Question

我正在开发一个以太坊项目，我想将所有特定的“传输”事件发出的值存储到一个 excel 文件中。我能够写到一定数量的块而不是全部，因为它显示错误：返回错误：查询返回超过 10000 个结果。我正在使用 infura 帐户。我也尝试过 AlchemyAPI 帐户，但遇到了同样的错误，因为它只支持 10K 之前的结果。谁能告诉我如何解决它？或者任何其他支持超过 10000 个结果的网络提供商。

Error: Returned error: query returned more than 10000 results
    at Object.ErrorResponse (/home/admin1/Desktop/Ethereumevents/node_modules/web3-core-helpers/lib/errors.js:28:19)
    at Object.callback (/home/admin1/Desktop/Ethereumevents/node_modules/web3-core-requestmanager/lib/index.js:303:36)
    at /home/admin1/Desktop/Ethereumevents/node_modules/web3-providers-ws/lib/index.js:114:45
    at Array.forEach (<anonymous>)
    at WebsocketProvider._onMessage (/home/admin1/Desktop/Ethereumevents/node_modules/web3-providers-ws/lib/index.js:102:69)
    at W3CWebSocket._dispatchEvent [as dispatchEvent] (/home/admin1/Desktop/Ethereumevents/node_modules/yaeti/lib/EventTarget.js:115:12)
    at W3CWebSocket.onMessage (/home/admin1/Desktop/Ethereumevents/node_modules/websocket/lib/W3CWebSocket.js:234:14)
    at WebSocketConnection.<anonymous> (/home/admin1/Desktop/Ethereumevents/node_modules/websocket/lib/W3CWebSocket.js:205:19)
    at WebSocketConnection.emit (events.js:314:20)
    at WebSocketConnection.processFrame (/home/admin1/Desktop/Ethereumevents/node_modules/websocket/lib/WebSocketConnection.js:554:26)
    at /home/admin1/Desktop/Ethereumevents/node_modules/websocket/lib/WebSocketConnection.js:323:40
    at processTicksAndRejections (internal/process/task_queues.js:79:11) {
  data: null
}

代码如下：

code:

async function write_csv(obj) {
  writer.pipe(fs.createWriteStream('out.csv', { flags: 'a' }));
  console.log("written",obj)
  writer.end();
};

const contract = new web3.eth.Contract(interface, contractAddress);
     
        var Transfer = contract.events.Transfer({fromBlock:5521592}, async function (error, event) {
        console.log(event);
       
  })
  .on('data',async function (event) {console.log("hi",  JSON.stringify(event))

  var res = {From:event.returnValues[0], To:event.returnValues[1], Value:event.returnValues[2]};
  write_csv(res);
  await new Promise(resolve => setTimeout(resolve('done'), 20000));
})
  .on('changed', function (event) {console.log("hi")
  
})
  .on('error', console.error);

Answer 1

您需要对查询进行分页和节流，因为 JSON-RPC 响应有最大大小限制。

不幸的是，由于以太坊 ndf = df.groupby(['Packages']).agg({'Score':'max', 'Date':'max'})[['Score','Date']] ndf = ndf.merge(df, on = ['Packages','Date'], how = 'inner') # Filter out unnecessary columns ndf['Score'] = ndf['Score_x'] # Use Score_x column on the left side (ndf) instead of Score_y on the right side (df) ndf = ndf[['ID', 'Packages', 'Score', 'Date', 'Street']] print(ndf) API 的实现方式很脑残，这是不可能的。 On Web3.py project there is an example query code that can do Ethereum event fetch pagination, throttling and resume queries in the case of errors。该示例还强调了您的代码需要克服的各种障碍。

返回错误：查询返回了 10000 多个结果

1 个答案: