295 lines
8.9 KiB
Python
295 lines
8.9 KiB
Python
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# standard imports
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import logging
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# external imports
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import sha3
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from hexathon import (
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add_0x,
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strip_0x,
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)
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# external imports
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from chainlib.hash import (
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keccak256_hex_to_hex,
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keccak256_string_to_hex,
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)
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from chainlib.eth.constant import ZERO_ADDRESS
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from chainlib.eth.tx import (
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TxFactory,
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TxFormat,
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)
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from chainlib.jsonrpc import JSONRPCRequest
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from chainlib.eth.contract import (
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ABIContractEncoder,
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ABIContractDecoder,
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ABIContractType,
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abi_decode_single,
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)
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from chainlib.eth.error import RequestMismatchException
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logg = logging.getLogger(__name__)
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class ERC20(TxFactory):
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def balance_of(self, contract_address, address, sender_address=ZERO_ADDRESS, id_generator=None):
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j = JSONRPCRequest(id_generator)
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o = j.template()
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o['method'] = 'eth_call'
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enc = ABIContractEncoder()
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enc.method('balanceOf')
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enc.typ(ABIContractType.ADDRESS)
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enc.address(address)
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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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o = j.finalize(o)
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return o
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def balance(self, contract_address, address, sender_address=ZERO_ADDRESS, id_generator=None):
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return self.balance_of(contract_address, address, sender_address=sender_address, id_generator=id_generator)
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def symbol(self, contract_address, sender_address=ZERO_ADDRESS, id_generator=None):
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j = JSONRPCRequest(id_generator)
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o = j.template()
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o['method'] = 'eth_call'
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enc = ABIContractEncoder()
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enc.method('symbol')
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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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o = j.finalize(o)
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return o
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def name(self, contract_address, sender_address=ZERO_ADDRESS, id_generator=None):
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j = JSONRPCRequest(id_generator)
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o = j.template()
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o['method'] = 'eth_call'
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enc = ABIContractEncoder()
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enc.method('name')
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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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o = j.finalize(o)
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return o
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def decimals(self, contract_address, sender_address=ZERO_ADDRESS, id_generator=None):
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j = JSONRPCRequest(id_generator)
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o = j.template()
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o['method'] = 'eth_call'
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enc = ABIContractEncoder()
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enc.method('decimals')
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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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o = j.finalize(o)
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return o
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def total_supply(self, contract_address, sender_address=ZERO_ADDRESS, id_generator=None):
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j = JSONRPCRequest(id_generator)
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o = j.template()
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o['method'] = 'eth_call'
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enc = ABIContractEncoder()
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enc.method('totalSupply')
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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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o = j.finalize(o)
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return o
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def allowance(self, contract_address, holder_address, spender_address, sender_address=ZERO_ADDRESS, id_generator=None):
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j = JSONRPCRequest(id_generator)
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o = j.template()
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o['method'] = 'eth_call'
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enc = ABIContractEncoder()
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enc.method('allowance')
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enc.typ(ABIContractType.ADDRESS)
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enc.typ(ABIContractType.ADDRESS)
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enc.address(holder_address)
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enc.address(spender_address)
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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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o = j.finalize(o)
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return o
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def transfer(self, contract_address, sender_address, recipient_address, value, tx_format=TxFormat.JSONRPC, id_generator=None):
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enc = ABIContractEncoder()
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enc.method('transfer')
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enc.typ(ABIContractType.ADDRESS)
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enc.typ(ABIContractType.UINT256)
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enc.address(recipient_address)
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enc.uint256(value)
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data = add_0x(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, id_generator=id_generator)
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return tx
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def transfer_from(self, contract_address, sender_address, holder_address, recipient_address, value, tx_format=TxFormat.JSONRPC, id_generator=None):
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enc = ABIContractEncoder()
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enc.method('transferFrom')
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enc.typ(ABIContractType.ADDRESS)
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enc.typ(ABIContractType.ADDRESS)
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enc.typ(ABIContractType.UINT256)
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enc.address(holder_address)
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enc.address(recipient_address)
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enc.uint256(value)
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data = add_0x(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 approve(self, contract_address, sender_address, spender_address, value, tx_format=TxFormat.JSONRPC, id_generator=None):
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enc = ABIContractEncoder()
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enc.method('approve')
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enc.typ(ABIContractType.ADDRESS)
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enc.typ(ABIContractType.UINT256)
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enc.address(spender_address)
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enc.uint256(value)
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data = add_0x(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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@classmethod
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def parse_symbol(self, v):
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return abi_decode_single(ABIContractType.STRING, v)
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@classmethod
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def parse_name(self, v):
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return abi_decode_single(ABIContractType.STRING, v)
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@classmethod
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def parse_decimals(self, v):
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return abi_decode_single(ABIContractType.UINT256, v)
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@classmethod
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def parse_balance(self, v):
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return abi_decode_single(ABIContractType.UINT256, v)
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@classmethod
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def parse_balance_of(self, v):
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return self.parse_balance(v)
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@classmethod
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def parse_total_supply(self, v):
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return abi_decode_single(ABIContractType.UINT256, v)
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@classmethod
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def parse_allowance(self, v):
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return abi_decode_single(ABIContractType.UINT256, v)
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@classmethod
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def parse_transfer_request(self, v):
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v = strip_0x(v)
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cursor = 0
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enc = ABIContractEncoder()
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enc.method('transfer')
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enc.typ(ABIContractType.ADDRESS)
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enc.typ(ABIContractType.UINT256)
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r = enc.get()
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l = len(r)
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m = v[:l]
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if m != r:
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logg.debug('method mismatch, expected {}, got {}'.format(r, m))
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raise RequestMismatchException(v)
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cursor += l
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dec = ABIContractDecoder()
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dec.typ(ABIContractType.ADDRESS)
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dec.typ(ABIContractType.UINT256)
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dec.val(v[cursor:cursor+64])
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cursor += 64
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dec.val(v[cursor:cursor+64])
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r = dec.decode()
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return r
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@classmethod
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def parse_transfer_from_request(self, v):
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v = strip_0x(v)
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cursor = 0
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enc = ABIContractEncoder()
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enc.method('transferFrom')
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enc.typ(ABIContractType.ADDRESS)
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enc.typ(ABIContractType.ADDRESS)
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enc.typ(ABIContractType.UINT256)
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r = enc.get()
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l = len(r)
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m = v[:l]
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if m != r:
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logg.debug('method mismatch, expected {}, got {}'.format(r, m))
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raise RequestMismatchException(v)
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cursor += l
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dec = ABIContractDecoder()
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dec.typ(ABIContractType.ADDRESS)
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dec.typ(ABIContractType.ADDRESS)
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dec.typ(ABIContractType.UINT256)
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dec.val(v[cursor:cursor+64])
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cursor += 64
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dec.val(v[cursor:cursor+64])
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cursor += 64
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dec.val(v[cursor:cursor+64])
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r = dec.decode()
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return r
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@classmethod
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def parse_approve_request(self, v):
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v = strip_0x(v)
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cursor = 0
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enc = ABIContractEncoder()
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enc.method('approve')
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enc.typ(ABIContractType.ADDRESS)
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enc.typ(ABIContractType.UINT256)
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r = enc.get()
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l = len(r)
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m = v[:l]
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if m != r:
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logg.debug('method mismatch, expected {}, got {}'.format(r, m))
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raise RequestMismatchException(v)
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cursor += l
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dec = ABIContractDecoder()
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dec.typ(ABIContractType.ADDRESS)
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dec.typ(ABIContractType.UINT256)
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dec.val(v[cursor:cursor+64])
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cursor += 64
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dec.val(v[cursor:cursor+64])
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r = dec.decode()
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return r
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