74e5a880b0
- Add info logs for gossip subscriber setup start and completion - Add try-except blocks around transactions and blocks topic subscriptions - Add success logs after each subscription - Add error logs with exception details if subscription fails - Add early return if subscription fails to prevent further processing - Add logging for gossip backend initialization with backend type and URL - Add success log after gossip backend initialization compl
227 lines
8.8 KiB
Python
Executable File
227 lines
8.8 KiB
Python
Executable File
from __future__ import annotations
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import asyncio
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import json
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import os
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from contextlib import asynccontextmanager
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from pathlib import Path
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from typing import Optional
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from .config import settings
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from .consensus import PoAProposer, ProposerConfig, CircuitBreaker
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from .database import init_db, session_scope
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from .logger import get_logger
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from .gossip import gossip_broker, create_backend
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from .sync import ChainSync
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from .mempool import init_mempool
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logger = get_logger(__name__)
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def _load_keystore_password() -> str:
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"""Load keystore password from file or environment."""
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pwd_file = settings.keystore_password_file
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if pwd_file.exists():
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return pwd_file.read_text().strip()
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env_pwd = os.getenv("KEYSTORE_PASSWORD")
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if env_pwd:
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return env_pwd
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raise RuntimeError(f"Keystore password not found. Set in {pwd_file} or KEYSTORE_PASSWORD env.")
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def _load_private_key_from_keystore(keystore_dir: Path, password: str, target_address: Optional[str] = None) -> Optional[bytes]:
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"""Load an ed25519 private key from the keystore.
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If target_address is given, find the keystore file with matching address.
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Otherwise, return the first key found.
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"""
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if not keystore_dir.exists():
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return None
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for kf in keystore_dir.glob("*.json"):
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try:
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with open(kf) as f:
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data = json.load(f)
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addr = data.get("address")
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if target_address and addr != target_address:
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continue
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# Decrypt
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from cryptography.hazmat.primitives.asymmetric import ed25519
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from cryptography.hazmat.primitives.kdf.pbkdf2 import PBKDF2HMAC
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from cryptography.hazmat.primitives import hashes
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from cryptography.hazmat.primitives.ciphers.aead import AESGCM
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from cryptography.hazmat.backends import default_backend
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crypto = data["crypto"]
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kdfparams = crypto["kdfparams"]
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salt = bytes.fromhex(kdfparams["salt"])
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kdf = PBKDF2HMAC(
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algorithm=hashes.SHA256(),
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length=32,
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salt=salt,
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iterations=kdfparams["c"],
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backend=default_backend()
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)
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key = kdf.derive(password.encode('utf-8'))
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nonce = bytes.fromhex(crypto["cipherparams"]["nonce"])
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ciphertext = bytes.fromhex(crypto["ciphertext"])
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aesgcm = AESGCM(key)
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private_bytes = aesgcm.decrypt(nonce, ciphertext, None)
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# Verify it's ed25519
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priv_key = ed25519.Ed25519PrivateKey.from_private_bytes(private_bytes)
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return private_bytes
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except Exception:
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continue
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return None
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# Attempt to load proposer private key from keystore if not set
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if not settings.proposer_key:
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try:
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pwd = _load_keystore_password()
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key_bytes = _load_private_key_from_keystore(settings.keystore_path, pwd, target_address=settings.proposer_id)
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if key_bytes:
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# Encode as hex for easy storage; not yet used for signing
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settings.proposer_key = key_bytes.hex()
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logger.info("Loaded proposer private key from keystore", extra={"proposer_id": settings.proposer_id})
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else:
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logger.warning("Proposer private key not found in keystore; block signing disabled", extra={"proposer_id": settings.proposer_id})
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except Exception as e:
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logger.warning("Failed to load proposer key from keystore", extra={"error": str(e)})
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class BlockchainNode:
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def __init__(self) -> None:
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self._stop_event = asyncio.Event()
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self._proposers: dict[str, PoAProposer] = {}
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async def _setup_gossip_subscribers(self) -> None:
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logger.info("Setting up gossip subscribers")
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# Transactions
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try:
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tx_sub = await gossip_broker.subscribe("transactions")
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logger.info("Successfully subscribed to transactions topic")
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except Exception as e:
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logger.error(f"Failed to subscribe to transactions: {e}")
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return
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async def process_txs():
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from .mempool import get_mempool
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mempool = get_mempool()
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while True:
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try:
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tx_data = await tx_sub.queue.get()
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if isinstance(tx_data, str):
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import json
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tx_data = json.loads(tx_data)
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chain_id = tx_data.get("chain_id", settings.chain_id)
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mempool.add(tx_data, chain_id=chain_id)
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except Exception as exc:
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logger.error(f"Error processing transaction from gossip: {exc}")
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asyncio.create_task(process_txs())
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# Blocks
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try:
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block_sub = await gossip_broker.subscribe("blocks")
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logger.info("Successfully subscribed to blocks topic")
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except Exception as e:
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logger.error(f"Failed to subscribe to blocks: {e}")
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return
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async def process_blocks():
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while True:
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try:
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block_data = await block_sub.queue.get()
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logger.info(f"Received block from gossip")
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if isinstance(block_data, str):
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import json
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block_data = json.loads(block_data)
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chain_id = block_data.get("chain_id", settings.chain_id)
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logger.info(f"Importing block for chain {chain_id}: {block_data.get('height')}")
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sync = ChainSync(session_factory=session_scope, chain_id=chain_id)
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res = sync.import_block(block_data, transactions=block_data.get("transactions"))
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logger.info(f"Import result: accepted={res.accepted}, reason={res.reason}")
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except Exception as exc:
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logger.error(f"Error processing block from gossip: {exc}")
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asyncio.create_task(process_blocks())
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logger.info("Gossip subscribers setup completed")
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async def start(self) -> None:
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logger.info("Starting blockchain node", extra={"supported_chains": getattr(settings, 'supported_chains', settings.chain_id)})
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# Initialize Gossip Backend
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backend = create_backend(
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settings.gossip_backend,
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broadcast_url=settings.gossip_broadcast_url,
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)
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logger.info(f"Initializing gossip backend: {settings.gossip_backend}, url: {settings.gossip_broadcast_url}")
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await gossip_broker.set_backend(backend)
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logger.info("Gossip backend initialized successfully")
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init_db()
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init_mempool(
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backend=settings.mempool_backend,
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db_path=str(settings.db_path.parent / "mempool.db"),
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max_size=settings.mempool_max_size,
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min_fee=settings.min_fee,
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)
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# Start proposers only if enabled (followers set enable_block_production=False)
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if getattr(settings, "enable_block_production", True):
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self._start_proposers()
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else:
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logger.info("Block production disabled on this node", extra={"proposer_id": settings.proposer_id})
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await self._setup_gossip_subscribers()
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try:
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await self._stop_event.wait()
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finally:
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await self._shutdown()
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async def stop(self) -> None:
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logger.info("Stopping blockchain node")
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self._stop_event.set()
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await self._shutdown()
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def _start_proposers(self) -> None:
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chains_str = getattr(settings, 'supported_chains', settings.chain_id)
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chains = [c.strip() for c in chains_str.split(",") if c.strip()]
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for chain_id in chains:
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if chain_id in self._proposers:
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continue
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proposer_config = ProposerConfig(
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chain_id=chain_id,
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proposer_id=settings.proposer_id,
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interval_seconds=settings.block_time_seconds,
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max_block_size_bytes=settings.max_block_size_bytes,
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max_txs_per_block=settings.max_txs_per_block,
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)
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proposer = PoAProposer(config=proposer_config, session_factory=session_scope)
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self._proposers[chain_id] = proposer
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asyncio.create_task(proposer.start())
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async def _shutdown(self) -> None:
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for chain_id, proposer in list(self._proposers.items()):
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await proposer.stop()
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self._proposers.clear()
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await gossip_broker.shutdown()
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@asynccontextmanager
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async def node_app() -> asyncio.AbstractAsyncContextManager[BlockchainNode]: # type: ignore[override]
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node = BlockchainNode()
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try:
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yield node
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finally:
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await node.stop()
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def run() -> None:
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asyncio.run(_run())
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async def _run() -> None:
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async with node_app() as node:
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await node.start()
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if __name__ == "__main__": # pragma: no cover
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run()
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