eth-erc20/python/eth_erc20/runnable/balance.py

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#!python3
"""Token balance query script
.. moduleauthor:: Louis Holbrook <dev@holbrook.no>
.. pgp:: 0826EDA1702D1E87C6E2875121D2E7BB88C2A746
"""
# SPDX-License-Identifier: GPL-3.0-or-later
# standard imports
import sys
import os
import json
import argparse
import logging
# external imports
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from hexathon import (
add_0x,
strip_0x,
even,
)
import sha3
# external imports
import chainlib.eth.cli
from chainlib.eth.cli.arg import (
Arg,
ArgFlag,
process_args,
)
from chainlib.eth.cli.config import (
Config,
process_config,
)
from chainlib.eth.address import to_checksum_address
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from chainlib.eth.connection import EthHTTPConnection
from chainlib.eth.gas import (
OverrideGasOracle,
balance,
)
from chainlib.chain import ChainSpec
from chainlib.eth.cli.log import process_log
from chainlib.eth.settings import process_settings
from chainlib.settings import ChainSettings
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# local imports
from eth_erc20 import ERC20
def process_config_local(config, arg, args, flags):
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recipient = None
address = config.get('_POSARG')
if address:
recipient = add_0x(address)
else:
recipient = stdin_arg()
config.add(recipient, '_RECIPIENT', False)
return config
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logg = logging.getLogger()
arg_flags = ArgFlag()
arg = Arg(arg_flags)
flags = arg_flags.STD_READ | arg_flags.EXEC | arg_flags.SENDER
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argparser = chainlib.eth.cli.ArgumentParser()
argparser = process_args(argparser, arg, flags)
argparser.add_argument('address', type=str, help='Ethereum address of recipient')
args = argparser.parse_args()
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logg = process_log(args, logg)
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config = Config()
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config = process_config(config, arg, args, flags, positional_name='address')
config = process_config_local(config, arg, args, flags)
logg.debug('config loaded:\n{}'.format(config))
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settings = ChainSettings()
settings = process_settings(settings, config)
logg.debug('settings loaded:\n{}'.format(settings))
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def main():
token_address = settings.get('EXEC')
conn = settings.get('CONN')
sender_address = settings.get('SENDER_ADDRESS')
g = ERC20(
chain_spec=settings.get('CHAIN_SPEC'),
gas_oracle=settings.get('GAS_ORACLE'),
)
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# determine decimals
decimals_o = g.decimals(token_address, sender_address=sender_address)
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r = conn.do(decimals_o)
decimals = int(strip_0x(r), 16)
logg.info('decimals {}'.format(decimals))
name_o = g.name(token_address, sender_address=sender_address)
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r = conn.do(name_o)
token_name = g.parse_name(r)
logg.info('name {}'.format(token_name))
symbol_o = g.symbol(token_address, sender_address=sender_address)
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r = conn.do(symbol_o)
token_symbol = g.parse_symbol(r)
logg.info('symbol {}'.format(token_symbol))
# get balance
balance_o = g.balance(token_address, settings.get('RECIPIENT'), sender_address=sender_address)
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r = conn.do(balance_o)
hx = strip_0x(r)
balance_value = int(hx, 16)
logg.debug('balance {} = {} decimals {}'.format(even(hx), balance_value, decimals))
balance_str = str(balance_value)
balance_len = len(balance_str)
if config.get('_RAW'):
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print(balance_str)
else:
if balance_len < decimals + 1:
print('0.{}'.format(balance_str.zfill(decimals)))
else:
offset = balance_len-decimals
print('{}.{}'.format(balance_str[:offset],balance_str[offset:]))
if __name__ == '__main__':
main()