- https://blog.csdn.net/qq_40261606/article/details/123249473
编译
点击图中的 “Compile 1_Storage.sol”
存和取一个数的合约，remix自带
pragma solidity >=0.8.2 <0.9.0;
/*** @title Storage* @dev Store & retrieve value in a variable* @custom:dev-run-script ./scripts/deploy_with_ethers.ts*/
contract Storage {uint256 number;function store(uint256 num) public {number = num;}function retrieve() public view returns (uint256){return number;}
}
部署
复制右侧的 WEB3DEPLOY中的代码，node test.js
const {Web3} = require('web3');
const web3 = new Web3('http://192.168.137.131:8545');
var storageContract = new web3.eth.Contract([{"inputs":[],"name":"retrieve","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"num","type":"uint256"}],"name":"store","outputs":[],"stateMutability":"nonpayable","type":"function"
}]);
var storage = storageContract.deploy({data: '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', arguments: []
}).send({from: "0xC2b9f3b30fA3d808002adc50836A28d16c14FaF5", gas: '4700000'}, function (e, contract){console.log(e, contract);if (typeof contract.address !== 'undefined') {console.log('Contract mined! address: ' + contract.address + ' transactionHash: ' + contract.transactionHash);}})
奇怪的是没有打印合约地址，手动查看（合约的那条交易只有FROM 没有TO）
# geth 通过交易 id 找到 contractAddress
> eth.getTransactionReceipt("0xd8fa5bb0052bf19759fed821dc6c8b86bdc70bd8ea31caed92ea36103741048b").contractAddress
"0xb5e4db78acf3a423c7ca5c483064f8d98329b325"
调用
contractABI, contractAddress
const { Web3 } = require('web3');// 连接到以太坊节点
const web3 = new Web3('http://192.168.137.131:8545');var account_1 = "0xC2b9f3b30fA3d808002adc50836A28d16c14FaF5";
var contractAddress = "0xb5e4db78acf3a423c7ca5c483064f8d98329b325";
var contractABI = [{"inputs": [],"name": "retrieve","outputs": [{"internalType": "uint256","name": "","type": "uint256"}],"stateMutability": "view","type": "function"},{"inputs": [{"internalType": "uint256","name": "num","type": "uint256"}],"name": "store","outputs": [],"stateMutability": "nonpayable","type": "function"}
];// 创建智能合约实例
var Storage_Contract = new web3.eth.Contract(contractABI, contractAddress);// 调用 retrieve 方法
// Storage_Contract.methods.retrieve().call({ from: account_1 })// .then((result) => {// console.log("结果_retrieve： " + result);// })// .catch((error) => {// console.error("调用失败：", error);// });// 调用 store 方法，存储数据（例如存储数字 10）
Storage_Contract.methods.store(10).send({ from: account_1 }).then((receipt) => {console.log("结果_store：", receipt);}).catch((error) => {console.error("调用失败：", error);});
在以太坊交易中，input 字段包含了与交易相关的附加数据，通常是调用智能合约函数时传递的数据。对于智能合约的函数调用，这些数据会包括方法的签名（即函数的选择器）和函数参数的编码。具体来说，input 字段通常由两部分组成：
-
方法的选择器（Function Selector）：是函数名称和参数类型的哈希值的前4个字节。例如，函数 store(uint256) 的选择器是 keccak256(‘store(uint256)’) 的前4个字节。
-
编码的函数参数：以太坊采用的是 ABI（Application Binary Interface）编码标准，用于将函数参数转化为字节流。每个参数按照其类型进行编码。
这个 input 字段的含义是：向合约的 store 方法传递一个 uint256 类型的参数，值为 a。
