2021-02-21 16:41:37 +01:00
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# standard imports
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import logging
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import random
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# external imports
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from cic_eth.api.api_task import Api
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logging.basicConfig(level=logging.WARNING)
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logg = logging.getLogger()
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queue = 'cic-eth'
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name = 'erc20_transfer'
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2021-05-20 23:25:14 +02:00
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def do(token_pair, sender, recipient, sender_balance, aux, block_number):
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2021-02-21 16:41:37 +01:00
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"""Triggers an ERC20 token transfer through the custodial cic-eth component, with a randomly chosen amount in integer resolution.
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It expects the following aux parameters to exist:
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- redis_host_callback: Redis host name exposed to cic-eth, for callback
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- redis_port_callback: Redis port exposed to cic-eth, for callback
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- redis_db: Redis db, for callback
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- redis_channel: Redis channel, for callback
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- chain_spec: Chain specification for the chain to execute the transfer on
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See local.noop.do for details on parameters and return values.
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"""
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logg.debug('running {} {} {} {}'.format(__name__, token_pair, sender, recipient))
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decimals = token_pair[0].decimals()
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sender_balance_value = sender_balance['balance_network'] - sender_balance['balance_outgoing']
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balance_units = int(sender_balance_value / decimals)
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if balance_units <= 0:
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2021-05-20 23:25:14 +02:00
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return (AttributeError('sender {} has zero balance ({} / {})'.format(sender, sender_balance_value, decimals)), None, 0,)
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2021-02-21 16:41:37 +01:00
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spend_units = random.randint(1, balance_units)
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spend_value = spend_units * decimals
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api = Api(
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str(aux['chain_spec']),
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queue=queue,
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callback_param='{}:{}:{}:{}'.format(aux['redis_host_callback'], aux['redis_port_callback'], aux['redis_db'], aux['redis_channel']),
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callback_task='cic_eth.callbacks.redis.redis',
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callback_queue=queue,
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)
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t = api.transfer(sender, recipient, spend_value, token_pair[0].symbol())
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sender_balance['balance_outgoing'] += spend_value
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return (None, t, sender_balance,)
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