获取erc20地址所持有的所有币种
获取erc20地址所持有的所有币种要获取一个以太坊地址持有的所有ERC20代币，有几种方法可以实现：方法一：使用区块链浏览器
[*]Etherscan (https://etherscan.io/)
[*]输入地址后，点击"Token"标签页
[*]可以查看该地址持有的所有ERC20代币及其余额
[*]Ethplorer (https://ethplorer.io/)
[*]专门用于查看地址的Token持有情况
[*]提供更详细的代币信息
方法二：使用API
[*]Etherscan APIjavascript
// 获取地址的ERC20代币余额const apiKey = 'YOUR_API_KEY';const address = '0x...';const url = `https://api.etherscan.io/api?module=account&action=tokentx&address=${address}&startblock=0&endblock=99999999&sort=asc&apikey=${apiKey}`;fetch(url).then(response => response.json()).then(data => console.log(data.result));
[*]Alchemy/Infura APIjavascript
const { Alchemy, Network } = require("alchemy-sdk");const config = {apiKey: "YOUR_API_KEY",network: Network.ETH_MAINNET,};const alchemy = new Alchemy(config);async function getTokenBalances(address) {const balances = await alchemy.core.getTokenBalances(address);console.log(balances);}
方法三：使用Web3库查询javascript
const Web3 = require('web3');const web3 = new Web3('https://mainnet.infura.io/v3/YOUR_PROJECT_ID');// ERC20标准ABI（简化版）const erc20Abi = [{ "constant": true, "inputs": [{"name": "_owner", "type": "address"}, "name": "balanceOf", "outputs": [{"name": "balance", "type": "uint256"}, "type": "function"};async function getTokenBalance(tokenContract, userAddress) {const contract = new web3.eth.Contract(erc20Abi, tokenContract);const balance = await contract.methods.balanceOf(userAddress).call();return balance;}// 示例：查询USDT余额const usdtAddress = '0xdac17f958d2ee523a2206206994597c13d831ec7';const userAddress = '0x...';getTokenBalance(usdtAddress, userAddress).then(console.log);
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