tronWeb如何申请更换合约,请使用html实现
时间: 2023-06-27 18:06:52 浏览: 270
tronweb.7z --uni-app
首先,在html中引入TronWeb的js文件。然后,可以使用TronWeb的API发送TRX或者调用智能合约。以下是一个简单的示例,演示如何使用TronWeb更换智能合约:
```html
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>TronWeb Example</title>
<script src="https://cdn.jsdelivr.net/npm/tronweb@2.9.0/dist/tronweb.min.js"></script>
</head>
<body>
<h1>TronWeb Example</h1>
<p>当前账户地址: <span id="address"></span></p>
<p>当前账户余额: <span id="balance"></span></p>
<p>当前合约地址: <span id="contractAddress"></span></p>
<button onclick="changeContract()">更换合约</button>
<script>
const HttpProvider = TronWeb.providers.HttpProvider;
const fullNode = new HttpProvider('https://api.trongrid.io');
const solidityNode = new HttpProvider('https://api.trongrid.io');
const eventServer = 'https://api.trongrid.io/';
const privateKey = 'your_private_key';
const tronWeb = new TronWeb(fullNode, solidityNode, eventServer, privateKey);
async function init() {
const address = await tronWeb.defaultAddress.base58;
const balance = await tronWeb.trx.getBalance(address);
const contractAddress = 'your_contract_address';
document.getElementById('address').textContent = address;
document.getElementById('balance').textContent = balance;
document.getElementById('contractAddress').textContent = contractAddress;
}
async function changeContract() {
const newContractAddress = 'your_new_contract_address';
const contractInstance = await tronWeb.contract().at(newContractAddress);
document.getElementById('contractAddress').textContent = newContractAddress;
}
window.addEventListener('load', init);
</script>
</body>
</html>
```
在上面的示例中,我们使用TronWeb的API获取当前账户地址、余额和合约地址。然后,当用户点击“更换合约”按钮时,我们使用TronWeb重新实例化合约,并将新的合约地址更新到页面上。
请注意,为了使用TronWeb,你需要一个有效的私钥,以便进行交易和调用智能合约。此外,你还需要使用有效的节点地址和事件服务器地址。
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