使用Web3和Go-ethereum在私有以太坊区块链上进行交易时未捕获（承诺）错误
[英]Uncaught (in promise) Error while opening and doing transaction on private ethereum blockchain using web3 and go-ethereum
问题描述
I am trying to integrate a react app with go-ethereum using web3js. 
我正在尝试使用web3js将React应用程序与以太坊集成。
an event Onsubmit will do the following: 1. Create an account. 事件Onsubmit将执行以下操作：1.创建一个帐户。 2. Open the account. 2.打开帐户。 3. Approve a smart contract with the created account. 3.使用创建的帐户批准智能合约。
Here is my code 这是我的代码
import React, { Component } from 'react';
import './App.css';
import web3 from './web3';
.... ....
class App extends Component {
constructor(props){
super(props);
this.state = {requester : '', receiver:'', balance: '', message:''};
}
async componentDidMount(){
const requester = await auth.methods.requester().call();
const receiver = await auth.methods.receiver().call();
const approvers = await auth.methods.approvers(0).call();
const balance = await web3.eth.getBalance(auth.options.address);
this.setState({requester,receiver,balance});
}
onSubmit = async (event)=>{
event.preventDefault();
console.log('Approving the smart contract ..... Mining in process ! ');
var pass = "xxxxxxx"
var newaccount = web3.eth.personal.newAccount(pass);
var promise1 = Promise.resolve(newaccount);
promise1.then(function(value) {
var accountnumber = value;
console.log(accountnumber);
web3.eth.personal.unlockAccount(accountnumber,pass, 1500);
auth.methods.approve().send({gas: '1000000',from: accountnumber});
console.log('Smart Contract approved ! ');
});
};
The account is getting created but while doing the transaction I am receiving the following error. 正在创建帐户，但是在进行交易时，我收到以下错误。
Approving the smart contract ..... Mining in process !
0x98f76b2673d545F55c0ff1e961f15EF0a7DfBaD3
App.js:71 Smart Contract App.js：71个智能合约
approved !
Edit: Changed the code to catch the errors 编辑：更改代码以捕获错误
web3.eth.personal.unlockAccount(accountnumber,pass, 1500, function(err, result){
if(err){
alert("Error"+ err);
return;}
alert("Account Opening: "+ result);});
..... .....
auth.methods.approve().send({gas: '1000000',from: accountnumber}, function(err, result){
if(err){
alert("Error"+ err);
return;}
alert("Account address: "+ result);
console.log('Smart Contract approved ! ');});
The web3.eth.personal.unlockAccount is returning "true" but the still the auth.methods.approve is giving me the error. web3.eth.personal.unlockAccount返回“ true”，但是auth.methods.approve仍然给我错误。
1 个解决方案
解决方案1
0 2019-07-28 07:57:01
So, after some major changes to the code, I am able to do the following from an onSubmit event on a react app. 因此，在对代码进行了一些重大更改之后，我能够通过react应用程序上的onSubmit事件执行以下操作。
- Create an account. 创建一个帐户。
- Transfer some gas to it. 向其中转移一些气体。
- Unlock the account. 解锁帐户。
- Sign a contract with the account. 与该帐户签订合同。
Here is the code 这是代码
onSubmit = async (event)=>{
event.preventDefault();
console.log('Approving the smart contract ..... Mining in process ! ');
var pass = "passsword1"
var newaccount = web3.eth.personal.newAccount(pass);
var promise1 = Promise.resolve(newaccount);
promise1.then(function(value) {
var accountnumber = value;
console.log(accountnumber);
web3.eth.personal.unlockAccount('0x197022acd263e8be0f6b65b10d1e5cdbaa244c17',"*****", 1500, function(err, result){
if(err){
alert("Error"+ err);
return;
}else {
alert("Parent Opening: "+ result);
web3.eth.sendTransaction({
from: "0x197022acd263e8be0f6b65b10d1e5cdbaa244c17",
to: accountnumber,
value: '100000000000000000',
}, function(err, transactionHash) {
if (err) {
console.log(err);
} else {
web3.eth.personal.unlockAccount(accountnumber,pass, 1500, function(err, result){
if(err){
alert("Error"+ err);
return;
}else{
console.log(web3.eth.getBalance(accountnumber));
alert("Child Opening: "+ result);
auth.methods.approve().send({gas: '20000000',from: accountnumber}, function(err, result){
if(err){
alert("Error"+ err);
return;
}else{
console.log("Account address: "+ result);
console.log('Smart Contract approved ! ');
}
});
}
});
}
});
}
});
};
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