types#ContractPromise TypeScript Examples

export function InstantiateContextProvider({
  children,
}: React.PropsWithChildren<Partial<InstantiateProps>>) {
  const navigate = useNavigate();
  const dbState = useDatabase();
  const apiState = useApi();
  const NOOP = () => Promise.resolve();
  const { codeHash: codeHashUrlParam } = useParams<{ codeHash: string }>();
  const [currentStep, stepForward, stepBackward, setStep] = useStepper(initialState.currentStep);

  const [data, setData] = useState<InstantiateData>(initialState.data);
  const [[tx, onInstantiate], setTx] = useState<TxState>([null, NOOP, null]);
  const [dryRunResult, setDryRunResult] = useState<ContractInstantiateResult>();

  const onSuccess = useCallback(
    (contract: ContractPromise, _?: BlueprintPromise | undefined) => {
      navigate(`/contract/${contract.address}`);

      dbState.refreshUserData();
    },

    [dbState, navigate]
  );

  const onFinalize = (formData: Partial<InstantiateData>) => {
    const newData = { ...data, ...formData };
    try {
      const tx = createInstantiateTx(apiState.api, newData);

      const onInstantiate = (codeHashUrlParam ? onInsantiateFromHash : onInstantiateFromCode)(
        dbState,
        newData,
        onSuccess
      );
      setTx([tx, onInstantiate, null]);
      setData(newData);
      stepForward();
    } catch (e) {
      console.error(e);

      setTx([null, NOOP, 'Error creating transaction']);
    }
  };

  const onFormChange = useCallback(
    async (formData: Step2FormData) => {
      try {
        const constructor = data.metadata?.findConstructor(formData.constructorIndex);

        const inputData = constructor?.toU8a(
          transformUserInput(apiState.api.registry, constructor.args, formData.argValues)
        );

        const params = {
          origin: data.accountId,
          gasLimit: formData.weight || maximumBlockWeight(apiState.api),
          storageDepositLimit: formData.storageDepositLimit,
          code: codeHashUrlParam
            ? { Existing: codeHashUrlParam }
            : { Upload: data.metadata?.info.source.wasm },
          data: inputData,
          salt: formData.salt || undefined,
          value: formData.value
            ? apiState.api.registry.createType('Balance', formData.value)
            : null,
        };

        if (params.origin) {
          const result = await apiState.api.rpc.contracts.instantiate(params);

          setDryRunResult(result);
        }
      } catch (e) {
        console.error(e);
      }
    },
    [apiState.api, codeHashUrlParam, data.accountId, data.metadata]
  );

  function onUnFinalize() {
    setTx([null, NOOP, null]);
    setStep(2);
  }

  const value: InstantiateState = {
    data,
    setData,
    currentStep,
    dryRunResult,
    setStep,
    stepForward,
    stepBackward,
    onSuccess,
    onUnFinalize,
    onFinalize,
    onFormChange,
    tx,
    onInstantiate,
    onError: NOOP,
  };

  return <InstantiateContext.Provider value={value}>{children}</InstantiateContext.Provider>;
}