chainlib-eth/chainlib/eth/unittest/ethtester.py

81 lines
2.5 KiB
Python

# standard imports
import os
import unittest
import logging
# external imports
import eth_tester
from crypto_dev_signer.eth.signer import ReferenceSigner as EIP155Signer
from crypto_dev_signer.keystore.dict import DictKeystore
from hexathon import (
strip_0x,
add_0x,
)
from eth import constants
from eth.vm.forks.byzantium import ByzantiumVM
# local imports
from .base import (
EthTesterSigner,
TestRPCConnection,
)
from chainlib.connection import (
RPCConnection,
ConnType,
)
from chainlib.eth.address import to_checksum_address
from chainlib.chain import ChainSpec
logg = logging.getLogger(__name__)
test_address = bytes.fromhex('Eb3907eCad74a0013c259D5874AE7f22DcBcC95C')
def create_tester_signer(keystore):
genesis_params = eth_tester.backends.pyevm.main.get_default_genesis_params({
'gas_limit': 8000000,
'coinbase': test_address, # doesn't seem to work
})
vm_configuration = (
(constants.GENESIS_BLOCK_NUMBER, ByzantiumVM),
)
genesis_state = eth_tester.PyEVMBackend._generate_genesis_state(num_accounts=30)
eth_backend = eth_tester.PyEVMBackend(
genesis_state=genesis_state,
genesis_parameters=genesis_params,
vm_configuration=vm_configuration,
)
return EthTesterSigner(eth_backend, keystore)
class EthTesterCase(unittest.TestCase):
def __init__(self, foo):
super(EthTesterCase, self).__init__(foo)
self.accounts = []
def setUp(self):
self.chain_spec = ChainSpec('evm', 'foochain', 42)
self.keystore = DictKeystore()
eth_tester_instance = create_tester_signer(self.keystore)
self.signer = EIP155Signer(self.keystore)
self.helper = eth_tester_instance
self.backend = self.helper.backend
self.rpc = TestRPCConnection(None, eth_tester_instance, self.signer)
for a in self.keystore.list():
self.accounts.append(add_0x(to_checksum_address(a)))
def rpc_with_tester(chain_spec=self.chain_spec, url=None):
return self.rpc
RPCConnection.register_constructor(ConnType.CUSTOM, rpc_with_tester, tag='default')
RPCConnection.register_constructor(ConnType.CUSTOM, rpc_with_tester, tag='signer')
RPCConnection.register_location('custom', self.chain_spec, tag='default', exist_ok=True)
RPCConnection.register_location('custom', self.chain_spec, tag='signer', exist_ok=True)
def tearDown(self):
pass