cic-stack/apps/cic-eth/cic_eth/sync/retry.py

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# standard imports
import logging
import datetime
# external imports
from chainsyncer.driver.head import HeadSyncer
2021-04-15 18:04:47 +02:00
from chainsyncer.backend.memory import MemBackend
from chainsyncer.error import NoBlockForYou
from chainlib.eth.block import (
block_by_number,
block_latest,
Block,
)
from chainlib.eth.tx import (
unpack,
Tx,
)
from cic_eth.queue.query import get_status_tx
from chainqueue.db.enum import StatusBits
from hexathon import strip_0x
# local imports
from cic_eth.db import SessionBase
logg = logging.getLogger()
class DbSessionMemBackend(MemBackend):
def connect(self):
self.db_session = SessionBase.create_session()
return self.db_session
def disconnect(self):
self.db_session.close()
self.db_session = None
class RetrySyncer(HeadSyncer):
def __init__(self, conn, chain_spec, chain_interface, stalled_grace_seconds, batch_size=50, failed_grace_seconds=None):
backend = DbSessionMemBackend(chain_spec, None)
super(RetrySyncer, self).__init__(backend, chain_interface)
self.chain_spec = chain_spec
if failed_grace_seconds == None:
failed_grace_seconds = stalled_grace_seconds
self.stalled_grace_seconds = stalled_grace_seconds
self.failed_grace_seconds = failed_grace_seconds
self.batch_size = batch_size
self.conn = conn
def get(self, conn):
o = block_latest()
r = conn.do(o)
(pair, flags) = self.backend.get()
n = int(r, 16)
if n == pair[0]:
raise NoBlockForYou('block {} already checked'.format(n))
o = block_by_number(n)
r = conn.do(o)
b = Block(r)
return b
def process(self, conn, block):
before = datetime.datetime.utcnow() - datetime.timedelta(seconds=self.stalled_grace_seconds)
session = SessionBase.create_session()
stalled_txs = get_status_tx(
self.chain_spec,
StatusBits.IN_NETWORK.value,
not_status=StatusBits.FINAL | StatusBits.MANUAL | StatusBits.OBSOLETE,
before=before,
limit=self.batch_size,
session=session,
)
session.close()
# stalled_txs = get_upcoming_tx(
# status=StatusBits.IN_NETWORK.value,
# not_status=StatusBits.FINAL | StatusBits.MANUAL | StatusBits.OBSOLETE,
# before=before,
# limit=self.batch_size,
# )
for tx_signed_raw_hex in stalled_txs.values():
tx_signed_raw_bytes = bytes.fromhex(strip_0x(tx_signed_raw_hex))
tx_src = unpack(tx_signed_raw_bytes, self.chain_spec)
tx = Tx(tx_src)
self.filter.apply(self.conn, block, tx)
self.backend.set(block.number, 0)