aitbc1
0c85f89776
- Add retry mechanism with exponential backoff for block broadcast loop - Implement max 5 retries with 2s base delay for RPC connection failures - Reset retry count on successful connection - Add 20s wait period after max retries before resetting counter - Add retry logic for block import with 3 attempts and 1s base delay - Handle non-200 HTTP responses as exceptions to trigger retries - Improve error logging
213 lines
8.1 KiB
Python
Executable File
213 lines
8.1 KiB
Python
Executable File
from __future__ import annotations
|
|
|
|
import asyncio
|
|
import json
|
|
import os
|
|
from contextlib import asynccontextmanager
|
|
from pathlib import Path
|
|
from typing import Optional
|
|
|
|
from .config import settings
|
|
from .consensus import PoAProposer, ProposerConfig, CircuitBreaker
|
|
from .database import init_db, session_scope
|
|
from .logger import get_logger
|
|
from .gossip import gossip_broker, create_backend
|
|
from .sync import ChainSync
|
|
from .mempool import init_mempool
|
|
|
|
logger = get_logger(__name__)
|
|
|
|
def _load_keystore_password() -> str:
|
|
"""Load keystore password from file or environment."""
|
|
pwd_file = settings.keystore_password_file
|
|
if pwd_file.exists():
|
|
return pwd_file.read_text().strip()
|
|
env_pwd = os.getenv("KEYSTORE_PASSWORD")
|
|
if env_pwd:
|
|
return env_pwd
|
|
raise RuntimeError(f"Keystore password not found. Set in {pwd_file} or KEYSTORE_PASSWORD env.")
|
|
|
|
def _load_private_key_from_keystore(keystore_dir: Path, password: str, target_address: Optional[str] = None) -> Optional[bytes]:
|
|
"""Load an ed25519 private key from the keystore.
|
|
If target_address is given, find the keystore file with matching address.
|
|
Otherwise, return the first key found.
|
|
"""
|
|
if not keystore_dir.exists():
|
|
return None
|
|
for kf in keystore_dir.glob("*.json"):
|
|
try:
|
|
with open(kf) as f:
|
|
data = json.load(f)
|
|
addr = data.get("address")
|
|
if target_address and addr != target_address:
|
|
continue
|
|
# Decrypt
|
|
from cryptography.hazmat.primitives.asymmetric import ed25519
|
|
from cryptography.hazmat.primitives.kdf.pbkdf2 import PBKDF2HMAC
|
|
from cryptography.hazmat.primitives import hashes
|
|
from cryptography.hazmat.primitives.ciphers.aead import AESGCM
|
|
from cryptography.hazmat.backends import default_backend
|
|
|
|
crypto = data["crypto"]
|
|
kdfparams = crypto["kdfparams"]
|
|
salt = bytes.fromhex(kdfparams["salt"])
|
|
kdf = PBKDF2HMAC(
|
|
algorithm=hashes.SHA256(),
|
|
length=32,
|
|
salt=salt,
|
|
iterations=kdfparams["c"],
|
|
backend=default_backend()
|
|
)
|
|
key = kdf.derive(password.encode('utf-8'))
|
|
nonce = bytes.fromhex(crypto["cipherparams"]["nonce"])
|
|
ciphertext = bytes.fromhex(crypto["ciphertext"])
|
|
aesgcm = AESGCM(key)
|
|
private_bytes = aesgcm.decrypt(nonce, ciphertext, None)
|
|
# Verify it's ed25519
|
|
priv_key = ed25519.Ed25519PrivateKey.from_private_bytes(private_bytes)
|
|
return private_bytes
|
|
except Exception:
|
|
continue
|
|
return None
|
|
|
|
# Attempt to load proposer private key from keystore if not set
|
|
if not settings.proposer_key:
|
|
try:
|
|
pwd = _load_keystore_password()
|
|
key_bytes = _load_private_key_from_keystore(settings.keystore_path, pwd, target_address=settings.proposer_id)
|
|
if key_bytes:
|
|
# Encode as hex for easy storage; not yet used for signing
|
|
settings.proposer_key = key_bytes.hex()
|
|
logger.info("Loaded proposer private key from keystore", extra={"proposer_id": settings.proposer_id})
|
|
else:
|
|
logger.warning("Proposer private key not found in keystore; block signing disabled", extra={"proposer_id": settings.proposer_id})
|
|
except Exception as e:
|
|
logger.warning("Failed to load proposer key from keystore", extra={"error": str(e)})
|
|
|
|
|
|
class BlockchainNode:
|
|
def __init__(self) -> None:
|
|
self._stop_event = asyncio.Event()
|
|
self._proposers: dict[str, PoAProposer] = {}
|
|
|
|
async def _setup_gossip_subscribers(self) -> None:
|
|
# Transactions
|
|
tx_sub = await gossip_broker.subscribe("transactions")
|
|
|
|
async def process_txs():
|
|
from .mempool import get_mempool
|
|
mempool = get_mempool()
|
|
while True:
|
|
try:
|
|
tx_data = await tx_sub.queue.get()
|
|
if isinstance(tx_data, str):
|
|
import json
|
|
tx_data = json.loads(tx_data)
|
|
chain_id = tx_data.get("chain_id", settings.chain_id)
|
|
mempool.add(tx_data, chain_id=chain_id)
|
|
except Exception as exc:
|
|
logger.error(f"Error processing transaction from gossip: {exc}")
|
|
|
|
asyncio.create_task(process_txs())
|
|
|
|
# Blocks
|
|
block_sub = await gossip_broker.subscribe("blocks")
|
|
|
|
async def process_blocks():
|
|
while True:
|
|
try:
|
|
block_data = await block_sub.queue.get()
|
|
logger.info(f"Received block from gossip")
|
|
if isinstance(block_data, str):
|
|
import json
|
|
block_data = json.loads(block_data)
|
|
chain_id = block_data.get("chain_id", settings.chain_id)
|
|
logger.info(f"Importing block for chain {chain_id}: {block_data.get('height')}")
|
|
sync = ChainSync(session_factory=session_scope, chain_id=chain_id)
|
|
res = sync.import_block(block_data)
|
|
logger.info(f"Import result: accepted={res.accepted}, reason={res.reason}")
|
|
except Exception as exc:
|
|
logger.error(f"Error processing block from gossip: {exc}")
|
|
|
|
asyncio.create_task(process_blocks())
|
|
|
|
async def start(self) -> None:
|
|
logger.info("Starting blockchain node", extra={"supported_chains": getattr(settings, 'supported_chains', settings.chain_id)})
|
|
|
|
# Initialize Gossip Backend
|
|
backend = create_backend(
|
|
settings.gossip_backend,
|
|
broadcast_url=settings.gossip_broadcast_url,
|
|
)
|
|
await gossip_broker.set_backend(backend)
|
|
|
|
init_db()
|
|
init_mempool(
|
|
backend=settings.mempool_backend,
|
|
db_path=str(settings.db_path.parent / "mempool.db"),
|
|
max_size=settings.mempool_max_size,
|
|
min_fee=settings.min_fee,
|
|
)
|
|
# Start proposers only if enabled (followers set enable_block_production=False)
|
|
if getattr(settings, "enable_block_production", True):
|
|
self._start_proposers()
|
|
else:
|
|
logger.info("Block production disabled on this node", extra={"proposer_id": settings.proposer_id})
|
|
await self._setup_gossip_subscribers()
|
|
try:
|
|
await self._stop_event.wait()
|
|
finally:
|
|
await self._shutdown()
|
|
|
|
async def stop(self) -> None:
|
|
logger.info("Stopping blockchain node")
|
|
self._stop_event.set()
|
|
await self._shutdown()
|
|
|
|
def _start_proposers(self) -> None:
|
|
chains_str = getattr(settings, 'supported_chains', settings.chain_id)
|
|
chains = [c.strip() for c in chains_str.split(",") if c.strip()]
|
|
for chain_id in chains:
|
|
if chain_id in self._proposers:
|
|
continue
|
|
|
|
proposer_config = ProposerConfig(
|
|
chain_id=chain_id,
|
|
proposer_id=settings.proposer_id,
|
|
interval_seconds=settings.block_time_seconds,
|
|
max_block_size_bytes=settings.max_block_size_bytes,
|
|
max_txs_per_block=settings.max_txs_per_block,
|
|
)
|
|
|
|
proposer = PoAProposer(config=proposer_config, session_factory=session_scope)
|
|
self._proposers[chain_id] = proposer
|
|
asyncio.create_task(proposer.start())
|
|
|
|
async def _shutdown(self) -> None:
|
|
for chain_id, proposer in list(self._proposers.items()):
|
|
await proposer.stop()
|
|
self._proposers.clear()
|
|
await gossip_broker.shutdown()
|
|
|
|
|
|
@asynccontextmanager
|
|
async def node_app() -> asyncio.AbstractAsyncContextManager[BlockchainNode]: # type: ignore[override]
|
|
node = BlockchainNode()
|
|
try:
|
|
yield node
|
|
finally:
|
|
await node.stop()
|
|
|
|
|
|
def run() -> None:
|
|
asyncio.run(_run())
|
|
|
|
|
|
async def _run() -> None:
|
|
async with node_app() as node:
|
|
await node.start()
|
|
|
|
|
|
if __name__ == "__main__": # pragma: no cover
|
|
run()
|