queryfilter not working for me

[Nisthar]

queryFilter doesn't work if i pass 0 to the fromblock. it works if i pass a correct fromblock. idk if its because of loading all the logs or what?

let eventFilter = contract.filters.Transfer()
let events = await contract.queryFilter(eventFilter, 0, 'latest')

[zemse]

When you say it doesn’t not work, do you mean it gives an error or does it give empty array of events?

Early times when blocks were less, you could do this, basically scan all the blocks from 0 to latest. But these days many chains produce lot of blocks, like every sec or even faster. So, it’s very resource consuming for a node to fulfil the queryFilter request (or eth_getLogs RPC which is internally made) that scans all the blocks and hence it has to give an error these days. Using a shorter block range like 10K or 1K should work.

But if it gives an empty array, I think the contract address or network used is incorrect.

[Nisthar]

Yeah it doesn't return any results. It doesn't go past that statement.

[Nisthar]

@zemse it works the first few times. I can get empty array if there's no events. But after a few times, it stops and doesn't do anything.

[ricmoo]

Do you mean the UI freezes and the application halts, when you say “doesn’t go past the statement”? Or that that line is throwing?

[yuetloo]

I have encountered a similar issue recently with getLogs returning an empty array when requesting blocks from 0 to latest against Arbitrum. This was tested against the Infura and Alchemy (with archiving) JsonRpcProvider.

• Using EtherscanProvider, there were logs retrieved from blocks 0 to the latest
• Changing my code to retrieve smaller batches of logs using the alchemy JsonRpcProvider also returned logs

I remembered receiving too many blocks error before but recently it's just an empty array without error. And, I didn't upgrade ethers.js version. So, I think this is more of a node issue rather than ethers.js issue.

Note: I did have to upgrade to ethers.js v5.7.2 to test the EtherscanProvider as the Arbitrum support was only recently added.
As for the JsonRpcProvider tests, my app was using the existing older ethers.js version