443 lines
12 KiB
Python
443 lines
12 KiB
Python
# standard imports
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import logging
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import enum
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import re
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# external imports
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import coincurve
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import sha3
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from hexathon import (
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strip_0x,
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add_0x,
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)
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from rlp import decode as rlp_decode
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from rlp import encode as rlp_encode
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from crypto_dev_signer.eth.transaction import EIP155Transaction
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from crypto_dev_signer.encoding import public_key_to_address
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from potaahto.symbols import snake_and_camel
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# local imports
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from chainlib.hash import keccak256_hex_to_hex
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from chainlib.status import Status
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from .address import to_checksum
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from .constant import (
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MINIMUM_FEE_UNITS,
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MINIMUM_FEE_PRICE,
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ZERO_ADDRESS,
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)
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from .contract import ABIContractEncoder
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from chainlib.jsonrpc import jsonrpc_template
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logg = logging.getLogger().getChild(__name__)
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class TxFormat(enum.IntEnum):
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DICT = 0x00
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RAW = 0x01
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RAW_SIGNED = 0x02
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RAW_ARGS = 0x03
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RLP = 0x10
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RLP_SIGNED = 0x11
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JSONRPC = 0x10
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field_debugs = [
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'nonce',
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'gasPrice',
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'gas',
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'to',
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'value',
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'data',
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'v',
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'r',
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's',
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]
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def count(address, confirmed=False):
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o = jsonrpc_template()
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o['method'] = 'eth_getTransactionCount'
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o['params'].append(address)
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if confirmed:
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o['params'].append('latest')
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else:
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o['params'].append('pending')
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return o
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count_pending = count
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def count_confirmed(address):
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return count(address, True)
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def unpack(tx_raw_bytes, chain_spec):
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chain_id = chain_spec.chain_id()
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tx = __unpack_raw(tx_raw_bytes, chain_id)
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tx['nonce'] = int.from_bytes(tx['nonce'], 'big')
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tx['gasPrice'] = int.from_bytes(tx['gasPrice'], 'big')
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tx['gas'] = int.from_bytes(tx['gas'], 'big')
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tx['value'] = int.from_bytes(tx['value'], 'big')
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return tx
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def unpack_hex(tx_raw_bytes, chain_spec):
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chain_id = chain_spec.chain_id()
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tx = __unpack_raw(tx_raw_bytes, chain_id)
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tx['nonce'] = add_0x(hex(tx['nonce']))
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tx['gasPrice'] = add_0x(hex(tx['gasPrice']))
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tx['gas'] = add_0x(hex(tx['gas']))
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tx['value'] = add_0x(hex(tx['value']))
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tx['chainId'] = add_0x(hex(tx['chainId']))
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return tx
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def __unpack_raw(tx_raw_bytes, chain_id=1):
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d = rlp_decode(tx_raw_bytes)
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logg.debug('decoding using chain id {}'.format(str(chain_id)))
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j = 0
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for i in d:
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v = i.hex()
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if j != 3 and v == '':
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v = '00'
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logg.debug('decoded {}: {}'.format(field_debugs[j], v))
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j += 1
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vb = chain_id
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if chain_id != 0:
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v = int.from_bytes(d[6], 'big')
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vb = v - (chain_id * 2) - 35
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r = bytearray(32)
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r[32-len(d[7]):] = d[7]
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s = bytearray(32)
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s[32-len(d[8]):] = d[8]
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sig = b''.join([r, s, bytes([vb])])
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#so = KeyAPI.Signature(signature_bytes=sig)
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h = sha3.keccak_256()
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h.update(rlp_encode(d))
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signed_hash = h.digest()
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d[6] = chain_id
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d[7] = b''
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d[8] = b''
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h = sha3.keccak_256()
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h.update(rlp_encode(d))
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unsigned_hash = h.digest()
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#p = so.recover_public_key_from_msg_hash(unsigned_hash)
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#a = p.to_checksum_address()
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pubk = coincurve.PublicKey.from_signature_and_message(sig, unsigned_hash, hasher=None)
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a = public_key_to_address(pubk)
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logg.debug('decoded recovery byte {}'.format(vb))
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logg.debug('decoded address {}'.format(a))
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logg.debug('decoded signed hash {}'.format(signed_hash.hex()))
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logg.debug('decoded unsigned hash {}'.format(unsigned_hash.hex()))
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to = d[3].hex() or None
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if to != None:
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to = to_checksum(to)
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data = d[5].hex()
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try:
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data = add_0x(data)
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except:
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data = '0x'
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return {
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'from': a,
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'to': to,
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'nonce': d[0],
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'gasPrice': d[1],
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'gas': d[2],
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'value': d[4],
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'data': data,
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'v': chain_id,
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'r': add_0x(sig[:32].hex()),
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's': add_0x(sig[32:64].hex()),
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'chainId': chain_id,
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'hash': add_0x(signed_hash.hex()),
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'hash_unsigned': add_0x(unsigned_hash.hex()),
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}
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def transaction(hsh):
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o = jsonrpc_template()
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o['method'] = 'eth_getTransactionByHash'
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o['params'].append(add_0x(hsh))
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return o
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def transaction_by_block(hsh, idx):
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o = jsonrpc_template()
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o['method'] = 'eth_getTransactionByBlockHashAndIndex'
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o['params'].append(add_0x(hsh))
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o['params'].append(hex(idx))
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return o
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def receipt(hsh):
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o = jsonrpc_template()
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o['method'] = 'eth_getTransactionReceipt'
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o['params'].append(add_0x(hsh))
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return o
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def raw(tx_raw_hex):
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o = jsonrpc_template()
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o['method'] = 'eth_sendRawTransaction'
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o['params'].append(add_0x(tx_raw_hex))
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return o
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class TxFactory:
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fee = 8000000
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def __init__(self, chain_spec, signer=None, gas_oracle=None, nonce_oracle=None):
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self.gas_oracle = gas_oracle
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self.nonce_oracle = nonce_oracle
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self.chain_spec = chain_spec
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self.signer = signer
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def build_raw(self, tx):
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if tx['to'] == None or tx['to'] == '':
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tx['to'] = '0x'
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txe = EIP155Transaction(tx, tx['nonce'], tx['chainId'])
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tx_raw = self.signer.sign_transaction_to_rlp(txe)
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tx_raw_hex = add_0x(tx_raw.hex())
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tx_hash_hex = add_0x(keccak256_hex_to_hex(tx_raw_hex))
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return (tx_hash_hex, tx_raw_hex)
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def build(self, tx):
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(tx_hash_hex, tx_raw_hex) = self.build_raw(tx)
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o = raw(tx_raw_hex)
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return (tx_hash_hex, o)
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def template(self, sender, recipient, use_nonce=False):
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gas_price = MINIMUM_FEE_PRICE
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gas_limit = MINIMUM_FEE_UNITS
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if self.gas_oracle != None:
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(gas_price, gas_limit) = self.gas_oracle.get_gas()
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logg.debug('using gas price {} limit {}'.format(gas_price, gas_limit))
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nonce = 0
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o = {
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'from': sender,
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'to': recipient,
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'value': 0,
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'data': '0x',
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'gasPrice': gas_price,
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'gas': gas_limit,
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'chainId': self.chain_spec.chain_id(),
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}
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if self.nonce_oracle != None and use_nonce:
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nonce = self.nonce_oracle.next_nonce()
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logg.debug('using nonce {} for address {}'.format(nonce, sender))
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o['nonce'] = nonce
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return o
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def normalize(self, tx):
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txe = EIP155Transaction(tx, tx['nonce'], tx['chainId'])
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txes = txe.serialize()
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return {
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'from': tx['from'],
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'to': txes['to'],
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'gasPrice': txes['gasPrice'],
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'gas': txes['gas'],
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'data': txes['data'],
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}
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def finalize(self, tx, tx_format=TxFormat.JSONRPC):
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if tx_format == TxFormat.JSONRPC:
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return self.build(tx)
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elif tx_format == TxFormat.RLP_SIGNED:
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return self.build_raw(tx)
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raise NotImplementedError('tx formatting {} not implemented'.format(tx_format))
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def set_code(self, tx, data, update_fee=True):
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tx['data'] = data
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if update_fee:
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tx['gas'] = TxFactory.fee
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if self.gas_oracle != None:
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(price, tx['gas']) = self.gas_oracle.get_gas(code=data)
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else:
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logg.debug('using hardcoded gas limit of 8000000 until we have reliable vm executor')
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return tx
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def transact_noarg(self, method, contract_address, sender_address, tx_format=TxFormat.JSONRPC):
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enc = ABIContractEncoder()
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enc.method(method)
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data = enc.get()
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tx = self.template(sender_address, contract_address, use_nonce=True)
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tx = self.set_code(tx, data)
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tx = self.finalize(tx, tx_format)
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return tx
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def call_noarg(self, method, contract_address, sender_address=ZERO_ADDRESS):
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o = jsonrpc_template()
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o['method'] = 'eth_call'
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enc = ABIContractEncoder()
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enc.method(method)
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data = add_0x(enc.get())
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tx = self.template(sender_address, contract_address)
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tx = self.set_code(tx, data)
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o['params'].append(self.normalize(tx))
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o['params'].append('latest')
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return o
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class Tx:
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# TODO: force tx type schema parser (whether expect hex or int etc)
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def __init__(self, src, block=None, rcpt=None):
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logg.debug('src {}'.format(src))
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self.src = self.src_normalize(src)
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self.index = -1
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tx_hash = add_0x(src['hash'])
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if block != None:
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i = 0
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for tx in block.txs:
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tx_hash_block = None
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try:
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tx_hash_block = tx['hash']
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except TypeError:
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tx_hash_block = add_0x(tx)
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logg.debug('tx {} cmp {}'.format(tx, tx_hash))
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if tx_hash_block == tx_hash:
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self.index = i
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break
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i += 1
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if self.index == -1:
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raise AttributeError('tx {} not found in block {}'.format(tx_hash, block.hash))
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self.block = block
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self.hash = strip_0x(tx_hash)
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try:
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self.value = int(strip_0x(src['value']), 16)
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except TypeError:
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self.value = int(src['value'])
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try:
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self.nonce = int(strip_0x(src['nonce']), 16)
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except TypeError:
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self.nonce = int(src['nonce'])
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address_from = strip_0x(src['from'])
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try:
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self.gas_price = int(strip_0x(src['gasPrice']), 16)
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except TypeError:
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self.gas_price = int(src['gasPrice'])
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try:
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self.gas_limit = int(strip_0x(src['gas']), 16)
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except TypeError:
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self.gas_limit = int(src['gas'])
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self.outputs = [to_checksum(address_from)]
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self.contract = None
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try:
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inpt = src['input']
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except KeyError:
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inpt = src['data']
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if inpt != '0x':
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inpt = strip_0x(inpt)
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else:
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inpt = ''
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self.payload = inpt
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to = src['to']
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if to == None:
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to = ZERO_ADDRESS
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self.inputs = [to_checksum(strip_0x(to))]
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self.block = block
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try:
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self.wire = src['raw']
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except KeyError:
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logg.warning('no inline raw tx src, and no raw rendering implemented, field will be "None"')
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self.src = src
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self.status = Status.PENDING
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self.logs = None
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if rcpt != None:
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self.apply_receipt(rcpt)
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@classmethod
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def src_normalize(self, src):
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return snake_and_camel(src)
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def apply_receipt(self, rcpt):
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rcpt = self.src_normalize(rcpt)
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logg.debug('rcpt {}'.format(rcpt))
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try:
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status_number = int(rcpt['status'], 16)
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except TypeError:
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status_number = int(rcpt['status'])
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if status_number == 1:
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self.status = Status.SUCCESS
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elif status_number == 0:
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self.status = Status.ERROR
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# TODO: replace with rpc receipt/transaction translator when available
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contract_address = rcpt.get('contractAddress')
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if contract_address == None:
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contract_address = rcpt.get('contract_address')
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if contract_address != None:
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self.contract = contract_address
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self.logs = rcpt['logs']
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try:
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self.gas_used = int(rcpt['gasUsed'], 16)
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except TypeError:
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self.gas_used = int(rcpt['gasUsed'])
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def __repr__(self):
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return 'block {} tx {} {}'.format(self.block.number, self.index, self.hash)
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def __str__(self):
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s = """hash {}
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from {}
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to {}
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value {}
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nonce {}
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gasPrice {}
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gasLimit {}
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input {}
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""".format(
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self.hash,
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self.outputs[0],
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self.inputs[0],
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self.value,
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self.nonce,
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self.gas_price,
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self.gas_limit,
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self.payload,
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)
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if self.status != Status.PENDING:
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s += """gasUsed {}
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""".format(
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self.gas_used,
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)
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s += 'status ' + self.status.name + '\n'
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if self.contract != None:
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s += """contract {}
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""".format(
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self.contract,
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)
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return s
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