def get_w3(ipc_path: pathlib.Path = None) -> Web3:
if ipc_path is None:
ipc_path = get_xdg_alexandria_root() / 'jsonrpc.ipc'
provider = IPCProvider(str(ipc_path))
w3 = Web3(provider=provider, modules={'alexandria': (AlexandriaModule,)})
return w3
def load_provider_from_uri(
uri_string: URI,
headers: Optional[Dict[str, Tuple[str, str]]] = None) -> BaseProvider:
uri = urlparse(uri_string)
if uri.scheme == 'file':
return IPCProvider(uri.path)
elif uri.scheme in HTTP_SCHEMES:
return HTTPProvider(uri_string, headers)
elif uri.scheme in WS_SCHEMES:
return WebsocketProvider(uri_string)
else:
raise NotImplementedError(
f'Web3 does not know how to connect to scheme {uri.scheme!r} in {uri_string!r}'
)
def load_provider_from_uri(uri_string, headers=None):
uri = urlparse(uri_string)
if uri.scheme == 'file':
return IPCProvider(uri.path)
elif uri.scheme in HTTP_SCHEMES:
return HTTPProvider(uri_string, headers)
elif uri.scheme in WS_SCHEMES:
return WebsocketProvider(uri_string)
else:
raise NotImplementedError(
'Web3 does not know how to connect to scheme %r in %r' % (
uri.scheme,
uri_string,
))
def _spawn_geth_process(self):
ipcpath = tempfile.mkstemp(suffix='.ipc')[1]
proc = subprocess.Popen(
['geth', '--dev', '-ipcpath={}'.format(ipcpath)],
stdout=subprocess.PIPE,
stdin=subprocess.PIPE,
stderr=subprocess.PIPE,
)
atexit.register(lambda: proc.kill())
self.proc = proc
self.web3 = Web3(IPCProvider(ipcpath))
self.web3.middleware_stack.inject(geth_poa_middleware, layer=0)
while not self.web3.isConnected():
time.sleep(0.1)
def load_provider_from_environment():
uri_string = os.environ.get('WEB3_PROVIDER_URI', '')
if not uri_string:
return None
uri = urlparse(uri_string)
if uri.scheme == 'file':
return IPCProvider(uri.path)
elif uri.scheme == 'http':
return HTTPProvider(uri_string)
else:
raise NotImplementedError(
'Web3 does not know how to connect to scheme %r in %r' % (
uri.scheme,
uri_string,
))
def test_is_strictly_default_http_middleware():
web3 = HTTPProvider()
assert 'http_retry_request' in web3.middlewares
web3 = IPCProvider()
assert 'http_retry_request' not in web3.middlewares