通过javascript (web3.js)从部署的智能契约中调用特定的稳固功能

Question

我尝试通过react/javascript(web3.js)和Metamask调用Synthetix合同中的transferMargin()函数。我想在Button上使用，单击部署的智能契约中的transferMargin函数，但是它不能工作，我不知道我的代码有什么问题，我从契约和地址复制了完整的ABI。

这是我的密码：

import react, { useState } from "react";
import  { Component } from 'react';
import Web3 from 'web3'


export default function KwentaOptimism()
{

let provider = window.ethereum;
let selectedAccount;


if (typeof provider !== 'undefined') {  
    provider
    .request({method: 'eth_requestAccounts' })
    .then((accounts) => {
    selectedAccount = accounts[0];
    console.log(`Selected account is ${selectedAccount}`);
    })
                                                            }
                                                            
                                                            
const web3 = new Web3(provider);


async function loadContract(){

    let address = "0x1e28378F64bC04E872a9D01Eb261926717346F98";
    let chainlinkFutureContractABI = [{"constant":false,"inputs":[{"internalType":"int256","name":"marginDelta","type":"int256"}],"name":"transferMargin","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"}];
    

    var Contract = require('web3-eth-contract');
    var chainlinkFutureContract =  new Contract(chainlinkFutureContractABI, address);

    return await chainlinkFutureContract;

}


async function openLong(){
    let linkContract = await loadContract();
    linkContract.methods.transferMargin("100000000000000000000").send({from: '0xce05626e35c053995d4988b75af85e2eb7251b3c'});        



}




return(


<div>
    <br/>
    <button onclick = {openLong()}>Chainlink Long</button>
    
    
    
</div>

)


}

控制台错误消失了，但是onclick函数openLong()在我启动服务器或刷新页面时会自动地被调用。但是，只有当我单击"Chainlink Long“按钮时，才应该调用该函数。为什么会有这种奇怪的行为？

Answer 1

这是因为当您使用.call()时，您正在尝试使用.send()调用智能契约函数。

所以你应该试着用

linkContract.methods.transferMargin("100000000000000000000").send();

在这里，您可以阅读每个用例的文档：

https://web3js.readthedocs.io/en/v1.2.11/web3-eth-contract.html#methods-mymethod-call

https://web3js.readthedocs.io/en/v1.2.11/web3-eth-contract.html#methods-mymethod-send