使用 web3.js 从交易中获取 USDC（或任何非 ETH 值）

Question

我正在一个小项目上使用 web3.js 库，该项目订阅了 NFT 智能合约上的事件，以通过 OpenSea 跟踪该项目的所有销售。 这在使用 ETH 完成销售时工作正常，但是当使用 OpenSea 提供的另一种支付方式（USDC、DAI、WETH 等）进行销售时，来自 web3.js 的交易价值返回为 0 ，它在 etherscan.io 上也显示 0。 这是代表此问题的示例事务： https://etherscan.io/tx/0x17f050e3fb6d8f0bbb4d9b4e8cd477f8197a87a3a68b360a60a028d7b1037532 。 无论使用哪种货币，关于如何获得正确价值的任何想法？

例如web3.eth.getTransaction('0x17f050e3fb6d8f0bbb4d9b4e8cd477f8197a87a3a68b360a60a028d7b1037532').then((response) => { console.log(response); });

回复

{
  accessList: [],
  blockHash: '0x6140d3cb5c271fb351e0a6e9e35b32cf0607ad526152f40f2d98107a97b0212b',
  blockNumber: 13545512,
  chainId: '0x1',
  from: '0x3F4D7b0Eba8CB40D94713023d9Dc02FdB0a5169C',
  gas: 391246,
  gasPrice: '157998874325',
  hash: '0x17f050e3fb6d8f0bbb4d9b4e8cd477f8197a87a3a68b360a60a028d7b1037532',
  input: '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',
  maxFeePerGas: '201893464202',
  maxPriorityFeePerGas: '1500000000',
  nonce: 19,
  r: '0x4c8e6fbe4a49439d957e0e725f3f7e897329557a972863143ff2a34458ab190',
  s: '0x25afd4caa4cdc1f93923b5f41a89bc191d0e52c27a36e51e3015ed08560fea5d',
  to: '0x7Be8076f4EA4A4AD08075C2508e481d6C946D12b',
  transactionIndex: 328,
  type: 2,
  v: '0x1',
  value: '0'
}

Answer 1

您可以获得包含事件日志的交易收据。 在这种情况下，您正在寻找由 ERC-20 合约发出的Transfer事件，其中 ERC-20 代币发送者与 NFT 接收者相同。

const run = async () => {
    const receipt = await web3.eth.getTransactionReceipt('0x17f050e3fb6d8f0bbb4d9b4e8cd477f8197a87a3a68b360a60a028d7b1037532');
    const nftReceiver = _getNFTReceiver(receipt.logs);

    for (let log of receipt.logs) {
        // keccak256 of "Transfer(address,address,uint256)"
        if (log.topics[0] === '0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef'
            // ERC20 sender (1st param of the Transfer event) is the same as the NFT receiver
            && web3.eth.abi.decodeParameter('address', log.topics[1]).toLowerCase() === nftReceiver.toLowerCase()
            // ERC-20 Transfer returns the value in `data`, while ERC-721 has the same signature but returns empty data
            && log.data !== '0x'
        ) {
            console.log('ERC-20 token contract: ', log.address);
            console.log('ERC-20 token amount (incl. decimals): ', web3.eth.abi.decodeParameter('uint256', log.data));
        }
    }
}

const _getNFTReceiver = (logs) => {
    for (let log of logs) {
        // keccak256 of "Transfer(address,address,uint256)"
        if (log.topics[0] === '0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef'
            // ERC-20 Transfer returns the value in `data`, while ERC-721 has the same signature but returns empty data
            && log.data === '0x'
        ) {
            // 2nd parameter of the `Transfer()` event contains the NFT receiver
            return web3.eth.abi.decodeParameter('address', log.topics[2]);
        }
    }

    return null;
}

run();

印刷：

Token contract:  0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48
Token amount (incl. decimals):  6000000000