從合約呼叫合約不起作用

下面是一個契約呼叫另一個契約的非常簡單的設置，我不知何故無法讓它工作。

契約C1

pragma solidity ^0.5.0;

contract C1 {
   int public x = 1;

   function setX(int _x) public {
       x = _x;
   }

   function getX() public view returns (int y) {
       return x;
   }
}

契約C2

pragma solidity ^0.5.0;

import { C1 } from './C1.sol';

contract C2 {
   C1 c1;
   constructor(address _c1) public {
       c1 = C1(_c1);
   }

   function setX(int _x) public {
       c1.setX(_x);
   }

   function getX() public view returns (int) {
       c1.getX();
   }
}

在 C1 上呼叫 setX 和 getX 效果很好。但是 C2 方法不起作用。在https://remix.ethereum.org/上 試過 用solidity 編譯器0.5.0 和EVM 版本constantinople 試過。我想我做錯了什麼，但無法弄清楚是什麼。

編輯：添加 JS 程式碼：

'use strict';

const web3 = require("web3");
const solc = require("solc");
const fs = require("fs");

const w3 = new web3(new web3.providers.WebsocketProvider("ws://***.***.***.***:8545"))

// compile contract
const contracts = {
   'C1.sol': {
       content: fs.readFileSync(__dirname + "/C1.sol", "utf-8")
   },
   'C2.sol': {
       content: fs.readFileSync(__dirname + "/C2.sol", "utf-8")
   }
}

const input = {
   language: 'Solidity',
   sources: contracts,
   settings: {
       optimizer: {
           enabled: false
       },
       outputSelection: {
           '*': {
               '*': ["abi", "evm.bytecode"]
           }
       }
   }
}

const parsedOutput = JSON.parse(solc.compile(JSON.stringify(input)));

const compiled = {};
for (let contract in contracts) {
   const name = contract.split(".")[0];
   const output = {};
   output.abi = parsedOutput.contracts[contract][name].abi;
   output.bin = parsedOutput.contracts[contract][name].evm.bytecode.object;
   compiled[name] = output;
}

// console.log(compiled);

// deploy contract

const init = async () => {
   const addresses = await w3.eth.getAccounts();
   console.log(addresses);

   const sendObj = {
       from: addresses[0],
       gas: 450000000
   };
   const callObj = {
       from: addresses[0]
   }

   // deploy C1
   const ct1 = new w3.eth.Contract(compiled["C1"].abi);
   ct1.options.data = "0x" + compiled["C1"].bin;
   const ct1Deployed = await ct1.deploy().send(sendObj);
   console.log(ct1Deployed.options.address);

   const newCt1 = new w3.eth.Contract(compiled["C1"].abi, ct1Deployed.options.address);

   console.log(await newCt1.methods.getX().call(callObj));
   await newCt1.methods.setX(123).send(sendObj);
   console.log(await newCt1.methods.getX().call(callObj));

   // deploy C2
   const ct2 = new w3.eth.Contract(compiled["C2"].abi);
   ct2.options.data = "0x" + compiled["C2"].bin;
   const ct2Deployed = await ct2.deploy({ arguments: [ct1Deployed.options.address] }).send(sendObj);
   console.log(ct2Deployed.options.address);

   const newCt2 = new w3.eth.Contract(compiled["C2"].abi, ct2Deployed.options.address);

   console.log(await newCt2.methods.getX(ct1Deployed.options.address).call(callObj));
   // await newCt2.methods.setX(123).send(sendObj);
   // console.log(await newCt2.methods.getX().call(callObj));
}

init();

您錯過了 中的return關鍵字C2。

function getX() public view returns (int) {
   return c1.getX();
}

此外，在 C1 的 getter 中看到一個變數令人困惑y，這似乎是錯誤的。最好將其刪除，如下所示：

function getX() public view returns (int) {
   return x;
}

引用自：https://ethereum.stackexchange.com/questions/77157