# CIP-53: Block gas limit for non-blob transactions

**URL:** <https://forum.celestia.org/t/cip-53-block-gas-limit-for-non-blob-transactions/2324>\
**Category:** Celestia Improvement Proposals (CIPs)\
**Created:** [October 28, 2026, 11:30pm UTC](https://forum.celestia.org/t/cip-53-block-gas-limit-for-non-blob-transactions/2324 "2026-10-28T23:30:14Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![rootulp](https://forum.celestia.org/user_avatar/forum.celestia.org/rootulp/32/926_2.png) [@rootulp](https://forum.celestia.org/u/rootulp)\
**Post date:** [October 28, 2026, 11:30pm UTC](https://forum.celestia.org/t/cip-53-block-gas-limit-for-non-blob-transactions/2324/1 "2026-10-28T23:30:14Z")

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> <https://github.com/celestiaorg/CIPs/pull/411>
>
> \## Summary
> 
> Adds a draft CIP, \`cips/cip-draft\_block\_gas\_limit.md\`, that targets …the v11 network upgrade. It adds a block validity rule: the gas limits declared by non-blob, non-PayForFibre transactions in a block must sum to at most \`MaxSDKGas\` = 100,000,000.
> 
> \### What the CIP covers
> 
> \- \*\*Motivation:\*\* today's per-block limits bound bytes and message counts but not execution work, and \`ConsensusParams.Block.MaxGas\` is -1.
> - A gas limit is a general backstop against gas-metered work that grows with input, including vulnerabilities not yet found.
> - It complements targeted per-message limits rather than replacing them.
> \- \*\*Why not \`ConsensusParams.Block.MaxGas\`:\*\* the SDK block gas meter semantics, building on CIP-11 and CIP-52.
> \- \*\*Specification:\*\* ProcessProposal rejects over-limit blocks, PrepareProposal skips txs that don't fit, and CheckTx rejects a tx whose gas limit alone exceeds the cap. The sum is checked without overflow.
> \- \*\*Rationale:\*\*
> - The cap applies to declared gas.
> - Blob and PayForFibre txs are excluded because blob gas mostly pays for bytes.
> - The value comes from an execution budget of about 0.27–0.5 s.
> - A 3,500-block mainnet sample shows the busiest block declaring 3.3M non-blob gas, about 3% of the limit.
> \- \*\*Security considerations:\*\* how much protection gas pricing gives, proposer behavior, overflow, and block space contention.
> 
> Reference implementation: https://github.com/celestiaorg/celestia-app/pull/8399
> 
> \`discussions-to\` is still TBA; it can point at this PR or a forum thread.
> 
> \### Validation
> 
> \- \`markdownlint --config .markdownlint.yaml\` passes on the new file.
> \- \`mdbook build\` was not run because mdbook is not installed in this environment. \`SUMMARY.md\` and \`README.md\` are unchanged because the CIP is not numbered yet.
> 
> \---
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