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问如何确定用于web3.eth.abi.decodeLog的ABI？
EN

Ethereum用户

提问于 2021-05-16 16:42:53

回答 1查看 1.6K关注 0票数 5

这是如何在事务中识别令牌传输？的后续报道。

我有一个事务，它会导致令牌的转移。

From PancakeSwap: Router v2
To 0xd423fde466315d45fb0da457df28d5eeb92be580
For 0.005 ($2.97) Wrapped BNB (WBNB)

From 0xd423fde466315d45fb0da457df28d5eeb92be580
To 0xb54eb0cc6457e9d74e20672d8961fad3cde4511c
For 0.154823285118196657 ($2.94) Bogged Finan... (BOG)

我可以使用getTransactionReceipt访问事务日志。

{
  blockHash: '0x7a3e03a2eaaf39ba85e5513205545d2509c24e8a58f03bb77d82f136f7028697',
  blockNumber: 7460735,
  contractAddress: null,
  cumulativeGasUsed: '39606975',
  from: '0xb54eb0cc6457e9d74e20672d8961fad3cde4511c',
  gasUsed: '292724',
  logs: [
    {
      address: '0xbb4CdB9CBd36B01bD1cBaEBF2De08d9173bc095c',
      topics: [
        '0xe1fffcc4923d04b559f4d29a8bfc6cda04eb5b0d3c460751c2402c5c5cc9109c',
        '0x00000000000000000000000010ed43c718714eb63d5aa57b78b54704e256024e'
      ],
      data: '0x0000000000000000000000000000000000000000000000000011c37937e08000',
      blockNumber: 7460735,
      transactionHash: '0xcf95271d63836f17c0c3a7beda7df2ea7029ce9161dc6808da86f5f9ce740830',
      transactionIndex: 265,
      blockHash: '0x7a3e03a2eaaf39ba85e5513205545d2509c24e8a58f03bb77d82f136f7028697',
      logIndex: 1007,
      removed: false,
      id: 'log_9d934f9a'
    },
    {
      address: '0xbb4CdB9CBd36B01bD1cBaEBF2De08d9173bc095c',
      topics: [
        '0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef',
        '0x00000000000000000000000010ed43c718714eb63d5aa57b78b54704e256024e',
        '0x000000000000000000000000d423fde466315d45fb0da457df28d5eeb92be580'
      ],
      data: '0x0000000000000000000000000000000000000000000000000011c37937e08000',
      blockNumber: 7460735,
      transactionHash: '0xcf95271d63836f17c0c3a7beda7df2ea7029ce9161dc6808da86f5f9ce740830',
      transactionIndex: 265,
      blockHash: '0x7a3e03a2eaaf39ba85e5513205545d2509c24e8a58f03bb77d82f136f7028697',
      logIndex: 1008,
      removed: false,
      id: 'log_f759d019'
    },
    {
      address: '0xD7B729ef857Aa773f47D37088A1181bB3fbF0099',
      topics: [
        '0x63be20cc905d5ba0cf65db405c4999f99f2575e521875f13a8009d6eed7a09d9'
      ],
      data: '0x000000000000000000000000d423fde466315d45fb0da457df28d5eeb92be580000000000000000000000000000000000000000000000000000aa739b8dd5525',
      blockNumber: 7460735,
      transactionHash: '0xcf95271d63836f17c0c3a7beda7df2ea7029ce9161dc6808da86f5f9ce740830',
      transactionIndex: 265,
      blockHash: '0x7a3e03a2eaaf39ba85e5513205545d2509c24e8a58f03bb77d82f136f7028697',
      logIndex: 1009,
      removed: false,
      id: 'log_e07c5a40'
    },
    {
      address: '0xD7B729ef857Aa773f47D37088A1181bB3fbF0099',
      topics: [
        '0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef',
        '0x000000000000000000000000d423fde466315d45fb0da457df28d5eeb92be580',
        '0x000000000000000000000000b54eb0cc6457e9d74e20672d8961fad3cde4511c'
      ],
      data: '0x00000000000000000000000000000000000000000000000002260af5206ddbb1',
      blockNumber: 7460735,
      transactionHash: '0xcf95271d63836f17c0c3a7beda7df2ea7029ce9161dc6808da86f5f9ce740830',
      transactionIndex: 265,
      blockHash: '0x7a3e03a2eaaf39ba85e5513205545d2509c24e8a58f03bb77d82f136f7028697',
      logIndex: 1010,
      removed: false,
      id: 'log_4051d23e'
    },
    {
      address: '0xD423fDe466315D45fB0da457dF28D5EEB92be580',
      topics: [
        '0x1c411e9a96e071241c2f21f7726b17ae89e3cab4c78be50e062b03a9fffbbad1'
      ],
      data: '0x0000000000000000000000000000000000000000000000257558ffc7c1bb7c9d0000000000000000000000000000000000000000000004a14e4339975756b2ea',
      blockNumber: 7460735,
      transactionHash: '0xcf95271d63836f17c0c3a7beda7df2ea7029ce9161dc6808da86f5f9ce740830',
      transactionIndex: 265,
      blockHash: '0x7a3e03a2eaaf39ba85e5513205545d2509c24e8a58f03bb77d82f136f7028697',
      logIndex: 1011,
      removed: false,
      id: 'log_382fd81b'
    },
    {
      address: '0xD423fDe466315D45fB0da457dF28D5EEB92be580',
      topics: [
        '0xd78ad95fa46c994b6551d0da85fc275fe613ce37657fb8d5e3d130840159d822',
        '0x00000000000000000000000010ed43c718714eb63d5aa57b78b54704e256024e',
        '0x000000000000000000000000b54eb0cc6457e9d74e20672d8961fad3cde4511c'
      ],
      data: '0x0000000000000000000000000000000000000000000000000011c37937e08000000000000000000000000000000000000000000000000000000aa739b8dd552600000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000230b22ed94b30d7',
      blockNumber: 7460735,
      transactionHash: '0xcf95271d63836f17c0c3a7beda7df2ea7029ce9161dc6808da86f5f9ce740830',
      transactionIndex: 265,
      blockHash: '0x7a3e03a2eaaf39ba85e5513205545d2509c24e8a58f03bb77d82f136f7028697',
      logIndex: 1012,
      removed: false,
      id: 'log_abf4a762'
    }
  ],
  logsBloom: '0x002002000000000000000000800000000000000000000000000000000000000000000000000000000000000000000000000000020400000000000000000000000000401000000000008000080000002000000000000000000004000080000000100000000000000002000000000000000000000000000000000000100000000000000000000000000040000000000000002400010000000800000040000000000000000c0000000000000000020000000000000000000400000000000000000000000002000000000000000000020080000000000000001000000000000080000080000000000000020000000000000000000000000000400000000000000000',
  status: true,
  to: '0x10ed43c718714eb63d5aa57b78b54704e256024e',
  transactionHash: '0xcf95271d63836f17c0c3a7beda7df2ea7029ce9161dc6808da86f5f9ce740830',
  transactionIndex: 265
}

事实上，事件是不可读的；我需要对它们进行解码，据我所知，我应该使用web3js web3.eth.abi.decodeLog(inputs, hexString, topics)。但是，我不清楚如何获得inputs值。

据我所知，产生事件的必须是合同的ABI，例如，在发生事件时：

{
  address: '0xbb4CdB9CBd36B01bD1cBaEBF2De08d9173bc095c',
  topics: [
    '0xe1fffcc4923d04b559f4d29a8bfc6cda04eb5b0d3c460751c2402c5c5cc9109c',
    '0x00000000000000000000000010ed43c718714eb63d5aa57b78b54704e256024e'
  ],
  data: '0x0000000000000000000000000000000000000000000000000011c37937e08000',
  blockNumber: 7460735,
  transactionHash: '0xcf95271d63836f17c0c3a7beda7df2ea7029ce9161dc6808da86f5f9ce740830',
  transactionIndex: 265,
  blockHash: '0x7a3e03a2eaaf39ba85e5513205545d2509c24e8a58f03bb77d82f136f7028697',
  logIndex: 1007,
  removed: false,
  id: 'log_9d934f9a'
}

我需要得到合同0xbb4CdB9CBd36B01bD1cBaEBF2De08d9173bc095c的ABI。

我试过：

web3.eth.abi.decodeLog(
  abi,
  '0x0000000000000000000000000000000000000000000000000011c37937e08000',
  [
    '0xe1fffcc4923d04b559f4d29a8bfc6cda04eb5b0d3c460751c2402c5c5cc9109c',
    '0x00000000000000000000000010ed43c718714eb63d5aa57b78b54704e256024e',
  ],
);

但是，这产生了错误：

错误:无效类型(argument=" type "，value="_factory"，code=INVALID_ARGUMENT，version=abi/5.0.7)

似乎我提供了错误的价值。

我怎么知道我用什么ABI来解码这个日志呢？

web3js

logs

回答 1

Ethereum用户

发布于 2021-05-16 17:22:07

这不是一个完整的答案，但这是我到目前为止所得到的。

如果您查看契约0xbb4CdB9CBd36B01bD1cBaEBF2De08d9173bc095c代码，它看起来就像实现了BEP20 20接口。我不知道如何以编程方式确定这一点，但情况似乎是这样的。

我查找了BEP20 ABI并使用它构造了web3.eth.Contract。

const contract = new web3.eth.Contract(bep20, '0xbb4CdB9CBd36B01bD1cBaEBF2De08d9173bc095c');

然后提取描述事件的ABI令牌：

const knownEventTokens = contract.options.jsonInterface.filter((token) => {
  return token.type === 'event';
});

如果您研究knownEventTokens的值，则令牌现在具有一个signature属性：

[
  {
    anonymous: false,
    inputs: [
      { indexed: true, name: 'owner', type: 'address' },
      { indexed: true, name: 'spender', type: 'address' },
      { indexed: false, name: 'value', type: 'uint256' }
    ],
    name: 'Approval',
    type: 'event',
    constant: undefined,
    payable: undefined,
    signature: '0x8c5be1e5ebec7d5bd14f71427d1e84f3dd0314c0f7b2291e5b200ac8c7c3b925'
  },
  {
    anonymous: false,
    inputs: [
      { indexed: true, name: 'from', type: 'address' },
      { indexed: true, name: 'to', type: 'address' },
      { indexed: false, name: 'value', type: 'uint256' }
    ],
    name: 'Transfer',
    type: 'event',
    constant: undefined,
    payable: undefined,
    signature: '0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef'
  }
]

据我所知，只要签名与日志事件中的第一个主题匹配，那么inputs就可以用于解码日志事件值。

const events = [
  {
    address: '0xbb4CdB9CBd36B01bD1cBaEBF2De08d9173bc095c',
    blockHash: '0xbeecdeddd358fca1df274a2545ce5b55cf1938faa377b11c0f78c638d4734868',
    blockNumber: 7_463_306,
    data: '0x000000000000000000000000000000000000000000000000002386f26fc10000',
    id: 'log_041e02ed',
    logIndex: 143,
    removed: false,
    topics: [
      '0xe1fffcc4923d04b559f4d29a8bfc6cda04eb5b0d3c460751c2402c5c5cc9109c',
      '0x00000000000000000000000010ed43c718714eb63d5aa57b78b54704e256024e',
    ],
    transactionHash: '0xea00edb3e568701901b56c37c4b185be66dd5bc6398cf3f9298e8542091421f1',
    transactionIndex: 53,
  },
  {
    address: '0xbb4CdB9CBd36B01bD1cBaEBF2De08d9173bc095c',
    blockHash: '0xbeecdeddd358fca1df274a2545ce5b55cf1938faa377b11c0f78c638d4734868',
    blockNumber: 7_463_306,
    data: '0x000000000000000000000000000000000000000000000000002386f26fc10000',
    id: 'log_cdebb74e',
    logIndex: 144,
    removed: false,
    topics: [
      '0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef',
      '0x00000000000000000000000010ed43c718714eb63d5aa57b78b54704e256024e',
      '0x000000000000000000000000ed726e312afd8f856ab96170fd7225c8cb731f05',
    ],
    transactionHash: '0xea00edb3e568701901b56c37c4b185be66dd5bc6398cf3f9298e8542091421f1',
    transactionIndex: 53,
  },
  {
    address: '0xA528Ed9059e3D418324371C011b7bff8a1c838EB',
    blockHash: '0xbeecdeddd358fca1df274a2545ce5b55cf1938faa377b11c0f78c638d4734868',
    blockNumber: 7_463_306,
    data: '0x0000000000000000000000000000000000000000000000de45e400f02a502361',
    id: 'log_b6e3762a',
    logIndex: 145,
    removed: false,
    topics: [
      '0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef',
      '0x000000000000000000000000ed726e312afd8f856ab96170fd7225c8cb731f05',
      '0x0000000000000000000000008e622e3c0c46b20e96ce61e3ce0180fd2fb5baa2',
    ],
    transactionHash: '0xea00edb3e568701901b56c37c4b185be66dd5bc6398cf3f9298e8542091421f1',
    transactionIndex: 53,
  },
  {
    address: '0xeD726e312AfD8f856AB96170fd7225c8cb731f05',
    blockHash: '0xbeecdeddd358fca1df274a2545ce5b55cf1938faa377b11c0f78c638d4734868',
    blockNumber: 7_463_306,
    data: '0x00000000000000000000000000000000000000000000ca2de3365dab3b230ce40000000000000000000000000000000000000000000000001d24b2dfac520000',
    id: 'log_5e101161',
    logIndex: 146,
    removed: false,
    topics: [
      '0x1c411e9a96e071241c2f21f7726b17ae89e3cab4c78be50e062b03a9fffbbad1',
    ],
    transactionHash: '0xea00edb3e568701901b56c37c4b185be66dd5bc6398cf3f9298e8542091421f1',
    transactionIndex: 53,
  },
  {
    address: '0xeD726e312AfD8f856AB96170fd7225c8cb731f05',
    blockHash: '0xbeecdeddd358fca1df274a2545ce5b55cf1938faa377b11c0f78c638d4734868',
    blockNumber: 7_463_306,
    data: '0x00000000000000000000000000000000000000000000000bca378b643e734cc5000000000000000000000000000000000000000000000000002386f26fc100000000000000000000000000000000000000000000000000f6f852abb584590add0000000000000000000000000000000000000000000000000000000000000000',
    id: 'log_1b3a7700',
    logIndex: 147,
    removed: false,
    topics: [
      '0xd78ad95fa46c994b6551d0da85fc275fe613ce37657fb8d5e3d130840159d822',
      '0x00000000000000000000000010ed43c718714eb63d5aa57b78b54704e256024e',
      '0x0000000000000000000000008e622e3c0c46b20e96ce61e3ce0180fd2fb5baa2',
    ],
    transactionHash: '0xea00edb3e568701901b56c37c4b185be66dd5bc6398cf3f9298e8542091421f1',
    transactionIndex: 53,
  },
];

for (const event of events) {
  const eventToken = knownEventTokens.find((knownEventToken) => {
    return knownEventToken.signature === event.topics[0];
  });

  if (!eventToken) {
    console.log('cannot process log %d', event.logIndex);

    continue;
  }

  console.log({
    eventToken,
    values: web3.eth.abi.decodeLog(
      eventToken.inputs,
      event.data,
      event.topics.slice(1),
    ),
  });
}

这意味着：

cannot process log 143
{
  eventToken: {
    anonymous: false,
    inputs: [
      { indexed: true, name: 'from', type: 'address' },
      { indexed: true, name: 'to', type: 'address' },
      { indexed: false, name: 'value', type: 'uint256' }
    ],
    name: 'Transfer',
    type: 'event',
    constant: undefined,
    payable: undefined,
    signature: '0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef'
  },
  values: Result {
    '0': '0x10ED43C718714eb63d5aA57B78B54704E256024E',
    '1': '0xeD726e312AfD8f856AB96170fd7225c8cb731f05',
    '2': '10000000000000000',
    __length__: 3,
    from: '0x10ED43C718714eb63d5aA57B78B54704E256024E',
    to: '0xeD726e312AfD8f856AB96170fd7225c8cb731f05',
    value: '10000000000000000'
  }
}
{
  eventToken: {
    anonymous: false,
    inputs: [
      { indexed: true, name: 'from', type: 'address' },
      { indexed: true, name: 'to', type: 'address' },
      { indexed: false, name: 'value', type: 'uint256' }
    ],
    name: 'Transfer',
    type: 'event',
    constant: undefined,
    payable: undefined,
    signature: '0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef'
  },
  values: Result {
    '0': '0xeD726e312AfD8f856AB96170fd7225c8cb731f05',
    '1': '0x8e622e3c0c46B20e96cE61E3Ce0180Fd2fb5bAA2',
    '2': '4100213335678329561953',
    __length__: 3,
    from: '0xeD726e312AfD8f856AB96170fd7225c8cb731f05',
    to: '0x8e622e3c0c46B20e96cE61E3Ce0180Fd2fb5bAA2',
    value: '4100213335678329561953'
  }
}
cannot process log 146
cannot process log 147
https://quiet-black-snowflake.bsc.quiknode.pro/3650b4c6695bbc00b5aaf2bbc6bf794e447538a2/
(node:75758) Warning: Setting the NODE_TLS_REJECT_UNAUTHORIZED environment variable to '0' makes TLS connections and HTTPS requests insecure by disabling certificate verification.
(Use `node --trace-warnings ...` to show where the warning was created)
^[[A^C
gke_applaudience_europe-west4-c_juice-boost (dxcoin) in dxcoin-api on master [$✘!+?] took 6m31s
12:18:41 ➜ babel-node src/bin/test.js | roarr
[
  {
    anonymous: false,
    inputs: [
      { indexed: true, name: 'owner', type: 'address' },
      { indexed: true, name: 'spender', type: 'address' },
      { indexed: false, name: 'value', type: 'uint256' }
    ],
    name: 'Approval',
    type: 'event',
    constant: undefined,
    payable: undefined,
    signature: '0x8c5be1e5ebec7d5bd14f71427d1e84f3dd0314c0f7b2291e5b200ac8c7c3b925'
  },
  {
    anonymous: false,
    inputs: [
      { indexed: true, name: 'from', type: 'address' },
      { indexed: true, name: 'to', type: 'address' },
      { indexed: false, name: 'value', type: 'uint256' }
    ],
    name: 'Transfer',
    type: 'event',
    constant: undefined,
    payable: undefined,
    signature: '0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef'
  }
]
cannot process log 143
{
  eventToken: {
    anonymous: false,
    inputs: [
      { indexed: true, name: 'from', type: 'address' },
      { indexed: true, name: 'to', type: 'address' },
      { indexed: false, name: 'value', type: 'uint256' }
    ],
    name: 'Transfer',
    type: 'event',
    constant: undefined,
    payable: undefined,
    signature: '0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef'
  },
  values: Result {
    '0': '0x10ED43C718714eb63d5aA57B78B54704E256024E',
    '1': '0xeD726e312AfD8f856AB96170fd7225c8cb731f05',
    '2': '10000000000000000',
    __length__: 3,
    from: '0x10ED43C718714eb63d5aA57B78B54704E256024E',
    to: '0xeD726e312AfD8f856AB96170fd7225c8cb731f05',
    value: '10000000000000000'
  }
}
{
  eventToken: {
    anonymous: false,
    inputs: [
      { indexed: true, name: 'from', type: 'address' },
      { indexed: true, name: 'to', type: 'address' },
      { indexed: false, name: 'value', type: 'uint256' }
    ],
    name: 'Transfer',
    type: 'event',
    constant: undefined,
    payable: undefined,
    signature: '0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef'
  },
  values: Result {
    '0': '0xeD726e312AfD8f856AB96170fd7225c8cb731f05',
    '1': '0x8e622e3c0c46B20e96cE61E3Ce0180Fd2fb5bAA2',
    '2': '4100213335678329561953',
    __length__: 3,
    from: '0xeD726e312AfD8f856AB96170fd7225c8cb731f05',
    to: '0x8e622e3c0c46B20e96cE61E3Ce0180Fd2fb5bAA2',
    value: '4100213335678329561953'
  }
}

这对于我的用例来说已经足够好了。不过，我不明白如何：

在处理任意事件时，人们如何知道使用哪种契约？
在我们的例子中，我们不能处理一些日志事件。BEP20似乎没有涵盖这些事件。我怎么找出如何处理它们？

票数 2

页面原文内容由Ethereum提供。腾讯云小微IT领域专用引擎提供翻译支持

原文链接：

https://ethereum.stackexchange.com/questions/99071

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