- | Send Protocol command
-sendProtocolCommand :: forall err msg. ProtocolEncoding err (ProtoCommand msg) => ProtocolClient err msg -> Maybe C.APrivateSignKey -> QueueId -> ProtoCommand msg -> ExceptT (ProtocolClientError err) IO msg
-sendProtocolCommand c@ProtocolClient {client_ = PClient {sndQ}} pKey qId cmd = do
-  (t, r) <- mkTransmission c (pKey, qId, cmd)
-  ExceptT $ sendRecv t r
+sendProtocolCommand :: forall err msg. ProtocolEncoding err (ProtoCommand msg) => ProtocolClient err msg -> Maybe C.APrivateSignKey -> EntityId -> ProtoCommand msg -> ExceptT (ProtocolClientError err) IO msg
+sendProtocolCommand c@ProtocolClient {client_ = PClient {sndQ}, batch, blockSize} pKey entId cmd =
+  ExceptT $ uncurry sendRecv =<< mkTransmission c (pKey, entId, cmd)
   where
     -- two separate "atomically" needed to avoid blocking
-    sendRecv :: SentRawTransmission -> TMVar (Response err msg) -> IO (Response err msg)
-    sendRecv t r = atomically (writeTBQueue sndQ [t]) >> withTimeout c (atomically $ takeTMVar r)
+    sendRecv :: SentRawTransmission -> Request err msg -> IO (Either (ProtocolClientError err) msg)
+    sendRecv t r
+      | B.length s > blockSize - 2 = pure $ Left $ PCETransportError TELargeMsg
+      | otherwise = atomically (writeTBQueue sndQ s) >> response <$> getResponse c r
+      where
+        s
+          | batch = tEncodeBatch 1 . smpEncode . Large $ tEncode t
+          | otherwise = tEncode t
 
-withTimeout :: ProtocolClient err msg -> IO (Either (ProtocolClientError err) msg) -> IO (Either (ProtocolClientError err) msg)
-withTimeout ProtocolClient {client_ = PClient {tcpTimeout, pingErrorCount}} a =
-  timeout tcpTimeout a >>= \case
-    Just r -> atomically (writeTVar pingErrorCount 0) >> pure r
-    _ -> pure $ Left PCEResponseTimeout
+-- TODO switch to timeout or TimeManager that supports Int64
+getResponse :: ProtocolClient err msg -> Request err msg -> IO (Response err msg)
+getResponse ProtocolClient {client_ = PClient {tcpTimeout, pingErrorCount}} Request {entityId, responseVar} = do
+  response <-
+    timeout tcpTimeout (atomically (takeTMVar responseVar)) >>= \case
+      Just r -> atomically (writeTVar pingErrorCount 0) $> r
+      Nothing -> pure $ Left PCEResponseTimeout
+  pure Response {entityId, response}
 
-mkTransmission :: forall err msg. ProtocolEncoding err (ProtoCommand msg) => ProtocolClient err msg -> ClientCommand msg -> ExceptT (ProtocolClientError err) IO (SentRawTransmission, TMVar (Response err msg))
-mkTransmission ProtocolClient {sessionId, thVersion, client_ = PClient {clientCorrId, sentCommands}} (pKey, qId, cmd) = do
-  corrId <- liftIO $ atomically getNextCorrId
-  let t = signTransmission $ encodeTransmission thVersion sessionId (corrId, qId, cmd)
-  r <- liftIO . atomically $ mkRequest corrId
+mkTransmission :: forall err msg. ProtocolEncoding err (ProtoCommand msg) => ProtocolClient err msg -> ClientCommand msg -> IO (PCTransmission err msg)
+mkTransmission ProtocolClient {sessionId, thVersion, client_ = PClient {clientCorrId, sentCommands}} (pKey, entId, cmd) = do
+  corrId <- atomically getNextCorrId
+  let t = signTransmission $ encodeTransmission thVersion sessionId (corrId, entId, cmd)
+  r <- atomically $ mkRequest corrId
   pure (t, r)
   where
     getNextCorrId :: STM CorrId
@@ -617,8 +759,8 @@ mkTransmission ProtocolClient {sessionId, thVersion, client_ = PClient {clientCo
       pure . CorrId $ bshow i
     signTransmission :: ByteString -> SentRawTransmission
     signTransmission t = ((`C.sign` t) <$> pKey, t)
-    mkRequest :: CorrId -> STM (TMVar (Response err msg))
+    mkRequest :: CorrId -> STM (Request err msg)
     mkRequest corrId = do
-      r <- newEmptyTMVar
-      TM.insert corrId (Request qId r) sentCommands
+      r <- Request entId <$> newEmptyTMVar
+      TM.insert corrId r sentCommands
       pure r

src/Simplex/Messaging/Client/Agent.hs

@@ -5,6 +5,7 @@
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE RankNTypes #-}
 {-# LANGUAGE ScopedTypeVariables #-}
+{-# LANGUAGE TupleSections #-}
 {-# LANGUAGE TypeApplications #-}
 {-# OPTIONS_GHC -fno-warn-orphans #-}
 
@@ -13,27 +14,35 @@ module Simplex.Messaging.Client.Agent where
 import Control.Concurrent (forkIO)
 import Control.Concurrent.Async (Async, uninterruptibleCancel)
 import Control.Logger.Simple
+import Control.Monad
 import Control.Monad.Except
 import Control.Monad.IO.Unlift
 import Control.Monad.Trans.Except
+import Data.Bifunctor (first, bimap)
 import Data.ByteString.Char8 (ByteString)
 import qualified Data.ByteString.Char8 as B
+import Data.Either (partitionEithers)
+import Data.List (partition)
+import Data.List.NonEmpty (NonEmpty)
+import qualified Data.List.NonEmpty as L
 import Data.Map.Strict (Map)
 import qualified Data.Map.Strict as M
+import Data.Maybe (listToMaybe)
 import Data.Set (Set)
 import Data.Text.Encoding
+import Data.Tuple (swap)
 import Numeric.Natural
 import Simplex.Messaging.Agent.RetryInterval
 import Simplex.Messaging.Client
 import qualified Simplex.Messaging.Crypto as C
 import Simplex.Messaging.Encoding.String
-import Simplex.Messaging.Protocol (BrokerMsg, ProtocolServer (..), QueueId, SMPServer)
+import Simplex.Messaging.Protocol (BrokerMsg, ProtocolServer (..), QueueId, SMPServer, NtfPrivateSignKey, NotifierId, RcvPrivateSignKey, RecipientId)
 import Simplex.Messaging.TMap (TMap)
 import qualified Simplex.Messaging.TMap as TM
 import Simplex.Messaging.Transport
-import Simplex.Messaging.Util (catchAll_, tryE, unlessM, ($>>=))
+import Simplex.Messaging.Util (catchAll_, ($>>=), toChunks)
 import System.Timeout (timeout)
-import UnliftIO (async, forConcurrently_)
+import UnliftIO (async)
 import UnliftIO.Exception (Exception)
 import qualified UnliftIO.Exception as E
 import UnliftIO.STM
@@ -44,8 +53,8 @@ data SMPClientAgentEvent
   = CAConnected SMPServer
   | CADisconnected SMPServer (Set SMPSub)
   | CAReconnected SMPServer
-  | CAResubscribed SMPServer SMPSub
-  | CASubError SMPServer SMPSub SMPClientError
+  | CAResubscribed SMPServer (NonEmpty SMPSub)
+  | CASubError SMPServer (NonEmpty (SMPSub, SMPClientError))
 
 data SMPSubParty = SPRecipient | SPNotifier
   deriving (Eq, Ord, Show)
@@ -58,7 +67,8 @@ data SMPClientAgentConfig = SMPClientAgentConfig
   { smpCfg :: ProtocolClientConfig,
     reconnectInterval :: RetryInterval,
     msgQSize :: Natural,
-    agentQSize :: Natural
+    agentQSize :: Natural,
+    agentSubsBatchSize :: Int
   }
 
 defaultSMPClientAgentConfig :: SMPClientAgentConfig
@@ -71,8 +81,9 @@ defaultSMPClientAgentConfig =
             increaseAfter = 10 * second,
             maxInterval = 10 * second
           },
-      msgQSize = 64,
-      agentQSize = 64
+      msgQSize = 256,
+      agentQSize = 256,
+      agentSubsBatchSize = 900
     }
   where
     second = 1000000
@@ -156,7 +167,7 @@ getSMPServerClient' ca@SMPClientAgent {agentCfg, smpClients, msgQ} srv =
           atomically $ modifyTVar' (asyncClients ca) (a :)
         connectAsync :: ExceptT SMPClientError IO ()
         connectAsync =
-          withRetryInterval (reconnectInterval agentCfg) $ \loop ->
+          withRetryInterval (reconnectInterval agentCfg) $ \_ loop ->
             void $ tryConnectClient (const reconnectClient) loop
 
     connectClient :: ExceptT SMPClientError IO SMPClient
@@ -184,9 +195,9 @@ getSMPServerClient' ca@SMPClientAgent {agentCfg, smpClients, msgQ} srv =
             _ -> TM.insert srv sVar ps
 
     serverDown :: Map SMPSub C.APrivateSignKey -> IO ()
-    serverDown ss = unless (M.null ss) . void . runExceptT $ do
+    serverDown ss = unless (M.null ss) $ do
       notify . CADisconnected srv $ M.keysSet ss
-      reconnectServer
+      void $ runExceptT reconnectServer
 
     reconnectServer :: ExceptT SMPClientError IO ()
     reconnectServer = do
@@ -195,33 +206,43 @@ getSMPServerClient' ca@SMPClientAgent {agentCfg, smpClients, msgQ} srv =
 
     tryReconnectClient :: ExceptT SMPClientError IO ()
     tryReconnectClient = do
-      withRetryInterval (reconnectInterval agentCfg) $ \loop ->
+      withRetryInterval (reconnectInterval agentCfg) $ \_ loop ->
         reconnectClient `catchE` const loop
 
     reconnectClient :: ExceptT SMPClientError IO ()
     reconnectClient = do
       withSMP ca srv $ \smp -> do
-        notify $ CAReconnected srv
-        cs <- atomically $ mapM readTVar =<< TM.lookup srv (pendingSrvSubs ca)
-        forConcurrently_ (maybe [] M.assocs cs) $ \sub@(s, _) ->
-          unlessM (atomically $ hasSub (srvSubs ca) srv s) $
-            subscribe_ smp sub `catchE` handleError s
+        liftIO $ notify $ CAReconnected srv
+        cs_ <- atomically $ mapM readTVar =<< TM.lookup srv (pendingSrvSubs ca)
+        forM_ cs_ $ \cs -> do
+          subs' <- filterM (fmap not . atomically . hasSub (srvSubs ca) srv . fst) $ M.assocs cs
+          let (nSubs, rSubs) = partition (isNotifier . fst . fst) subs'
+          subscribe_ smp SPNotifier nSubs
+          subscribe_ smp SPRecipient rSubs
       where
-        subscribe_ :: SMPClient -> (SMPSub, C.APrivateSignKey) -> ExceptT SMPClientError IO ()
-        subscribe_ smp sub@(s, _) = do
-          smpSubscribe smp sub
-          atomically $ addSubscription ca srv sub
-          notify $ CAResubscribed srv s
+        isNotifier = \case
+          SPNotifier -> True
+          SPRecipient -> False
 
-        handleError :: SMPSub -> SMPClientError -> ExceptT SMPClientError IO ()
-        handleError s = \case
-          e@PCEResponseTimeout -> throwE e
-          e@PCENetworkError -> throwE e
-          e -> do
-            notify $ CASubError srv s e
-            atomically $ removePendingSubscription ca srv s
+        subscribe_ :: SMPClient -> SMPSubParty -> [(SMPSub, C.APrivateSignKey)] -> ExceptT SMPClientError IO ()
+        subscribe_ smp party = mapM_ subscribeBatch . toChunks (agentSubsBatchSize agentCfg)
+          where
+            subscribeBatch subs' = do
+              let subs'' :: (NonEmpty (QueueId, C.APrivateSignKey)) = L.map (first snd) subs'
+              rs <- liftIO $ smpSubscribeQueues party ca smp srv subs''
+              let rs' :: (NonEmpty ((SMPSub, C.APrivateSignKey), Either SMPClientError ())) =
+                    L.zipWith (first . const) subs' rs
+                  rs'' :: [Either (SMPSub, SMPClientError) (SMPSub, C.APrivateSignKey)] =
+                    map (\(sub, r) -> bimap (fst sub,) (const sub) r) $ L.toList rs'
+                  (errs, oks) = partitionEithers rs''
+                  (tempErrs, finalErrs) = partition (temporaryClientError . snd) errs
+              mapM_ (atomically . addSubscription ca srv) oks
+              mapM_ (liftIO . notify . CAResubscribed srv) $ L.nonEmpty $ map fst oks
+              mapM_ (atomically . removePendingSubscription ca srv . fst) finalErrs 
+              mapM_ (liftIO . notify . CASubError srv) $ L.nonEmpty finalErrs
+              mapM_ (throwE . snd) $ listToMaybe tempErrs
 
-    notify :: SMPClientAgentEvent -> ExceptT SMPClientError IO ()
+    notify :: SMPClientAgentEvent -> IO ()
     notify evt = atomically $ writeTBQueue (agentQ ca) evt
 
 closeSMPClientAgent :: MonadUnliftIO m => SMPClientAgent -> m ()
@@ -252,17 +273,46 @@ withSMP ca srv action = (getSMPServerClient' ca srv >>= action) `catchE` logSMPE
 subscribeQueue :: SMPClientAgent -> SMPServer -> (SMPSub, C.APrivateSignKey) -> ExceptT SMPClientError IO ()
 subscribeQueue ca srv sub = do
   atomically $ addPendingSubscription ca srv sub
-  withSMP ca srv $ \smp -> subscribe_ smp `catchE` handleError
+  withSMP ca srv $ \smp -> subscribe_ smp `catchE` handleErr
   where
     subscribe_ smp = do
       smpSubscribe smp sub
       atomically $ addSubscription ca srv sub
 
-    handleError e = do
+    handleErr e = do
       atomically . when (e /= PCENetworkError && e /= PCEResponseTimeout) $
         removePendingSubscription ca srv $ fst sub
       throwE e
 
+subscribeQueuesSMP :: SMPClientAgent -> SMPServer -> NonEmpty (RecipientId, RcvPrivateSignKey) -> IO (NonEmpty (RecipientId, Either SMPClientError ()))
+subscribeQueuesSMP = subscribeQueues_ SPRecipient
+
+subscribeQueuesNtfs :: SMPClientAgent -> SMPServer -> NonEmpty (NotifierId, NtfPrivateSignKey) -> IO (NonEmpty (NotifierId, Either SMPClientError ()))
+subscribeQueuesNtfs = subscribeQueues_ SPNotifier
+
+subscribeQueues_ :: SMPSubParty -> SMPClientAgent -> SMPServer -> NonEmpty (QueueId, C.APrivateSignKey) -> IO (NonEmpty (QueueId, Either SMPClientError ()))
+subscribeQueues_ party ca srv subs = do
+  atomically $ forM_ subs $ addPendingSubscription ca srv . first (party,)
+  runExceptT (getSMPServerClient' ca srv) >>= \case
+    Left e -> pure $ L.map ((,Left e) . fst) subs
+    Right smp -> smpSubscribeQueues party ca smp srv subs
+
+smpSubscribeQueues :: SMPSubParty -> SMPClientAgent -> SMPClient -> SMPServer -> NonEmpty (QueueId, C.APrivateSignKey) -> IO (NonEmpty (QueueId, Either SMPClientError ()))
+smpSubscribeQueues party ca smp srv subs = do
+  rs <- L.zip subs <$> subscribe smp (L.map swap subs)
+  atomically $ forM rs $ \(sub, r) -> (fst sub,) <$> case r of
+    Right () -> do
+      addSubscription ca srv $ first (party,) sub
+      pure $ Right ()
+    Left e -> do
+      when (e /= PCENetworkError && e /= PCEResponseTimeout) $
+        removePendingSubscription ca srv $ (party,) $ fst sub
+      pure $ Left e
+  where
+    subscribe = case party of
+      SPRecipient -> subscribeSMPQueues
+      SPNotifier -> subscribeSMPQueuesNtfs
+
 showServer :: SMPServer -> ByteString
 showServer ProtocolServer {host, port} =
   strEncode host <> B.pack (if null port then "" else ':' : port)

src/Simplex/Messaging/Crypto.hs

@@ -127,8 +127,9 @@ module Simplex.Messaging.Crypto
     -- * pseudo-random bytes
     pseudoRandomBytes,
 
-    -- * hash
+    -- * digests
     sha256Hash,
+    sha512Hash,
 
     -- * Message padding / un-padding
     pad,
@@ -148,13 +149,14 @@ where
 
 import Control.Concurrent.STM
 import Control.Exception (Exception)
+import Control.Monad
 import Control.Monad.Except
 import Control.Monad.Trans.Except
 import Crypto.Cipher.AES (AES256)
 import qualified Crypto.Cipher.Types as AES
 import qualified Crypto.Cipher.XSalsa as XSalsa
 import qualified Crypto.Error as CE
-import Crypto.Hash (Digest, SHA256, hash)
+import Crypto.Hash (Digest, SHA256, SHA512, hash)
 import qualified Crypto.MAC.Poly1305 as Poly1305
 import qualified Crypto.PubKey.Curve25519 as X25519
 import qualified Crypto.PubKey.Curve448 as X448
@@ -179,6 +181,7 @@ import Data.Kind (Constraint, Type)
 import Data.String
 import Data.Type.Equality
 import Data.Typeable (Proxy (Proxy), Typeable)
+import Data.Word (Word32)
 import Data.X509
 import Database.SQLite.Simple.FromField (FromField (..))
 import Database.SQLite.Simple.ToField (ToField (..))
@@ -678,6 +681,9 @@ instance SignatureSize (Signature a) where
     SignatureEd25519 _ -> Ed25519.signatureSize
     SignatureEd448 _ -> Ed448.signatureSize
 
+instance SignatureSize ASignature where
+  signatureSize (ASignature _ s) = signatureSize s
+
 instance SignatureSize APrivateSignKey where
   signatureSize (APrivateSignKey _ k) = signatureSize k
 
@@ -718,9 +724,9 @@ data CryptoError
   | -- | header decryption error (could indicate that another key should be tried)
     CERatchetHeader
   | -- | too many skipped messages
-    CERatchetTooManySkipped
+    CERatchetTooManySkipped Word32
   | -- | earlier message number (or, possibly, skipped message that failed to decrypt?)
-    CERatchetEarlierMessage
+    CERatchetEarlierMessage Word32
   | -- | duplicate message number
     CERatchetDuplicateMessage
   deriving (Eq, Show, Exception)
@@ -809,6 +815,10 @@ instance FromField KeyHash where fromField = blobFieldDecoder $ parseAll strP
 sha256Hash :: ByteString -> ByteString
 sha256Hash = BA.convert . (hash :: ByteString -> Digest SHA256)
 
+-- | SHA512 digest.
+sha512Hash :: ByteString -> ByteString
+sha512Hash = BA.convert . (hash :: ByteString -> Digest SHA512)
+
 -- | AEAD-GCM encryption with associated data.
 --
 -- Used as part of double ratchet encryption.
@@ -1032,6 +1042,10 @@ instance ToJSON CbNonce where
 instance FromJSON CbNonce where
   parseJSON = strParseJSON "CbNonce"
 
+instance FromField CbNonce where fromField f = CryptoBoxNonce <$> fromField f
+
+instance ToField CbNonce where toField (CryptoBoxNonce s) = toField s
+
 cbNonce :: ByteString -> CbNonce
 cbNonce s
   | len == 24 = CryptoBoxNonce s
@@ -1072,6 +1086,10 @@ instance ToJSON SbKey where
 instance FromJSON SbKey where
   parseJSON = strParseJSON "SbKey"
 
+instance FromField SbKey where fromField f = SecretBoxKey <$> fromField f
+
+instance ToField SbKey where toField (SecretBoxKey s) = toField s
+
 sbKey :: ByteString -> Either String SbKey
 sbKey s
   | B.length s == 32 = Right $ SecretBoxKey s

src/Simplex/Messaging/Crypto/Lazy.hs

@@ -1,16 +1,17 @@
 {-# LANGUAGE BangPatterns #-}
 {-# LANGUAGE GADTs #-}
 {-# LANGUAGE LambdaCase #-}
-{-# LANGUAGE MultiWayIf #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE PatternSynonyms #-}
 {-# LANGUAGE ScopedTypeVariables #-}
 {-# LANGUAGE TupleSections #-}
 
 module Simplex.Messaging.Crypto.Lazy
-  ( sha512Hash,
+  ( sha256Hash,
+    sha512Hash,
     pad,
     unPad,
+    splitLen,
     sbEncrypt,
     sbDecrypt,
     sbEncryptTailTag,
@@ -21,15 +22,19 @@ module Simplex.Messaging.Crypto.Lazy
     sbInit,
     sbEncryptChunk,
     sbDecryptChunk,
+    sbEncryptChunkLazy,
+    sbDecryptChunkLazy,
     sbAuth,
+    LazyByteString,
   )
 where
 
 import qualified Crypto.Cipher.XSalsa as XSalsa
 import qualified Crypto.Error as CE
 import Crypto.Hash (Digest, hashlazy)
-import Crypto.Hash.Algorithms (SHA512)
+import Crypto.Hash.Algorithms (SHA256, SHA512)
 import qualified Crypto.MAC.Poly1305 as Poly1305
+import Data.Bifunctor (first)
 import Data.ByteArray (ByteArrayAccess)
 import qualified Data.ByteArray as BA
 import qualified Data.ByteString as S
@@ -37,6 +42,7 @@ import Data.ByteString.Char8 (ByteString)
 import qualified Data.ByteString.Char8 as B
 import qualified Data.ByteString.Lazy.Char8 as LB
 import qualified Data.ByteString.Lazy.Internal as LB
+import Data.Composition ((.:.))
 import Data.Int (Int64)
 import Data.List.NonEmpty (NonEmpty (..))
 import Foreign (sizeOf)
@@ -45,6 +51,10 @@ import Simplex.Messaging.Encoding
 
 type LazyByteString = LB.ByteString
 
+-- | SHA512 digest of a lazy bytestring.
+sha256Hash :: LazyByteString -> ByteString
+sha256Hash = BA.convert . (hashlazy :: LazyByteString -> Digest SHA256)
+
 -- | SHA512 digest of a lazy bytestring.
 sha512Hash :: LazyByteString -> ByteString
 sha512Hash = BA.convert . (hashlazy :: LazyByteString -> Digest SHA512)
@@ -73,11 +83,14 @@ fastReplicate n c
 -- this function does not validate the length of the message to avoid consuming all chunks,
 -- so it can return a shorter string than expected
 unPad :: LazyByteString -> Either CryptoError LazyByteString
-unPad padded
+unPad = fmap snd . splitLen
+
+splitLen :: LazyByteString -> Either CryptoError (Int64, LazyByteString)
+splitLen padded
   | LB.length lenStr == 8 = case smpDecode $ LB.toStrict lenStr of
     Right len
       | len < 0 -> Left CryptoInvalidMsgError
-      | otherwise -> Right $ LB.take len rest
+      | otherwise -> Right (len, LB.take len rest)
     Left _ -> Left CryptoInvalidMsgError
   | otherwise = Left CryptoInvalidMsgError
   where
@@ -107,9 +120,9 @@ sbDecrypt (SbKey key) (CbNonce nonce) packet
 secretBox :: ByteArrayAccess key => (SbState -> ByteString -> (ByteString, SbState)) -> key -> ByteString -> LazyByteString -> Either CryptoError (NonEmpty ByteString)
 secretBox sbProcess secret nonce msg = run <$> sbInit_ secret nonce
   where
-    process state = foldlChunks update ([], state) msg
-    update (cs, st) chunk = let (c, st') = sbProcess st chunk in (c : cs, st')
-    run state = let (cs, state') = process state in BA.convert (sbAuth state') :| reverse cs
+    run state =
+      let (!cs, !state') = secretBoxLazy_ sbProcess state msg
+       in BA.convert (sbAuth state') :| reverse cs
 
 -- | NaCl @secret_box@ lazy encrypt with a symmetric 256-bit key and 192-bit nonce with appended auth tag (more efficient with large files).
 sbEncryptTailTag :: SbKey -> CbNonce -> LazyByteString -> Int64 -> Int64 -> Either CryptoError LazyByteString
@@ -131,9 +144,15 @@ sbDecryptTailTag (SbKey key) (CbNonce nonce) paddedLen packet =
 secretBoxTailTag :: ByteArrayAccess key => (SbState -> ByteString -> (ByteString, SbState)) -> key -> ByteString -> LazyByteString -> Either CryptoError [ByteString]
 secretBoxTailTag sbProcess secret nonce msg = run <$> sbInit_ secret nonce
   where
-    process state = foldlChunks update ([], state) msg
-    update (cs, st) chunk = let (c, st') = sbProcess st chunk in (c : cs, st')
-    run state = let (cs, state') = process state in reverse $ BA.convert (sbAuth state') : cs
+    run state =
+      let (cs, state') = secretBoxLazy_ sbProcess state msg
+       in reverse $ BA.convert (sbAuth state') : cs
+
+-- passes lazy bytestring via initialized secret box returning the reversed list of chunks
+secretBoxLazy_ :: (SbState -> ByteString -> (ByteString, SbState)) -> SbState -> LazyByteString -> ([ByteString], SbState)
+secretBoxLazy_ sbProcess state = foldlChunks update ([], state)
+  where
+    update (cs, st) chunk = let (!c, !st') = sbProcess st chunk in (c : cs, st')
 
 type SbState = (XSalsa.State, Poly1305.State)
 
@@ -154,16 +173,26 @@ sbInit_ secret nonce = (state2,) <$> cryptoPassed (Poly1305.initialize rs)
     state1 = XSalsa.derive state0 iv1
     (rs :: ByteString, state2) = XSalsa.generate state1 32
 
+sbEncryptChunkLazy :: SbState -> LazyByteString -> (LazyByteString, SbState)
+sbEncryptChunkLazy = sbProcessChunkLazy_ sbEncryptChunk
+
+sbDecryptChunkLazy :: SbState -> LazyByteString -> (LazyByteString, SbState)
+sbDecryptChunkLazy = sbProcessChunkLazy_ sbDecryptChunk
+
+sbProcessChunkLazy_ :: (SbState -> ByteString -> (ByteString, SbState)) -> SbState -> LazyByteString -> (LazyByteString, SbState)
+sbProcessChunkLazy_ = first (LB.fromChunks . reverse) .:. secretBoxLazy_
+{-# INLINE sbProcessChunkLazy_ #-}
+
 sbEncryptChunk :: SbState -> ByteString -> (ByteString, SbState)
 sbEncryptChunk (st, authSt) chunk =
-  let (c, st') = XSalsa.combine st chunk
-      authSt' = Poly1305.update authSt c
+  let (!c, !st') = XSalsa.combine st chunk
+      !authSt' = Poly1305.update authSt c
    in (c, (st', authSt'))
 
 sbDecryptChunk :: SbState -> ByteString -> (ByteString, SbState)
 sbDecryptChunk (st, authSt) chunk =
-  let (s, st') = XSalsa.combine st chunk
-      authSt' = Poly1305.update authSt chunk
+  let (!s, !st') = XSalsa.combine st chunk
+      !authSt' = Poly1305.update authSt chunk
    in (s, (st', authSt'))
 
 sbAuth :: SbState -> Poly1305.Auth

src/Simplex/Messaging/Crypto/Ratchet.hs

@@ -15,6 +15,7 @@
 module Simplex.Messaging.Crypto.Ratchet where
 
 import Control.Monad.Except
+import Control.Monad.IO.Class
 import Control.Monad.Trans.Except
 import Crypto.Cipher.AES (AES256)
 import Crypto.Hash (SHA512)
@@ -38,7 +39,6 @@ import Simplex.Messaging.Crypto
 import Simplex.Messaging.Encoding
 import Simplex.Messaging.Encoding.String
 import Simplex.Messaging.Parsers (blobFieldDecoder, parseE, parseE')
-import Simplex.Messaging.Util (tryE)
 import Simplex.Messaging.Version
 
 currentE2EEncryptVersion :: Version
@@ -423,9 +423,9 @@ rcDecrypt rc@Ratchet {rcRcv, rcAD = Str rcAD} rcMKSkipped msg' = do
     skipMessageKeys :: Word32 -> Ratchet a -> Either CryptoError (Ratchet a, SkippedMsgKeys)
     skipMessageKeys _ r@Ratchet {rcRcv = Nothing} = Right (r, M.empty)
     skipMessageKeys untilN r@Ratchet {rcRcv = Just rr@RcvRatchet {rcCKr, rcHKr}, rcNr}
-      | rcNr > untilN + 1 = Left CERatchetEarlierMessage
+      | rcNr > untilN + 1 = Left $ CERatchetEarlierMessage (rcNr - untilN - 1)
       | rcNr == untilN + 1 = Left CERatchetDuplicateMessage
-      | rcNr + maxSkip < untilN = Left CERatchetTooManySkipped
+      | rcNr + maxSkip < untilN = Left $ CERatchetTooManySkipped (untilN + 1 - rcNr)
       | rcNr == untilN = Right (r, M.empty)
       | otherwise =
         let (rcCKr', rcNr', mks) = advanceRcvRatchet (untilN - rcNr) rcCKr rcNr M.empty

src/Simplex/Messaging/Notifications/Protocol.hs

@@ -429,7 +429,7 @@ data NtfSubStatus
     NSAuth
   | -- | SMP error other than AUTH
     NSErr ByteString
-  deriving (Eq, Show)
+  deriving (Eq, Ord, Show)
 
 ntfShouldSubscribe :: NtfSubStatus -> Bool
 ntfShouldSubscribe = \case

src/Simplex/Messaging/Notifications/Server.hs

@@ -12,15 +12,21 @@
 
 module Simplex.Messaging.Notifications.Server where
 
-import Control.Concurrent.STM (stateTVar)
 import Control.Logger.Simple
+import Control.Monad
 import Control.Monad.Except
 import Control.Monad.Reader
+import Data.Bifunctor (second)
 import Data.ByteString.Char8 (ByteString)
 import qualified Data.ByteString.Char8 as B
 import Data.Functor (($>))
-import Data.List (intercalate)
+import Data.Int (Int64)
+import Data.List (intercalate, sort)
+import Data.List.NonEmpty (NonEmpty(..))
+import qualified Data.List.NonEmpty as L
 import Data.Map.Strict (Map)
+import qualified Data.Map.Strict as M
+import Data.Maybe (catMaybes)
 import qualified Data.Text as T
 import Data.Text.Encoding (decodeLatin1)
 import Data.Time.Clock (UTCTime (..), diffTimeToPicoseconds, getCurrentTime)
@@ -50,7 +56,7 @@ import System.Exit (exitFailure)
 import System.IO (BufferMode (..), hPutStrLn, hSetBuffering)
 import System.Mem.Weak (deRefWeak)
 import UnliftIO (IOMode (..), async, uninterruptibleCancel, withFile)
-import UnliftIO.Concurrent (forkIO, killThread, mkWeakThreadId, threadDelay)
+import UnliftIO.Concurrent (forkIO, killThread, mkWeakThreadId)
 import UnliftIO.Directory (doesFileExist, renameFile)
 import UnliftIO.Exception
 import UnliftIO.STM
@@ -66,7 +72,7 @@ runNtfServerBlocking started cfg = runReaderT (ntfServer cfg started) =<< newNtf
 type M a = ReaderT NtfEnv IO a
 
 ntfServer :: NtfServerConfig -> TMVar Bool -> M ()
-ntfServer cfg@NtfServerConfig {transports, logTLSErrors} started = do
+ntfServer cfg@NtfServerConfig {transports, transportConfig = tCfg} started = do
   restoreServerStats
   s <- asks subscriber
   ps <- asks pushServer
@@ -77,7 +83,7 @@ ntfServer cfg@NtfServerConfig {transports, logTLSErrors} started = do
     runServer :: (ServiceName, ATransport) -> M ()
     runServer (tcpPort, ATransport t) = do
       serverParams <- asks tlsServerParams
-      runTransportServer started tcpPort serverParams logTLSErrors (runClient t)
+      runTransportServer started tcpPort serverParams tCfg (runClient t)
 
     runClient :: Transport c => TProxy c -> c -> M ()
     runClient _ h = do
@@ -97,11 +103,11 @@ ntfServer cfg@NtfServerConfig {transports, logTLSErrors} started = do
       [logServerStats logStatsStartTime interval serverStatsLogFile]
     serverStatsThread_ _ = []
 
-    logServerStats :: Int -> Int -> FilePath -> M ()
+    logServerStats :: Int64 -> Int64 -> FilePath -> M ()
     logServerStats startAt logInterval statsFilePath = do
       initialDelay <- (startAt -) . fromIntegral . (`div` 1000000_000000) . diffTimeToPicoseconds . utctDayTime <$> liftIO getCurrentTime
       liftIO $ putStrLn $ "server stats log enabled: " <> statsFilePath
-      threadDelay $ 1000000 * (initialDelay + if initialDelay < 0 then 86400 else 0)
+      liftIO $ threadDelay' $ 1000000 * (initialDelay + if initialDelay < 0 then 86400 else 0)
       NtfServerStats {fromTime, tknCreated, tknVerified, tknDeleted, subCreated, subDeleted, ntfReceived, ntfDelivered, activeTokens, activeSubs} <- asks serverStats
       let interval = 1000000 * logInterval
       withFile statsFilePath AppendMode $ \h -> liftIO $ do
@@ -136,28 +142,31 @@ ntfServer cfg@NtfServerConfig {transports, logTLSErrors} started = do
                 weekCount sub,
                 monthCount sub
               ]
-          threadDelay interval
+          threadDelay' interval
 
 resubscribe :: NtfSubscriber -> Map NtfSubscriptionId NtfSubData -> M ()
 resubscribe NtfSubscriber {newSubQ} subs = do
-  d <- asks $ resubscribeDelay . config
-  forM_ subs $ \sub@NtfSubData {} ->
-    whenM (ntfShouldSubscribe <$> readTVarIO (subStatus sub)) $ do
-      atomically $ writeTBQueue newSubQ $ NtfSub sub
-      threadDelay d
-  liftIO $ logInfo "SMP connections resubscribed"
+  subs' <- atomically $ filterM (fmap ntfShouldSubscribe . readTVar . subStatus) $ M.elems subs
+  atomically . writeTBQueue newSubQ $ map NtfSub subs'
+  liftIO $ logInfo $ "SMP resubscriptions queued (" <> tshow (length subs') <> " subscriptions)"
 
 ntfSubscriber :: NtfSubscriber -> M ()
 ntfSubscriber NtfSubscriber {smpSubscribers, newSubQ, smpAgent = ca@SMPClientAgent {msgQ, agentQ}} = do
   raceAny_ [subscribe, receiveSMP, receiveAgent]
   where
     subscribe :: M ()
-    subscribe =
-      forever $
-        atomically (readTBQueue newSubQ) >>= \case
-          sub@(NtfSub NtfSubData {smpQueue = SMPQueueNtf {smpServer}}) -> do
-            SMPSubscriber {newSubQ = subscriberSubQ} <- getSMPSubscriber smpServer
-            atomically $ writeTQueue subscriberSubQ sub
+    subscribe = forever $ do
+      subs <- atomically (readTBQueue newSubQ)
+      let ss = L.groupAllWith server subs
+      batchSize <- asks $ subsBatchSize . config
+      forM_ ss $ \serverSubs -> do
+        let srv = server $ L.head serverSubs
+            batches = toChunks batchSize $ L.toList serverSubs
+        SMPSubscriber {newSubQ = subscriberSubQ} <- getSMPSubscriber srv
+        mapM_ (atomically . writeTQueue subscriberSubQ) batches
+
+    server :: NtfEntityRec 'Subscription -> SMPServer
+    server (NtfSub sub) = ntfSubServer sub
 
     getSMPSubscriber :: SMPServer -> M SMPSubscriber
     getSMPSubscriber smpServer =
@@ -172,21 +181,36 @@ ntfSubscriber NtfSubscriber {smpSubscribers, newSubQ, smpAgent = ca@SMPClientAge
 
     runSMPSubscriber :: SMPSubscriber -> M ()
     runSMPSubscriber SMPSubscriber {newSubQ = subscriberSubQ} =
-      forever $
-        atomically (peekTQueue subscriberSubQ)
-          >>= \(NtfSub NtfSubData {smpQueue, notifierKey}) -> do
-            updateSubStatus smpQueue NSPending
-            let SMPQueueNtf {smpServer, notifierId} = smpQueue
-            liftIO (runExceptT $ subscribeQueue ca smpServer ((SPNotifier, notifierId), notifierKey)) >>= \case
-              Right _ -> do
-                updateSubStatus smpQueue NSActive
-                void . atomically $ readTQueue subscriberSubQ
-              Left err -> do
-                handleSubError smpQueue err
-                case err of
-                  PCEResponseTimeout -> pure ()
-                  PCENetworkError -> pure ()
-                  _ -> void . atomically $ readTQueue subscriberSubQ
+      forever $ do
+        subs <- atomically (peekTQueue subscriberSubQ)
+        let subs' = L.map (\(NtfSub sub) -> sub) subs
+            srv = server $ L.head subs
+        logSubStatus srv "subscribing" $ length subs
+        mapM_ (\NtfSubData {smpQueue} -> updateSubStatus smpQueue NSPending) subs'
+        rs <- liftIO $ subscribeQueues srv subs'
+        (subs'', oks, errs) <- foldM process ([], 0, []) rs
+        atomically $ do
+          void $ readTQueue subscriberSubQ
+          mapM_ (writeTQueue subscriberSubQ . L.map NtfSub) $ L.nonEmpty subs''
+        logSubStatus srv "retrying" $ length subs''
+        logSubStatus srv "subscribed" oks
+        logSubErrors srv errs
+      where
+        process :: ([NtfSubData], Int, [NtfSubStatus]) -> (NtfSubData, Either SMPClientError ()) -> M ([NtfSubData], Int, [NtfSubStatus])
+        process (subs, oks, errs) (sub@NtfSubData {smpQueue}, r) = case r of
+          Right _ -> updateSubStatus smpQueue NSActive $> (subs, oks + 1, errs)
+          Left e -> update <$> handleSubError smpQueue e
+          where
+            update = \case
+              Just err -> (subs, oks, err : errs) -- permanent error, log and don't retry subscription
+              Nothing -> (sub : subs, oks, errs) -- temporary error, retry subscription
+
+    -- | Subscribe to queues. The list of results can have a different order.
+    subscribeQueues :: SMPServer -> NonEmpty NtfSubData -> IO (NonEmpty (NtfSubData, Either SMPClientError ()))
+    subscribeQueues srv subs =
+      L.map (second snd) . L.zip subs <$> subscribeQueuesNtfs ca srv (L.map sub subs)
+      where
+        sub NtfSubData {smpQueue = SMPQueueNtf {notifierId}, notifierKey} = (notifierId, notifierKey)
 
     receiveSMP :: M ()
     receiveSMP = forever $ do
@@ -211,37 +235,43 @@ ntfSubscriber NtfSubscriber {smpSubscribers, newSubQ, smpAgent = ca@SMPClientAge
         atomically (readTBQueue agentQ) >>= \case
           CAConnected _ -> pure ()
           CADisconnected srv subs -> do
-            logInfo $ "SMP server disconnected " <> showServer' srv <> " (" <> tshow (length subs) <> ") subscriptions"
+            logSubStatus srv "disconnected" $ length subs
             forM_ subs $ \(_, ntfId) -> do
               let smpQueue = SMPQueueNtf srv ntfId
               updateSubStatus smpQueue NSInactive
           CAReconnected srv ->
             logInfo $ "SMP server reconnected " <> showServer' srv
-          CAResubscribed srv sub -> do
-            let ntfId = snd sub
-                smpQueue = SMPQueueNtf srv ntfId
-            updateSubStatus smpQueue NSActive
-          CASubError srv (_, ntfId) err -> do
-            logError $ "SMP subscription error on server " <> showServer' srv <> ": " <> tshow err
-            handleSubError (SMPQueueNtf srv ntfId) err
-      where
-        showServer' = decodeLatin1 . strEncode . host
+          CAResubscribed srv subs -> do
+            forM_ subs $ \(_, ntfId) -> updateSubStatus (SMPQueueNtf srv ntfId) NSActive
+            logSubStatus srv "resubscribed" $ length subs
+          CASubError srv errs ->
+            forM errs (\((_, ntfId), err) -> handleSubError (SMPQueueNtf srv ntfId) err)
+              >>= logSubErrors srv . catMaybes . L.toList
 
-    handleSubError :: SMPQueueNtf -> SMPClientError -> M ()
+    logSubStatus srv event n = when (n > 0) $
+      logInfo $ "SMP server " <> event <> " " <> showServer' srv <> " (" <> tshow n <> " subscriptions)"
+
+    logSubErrors :: SMPServer -> [NtfSubStatus] -> M ()        
+    logSubErrors srv errs = forM_ (L.group $ sort errs) $ \errs' -> do
+      logError $ "SMP subscription errors on server " <> showServer' srv <> ": " <> tshow (L.head errs') <> " (" <> tshow (length errs') <> " errors)"
+
+    showServer' = decodeLatin1 . strEncode . host
+
+    handleSubError :: SMPQueueNtf -> SMPClientError -> M (Maybe NtfSubStatus)
     handleSubError smpQueue = \case
-      PCEProtocolError AUTH -> updateSubStatus smpQueue NSAuth
+      PCEProtocolError AUTH -> updateSubStatus smpQueue NSAuth $> Just NSAuth
       PCEProtocolError e -> updateErr "SMP error " e
-      PCEIOError e -> updateErr "IOError " e
       PCEResponseError e -> updateErr "ResponseError " e
       PCEUnexpectedResponse r -> updateErr "UnexpectedResponse " r
       PCETransportError e -> updateErr "TransportError " e
       PCECryptoError e -> updateErr "CryptoError " e
-      PCEIncompatibleHost -> updateSubStatus smpQueue $ NSErr "IncompatibleHost"
-      PCEResponseTimeout -> pure ()
-      PCENetworkError -> pure ()
+      PCEIncompatibleHost -> let e = NSErr "IncompatibleHost" in updateSubStatus smpQueue e $> Just e
+      PCEResponseTimeout -> pure Nothing
+      PCENetworkError -> pure Nothing
+      PCEIOError _ -> pure Nothing
       where
-        updateErr :: Show e => ByteString -> e -> M ()
-        updateErr errType e = updateSubStatus smpQueue . NSErr $ errType <> bshow e
+        updateErr :: Show e => ByteString -> e -> M (Maybe NtfSubStatus)
+        updateErr errType e = updateSubStatus smpQueue (NSErr $ errType <> bshow e) $> Just (NSErr errType)
 
     updateSubStatus smpQueue status = do
       st <- asks store
@@ -335,7 +365,7 @@ receive th NtfServerClient {rcvQ, sndQ, activeAt} = forever $ do
 send :: Transport c => THandle c -> NtfServerClient -> IO ()
 send h@THandle {thVersion = v} NtfServerClient {sndQ, sessionId, activeAt} = forever $ do
   t <- atomically $ readTBQueue sndQ
-  void . liftIO $ tPut h [(Nothing, encodeTransmission v sessionId t)]
+  void . liftIO $ tPut h Nothing [(Nothing, encodeTransmission v sessionId t)]
   atomically . writeTVar activeAt =<< liftIO getSystemTime
 
 -- instance Show a => Show (TVar a) where
@@ -494,7 +524,7 @@ client NtfServerClient {rcvQ, sndQ} NtfSubscriber {newSubQ, smpAgent = ca} NtfPu
                 atomically $ TM.insert tknId notifier intervalNotifiers
                 where
                   intervalNotifier delay = forever $ do
-                    threadDelay delay
+                    liftIO $ threadDelay' delay
                     atomically $ writeTBQueue pushQ (tkn, PNCheckMessages)
       NtfReqNew corrId (ANE SSubscription newSub) -> do
         logDebug "SNEW - new subscription"
@@ -503,7 +533,7 @@ client NtfServerClient {rcvQ, sndQ} NtfSubscriber {newSubQ, smpAgent = ca} NtfPu
         sub <- atomically $ mkNtfSubData subId newSub
         resp <-
           atomically (addNtfSubscription st subId sub) >>= \case
-            Just _ -> atomically (writeTBQueue newSubQ $ NtfSub sub) $> NRSubId subId
+            Just _ -> atomically (writeTBQueue newSubQ [NtfSub sub]) $> NRSubId subId
             _ -> pure $ NRErr AUTH
         withNtfLog (`logCreateSubscription` sub)
         incNtfStat subCreated

src/Simplex/Messaging/Notifications/Server/Env.hs

@@ -11,6 +11,8 @@ import Control.Concurrent.Async (Async)
 import Control.Monad.IO.Unlift
 import Crypto.Random
 import Data.ByteString.Char8 (ByteString)
+import Data.Int (Int64)
+import Data.List.NonEmpty (NonEmpty)
 import Data.Time.Clock (getCurrentTime)
 import Data.Time.Clock.System (SystemTime)
 import Data.Word (Word16)
@@ -30,7 +32,7 @@ import Simplex.Messaging.Server.Expiration
 import Simplex.Messaging.TMap (TMap)
 import qualified Simplex.Messaging.TMap as TM
 import Simplex.Messaging.Transport (ATransport)
-import Simplex.Messaging.Transport.Server (loadFingerprint, loadTLSServerParams)
+import Simplex.Messaging.Transport.Server (loadFingerprint, loadTLSServerParams, TransportServerConfig)
 import System.IO (IOMode (..))
 import System.Mem.Weak (Weak)
 import UnliftIO.STM
@@ -44,19 +46,19 @@ data NtfServerConfig = NtfServerConfig
     pushQSize :: Natural,
     smpAgentCfg :: SMPClientAgentConfig,
     apnsConfig :: APNSPushClientConfig,
+    subsBatchSize :: Int,
     inactiveClientExpiration :: Maybe ExpirationConfig,
     storeLogFile :: Maybe FilePath,
-    resubscribeDelay :: Int, -- microseconds
     -- CA certificate private key is not needed for initialization
     caCertificateFile :: FilePath,
     privateKeyFile :: FilePath,
     certificateFile :: FilePath,
     -- stats config - see SMP server config
-    logStatsInterval :: Maybe Int,
-    logStatsStartTime :: Int,
+    logStatsInterval :: Maybe Int64,
+    logStatsStartTime :: Int64,
     serverStatsLogFile :: FilePath,
     serverStatsBackupFile :: Maybe FilePath,
-    logTLSErrors :: Bool
+    transportConfig :: TransportServerConfig
   }
 
 defaultInactiveClientExpiration :: ExpirationConfig
@@ -73,7 +75,6 @@ data NtfEnv = NtfEnv
     store :: NtfStore,
     storeLog :: Maybe (StoreLog 'WriteMode),
     idsDrg :: TVar ChaChaDRG,
-    serverIdentity :: C.KeyHash,
     tlsServerParams :: T.ServerParams,
     serverIdentity :: C.KeyHash,
     serverStats :: NtfServerStats
@@ -93,7 +94,7 @@ newNtfServerEnv config@NtfServerConfig {subQSize, pushQSize, smpAgentCfg, apnsCo
 
 data NtfSubscriber = NtfSubscriber
   { smpSubscribers :: TMap SMPServer SMPSubscriber,
-    newSubQ :: TBQueue (NtfEntityRec 'Subscription),
+    newSubQ :: TBQueue [NtfEntityRec 'Subscription],
     smpAgent :: SMPClientAgent
   }
 
@@ -105,7 +106,7 @@ newNtfSubscriber qSize smpAgentCfg = do
   pure NtfSubscriber {smpSubscribers, newSubQ, smpAgent}
 
 data SMPSubscriber = SMPSubscriber
-  { newSubQ :: TQueue (NtfEntityRec 'Subscription),
+  { newSubQ :: TQueue (NonEmpty (NtfEntityRec 'Subscription)),
     subThreadId :: TVar (Maybe (Weak ThreadId))
   }
 

src/Simplex/Messaging/Notifications/Server/Main.hs

@@ -14,7 +14,8 @@ import Data.Maybe (fromMaybe)
 import qualified Data.Text as T
 import Network.Socket (HostName)
 import Options.Applicative
-import Simplex.Messaging.Client.Agent (defaultSMPClientAgentConfig)
+import Simplex.Messaging.Client (ProtocolClientConfig (..))
+import Simplex.Messaging.Client.Agent (SMPClientAgentConfig (..), defaultSMPClientAgentConfig)
 import qualified Simplex.Messaging.Crypto as C
 import Simplex.Messaging.Notifications.Server (runNtfServer)
 import Simplex.Messaging.Notifications.Server.Env (NtfServerConfig (..))
@@ -22,13 +23,17 @@ import Simplex.Messaging.Notifications.Server.Push.APNS (defaultAPNSPushClientCo
 import Simplex.Messaging.Protocol (ProtoServerWithAuth (..), pattern NtfServer)
 import Simplex.Messaging.Server.CLI
 import Simplex.Messaging.Transport.Client (TransportHost (..))
+import Simplex.Messaging.Transport.Server (TransportServerConfig (..), defaultTransportServerConfig)
 import System.Directory (createDirectoryIfMissing, doesFileExist)
 import System.FilePath (combine)
 import System.IO (BufferMode (..), hSetBuffering, stderr, stdout)
 import Text.Read (readMaybe)
 
 ntfServerVersion :: String
-ntfServerVersion = "1.3.0"
+ntfServerVersion = "1.6.0"
+
+defaultSMPBatchDelay :: Int
+defaultSMPBatchDelay = 10000
 
 ntfServerCLI :: FilePath -> FilePath -> IO ()
 ntfServerCLI cfgPath logPath =
@@ -80,7 +85,9 @@ ntfServerCLI cfgPath logPath =
             <> ("host: " <> host <> "\n")
             <> ("port: " <> defaultServerPort <> "\n")
             <> "log_tls_errors: off\n\
-               \websockets: off\n"
+               \# delay between command batches sent to SMP relays (microseconds), 0 to disable\n"
+            <> ("smp_batch_delay: " <> show defaultSMPBatchDelay <> "\n")
+            <> "websockets: off\n"
     runServer ini = do
       hSetBuffering stdout LineBuffering
       hSetBuffering stderr LineBuffering
@@ -96,19 +103,21 @@ ntfServerCLI cfgPath logPath =
         enableStoreLog = settingIsOn "STORE_LOG" "enable" ini
         logStats = settingIsOn "STORE_LOG" "log_stats" ini
         c = combine cfgPath . ($ defaultX509Config)
+        smpBatchDelay = readIniDefault defaultSMPBatchDelay "TRANSPORT" "smp_batch_delay" ini
+        batchDelay = if smpBatchDelay <= 0 then Nothing else Just smpBatchDelay
         serverConfig =
           NtfServerConfig
             { transports = iniTransports ini,
               subIdBytes = 24,
               regCodeBytes = 32,
-              clientQSize = 16,
-              subQSize = 64,
-              pushQSize = 128,
-              smpAgentCfg = defaultSMPClientAgentConfig,
+              clientQSize = 64,
+              subQSize = 512,
+              pushQSize = 1048,
+              smpAgentCfg = defaultSMPClientAgentConfig {smpCfg = (smpCfg defaultSMPClientAgentConfig) {batchDelay}},
               apnsConfig = defaultAPNSPushClientConfig,
+              subsBatchSize = 900,
               inactiveClientExpiration = Nothing,
               storeLogFile = enableStoreLog $> storeLogFilePath,
-              resubscribeDelay = 50000, -- 50ms
               caCertificateFile = c caCrtFile,
               privateKeyFile = c serverKeyFile,
               certificateFile = c serverCrtFile,
@@ -116,7 +125,10 @@ ntfServerCLI cfgPath logPath =
               logStatsStartTime = 0, -- seconds from 00:00 UTC
               serverStatsLogFile = combine logPath "ntf-server-stats.daily.log",
               serverStatsBackupFile = logStats $> combine logPath "ntf-server-stats.log",
-              logTLSErrors = fromMaybe False $ iniOnOff "TRANSPORT" "log_tls_errors" ini
+              transportConfig =
+                defaultTransportServerConfig
+                  { logTLSErrors = fromMaybe False $ iniOnOff "TRANSPORT" "log_tls_errors" ini
+                  }
             }
 
 data CliCommand

src/Simplex/Messaging/Notifications/Server/Push/APNS.hs

@@ -12,7 +12,9 @@ module Simplex.Messaging.Notifications.Server.Push.APNS where
 
 import Control.Exception (Exception)
 import Control.Logger.Simple
+import Control.Monad
 import Control.Monad.Except
+import Control.Monad.IO.Class
 import Crypto.Hash.Algorithms (SHA256 (..))
 import qualified Crypto.PubKey.ECC.ECDSA as EC
 import qualified Crypto.PubKey.ECC.Types as ECT

src/Simplex/Messaging/Notifications/Server/Stats.hs

@@ -1,5 +1,6 @@
 {-# LANGUAGE DuplicateRecordFields #-}
 {-# LANGUAGE NamedFieldPuns #-}
+{-# LANGUAGE OverloadedRecordDot #-}
 {-# LANGUAGE OverloadedStrings #-}
 
 module Simplex.Messaging.Notifications.Server.Stats where
@@ -56,30 +57,30 @@ newNtfServerStats ts = do
 
 getNtfServerStatsData :: NtfServerStats -> STM NtfServerStatsData
 getNtfServerStatsData s = do
-  _fromTime <- readTVar $ fromTime (s :: NtfServerStats)
-  _tknCreated <- readTVar $ tknCreated s
-  _tknVerified <- readTVar $ tknVerified s
-  _tknDeleted <- readTVar $ tknDeleted s
-  _subCreated <- readTVar $ subCreated s
-  _subDeleted <- readTVar $ subDeleted s
-  _ntfReceived <- readTVar $ ntfReceived s
-  _ntfDelivered <- readTVar $ ntfDelivered s
-  _activeTokens <- getPeriodStatsData $ activeTokens s
-  _activeSubs <- getPeriodStatsData $ activeSubs s
+  _fromTime <- readTVar s.fromTime
+  _tknCreated <- readTVar s.tknCreated
+  _tknVerified <- readTVar s.tknVerified
+  _tknDeleted <- readTVar s.tknDeleted
+  _subCreated <- readTVar s.subCreated
+  _subDeleted <- readTVar s.subDeleted
+  _ntfReceived <- readTVar s.ntfReceived
+  _ntfDelivered <- readTVar s.ntfDelivered
+  _activeTokens <- getPeriodStatsData s.activeTokens
+  _activeSubs <- getPeriodStatsData s.activeSubs
   pure NtfServerStatsData {_fromTime, _tknCreated, _tknVerified, _tknDeleted, _subCreated, _subDeleted, _ntfReceived, _ntfDelivered, _activeTokens, _activeSubs}
 
 setNtfServerStats :: NtfServerStats -> NtfServerStatsData -> STM ()
 setNtfServerStats s d = do
-  writeTVar (fromTime (s :: NtfServerStats)) $! _fromTime (d :: NtfServerStatsData)
-  writeTVar (tknCreated s) $! _tknCreated d
-  writeTVar (tknVerified s) $! _tknVerified d
-  writeTVar (tknDeleted s) $! _tknDeleted d
-  writeTVar (subCreated s) $! _subCreated d
-  writeTVar (subDeleted s) $! _subDeleted d
-  writeTVar (ntfReceived s) $! _ntfReceived d
-  writeTVar (ntfDelivered s) $! _ntfDelivered d
-  setPeriodStats (activeTokens s) (_activeTokens d)
-  setPeriodStats (activeSubs s) (_activeSubs d)
+  writeTVar s.fromTime $! d._fromTime
+  writeTVar s.tknCreated $! _tknCreated d
+  writeTVar s.tknVerified $! _tknVerified d
+  writeTVar s.tknDeleted $! _tknDeleted d
+  writeTVar s.subCreated $! _subCreated d
+  writeTVar s.subDeleted $! _subDeleted d
+  writeTVar s.ntfReceived $! _ntfReceived d
+  writeTVar s.ntfDelivered $! _ntfDelivered d
+  setPeriodStats s.activeTokens (_activeTokens d)
+  setPeriodStats s.activeSubs (_activeSubs d)
 
 instance StrEncoding NtfServerStatsData where
   strEncode NtfServerStatsData {_fromTime, _tknCreated, _tknVerified, _tknDeleted, _subCreated, _subDeleted, _ntfReceived, _ntfDelivered, _activeTokens, _activeSubs} =

src/Simplex/Messaging/Notifications/Server/Store.hs

@@ -20,7 +20,7 @@ import qualified Data.Set as S
 import Data.Word (Word16)
 import qualified Simplex.Messaging.Crypto as C
 import Simplex.Messaging.Notifications.Protocol
-import Simplex.Messaging.Protocol (NtfPrivateSignKey)
+import Simplex.Messaging.Protocol (NtfPrivateSignKey, SMPServer)
 import Simplex.Messaging.TMap (TMap)
 import qualified Simplex.Messaging.TMap as TM
 import Simplex.Messaging.Util (whenM, ($>>=))
@@ -68,6 +68,9 @@ data NtfSubData = NtfSubData
     subStatus :: TVar NtfSubStatus
   }
 
+ntfSubServer :: NtfSubData -> SMPServer
+ntfSubServer NtfSubData {smpQueue = SMPQueueNtf {smpServer}} = smpServer
+
 data NtfEntityRec (e :: NtfEntity) where
   NtfTkn :: NtfTknData -> NtfEntityRec 'Token
   NtfSub :: NtfSubData -> NtfEntityRec 'Subscription

src/Simplex/Messaging/Notifications/Server/StoreLog.hs

@@ -5,6 +5,8 @@
 {-# LANGUAGE NamedFieldPuns #-}
 {-# LANGUAGE OverloadedStrings #-}
 
+{-# OPTIONS_GHC -fno-warn-ambiguous-fields #-}
+
 module Simplex.Messaging.Notifications.Server.StoreLog
   ( StoreLog,
     NtfStoreLogRecord (..),

src/Simplex/Messaging/Protocol.hs

@@ -15,6 +15,7 @@
 {-# LANGUAGE RankNTypes #-}
 {-# LANGUAGE ScopedTypeVariables #-}
 {-# LANGUAGE StandaloneDeriving #-}
+{-# LANGUAGE StrictData #-}
 {-# LANGUAGE TupleSections #-}
 {-# LANGUAGE TypeApplications #-}
 {-# LANGUAGE TypeFamilyDependencies #-}
@@ -65,8 +66,10 @@ module Simplex.Messaging.Protocol
     PrivHeader (..),
     Protocol (..),
     ProtocolType (..),
+    SProtocolType (..),
     AProtocolType (..),
     ProtocolTypeI (..),
+    UserProtocol,
     ProtocolServer (..),
     ProtoServer,
     SMPServer,
@@ -78,6 +81,7 @@ module Simplex.Messaging.Protocol
     pattern XFTPServer,
     XFTPServerWithAuth,
     ProtoServerWithAuth (..),
+    AProtoServerWithAuth (..),
     BasicAuth (..),
     SrvLoc (..),
     CorrId (..),
@@ -109,6 +113,7 @@ module Simplex.Messaging.Protocol
     SMPMsgMeta (..),
     NMsgMeta (..),
     MsgFlags (..),
+    userProtocol,
     rcvMessageMeta,
     noMsgFlags,
 
@@ -128,12 +133,15 @@ module Simplex.Messaging.Protocol
     noAuthSrv,
 
     -- * TCP transport functions
+    TransportBatch(..),
     tPut,
+    tPutLog,
     tGet,
     tParse,
     tDecodeParseValidate,
     tEncode,
     tEncodeBatch,
+    batchTransmissions,
 
     -- * exports for tests
     CommandTag (..),
@@ -142,6 +150,7 @@ module Simplex.Messaging.Protocol
 where
 
 import Control.Applicative (optional, (<|>))
+import Control.Concurrent (threadDelay)
 import Control.Monad.Except
 import Data.Aeson (FromJSON (..), ToJSON (..))
 import qualified Data.Aeson as J
@@ -150,6 +159,7 @@ import qualified Data.Attoparsec.ByteString.Char8 as A
 import Data.ByteString.Char8 (ByteString)
 import qualified Data.ByteString.Char8 as B
 import Data.Char (isPrint, isSpace)
+import Data.Constraint (Dict (..))
 import Data.Functor (($>))
 import Data.Kind
 import Data.List.NonEmpty (NonEmpty (..))
@@ -159,7 +169,7 @@ import Data.String
 import Data.Time.Clock.System (SystemTime (..))
 import Data.Type.Equality
 import GHC.Generics (Generic)
-import GHC.TypeLits (type (+))
+import GHC.TypeLits (ErrorMessage (..), TypeError, type (+))
 import Generic.Random (genericArbitraryU)
 import Network.Socket (HostName, ServiceName)
 import qualified Simplex.Messaging.Crypto as C
@@ -702,6 +712,10 @@ instance StrEncoding AProtocolType where
   strEncode (AProtocolType p) = strEncode p
   strP = aProtocolType <$> strP
 
+instance ProtocolTypeI p => ToJSON (SProtocolType p) where
+  toEncoding = strToJEncoding
+  toJSON = strToJSON
+
 instance ToJSON AProtocolType where
   toEncoding = strToJEncoding
   toJSON = strToJSON
@@ -720,6 +734,18 @@ instance ProtocolTypeI 'PNTF where protocolTypeI = SPNTF
 
 instance ProtocolTypeI 'PXFTP where protocolTypeI = SPXFTP
 
+type family UserProtocol (p :: ProtocolType) :: Constraint where
+  UserProtocol PSMP = ()
+  UserProtocol PXFTP = ()
+  UserProtocol a =
+    (Int ~ Bool, TypeError (Text "Servers for protocol " :<>: ShowType a :<>: Text " cannot be configured by the users"))
+
+userProtocol :: SProtocolType p -> Maybe (Dict (UserProtocol p))
+userProtocol = \case
+  SPSMP -> Just Dict
+  SPXFTP -> Just Dict
+  _ -> Nothing
+
 -- | server location and transport key digest (hash).
 data ProtocolServer p = ProtocolServer
   { scheme :: SProtocolType p,
@@ -729,6 +755,8 @@ data ProtocolServer p = ProtocolServer
   }
   deriving (Eq, Ord, Show)
 
+data AProtocolServer = forall p. ProtocolTypeI p => AProtocolServer (SProtocolType p) (ProtocolServer p)
+
 instance ProtocolTypeI p => IsString (ProtocolServer p) where
   fromString = parseString strDecode
 
@@ -744,7 +772,7 @@ instance ProtocolTypeI p => StrEncoding (ProtocolServer p) where
     strEncodeServer scheme (strEncode host) port keyHash Nothing
   strP =
     serverStrP >>= \case
-      (srv, Nothing) -> pure srv
+      (AProtocolServer _ srv, Nothing) -> either fail pure $ checkProtocolType srv
       _ -> fail "ProtocolServer with basic auth not allowed"
 
 instance ProtocolTypeI p => ToJSON (ProtocolServer p) where
@@ -780,10 +808,20 @@ data ProtoServerWithAuth p = ProtoServerWithAuth {protoServer :: ProtocolServer
 instance ProtocolTypeI p => IsString (ProtoServerWithAuth p) where
   fromString = parseString strDecode
 
+data AProtoServerWithAuth = forall p. ProtocolTypeI p => AProtoServerWithAuth (SProtocolType p) (ProtoServerWithAuth p)
+
+deriving instance Show AProtoServerWithAuth
+
 instance ProtocolTypeI p => StrEncoding (ProtoServerWithAuth p) where
   strEncode (ProtoServerWithAuth ProtocolServer {scheme, host, port, keyHash} auth_) =
     strEncodeServer scheme (strEncode host) port keyHash auth_
-  strP = uncurry ProtoServerWithAuth <$> serverStrP
+  strP = (\(AProtoServerWithAuth _ srv) -> checkProtocolType srv) <$?> strP
+
+instance StrEncoding AProtoServerWithAuth where
+  strEncode (AProtoServerWithAuth _ srv) = strEncode srv
+  strP =
+    serverStrP >>= \(AProtocolServer p srv, auth) ->
+      pure $ AProtoServerWithAuth p (ProtoServerWithAuth srv auth)
 
 instance ProtocolTypeI p => ToJSON (ProtoServerWithAuth p) where
   toJSON = strToJSON
@@ -792,6 +830,13 @@ instance ProtocolTypeI p => ToJSON (ProtoServerWithAuth p) where
 instance ProtocolTypeI p => FromJSON (ProtoServerWithAuth p) where
   parseJSON = strParseJSON "ProtoServerWithAuth"
 
+instance ToJSON AProtoServerWithAuth where
+  toJSON = strToJSON
+  toEncoding = strToJEncoding
+
+instance FromJSON AProtoServerWithAuth where
+  parseJSON = strParseJSON "AProtoServerWithAuth"
+
 noAuthSrv :: ProtocolServer p -> ProtoServerWithAuth p
 noAuthSrv srv = ProtoServerWithAuth srv Nothing
 
@@ -814,14 +859,15 @@ strEncodeServer scheme host port keyHash auth_ =
   where
     portStr = B.pack $ if null port then "" else ':' : port
 
-serverStrP :: ProtocolTypeI p => Parser (ProtocolServer p, Maybe BasicAuth)
+serverStrP :: Parser (AProtocolServer, Maybe BasicAuth)
 serverStrP = do
   scheme <- strP <* "://"
   keyHash <- strP
   auth_ <- optional $ A.char ':' *> strP
   TransportHosts host <- A.char '@' *> strP
   port <- portP <|> pure ""
-  pure (ProtocolServer {scheme, host, port, keyHash}, auth_)
+  pure $ case scheme of
+    AProtocolType s -> (AProtocolServer s $ ProtocolServer {scheme = s, host, port, keyHash}, auth_)
   where
     portP = show <$> (A.char ':' *> (A.decimal :: Parser Int))
 
@@ -1203,51 +1249,71 @@ instance Encoding CommandError where
       _ -> fail "bad command error type"
 
 -- | Send signed SMP transmission to TCP transport.
-tPut :: Transport c => THandle c -> NonEmpty SentRawTransmission -> IO [Either TransportError ()]
-tPut th trs
-  | batch th = tPutBatch [] $ L.map tEncode trs
-  | otherwise = forM (L.toList trs) $ tPutLog . tEncode
+tPut :: Transport c => THandle c -> Maybe Int -> NonEmpty SentRawTransmission -> IO [Either TransportError ()]
+tPut th delay_ = fmap concat . mapM tPutBatch . batchTransmissions (batch th) (blockSize th)
   where
-    tPutBatch :: [Either TransportError ()] -> NonEmpty ByteString -> IO [Either TransportError ()]
-    tPutBatch rs ts = do
+    tPutBatch :: TransportBatch -> IO [Either TransportError ()]
+    tPutBatch = \case
+      TBLargeTransmission -> [Left TELargeMsg] <$ putStrLn "tPut error: large message"
+      TBTransmissions n s -> replicate n <$> (tPutLog th (tEncodeBatch n s) <* mapM_ threadDelay delay_)
+      TBTransmission s -> (: []) <$> tPutLog th s
+
+tPutLog :: Transport c => THandle c -> ByteString -> IO (Either TransportError ())
+tPutLog th s = do
+  r <- tPutBlock th s
+  case r of
+    Left e -> putStrLn ("tPut error: " <> show e)
+    _ -> pure ()
+  pure r
+
+-- ByteString does not include length byte, it is added by tEncodeBatch
+data TransportBatch = TBTransmissions Int ByteString | TBTransmission ByteString |  TBLargeTransmission
+
+-- | encodes and batches transmissions into blocks, 
+batchTransmissions :: Bool -> Int -> NonEmpty SentRawTransmission -> [TransportBatch]
+batchTransmissions batch bSize
+  | batch = reverse . mkBatch [] . L.map tEncode
+  | otherwise = map (mkBatch1 . tEncode) . L.toList
+  where
+    mkBatch :: [TransportBatch] -> NonEmpty ByteString -> [TransportBatch]
+    mkBatch rs ts =
       let (n, s, ts_) = encodeBatch 0 "" ts
-      r <- if n == 0 then largeMsg else replicate n <$> tPutLog (tEncodeBatch n s)
-      let rs' = rs <> r
-      case ts_ of
-        Just ts' -> tPutBatch rs' ts'
-        _ -> pure rs'
-    largeMsg = putStrLn "tPut error: large message" >> pure [Left TELargeMsg]
-    tPutLog s = do
-      r <- tPutBlock th s
-      case r of
-        Left e -> putStrLn ("tPut error: " <> show e)
-        _ -> pure ()
-      pure r
+          r = if n == 0 then TBLargeTransmission else TBTransmissions n s
+          rs' = r : rs
+      in case ts_ of
+          Just ts' -> mkBatch rs' ts'
+          _ -> rs'
+    mkBatch1 :: ByteString -> TransportBatch
+    mkBatch1 s = if B.length s > bSize - 2 then TBLargeTransmission else TBTransmission s
     encodeBatch :: Int -> ByteString -> NonEmpty ByteString -> (Int, ByteString, Maybe (NonEmpty ByteString))
     encodeBatch n s ts@(t :| ts_)
       | n == 255 = (n, s, Just ts)
       | otherwise =
         let s' = s <> smpEncode (Large t)
             n' = n + 1
-         in if B.length s' > blockSize th - 1 -- one byte is reserved for the number of messages in the batch
+         in if B.length s' > bSize - 3 -- one byte is reserved for the number of messages in the batch
               then (n,s,) $ if n == 0 then L.nonEmpty ts_ else Just ts
               else case L.nonEmpty ts_ of
                 Just ts' -> encodeBatch n' s' ts'
                 _ -> (n', s', Nothing)
 
-tEncode :: (Maybe C.ASignature, ByteString) -> ByteString
+tEncode :: SentRawTransmission -> ByteString
 tEncode (sig, t) = smpEncode (C.signatureBytes sig) <> t
+{-# INLINE tEncode #-}
 
 tEncodeBatch :: Int -> ByteString -> ByteString
 tEncodeBatch n s = lenEncode n `B.cons` s
+{-# INLINE tEncodeBatch #-}
 
 encodeTransmission :: ProtocolEncoding e c => Version -> ByteString -> Transmission c -> ByteString
 encodeTransmission v sessionId (CorrId corrId, queueId, command) =
   smpEncode (sessionId, corrId, queueId) <> encodeProtocol v command
+{-# INLINE encodeTransmission #-}
 
 -- | Receive and parse transmission from the TCP transport (ignoring any trailing padding).
 tGetParse :: Transport c => THandle c -> IO (NonEmpty (Either TransportError RawTransmission))
 tGetParse th = eitherList (tParse $ batch th) <$> tGetBlock th
+{-# INLINE tGetParse #-}
 
 tParse :: Bool -> ByteString -> NonEmpty (Either TransportError RawTransmission)
 tParse batch s

src/Simplex/Messaging/Server.hs

@@ -1,5 +1,6 @@
 {-# LANGUAGE DataKinds #-}
 {-# LANGUAGE DuplicateRecordFields #-}
+{-# LANGUAGE OverloadedRecordDot #-}
 {-# LANGUAGE FlexibleContexts #-}
 {-# LANGUAGE GADTs #-}
 {-# LANGUAGE KindSignatures #-}
@@ -31,6 +32,7 @@ module Simplex.Messaging.Server
     disconnectTransport,
     verifyCmdSignature,
     dummyVerifyCmd,
+    randomId,
   )
 where
 
@@ -46,6 +48,7 @@ import Data.ByteString.Char8 (ByteString)
 import qualified Data.ByteString.Char8 as B
 import Data.Either (fromRight, partitionEithers)
 import Data.Functor (($>))
+import Data.Int (Int64)
 import Data.List (intercalate)
 import qualified Data.List.NonEmpty as L
 import qualified Data.Map.Strict as M
@@ -57,26 +60,29 @@ import Data.Time.Clock.System (SystemTime (..), getSystemTime)
 import Data.Time.Format.ISO8601 (iso8601Show)
 import Data.Type.Equality
 import GHC.TypeLits (KnownNat)
-import Network.Socket (ServiceName)
+import Network.Socket (ServiceName, Socket, socketToHandle)
+import Simplex.Messaging.Agent.Lock
 import qualified Simplex.Messaging.Crypto as C
 import Simplex.Messaging.Encoding (Encoding (smpEncode))
 import Simplex.Messaging.Encoding.String
 import Simplex.Messaging.Protocol
-import Simplex.Messaging.Server.Env.STM
+import Simplex.Messaging.Server.Control
+import Simplex.Messaging.Server.Env.STM as Env
 import Simplex.Messaging.Server.Expiration
 import Simplex.Messaging.Server.MsgStore
 import Simplex.Messaging.Server.MsgStore.STM
 import Simplex.Messaging.Server.QueueStore
-import Simplex.Messaging.Server.QueueStore.STM
+import Simplex.Messaging.Server.QueueStore.STM as QS
 import Simplex.Messaging.Server.Stats
 import Simplex.Messaging.Server.StoreLog
 import Simplex.Messaging.TMap (TMap)
 import qualified Simplex.Messaging.TMap as TM
 import Simplex.Messaging.Transport
+import Simplex.Messaging.Transport.Buffer (trimCR)
 import Simplex.Messaging.Transport.Server
 import Simplex.Messaging.Util
 import System.Exit (exitFailure)
-import System.IO (hPutStrLn)
+import System.IO (hPutStrLn, hSetNewlineMode, universalNewlineMode)
 import System.Mem.Weak (deRefWeak)
 import UnliftIO.Concurrent
 import UnliftIO.Directory (doesFileExist, renameFile)
@@ -102,26 +108,29 @@ runSMPServerBlocking started cfg = newEnv cfg >>= runReaderT (smpServer started
 type M a = ReaderT Env IO a
 
 smpServer :: TMVar Bool -> ServerConfig -> M ()
-smpServer started cfg@ServerConfig {transports, logTLSErrors} = do
+smpServer started cfg@ServerConfig {transports, transportConfig = tCfg} = do
   s <- asks server
   restoreServerMessages
   restoreServerStats
   raceAny_
     ( serverThread s subscribedQ subscribers subscriptions cancelSub :
-      serverThread s ntfSubscribedQ notifiers ntfSubscriptions (\_ -> pure ()) :
-      map runServer transports <> expireMessagesThread_ cfg <> serverStatsThread_ cfg
+      serverThread s ntfSubscribedQ Env.notifiers ntfSubscriptions (\_ -> pure ()) :
+      map runServer transports <> expireMessagesThread_ cfg <> serverStatsThread_ cfg <> controlPortThread_ cfg
     )
-    `finally` (withLog closeStoreLog >> saveServerMessages >> saveServerStats)
+    `finally` withLock (savingLock s) "final" (saveServer False)
   where
     runServer :: (ServiceName, ATransport) -> M ()
     runServer (tcpPort, ATransport t) = do
       serverParams <- asks tlsServerParams
-      runTransportServer started tcpPort serverParams logTLSErrors (runClient t)
+      runTransportServer started tcpPort serverParams tCfg (runClient t)
+
+    saveServer :: Bool -> M ()
+    saveServer keepMsgs = withLog closeStoreLog >> saveServerMessages keepMsgs >> saveServerStats
 
     serverThread ::
       forall s.
       Server ->
-      (Server -> TBQueue (QueueId, Client)) ->
+      (Server -> TQueue (QueueId, Client)) ->
       (Server -> TMap QueueId Client) ->
       (Client -> TMap QueueId s) ->
       (s -> IO ()) ->
@@ -133,7 +142,7 @@ smpServer started cfg@ServerConfig {transports, logTLSErrors} = do
       where
         updateSubscribers :: STM (Maybe (QueueId, Client))
         updateSubscribers = do
-          (qId, clnt) <- readTBQueue $ subQ s
+          (qId, clnt) <- readTQueue $ subQ s
           let clientToBeNotified = \c' ->
                 if sameClientSession clnt c'
                   then pure Nothing
@@ -157,7 +166,7 @@ smpServer started cfg@ServerConfig {transports, logTLSErrors} = do
       quota <- asks $ msgQueueQuota . config
       let interval = checkInterval expCfg * 1000000
       forever $ do
-        threadDelay interval
+        liftIO $ threadDelay' interval
         old <- liftIO $ expireBeforeEpoch expCfg
         rIds <- M.keysSet <$> readTVarIO ms
         forM_ rIds $ \rId ->
@@ -169,11 +178,11 @@ smpServer started cfg@ServerConfig {transports, logTLSErrors} = do
       [logServerStats logStatsStartTime interval serverStatsLogFile]
     serverStatsThread_ _ = []
 
-    logServerStats :: Int -> Int -> FilePath -> M ()
+    logServerStats :: Int64 -> Int64 -> FilePath -> M ()
     logServerStats startAt logInterval statsFilePath = do
       initialDelay <- (startAt -) . fromIntegral . (`div` 1000000_000000) . diffTimeToPicoseconds . utctDayTime <$> liftIO getCurrentTime
       liftIO $ putStrLn $ "server stats log enabled: " <> statsFilePath
-      threadDelay $ 1000000 * (initialDelay + if initialDelay < 0 then 86400 else 0)
+      liftIO $ threadDelay' $ 1000000 * (initialDelay + if initialDelay < 0 then 86400 else 0)
       ServerStats {fromTime, qCreated, qSecured, qDeleted, msgSent, msgRecv, activeQueues, msgSentNtf, msgRecvNtf, activeQueuesNtf, qCount, msgCount} <- asks serverStats
       let interval = 1000000 * logInterval
       withFile statsFilePath AppendMode $ \h -> liftIO $ do
@@ -212,7 +221,7 @@ smpServer started cfg@ServerConfig {transports, logTLSErrors} = do
                 show qCount',
                 show msgCount'
               ]
-          threadDelay interval
+          threadDelay' interval
 
     runClient :: Transport c => TProxy c -> c -> M ()
     runClient _ h = do
@@ -222,6 +231,57 @@ smpServer started cfg@ServerConfig {transports, logTLSErrors} = do
         Right th -> runClientTransport th
         Left _ -> pure ()
 
+    controlPortThread_ :: ServerConfig -> [M ()]
+    controlPortThread_ ServerConfig {controlPort = Just port} = [runCPServer port]
+    controlPortThread_ _ = []
+
+    runCPServer :: ServiceName -> M ()
+    runCPServer port = do
+      srv <- asks server
+      cpStarted <- newEmptyTMVarIO
+      u <- askUnliftIO
+      liftIO $ runTCPServer cpStarted port $ runCPClient u srv
+      where
+        runCPClient :: UnliftIO (ReaderT Env IO) -> Server -> Socket -> IO ()
+        runCPClient u srv sock = do
+          h <- socketToHandle sock ReadWriteMode
+          hSetBuffering h LineBuffering
+          hSetNewlineMode h universalNewlineMode
+          hPutStrLn h "SMP server control port\n'help' for supported commands"
+          cpLoop h
+          where
+            cpLoop h = do
+              s <- B.hGetLine h
+              case strDecode $ trimCR s of
+                Right CPQuit -> hClose h
+                Right cmd -> processCP h cmd >> cpLoop h
+                Left err -> hPutStrLn h ("error: " <> err) >> cpLoop h
+            processCP h = \case
+              CPSuspend -> hPutStrLn h "suspend not implemented"
+              CPResume -> hPutStrLn h "resume not implemented"
+              CPClients -> hPutStrLn h "clients not implemented"
+              CPStats -> do
+                ServerStats {fromTime, qCreated, qSecured, qDeleted, msgSent, msgRecv, msgSentNtf, msgRecvNtf, qCount, msgCount} <- unliftIO u $ asks serverStats
+                putStat "fromTime" fromTime
+                putStat "qCreated" qCreated
+                putStat "qSecured" qSecured
+                putStat "qDeleted" qDeleted
+                putStat "msgSent" msgSent
+                putStat "msgRecv" msgRecv
+                putStat "msgSentNtf" msgSentNtf
+                putStat "msgRecvNtf" msgRecvNtf
+                putStat "qCount" qCount
+                putStat "msgCount" msgCount
+                where
+                  putStat :: Show a => String -> TVar a -> IO ()
+                  putStat label var = readTVarIO var >>= \v -> hPutStrLn h $ label <> ": " <> show v
+              CPSave -> withLock (savingLock srv) "control" $ do
+                hPutStrLn h "saving server state..."
+                unliftIO u $ saveServer True
+                hPutStrLn h "server state saved!"
+              CPHelp -> hPutStrLn h "commands: stats, save, help, quit"
+              CPQuit -> pure ()
+
 runClientTransport :: Transport c => THandle c -> M ()
 runClientTransport th@THandle {thVersion, sessionId} = do
   q <- asks $ tbqSize . config
@@ -280,19 +340,20 @@ receive th Client {rcvQ, sndQ, activeAt} = forever $ do
 send :: Transport c => THandle c -> Client -> IO ()
 send h@THandle {thVersion = v} Client {sndQ, sessionId, activeAt} = forever $ do
   ts <- atomically $ L.sortWith tOrder <$> readTBQueue sndQ
-  void . liftIO . tPut h $ L.map ((Nothing,) . encodeTransmission v sessionId) ts
+  void . liftIO . tPut h Nothing $ L.map ((Nothing,) . encodeTransmission v sessionId) ts
   atomically . writeTVar activeAt =<< liftIO getSystemTime
   where
     tOrder :: Transmission BrokerMsg -> Int
     tOrder (_, _, cmd) = case cmd of
       MSG {} -> 0
+      NMSG {} -> 0
       _ -> 1
 
 disconnectTransport :: Transport c => THandle c -> client -> (client -> TVar SystemTime) -> ExpirationConfig -> IO ()
 disconnectTransport THandle {connection} c activeAt expCfg = do
   let interval = checkInterval expCfg * 1000000
   forever . liftIO $ do
-    threadDelay interval
+    threadDelay' interval
     old <- expireBeforeEpoch expCfg
     ts <- readTVarIO $ activeAt c
     when (systemSeconds ts < old) $ closeConnection connection
@@ -475,7 +536,7 @@ client clnt@Client {thVersion, subscriptions, ntfSubscriptions, rcvQ, sndQ} Serv
           where
             newSub :: m (TVar Sub)
             newSub = time "SUB newSub" . atomically $ do
-              writeTBQueue subscribedQ (rId, clnt)
+              writeTQueue subscribedQ (rId, clnt)
               sub <- newTVar =<< newSubscription NoSub
               TM.insert rId sub subscriptions
               pure sub
@@ -520,7 +581,7 @@ client clnt@Client {thVersion, subscriptions, ntfSubscriptions, rcvQ, sndQ} Serv
         subscribeNotifications :: m (Transmission BrokerMsg)
         subscribeNotifications = time "NSUB" . atomically $ do
           unlessM (TM.member queueId ntfSubscriptions) $ do
-            writeTBQueue ntfSubscribedQ (queueId, clnt)
+            writeTQueue ntfSubscribedQ (queueId, clnt)
             TM.insert queueId () ntfSubscriptions
           pure ok
 
@@ -663,11 +724,11 @@ client clnt@Client {thVersion, subscriptions, ntfSubscriptions, rcvQ, sndQ} Serv
             encrypt msgFlags body =
               let encBody = EncRcvMsgBody $ C.cbEncryptMaxLenBS (rcvDhSecret qr) (C.cbNonce msgId') body
                in RcvMessage msgId' msgTs' msgFlags encBody
-            msgId' = msgId (msg :: Message)
-            msgTs' = msgTs (msg :: Message)
+            msgId' = msg.msgId
+            msgTs' = msg.msgTs
 
         setDelivered :: Sub -> Message -> STM Bool
-        setDelivered s msg = tryPutTMVar (delivered s) $ msgId (msg :: Message)
+        setDelivered s msg = tryPutTMVar (delivered s) $ msg.msgId
 
         getStoreMsgQueue :: T.Text -> RecipientId -> m MsgQueue
         getStoreMsgQueue name rId = time (name <> " getMsgQueue") $ do
@@ -718,8 +779,8 @@ randomId n = do
   gVar <- asks idsDrg
   atomically (C.pseudoRandomBytes n gVar)
 
-saveServerMessages :: (MonadUnliftIO m, MonadReader Env m) => m ()
-saveServerMessages = asks (storeMsgsFile . config) >>= mapM_ saveMessages
+saveServerMessages :: (MonadUnliftIO m, MonadReader Env m) => Bool -> m ()
+saveServerMessages keepMsgs = asks (storeMsgsFile . config) >>= mapM_ saveMessages
   where
     saveMessages f = do
       logInfo $ "saving messages to file " <> T.pack f
@@ -728,8 +789,9 @@ saveServerMessages = asks (storeMsgsFile . config) >>= mapM_ saveMessages
         readTVarIO ms >>= mapM_ (saveQueueMsgs ms h) . M.keys
       logInfo "messages saved"
       where
+        getMessages = if keepMsgs then snapshotMsgQueue else flushMsgQueue
         saveQueueMsgs ms h rId =
-          atomically (flushMsgQueue ms rId)
+          atomically (getMessages ms rId)
             >>= mapM_ (B.hPutStrLn h . strEncode . MLRv3 rId)
 
 restoreServerMessages :: forall m. (MonadUnliftIO m, MonadReader Env m) => m ()
@@ -740,7 +802,8 @@ restoreServerMessages = asks (storeMsgsFile . config) >>= mapM_ restoreMessages
       st <- asks queueStore
       ms <- asks msgStore
       quota <- asks $ msgQueueQuota . config
-      runExceptT (liftIO (B.readFile f) >>= mapM_ (restoreMsg st ms quota) . B.lines) >>= \case
+      old_ <- asks (messageExpiration . config) $>>= (liftIO . fmap Just . expireBeforeEpoch)
+      runExceptT (liftIO (B.readFile f) >>= mapM_ (restoreMsg st ms quota old_) . B.lines) >>= \case
         Left e -> do
           logError . T.pack $ "error restoring messages: " <> e
           liftIO exitFailure
@@ -748,7 +811,7 @@ restoreServerMessages = asks (storeMsgsFile . config) >>= mapM_ restoreMessages
           renameFile f $ f <> ".bak"
           logInfo "messages restored"
       where
-        restoreMsg st ms quota s = do
+        restoreMsg st ms quota old_ s = do
           r <- liftEither . first (msgErr "parsing") $ strDecode s
           case r of
             MLRv3 rId msg -> addToMsgQueue rId msg
@@ -758,13 +821,14 @@ restoreServerMessages = asks (storeMsgsFile . config) >>= mapM_ restoreMessages
               addToMsgQueue rId msg'
           where
             addToMsgQueue rId msg = do
-              full <- atomically $ do
+              logFull <- atomically $ do
                 q <- getMsgQueue ms rId quota
-                isNothing <$> writeMsg q msg
-              case msg of
-                Message {} ->
-                  when full . logError . decodeLatin1 $ "message queue " <> strEncode rId <> " is full, message not restored: " <> strEncode (msgId (msg :: Message))
-                MessageQuota {} -> pure ()
+                case msg of
+                  Message {msgTs}
+                    | maybe True (systemSeconds msgTs >=) old_ -> isNothing <$> writeMsg q msg
+                    | otherwise -> pure False
+                  MessageQuota {} -> writeMsg q msg $> False
+              when logFull . logError . decodeLatin1 $ "message queue " <> strEncode rId <> " is full, message not restored: " <> strEncode msg.msgId
             updateMsgV1toV3 QueueRec {rcvDhSecret} RcvMessage {msgId, msgTs, msgFlags, msgBody = EncRcvMsgBody body} = do
               let nonce = C.cbNonce msgId
               msgBody <- liftEither . first (msgErr "v1 message decryption") $ C.maxLenBS =<< C.cbDecrypt rcvDhSecret nonce body

src/Simplex/Messaging/Server/CLI.hs

@@ -164,6 +164,9 @@ strictIni section key ini =
 readStrictIni :: Read a => Text -> Text -> Ini -> a
 readStrictIni section key = read . T.unpack . strictIni section key
 
+readIniDefault :: Read a => a -> Text -> Text -> Ini -> a
+readIniDefault def section key = either (const def) (read . T.unpack) . lookupValue section key
+
 iniOnOff :: Text -> Text -> Ini -> Maybe Bool
 iniOnOff section name ini = case lookupValue section name ini of
   Right "on" -> Just True

src/Simplex/Messaging/Server/Control.hs

@@ -0,0 +1,36 @@
+{-# LANGUAGE LambdaCase #-}
+{-# LANGUAGE OverloadedStrings #-}
+
+module Simplex.Messaging.Server.Control where
+
+import qualified Data.Attoparsec.ByteString.Char8 as A
+import Simplex.Messaging.Encoding.String
+
+data ControlProtocol
+  = CPSuspend
+  | CPResume
+  | CPClients
+  | CPStats
+  | CPSave
+  | CPHelp
+  | CPQuit
+
+instance StrEncoding ControlProtocol where
+  strEncode = \case
+    CPSuspend -> "suspend"
+    CPResume -> "resume"
+    CPClients -> "clients"
+    CPStats -> "stats"
+    CPSave -> "save"
+    CPHelp -> "help"
+    CPQuit -> "quit"
+  strP =
+    A.takeTill (== ' ') >>= \case
+      "suspend" -> pure CPSuspend
+      "resume" -> pure CPResume
+      "clients" -> pure CPClients
+      "stats" -> pure CPStats
+      "save" -> pure CPSave
+      "help" -> pure CPHelp
+      "quit" -> pure CPQuit
+      _ -> fail "bad ControlProtocol command"

src/Simplex/Messaging/Server/Env/STM.hs

@@ -9,6 +9,7 @@ import Control.Concurrent (ThreadId)
 import Control.Monad.IO.Unlift
 import Crypto.Random
 import Data.ByteString.Char8 (ByteString)
+import Data.Int (Int64)
 import Data.List.NonEmpty (NonEmpty)
 import Data.Map.Strict (Map)
 import qualified Data.Map.Strict as M
@@ -18,6 +19,7 @@ import Data.X509.Validation (Fingerprint (..))
 import Network.Socket (ServiceName)
 import qualified Network.TLS as T
 import Numeric.Natural
+import Simplex.Messaging.Agent.Lock
 import Simplex.Messaging.Crypto (KeyHash (..))
 import Simplex.Messaging.Protocol
 import Simplex.Messaging.Server.Expiration
@@ -29,7 +31,7 @@ import Simplex.Messaging.Server.StoreLog
 import Simplex.Messaging.TMap (TMap)
 import qualified Simplex.Messaging.TMap as TM
 import Simplex.Messaging.Transport (ATransport)
-import Simplex.Messaging.Transport.Server (loadFingerprint, loadTLSServerParams)
+import Simplex.Messaging.Transport.Server (loadFingerprint, loadTLSServerParams, TransportServerConfig)
 import Simplex.Messaging.Version
 import System.IO (IOMode (..))
 import System.Mem.Weak (Weak)
@@ -38,7 +40,7 @@ import UnliftIO.STM
 data ServerConfig = ServerConfig
   { transports :: [(ServiceName, ATransport)],
     tbqSize :: Natural,
-    serverTbqSize :: Natural,
+    -- serverTbqSize :: Natural,
     msgQueueQuota :: Int,
     queueIdBytes :: Int,
     msgIdBytes :: Int,
@@ -54,10 +56,10 @@ data ServerConfig = ServerConfig
     -- and check interval, seconds
     inactiveClientExpiration :: Maybe ExpirationConfig,
     -- | log SMP server usage statistics, only aggregates are logged, seconds
-    logStatsInterval :: Maybe Int,
+    logStatsInterval :: Maybe Int64,
     -- | time of the day when the stats are logged first, to log at consistent times,
     -- irrespective of when the server is started (seconds from 00:00 UTC)
-    logStatsStartTime :: Int,
+    logStatsStartTime :: Int64,
     -- | file to log stats
     serverStatsLogFile :: FilePath,
     -- | file to save and restore stats
@@ -68,13 +70,19 @@ data ServerConfig = ServerConfig
     certificateFile :: FilePath,
     -- | SMP client-server protocol version range
     smpServerVRange :: VersionRange,
-    logTLSErrors :: Bool
+    -- | TCP transport config
+    transportConfig :: TransportServerConfig,
+    -- | run listener on control port
+    controlPort :: Maybe ServiceName
   }
 
+defMsgExpirationDays :: Int64
+defMsgExpirationDays = 21
+
 defaultMessageExpiration :: ExpirationConfig
 defaultMessageExpiration =
   ExpirationConfig
-    { ttl = 30 * 86400, -- seconds, 30 days
+    { ttl = defMsgExpirationDays * 86400, -- seconds
       checkInterval = 43200 -- seconds, 12 hours
     }
 
@@ -98,10 +106,11 @@ data Env = Env
   }
 
 data Server = Server
-  { subscribedQ :: TBQueue (RecipientId, Client),
+  { subscribedQ :: TQueue (RecipientId, Client),
     subscribers :: TMap RecipientId Client,
-    ntfSubscribedQ :: TBQueue (NotifierId, Client),
-    notifiers :: TMap NotifierId Client
+    ntfSubscribedQ :: TQueue (NotifierId, Client),
+    notifiers :: TMap NotifierId Client,
+    savingLock :: Lock
   }
 
 data Client = Client
@@ -122,13 +131,14 @@ data Sub = Sub
     delivered :: TMVar MsgId
   }
 
-newServer :: Natural -> STM Server
-newServer qSize = do
-  subscribedQ <- newTBQueue qSize
+newServer :: STM Server
+newServer = do
+  subscribedQ <- newTQueue
   subscribers <- TM.empty
-  ntfSubscribedQ <- newTBQueue qSize
+  ntfSubscribedQ <- newTQueue
   notifiers <- TM.empty
-  return Server {subscribedQ, subscribers, ntfSubscribedQ, notifiers}
+  savingLock <- createLock
+  return Server {subscribedQ, subscribers, ntfSubscribedQ, notifiers, savingLock}
 
 newClient :: Natural -> Version -> ByteString -> SystemTime -> STM Client
 newClient qSize thVersion sessionId ts = do
@@ -147,26 +157,25 @@ newSubscription subThread = do
 
 newEnv :: forall m. (MonadUnliftIO m, MonadRandom m) => ServerConfig -> m Env
 newEnv config@ServerConfig {caCertificateFile, certificateFile, privateKeyFile, storeLogFile} = do
-  server <- atomically $ newServer (serverTbqSize config)
+  server <- atomically newServer
   queueStore <- atomically newQueueStore
   msgStore <- atomically newMsgStore
   idsDrg <- drgNew >>= newTVarIO
-  storeLog <- liftIO $ openReadStoreLog `mapM` storeLogFile
-  s' <- restoreQueues queueStore `mapM` storeLog
+  storeLog <- restoreQueues queueStore `mapM` storeLogFile
   tlsServerParams <- liftIO $ loadTLSServerParams caCertificateFile certificateFile privateKeyFile
   Fingerprint fp <- liftIO $ loadFingerprint caCertificateFile
   let serverIdentity = KeyHash fp
   serverStats <- atomically . newServerStats =<< liftIO getCurrentTime
-  return Env {config, server, serverIdentity, queueStore, msgStore, idsDrg, storeLog = s', tlsServerParams, serverStats}
+  return Env {config, server, serverIdentity, queueStore, msgStore, idsDrg, storeLog, tlsServerParams, serverStats}
   where
-    restoreQueues :: QueueStore -> StoreLog 'ReadMode -> m (StoreLog 'WriteMode)
-    restoreQueues QueueStore {queues, senders, notifiers} s = do
-      (qs, s') <- liftIO $ readWriteStoreLog s
+    restoreQueues :: QueueStore -> FilePath -> m (StoreLog 'WriteMode)
+    restoreQueues QueueStore {queues, senders, notifiers} f = do
+      (qs, s) <- liftIO $ readWriteStoreLog f
       atomically $ do
         writeTVar queues =<< mapM newTVar qs
         writeTVar senders $! M.foldr' addSender M.empty qs
         writeTVar notifiers $! M.foldr' addNotifier M.empty qs
-      pure s'
+      pure s
     addSender :: QueueRec -> Map SenderId RecipientId -> Map SenderId RecipientId
     addSender q = M.insert (senderId q) (recipientId q)
     addNotifier :: QueueRec -> Map NotifierId RecipientId -> Map NotifierId RecipientId

src/Simplex/Messaging/Server/Expiration.hs

@@ -10,8 +10,19 @@ data ExpirationConfig = ExpirationConfig
   { -- time after which the entity can be expired, seconds
     ttl :: Int64,
     -- interval to check expiration, seconds
-    checkInterval :: Int
+    checkInterval :: Int64
   }
 
 expireBeforeEpoch :: ExpirationConfig -> IO Int64
 expireBeforeEpoch ExpirationConfig {ttl} = subtract ttl . systemSeconds <$> liftIO getSystemTime
+
+showTTL :: Int64 -> String
+showTTL s
+  | s' /= 0 = show s <> " seconds"
+  | ms' /= 0 = show ms <> " minutes"
+  | hs' /= 0 = show hs <> " hours"
+  | otherwise = show ds <> " days"
+  where
+    (ms, s') = s `divMod` 60
+    (hs, ms') = ms `divMod` 60
+    (ds, hs') = hs `divMod` 24

src/Simplex/Messaging/Server/Main.hs

@@ -24,10 +24,11 @@ import Simplex.Messaging.Encoding.String
 import Simplex.Messaging.Protocol (BasicAuth (..), ProtoServerWithAuth (ProtoServerWithAuth), pattern SMPServer)
 import Simplex.Messaging.Server (runSMPServer)
 import Simplex.Messaging.Server.CLI
-import Simplex.Messaging.Server.Env.STM (ServerConfig (..), defaultInactiveClientExpiration, defaultMessageExpiration)
+import Simplex.Messaging.Server.Env.STM (ServerConfig (..), defaultInactiveClientExpiration, defaultMessageExpiration, defMsgExpirationDays)
 import Simplex.Messaging.Server.Expiration
 import Simplex.Messaging.Transport (simplexMQVersion, supportedSMPServerVRange)
 import Simplex.Messaging.Transport.Client (TransportHost (..))
+import Simplex.Messaging.Transport.Server (TransportServerConfig (..), defaultTransportServerConfig)
 import Simplex.Messaging.Util (safeDecodeUtf8)
 import System.Directory (createDirectoryIfMissing, doesFileExist)
 import System.FilePath (combine)
@@ -106,7 +107,8 @@ smpServerCLI cfgPath logPath =
                 <> ("enable: " <> onOff enableStoreLog <> "\n\n")
                 <> "# Undelivered messages are optionally saved and restored when the server restarts,\n\
                    \# they are preserved in the .bak file until the next restart.\n"
-                <> ("restore_messages: " <> onOff enableStoreLog <> "\n\n")
+                <> ("restore_messages: " <> onOff enableStoreLog <> "\n")
+                <> ("expire_messages_days: " <> show defMsgExpirationDays <> "\n\n")
                 <> "# Log daily server statistics to CSV file\n"
                 <> ("log_stats: " <> onOff logStats <> "\n\n")
                 <> "[AUTH]\n\
@@ -128,7 +130,8 @@ smpServerCLI cfgPath logPath =
                 <> ("host: " <> host <> "\n")
                 <> ("port: " <> defaultServerPort <> "\n")
                 <> "log_tls_errors: off\n\
-                   \websockets: off\n\n\
+                   \websockets: off\n\
+                   \# control_port: 5224\n\n\
                    \[INACTIVE_CLIENTS]\n\
                    \# TTL and interval to check inactive clients\n\
                    \disconnect: off\n"
@@ -140,10 +143,13 @@ smpServerCLI cfgPath logPath =
       fp <- checkSavedFingerprint cfgPath defaultX509Config
       let host = fromRight "<hostnames>" $ T.unpack <$> lookupValue "TRANSPORT" "host" ini
           port = T.unpack $ strictIni "TRANSPORT" "port" ini
-          cfg@ServerConfig {transports, storeLogFile, newQueueBasicAuth, inactiveClientExpiration} = serverConfig
+          cfg@ServerConfig {transports, storeLogFile, newQueueBasicAuth, messageExpiration, inactiveClientExpiration} = serverConfig
           srv = ProtoServerWithAuth (SMPServer [THDomainName host] (if port == "5223" then "" else port) (C.KeyHash fp)) newQueueBasicAuth
       printServiceInfo serverVersion srv
       printServerConfig transports storeLogFile
+      putStrLn $ case messageExpiration of
+        Just ExpirationConfig {ttl} -> "expiring messages after " <> showTTL ttl
+        _ -> "not expiring messages"
       putStrLn $ case inactiveClientExpiration of
         Just ExpirationConfig {ttl, checkInterval} -> "expiring clients inactive for " <> show ttl <> " seconds every " <> show checkInterval <> " seconds"
         _ -> "not expiring inactive clients"
@@ -160,8 +166,8 @@ smpServerCLI cfgPath logPath =
         serverConfig =
           ServerConfig
             { transports = iniTransports ini,
-              tbqSize = 32,
-              serverTbqSize = 128,
+              tbqSize = 64,
+              -- serverTbqSize = 1024,
               msgQueueQuota = 128,
               queueIdBytes = 24,
               msgIdBytes = 24, -- must be at least 24 bytes, it is used as 192-bit nonce for XSalsa20
@@ -179,7 +185,10 @@ smpServerCLI cfgPath logPath =
               -- allow creating new queues by default
               allowNewQueues = fromMaybe True $ iniOnOff "AUTH" "new_queues" ini,
               newQueueBasicAuth = either error id <$> strDecodeIni "AUTH" "create_password" ini,
-              messageExpiration = Just defaultMessageExpiration,
+              messageExpiration =
+                Just defaultMessageExpiration
+                  { ttl = 86400 * readIniDefault defMsgExpirationDays "STORE_LOG" "expire_messages_days" ini
+                  },
               inactiveClientExpiration =
                 settingIsOn "INACTIVE_CLIENTS" "disconnect" ini
                   $> ExpirationConfig
@@ -191,7 +200,11 @@ smpServerCLI cfgPath logPath =
               serverStatsLogFile = combine logPath "smp-server-stats.daily.log",
               serverStatsBackupFile = logStats $> combine logPath "smp-server-stats.log",
               smpServerVRange = supportedSMPServerVRange,
-              logTLSErrors = fromMaybe False $ iniOnOff "TRANSPORT" "log_tls_errors" ini
+              transportConfig =
+                defaultTransportServerConfig
+                  { logTLSErrors = fromMaybe False $ iniOnOff "TRANSPORT" "log_tls_errors" ini
+                  },
+              controlPort = either (const Nothing) (Just . T.unpack) $ lookupValue "TRANSPORT" "control_port" ini
             }
 
 data CliCommand

src/Simplex/Messaging/Server/MsgStore/STM.hs

@@ -13,6 +13,7 @@ module Simplex.Messaging.Server.MsgStore.STM
     getMsgQueue,
     delMsgQueue,
     flushMsgQueue,
+    snapshotMsgQueue,
     writeMsg,
     tryPeekMsg,
     peekMsg,
@@ -62,6 +63,14 @@ delMsgQueue st rId = TM.delete rId st
 flushMsgQueue :: STMMsgStore -> RecipientId -> STM [Message]
 flushMsgQueue st rId = TM.lookupDelete rId st >>= maybe (pure []) (flushTQueue . msgQueue)
 
+snapshotMsgQueue :: STMMsgStore -> RecipientId -> STM [Message]
+snapshotMsgQueue st rId  = TM.lookup rId st >>= maybe (pure []) (snapshotTQueue . msgQueue)
+  where
+    snapshotTQueue q = do
+      msgs <- flushTQueue q
+      mapM_ (writeTQueue q) msgs
+      pure msgs
+
 writeMsg :: MsgQueue -> Message -> STM (Maybe Message)
 writeMsg MsgQueue {msgQueue = q, quota, canWrite, size} msg = do
   canWrt <- readTVar canWrite

src/Simplex/Messaging/Server/Stats.hs

@@ -94,7 +94,7 @@ setServerStats s d = do
   writeTVar (msgRecvNtf s) $! _msgRecvNtf d
   setPeriodStats (activeQueuesNtf s) (_activeQueuesNtf d)
   writeTVar (qCount s) $! _qCount d
-  writeTVar (msgCount s) $! _qCount d
+  writeTVar (msgCount s) $! _msgCount d
 
 instance StrEncoding ServerStatsData where
   strEncode ServerStatsData {_fromTime, _qCreated, _qSecured, _qDeleted, _msgSent, _msgRecv, _msgSentNtf, _msgRecvNtf, _activeQueues, _activeQueuesNtf} =

src/Simplex/Messaging/Server/StoreLog.hs

@@ -25,20 +25,17 @@ module Simplex.Messaging.Server.StoreLog
 where
 
 import Control.Applicative (optional, (<|>))
-import Control.Monad (unless)
-import Data.Bifunctor (first, second)
+import Control.Monad (foldM, unless, when)
 import Data.ByteString.Char8 (ByteString)
 import qualified Data.ByteString.Char8 as B
-import qualified Data.ByteString.Lazy.Char8 as LB
-import Data.Either (partitionEithers)
 import Data.Functor (($>))
-import Data.List (foldl')
 import Data.Map.Strict (Map)
 import qualified Data.Map.Strict as M
 import Simplex.Messaging.Encoding.String
 import Simplex.Messaging.Protocol
 import Simplex.Messaging.Server.QueueStore (NtfCreds (..), QueueRec (..), ServerQueueStatus (..))
 import Simplex.Messaging.Transport.Buffer (trimCR)
+import Simplex.Messaging.Util (ifM)
 import System.Directory (doesFileExist)
 import System.IO
 
@@ -139,37 +136,33 @@ logDeleteQueue s = writeStoreLogRecord s . DeleteQueue
 logDeleteNotifier :: StoreLog 'WriteMode -> QueueId -> IO ()
 logDeleteNotifier s = writeStoreLogRecord s . DeleteNotifier
 
-readWriteStoreLog :: StoreLog 'ReadMode -> IO (Map RecipientId QueueRec, StoreLog 'WriteMode)
-readWriteStoreLog s@(ReadStoreLog f _) = do
-  qs <- readQueues s
-  closeStoreLog s
-  s' <- openWriteStoreLog f
-  writeQueues s' qs
-  pure (qs, s')
+readWriteStoreLog :: FilePath -> IO (Map RecipientId QueueRec, StoreLog 'WriteMode)
+readWriteStoreLog f = do
+  qs <- ifM (doesFileExist f) (readQueues f) (pure M.empty)
+  s <- openWriteStoreLog f
+  writeQueues s qs
+  pure (qs, s)
 
 writeQueues :: StoreLog 'WriteMode -> Map RecipientId QueueRec -> IO ()
-writeQueues s = mapM_ (writeStoreLogRecord s . CreateQueue) . M.filter active
+writeQueues s = mapM_ $ \q -> when (active q) $ logCreateQueue s q
   where
     active QueueRec {status} = status == QueueActive
 
-type LogParsingError = (String, ByteString)
-
-readQueues :: StoreLog 'ReadMode -> IO (Map RecipientId QueueRec)
-readQueues (ReadStoreLog _ h) = LB.hGetContents h >>= returnResult . procStoreLog
+readQueues :: FilePath -> IO (Map RecipientId QueueRec)
+readQueues f = foldM processLine M.empty . B.lines =<< B.readFile f
   where
-    procStoreLog :: LB.ByteString -> ([LogParsingError], Map RecipientId QueueRec)
-    procStoreLog = second (foldl' procLogRecord M.empty) . partitionEithers . map parseLogRecord . LB.lines
-    returnResult :: ([LogParsingError], Map RecipientId QueueRec) -> IO (Map RecipientId QueueRec)
-    returnResult (errs, res) = mapM_ printError errs $> res
-    parseLogRecord :: LB.ByteString -> Either LogParsingError StoreLogRecord
-    parseLogRecord = (\s -> first (,s) $ strDecode s) . trimCR . LB.toStrict
-    procLogRecord :: Map RecipientId QueueRec -> StoreLogRecord -> Map RecipientId QueueRec
-    procLogRecord m = \case
-      CreateQueue q -> M.insert (recipientId q) q m
-      SecureQueue qId sKey -> M.adjust (\q -> q {senderKey = Just sKey}) qId m
-      AddNotifier qId ntfCreds -> M.adjust (\q -> q {notifier = Just ntfCreds}) qId m
-      SuspendQueue qId -> M.adjust (\q -> q {status = QueueOff}) qId m
-      DeleteQueue qId -> M.delete qId m
-      DeleteNotifier qId -> M.adjust (\q -> q {notifier = Nothing}) qId m
-    printError :: LogParsingError -> IO ()
-    printError (e, s) = B.putStrLn $ "Error parsing log: " <> B.pack e <> " - " <> s
+    processLine :: Map RecipientId QueueRec -> ByteString -> IO (Map RecipientId QueueRec)
+    processLine m s = case strDecode $ trimCR s of
+      Right r -> pure $ procLogRecord r
+      Left e -> printError e $> m
+      where
+        procLogRecord :: StoreLogRecord -> Map RecipientId QueueRec
+        procLogRecord = \case
+          CreateQueue q -> M.insert (recipientId q) q m
+          SecureQueue qId sKey -> M.adjust (\q -> q {senderKey = Just sKey}) qId m
+          AddNotifier qId ntfCreds -> M.adjust (\q -> q {notifier = Just ntfCreds}) qId m
+          SuspendQueue qId -> M.adjust (\q -> q {status = QueueOff}) qId m
+          DeleteQueue qId -> M.delete qId m
+          DeleteNotifier qId -> M.adjust (\q -> q {notifier = Nothing}) qId m
+        printError :: String -> IO ()
+        printError e = B.putStrLn $ "Error parsing log: " <> B.pack e <> " - " <> s

src/Simplex/Messaging/Transport.hs

@@ -29,6 +29,7 @@ module Simplex.Messaging.Transport
     supportedSMPServerVRange,
     simplexMQVersion,
     smpBlockSize,
+    TransportConfig (..),
 
     -- * Transport connection class
     Transport (..),
@@ -104,6 +105,11 @@ simplexMQVersion = showVersion SMQ.version
 
 -- * Transport connection class
 
+data TransportConfig = TransportConfig
+  { logTLSErrors :: Bool,
+    transportTimeout :: Maybe Int
+  }
+
 class Transport c where
   transport :: ATransport
   transport = ATransport (TProxy @c)
@@ -112,11 +118,13 @@ class Transport c where
 
   transportPeer :: c -> TransportPeer
 
+  transportConfig :: c -> TransportConfig
+
   -- | Upgrade server TLS context to connection (used in the server)
-  getServerConnection :: T.Context -> IO c
+  getServerConnection :: TransportConfig -> T.Context -> IO c
 
   -- | Upgrade client TLS context to connection (used in the client)
-  getClientConnection :: T.Context -> IO c
+  getClientConnection :: TransportConfig -> T.Context -> IO c
 
   -- | tls-unique channel binding per RFC5929
   tlsUnique :: c -> SessionId
@@ -150,24 +158,25 @@ data TLS = TLS
   { tlsContext :: T.Context,
     tlsPeer :: TransportPeer,
     tlsUniq :: ByteString,
-    tlsBuffer :: TBuffer
+    tlsBuffer :: TBuffer,
+    tlsTransportConfig :: TransportConfig
   }
 
-connectTLS :: T.TLSParams p => Maybe HostName -> Bool -> p -> Socket -> IO T.Context
-connectTLS host_ logErrors params sock =
+connectTLS :: T.TLSParams p => Maybe HostName -> TransportConfig -> p -> Socket -> IO T.Context
+connectTLS host_ TransportConfig {logTLSErrors} params sock =
   E.bracketOnError (T.contextNew sock params) closeTLS $ \ctx ->
     logHandshakeErrors (T.handshake ctx) $> ctx
   where
-    logHandshakeErrors = if logErrors then (`catchAll` logThrow) else id
+    logHandshakeErrors = if logTLSErrors then (`catchAll` logThrow) else id
     logThrow e = putStrLn ("TLS error" <> host <> ": " <> show e) >> E.throwIO e
     host = maybe "" (\h -> " (" <> h <> ")") host_
 
-getTLS :: TransportPeer -> T.Context -> IO TLS
-getTLS tlsPeer cxt = withTlsUnique tlsPeer cxt newTLS
+getTLS :: TransportPeer -> TransportConfig -> T.Context -> IO TLS
+getTLS tlsPeer cfg cxt = withTlsUnique tlsPeer cxt newTLS
   where
     newTLS tlsUniq = do
       tlsBuffer <- atomically newTBuffer
-      pure TLS {tlsContext = cxt, tlsPeer, tlsUniq, tlsBuffer}
+      pure TLS {tlsContext = cxt, tlsTransportConfig = cfg, tlsPeer, tlsUniq, tlsBuffer}
 
 withTlsUnique :: TransportPeer -> T.Context -> (ByteString -> IO c) -> IO c
 withTlsUnique peer cxt f =
@@ -199,19 +208,21 @@ supportedParameters =
 instance Transport TLS where
   transportName _ = "TLS"
   transportPeer = tlsPeer
+  transportConfig = tlsTransportConfig
   getServerConnection = getTLS TServer
   getClientConnection = getTLS TClient
   tlsUnique = tlsUniq
   closeConnection tls = closeTLS $ tlsContext tls
 
+  -- https://hackage.haskell.org/package/tls-1.6.0/docs/Network-TLS.html#v:recvData
+  -- this function may return less than requested number of bytes
   cGet :: TLS -> Int -> IO ByteString
-  cGet TLS {tlsContext, tlsBuffer} n = do
-    s <- getBuffered tlsBuffer n (T.recvData tlsContext)
-    -- https://hackage.haskell.org/package/tls-1.6.0/docs/Network-TLS.html#v:recvData
-    if B.length s == n then pure s else ioe_EOF
-
+  cGet TLS {tlsContext, tlsBuffer, tlsTransportConfig = TransportConfig {transportTimeout = t_}} n =
+    getBuffered tlsBuffer n t_ (T.recvData tlsContext)
+      
   cPut :: TLS -> ByteString -> IO ()
-  cPut tls = T.sendData (tlsContext tls) . BL.fromStrict
+  cPut TLS {tlsContext, tlsTransportConfig = TransportConfig {transportTimeout = t_}} s =
+    withTimedErr t_ . T.sendData tlsContext $ BL.fromStrict s
 
   getLn :: TLS -> IO ByteString
   getLn TLS {tlsContext, tlsBuffer} = do
@@ -321,10 +332,11 @@ tPutBlock THandle {connection = c, blockSize} block =
 
 -- | Receive block from SMP transport.
 tGetBlock :: Transport c => THandle c -> IO (Either TransportError ByteString)
-tGetBlock THandle {connection = c, blockSize} =
-  cGet c blockSize >>= \case
-    "" -> ioe_EOF
-    msg -> pure . first (const TELargeMsg) $ C.unPad msg
+tGetBlock THandle {connection = c, blockSize} = do
+  msg <- cGet c blockSize
+  if B.length msg == blockSize
+    then pure . first (const TELargeMsg) $ C.unPad msg
+    else ioe_EOF
 
 -- | Server SMP transport handshake.
 --

src/Simplex/Messaging/Transport/Buffer.hs

@@ -8,6 +8,8 @@ import Control.Concurrent.STM
 import qualified Control.Exception as E
 import Data.ByteString.Char8 (ByteString)
 import qualified Data.ByteString.Char8 as B
+import System.Timeout (timeout)
+import GHC.IO.Exception (ioException, IOException (..), IOErrorType (..))
 
 data TBuffer = TBuffer
   { buffer :: TVar ByteString,
@@ -26,20 +28,33 @@ withBufferLock TBuffer {getLock} =
     (atomically $ takeTMVar getLock)
     (atomically $ putTMVar getLock ())
 
-getBuffered :: TBuffer -> Int -> IO ByteString -> IO ByteString
-getBuffered tb@TBuffer {buffer} n getChunk = withBufferLock tb $ do
-  b <- readChunks =<< readTVarIO buffer
+getBuffered :: TBuffer -> Int -> Maybe Int -> IO ByteString -> IO ByteString
+getBuffered tb@TBuffer {buffer} n t_ getChunk = withBufferLock tb $ do
+  b <- readChunks True =<< readTVarIO buffer
   let (s, b') = B.splitAt n b
   atomically $ writeTVar buffer $! b'
+  -- This would prevent the need to pad auth tag in HTTP2
+  -- threadDelay 150
   pure s
   where
-    readChunks :: ByteString -> IO ByteString
-    readChunks b
+    readChunks :: Bool -> ByteString -> IO ByteString
+    readChunks firstChunk b
       | B.length b >= n = pure b
       | otherwise =
-        getChunk >>= \case
+        get >>= \case
           "" -> pure b
-          s -> readChunks $ b <> s
+          s -> readChunks False $ b <> s
+      where
+        get
+          | firstChunk = getChunk
+          | otherwise = withTimedErr t_ getChunk
+
+withTimedErr :: Maybe Int -> IO a -> IO a
+withTimedErr t_ a = case t_ of
+  Just t -> timeout t a >>= maybe err pure
+  Nothing -> a
+  where
+    err = ioException (IOError Nothing TimeExpired "" "get timeout" Nothing Nothing)
 
 -- This function is only used in test and needs to be improved before it can be used in production,
 -- it will never complete if TLS connection is closed before there is newline.

src/Simplex/Messaging/Transport/Client.hs

@@ -1,3 +1,4 @@
+{-# LANGUAGE DuplicateRecordFields #-}
 {-# LANGUAGE FlexibleInstances #-}
 {-# LANGUAGE LambdaCase #-}
 {-# LANGUAGE NamedFieldPuns #-}
@@ -20,19 +21,19 @@ module Simplex.Messaging.Transport.Client
 where
 
 import Control.Applicative (optional)
-import Control.Monad.Except
 import Control.Monad.IO.Unlift
 import Data.Aeson (FromJSON (..), ToJSON (..))
 import qualified Data.Attoparsec.ByteString.Char8 as A
 import Data.ByteString.Char8 (ByteString)
 import qualified Data.ByteString.Char8 as B
-import Data.Char (isAsciiLower, isDigit)
+import Data.Char (isAsciiLower, isDigit, isHexDigit)
 import Data.Default (def)
+import Data.IP
 import Data.List.NonEmpty (NonEmpty (..))
 import qualified Data.List.NonEmpty as L
 import Data.Maybe (fromMaybe)
 import Data.String
-import Data.Word (Word8)
+import Data.Word (Word32, Word8)
 import qualified Data.X509 as X
 import qualified Data.X509.CertificateStore as XS
 import Data.X509.Validation (Fingerprint (..))
@@ -55,6 +56,7 @@ import qualified UnliftIO.Exception as E
 
 data TransportHost
   = THIPv4 (Word8, Word8, Word8, Word8)
+  | THIPv6 (Word32, Word32, Word32, Word32)
   | THOnionHost ByteString
   | THDomainName HostName
   deriving (Eq, Ord, Show)
@@ -66,11 +68,13 @@ instance Encoding TransportHost where
 instance StrEncoding TransportHost where
   strEncode = \case
     THIPv4 (a1, a2, a3, a4) -> B.intercalate "." $ map bshow [a1, a2, a3, a4]
+    THIPv6 addr -> bshow $ toIPv6w addr
     THOnionHost host -> host
     THDomainName host -> B.pack host
   strP =
     A.choice
       [ THIPv4 <$> ((,,,) <$> ipNum <*> ipNum <*> ipNum <*> A.decimal),
+        maybe (Left "bad IPv6") (Right . THIPv6 . fromIPv6w) . readMaybe . B.unpack <$?> A.takeWhile1 (\c -> isHexDigit c || c == ':'),
         THOnionHost <$> ((<>) <$> A.takeWhile (\c -> isAsciiLower c || isDigit c) <*> A.string ".onion"),
         THDomainName . B.unpack <$> (notOnion <$?> A.takeWhile1 (A.notInClass ":#,;/ \n\r\t"))
       ]
@@ -110,12 +114,16 @@ data TransportClientConfig = TransportClientConfig
 defaultTransportClientConfig :: TransportClientConfig
 defaultTransportClientConfig = TransportClientConfig Nothing (Just defaultKeepAliveOpts) True
 
+clientTransportConfig :: TransportClientConfig -> TransportConfig
+clientTransportConfig TransportClientConfig {logTLSErrors} =
+  TransportConfig {logTLSErrors, transportTimeout = Nothing}
+
 -- | Connect to passed TCP host:port and pass handle to the client.
 runTransportClient :: (Transport c, MonadUnliftIO m) => TransportClientConfig -> Maybe ByteString -> TransportHost -> ServiceName -> Maybe C.KeyHash -> (c -> m a) -> m a
 runTransportClient = runTLSTransportClient supportedParameters Nothing
 
 runTLSTransportClient :: (Transport c, MonadUnliftIO m) => T.Supported -> Maybe XS.CertificateStore -> TransportClientConfig -> Maybe ByteString -> TransportHost -> ServiceName -> Maybe C.KeyHash -> (c -> m a) -> m a
-runTLSTransportClient tlsParams caStore_ TransportClientConfig {socksProxy, tcpKeepAlive, logTLSErrors} proxyUsername host port keyHash client = do
+runTLSTransportClient tlsParams caStore_ cfg@TransportClientConfig {socksProxy, tcpKeepAlive} proxyUsername host port keyHash client = do
   let hostName = B.unpack $ strEncode host
       clientParams = mkTLSClientParams tlsParams caStore_ hostName port keyHash
       connectTCP = case socksProxy of
@@ -124,11 +132,13 @@ runTLSTransportClient tlsParams caStore_ TransportClientConfig {socksProxy, tcpK
   c <- liftIO $ do
     sock <- connectTCP port
     mapM_ (setSocketKeepAlive sock) tcpKeepAlive
-    connectTLS (Just hostName) logTLSErrors clientParams sock >>= getClientConnection
+    let tCfg = clientTransportConfig cfg
+    connectTLS (Just hostName) tCfg clientParams sock >>= getClientConnection tCfg
   client c `E.finally` liftIO (closeConnection c)
   where
     hostAddr = \case
       THIPv4 addr -> SocksAddrIPV4 $ tupleToHostAddress addr
+      THIPv6 addr -> SocksAddrIPV6 addr
       THOnionHost h -> SocksAddrDomainName h
       THDomainName h -> SocksAddrDomainName $ B.pack h
 

src/Simplex/Messaging/Transport/HTTP2.hs

@@ -73,7 +73,7 @@ instance HTTP2BodyChunk HS.Request where
 getHTTP2Body :: HTTP2BodyChunk a => a -> Int -> IO HTTP2Body
 getHTTP2Body r n = do
   bodyBuffer <- atomically newTBuffer
-  let getPart n' = getBuffered bodyBuffer n' $ getBodyChunk r
+  let getPart n' = getBuffered bodyBuffer n' Nothing $ getBodyChunk r
   bodyHead <- getPart n
   let bodySize = fromMaybe 0 $ getBodySize r
       -- TODO check bodySize once it is set

src/Simplex/Messaging/Transport/HTTP2/Client.hs

@@ -9,7 +9,7 @@ module Simplex.Messaging.Transport.HTTP2.Client where
 import Control.Concurrent.Async
 import Control.Exception (IOException, try)
 import qualified Control.Exception as E
-import Control.Monad.Except
+import Control.Monad
 import Data.ByteString.Char8 (ByteString)
 import Data.Functor (($>))
 import Data.Time (UTCTime, getCurrentTime)

src/Simplex/Messaging/Transport/HTTP2/Server.hs

@@ -14,7 +14,7 @@ import qualified Network.TLS as T
 import Numeric.Natural (Natural)
 import Simplex.Messaging.Transport (SessionId)
 import Simplex.Messaging.Transport.HTTP2
-import Simplex.Messaging.Transport.Server (loadSupportedTLSServerParams, runTransportServer)
+import Simplex.Messaging.Transport.Server (TransportServerConfig (..), loadSupportedTLSServerParams, runTransportServer)
 
 type HTTP2ServerFunc = SessionId -> Request -> (Response -> IO ()) -> IO ()
 
@@ -27,7 +27,7 @@ data HTTP2ServerConfig = HTTP2ServerConfig
     caCertificateFile :: FilePath,
     privateKeyFile :: FilePath,
     certificateFile :: FilePath,
-    logTLSErrors :: Bool
+    transportConfig :: TransportServerConfig
   }
   deriving (Show)
 
@@ -45,12 +45,12 @@ data HTTP2Server = HTTP2Server
 
 -- This server is for testing only, it processes all requests in a single queue.
 getHTTP2Server :: HTTP2ServerConfig -> IO HTTP2Server
-getHTTP2Server HTTP2ServerConfig {qSize, http2Port, bufferSize, bodyHeadSize, serverSupported, caCertificateFile, certificateFile, privateKeyFile, logTLSErrors} = do
+getHTTP2Server HTTP2ServerConfig {qSize, http2Port, bufferSize, bodyHeadSize, serverSupported, caCertificateFile, certificateFile, privateKeyFile, transportConfig} = do
   tlsServerParams <- loadSupportedTLSServerParams serverSupported caCertificateFile certificateFile privateKeyFile
   started <- newEmptyTMVarIO
   reqQ <- newTBQueueIO qSize
   action <- async $
-    runHTTP2Server started http2Port bufferSize tlsServerParams logTLSErrors $ \sessionId r sendResponse -> do
+    runHTTP2Server started http2Port bufferSize tlsServerParams transportConfig $ \sessionId r sendResponse -> do
       reqBody <- getHTTP2Body r bodyHeadSize
       atomically $ writeTBQueue reqQ HTTP2Request {sessionId, request = r, reqBody, sendResponse}
   void . atomically $ takeTMVar started
@@ -59,8 +59,8 @@ getHTTP2Server HTTP2ServerConfig {qSize, http2Port, bufferSize, bodyHeadSize, se
 closeHTTP2Server :: HTTP2Server -> IO ()
 closeHTTP2Server = uninterruptibleCancel . action
 
-runHTTP2Server :: TMVar Bool -> ServiceName -> BufferSize -> T.ServerParams -> Bool -> HTTP2ServerFunc -> IO ()
-runHTTP2Server started port bufferSize serverParams logTLSErrors http2Server =
-  runTransportServer started port serverParams logTLSErrors $ withHTTP2 bufferSize run
+runHTTP2Server :: TMVar Bool -> ServiceName -> BufferSize -> T.ServerParams -> TransportServerConfig -> HTTP2ServerFunc -> IO ()
+runHTTP2Server started port bufferSize serverParams transportConfig http2Server =
+  runTransportServer started port serverParams transportConfig $ withHTTP2 bufferSize run
   where
     run cfg sessId = H.run cfg $ \req _aux sendResp -> http2Server sessId req (`sendResp` [])

src/Simplex/Messaging/Transport/Server.hs

@@ -1,10 +1,14 @@
 {-# LANGUAGE DuplicateRecordFields #-}
 {-# LANGUAGE LambdaCase #-}
+{-# LANGUAGE NamedFieldPuns #-}
+{-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE ScopedTypeVariables #-}
 
 module Simplex.Messaging.Transport.Server
   ( runTransportServer,
     runTCPServer,
+    TransportServerConfig (..),
+    defaultTransportServerConfig,
     loadSupportedTLSServerParams,
     loadTLSServerParams,
     loadFingerprint,
@@ -12,11 +16,14 @@ module Simplex.Messaging.Transport.Server
   )
 where
 
-import Control.Concurrent.STM (stateTVar)
-import Control.Monad.Except
+import Control.Applicative ((<|>))
+import Control.Logger.Simple
+import Control.Monad
 import Control.Monad.IO.Unlift
 import qualified Crypto.Store.X509 as SX
 import Data.Default (def)
+import Data.List (find)
+import Data.Maybe (fromJust)
 import qualified Data.X509 as X
 import Data.X509.Validation (Fingerprint (..))
 import qualified Data.X509.Validation as XV
@@ -25,22 +32,40 @@ import qualified Network.TLS as T
 import Simplex.Messaging.TMap (TMap)
 import qualified Simplex.Messaging.TMap as TM
 import Simplex.Messaging.Transport
-import Simplex.Messaging.Util (catchAll_)
+import Simplex.Messaging.Util (catchAll_, tshow)
 import System.Exit (exitFailure)
 import System.Mem.Weak (Weak, deRefWeak)
 import UnliftIO.Concurrent
 import qualified UnliftIO.Exception as E
 import UnliftIO.STM
 
+data TransportServerConfig = TransportServerConfig
+  { logTLSErrors :: Bool,
+    transportTimeout :: Int
+  }
+  deriving (Eq, Show)
+
+defaultTransportServerConfig :: TransportServerConfig
+defaultTransportServerConfig = TransportServerConfig
+  { logTLSErrors = True,
+    transportTimeout = 40000000
+  }
+
+serverTransportConfig :: TransportServerConfig -> TransportConfig
+serverTransportConfig TransportServerConfig {logTLSErrors} =
+  -- TransportConfig {logTLSErrors, transportTimeout = Just transportTimeout}
+  TransportConfig {logTLSErrors, transportTimeout = Nothing}
+
 -- | Run transport server (plain TCP or WebSockets) on passed TCP port and signal when server started and stopped via passed TMVar.
 --
 -- All accepted connections are passed to the passed function.
-runTransportServer :: forall c m. (Transport c, MonadUnliftIO m) => TMVar Bool -> ServiceName -> T.ServerParams -> Bool -> (c -> m ()) -> m ()
-runTransportServer started port serverParams logTLSErrors server = do
+runTransportServer :: forall c m. (Transport c, MonadUnliftIO m) => TMVar Bool -> ServiceName -> T.ServerParams -> TransportServerConfig -> (c -> m ()) -> m ()
+runTransportServer started port serverParams cfg server = do
   u <- askUnliftIO
+  let tCfg = serverTransportConfig cfg
   liftIO . runTCPServer started port $ \conn ->
     E.bracket
-      (connectTLS Nothing logTLSErrors serverParams conn >>= getServerConnection)
+      (connectTLS Nothing tCfg serverParams conn >>= getServerConnection tCfg)
       closeConnection
       (unliftIO u . server)
 
@@ -70,14 +95,18 @@ startTCPServer started port = withSocketsDo $ resolve >>= open >>= setStarted
   where
     resolve =
       let hints = defaultHints {addrFlags = [AI_PASSIVE], addrSocketType = Stream}
-       in head <$> getAddrInfo (Just hints) Nothing (Just port)
+       in select <$> getAddrInfo (Just hints) Nothing (Just port)
+    select as = fromJust $ family AF_INET6 <|> family AF_INET
+      where
+        family f = find ((== f) . addrFamily) as
     open addr = do
       sock <- socket (addrFamily addr) (addrSocketType addr) (addrProtocol addr)
       setSocketOption sock ReuseAddr 1
       withFdSocket sock setCloseOnExecIfNeeded
+      logInfo $ "binding to " <> tshow (addrAddress addr)
       bind sock $ addrAddress addr
       listen sock 1024
-      return sock
+      pure sock
     setStarted sock = atomically (tryPutTMVar started True) >> pure sock
 
 loadTLSServerParams :: FilePath -> FilePath -> FilePath -> IO T.ServerParams

src/Simplex/Messaging/Transport/WebSockets.hs

@@ -17,6 +17,7 @@ import Simplex.Messaging.Transport
     Transport (..),
     TransportError (..),
     TransportPeer (..),
+    TransportConfig (..),
     closeTLS,
     smpBlockSize,
     withTlsUnique,
@@ -27,7 +28,8 @@ data WS = WS
   { wsPeer :: TransportPeer,
     tlsUniq :: ByteString,
     wsStream :: Stream,
-    wsConnection :: Connection
+    wsConnection :: Connection,
+    wsTransportConfig :: TransportConfig
   }
 
 websocketsOpts :: ConnectionOptions
@@ -45,10 +47,13 @@ instance Transport WS where
   transportPeer :: WS -> TransportPeer
   transportPeer = wsPeer
 
-  getServerConnection :: T.Context -> IO WS
+  transportConfig :: WS -> TransportConfig
+  transportConfig = wsTransportConfig
+
+  getServerConnection :: TransportConfig -> T.Context -> IO WS
   getServerConnection = getWS TServer
 
-  getClientConnection :: T.Context -> IO WS
+  getClientConnection :: TransportConfig -> T.Context -> IO WS
   getClientConnection = getWS TClient
 
   tlsUnique :: WS -> ByteString
@@ -74,13 +79,13 @@ instance Transport WS where
       then E.throwIO TEBadBlock
       else pure $ B.init s
 
-getWS :: TransportPeer -> T.Context -> IO WS
-getWS wsPeer cxt = withTlsUnique wsPeer cxt connectWS
+getWS :: TransportPeer -> TransportConfig -> T.Context -> IO WS
+getWS wsPeer cfg cxt = withTlsUnique wsPeer cxt connectWS
   where
     connectWS tlsUniq = do
       s <- makeTLSContextStream cxt
       wsConnection <- connectPeer wsPeer s
-      pure $ WS {wsPeer, tlsUniq, wsStream = s, wsConnection}
+      pure $ WS {wsPeer, tlsUniq, wsStream = s, wsConnection, wsTransportConfig = cfg}
     connectPeer :: TransportPeer -> Stream -> IO Connection
     connectPeer TServer = acceptClientRequest
     connectPeer TClient = sendClientRequest