Method invoke

chain-test/src/unit/TestChaincode.ts:168–185

* Invokes a chaincode method with write capabilities (submit transaction). * Changes made during invocation are persisted to the state. * * @template T - Expected return type of the invocation * @param method - Name of the contract method to invoke * @param args - Arguments to pass to

(
    method: string,
    ...args: (string | { serialize: () => string })[]
  )

   * @throws Error if the invocation fails
   */
  public async invoke<T = InvokeResponse>(
    method: string,
    ...args: (string | { serialize: () => string })[]
  ): Promise<T> {
    const argsSerialized = args.map((arg) => (typeof arg === "string" ? arg : arg.serialize()));
    const newWrites = {};
    const stub = new TestChaincodeStub([method, ...argsSerialized], this.state, newWrites);
    stub.mockCreator(this.callingUserMsp, this.callingUser);
    const rawResponse = await this.chaincode.Invoke(stub);

    if (rawResponse.status === 200) {
      const stringResponse = rawResponse.payload.toString();
      this.writes.push(newWrites);
      return JSON.parse(stringResponse) as T;
    } else {
      throw rawResponse.message;
    }
  }

  /**
   * Queries a chaincode method with read-only access (evaluate transaction).