eth-token-index/python/eth_token_index/index.py
2021-10-24 15:58:01 +02:00

160 lines
4.6 KiB
Python

# Author: Louis Holbrook <dev@holbrook.no> 0826EDA1702D1E87C6E2875121D2E7BB88C2A746
# SPDX-License-Identifier: GPL-3.0-or-later
# File-version: 1
# Description: Python interface to abi and bin files for faucet contracts
# standard imports
import logging
import json
import os
import hashlib
# external imports
from chainlib.eth.contract import (
ABIContractEncoder,
ABIContractType,
abi_decode_single,
)
from chainlib.eth.tx import (
TxFactory,
TxFormat,
)
from chainlib.jsonrpc import JSONRPCRequest
from chainlib.eth.constant import ZERO_ADDRESS
from hexathon import (
add_0x,
)
logg = logging.getLogger(__name__)
moddir = os.path.dirname(__file__)
datadir = os.path.join(moddir, 'data')
def to_identifier(s):
h = hashlib.new('sha256')
h.update(s.encode('utf-8'))
return h.digest().hex()
class TokenUniqueSymbolIndex(TxFactory):
__abi = None
__bytecode = None
@staticmethod
def abi():
if TokenUniqueSymbolIndex.__abi == None:
f = open(os.path.join(datadir, 'TokenUniqueSymbolIndex.json'), 'r')
TokenUniqueSymbolIndex.__abi = json.load(f)
f.close()
return TokenUniqueSymbolIndex.__abi
@staticmethod
def bytecode():
if TokenUniqueSymbolIndex.__bytecode == None:
f = open(os.path.join(datadir, 'TokenUniqueSymbolIndex.bin'))
TokenUniqueSymbolIndex.__bytecode = f.read()
f.close()
return TokenUniqueSymbolIndex.__bytecode
@staticmethod
def gas(code=None):
return 1200000
def constructor(self, sender_address):
code = TokenUniqueSymbolIndex.bytecode()
tx = self.template(sender_address, None, use_nonce=True)
tx = self.set_code(tx, code)
return self.build(tx)
def register(self, contract_address, sender_address, address, tx_format=TxFormat.JSONRPC):
enc = ABIContractEncoder()
enc.method('register')
enc.typ(ABIContractType.ADDRESS)
enc.address(address)
data = enc.get()
tx = self.template(sender_address, contract_address, use_nonce=True)
tx = self.set_code(tx, data)
tx = self.finalize(tx, tx_format)
return tx
def add_writer(self, contract_address, sender_address, address, tx_format=TxFormat.JSONRPC, id_generator=None):
enc = ABIContractEncoder()
enc.method('addWriter')
enc.typ(ABIContractType.ADDRESS)
enc.address(address)
data = enc.get()
tx = self.template(sender_address, contract_address, use_nonce=True)
tx = self.set_code(tx, data)
tx = self.finalize(tx, tx_format)
return tx
def address_of(self, contract_address, token_symbol, sender_address=ZERO_ADDRESS, id_generator=None):
j = JSONRPCRequest(id_generator)
o = j.template()
o['method'] = 'eth_call'
enc = ABIContractEncoder()
enc.method('addressOf')
enc.typ(ABIContractType.BYTES32)
token_symbol_digest = to_identifier(token_symbol)
enc.bytes32(token_symbol_digest)
data = add_0x(enc.get())
tx = self.template(sender_address, contract_address)
tx = self.set_code(tx, data)
o['params'].append(self.normalize(tx))
o = j.finalize(o)
return o
def entry(self, contract_address, idx, sender_address=ZERO_ADDRESS, id_generator=None):
j = JSONRPCRequest(id_generator)
o = j.template()
o['method'] = 'eth_call'
enc = ABIContractEncoder()
enc.method('entry')
enc.typ(ABIContractType.UINT256)
enc.uint256(idx)
data = add_0x(enc.get())
tx = self.template(sender_address, contract_address)
tx = self.set_code(tx, data)
o['params'].append(self.normalize(tx))
o = j.finalize(o)
return o
def entry_count(self, contract_address, sender_address=ZERO_ADDRESS, id_generator=None):
j = JSONRPCRequest(id_generator)
o = j.template()
o['method'] = 'eth_call'
enc = ABIContractEncoder()
enc.method('entryCount')
data = add_0x(enc.get())
tx = self.template(sender_address, contract_address)
tx = self.set_code(tx, data)
o['params'].append(self.normalize(tx))
o = j.finalize(o)
return o
@classmethod
def parse_address_of(self, v):
return abi_decode_single(ABIContractType.ADDRESS, v)
@classmethod
def parse_entry(self, v):
return abi_decode_single(ABIContractType.ADDRESS, v)
@classmethod
def parse_entry_count(self, v):
return abi_decode_single(ABIContractType.UINT256, v)