def w3(signing_account):
"""
Web3 object connected to the ethereum tester chain
"""
chain = eth_tester.EthereumTester(eth_tester.PyEVMBackend())
chain.send_transaction({
"from": chain.get_accounts()[0],
"to": signing_account.address,
"gas": 21000,
"value": 10_000_000,
})
w3 = Web3(EthereumTesterProvider(chain))
w3.middleware_onion.add(parity_next_nonce)
signing_middleware.install_signing_middleware(w3, signing_account)
return w3
def chain(pytestconfig):
"""
The running ethereum tester chain
Can be used as to manipulate the chain, e.g. chain.mine_block()
see https://github.com/ethereum/eth-tester for more
"""
expose_port = pytestconfig.getoption(EXPOSE_RPC_OPTION)
if expose_port:
if is_port_in_use(expose_port):
raise EnvironmentError(
f"The port {expose_port} is already in use on the machine.")
# redirect stdout because otherwise the application prints every request and result
# Get the eth-tester-rpc application
application = get_application()
rpc = application.rpc_methods
# Remove the printing of every rpc replies to avoid flooding the tests outputs
application = silent_stdout(application)
application.rpc_methods = rpc
# Start the server so that we can use rpc on http://localhost:expose_port
# Silence the logging of every request from the handler to avoid flooding tests outputs
class NoLoggingRequestHandler(WSGIRequestHandler):
def log_request(self, code="-", size="-"):
pass
server = make_server(
"localhost",
int(expose_port),
application,
handler_class=NoLoggingRequestHandler,
)
spawn(server.serve_forever)
# yield the eth_tester chain
yield application.rpc_methods.client
else:
yield eth_tester.EthereumTester(eth_tester.PyEVMBackend())
if pytestconfig.getoption(EXPOSE_RPC_OPTION):
try:
server.stop()
except AttributeError:
server.shutdown()
def ethereum_tester():
"""Returns an instance of an Ethereum tester"""
tester = eth_tester.EthereumTester(eth_tester.PyEVMBackend())
return tester
def tester():
return eth_tester.EthereumTester(eth_tester.PyEVMBackend())
def chain():
"""
The running ethereum tester chain
"""
return eth_tester.EthereumTester(eth_tester.PyEVMBackend())