diff --git a/packages/simplex-chat-nodejs/README.md b/packages/simplex-chat-nodejs/README.md
index ba5a758e0f..e3363df789 100644
--- a/packages/simplex-chat-nodejs/README.md
+++ b/packages/simplex-chat-nodejs/README.md
@@ -26,7 +26,7 @@ Simple bot that replies with squares of numbers you send to it:
   // const {bot} = await import("../dist/index.js")
   const [chat, _user, _address] = await bot.run({
     profile: {displayName: "Squaring bot example", fullName: ""},
-    dbOpts: {dbFilePrefix: "./squaring_bot", dbKey: ""},
+    dbOpts: {type: "sqlite", filePrefix: "./squaring_bot"},
     options: {
       addressSettings: {welcomeMessage: "Send a number, I will square it.",
     },
@@ -82,11 +82,23 @@ simplex_backend=postgres
 - PostgreSQL backend is only available for Linux x86_64
 - A PostgreSQL server accessible via connection string
 
-### API difference
+### Passing PostgreSQL connection
 
-With the PostgreSQL backend, `chatMigrateInit` arguments change meaning:
-- First argument: schema prefix (instead of DB file prefix)
-- Second argument: connection string (instead of encryption key)
+The `DbConfig` type is a discriminated union — pick the variant that matches
+the backend you installed:
+
+```ts
+// SQLite (default)
+dbOpts: {type: "sqlite", filePrefix: "./data/bot"}
+// optional: encryptionKey: "<sqlcipher-key>"
+
+// PostgreSQL
+dbOpts: {
+  type: "postgres",
+  connectionString: "postgres://user:pass@host/db",
+  // schemaPrefix: "bot",  // optional — defaults to "simplex_v1"
+}
+```
 
 ## Documentation
 
diff --git a/packages/simplex-chat-nodejs/docs/Namespace.api.md b/packages/simplex-chat-nodejs/docs/Namespace.api.md
index a1b3d2ca5a..5771b8450e 100644
--- a/packages/simplex-chat-nodejs/docs/Namespace.api.md
+++ b/packages/simplex-chat-nodejs/docs/Namespace.api.md
@@ -24,6 +24,7 @@ You need to use it in bot event handlers, and for any other use cases.
 
 ## Type Aliases
 
+- [DbConfig](api.TypeAlias.DbConfig.md)
 - [EventSubscriberFunc](api.TypeAlias.EventSubscriberFunc.md)
 - [EventSubscribers](api.TypeAlias.EventSubscribers.md)
 
diff --git a/packages/simplex-chat-nodejs/docs/Namespace.bot.md b/packages/simplex-chat-nodejs/docs/Namespace.bot.md
index 447b0b6f68..4b9171d0f7 100644
--- a/packages/simplex-chat-nodejs/docs/Namespace.bot.md
+++ b/packages/simplex-chat-nodejs/docs/Namespace.bot.md
@@ -12,9 +12,12 @@ It automates creating and updating of the bot profile, address and bot commands
 ## Interfaces
 
 - [BotConfig](bot.Interface.BotConfig.md)
-- [BotDbOpts](bot.Interface.BotDbOpts.md)
 - [BotOptions](bot.Interface.BotOptions.md)
 
+## Type Aliases
+
+- [BotDbOpts](bot.TypeAlias.BotDbOpts.md)
+
 ## Functions
 
 - [run](bot.Function.run.md)
diff --git a/packages/simplex-chat-nodejs/docs/api.Class.ChatApi.md b/packages/simplex-chat-nodejs/docs/api.Class.ChatApi.md
index 6812740aa2..b81677b976 100644
--- a/packages/simplex-chat-nodejs/docs/api.Class.ChatApi.md
+++ b/packages/simplex-chat-nodejs/docs/api.Class.ChatApi.md
@@ -6,7 +6,7 @@
 
 # Class: ChatApi
 
-Defined in: [src/api.ts:62](../src/api.ts#L62)
+Defined in: [src/api.ts:97](../src/api.ts#L97)
 
 Main API class for interacting with the chat core library.
 
@@ -16,7 +16,7 @@ Main API class for interacting with the chat core library.
 
 > `protected` **ctrl\_**: `bigint` \| `undefined`
 
-Defined in: [src/api.ts:68](../src/api.ts#L68)
+Defined in: [src/api.ts:103](../src/api.ts#L103)
 
 ## Accessors
 
@@ -26,7 +26,7 @@ Defined in: [src/api.ts:68](../src/api.ts#L68)
 
 > **get** **ctrl**(): `bigint`
 
-Defined in: [src/api.ts:295](../src/api.ts#L295)
+Defined in: [src/api.ts:329](../src/api.ts#L329)
 
 Chat controller reference
 
@@ -42,7 +42,7 @@ Chat controller reference
 
 > **get** **initialized**(): `boolean`
 
-Defined in: [src/api.ts:281](../src/api.ts#L281)
+Defined in: [src/api.ts:315](../src/api.ts#L315)
 
 Chat controller is initialized
 
@@ -58,7 +58,7 @@ Chat controller is initialized
 
 > **get** **started**(): `boolean`
 
-Defined in: [src/api.ts:288](../src/api.ts#L288)
+Defined in: [src/api.ts:322](../src/api.ts#L322)
 
 Chat controller is started
 
@@ -72,7 +72,7 @@ Chat controller is started
 
 > **apiAcceptContactRequest**(`contactReqId`): `Promise`\<`Contact`\>
 
-Defined in: [src/api.ts:697](../src/api.ts#L697)
+Defined in: [src/api.ts:731](../src/api.ts#L731)
 
 Accept contact request.
 Network usage: interactive.
@@ -93,7 +93,7 @@ Network usage: interactive.
 
 > **apiAcceptMember**(`groupId`, `groupMemberId`, `memberRole`): `Promise`\<`GroupMember`\>
 
-Defined in: [src/api.ts:517](../src/api.ts#L517)
+Defined in: [src/api.ts:551](../src/api.ts#L551)
 
 Accept group member. Requires Admin role.
 Network usage: background.
@@ -122,7 +122,7 @@ Network usage: background.
 
 > **apiAddMember**(`groupId`, `contactId`, `memberRole`): `Promise`\<`GroupMember`\>
 
-Defined in: [src/api.ts:497](../src/api.ts#L497)
+Defined in: [src/api.ts:531](../src/api.ts#L531)
 
 Add contact to group. Requires bot to have Admin role.
 Network usage: interactive.
@@ -151,7 +151,7 @@ Network usage: interactive.
 
 > **apiBlockMembersForAll**(`groupId`, `groupMemberIds`, `blocked`): `Promise`\<`void`\>
 
-Defined in: [src/api.ts:537](../src/api.ts#L537)
+Defined in: [src/api.ts:571](../src/api.ts#L571)
 
 Block members. Requires Moderator role.
 Network usage: background.
@@ -180,7 +180,7 @@ Network usage: background.
 
 > **apiCancelFile**(`fileId`): `Promise`\<`void`\>
 
-Defined in: [src/api.ts:487](../src/api.ts#L487)
+Defined in: [src/api.ts:521](../src/api.ts#L521)
 
 Cancel file.
 Network usage: background.
@@ -201,7 +201,7 @@ Network usage: background.
 
 > **apiChatItemReaction**(`chatType`, `chatId`, `chatItemId`, `add`, `reaction`): `Promise`\<`ChatItemDeletion`[]\>
 
-Defined in: [src/api.ts:461](../src/api.ts#L461)
+Defined in: [src/api.ts:495](../src/api.ts#L495)
 
 Add/remove message reaction.
 Network usage: background.
@@ -238,7 +238,7 @@ Network usage: background.
 
 > **apiConnect**(`userId`, `incognito`, `preparedLink?`): `Promise`\<[`ConnReqType`](api.Enumeration.ConnReqType.md)\>
 
-Defined in: [src/api.ts:666](../src/api.ts#L666)
+Defined in: [src/api.ts:700](../src/api.ts#L700)
 
 Connect via prepared SimpleX link. The link can be 1-time invitation link, contact address or group link
 Network usage: interactive.
@@ -267,7 +267,7 @@ Network usage: interactive.
 
 > **apiConnectActiveUser**(`connLink`): `Promise`\<[`ConnReqType`](api.Enumeration.ConnReqType.md)\>
 
-Defined in: [src/api.ts:675](../src/api.ts#L675)
+Defined in: [src/api.ts:709](../src/api.ts#L709)
 
 Connect via SimpleX link as string in the active user profile.
 Network usage: interactive.
@@ -288,7 +288,7 @@ Network usage: interactive.
 
 > **apiConnectPlan**(`userId`, `connectionLink`): `Promise`\<\[`ConnectionPlan`, `CreatedConnLink`\]\>
 
-Defined in: [src/api.ts:656](../src/api.ts#L656)
+Defined in: [src/api.ts:690](../src/api.ts#L690)
 
 Determine SimpleX link type and if the bot is already connected via this link.
 Network usage: interactive.
@@ -313,7 +313,7 @@ Network usage: interactive.
 
 > **apiCreateActiveUser**(`profile?`): `Promise`\<`User`\>
 
-Defined in: [src/api.ts:774](../src/api.ts#L774)
+Defined in: [src/api.ts:849](../src/api.ts#L849)
 
 Create new user profile
 Network usage: no.
@@ -334,7 +334,7 @@ Network usage: no.
 
 > **apiCreateGroupLink**(`groupId`, `memberRole`): `Promise`\<`string`\>
 
-Defined in: [src/api.ts:597](../src/api.ts#L597)
+Defined in: [src/api.ts:631](../src/api.ts#L631)
 
 Create group link.
 Network usage: interactive.
@@ -359,7 +359,7 @@ Network usage: interactive.
 
 > **apiCreateLink**(`userId`): `Promise`\<`string`\>
 
-Defined in: [src/api.ts:643](../src/api.ts#L643)
+Defined in: [src/api.ts:677](../src/api.ts#L677)
 
 Create 1-time invitation link.
 Network usage: interactive.
@@ -376,11 +376,37 @@ Network usage: interactive.
 
 ***
 
+### apiCreateMemberContact()
+
+> **apiCreateMemberContact**(`groupId`, `groupMemberId`): `Promise`\<`Contact`\>
+
+Defined in: [src/api.ts:915](../src/api.ts#L915)
+
+Create a direct message contact with a group member.
+Returns the created contact.
+Network usage: interactive.
+
+#### Parameters
+
+##### groupId
+
+`number`
+
+##### groupMemberId
+
+`number`
+
+#### Returns
+
+`Promise`\<`Contact`\>
+
+***
+
 ### apiCreateUserAddress()
 
 > **apiCreateUserAddress**(`userId`): `Promise`\<`CreatedConnLink`\>
 
-Defined in: [src/api.ts:312](../src/api.ts#L312)
+Defined in: [src/api.ts:346](../src/api.ts#L346)
 
 Create bot address.
 Network usage: interactive.
@@ -399,9 +425,9 @@ Network usage: interactive.
 
 ### apiDeleteChat()
 
-> **apiDeleteChat**(`chatType`, `chatId`, `deleteMode`): `Promise`\<`void`\>
+> **apiDeleteChat**(`chatType`, `chatId`, `deleteMode?`): `Promise`\<`void`\>
 
-Defined in: [src/api.ts:737](../src/api.ts#L737)
+Defined in: [src/api.ts:771](../src/api.ts#L771)
 
 Delete chat.
 Network usage: background.
@@ -416,7 +442,7 @@ Network usage: background.
 
 `number`
 
-##### deleteMode
+##### deleteMode?
 
 `ChatDeleteMode` = `...`
 
@@ -430,7 +456,7 @@ Network usage: background.
 
 > **apiDeleteChatItems**(`chatType`, `chatId`, `chatItemIds`, `deleteMode`): `Promise`\<`ChatItemDeletion`[]\>
 
-Defined in: [src/api.ts:436](../src/api.ts#L436)
+Defined in: [src/api.ts:470](../src/api.ts#L470)
 
 Delete message.
 Network usage: background.
@@ -463,7 +489,7 @@ Network usage: background.
 
 > **apiDeleteGroupLink**(`groupId`): `Promise`\<`void`\>
 
-Defined in: [src/api.ts:619](../src/api.ts#L619)
+Defined in: [src/api.ts:653](../src/api.ts#L653)
 
 Delete group link.
 Network usage: background.
@@ -484,7 +510,7 @@ Network usage: background.
 
 > **apiDeleteMemberChatItem**(`groupId`, `chatItemIds`): `Promise`\<`ChatItemDeletion`[]\>
 
-Defined in: [src/api.ts:451](../src/api.ts#L451)
+Defined in: [src/api.ts:485](../src/api.ts#L485)
 
 Moderate message. Requires Moderator role (and higher than message author's).
 Network usage: background.
@@ -509,7 +535,7 @@ Network usage: background.
 
 > **apiDeleteUser**(`userId`, `delSMPQueues`, `viewPwd?`): `Promise`\<`void`\>
 
-Defined in: [src/api.ts:804](../src/api.ts#L804)
+Defined in: [src/api.ts:879](../src/api.ts#L879)
 
 Delete user profile.
 Network usage: background.
@@ -538,7 +564,7 @@ Network usage: background.
 
 > **apiDeleteUserAddress**(`userId`): `Promise`\<`void`\>
 
-Defined in: [src/api.ts:322](../src/api.ts#L322)
+Defined in: [src/api.ts:356](../src/api.ts#L356)
 
 Deletes a user address.
 Network usage: background.
@@ -559,7 +585,7 @@ Network usage: background.
 
 > **apiGetActiveUser**(): `Promise`\<`User` \| `undefined`\>
 
-Defined in: [src/api.ts:754](../src/api.ts#L754)
+Defined in: [src/api.ts:829](../src/api.ts#L829)
 
 Get active user profile
 Network usage: no.
@@ -570,11 +596,40 @@ Network usage: no.
 
 ***
 
+### apiGetChat()
+
+> **apiGetChat**(`chatType`, `chatId`, `count`): `Promise`\<`any`\>
+
+Defined in: [src/api.ts:819](../src/api.ts#L819)
+
+Get chat items.
+Network usage: no.
+
+#### Parameters
+
+##### chatType
+
+`ChatType`
+
+##### chatId
+
+`number`
+
+##### count
+
+`number`
+
+#### Returns
+
+`Promise`\<`any`\>
+
+***
+
 ### apiGetGroupLink()
 
 > **apiGetGroupLink**(`groupId`): `Promise`\<`GroupLink`\>
 
-Defined in: [src/api.ts:628](../src/api.ts#L628)
+Defined in: [src/api.ts:662](../src/api.ts#L662)
 
 Get group link.
 Network usage: no.
@@ -595,7 +650,7 @@ Network usage: no.
 
 > **apiGetGroupLinkStr**(`groupId`): `Promise`\<`string`\>
 
-Defined in: [src/api.ts:634](../src/api.ts#L634)
+Defined in: [src/api.ts:668](../src/api.ts#L668)
 
 #### Parameters
 
@@ -613,7 +668,7 @@ Defined in: [src/api.ts:634](../src/api.ts#L634)
 
 > **apiGetUserAddress**(`userId`): `Promise`\<`UserContactLink` \| `undefined`\>
 
-Defined in: [src/api.ts:332](../src/api.ts#L332)
+Defined in: [src/api.ts:366](../src/api.ts#L366)
 
 Get bot address and settings.
 Network usage: no.
@@ -634,7 +689,7 @@ Network usage: no.
 
 > **apiJoinGroup**(`groupId`): `Promise`\<`GroupInfo`\>
 
-Defined in: [src/api.ts:507](../src/api.ts#L507)
+Defined in: [src/api.ts:541](../src/api.ts#L541)
 
 Join group.
 Network usage: interactive.
@@ -655,7 +710,7 @@ Network usage: interactive.
 
 > **apiLeaveGroup**(`groupId`): `Promise`\<`GroupInfo`\>
 
-Defined in: [src/api.ts:557](../src/api.ts#L557)
+Defined in: [src/api.ts:591](../src/api.ts#L591)
 
 Leave group.
 Network usage: background.
@@ -676,7 +731,7 @@ Network usage: background.
 
 > **apiListContacts**(`userId`): `Promise`\<`Contact`[]\>
 
-Defined in: [src/api.ts:717](../src/api.ts#L717)
+Defined in: [src/api.ts:751](../src/api.ts#L751)
 
 Get contacts.
 Network usage: no.
@@ -697,7 +752,7 @@ Network usage: no.
 
 > **apiListGroups**(`userId`, `contactId?`, `search?`): `Promise`\<`GroupInfo`[]\>
 
-Defined in: [src/api.ts:727](../src/api.ts#L727)
+Defined in: [src/api.ts:761](../src/api.ts#L761)
 
 Get groups.
 Network usage: no.
@@ -726,7 +781,7 @@ Network usage: no.
 
 > **apiListMembers**(`groupId`): `Promise`\<`GroupMember`[]\>
 
-Defined in: [src/api.ts:567](../src/api.ts#L567)
+Defined in: [src/api.ts:601](../src/api.ts#L601)
 
 Get group members.
 Network usage: no.
@@ -747,7 +802,7 @@ Network usage: no.
 
 > **apiListUsers**(): `Promise`\<`UserInfo`[]\>
 
-Defined in: [src/api.ts:784](../src/api.ts#L784)
+Defined in: [src/api.ts:859](../src/api.ts#L859)
 
 Get all user profiles
 Network usage: no.
@@ -762,7 +817,7 @@ Network usage: no.
 
 > **apiNewGroup**(`userId`, `groupProfile`): `Promise`\<`GroupInfo`\>
 
-Defined in: [src/api.ts:577](../src/api.ts#L577)
+Defined in: [src/api.ts:611](../src/api.ts#L611)
 
 Create group.
 Network usage: no.
@@ -787,7 +842,7 @@ Network usage: no.
 
 > **apiReceiveFile**(`fileId`): `Promise`\<`AChatItem`\>
 
-Defined in: [src/api.ts:477](../src/api.ts#L477)
+Defined in: [src/api.ts:511](../src/api.ts#L511)
 
 Receive file.
 Network usage: no.
@@ -808,7 +863,7 @@ Network usage: no.
 
 > **apiRejectContactRequest**(`contactReqId`): `Promise`\<`void`\>
 
-Defined in: [src/api.ts:707](../src/api.ts#L707)
+Defined in: [src/api.ts:741](../src/api.ts#L741)
 
 Reject contact request. The user who sent the request is **not notified**.
 Network usage: no.
@@ -827,9 +882,9 @@ Network usage: no.
 
 ### apiRemoveMembers()
 
-> **apiRemoveMembers**(`groupId`, `memberIds`, `withMessages`): `Promise`\<`GroupMember`[]\>
+> **apiRemoveMembers**(`groupId`, `memberIds`, `withMessages?`): `Promise`\<`GroupMember`[]\>
 
-Defined in: [src/api.ts:547](../src/api.ts#L547)
+Defined in: [src/api.ts:581](../src/api.ts#L581)
 
 Remove members. Requires Admin role.
 Network usage: background.
@@ -844,7 +899,7 @@ Network usage: background.
 
 `number`[]
 
-##### withMessages
+##### withMessages?
 
 `boolean` = `false`
 
@@ -854,11 +909,37 @@ Network usage: background.
 
 ***
 
+### apiSendMemberContactInvitation()
+
+> **apiSendMemberContactInvitation**(`contactId`, `message?`): `Promise`\<`Contact`\>
+
+Defined in: [src/api.ts:926](../src/api.ts#L926)
+
+Send a direct message invitation to a group member contact.
+The contact must have been created with [apiCreateMemberContact](#apicreatemembercontact).
+Network usage: interactive.
+
+#### Parameters
+
+##### contactId
+
+`number`
+
+##### message?
+
+`string` \| `MsgContent`
+
+#### Returns
+
+`Promise`\<`Contact`\>
+
+***
+
 ### apiSendMessages()
 
-> **apiSendMessages**(`chat`, `messages`, `liveMessage`): `Promise`\<`AChatItem`[]\>
+> **apiSendMessages**(`chat`, `messages`, `liveMessage?`): `Promise`\<`AChatItem`[]\>
 
-Defined in: [src/api.ts:381](../src/api.ts#L381)
+Defined in: [src/api.ts:415](../src/api.ts#L415)
 
 Send messages.
 Network usage: background.
@@ -867,13 +948,13 @@ Network usage: background.
 
 ##### chat
 
-`ChatInfo` | `ChatRef` | \[`ChatType`, `number`\]
+`ChatInfo` \| `ChatRef` \| \[`ChatType`, `number`\]
 
 ##### messages
 
 `ComposedMessage`[]
 
-##### liveMessage
+##### liveMessage?
 
 `boolean` = `false`
 
@@ -887,7 +968,7 @@ Network usage: background.
 
 > **apiSendTextMessage**(`chat`, `text`, `inReplyTo?`): `Promise`\<`AChatItem`[]\>
 
-Defined in: [src/api.ts:403](../src/api.ts#L403)
+Defined in: [src/api.ts:437](../src/api.ts#L437)
 
 Send text message.
 Network usage: background.
@@ -896,7 +977,7 @@ Network usage: background.
 
 ##### chat
 
-`ChatInfo` | `ChatRef` | \[`ChatType`, `number`\]
+`ChatInfo` \| `ChatRef` \| \[`ChatType`, `number`\]
 
 ##### text
 
@@ -916,7 +997,7 @@ Network usage: background.
 
 > **apiSendTextReply**(`chatItem`, `text`): `Promise`\<`AChatItem`[]\>
 
-Defined in: [src/api.ts:411](../src/api.ts#L411)
+Defined in: [src/api.ts:445](../src/api.ts#L445)
 
 Send text message in reply to received message.
 Network usage: background.
@@ -941,7 +1022,7 @@ Network usage: background.
 
 > **apiSetActiveUser**(`userId`, `viewPwd?`): `Promise`\<`User`\>
 
-Defined in: [src/api.ts:794](../src/api.ts#L794)
+Defined in: [src/api.ts:869](../src/api.ts#L869)
 
 Set active user profile
 Network usage: no.
@@ -966,7 +1047,7 @@ Network usage: no.
 
 > **apiSetAddressSettings**(`userId`, `__namedParameters`): `Promise`\<`void`\>
 
-Defined in: [src/api.ts:364](../src/api.ts#L364)
+Defined in: [src/api.ts:398](../src/api.ts#L398)
 
 Set bot address settings.
 Network usage: interactive.
@@ -987,11 +1068,61 @@ Network usage: interactive.
 
 ***
 
+### apiSetAutoAcceptMemberContacts()
+
+> **apiSetAutoAcceptMemberContacts**(`userId`, `onOff`): `Promise`\<`void`\>
+
+Defined in: [src/api.ts:808](../src/api.ts#L808)
+
+Set auto-accept member contacts.
+Network usage: no.
+
+#### Parameters
+
+##### userId
+
+`number`
+
+##### onOff
+
+`boolean`
+
+#### Returns
+
+`Promise`\<`void`\>
+
+***
+
+### apiSetContactCustomData()
+
+> **apiSetContactCustomData**(`contactId`, `customData?`): `Promise`\<`void`\>
+
+Defined in: [src/api.ts:798](../src/api.ts#L798)
+
+Set contact custom data.
+Network usage: no.
+
+#### Parameters
+
+##### contactId
+
+`number`
+
+##### customData?
+
+`object`
+
+#### Returns
+
+`Promise`\<`void`\>
+
+***
+
 ### apiSetContactPrefs()
 
 > **apiSetContactPrefs**(`contactId`, `preferences`): `Promise`\<`void`\>
 
-Defined in: [src/api.ts:830](../src/api.ts#L830)
+Defined in: [src/api.ts:905](../src/api.ts#L905)
 
 Configure chat preference overrides for the contact.
 Network usage: background.
@@ -1012,11 +1143,36 @@ Network usage: background.
 
 ***
 
+### apiSetGroupCustomData()
+
+> **apiSetGroupCustomData**(`groupId`, `customData?`): `Promise`\<`void`\>
+
+Defined in: [src/api.ts:788](../src/api.ts#L788)
+
+Set group custom data.
+Network usage: no.
+
+#### Parameters
+
+##### groupId
+
+`number`
+
+##### customData?
+
+`object`
+
+#### Returns
+
+`Promise`\<`void`\>
+
+***
+
 ### apiSetGroupLinkMemberRole()
 
 > **apiSetGroupLinkMemberRole**(`groupId`, `memberRole`): `Promise`\<`void`\>
 
-Defined in: [src/api.ts:610](../src/api.ts#L610)
+Defined in: [src/api.ts:644](../src/api.ts#L644)
 
 Set member role for group link.
 Network usage: no.
@@ -1041,7 +1197,7 @@ Network usage: no.
 
 > **apiSetMembersRole**(`groupId`, `groupMemberIds`, `memberRole`): `Promise`\<`void`\>
 
-Defined in: [src/api.ts:527](../src/api.ts#L527)
+Defined in: [src/api.ts:561](../src/api.ts#L561)
 
 Set members role. Requires Admin role.
 Network usage: background.
@@ -1070,7 +1226,7 @@ Network usage: background.
 
 > **apiSetProfileAddress**(`userId`, `enable`): `Promise`\<`UserProfileUpdateSummary`\>
 
-Defined in: [src/api.ts:350](../src/api.ts#L350)
+Defined in: [src/api.ts:384](../src/api.ts#L384)
 
 Add address to bot profile.
 Network usage: interactive.
@@ -1095,7 +1251,7 @@ Network usage: interactive.
 
 > **apiUpdateChatItem**(`chatType`, `chatId`, `chatItemId`, `msgContent`, `liveMessage`): `Promise`\<`ChatItem`\>
 
-Defined in: [src/api.ts:419](../src/api.ts#L419)
+Defined in: [src/api.ts:453](../src/api.ts#L453)
 
 Update message.
 Network usage: background.
@@ -1132,7 +1288,7 @@ Network usage: background.
 
 > **apiUpdateGroupProfile**(`groupId`, `groupProfile`): `Promise`\<`GroupInfo`\>
 
-Defined in: [src/api.ts:587](../src/api.ts#L587)
+Defined in: [src/api.ts:621](../src/api.ts#L621)
 
 Update group profile.
 Network usage: background.
@@ -1157,7 +1313,7 @@ Network usage: background.
 
 > **apiUpdateProfile**(`userId`, `profile`): `Promise`\<`UserProfileUpdateSummary` \| `undefined`\>
 
-Defined in: [src/api.ts:814](../src/api.ts#L814)
+Defined in: [src/api.ts:889](../src/api.ts#L889)
 
 Update user profile.
 Network usage: background.
@@ -1182,7 +1338,7 @@ Network usage: background.
 
 > **close**(): `Promise`\<`void`\>
 
-Defined in: [src/api.ts:114](../src/api.ts#L114)
+Defined in: [src/api.ts:148](../src/api.ts#L148)
 
 Close chat database.
 Usually doesn't need to be called in chat bots.
@@ -1195,9 +1351,9 @@ Usually doesn't need to be called in chat bots.
 
 ### off()
 
-> **off**\<`K`\>(`event`, `subscriber`): `void`
+> **off**\<`K`\>(`event`, `subscriber?`): `void`
 
-Defined in: [src/api.ts:253](../src/api.ts#L253)
+Defined in: [src/api.ts:287](../src/api.ts#L287)
 
 Unsubscribe all or a specific handler from a specific event.
 
@@ -1215,12 +1371,12 @@ Unsubscribe all or a specific handler from a specific event.
 
 The event type to unsubscribe from.
 
-##### subscriber
+##### subscriber?
+
+[`EventSubscriberFunc`](api.TypeAlias.EventSubscriberFunc.md)\<`K`\> \| `undefined`
 
 An optional subscriber function for the event.
 
-[`EventSubscriberFunc`](api.TypeAlias.EventSubscriberFunc.md)\<`K`\> | `undefined`
-
 #### Returns
 
 `void`
@@ -1229,20 +1385,20 @@ An optional subscriber function for the event.
 
 ### offAny()
 
-> **offAny**(`receiver`): `void`
+> **offAny**(`receiver?`): `void`
 
-Defined in: [src/api.ts:269](../src/api.ts#L269)
+Defined in: [src/api.ts:303](../src/api.ts#L303)
 
 Unsubscribe all or a specific handler from any events.
 
 #### Parameters
 
-##### receiver
+##### receiver?
+
+[`EventSubscriberFunc`](api.TypeAlias.EventSubscriberFunc.md)\<`Tag`\> \| `undefined`
 
 An optional subscriber function for the event.
 
-[`EventSubscriberFunc`](api.TypeAlias.EventSubscriberFunc.md)\<`Tag`\> | `undefined`
-
 #### Returns
 
 `void`
@@ -1255,7 +1411,7 @@ An optional subscriber function for the event.
 
 > **on**\<`K`\>(`subscribers`): `void`
 
-Defined in: [src/api.ts:163](../src/api.ts#L163)
+Defined in: [src/api.ts:197](../src/api.ts#L197)
 
 Subscribe multiple event handlers at once.
 
@@ -1285,7 +1441,7 @@ If the same function is subscribed to event.
 
 > **on**\<`K`\>(`event`, `subscriber`): `void`
 
-Defined in: [src/api.ts:171](../src/api.ts#L171)
+Defined in: [src/api.ts:205](../src/api.ts#L205)
 
 Subscribe a handler to a specific event.
 
@@ -1323,7 +1479,7 @@ If the same function is subscribed to event.
 
 > **onAny**(`receiver`): `void`
 
-Defined in: [src/api.ts:194](../src/api.ts#L194)
+Defined in: [src/api.ts:228](../src/api.ts#L228)
 
 Subscribe a handler to any event.
 
@@ -1349,7 +1505,7 @@ If the same function is subscribed to event.
 
 > **once**\<`K`\>(`event`, `subscriber`): `void`
 
-Defined in: [src/api.ts:205](../src/api.ts#L205)
+Defined in: [src/api.ts:239](../src/api.ts#L239)
 
 Subscribe a handler to a specific event to be delivered one time.
 
@@ -1385,13 +1541,13 @@ If the same function is subscribed to event.
 
 ### recvChatEvent()
 
-> **recvChatEvent**(`wait`): `Promise`\<`ChatEvent` \| `undefined`\>
+> **recvChatEvent**(`wait?`): `Promise`\<`ChatEvent` \| `undefined`\>
 
-Defined in: [src/api.ts:304](../src/api.ts#L304)
+Defined in: [src/api.ts:338](../src/api.ts#L338)
 
 #### Parameters
 
-##### wait
+##### wait?
 
 `number` = `5_000_000`
 
@@ -1405,7 +1561,7 @@ Defined in: [src/api.ts:304](../src/api.ts#L304)
 
 > **sendChatCmd**(`cmd`): `Promise`\<`ChatResponse`\>
 
-Defined in: [src/api.ts:300](../src/api.ts#L300)
+Defined in: [src/api.ts:334](../src/api.ts#L334)
 
 #### Parameters
 
@@ -1423,7 +1579,7 @@ Defined in: [src/api.ts:300](../src/api.ts#L300)
 
 > **startChat**(): `Promise`\<`void`\>
 
-Defined in: [src/api.ts:88](../src/api.ts#L88)
+Defined in: [src/api.ts:122](../src/api.ts#L122)
 
 Start chat controller. Must be called with the existing user profile.
 
@@ -1437,7 +1593,7 @@ Start chat controller. Must be called with the existing user profile.
 
 > **stopChat**(): `Promise`\<`void`\>
 
-Defined in: [src/api.ts:102](../src/api.ts#L102)
+Defined in: [src/api.ts:136](../src/api.ts#L136)
 
 Stop chat controller.
 Must be called before closing the database.
@@ -1453,9 +1609,9 @@ Usually doesn't need to be called in chat bots.
 
 #### Call Signature
 
-> **wait**\<`K`\>(`event`): `Promise`\<`ChatEvent` & \{ `type`: `K`; \}\>
+> **wait**\<`K`\>(`event`): `Promise`\<`ChatEvent` & `object`\>
 
-Defined in: [src/api.ts:213](../src/api.ts#L213)
+Defined in: [src/api.ts:247](../src/api.ts#L247)
 
 Waits for specific event, with an optional predicate.
 Returns `undefined` on timeout if specified.
@@ -1474,13 +1630,13 @@ Returns `undefined` on timeout if specified.
 
 ##### Returns
 
-`Promise`\<`ChatEvent` & \{ `type`: `K`; \}\>
+`Promise`\<`ChatEvent` & `object`\>
 
 #### Call Signature
 
-> **wait**\<`K`\>(`event`, `predicate`): `Promise`\<`ChatEvent` & \{ `type`: `K`; \}\>
+> **wait**\<`K`\>(`event`, `predicate`): `Promise`\<`ChatEvent` & `object`\>
 
-Defined in: [src/api.ts:214](../src/api.ts#L214)
+Defined in: [src/api.ts:248](../src/api.ts#L248)
 
 Waits for specific event, with an optional predicate.
 Returns `undefined` on timeout if specified.
@@ -1499,17 +1655,17 @@ Returns `undefined` on timeout if specified.
 
 ###### predicate
 
-(`event`) => `boolean` | `undefined`
+((`event`) => `boolean`) \| `undefined`
 
 ##### Returns
 
-`Promise`\<`ChatEvent` & \{ `type`: `K`; \}\>
+`Promise`\<`ChatEvent` & `object`\>
 
 #### Call Signature
 
 > **wait**\<`K`\>(`event`, `timeout`): `Promise`\<ChatEvent & \{ type: K; \} \| `undefined`\>
 
-Defined in: [src/api.ts:215](../src/api.ts#L215)
+Defined in: [src/api.ts:249](../src/api.ts#L249)
 
 Waits for specific event, with an optional predicate.
 Returns `undefined` on timeout if specified.
@@ -1538,7 +1694,7 @@ Returns `undefined` on timeout if specified.
 
 > **wait**\<`K`\>(`event`, `predicate`, `timeout`): `Promise`\<ChatEvent & \{ type: K; \} \| `undefined`\>
 
-Defined in: [src/api.ts:216](../src/api.ts#L216)
+Defined in: [src/api.ts:250](../src/api.ts#L250)
 
 Waits for specific event, with an optional predicate.
 Returns `undefined` on timeout if specified.
@@ -1557,7 +1713,7 @@ Returns `undefined` on timeout if specified.
 
 ###### predicate
 
-(`event`) => `boolean` | `undefined`
+((`event`) => `boolean`) \| `undefined`
 
 ###### timeout
 
@@ -1571,25 +1727,19 @@ Returns `undefined` on timeout if specified.
 
 ### init()
 
-> `static` **init**(`dbFilePrefix`, `dbKey?`, `confirm?`): `Promise`\<`ChatApi`\>
+> `static` **init**(`db`, `confirm?`): `Promise`\<`ChatApi`\>
 
-Defined in: [src/api.ts:76](../src/api.ts#L76)
+Defined in: [src/api.ts:110](../src/api.ts#L110)
 
 Initializes the ChatApi.
 
 #### Parameters
 
-##### dbFilePrefix
+##### db
 
-`string`
+[`DbConfig`](api.TypeAlias.DbConfig.md)
 
-File prefix for the database files.
-
-##### dbKey?
-
-`string` = `""`
-
-Database encryption key.
+Database configuration (sqlite or postgres).
 
 ##### confirm?
 
diff --git a/packages/simplex-chat-nodejs/docs/api.Class.ChatCommandError.md b/packages/simplex-chat-nodejs/docs/api.Class.ChatCommandError.md
index a4955cb3d9..5ec1d40540 100644
--- a/packages/simplex-chat-nodejs/docs/api.Class.ChatCommandError.md
+++ b/packages/simplex-chat-nodejs/docs/api.Class.ChatCommandError.md
@@ -74,7 +74,7 @@ Defined in: [src/api.ts:6](../src/api.ts#L6)
 
 ### stack?
 
-> `optional` **stack**: `string`
+> `optional` **stack?**: `string`
 
 Defined in: [node\_modules/typescript/lib/lib.es5.d.ts:1078](../node_modules/typescript/lib/lib.es5.d.ts#L1078)
 
diff --git a/packages/simplex-chat-nodejs/docs/api.Interface.BotAddressSettings.md b/packages/simplex-chat-nodejs/docs/api.Interface.BotAddressSettings.md
index efb4a75e81..23c5e35326 100644
--- a/packages/simplex-chat-nodejs/docs/api.Interface.BotAddressSettings.md
+++ b/packages/simplex-chat-nodejs/docs/api.Interface.BotAddressSettings.md
@@ -14,7 +14,7 @@ Bot address settings.
 
 ### autoAccept?
 
-> `optional` **autoAccept**: `boolean`
+> `optional` **autoAccept?**: `boolean`
 
 Defined in: [src/api.ts:28](../src/api.ts#L28)
 
@@ -30,7 +30,7 @@ true
 
 ### businessAddress?
 
-> `optional` **businessAddress**: `boolean`
+> `optional` **businessAddress?**: `boolean`
 
 Defined in: [src/api.ts:41](../src/api.ts#L41)
 
@@ -47,7 +47,7 @@ false
 
 ### welcomeMessage?
 
-> `optional` **welcomeMessage**: `string` \| `MsgContent`
+> `optional` **welcomeMessage?**: `string` \| `MsgContent`
 
 Defined in: [src/api.ts:34](../src/api.ts#L34)
 
diff --git a/packages/simplex-chat-nodejs/docs/api.TypeAlias.DbConfig.md b/packages/simplex-chat-nodejs/docs/api.TypeAlias.DbConfig.md
new file mode 100644
index 0000000000..7fe255327c
--- /dev/null
+++ b/packages/simplex-chat-nodejs/docs/api.TypeAlias.DbConfig.md
@@ -0,0 +1,64 @@
+[**simplex-chat**](README.md)
+
+***
+
+[simplex-chat](README.md) / [api](Namespace.api.md) / DbConfig
+
+# Type Alias: DbConfig
+
+> **DbConfig** = \{ `encryptionKey?`: `string`; `filePrefix`: `string`; `type`: `"sqlite"`; \} \| \{ `connectionString`: `string`; `schemaPrefix?`: `string`; `type`: `"postgres"`; \}
+
+Defined in: [src/api.ts:65](../src/api.ts#L65)
+
+Database configuration. The native library is built against exactly one
+backend (see `simplex_backend` / `SIMPLEX_BACKEND` at install time); this
+type makes the caller state which one they are targeting so field names
+can't lie about their meaning.
+
+## Union Members
+
+### Type Literal
+
+\{ `encryptionKey?`: `string`; `filePrefix`: `string`; `type`: `"sqlite"`; \}
+
+#### encryptionKey?
+
+> `optional` **encryptionKey?**: `string`
+
+Optional SQLCipher encryption key. Empty/omitted = unencrypted.
+
+#### filePrefix
+
+> **filePrefix**: `string`
+
+File prefix — two schema files are named `<prefix>_chat.db` and `<prefix>_agent.db`.
+
+#### type
+
+> **type**: `"sqlite"`
+
+SQLite backend (default).
+
+***
+
+### Type Literal
+
+\{ `connectionString`: `string`; `schemaPrefix?`: `string`; `type`: `"postgres"`; \}
+
+#### connectionString
+
+> **connectionString**: `string`
+
+PostgreSQL connection string (e.g. `postgres://user:pass@host/db`).
+
+#### schemaPrefix?
+
+> `optional` **schemaPrefix?**: `string`
+
+Schema prefix used to namespace tables. Defaults to `"simplex_v1"` when omitted.
+
+#### type
+
+> **type**: `"postgres"`
+
+PostgreSQL backend (Linux x86_64 only, libpq5 required).
diff --git a/packages/simplex-chat-nodejs/docs/api.TypeAlias.EventSubscriberFunc.md b/packages/simplex-chat-nodejs/docs/api.TypeAlias.EventSubscriberFunc.md
index 6197befc8a..bf40b3165c 100644
--- a/packages/simplex-chat-nodejs/docs/api.TypeAlias.EventSubscriberFunc.md
+++ b/packages/simplex-chat-nodejs/docs/api.TypeAlias.EventSubscriberFunc.md
@@ -4,7 +4,7 @@
 
 [simplex-chat](README.md) / [api](Namespace.api.md) / EventSubscriberFunc
 
-# Type Alias: EventSubscriberFunc()\<K\>
+# Type Alias: EventSubscriberFunc\<K\>
 
 > **EventSubscriberFunc**\<`K`\> = (`event`) => `void` \| `Promise`\<`void`\>
 
@@ -20,7 +20,7 @@ Defined in: [src/api.ts:50](../src/api.ts#L50)
 
 ### event
 
-`ChatEvent` & \{ `type`: `K`; \}
+`ChatEvent` & `object`
 
 ## Returns
 
diff --git a/packages/simplex-chat-nodejs/docs/bot.Function.run.md b/packages/simplex-chat-nodejs/docs/bot.Function.run.md
index bc31ad01a8..3c33e6c7d4 100644
--- a/packages/simplex-chat-nodejs/docs/bot.Function.run.md
+++ b/packages/simplex-chat-nodejs/docs/bot.Function.run.md
@@ -8,7 +8,7 @@
 
 > **run**(`__namedParameters`): `Promise`\<\[[`ChatApi`](api.Class.ChatApi.md), `User`, `UserContactLink` \| `undefined`\]\>
 
-Defined in: [src/bot.ts:49](../src/bot.ts#L49)
+Defined in: [src/bot.ts:47](../src/bot.ts#L47)
 
 ## Parameters
 
diff --git a/packages/simplex-chat-nodejs/docs/bot.Interface.BotConfig.md b/packages/simplex-chat-nodejs/docs/bot.Interface.BotConfig.md
index 0951c5a129..4624b1608b 100644
--- a/packages/simplex-chat-nodejs/docs/bot.Interface.BotConfig.md
+++ b/packages/simplex-chat-nodejs/docs/bot.Interface.BotConfig.md
@@ -6,43 +6,43 @@
 
 # Interface: BotConfig
 
-Defined in: [src/bot.ts:37](../src/bot.ts#L37)
+Defined in: [src/bot.ts:35](../src/bot.ts#L35)
 
 ## Properties
 
 ### dbOpts
 
-> **dbOpts**: [`BotDbOpts`](bot.Interface.BotDbOpts.md)
+> **dbOpts**: [`BotDbOpts`](bot.TypeAlias.BotDbOpts.md)
 
-Defined in: [src/bot.ts:39](../src/bot.ts#L39)
+Defined in: [src/bot.ts:37](../src/bot.ts#L37)
 
 ***
 
 ### events?
 
-> `optional` **events**: [`EventSubscribers`](api.TypeAlias.EventSubscribers.md)
+> `optional` **events?**: [`EventSubscribers`](api.TypeAlias.EventSubscribers.md)
 
-Defined in: [src/bot.ts:46](../src/bot.ts#L46)
+Defined in: [src/bot.ts:44](../src/bot.ts#L44)
 
 ***
 
 ### onCommands?
 
-> `optional` **onCommands**: \{\[`key`: `string`\]: (`chatItem`, `command`) => `void` \| `Promise`\<`void`\> \| `undefined`; \}
+> `optional` **onCommands?**: `object`
 
-Defined in: [src/bot.ts:43](../src/bot.ts#L43)
+Defined in: [src/bot.ts:41](../src/bot.ts#L41)
 
 #### Index Signature
 
-\[`key`: `string`\]: (`chatItem`, `command`) => `void` \| `Promise`\<`void`\> \| `undefined`
+\[`key`: `string`\]: ((`chatItem`, `command`) => `void` \| `Promise`\<`void`\>) \| `undefined`
 
 ***
 
-### onMessage()?
+### onMessage?
 
-> `optional` **onMessage**: (`chatItem`, `content`) => `void` \| `Promise`\<`void`\>
+> `optional` **onMessage?**: (`chatItem`, `content`) => `void` \| `Promise`\<`void`\>
 
-Defined in: [src/bot.ts:41](../src/bot.ts#L41)
+Defined in: [src/bot.ts:39](../src/bot.ts#L39)
 
 #### Parameters
 
@@ -64,7 +64,7 @@ Defined in: [src/bot.ts:41](../src/bot.ts#L41)
 
 > **options**: [`BotOptions`](bot.Interface.BotOptions.md)
 
-Defined in: [src/bot.ts:40](../src/bot.ts#L40)
+Defined in: [src/bot.ts:38](../src/bot.ts#L38)
 
 ***
 
@@ -72,4 +72,4 @@ Defined in: [src/bot.ts:40](../src/bot.ts#L40)
 
 > **profile**: `Profile`
 
-Defined in: [src/bot.ts:38](../src/bot.ts#L38)
+Defined in: [src/bot.ts:36](../src/bot.ts#L36)
diff --git a/packages/simplex-chat-nodejs/docs/bot.Interface.BotDbOpts.md b/packages/simplex-chat-nodejs/docs/bot.Interface.BotDbOpts.md
deleted file mode 100644
index 7a9f113f6a..0000000000
--- a/packages/simplex-chat-nodejs/docs/bot.Interface.BotDbOpts.md
+++ /dev/null
@@ -1,33 +0,0 @@
-[**simplex-chat**](README.md)
-
-***
-
-[simplex-chat](README.md) / [bot](Namespace.bot.md) / BotDbOpts
-
-# Interface: BotDbOpts
-
-Defined in: [src/bot.ts:7](../src/bot.ts#L7)
-
-## Properties
-
-### confirmMigrations?
-
-> `optional` **confirmMigrations**: [`MigrationConfirmation`](core.Enumeration.MigrationConfirmation.md)
-
-Defined in: [src/bot.ts:10](../src/bot.ts#L10)
-
-***
-
-### dbFilePrefix
-
-> **dbFilePrefix**: `string`
-
-Defined in: [src/bot.ts:8](../src/bot.ts#L8)
-
-***
-
-### dbKey?
-
-> `optional` **dbKey**: `string`
-
-Defined in: [src/bot.ts:9](../src/bot.ts#L9)
diff --git a/packages/simplex-chat-nodejs/docs/bot.Interface.BotOptions.md b/packages/simplex-chat-nodejs/docs/bot.Interface.BotOptions.md
index 44d4380e5a..eee56b879a 100644
--- a/packages/simplex-chat-nodejs/docs/bot.Interface.BotOptions.md
+++ b/packages/simplex-chat-nodejs/docs/bot.Interface.BotOptions.md
@@ -6,76 +6,76 @@
 
 # Interface: BotOptions
 
-Defined in: [src/bot.ts:13](../src/bot.ts#L13)
+Defined in: [src/bot.ts:11](../src/bot.ts#L11)
 
 ## Properties
 
 ### addressSettings?
 
-> `optional` **addressSettings**: [`BotAddressSettings`](api.Interface.BotAddressSettings.md)
-
-Defined in: [src/bot.ts:17](../src/bot.ts#L17)
-
-***
-
-### allowFiles?
-
-> `optional` **allowFiles**: `boolean`
-
-Defined in: [src/bot.ts:18](../src/bot.ts#L18)
-
-***
-
-### commands?
-
-> `optional` **commands**: `ChatBotCommand`[]
-
-Defined in: [src/bot.ts:19](../src/bot.ts#L19)
-
-***
-
-### createAddress?
-
-> `optional` **createAddress**: `boolean`
-
-Defined in: [src/bot.ts:14](../src/bot.ts#L14)
-
-***
-
-### logContacts?
-
-> `optional` **logContacts**: `boolean`
-
-Defined in: [src/bot.ts:21](../src/bot.ts#L21)
-
-***
-
-### logNetwork?
-
-> `optional` **logNetwork**: `boolean`
-
-Defined in: [src/bot.ts:22](../src/bot.ts#L22)
-
-***
-
-### updateAddress?
-
-> `optional` **updateAddress**: `boolean`
+> `optional` **addressSettings?**: [`BotAddressSettings`](api.Interface.BotAddressSettings.md)
 
 Defined in: [src/bot.ts:15](../src/bot.ts#L15)
 
 ***
 
-### updateProfile?
+### allowFiles?
 
-> `optional` **updateProfile**: `boolean`
+> `optional` **allowFiles?**: `boolean`
 
 Defined in: [src/bot.ts:16](../src/bot.ts#L16)
 
 ***
 
-### useBotProfile?
+### commands?
 
-> `optional` **useBotProfile**: `boolean`
+> `optional` **commands?**: `ChatBotCommand`[]
+
+Defined in: [src/bot.ts:17](../src/bot.ts#L17)
+
+***
+
+### createAddress?
+
+> `optional` **createAddress?**: `boolean`
+
+Defined in: [src/bot.ts:12](../src/bot.ts#L12)
+
+***
+
+### logContacts?
+
+> `optional` **logContacts?**: `boolean`
+
+Defined in: [src/bot.ts:19](../src/bot.ts#L19)
+
+***
+
+### logNetwork?
+
+> `optional` **logNetwork?**: `boolean`
 
 Defined in: [src/bot.ts:20](../src/bot.ts#L20)
+
+***
+
+### updateAddress?
+
+> `optional` **updateAddress?**: `boolean`
+
+Defined in: [src/bot.ts:13](../src/bot.ts#L13)
+
+***
+
+### updateProfile?
+
+> `optional` **updateProfile?**: `boolean`
+
+Defined in: [src/bot.ts:14](../src/bot.ts#L14)
+
+***
+
+### useBotProfile?
+
+> `optional` **useBotProfile?**: `boolean`
+
+Defined in: [src/bot.ts:18](../src/bot.ts#L18)
diff --git a/packages/simplex-chat-nodejs/docs/bot.TypeAlias.BotDbOpts.md b/packages/simplex-chat-nodejs/docs/bot.TypeAlias.BotDbOpts.md
new file mode 100644
index 0000000000..b035f41355
--- /dev/null
+++ b/packages/simplex-chat-nodejs/docs/bot.TypeAlias.BotDbOpts.md
@@ -0,0 +1,17 @@
+[**simplex-chat**](README.md)
+
+***
+
+[simplex-chat](README.md) / [bot](Namespace.bot.md) / BotDbOpts
+
+# Type Alias: BotDbOpts
+
+> **BotDbOpts** = [`DbConfig`](api.TypeAlias.DbConfig.md) & `object`
+
+Defined in: [src/bot.ts:7](../src/bot.ts#L7)
+
+## Type Declaration
+
+### confirmMigrations?
+
+> `optional` **confirmMigrations?**: [`MigrationConfirmation`](core.Enumeration.MigrationConfirmation.md)
diff --git a/packages/simplex-chat-nodejs/docs/core.Class.ChatAPIError.md b/packages/simplex-chat-nodejs/docs/core.Class.ChatAPIError.md
index c6082f2985..5bd0722f0c 100644
--- a/packages/simplex-chat-nodejs/docs/core.Class.ChatAPIError.md
+++ b/packages/simplex-chat-nodejs/docs/core.Class.ChatAPIError.md
@@ -16,7 +16,7 @@ Defined in: [src/core.ts:92](../src/core.ts#L92)
 
 ### Constructor
 
-> **new ChatAPIError**(`message`, `chatError`): `ChatAPIError`
+> **new ChatAPIError**(`message`, `chatError?`): `ChatAPIError`
 
 Defined in: [src/core.ts:93](../src/core.ts#L93)
 
@@ -26,9 +26,9 @@ Defined in: [src/core.ts:93](../src/core.ts#L93)
 
 `string`
 
-##### chatError
+##### chatError?
 
-`ChatError` | `undefined`
+`ChatError` \| `undefined`
 
 #### Returns
 
@@ -74,7 +74,7 @@ Defined in: [node\_modules/typescript/lib/lib.es5.d.ts:1076](../node_modules/typ
 
 ### stack?
 
-> `optional` **stack**: `string`
+> `optional` **stack?**: `string`
 
 Defined in: [node\_modules/typescript/lib/lib.es5.d.ts:1078](../node_modules/typescript/lib/lib.es5.d.ts#L1078)
 
diff --git a/packages/simplex-chat-nodejs/docs/core.Class.ChatInitError.md b/packages/simplex-chat-nodejs/docs/core.Class.ChatInitError.md
index eff5123fb0..0feceae4fd 100644
--- a/packages/simplex-chat-nodejs/docs/core.Class.ChatInitError.md
+++ b/packages/simplex-chat-nodejs/docs/core.Class.ChatInitError.md
@@ -74,7 +74,7 @@ Defined in: [node\_modules/typescript/lib/lib.es5.d.ts:1076](../node_modules/typ
 
 ### stack?
 
-> `optional` **stack**: `string`
+> `optional` **stack?**: `string`
 
 Defined in: [node\_modules/typescript/lib/lib.es5.d.ts:1078](../node_modules/typescript/lib/lib.es5.d.ts#L1078)
 
diff --git a/packages/simplex-chat-nodejs/docs/core.Interface.APIResult.md b/packages/simplex-chat-nodejs/docs/core.Interface.APIResult.md
index 906ef3ec3e..8d18997ec4 100644
--- a/packages/simplex-chat-nodejs/docs/core.Interface.APIResult.md
+++ b/packages/simplex-chat-nodejs/docs/core.Interface.APIResult.md
@@ -18,7 +18,7 @@ Defined in: [src/core.ts:87](../src/core.ts#L87)
 
 ### error?
 
-> `optional` **error**: `ChatError`
+> `optional` **error?**: `ChatError`
 
 Defined in: [src/core.ts:89](../src/core.ts#L89)
 
@@ -26,6 +26,6 @@ Defined in: [src/core.ts:89](../src/core.ts#L89)
 
 ### result?
 
-> `optional` **result**: `R`
+> `optional` **result?**: `R`
 
 Defined in: [src/core.ts:88](../src/core.ts#L88)
diff --git a/packages/simplex-chat-nodejs/examples/squaring-bot-readme.js b/packages/simplex-chat-nodejs/examples/squaring-bot-readme.js
index 16d0678b64..8899e9bf15 100644
--- a/packages/simplex-chat-nodejs/examples/squaring-bot-readme.js
+++ b/packages/simplex-chat-nodejs/examples/squaring-bot-readme.js
@@ -2,7 +2,7 @@
   const {bot} = await import("../dist/index.js")
   const [chat, _user, _address] = await bot.run({
     profile: {displayName: "Squaring bot example", fullName: ""},
-    dbOpts: {dbFilePrefix: "./squaring_bot", dbKey: ""},
+    dbOpts: {type: "sqlite", filePrefix: "./squaring_bot"},
     options: {
       addressSettings: {welcomeMessage: "Send a number, I will square it."},
     },
diff --git a/packages/simplex-chat-nodejs/examples/squaring-bot.ts b/packages/simplex-chat-nodejs/examples/squaring-bot.ts
index 682e7b887a..dbb58d90dc 100644
--- a/packages/simplex-chat-nodejs/examples/squaring-bot.ts
+++ b/packages/simplex-chat-nodejs/examples/squaring-bot.ts
@@ -5,7 +5,7 @@ import {bot, util} from "../dist"
   const welcomeMessage = "Hello! I am a simple squaring bot.\n\nIf you send me a number, I will calculate its square."
   const [chat, _user, _address] = await bot.run({
     profile: {displayName: "Squaring bot example", fullName: ""},
-    dbOpts: {dbFilePrefix: "./squaring_bot", dbKey: ""},
+    dbOpts: {type: "sqlite", filePrefix: "./squaring_bot"},
     options: {
       addressSettings: {autoAccept: true, welcomeMessage, businessAddress: false},
       commands: [ // commands to show in client UI
diff --git a/packages/simplex-chat-nodejs/src/api.ts b/packages/simplex-chat-nodejs/src/api.ts
index 72a7fa93b4..f1337e6753 100644
--- a/packages/simplex-chat-nodejs/src/api.ts
+++ b/packages/simplex-chat-nodejs/src/api.ts
@@ -56,6 +56,41 @@ interface EventSubscriber<K extends CEvt.Tag> {
   once: boolean
 }
 
+/**
+ * Database configuration. The native library is built against exactly one
+ * backend (see `simplex_backend` / `SIMPLEX_BACKEND` at install time); this
+ * type makes the caller state which one they are targeting so field names
+ * can't lie about their meaning.
+ */
+export type DbConfig =
+  | {
+      /** SQLite backend (default). */
+      type: "sqlite"
+      /** File prefix — two schema files are named `<prefix>_chat.db` and `<prefix>_agent.db`. */
+      filePrefix: string
+      /** Optional SQLCipher encryption key. Empty/omitted = unencrypted. */
+      encryptionKey?: string
+    }
+  | {
+      /** PostgreSQL backend (Linux x86_64 only, libpq5 required). */
+      type: "postgres"
+      /** Schema prefix used to namespace tables. Defaults to `"simplex_v1"` when omitted. */
+      schemaPrefix?: string
+      /** PostgreSQL connection string (e.g. `postgres://user:pass@host/db`). */
+      connectionString: string
+    }
+
+function dbConfigToMigrateArgs(db: DbConfig): [string, string] {
+  switch (db.type) {
+    case "sqlite":
+      return [db.filePrefix, db.encryptionKey ?? ""]
+    case "postgres":
+      return [db.schemaPrefix ?? "", db.connectionString]
+    default:
+      throw new Error(`Invalid DbConfig: ${JSON.stringify(db satisfies never)}`)
+  }
+}
+
 /**
  * Main API class for interacting with the chat core library.
  */
@@ -64,21 +99,20 @@ export class ChatApi {
   private eventsLoop: Promise<void> | undefined = undefined
   private subscribers: {[K in CEvt.Tag]?: EventSubscriber<K>[]} = {}
   private receivers: EventSubscriberFunc<CEvt.Tag>[] = []
-  
+
   private constructor(protected ctrl_: bigint | undefined) {}
 
   /**
    * Initializes the ChatApi.
-   * @param {string} dbFilePrefix - File prefix for the database files.
-   * @param {string} [dbKey=""] - Database encryption key.
+   * @param {DbConfig} db - Database configuration (sqlite or postgres).
    * @param {core.MigrationConfirmation} [confirm=core.MigrationConfirmation.YesUp] - Migration confirmation mode.
    */
   static async init(
-    dbFilePrefix: string,
-    dbKey: string = "",
+    db: DbConfig,
     confirm = core.MigrationConfirmation.YesUp
   ): Promise<ChatApi> {
-    const ctrl = await core.chatMigrateInit(dbFilePrefix, dbKey, confirm)
+    const [path, key] = dbConfigToMigrateArgs(db)
+    const ctrl = await core.chatMigrateInit(path, key, confirm)
     return new ChatApi(ctrl)
   }
 
diff --git a/packages/simplex-chat-nodejs/src/bot.ts b/packages/simplex-chat-nodejs/src/bot.ts
index 95a0c13d96..f6cb753d27 100644
--- a/packages/simplex-chat-nodejs/src/bot.ts
+++ b/packages/simplex-chat-nodejs/src/bot.ts
@@ -4,9 +4,7 @@ import * as core from "./core"
 import * as util from "./util"
 import equal = require("fast-deep-equal")
 
-export interface BotDbOpts {
-  dbFilePrefix: string // two schema files will be named <prefix>_chat.db and <prefix>_agent.db
-  dbKey?: string
+export type BotDbOpts = api.DbConfig & {
   confirmMigrations?: core.MigrationConfirmation
 }
 
@@ -47,7 +45,7 @@ export interface BotConfig {
 }
 
 export async function run({profile, dbOpts, options = defaultOpts, onMessage, onCommands = {}, events = {}}: BotConfig): Promise<[api.ChatApi, T.User, T.UserContactLink | undefined]> {
-  const bot = await api.ChatApi.init(dbOpts.dbFilePrefix, dbOpts.dbKey || "", dbOpts.confirmMigrations || core.MigrationConfirmation.YesUp)
+  const bot = await api.ChatApi.init(dbOpts, dbOpts.confirmMigrations || core.MigrationConfirmation.YesUp)
   const opts = fullOptions(options)
   if (onMessage) subscribeMessages(bot, onMessage)
   if (Object.keys(onCommands).length > 0) subscribeCommands(bot, onCommands)
diff --git a/packages/simplex-chat-nodejs/tests/api.test.ts b/packages/simplex-chat-nodejs/tests/api.test.ts
index 7bc1a89b86..99d511371c 100644
--- a/packages/simplex-chat-nodejs/tests/api.test.ts
+++ b/packages/simplex-chat-nodejs/tests/api.test.ts
@@ -15,8 +15,8 @@ describe("API tests (use preset servers)", () => {
 
   it("should send/receive message", async () => {
     // create users and start chat controllers
-    const alice = await api.ChatApi.init(alicePath)
-    const bob = await api.ChatApi.init(bobPath)
+    const alice = await api.ChatApi.init({type: "sqlite", filePrefix: alicePath})
+    const bob = await api.ChatApi.init({type: "sqlite", filePrefix: bobPath})
     const servers: string[] = []
     let eventCount = 0
     alice.on("hostConnected" as CEvt.Tag, async ({transportHost}: any) => { servers.push(transportHost) })
@@ -67,10 +67,10 @@ describe("API tests (use preset servers)", () => {
 
   it("should create member contact and send invitation", async () => {
     // create 3 users and start chat controllers
-    const alice = await api.ChatApi.init(alicePath)
-    const bob = await api.ChatApi.init(bobPath)
+    const alice = await api.ChatApi.init({type: "sqlite", filePrefix: alicePath})
+    const bob = await api.ChatApi.init({type: "sqlite", filePrefix: bobPath})
     const carolPath = path.join(tmpDir, "carol")
-    const carol = await api.ChatApi.init(carolPath)
+    const carol = await api.ChatApi.init({type: "sqlite", filePrefix: carolPath})
     const aliceUser = await alice.apiCreateActiveUser({displayName: "alice", fullName: ""})
     await bob.apiCreateActiveUser({displayName: "bob", fullName: ""})
     await carol.apiCreateActiveUser({displayName: "carol", fullName: ""})
diff --git a/packages/simplex-chat-nodejs/tests/bot.test.ts b/packages/simplex-chat-nodejs/tests/bot.test.ts
index b1fd9d0186..5a7faa663f 100644
--- a/packages/simplex-chat-nodejs/tests/bot.test.ts
+++ b/packages/simplex-chat-nodejs/tests/bot.test.ts
@@ -18,7 +18,7 @@ describe("Bot tests (use preset servers)", () => {
     // run bot
     const [chat, botUser, botAddress] = await bot.run({
       profile: {displayName: "Squaring bot", fullName: ""},
-      dbOpts: {dbFilePrefix: botPath, dbKey: ""},
+      dbOpts: {type: "sqlite", filePrefix: botPath},
       options: {
         addressSettings: {welcomeMessage: "If you send me a number, I will calculate its square."},
       },
@@ -30,7 +30,7 @@ describe("Bot tests (use preset servers)", () => {
     })
     assert(typeof botAddress === "object")
     // create user
-    const alice = await api.ChatApi.init(alicePath)
+    const alice = await api.ChatApi.init({type: "sqlite", filePrefix: alicePath})
     const aliceUser = await alice.apiCreateActiveUser({displayName: "alice", fullName: ""})
     await alice.startChat()
     // connect to bot