144 lines
5.0 KiB
Python
144 lines
5.0 KiB
Python
# standard imports
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import logging
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# third-party imports
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import web3
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import celery
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from cic_registry.error import UnknownContractError
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from chainlib.status import Status as TxStatus
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from chainlib.eth.address import to_checksum
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from chainlib.eth.constant import ZERO_ADDRESS
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from hexathon import strip_0x
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# local imports
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from .base import SyncFilter
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from cic_eth.eth.token import (
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unpack_transfer,
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unpack_transferfrom,
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)
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from cic_eth.eth.account import unpack_gift
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from cic_eth.eth.token import ExtendedTx
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from .base import SyncFilter
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logg = logging.getLogger(__name__)
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transfer_method_signature = 'a9059cbb' # keccak256(transfer(address,uint256))
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transferfrom_method_signature = '23b872dd' # keccak256(transferFrom(address,address,uint256))
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giveto_method_signature = '63e4bff4' # keccak256(giveTo(address))
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class CallbackFilter(SyncFilter):
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trusted_addresses = []
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def __init__(self, chain_spec, method, queue):
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self.queue = queue
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self.method = method
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self.chain_spec = chain_spec
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def call_back(self, transfer_type, result):
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logg.debug('result {}'.format(result))
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s = celery.signature(
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self.method,
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[
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result,
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transfer_type,
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int(result['status_code'] == 0),
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],
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queue=self.queue,
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)
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# s_translate = celery.signature(
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# 'cic_eth.ext.address.translate',
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# [
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# result,
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# self.trusted_addresses,
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# chain_str,
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# ],
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# queue=self.queue,
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# )
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# s_translate.link(s)
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# s_translate.apply_async()
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t = s.apply_async()
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return s
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def parse_data(self, tx):
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transfer_type = None
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transfer_data = None
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logg.debug('have payload {}'.format(tx.payload))
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method_signature = tx.payload[:8]
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logg.debug('tx status {}'.format(tx.status))
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if method_signature == transfer_method_signature:
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transfer_data = unpack_transfer(tx.payload)
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transfer_data['from'] = tx['from']
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transfer_data['token_address'] = tx['to']
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elif method_signature == transferfrom_method_signature:
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transfer_type = 'transferfrom'
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transfer_data = unpack_transferfrom(tx.payload)
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transfer_data['token_address'] = tx['to']
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# TODO: do not rely on logs here
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elif method_signature == giveto_method_signature:
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transfer_type = 'tokengift'
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transfer_data = unpack_gift(tx.payload)
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transfer_data['from'] = tx.inputs[0]
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transfer_data['value'] = 0
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transfer_data['token_address'] = ZERO_ADDRESS
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for l in tx.logs:
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topics = l['topics']
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logg.debug('topixx {}'.format(topics))
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if strip_0x(topics[0]) == '45c201a59ac545000ead84f30b2db67da23353aa1d58ac522c48505412143ffa':
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transfer_data['value'] = web3.Web3.toInt(hexstr=strip_0x(l['data']))
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#token_address_bytes = topics[2][32-20:]
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token_address = strip_0x(topics[2])[64-40:]
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transfer_data['token_address'] = to_checksum(token_address)
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logg.debug('resolved method {}'.format(transfer_type))
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if transfer_data != None:
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transfer_data['status'] = tx.status
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return (transfer_type, transfer_data)
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def filter(self, conn, block, tx, db_session=None):
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chain_str = str(self.chain_spec)
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transfer_data = None
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transfer_type = None
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try:
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(transfer_type, transfer_data) = self.parse_data(tx)
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except TypeError:
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logg.debug('invalid method data length for tx {}'.format(tx.hash))
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return
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if len(tx.payload) < 8:
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logg.debug('callbacks filter data length not sufficient for method signature in tx {}, skipping'.format(tx.hash))
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return
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logg.debug('checking callbacks filter input {}'.format(tx.payload[:8]))
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if transfer_data != None:
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logg.debug('wtfoo {}'.format(transfer_data))
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token_symbol = None
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result = None
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try:
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tokentx = ExtendedTx(tx.hash, self.chain_spec)
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tokentx.set_actors(transfer_data['from'], transfer_data['to'], self.trusted_addresses)
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tokentx.set_tokens(transfer_data['token_address'], transfer_data['value'])
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if transfer_data['status'] == 0:
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tokentx.set_status(1)
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else:
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tokentx.set_status(0)
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t = self.call_back(transfer_type, tokentx.to_dict())
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logg.info('callback success task id {} tx {}'.format(t, tx.hash))
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except UnknownContractError:
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logg.debug('callback filter {}:{} skipping "transfer" method on unknown contract {} tx {}'.format(tc.queue, tc.method, transfer_data['to'], tx.hash))
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def __str__(self):
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return 'cic-eth callbacks'
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