eth-contract-registry/python/eth_contract_registry/registry.py
2021-04-30 13:11:22 +02:00

137 lines
3.7 KiB
Python

# standard imports
import os
import logging
import json
import hashlib
# third-party imports
from chainlib.eth.contract import (
ABIContractEncoder,
ABIContractType,
abi_decode_single,
)
from chainlib.chain import ChainSpec
from chainlib.eth.constant import (
ZERO_ADDRESS,
)
from chainlib.jsonrpc import (
jsonrpc_template,
)
from hexathon import (
even,
add_0x,
)
from chainlib.eth.tx import TxFactory
# local imports
from .encoding import (
to_identifier,
from_identifier_hex,
)
from .interface import Registry
logg = logging.getLogger(__name__)
moddir = os.path.dirname(__file__)
datadir = os.path.join(moddir, 'data')
class ContractRegistry(Registry):
default_chain_spec = None
__chains_registry = {}
__abi = None
__bytecode = None
@staticmethod
def abi():
if ContractRegistry.__abi == None:
f = open(os.path.join(datadir, 'Registry.json'), 'r')
ContractRegistry.__abi = json.load(f)
f.close()
return ContractRegistry.__abi
@staticmethod
def bytecode():
if ContractRegistry.__bytecode == None:
f = open(os.path.join(datadir, 'Registry.bin'))
ContractRegistry.__bytecode = f.read()
f.close()
return ContractRegistry.__bytecode
@staticmethod
def gas(code=None):
return 1500000
def constructor(self, sender_address, identifier_strings=[]):
# TODO: handle arrays in chainlib encode instead
enc = ABIContractEncoder()
enc.uint256(32)
enc.uint256(len(identifier_strings))
for s in identifier_strings:
enc.bytes32(to_identifier(s))
data = enc.get_contents()
tx = self.template(sender_address, None, use_nonce=True)
tx = self.set_code(tx, ContractRegistry.bytecode() + data)
logg.debug('bytecode {}\ndata {}\ntx {}'.format(ContractRegistry.bytecode(), data, tx))
return self.build(tx)
@staticmethod
def address(address=None):
if address != None:
ContractRegistry.__address = address
return Registry.__address
@staticmethod
def load_for(chain_spec):
chain_str = str(chain_spec)
raise NotImplementedError()
def set(self, contract_address, sender_address, identifier_string, address, chain_spec, chain_config_hash):
enc = ABIContractEncoder()
enc.method('set')
enc.typ(ABIContractType.BYTES32)
enc.typ(ABIContractType.ADDRESS)
enc.typ(ABIContractType.BYTES32)
enc.typ(ABIContractType.BYTES32)
identifier = to_identifier(identifier_string)
enc.bytes32(identifier)
enc.address(address)
chain_str = str(chain_spec)
h = hashlib.new('sha256')
h.update(chain_str.encode('utf-8'))
chain_description_hash_bytes = h.digest()
enc.bytes32(chain_description_hash_bytes.hex())
enc.bytes32(chain_config_hash)
data = enc.encode()
tx = self.template(sender_address, contract_address, use_nonce=True)
tx = self.set_code(tx, data)
return self.build(tx)
def identifier(self, contract_address, idx, sender_address=ZERO_ADDRESS):
o = jsonrpc_template()
o['method'] = 'eth_call'
enc = ABIContractEncoder()
enc.method('identifiers')
enc.typ(ABIContractType.UINT256)
enc.uint256(idx)
data = add_0x(enc.encode())
tx = self.template(sender_address, contract_address)
tx = self.set_code(tx, data)
o['params'].append(self.normalize(tx))
return o
@classmethod
def parse_identifier(self, v):
return from_identifier_hex(v)