cic-stack/apps/contract-migration/scripts/local/transfer.py

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2021-02-21 16:41:37 +01:00
# standard imports
import logging
import random
# external imports
from cic_eth.api.api_task import Api
logging.basicConfig(level=logging.WARNING)
logg = logging.getLogger()
queue = 'cic-eth'
name = 'erc20_transfer'
def do(token_pair, sender, recipient, sender_balance, aux, block_number, tx_index):
"""Triggers an ERC20 token transfer through the custodial cic-eth component, with a randomly chosen amount in integer resolution.
It expects the following aux parameters to exist:
- redis_host_callback: Redis host name exposed to cic-eth, for callback
- redis_port_callback: Redis port exposed to cic-eth, for callback
- redis_db: Redis db, for callback
- redis_channel: Redis channel, for callback
- chain_spec: Chain specification for the chain to execute the transfer on
See local.noop.do for details on parameters and return values.
"""
logg.debug('running {} {} {} {}'.format(__name__, token_pair, sender, recipient))
decimals = token_pair[0].decimals()
sender_balance_value = sender_balance['balance_network'] - sender_balance['balance_outgoing']
balance_units = int(sender_balance_value / decimals)
if balance_units <= 0:
return (AttributeError('sender {} has zero balance'), None, 0,)
spend_units = random.randint(1, balance_units)
spend_value = spend_units * decimals
api = Api(
str(aux['chain_spec']),
queue=queue,
callback_param='{}:{}:{}:{}'.format(aux['redis_host_callback'], aux['redis_port_callback'], aux['redis_db'], aux['redis_channel']),
callback_task='cic_eth.callbacks.redis.redis',
callback_queue=queue,
)
t = api.transfer(sender, recipient, spend_value, token_pair[0].symbol())
sender_balance['balance_outgoing'] += spend_value
return (None, t, sender_balance,)