如何确保 Web3 / Metamask 识别出我是智能合约所有者？

Question

我正在尝试从我创建并在主网上可用的智能合约中读取一些数据： https://snowtrace.io/address/0x98608c1e3ae104e7a11ea2879b44669a1c38b73d#code

当我尝试通过 Web3 库与我的智能合约交互时，我能够读取所有 public 详细信息，除了一个名为：getCurrentBalance()

这需要所有者许可（我是）。我进行了三重检查以确保我在 Metamask 中使用的是正确的所有者帐户。

这是我的 html 文件：

<!DOCTYPE html>
<html>

<head>
    <title>Web 3 Demo</title>
<script src='node_modules/web3/dist/web3.min.js'></script>
</head>

<body>
    <button onclick="getCurrentBalance();">Get Current Contract Balance</button>
    Status: <span id="status">Loading...</span>
<script type="text/javascript" src="index.js"></script>
</body>

</html>

这是index.js:

// Check metamask installation and connect to site
async function loadWeb3() {
    if (window.ethereum) {
        window.web3 = new Web3(window.ethereum);
        window.ethereum.enable();
    }
}

// In the html file there is a span called status this function updates the print out
function updateStatus(status) {
    const statusEl = document.getElementById('status');
    statusEl.innerHTML = status;
    console.log(status);
}

// This function links to the smart contract for interactions
async function loadContract() {
    return await new window.web3.eth.Contract([{"inputs": [],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"constant":false,"inputs":[{"internalType":"address payable","name":"_liquitdateTo","type":"address"}],"name":"destroySmartContract","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"fundsReceived","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"getCurrentBalance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[],"name":"getFunds","outputs":[],"payable":true,"stateMutability":"payable","type":"function"},{"constant":false,"inputs":[{"internalType":"bool","name":"_bool","type":"bool"}],"name":"pause","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"paused","outputs":[{"internalType":"bool","name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"smartContractAddress","outputs":[{"internalType":"address","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"tresury","outputs":[{"internalType":"address payable","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"}], '0x98608C1e3ae104E7A11EA2879b44669a1c38b73D');
}

// This is the main program function that calls all the previous ones
async function load() {
    await loadWeb3();
    window.contract = await loadContract();
    updateStatus('Ready!');
}

async function getCurrentBalance() {
    updateStatus('fetching...');
    const getCurrentBalance = await window.contract.methods.getCurrentBalance().call();
    updateStatus(`Current Contract Balance: ${getCurrentBalance}`);
}

load();

这是我在控制台中得到的错误：

如何从智能合约中读取getCurrentBalance()？

Answer 1

smart的getCurrentBalance()函数定义为：

function getCurrentBalance() public view returns(uint) {
    require(owner == msg.sender, 'You are not the owner!!!');
    require(paused == false, 'Contract Status: Paused!!!');
    return address(this).balance;
}

在您的情况下，第一个 require() 条件失败并显示“您不是所有者！！！”错误消息，因为调用函数的地址不是 owner 变量中存储的预期值。

系统的解决方案是从 owner 地址调用 getCurrentBalance() 函数：

// where `0x123` is the `owner` address
await window.contract.methods.getCurrentBalance().call({from: '0x123'});

但是，由于该函数实际上只是 returns 合约地址余额，您还可以执行变通方法，直接从区块链查询合约地址余额（无需调用合约函数）：

await web3.eth.getBalance('0x98608C1e3ae104E7A11EA2879b44669a1c38b73D');

如何确保 Web3 / Metamask 识别出我是智能合约所有者？

How to make sure Web3 / Metamask recognize that I am the smart contract owner?

ethereum

smartcontracts

web3

web3js