mirror of
https://github.com/simplex-chat/simplexmq.git
synced 2026-07-03 15:31:56 +00:00
Alain Brenzikofer
477 lines
15 KiB
Python
Executable File
477 lines
15 KiB
Python
Executable File
#!/usr/bin/env python3
|
|
"""SimpleX Namespace (SNRC) resolver — REST API.
|
|
|
|
Resolves names like `alice.testing` / `bob.simplex` against the SNRC
|
|
deployment on Sepolia (or any compatible ENS-shaped registry) and
|
|
returns a flat JSON document with:
|
|
|
|
name, nickname, website, location,
|
|
simplex.contact, simplex.channel,
|
|
ETH, BTC, XMR, DOT,
|
|
owner, resolver
|
|
|
|
Usage:
|
|
./snrc-resolve.py # serve on :8000
|
|
|
|
curl -s http://127.0.0.1:8000/resolve/secondtest.testing | jq .
|
|
curl -s http://127.0.0.1:8000/health
|
|
|
|
Environment:
|
|
SNRC_RPC JSON-RPC endpoint (default: http://127.0.0.1:8545)
|
|
SNRC_REGISTRY_TESTING ENSRegistry for the .testing deployment
|
|
(default: mainnet,
|
|
0x03f438da0bd44da3c6c1d0392f8ba183b8b3a7a6)
|
|
SNRC_REGISTRY_SIMPLEX ENSRegistry for the .simplex deployment
|
|
(default: empty — TLD not yet deployed)
|
|
SNRC_PORT Listen port (default: 8000)
|
|
SNRC_BIND Bind address (default: 0.0.0.0)
|
|
|
|
Each TLD is a separate SNRC deployment with its own ENSRegistry; the
|
|
resolver dispatches by the queried name's rightmost label.
|
|
|
|
Same dependency surface as ens-lookup.py:
|
|
pip install --break-system-packages 'eth-hash[pycryptodome]'
|
|
|
|
Addresses are returned in each chain's canonical presentation:
|
|
ETH EIP-55 mixed-case checksummed hex (e.g. 0xEa65A0…1572)
|
|
BTC bech32(m) for segwit/taproot, base58check for P2PKH/P2SH
|
|
(e.g. bc1q… / 1A1zP1…)
|
|
DOT SS58 with Polkadot network prefix 0 (e.g. 15oF4u…)
|
|
XMR Monero base58 (e.g. 4Aux5y…)
|
|
Unrecognised payloads fall back to `0x`-prefixed raw hex.
|
|
"""
|
|
|
|
import hashlib
|
|
import json
|
|
import os
|
|
import sys
|
|
from http.server import BaseHTTPRequestHandler, ThreadingHTTPServer
|
|
from urllib.parse import unquote, urlparse
|
|
from urllib.request import Request, urlopen
|
|
|
|
from eth_hash.auto import keccak
|
|
|
|
RPC = os.environ.get("SNRC_RPC", "http://127.0.0.1:8545")
|
|
BIND = os.environ.get("SNRC_BIND", "0.0.0.0")
|
|
PORT = int(os.environ.get("SNRC_PORT", "8000"))
|
|
|
|
# Each TLD is its own SNRC deployment with its own ENSRegistry. Dispatch
|
|
# happens on the rightmost label of the queried name. Empty / unset means
|
|
# "not deployed" — requests for that TLD return 400 with a clear error.
|
|
REGISTRIES = {
|
|
"testing": os.environ.get(
|
|
"SNRC_REGISTRY_TESTING",
|
|
"0x03f438da0bd44da3c6c1d0392f8ba183b8b3a7a6", # mainnet .testing
|
|
),
|
|
"simplex": os.environ.get("SNRC_REGISTRY_SIMPLEX", ""), # not deployed yet
|
|
}
|
|
|
|
# SLIP-44 coin types (https://github.com/satoshilabs/slips/blob/master/slip-0044.md)
|
|
COIN_ETH = 60
|
|
COIN_BTC = 0
|
|
COIN_XMR = 128
|
|
COIN_DOT = 354
|
|
|
|
ZERO_ADDR = "0x0000000000000000000000000000000000000000"
|
|
|
|
|
|
# ---------- RPC + ABI helpers (mirrors ens-lookup.py shape) ----------
|
|
|
|
def rpc(method, params):
|
|
body = json.dumps(
|
|
{"jsonrpc": "2.0", "method": method, "params": params, "id": 1}
|
|
).encode()
|
|
# Set a non-default User-Agent; Cloudflare-fronted public RPCs (drpc,
|
|
# publicnode, etc.) reject `Python-urllib/3.x` with 403.
|
|
req = Request(
|
|
RPC,
|
|
data=body,
|
|
headers={
|
|
"Content-Type": "application/json",
|
|
"User-Agent": "snrc-resolve/1.0",
|
|
},
|
|
)
|
|
res = json.loads(urlopen(req, timeout=15).read())
|
|
if "error" in res:
|
|
raise RuntimeError(res["error"])
|
|
return res["result"]
|
|
|
|
|
|
def namehash(name: str) -> bytes:
|
|
node = b"\x00" * 32
|
|
if name:
|
|
for label in reversed(name.split(".")):
|
|
node = keccak(node + keccak(label.encode()))
|
|
return node
|
|
|
|
|
|
def selector(signature: str) -> str:
|
|
return "0x" + keccak(signature.encode())[:4].hex()
|
|
|
|
|
|
def eth_call(to: str, data: str) -> str:
|
|
return rpc("eth_call", [{"to": to, "data": data}, "latest"])
|
|
|
|
|
|
def decode_address(hex_data: str) -> str:
|
|
return "0x" + hex_data[-40:]
|
|
|
|
|
|
def decode_bytes(hex_data: str) -> bytes:
|
|
raw = bytes.fromhex(hex_data[2:] if hex_data.startswith("0x") else hex_data)
|
|
if len(raw) < 64:
|
|
return b""
|
|
length = int.from_bytes(raw[32:64], "big")
|
|
return raw[64:64 + length]
|
|
|
|
|
|
def encode_text_call(node: bytes, key: str) -> str:
|
|
sel = selector("text(bytes32,string)")
|
|
head = node.hex() + (0x40).to_bytes(32, "big").hex()
|
|
key_bytes = key.encode()
|
|
body = len(key_bytes).to_bytes(32, "big").hex() + key_bytes.hex()
|
|
body += "00" * ((-len(key_bytes)) % 32)
|
|
return sel + head + body
|
|
|
|
|
|
def text(resolver: str, node: bytes, key: str) -> str:
|
|
raw = decode_bytes(eth_call(resolver, encode_text_call(node, key)))
|
|
return raw.decode("utf-8", errors="replace") if raw else ""
|
|
|
|
|
|
def encode_addr_multicoin_call(node: bytes, coin_type: int) -> str:
|
|
"""ENSIP-9 addr(bytes32 node, uint256 coinType) — both static, no offsets."""
|
|
return (
|
|
selector("addr(bytes32,uint256)")
|
|
+ node.hex()
|
|
+ coin_type.to_bytes(32, "big").hex()
|
|
)
|
|
|
|
|
|
def addr_multicoin(resolver: str, node: bytes, coin_type: int):
|
|
"""Read ENSIP-9 raw bytes for `coinType`, then encode to that chain's
|
|
canonical presentation form. Falls back to `0x`-prefixed hex if the
|
|
payload doesn't match any recognised on-chain shape. Returns None when
|
|
the record is unset."""
|
|
try:
|
|
raw = decode_bytes(eth_call(resolver, encode_addr_multicoin_call(node, coin_type)))
|
|
except RuntimeError:
|
|
return None
|
|
if not raw:
|
|
return None
|
|
# An all-zero payload is the ENS convention for "unset" — many tools
|
|
# write 20 zero bytes for coinType=60 instead of clearing the slot.
|
|
# Treat it as null so the response doesn't surface a zero address.
|
|
if raw == b"\x00" * len(raw):
|
|
return None
|
|
encoder = COIN_ENCODERS.get(coin_type)
|
|
if encoder is None:
|
|
return "0x" + raw.hex()
|
|
try:
|
|
return encoder(raw) or ("0x" + raw.hex())
|
|
except Exception:
|
|
return "0x" + raw.hex()
|
|
|
|
|
|
# ---------- Coin-specific address encoders ----------
|
|
# Each takes raw bytes as stored under ENSIP-9 and returns the canonical
|
|
# user-facing string for that chain (EIP-55 for ETH, bech32/base58check
|
|
# for BTC, SS58 for DOT, Monero-base58 for XMR). All stdlib + eth_hash.
|
|
|
|
|
|
B58_ALPHA = "123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz"
|
|
|
|
|
|
def _b58_encode(b: bytes) -> str:
|
|
n = int.from_bytes(b, "big")
|
|
out = ""
|
|
while n:
|
|
n, r = divmod(n, 58)
|
|
out = B58_ALPHA[r] + out
|
|
# leading zero bytes → leading '1's
|
|
pad = len(b) - len(b.lstrip(b"\x00"))
|
|
return "1" * pad + out
|
|
|
|
|
|
def _b58check_encode(payload: bytes) -> str:
|
|
"""Base58Check used by BTC legacy/P2SH: payload + dSHA256(payload)[:4]."""
|
|
chk = hashlib.sha256(hashlib.sha256(payload).digest()).digest()[:4]
|
|
return _b58_encode(payload + chk)
|
|
|
|
|
|
# ---- Bech32 / Bech32m (BIP-173 / BIP-350) ----
|
|
|
|
_BECH32_CHARSET = "qpzry9x8gf2tvdw0s3jn54khce6mua7l"
|
|
_BECH32_GEN = [0x3B6A57B2, 0x26508E6D, 0x1EA119FA, 0x3D4233DD, 0x2A1462B3]
|
|
|
|
|
|
def _bech32_polymod(values):
|
|
chk = 1
|
|
for v in values:
|
|
b = chk >> 25
|
|
chk = ((chk & 0x1FFFFFF) << 5) ^ v
|
|
for i in range(5):
|
|
if (b >> i) & 1:
|
|
chk ^= _BECH32_GEN[i]
|
|
return chk
|
|
|
|
|
|
def _bech32_hrp_expand(hrp):
|
|
return [ord(c) >> 5 for c in hrp] + [0] + [ord(c) & 31 for c in hrp]
|
|
|
|
|
|
def _bech32_create_checksum(hrp, data, spec):
|
|
const = 1 if spec == "bech32" else 0x2BC830A3 # bech32m
|
|
values = _bech32_hrp_expand(hrp) + data + [0] * 6
|
|
polymod = _bech32_polymod(values) ^ const
|
|
return [(polymod >> 5 * (5 - i)) & 31 for i in range(6)]
|
|
|
|
|
|
def _bech32_encode(hrp, data, spec):
|
|
combined = data + _bech32_create_checksum(hrp, data, spec)
|
|
return hrp + "1" + "".join(_BECH32_CHARSET[d] for d in combined)
|
|
|
|
|
|
def _convertbits(data, frombits, tobits, pad=True):
|
|
acc = 0
|
|
bits = 0
|
|
ret = []
|
|
maxv = (1 << tobits) - 1
|
|
max_acc = (1 << (frombits + tobits - 1)) - 1
|
|
for value in data:
|
|
if value < 0 or (value >> frombits):
|
|
return None
|
|
acc = ((acc << frombits) | value) & max_acc
|
|
bits += frombits
|
|
while bits >= tobits:
|
|
bits -= tobits
|
|
ret.append((acc >> bits) & maxv)
|
|
if pad and bits:
|
|
ret.append((acc << (tobits - bits)) & maxv)
|
|
elif not pad and (bits >= frombits or ((acc << (tobits - bits)) & maxv)):
|
|
return None
|
|
return ret
|
|
|
|
|
|
def _segwit_encode(hrp: str, witver: int, witprog: bytes) -> str:
|
|
spec = "bech32" if witver == 0 else "bech32m"
|
|
data = [witver] + _convertbits(list(witprog), 8, 5)
|
|
return _bech32_encode(hrp, data, spec)
|
|
|
|
|
|
# ---- BTC scriptPubKey → address ----
|
|
# ENSIP-9 stores the raw output script. Dispatch by length + opcode prefix.
|
|
|
|
def _btc_encode(raw: bytes) -> str | None:
|
|
hrp = "bc" # mainnet
|
|
if len(raw) == 25 and raw[:3] == b"\x76\xa9\x14" and raw[23:25] == b"\x88\xac":
|
|
return _b58check_encode(b"\x00" + raw[3:23]) # P2PKH
|
|
if len(raw) == 23 and raw[:2] == b"\xa9\x14" and raw[22:23] == b"\x87":
|
|
return _b58check_encode(b"\x05" + raw[2:22]) # P2SH
|
|
if len(raw) == 22 and raw[:2] == b"\x00\x14":
|
|
return _segwit_encode(hrp, 0, raw[2:22]) # P2WPKH
|
|
if len(raw) == 34 and raw[:2] == b"\x00\x20":
|
|
return _segwit_encode(hrp, 0, raw[2:34]) # P2WSH
|
|
if len(raw) == 34 and raw[:2] == b"\x51\x20":
|
|
return _segwit_encode(hrp, 1, raw[2:34]) # P2TR
|
|
return None
|
|
|
|
|
|
# ---- Polkadot SS58 ----
|
|
# Per SS58 spec: base58( prefix_byte + pubkey + blake2b-512("SS58PRE" + body)[:2] )
|
|
# Polkadot mainnet uses network prefix 0 (single byte); Kusama uses 2.
|
|
|
|
_SS58_PRE = b"SS58PRE"
|
|
|
|
|
|
def _ss58_encode(pubkey: bytes, network_prefix: int = 0) -> str:
|
|
if len(pubkey) != 32:
|
|
return None
|
|
body = bytes([network_prefix]) + pubkey
|
|
checksum = hashlib.blake2b(_SS58_PRE + body, digest_size=64).digest()[:2]
|
|
return _b58_encode(body + checksum)
|
|
|
|
|
|
def _dot_encode(raw: bytes) -> str | None:
|
|
return _ss58_encode(raw, network_prefix=0)
|
|
|
|
|
|
# ---- Monero base58 ----
|
|
# Monero base58 encodes in 8-byte blocks; each full block → 11 chars, partial
|
|
# block sizes per fixed table. Alphabet is identical to Bitcoin's.
|
|
|
|
_XMR_BLOCK_SIZES = [0, 2, 3, 5, 6, 7, 9, 10, 11]
|
|
|
|
|
|
def _xmr_encode(raw: bytes) -> str:
|
|
out = []
|
|
for i in range(0, len(raw), 8):
|
|
chunk = raw[i:i + 8]
|
|
n = int.from_bytes(chunk, "big")
|
|
width = 11 if len(chunk) == 8 else _XMR_BLOCK_SIZES[len(chunk)]
|
|
block = []
|
|
for _ in range(width):
|
|
n, r = divmod(n, 58)
|
|
block.append(B58_ALPHA[r])
|
|
out.append("".join(reversed(block)))
|
|
return "".join(out)
|
|
|
|
|
|
# ---- ETH EIP-55 mixed-case checksum ----
|
|
|
|
def _eth_encode(raw: bytes) -> str | None:
|
|
if len(raw) != 20:
|
|
return None
|
|
hex_addr = raw.hex()
|
|
hash_hex = keccak(hex_addr.encode()).hex()
|
|
return "0x" + "".join(
|
|
c.upper() if c.isalpha() and int(hash_hex[i], 16) >= 8 else c
|
|
for i, c in enumerate(hex_addr)
|
|
)
|
|
|
|
|
|
COIN_ENCODERS = {
|
|
COIN_ETH: _eth_encode,
|
|
COIN_BTC: _btc_encode,
|
|
COIN_XMR: _xmr_encode,
|
|
COIN_DOT: _dot_encode,
|
|
}
|
|
|
|
|
|
# ---------- Resolution logic ----------
|
|
|
|
# Text-record keys we read from the resolver. Surfaced under the response
|
|
# field names listed in the docstring above. `name` and `description` are
|
|
# common ENS fallbacks for a human-readable nickname.
|
|
TEXT_KEYS = [
|
|
"name",
|
|
"nickname",
|
|
"description",
|
|
"url",
|
|
"location",
|
|
"simplex.contact",
|
|
"simplex.channel",
|
|
]
|
|
|
|
|
|
def resolve(name: str):
|
|
tld = name.rsplit(".", 1)[-1]
|
|
registry = REGISTRIES.get(tld)
|
|
if not registry:
|
|
configured = [k for k, v in REGISTRIES.items() if v]
|
|
return 400, {
|
|
"name": name,
|
|
"error": f"TLD '{tld}' is not configured on this resolver",
|
|
"configured_tlds": configured,
|
|
}
|
|
|
|
node = namehash(name)
|
|
node_hex = node.hex()
|
|
|
|
resolver_raw = eth_call(registry, selector("resolver(bytes32)") + node_hex)
|
|
resolver_addr = decode_address(resolver_raw)
|
|
if resolver_addr == ZERO_ADDR:
|
|
return 404, {"name": name, "error": "no resolver set for this name"}
|
|
|
|
owner_raw = eth_call(registry, selector("owner(bytes32)") + node_hex)
|
|
owner = decode_address(owner_raw)
|
|
|
|
texts = {}
|
|
for k in TEXT_KEYS:
|
|
try:
|
|
v = text(resolver_addr, node, k)
|
|
except RuntimeError:
|
|
v = ""
|
|
if v:
|
|
texts[k] = v
|
|
|
|
# The user-facing "nickname" prefers an explicit `nickname` record,
|
|
# falls back to `name`, then `description` (ENSIP-5 convention).
|
|
nickname = texts.get("nickname") or texts.get("name") or texts.get("description") or ""
|
|
|
|
return 200, {
|
|
"name": name,
|
|
"nickname": nickname,
|
|
"website": texts.get("url", ""),
|
|
"location": texts.get("location", ""),
|
|
"simplex.contact": texts.get("simplex.contact", ""),
|
|
"simplex.channel": texts.get("simplex.channel", ""),
|
|
"ETH": addr_multicoin(resolver_addr, node, COIN_ETH),
|
|
"BTC": addr_multicoin(resolver_addr, node, COIN_BTC),
|
|
"XMR": addr_multicoin(resolver_addr, node, COIN_XMR),
|
|
"DOT": addr_multicoin(resolver_addr, node, COIN_DOT),
|
|
"owner": owner,
|
|
"resolver": resolver_addr,
|
|
}
|
|
|
|
|
|
# ---------- HTTP layer ----------
|
|
|
|
class Handler(BaseHTTPRequestHandler):
|
|
def do_GET(self): # noqa: N802 - http.server contract
|
|
path = urlparse(self.path).path
|
|
parts = [unquote(p) for p in path.split("/") if p]
|
|
|
|
if parts == ["health"]:
|
|
self._respond(
|
|
200,
|
|
{"ok": True, "rpc": RPC, "registries": REGISTRIES},
|
|
)
|
|
return
|
|
|
|
if len(parts) == 2 and parts[0] == "resolve":
|
|
name = parts[1].strip().lower()
|
|
if not name or "." not in name:
|
|
self._respond(
|
|
400,
|
|
{
|
|
"error": "expected fully-qualified name, e.g. /resolve/alice.testing",
|
|
"got": name,
|
|
},
|
|
)
|
|
return
|
|
try:
|
|
status, body = resolve(name)
|
|
except Exception as e: # surface upstream errors as 502
|
|
status, body = 502, {"name": name, "error": f"{type(e).__name__}: {e}"}
|
|
self._respond(status, body)
|
|
return
|
|
|
|
self._respond(
|
|
404,
|
|
{"error": "not found", "routes": ["/health", "/resolve/<name>"]},
|
|
)
|
|
|
|
def _respond(self, status: int, body: dict):
|
|
data = json.dumps(body, indent=2).encode()
|
|
self.send_response(status)
|
|
self.send_header("Content-Type", "application/json")
|
|
self.send_header("Content-Length", str(len(data)))
|
|
self.end_headers()
|
|
self.wfile.write(data)
|
|
|
|
def log_message(self, fmt, *args):
|
|
# Quiet the default per-request access log; route to stderr in one line.
|
|
sys.stderr.write(f"{self.address_string()} - {fmt % args}\n")
|
|
|
|
|
|
def main():
|
|
server = ThreadingHTTPServer((BIND, PORT), Handler)
|
|
sys.stderr.write(
|
|
f"snrc-resolve listening on {BIND}:{PORT}\n"
|
|
f" RPC = {RPC}\n"
|
|
f" Registries:\n"
|
|
)
|
|
for tld, addr in REGISTRIES.items():
|
|
sys.stderr.write(f" .{tld:<8s} = {addr or '(not configured)'}\n")
|
|
sys.stderr.write(" GET /resolve/<name> GET /health\n")
|
|
try:
|
|
server.serve_forever()
|
|
except KeyboardInterrupt:
|
|
sys.stderr.write("\nshutting down\n")
|
|
server.server_close()
|
|
|
|
|
|
if __name__ == "__main__":
|
|
main()
|