Add decode script

python/CHANGELOG

@@ -3,6 +3,7 @@
 	- Change makefile to compile contract for Byzantium.
 	- Change mint method name to mintTo
 	- Add add minter executable script
+	- Add decode script
 * 0.0.6
 	- Rename contracts-dir flag to abi-dir
 	- Use package data dir as default abi dir

python/eth_erc20/erc20.py

@@ -33,6 +33,8 @@ logg = logging.getLogger()
 
 class ERC20(TxFactory):
    
+    def gas(self, code=None):
+        return 8000000
 
     def balance_of(self, contract_address, address, sender_address=ZERO_ADDRESS):
         o = jsonrpc_template()
@@ -164,8 +166,18 @@ class ERC20(TxFactory):
         return abi_decode_single(ABIContractType.UINT256, v)
 
 
+    @classmethod
+    def parse_total_supply(self, v):
+        return abi_decode_single(ABIContractType.UINT256, v)
+
+
     @classmethod
     def parse_balance(self, v):
+        return self.parse_balance_of(v)
+
+
+    @classmethod
+    def parse_balance_of(self, v):
         return abi_decode_single(ABIContractType.UINT256, v)
 
 

python/eth_erc20/runnable/decode.py

@@ -0,0 +1,77 @@
+#!python3
+
+"""Decode raw ERC20 transaction
+
+.. 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
+import select
+
+# external imports
+from chainlib.eth.tx import unpack
+from chainlib.chain import ChainSpec
+from chainlib.eth.connection import EthHTTPConnection
+
+# local imports
+from eth_erc20.runnable.util import Decoder
+
+logging.basicConfig(level=logging.WARNING)
+logg = logging.getLogger()
+
+def stdin_arg(t=0):
+    h = select.select([sys.stdin], [], [], t)
+    if len(h[0]) > 0:
+        logg.debug('got stdin arg')
+        v = h[0][0].read()
+        return v.rstrip()
+    return None
+
+default_eth_provider = os.environ.get('ETH_PROVIDER', 'http://localhost:8545')
+
+argparser = argparse.ArgumentParser()
+argparser.add_argument('-p', '--provider', dest='p', default=default_eth_provider, type=str, help='Web3 provider url (http only)')
+argparser.add_argument('-n', '--no-resolve', dest='n', action='store_true', help='Do not resolve token metadata on-chain')
+argparser.add_argument('-i', '--chain-id', dest='i', default='evm:ethereum:1', type=str, help='Numeric network id')
+argparser.add_argument('-v', action='store_true', help='Be verbose')
+argparser.add_argument('-vv', action='store_true', help='Be more verbose')
+argparser.add_argument('tx', type=str, nargs='?', default=stdin_arg(), help='hex-encoded signed raw transaction')
+args = argparser.parse_args()
+
+if args.vv:
+    logg.setLevel(logging.DEBUG)
+elif args.v:
+    logg.setLevel(logging.INFO)
+
+argp = args.tx
+if argp == None:
+    logg.info('no argument provided or delayed stdin, attempting another read')
+    argp = stdin_arg(t=None)
+    if argp == None:
+        argparser.error('need first positional argument or value from stdin')
+
+conn = EthHTTPConnection(args.p)
+
+chain_spec = ChainSpec.from_chain_str(args.i)
+
+no_resolve = args.n
+
+def main():
+    tx_raw = argp
+    resolve_rpc = None
+    if not no_resolve:
+        resolve_rpc = conn
+    dec = Decoder(chain_spec)
+    dec.decode_for_puny_humans(tx_raw, chain_spec, sys.stdout, 'transfer', rpc=resolve_rpc)
+
+if __name__ == '__main__':
+    main()

python/eth_erc20/runnable/transfer.py

@@ -10,6 +10,7 @@
 # SPDX-License-Identifier: GPL-3.0-or-later
 
 # standard imports
+import sys
 import os
 import io
 import json
@@ -29,6 +30,9 @@ from chainlib.eth.nonce import (
         RPCNonceOracle,
         OverrideNonceOracle,
         )
+from chainlib.eth.tx import (
+        unpack,
+        )
 from chainlib.eth.gas import (
         RPCGasOracle,
         OverrideGasOracle,
@@ -42,18 +46,17 @@ from eth_erc20 import ERC20
 logging.basicConfig(level=logging.WARNING)
 logg = logging.getLogger()
 
-logging.getLogger('web3').setLevel(logging.WARNING)
-logging.getLogger('urllib3').setLevel(logging.WARNING)
+default_eth_provider = os.environ.get('ETH_PROVIDER', 'http://localhost:8545')
 
-default_abi_dir = '/usr/local/share/cic/solidity/abi'
 argparser = argparse.ArgumentParser()
-argparser.add_argument('-p', '--provider', dest='p', default='http://localhost:8545', type=str, help='Web3 provider url (http only)')
+argparser.add_argument('-p', '--provider', dest='p', default=default_eth_provider, type=str, help='Web3 provider url (http only)')
 argparser.add_argument('-w', action='store_true', help='Wait for the last transaction to be confirmed')
 argparser.add_argument('-ww', action='store_true', help='Wait for every transaction to be confirmed')
 argparser.add_argument('-i', '--chain-spec', dest='i', type=str, default='evm:ethereum:1', help='Chain specification string')
-argparser.add_argument('-a', '--token-address', required='True', dest='a', type=str, help='Token address')
-argparser.add_argument('-y', '--key-file', dest='y', type=str, help='Ethereum keystore file to use for signing')
+argparser.add_argument('-a', '--token-address', required=True, dest='a', type=str, help='Token address')
+argparser.add_argument('-y', '--key-file', dest='y', required=True, type=str, help='Ethereum keystore file to use for signing')
 argparser.add_argument('--env-prefix', default=os.environ.get('CONFINI_ENV_PREFIX'), dest='env_prefix', type=str, help='environment prefix for variables to overwrite configuration')
+argparser.add_argument('--data-only', dest='data_only', action='store_true', help='output data part only (does not require key)')
 argparser.add_argument('-u', '--unsafe', dest='u', action='store_true', help='Auto-convert address to checksum adddress')
 argparser.add_argument('-s', '--send', dest='s', action='store_true', help='Send to network')
 argparser.add_argument('--nonce', type=int, help='Override nonce')
@@ -74,6 +77,10 @@ elif args.v:
 block_all = args.ww 
 block_last = args.w or block_all
 
+signer = None
+signer_address = None
+nonce_oracle = None
+
 passphrase_env = 'ETH_PASSPHRASE'
 if args.env_prefix != None:
     passphrase_env = args.env_prefix + '_' + passphrase_env
@@ -83,7 +90,6 @@ if passphrase == None:
     logg.warning('no passphrase given')
     passphrase=''
 
-signer_address = None
 keystore = DictKeystore()
 if args.y != None:
     logg.debug('loading keystore file {}'.format(args.y))
@@ -99,14 +105,12 @@ if args.nonce != None:
 else:
     nonce_oracle = RPCNonceOracle(signer_address, conn)
 
-def _max_gas(code=None):
-    return 8000000
 
 gas_oracle = None
 if args.gas_price != None or args.gas_limit != None:
     gas_oracle = OverrideGasOracle(price=args.gas_price, limit=args.gas_limit)
 else:
-    gas_oracle = RPCGasOracle(conn, code_callback=_max_gas)
+    gas_oracle = RPCGasOracle(conn, code_callback=ERC20.gas())
 
 chain_spec = ChainSpec.from_chain_str(args.i)
 chain_id = chain_spec.network_id()
@@ -115,6 +119,8 @@ value = args.amount
 
 send = args.s
 
+data_only = args.data_only
+
 g = ERC20(chain_spec, signer=signer, gas_oracle=gas_oracle, nonce_oracle=nonce_oracle)
 
 
@@ -135,6 +141,11 @@ def main():
         logg.debug('recipient {} balance after: {}'.format(recipient, balance(args.a, recipient)))
 
     (tx_hash_hex, o) = g.transfer(args.a, signer_address, recipient, value)
+    if data_only:
+        tx_raw_bytes = bytes.fromhex(strip_0x(o['params'][0]))
+        tx = unpack(tx_raw_bytes, chain_spec)
+        print(tx['data'])
+        sys.exit(0)
 
     if send:
         conn.do(o)

python/eth_erc20/runnable/util.py

@@ -0,0 +1,71 @@
+# external imports
+from chainlib.eth.tx import (
+        unpack,
+        Tx,
+        )
+from hexathon import (
+        strip_0x,
+        add_0x,
+        )
+from chainlib.eth.constant import ZERO_ADDRESS
+from chainlib.eth.runnable.util import decode_out
+
+# local imports
+from eth_erc20.erc20 import ERC20
+
+sender_address = ZERO_ADDRESS
+
+
+class Decoder:
+
+    def __init__(self, chain_spec):
+        self.chain_spec = chain_spec
+
+
+    def decode_transfer(self, tx, writer, rpc=None):
+        r = ERC20.parse_transfer_request(tx['data'])    
+        token_value = r[1]
+        token_str = tx['to']
+        token_recipient = r[0]
+        if rpc != None:
+            c = ERC20(self.chain_spec)
+            o = c.symbol(tx['to'], sender_address=sender_address)
+            r = rpc.do(o)
+            symbol = c.parse_symbol(r)
+
+            o = c.name(tx['to'], sender_address=sender_address)
+            r = rpc.do(o)
+            name = c.parse_symbol(r)
+
+            o = c.decimals(tx['to'], sender_address=sender_address)
+            r = rpc.do(o)
+            decimals = c.parse_decimals(r)
+
+            token_str = '{} ({})'.format(name, symbol)
+            token_value = token_value / (10 ** decimals)
+            token_value_str = '{:.6f} ({} decimals)'.format(token_value, decimals)
+
+        writer.write("""to: {}
+token: {}
+value: {}
+""".format(
+    token_recipient,
+    token_str,
+    token_value_str,
+    )
+)
+
+        #writer.write('{}\n'.format(r))k
+
+
+    def decode_for_puny_humans(self, tx_raw, chain_spec, writer, method, rpc=None):
+        tx_raw = strip_0x(tx_raw)
+        tx_raw_bytes = bytes.fromhex(tx_raw)
+        tx_src = unpack(tx_raw_bytes, chain_spec)
+        tx = Tx.src_normalize(tx_src)
+      
+        self.decode_transfer(tx, writer, rpc=rpc)
+
+        decode_out(tx_src, writer, skip_keys=['to'])
+        
+        writer.write('src: {}\n'.format(add_0x(tx_raw)))

python/setup.cfg

@@ -1,6 +1,6 @@
 [metadata]
 name = eth-erc20
-version = 0.0.9a2
+version = 0.0.9a5
 description = ERC20 interface and simple contract with deployment script that lets any address mint and gift itself tokens.
 author = Louis Holbrook
 author_email = dev@holbrook.no
@@ -44,3 +44,4 @@ console_scripts =
 	giftable-token-minter = giftable_erc20_token.runnable.minter:main
 	erc20-transfer = eth_erc20.runnable.transfer:main
 	erc20-balance = eth_erc20.runnable.balance:main
+	erc20-decode = eth_erc20.runnable.decode:main