以太坊的轉賬分主要分爲爲ETH轉賬、ERC20轉賬這2種，其轉賬流程，如圖(1)所示：

圖(1) 以太坊轉賬流程圖

1、初始化原始交易單rawTx{}

ETH和ERC20這2種類型的代幣，主要區別，發生在第3步"初始化原始的交易單rawTx{}"時，設置to字段和value字段有差別，如下表所示：

rawTx	ETH	ERC20	說明
from	fromAddress	fromAddress	Token發送人
nonce	web3.utils.toHex(nonceNum)	web3.utils.toHex(nonceNum)	區塊的nonce值
gasLimit	web3.utils.toHex(8000000)	web3.utils.toHex(8000000)	區塊的gas個數上限
gasPrice	web3.utils.toHex(10e9)	web3.utils.toHex(10e9)	單步計算所需的gas
to	toAddress	contractAddress	當幣種爲ETH時，填Token接收人；當幣種爲ERC20時，填合約地址
value	web3.utils.toHex(sendNum)	“0x0”	當幣種爲ETH時，填ETH的個數；當幣種爲ERC20時，置空
data	contractObj.methods.transfer(toAddress, sendNum).encodeABI()	contractObj.methods.transfer(toAddress, sendNum).encodeABI()	發送Token，並編碼
chainId	0x04	0x04	網段爲Rinkeby

初始化rawTx{}的代碼對比如下：

圖(2) 初始化rawTx{}

2、查詢餘額

2.1 查詢賬戶的ETH餘額

function getEthBalance(fromAddress, bookmark) {
   
      
    web3.eth.getBalance(fromAddress).then(
        function (wei) {
   
      
            balance = web3.utils.fromWei(wei, 'ether')
            console.log(bookmark + balance);
        }
    )
}

2.2 查詢賬戶的某種ERC20餘額

function getERC20Balance(fromAddress,contractObj,bookmark) {
   
      
    contractObj.methods.balanceOf(fromAddress).call().then(
        function (wei) {
   
      
            balance = web3.utils.fromWei(wei, 'ether');
            console.log(bookmark + balance);
    });
}

對比如下:

圖(3) 獲取ETH或者ERC20的餘額

3、使用web3.js來發送Token

3.1 創建sendToken工程

3.1.1 創建一個文件夾名稱爲sendToken

mkdir sendToken

3.1.2 用npm和truffle初始化該該工程

cd sendToken
npm init -y
truffle init

3.1.3 修改sendToken\package.json文件，改成如下：
//package.json

{
   
       
  "name": "sendToken",
  "version": "1.0.0",
  "description": "",
  "main": "truffle-config.js",
  "directories": {
   
       
    "test": "test"
  },
  "scripts": {
   
       
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "dependencies": {
   
       
    "@openzeppelin/contracts": "^2.5.0",
    "@truffle/hdwallet-provider": "^1.1.1",
    "bignumber": "^1.1.0",
    "bignumber.js": "^8.1.1",
    "chai": "^4.2.0",
    "chai-as-promised": "^7.1.1",
    "eslint": "^5.15.0",
    "ethereumjs-tx": "^1.3.7",
    "request": "^2.88.2",
    "web3": "^1.3.0"
  },
  "devDependencies": {
   
       
    "@babel/core": "^7.12.3",
    "@babel/preset-env": "^7.12.1"
  }
}

3.1.4 安裝依賴包

npm install

3.1.5 新建一個文件夾名稱爲myabi，然後在sendToken\myabi\目錄下，新建一個ZTA_abi.json文件，該文件存放ZTA合約的abi

3.1.6 新建一個文件夾名稱爲projectConfig，然後在sendToken\projectConfig\目下，如下幾個文件:
net.infuraKey 存放Infura節點的Key值
net.mnemonic 存放賬戶的助記詞
net.prikey 存放賬戶的私鑰

3.1.7 整個工程的目錄結構如下:

圖(3) sendToken的目錄結構

3.2 發送ETH

將如下代碼保存到sendToken\test\1.sendEth.js裏，該代碼是發送0.02ETH
//1.sendEth.js

var Tx = require('ethereumjs-tx');
var Web3 = require('web3')

var fs = require('fs');
const infuraKey = fs.readFileSync("./projectConfig/net.infuraKey").toString().trim();
var web3 = new Web3(new Web3.providers.HttpProvider(`https://rinkeby.infura.io/v3/` + infuraKey))

// web3 version 
console.log(`web3 version: ${
   
        web3.version}`)


function getEthBalance(fromAddress, bookmark) {
   
        
    web3.eth.getBalance(fromAddress).then(
        function (wei) {
   
        
            balance = web3.utils.fromWei(wei, 'ether')
            console.log(bookmark + balance);
        }
    )
}

function getPriKey(prikeyPath) {
   
        
    const privKeyFile = fs.readFileSync(prikeyPath).toString().trim();
    const privKey = new Buffer.from(privKeyFile, 'hex');    
    return privKey
}

function getEthRawTx(fromAddress,toAddress,contractObj,sendNum,nonceNum, privKey) {
   
        
    //raw Tx
    var rawTransaction = {
   
        
        "from": fromAddress,
        "nonce": web3.utils.toHex(nonceNum),
        "gasLimit": web3.utils.toHex(8000000),
        "gasPrice": web3.utils.toHex(10e9),
        "to": toAddress,
        "value": web3.utils.toHex(sendNum),
        "data": contractObj.methods.transfer(toAddress, sendNum).encodeABI(),
        "chainId": 0x04 //4:Rinkeby, 3:Ropsten, 1:mainnet
    };

    var tx = new Tx(rawTransaction);
    tx.sign(privKey);
    var serializedTx = tx.serialize();
    return serializedTx;
}

async function signTransaction(fromAddress,toAddress,contractObj,sendNum,nonceNum, privKey) {
   
        
    var serializedTx = getEthRawTx(fromAddress,toAddress,contractObj,sendNum,nonceNum, privKey)

    // Comment out these three lines if you don't really want to send the TX right now
    console.log(`Attempting to send signed tx:  ${
   
        serializedTx.toString('hex')}`);
    var receipt = await web3.eth.sendSignedTransaction('0x' + serializedTx.toString('hex'));
    console.log(`Receipt info:  ${
   
        JSON.stringify(receipt, null, '\t')}`);
}

function sleep(delay) {
   
        
    return new Promise(reslove => {
   
        
      setTimeout(reslove, delay)
    })
}

//an async function 
const sendEth = async () => {
   
        

    //the number of sended token
    //20 milli = 0.02 ether
    var transferAmount = web3.utils.toWei('20', 'milli');

    var myAddress = "0x1d75...a5f";
    var destAddress = "0x8a40....23fb";

    // get the nonce
    var nonceCnt = await web3.eth.getTransactionCount(myAddress);
    console.log(`num transactions so far: ${
   
        nonceCnt}`);


    var abiArray = JSON.parse(fs.readFileSync("./myabi/ZTA_abi.json"));
    var contractAddress = "0xAc194f047E43Ee0Ee10026C0B7AAA66489a0Ec45";
    var contract = new web3.eth.Contract(abiArray, contractAddress, {
   
         from: myAddress });

    // begin eth numbers of myAddress
    await getEthBalance(myAddress, "Balance before send: ");

    const privkey = getPriKey("./projectConfig/net.prikey")
    await signTransaction(myAddress,destAddress,contract,transferAmount,nonceCnt, privkey)

    sleep(100) //100ms

    // end eth numbers of myAddress
    await getEthBalance(myAddress, "Balance After send: ");
}

sendEth();

執行該nodejs腳本

node test\1.sendETH.js

效果如下：

圖(4) 發送0.02個ETH Token

3.3 發送ERC20

將如下代碼保存到sendToken\test\2.sendERC20.js裏，該代碼是發送0.02 ZTA
//2.sendERC20.js

var Tx = require('ethereumjs-tx');
var Web3 = require('web3')

var fs = require('fs');
const infuraKey = fs.readFileSync("./projectConfig/net.infuraKey").toString().trim();
var web3 = new Web3(new Web3.providers.HttpProvider(`https://rinkeby.infura.io/v3/` + infuraKey))

// web3 version 
console.log(`web3 version: ${
   
         web3.version}`)

function getERC20Balance(fromAddress,contractObj,bookmark) {
   
         
    contractObj.methods.balanceOf(fromAddress).call().then(
        function (wei) {
   
         
            balance = web3.utils.fromWei(wei, 'ether');
            console.log(bookmark + balance);
    });
}

function getPriKey(prikeyPath) {
   
         
    const privKeyFile = fs.readFileSync(prikeyPath).toString().trim();
    const privKey = new Buffer.from(privKeyFile, 'hex');    
    return privKey
}


function getERC20RawTx(fromAddress,toAddress,contractAddress,contractObj,sendNum,nonceNum, privKey) {
   
         
    //raw Tx
    var rawTransaction = {
   
         
        "from": fromAddress,
        "nonce": web3.utils.toHex(nonceNum),
        "gasLimit": web3.utils.toHex(8000000),
        "gasPrice": web3.utils.toHex(10e9),
        "to": contractAddress,
        "value": "0x0",
        "data": contractObj.methods.transfer(toAddress, sendNum).encodeABI(),
        "chainId": 0x04 //4:Rinkeby, 3:Ropsten, 1:mainnet
    };

    var tx = new Tx(rawTransaction);
    tx.sign(privKey);
    var serializedTx = tx.serialize();
    return serializedTx;
}

async function signERC20Transaction(fromAddress,toAddress,contractAddress,contractObj,sendNum,nonceNum, privKey) {
   
         
    var serializedTx = getERC20RawTx(fromAddress,toAddress,contractAddress,contractObj,sendNum,nonceNum, privKey)

    // Comment out these three lines if you don't really want to send the TX right now
    console.log(`Attempting to send signed tx:  ${
   
         serializedTx.toString('hex')}`);
    var receipt = await web3.eth.sendSignedTransaction('0x' + serializedTx.toString('hex'));
    console.log(`Receipt info:  ${
   
         JSON.stringify(receipt, null, '\t')}`);
}

function sleep(delay) {
   
         
    return new Promise(reslove => {
   
         
      setTimeout(reslove, delay)
    })
}

//an async function 
const sendERC20 = async () => {
   
         

    //the number of sended token
    //20 milli = 0.02 ether
    var transferAmount = web3.utils.toWei('20', 'milli');

    var myAddress = "0x1d75...a5f";
    var destAddress = "0x8a40....23fb";

    // get the nonce
    var nonceCnt = await web3.eth.getTransactionCount(myAddress);
    console.log(`num transactions so far: ${
   
         nonceCnt}`);

    var abiArray = JSON.parse(fs.readFileSync("./myabi/ZTA_abi.json"));
    var contractAddress = "0xAc194f047E43Ee0Ee10026C0B7AAA66489a0Ec45";
    var contract = new web3.eth.Contract(abiArray, contractAddress, {
   
          from: myAddress });

    // begin token numbers
    await getERC20Balance(myAddress,contract,"Balance before send: ");

    const privkey = getPriKey("./projectConfig/net.prikey")
    await signERC20Transaction(myAddress,destAddress,contractAddress,contract,transferAmount,nonceCnt, privkey)

    sleep(100)  //100ms

    // end token numbers
    await getERC20Balance(myAddress,contract,"Balance before send: ");
}

sendERC20();

執行該nodejs腳本

node test\2.sendERC20.js

效果如下：

圖(5) 發送0.02 ZTA Token

使用web3.js收發ETH或ERC20Token

1、初始化原始交易單rawTx{}

2、查詢餘額

2.1 查詢賬戶的ETH餘額

2.2 查詢賬戶的某種ERC20餘額

3、使用web3.js來發送Token

3.1 創建sendToken工程

3.2 發送ETH

3.3 發送ERC20

PDManer [元數建模]-v4.9.0 發佈：一款簡單好用的數據庫建模平臺

使用neovim打造go ide(支持代碼跳轉, 代碼補全, 實時語法檢查)

cs01 CSS Syntax

挑戰程序設計競賽 2.3章習題 poj 3046 Ant Counting

[MASM拾遺]Offset僞指令

h30 HTML Layout Elements

瞭解顯卡

一款基於C#開發的通訊調試工具（支持Modbus RTU、MQTT調試）

Linux/Golang/glibC系統調用

Shell/Python中的用戶名獲取

Java-JDBC詳解

使用web3.js收發ETH或ERC20Token

【JAVA核心知識】5: JVM的類加載

【塗鴉物聯網足跡】物聯網主流通信方式

看清頭禿元兇，騰訊AI首度揭示真相

https://yachay.unat.edu.pe/blog/index.php?comment_area=format_blog&comment_component=blog&comment_co

linux以太網驅動總結