web3js getPastlog return empty array

Question

i test web3js by geth,i build private net in local.i try to call getPastlog ,but return empty array.

const Web3 = require("web3");
// const web3 = new Web3(new Web3.providers.HttpProvider("https://rinkeby.infura.io/v3/770daaf97ee14e0aa77ac105bbcdd79f"));
const web3 = new Web3(new Web3.providers.HttpProvider("http://127.0.0.1:8545"));

web3.eth.getPastLogs({
    address:"0xF81639558D54a03D6620c5bdb2f1C2e5c87736d0",
    topics: ['0xdd970dd9b5bfe707922155b058a407655cb18288b807e2216442bca8ad83d6b5'] //topics:[web3.utils.sha3("adduintevent(uint256,uint256)")]
})
.then(console.log);

address and topics is right ,because i get them by getPastEvents

contract.getPastEvents('Log', {
    // filter: {myIndexedParam: [20,23], myOtherIndexedParam: '0x123456789...'}, // Using an array means OR: e.g. 20 or 23
    fromBlock: 0,
    toBlock: 'latest'
}, function (error, events) {
    console.log(events[0].raw);
});

===========result ==========
{
  data: '0x00000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000001000000000000000000000000000000000000000000000000000000000000000a54686520576f726c642100000000000000000000000000000000000000000000',
  topics: [
    '0xdd970dd9b5bfe707922155b058a407655cb18288b807e2216442bca8ad83d6b5'
  ]
}

so, i want to konw why i can't get anything by pastlog.Who can help me...

Answer 1

Try to use this syntax:

const Web3 = require('web3');
const node_URL = 'CHAINSTACK_NODE_URL';
const web3 = new Web3(node_URL);

web3.eth.getPastLogs(
  "0xF81639558D54a03D6620c5bdb2f1C2e5c87736d0",
  ["0xdd970dd9b5bfe707922155b058a407655cb18288b807e2216442bca8ad83d6b5"],
  (err, logs) => {
    console.log(logs);
  }
);

And it will return this (only a short sample as it's super long):

 '0x00000000000000000000000000000000000000000000000000000000000017b2'
    ],
    data: '0x',
    blockNumber: 15148918,
    transactionHash: '0x1dc6e2b1b205100f355c9ed23a5692d35814953371f3117c722d2e685434a210',
    transactionIndex: 41,
    blockHash: '0x9740cc9644b12da740fb4bcee5cc7eab47a14a67cac90047bdd38f606af77791',
    logIndex: 95,
    removed: false,
    id: 'log_83c8653c'
  },
  {
    address: '0xdAC17F958D2ee523a2206206994597C13D831ec7',
    topics: [
      '0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef',
      '0x000000000000000000000000b5d85cbf7cb3ee0d56b3bb207d5fc4b82f43f511',
      '0x000000000000000000000000a271fee1580d9eef821c4757fe70ec30a2c0c0f1'
    ],
    data: '0x000000000000000000000000000000000000000000000000000000000ea3d300',
    blockNumber: 15148918,
    transactionHash: '0x845dd44a580847c657e20d1575b4329961b1b53d03aafa6e50fa993bc51f3a2d',
    transactionIndex: 42,
    blockHash: '0x9740cc9644b12da740fb4bcee5cc7eab47a14a67cac90047bdd38f606af77791',
    logIndex: 96,
    removed: false,
    id: 'log_dcfe5163'
  },

You can get more details about this RPC method in the Chainstack docs!

You can use the Node API reference page in the Chainstack docs to find examples of the JSON RPC methods in web3.js, web3.py, eth.rb, and cURL!