fix: Use original tx gas

[dan437]

Explanation

References

Checklist

• I've updated the test suite for new or updated code as appropriate
• I've updated documentation (JSDoc, Markdown, etc.) for new or updated code as appropriate
• I've communicated my changes to consumers by updating changelogs for packages I've changed
• I've introduced breaking changes in this PR and have prepared draft pull requests for clients and consumer packages to resolve them

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Note

Medium Risk
Touches gas-limit selection and batch submission behavior in Relay post-quote flows; incorrect gas propagation could cause failed or suboptimal transactions, but changes are scoped and covered by tests.

Overview
Fixes post-quote Relay batch submission to use the live transaction.txParams.gas for the original (prepended) transaction, ensuring any beforeSign-hook gas updates are respected instead of relying on quoted gasLimits.

Adjusts Relay batch gas estimation to handle EIP-7702 returning a single combined gas limit by expanding it into per-transaction limits (prepending the original tx gas), and updates/extends tests and the package changelog accordingly.

^{Written by Cursor Bugbot for commit e1cbc8b. This will update automatically on new commits. Configure here.}

[cursor]

Mismatched conditions cause incorrect gas removal for relay step

Medium Severity

The isOriginalTx flag checks isPostQuote && index === 0, but the original transaction is only prepended to allParams when isPostQuote && transaction.txParams.to is truthy. If isPostQuote is true but transaction.txParams.to is falsy, the original tx isn't prepended, yet isOriginalTx would still be true for index 0 — incorrectly setting gas to undefined on the first relay step instead.

Additional Locations (1)

• packages/transaction-pay-controller/src/strategy/relay/relay-submit.ts#L235-L236

 

[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.

[cursor]

EIP-7702 expansion unscoped to post-quote flows

Medium Severity

The gas limit expansion in calculateSourceNetworkGasLimitBatch is not scoped to post-quote flows. For non-post-quote calls with 2+ relay params (e.g., approve + deposit) and an EIP-7702 single combined gas limit, params[0] is the first relay step — not the original transaction — so paramGasLimits[0] is the wrong value. The expansion changes gasLimits from [combinedLimit] to [relay1Gas, combinedLimit], which causes the gasLimit7702 check in relay-submit.ts to evaluate to undefined, inadvertently disabling 7702 batch mode for non-post-quote flows.

Additional Locations (1)

• packages/transaction-pay-controller/src/strategy/relay/relay-submit.ts#L322-L326