如何使用 web3Js（>=1.0 版）將參數傳遞給合約建構子

我在https://www.myetherwallet.com/#contracts上，想部署一份合約。

它與帶有沒有參數的建構子的契約一起使用，但我的契約建構子如下所示：

 function CrowdFunding(address _arg1, uint256 _arg2, uint256 _arg3) public {
   arg1 = _arg1;
   arg2 = _arg2;
   arg3 = _arg3;
 }

但是如何傳遞我的論點（arg1、arg2 和 arg3）？我正在使用 web3JS。

如果您使用的是較新版本的 web3（例如 1.0.0 版）：

// example solidity code
function ContractName(address _arg1, uint256 _arg2, uint256 _arg3) public {
   arg1 = _arg1;
   arg2 = _arg2;
   arg3 = _arg3;
 }

使用**web3.eth.abi.encodeParameter()或web3.eth.abi.encodeParameters()**對參數進行編碼並將它們連接到字節碼的末尾。

const Web3 = require("web3");
const solc = require("solc");

// compile the solidity code
let compiled = solc.compile(source);

// save public interface of contract
let abi = JSON.parse(compiled.contracts[":ContractName"].interface)

// create var with contract
let CrowdFunding = new web3.eth.Contract(abi);

let bytecodeWithParameters = compiled.contracts[':ContractName'].bytecode + web3.eth.abi.encodeParameters(['address', 'uint256', 'uint256'], ['0x08cf02070bb9f167556c677da58e6678bbe871fc', '100000000000000000', '10000']).slice(2);
// slice(2) because we want to remove the '0x' at the beginning.

現在，您可以在https://www.myetherwallet.com/#contracts上輸入bytecodeWithParameters進行部署（帶參數）。

試試這個：

let fs = require("fs");
let Web3 = require("web3");

let web3 = new Web3(NODE_ADDRESS);

async function send(transaction) {
   let gas = await transaction.estimateGas({from: PUBLIC_KEY});
   let options = {
       to  : transaction._parent._address,
       data: transaction.encodeABI(),
       gas : gas
   };
   let signedTransaction = await web3.eth.accounts.signTransaction(options, PRIVATE_KEY);
   return await web3.eth.sendSignedTransaction(signedTransaction.rawTransaction);
}

async function deploy(contractName, contractArgs) {
   let abi = fs.readFileSync(contractName + ".abi").toString();
   let bin = fs.readFileSync(contractName + ".bin").toString();
   let contract = new web3.eth.Contract(JSON.parse(abi));
   let handle = await send(contract.deploy({data: "0x" + bin, arguments: contractArgs}));
   console.log(`${contractName} contract deployed at address ${handle.contractAddress}`);
   return new web3.eth.Contract(JSON.parse(abi), handle.contractAddress);
}

使用範例：

let crowdFunding = await deploy("CrowdFunding", [arg1, arg2, arg3]);

引用自：https://ethereum.stackexchange.com/questions/41757