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# standard imports
import os
import sys
import logging
import time
import argparse
import sys
import re
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# external imports
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import confini
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from chainlib . eth . connection import HTTPConnection
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from chainlib . eth . block import block_latest
from chainlib . chain import ChainSpec
# local imports
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from chainsyncer . driver import HeadSyncer
from chainsyncer . db import dsn_from_config
from chainsyncer . db . models . base import SessionBase
from chainsyncer . backend import SyncerBackend
from chainsyncer . error import LoopDone
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from chainsyncer . filter import NoopFilter
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logging . basicConfig ( level = logging . WARNING )
logg = logging . getLogger ( )
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config_dir = ' /usr/local/etc/cic-syncer '
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argparser = argparse . ArgumentParser ( description = ' daemon that monitors transactions in new blocks ' )
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argparser . add_argument ( ' -p ' , ' --provider ' , dest = ' p ' , type = str , help = ' chain rpc provider address ' )
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argparser . add_argument ( ' -c ' , type = str , default = config_dir , help = ' config root to use ' )
argparser . add_argument ( ' -i ' , ' --chain-spec ' , type = str , dest = ' i ' , help = ' chain spec ' )
argparser . add_argument ( ' --env-prefix ' , default = os . environ . get ( ' CONFINI_ENV_PREFIX ' ) , dest = ' env_prefix ' , type = str , help = ' environment prefix for variables to overwrite configuration ' )
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argparser . add_argument ( ' --offset ' , type = int , help = ' block number to start sync ' )
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argparser . add_argument ( ' -q ' , type = str , default = ' cic-eth ' , help = ' celery queue to submit transaction tasks to ' )
argparser . add_argument ( ' -v ' , help = ' be verbose ' , action = ' store_true ' )
argparser . add_argument ( ' -vv ' , help = ' be more verbose ' , action = ' store_true ' )
args = argparser . parse_args ( sys . argv [ 1 : ] )
if args . v == True :
logging . getLogger ( ) . setLevel ( logging . INFO )
elif args . vv == True :
logging . getLogger ( ) . setLevel ( logging . DEBUG )
config_dir = os . path . join ( args . c )
config = confini . Config ( config_dir , args . env_prefix )
config . process ( )
# override args
args_override = {
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' SYNCER_CHAIN_SPEC ' : getattr ( args , ' i ' ) ,
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' ETH_PROVIDER ' : getattr ( args , ' p ' ) ,
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}
config . dict_override ( args_override , ' cli flag ' )
config . censor ( ' PASSWORD ' , ' DATABASE ' )
config . censor ( ' PASSWORD ' , ' SSL ' )
logg . debug ( ' config loaded from {} : \n {} ' . format ( config_dir , config ) )
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#app = celery.Celery(backend=config.get('CELERY_RESULT_URL'), broker=config.get('CELERY_BROKER_URL'))
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queue = args . q
dsn = dsn_from_config ( config )
SessionBase . connect ( dsn )
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conn = HTTPConnection ( config . get ( ' ETH_PROVIDER ' ) )
chain = ChainSpec . from_chain_str ( config . get ( ' SYNCER_CHAIN_SPEC ' ) )
block_offset = args . offset
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def main ( ) :
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global block_offset
if block_offset == None :
o = block_latest ( )
r = conn . do ( o )
block_offset = r [ 1 ]
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syncer_backend = SyncerBackend . live ( chain , 0 )
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syncer = HeadSyncer ( syncer_backend )
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fltr = NoopFilter ( )
syncer . add_filter ( fltr )
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try :
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logg . debug ( ' block offset {} ' . format ( block_offset ) )
syncer . loop ( int ( config . get ( ' SYNCER_LOOP_INTERVAL ' ) ) , conn )
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except LoopDone as e :
sys . stderr . write ( " sync ' {} ' done at block {} \n " . format ( args . mode , e ) )
sys . exit ( 0 )
if __name__ == ' __main__ ' :
main ( )