【区块链】Ubuntu以太坊ganache和truffle增加一个新合约，并完成部署

在contracts下新建一个文件mathControl.sol

pragma solidity >=0.4.22 <0.9.0;

contract MathContract {
  function add(uint a,uint b) public pure returns(uint){
    return a+b;
  }

  function sub(uint a,uint b) public pure returns(uint) {
    return a-b;
  }
  function mul(uint a,uint b) public pure returns(uint) {
    return a*b;
  }
}

在migrations下新建一个部署合约的js文件：2_initial_migration.js

//const Migrations = artifacts.require("Migrations");
var Math=artifacts.require("./MathContract.sol");

module.exports = function (deployer) {
  deployer.deploy(Math);
};

在test目录下新建一个执行智能合约的js文件：mathcontract.js

var MathContract=artifacts.require("MathContract")

contract('MathContract',function(accounts){

        it("first",function(){
                return MathContract.deployed().then(function(instance){
                        console.log(instance.address)
                        instance.add(1,1).then(function(result) {
                                console.log(result)
                                assert.equal(result,2,"add prompt");
                        })
                        instance.sub(5,1).then(function(result) {
                                console.log(result)
                                assert.equal(result,4,"sub prompt");
                        })
                        instance.mul(5,2).then(function(result) {
                                console.log(result)
                                assert.equal(result,10,"mul prompt");
                        })

                })

        })
        it("sencode",function(){
                return MathContract.deployed().then(function(instance){
                        console.log(instance.address)
                        instance.add(1,1).then(function(result) {
                                console.log(result.toNumber())
                                assert.equal(result,2,"add prompt");
                        })
                        instance.sub(5,1).then(function(result) {
                                console.log(result.toNumber())
                                assert.equal(result,4,"sub prompt");
                        })
                        instance.mul(5,2).then(function(result) {
                                console.log(result.toNumber())
                                assert.equal(result,10,"mul prompt");
                        })

                })

        })

})

合约编译：

truffle compile

合约部署：

truffle migrate

合约调用：

truffle test ./test/mathcontract.js

运行结果：