def test_london_configuration():
if not is_supported_pyevm_version_available():
pytest.skip("PyEVM is not available")
backend = PyEVMBackend(vm_configuration=((0, LondonVM), ))
assert backend.get_block_by_number(0)['base_fee_per_gas'] == 1000000000
EthereumTester(backend=backend)
def test_override_genesis_parameters(self):
# Establish a custom gas limit
param_overrides = {"gas_limit": 4750000}
block_one_gas_limit = param_overrides['gas_limit']
# Initialize PyEVM backend with custom genesis parameters
genesis_params = PyEVMBackend._generate_genesis_params(
overrides=param_overrides)
pyevm_backend = PyEVMBackend(genesis_parameters=genesis_params)
genesis_block = pyevm_backend.get_block_by_number(0)
assert genesis_block["gas_limit"] == param_overrides["gas_limit"]
genesis_block = pyevm_backend.get_block_by_number(1)
assert genesis_block["gas_limit"] == block_one_gas_limit
# Integrate with EthereumTester
tester = EthereumTester(backend=pyevm_backend)
genesis_block = tester.get_block_by_number(0)
assert genesis_block["gas_limit"] == param_overrides["gas_limit"]
genesis_block = tester.get_block_by_number(1)
assert genesis_block["gas_limit"] == block_one_gas_limit
