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Use Ethereum

读取链上数据

读取链上数据

调用合约 view 函数

import { createPublicClient, http } from 'viem'
import { mainnet } from 'viem/chains'


const client = createPublicClient({
  chain: mainnet,
  transport: http(),
})


// 读取 ERC-20 余额
const balance = await client.readContract({
  address: '0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48', // USDC
  abi: erc20Abi,
  functionName: 'balanceOf',
  args: ['0x...'],
})

监听事件

// 监听 Transfer 事件
const unwatch = client.watchContractEvent({
  address: '0x...',
  abi,
  eventName: 'Transfer',
  onLogs: (logs) => console.log(logs),
})


// 停止监听
unwatch()

查询历史日志

const logs = await client.getLogs({
  address: '0x...',
  event: parseAbiItem('event Transfer(address indexed from, address indexed to, uint256 value)'),
  fromBlock: 19000000n,
  toBlock: 'latest',
})

延伸阅读