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fix(sync): resolve multi-chain gossip block propagation and sync across nodes

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This commit is contained in:
oib
2026-03-03 19:39:52 +01:00
parent abe13d065f
commit 0ebac91f45
4 changed files with 93 additions and 6 deletions
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2
apps/blockchain-node/src/aitbc_chain/consensus/poa.py
View File

@@ -174,6 +174,7 @@ class PoAProposer:
await gossip_broker.publish(
"blocks",
{
"chain_id": self._config.chain_id,
"height": block.height,
"hash": block.hash,
"parent_hash": block.parent_hash,
@@ -210,6 +211,7 @@ class PoAProposer:
await gossip_broker.publish(
"blocks",
{
"chain_id": self._config.chain_id,
"height": genesis.height,
"hash": genesis.hash,
"parent_hash": genesis.parent_hash,

53
apps/blockchain-node/src/aitbc_chain/main.py
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@@ -8,6 +8,8 @@ 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__)
@@ -18,8 +20,57 @@ class BlockchainNode:
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", "ait-devnet")
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", "ait-devnet")
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,
@@ -28,6 +79,7 @@ class BlockchainNode:
min_fee=settings.min_fee,
)
self._start_proposers()
await self._setup_gossip_subscribers()
try:
await self._stop_event.wait()
finally:
@@ -61,6 +113,7 @@ class BlockchainNode:
for chain_id, proposer in list(self._proposers.items()):
await proposer.stop()
self._proposers.clear()
await gossip_broker.shutdown()
@asynccontextmanager

13
dev/scripts/create_genesis_all.py
View File

@@ -10,7 +10,7 @@ from datetime import datetime
import hashlib
def compute_block_hash(chain_id: str, height: int, parent_hash: str, timestamp: datetime) -> str:
data = f"{chain_id}{height}{parent_hash}{timestamp}".encode()
data = f"{chain_id}{height}{parent_hash}{timestamp.isoformat()}".encode()
return "0x" + hashlib.sha256(data).hexdigest()
def create_genesis(chain_id: str):
@@ -19,17 +19,18 @@ def create_genesis(chain_id: str):
with session_scope() as session:
existing = session.exec(select(Block).where(Block.chain_id == chain_id).order_by(Block.height.desc()).limit(1)).first()
if existing:
print(f"Genesis block already exists for {chain_id}: #{existing.height}")
print(f"Genesis block already exists for {chain_id}: #{existing.height} (hash: {existing.hash})")
return
timestamp = datetime.utcnow()
# Use a deterministic timestamp so all nodes agree on the hash
timestamp = datetime(2025, 1, 1, 0, 0, 0)
genesis_hash = compute_block_hash(chain_id, 0, "0x00", timestamp)
genesis = Block(
chain_id=chain_id,
height=0,
hash=genesis_hash,
parent_hash="0x00",
proposer=f"{chain_id}-proposer",
proposer="genesis",
timestamp=timestamp,
tx_count=0,
state_root=None,
@@ -39,9 +40,9 @@ def create_genesis(chain_id: str):
print(f"Genesis block created for {chain_id}: #{genesis.height}")
print(f"Hash: {genesis.hash}")
print(f"Proposer: {genesis.proposer}")
print(f"Timestamp: {genesis.timestamp}")
print(f"Timestamp: {genesis.timestamp.isoformat()}")
if __name__ == "__main__":
init_db()
for chain in ["ait-testnet", "ait-devnet"]:
for chain in ["ait-testnet", "ait-devnet", "ait-healthchain"]:
create_genesis(chain)

31
dev/tests/test_sync.py Normal file
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@@ -0,0 +1,31 @@
import asyncio
import httpx
import time
async def main():
async with httpx.AsyncClient() as client:
print("Submitting transaction to aitbc (testnet)...")
tx_data = {
"type": "transfer",
"sender": "0xTEST_SENDER",
"nonce": int(time.time()),
"fee": 1,
"payload": {"amount": 100, "recipient": "0xTEST_RECIPIENT"},
"sig": "0xSIG"
}
resp = await client.post("http://10.1.223.93:8082/rpc/sendTx?chain_id=ait-testnet", json=tx_data)
print("aitbc response:", resp.status_code, resp.text)
print("Waiting 5 seconds for gossip propagation and block proposing...")
await asyncio.sleep(5)
print("Checking head on aitbc...")
resp = await client.get("http://10.1.223.93:8082/rpc/head?chain_id=ait-testnet")
print("aitbc head:", resp.status_code, resp.json())
print("Checking head on aitbc1...")
resp = await client.get("http://10.1.223.40:8082/rpc/head?chain_id=ait-testnet")
print("aitbc1 head:", resp.status_code, resp.json())
if __name__ == "__main__":
asyncio.run(main())