11.智能合约本地开发部署流程

版权声明：忠于祖国，忠于人民 https://blog.csdn.net/boss2967/article/details/83419771

01. 目录结构

• contracts
• test
• compile.js
• deploy.js
  

02.配置文件

• npm init
• npm install --save solc

03.具体实现

Index.sol

pragma solidity ^0.4.21;


contract Inbox {

    string _message;

    function Inbox(string src) public {
        _message = src;
    }

    function setMessage(string message) {
        _message = message;
    }

    function getMessage() public returns(string) {
        return _message;
    }
}

compile.js

1. 加载编译器

let solc = require('solc')
let fs = require('fs')

2. 获取.sol源码

let sourceInfo = fs.readFileSync('./contracts/Index.sol', 'utf-8');

3. 编译，获取abi,bytecode

module.exports = output.contracts[':Inbox']

deploy.js

1. 引入web3

let Web3 = require('web3')

2. 创建web3实例

web3.setProvider(new Web3.providers.HttpProvider('http://localhost:8545'))

3. 指定服务商

web3.setProvider(new Web3.providers.HttpProvider('http://localhost:8545'))

4. 引用compile.js

let {interface, bytecode} = require('./compile')

5. 部署合约

deploy = async()=>{
    // 需要abi 和bytecode
     try{
         let accounts = await web3.eth.getAccounts()
         console.log("合约地址是：",accounts)
         let contract =  await new web3.eth.Contract(JSON.parse(interface))
         let contractInstance =  await contract.deploy({
             data:bytecode,
             arguments:['HelloWord'],
         }).send({
             from:accounts[0],
             gas:'1000000'
         })
         //***********************1.获取合约的地址，在options里面 .调用setMessage方法*********
         let msg = await contractInstance.methods.getMessage().call({
             from:accounts[0],
         })
         console.log('msg:',msg)
         //***********************2 调用setMessage方法***********************
         let res = await contractInstance.methods.setMessage('nihao').send({
             from:accounts[0],
         })
         console.log("res:",res)
         ////***********************3.调用getMessage方法
          msg = await contractInstance.methods.getMessage().call({
             from:accounts[0]
         })
         console.log("getMessage:",msg)
			//获取合约的地质，在options里面
         console.log('address:',contractInstance.options.address)
     }catch(e){
          console.log(e)
     }
}

6. 调用合约

deploy()

7. 注意事项
   • JSON.parse
   • 构造函数传数组
   • 部署一定要有gas,用单引号，不然矿工懒得理你