Add approve runable

python/eth_erc20/runnable/approve.py

@@ -0,0 +1,99 @@
+#!python3
+
+"""Token transfer script
+
+.. moduleauthor:: Louis Holbrook <dev@holbrook.no>
+.. pgp:: 0826EDA1702D1E87C6E2875121D2E7BB88C2A746 
+
+"""
+
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+# standard imports
+import os
+import io
+import json
+import argparse
+import logging
+
+# external imports
+from hexathon import (
+        add_0x,
+        strip_0x,
+        )
+from chainlib.eth.connection import EthHTTPConnection
+from chainlib.chain import ChainSpec
+from chainlib.eth.runnable.util import decode_for_puny_humans
+from chainlib.eth.address import to_checksum_address
+import chainlib.eth.cli
+
+# local imports
+from eth_erc20 import ERC20
+
+logging.basicConfig(level=logging.WARNING)
+logg = logging.getLogger()
+
+arg_flags = chainlib.eth.cli.argflag_std_write | chainlib.eth.cli.Flag.EXEC | chainlib.eth.cli.Flag.WALLET 
+argparser = chainlib.eth.cli.ArgumentParser(arg_flags)
+argparser.add_positional('amount', type=int, help='Token amount to send')
+args = argparser.parse_args()
+extra_args = {
+    'amount': None,
+        }
+config = chainlib.eth.cli.Config.from_args(args, arg_flags, extra_args=extra_args, default_fee_limit=100000)
+
+block_all = args.ww
+block_last = args.w or block_all
+
+wallet = chainlib.eth.cli.Wallet()
+wallet.from_config(config)
+
+rpc = chainlib.eth.cli.Rpc(wallet=wallet)
+conn = rpc.connect_by_config(config)
+
+chain_spec = ChainSpec.from_chain_str(config.get('CHAIN_SPEC'))
+
+value = config.get('_AMOUNT')
+
+send = config.true('_RPC_SEND')
+
+def main():
+
+    signer = rpc.get_signer()
+    signer_address = rpc.get_sender_address()
+
+    gas_oracle = rpc.get_gas_oracle()
+    nonce_oracle = rpc.get_nonce_oracle()
+
+    g = ERC20(chain_spec, signer=signer, gas_oracle=gas_oracle, nonce_oracle=nonce_oracle)
+
+    recipient = to_checksum_address(config.get('_RECIPIENT'))
+    if not config.true('_UNSAFE') and recipient != add_0x(config.get('_RECIPIENT')):
+        raise ValueError('invalid checksum address for recipient')
+
+    token_address = to_checksum_address(config.get('_EXEC_ADDRESS'))
+    if not config.true('_UNSAFE') and token_address != add_0x(config.get('_EXEC_ADDRESS')):
+        raise ValueError('invalid checksum address for contract')
+
+    (tx_hash_hex, o) = g.approve(token_address, signer_address, recipient, value, id_generator=rpc.id_generator)
+
+    if send:
+        conn.do(o)
+        if block_last:
+            r = conn.wait(tx_hash_hex)
+            if logg.isEnabledFor(logging.DEBUG):
+                sender_balance = balance(g, token_address, signer_address, id_generator=rpc.id_generator)
+                recipient_balance = balance(g, token_address, recipient, id_generator=rpc.id_generator)
+                logg.debug('sender {} balance after: {}'.format(signer_address, sender_balance))
+                logg.debug('recipient {} balance after: {}'.format(recipient, recipient_balance))
+            if r['status'] == 0:
+                logg.critical('VM revert. Wish I could tell you more')
+                sys.exit(1)
+        print(tx_hash_hex)
+
+    else:
+        print(o['params'][0])
+
+
+if __name__ == '__main__':
+    main()