cic-stack/apps/cic-cache/cic_cache/runnable/daemons/tracker.py

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# standard imports
import os
import sys
import logging
import time
import argparse
import sys
import re
# external imports
import sqlalchemy
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from cic_eth_registry import CICRegistry
from cic_eth_registry.error import UnknownContractError
from chainlib.chain import ChainSpec
from chainlib.eth.constant import ZERO_ADDRESS
from chainlib.connection import RPCConnection
from chainlib.eth.block import (
block_latest,
)
from hexathon import (
strip_0x,
)
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from chainsyncer.backend.sql import SQLBackend
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from chainsyncer.driver.head import HeadSyncer
from chainsyncer.driver.history import HistorySyncer
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from chainsyncer.db.models.base import SessionBase
# local imports
import cic_cache.cli
from cic_cache.db import (
dsn_from_config,
add_tag,
)
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from cic_cache.runnable.daemons.filters import (
ERC20TransferFilter,
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FaucetFilter,
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)
logging.basicConfig(level=logging.WARNING)
logg = logging.getLogger()
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# process args
arg_flags = cic_cache.cli.argflag_std_read
local_arg_flags = cic_cache.cli.argflag_local_sync
argparser = cic_cache.cli.ArgumentParser(arg_flags)
argparser.process_local_flags(local_arg_flags)
args = argparser.parse_args()
# process config
config = cic_cache.cli.Config.from_args(args, arg_flags, local_arg_flags)
# connect to database
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dsn = dsn_from_config(config)
SessionBase.connect(dsn, debug=config.true('DATABASE_DEBUG'))
# set up rpc
rpc = cic_cache.cli.RPC.from_config(config)
conn = rpc.get_default()
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# set up chain provisions
chain_spec = ChainSpec.from_chain_str(config.get('CHAIN_SPEC'))
registry = None
try:
registry = cic_cache.cli.connect_registry(conn, chain_spec, config.get('CIC_REGISTRY_ADDRESS'))
except UnknownContractError as e:
logg.exception('Registry contract connection failed for {}: {}'.format(config.get('CIC_REGISTRY_ADDRESS'), e))
sys.exit(1)
logg.info('connected contract registry {}'.format(config.get('CIC_REGISTRY_ADDRESS')))
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def register_filter_tags(filters, session):
for f in filters:
tag = f.tag()
try:
add_tag(session, tag[0], domain=tag[1])
session.commit()
logg.info('added tag name "{}" domain "{}"'.format(tag[0], tag[1]))
except sqlalchemy.exc.IntegrityError:
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session.rollback()
logg.debug('already have tag name "{}" domain "{}"'.format(tag[0], tag[1]))
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def main():
# Connect to blockchain with chainlib
rpc = RPCConnection.connect(chain_spec, 'default')
o = block_latest()
r = rpc.do(o)
block_offset = int(strip_0x(r), 16) + 1
logg.debug('current block height {}'.format(block_offset))
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syncers = []
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syncer_backends = SQLBackend.resume(chain_spec, block_offset)
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if len(syncer_backends) == 0:
initial_block_start = config.get('SYNCER_OFFSET')
initial_block_offset = block_offset
if config.get('SYNCER_NO_HISTORY'):
initial_block_start = block_offset
initial_block_offset += 1
syncer_backends.append(SQLBackend.initial(chain_spec, initial_block_offset, start_block_height=initial_block_start))
logg.info('found no backends to resume, adding initial sync from history start {} end {}'.format(initial_block_start, initial_block_offset))
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else:
for syncer_backend in syncer_backends:
logg.info('resuming sync session {}'.format(syncer_backend))
for syncer_backend in syncer_backends:
syncers.append(HistorySyncer(syncer_backend, cic_cache.cli.chain_interface))
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syncer_backend = SQLBackend.live(chain_spec, block_offset+1)
syncers.append(HeadSyncer(syncer_backend, cic_cache.cli.chain_interface))
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trusted_addresses_src = config.get('CIC_TRUST_ADDRESS')
if trusted_addresses_src == None:
logg.critical('At least one trusted address must be declared in CIC_TRUST_ADDRESS')
sys.exit(1)
trusted_addresses = trusted_addresses_src.split(',')
for address in trusted_addresses:
logg.info('using trusted address {}'.format(address))
erc20_transfer_filter = ERC20TransferFilter(chain_spec)
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faucet_filter = FaucetFilter(chain_spec)
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filters = [
erc20_transfer_filter,
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faucet_filter,
]
session = SessionBase.create_session()
register_filter_tags(filters, session)
session.close()
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i = 0
for syncer in syncers:
logg.debug('running syncer index {}'.format(i))
for f in filters:
syncer.add_filter(f)
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r = syncer.loop(int(config.get('SYNCER_LOOP_INTERVAL')), rpc)
sys.stderr.write("sync {} done at block {}\n".format(syncer, r))
i += 1
if __name__ == '__main__':
main()