def get_contract_factory(self, name: ContractName, w3: Web3 = None) -> Contract: """ API to generate a contract factory class. """ current_w3 = None if w3 is not None: current_w3 = w3 else: current_w3 = self.w3 validate_contract_name(name) validate_w3_instance(current_w3) try: contract_data = self.package_data["contract_types"][name] validate_minimal_contract_factory_data(contract_data) except KeyError: raise InsufficientAssetsError( "This package has insufficient package data to generate " "a contract factory for contract:{0}.".format(name) ) contract_kwargs = generate_contract_factory_kwargs(contract_data) contract_factory = current_w3.eth.contract(**contract_kwargs) return contract_factory
def get_contract_factory(self, name: ContractName) -> Contract: """ Return the contract factory for a given contract type, generated from the data vailable in ``Package.manifest``. Contract factories are accessible from the package class. .. code:: python Owned = OwnedPackage.get_contract_factory('owned') In cases where a contract uses a library, the contract factory will have unlinked bytecode. The ``ethpm`` package ships with its own subclass of ``web3.contract.Contract``, ``ethpm.contract.LinkableContract`` with a few extra methods and properties related to bytecode linking. .. code:: python >>> math = owned_package.contract_factories.math >>> math.needs_bytecode_linking True >>> linked_math = math.link_bytecode({'MathLib': '0x1234...'}) >>> linked_math.needs_bytecode_linking False """ validate_contract_name(name) if "contract_types" not in self.manifest: raise InsufficientAssetsError( "This package does not contain any contract type data." ) try: contract_data = self.manifest["contract_types"][name] except KeyError: raise InsufficientAssetsError( "This package does not contain any package data to generate " f"a contract factory for contract type: {name}. Available contract types include: " f"{ list(self.manifest['contract_types'].keys()) }." ) validate_minimal_contract_factory_data(contract_data) contract_kwargs = generate_contract_factory_kwargs(contract_data) contract_factory = self.w3.eth.contract(**contract_kwargs) return contract_factory
def get_contract_factory(self, name: ContractName) -> Contract: """ Return a contract factory for a given contract type. """ validate_contract_name(name) if "contract_types" not in self.manifest: raise InsufficientAssetsError( "This package does not contain any contract type data.") try: contract_data = self.manifest["contract_types"][name] except KeyError: raise InsufficientAssetsError( "This package does not contain any package data to generate " f"a contract factory for contract type: {name}. Available contract types include: " f"{ list(self.manifest['contract_types'].keys()) }.") validate_minimal_contract_factory_data(contract_data) contract_kwargs = generate_contract_factory_kwargs(contract_data) contract_factory = self.w3.eth.contract(**contract_kwargs) return contract_factory
def test_validate_minimal_contract_factory_data_invalidates(contract_data): with pytest.raises(InsufficientAssetsError): validate_minimal_contract_factory_data(contract_data)
def test_validate_minimal_contract_factory_data_validates(contract_data): assert validate_minimal_contract_factory_data(contract_data) is None