What is the limit for querying logs and events in a block range?

Introduction:

The nodes deployed with Chainstack are not rate-limited, except the Rate Limit of 30RPS on Developer plan, as per our documentation in Node and connection limitations page. Please also note that the mentioned article describes technical limitations of HTTPS and WSS connections, they have nothing to do with Rate Limiting.

Block limits for querying:

However, there is still a limit for certain blocks when you query logs or events with methods like eth_getLogs or eth_getFilterLogs. This limit applies to all EVM-based chains across all the plans.

If you try to query a larger range, it might result in an error:

502 Bad Gateway

or

429 Too Many Requests

To ensure maximum reliability for your calls, we have put a limit in place for querying logs and events. This is because these calls consume intense resources. It's important to note that we do not cap the response size or the number of logs, nor do we set any timeout limit on your calls.

If you need to query a large range of blocks, we recommend breaking them down into smaller chunks of 2,000 or less. This approach will increase the likelihood of receiving your response faster without experiencing timeouts. Additionally, you can improve the performance of your calls by adding concurrency, which means making multiple calls simultaneously.

eth_getLogs / getPastEvents block range limitation

Block range limitations apply for the eth_getLogs method on the Harmony and Fantom nodes since their clients have the hard caps natively. The limitations are as follows:

• Fantom — 100 blocks.
• Harmony — 1,024 blocks.

There are no specific limitations to other EVM-compatible protocols, but we recommend staying in the following block ranges per request when using the eth_getLogs method on elastic nodes:

• Ethereum — 2,000 blocks.
• Polygon — 2,000 blocks.
• BNB Smart Chain — 2,000 blocks.
• Avalanche — 100,000 blocks.

Additional notes:

Under the hood, the web3.js getPastEvents method calls eth_getLogs, feel free to read our article.

We also offer Node and Connection customizations. Such as increasing timeouts, max connections, adding more namespaces, etc. See also Node customizations.