[matthewwalsh0]

Explanation

The server strategy requests gasless quotes (supportsGasless) whenever the account and source chain support EIP-7702, with no client-side way to turn this off.

This adds a confirmations_pay_extended.payStrategies.server.gaslessEnabled feature flag as a kill switch. It defaults to true, so behaviour is unchanged unless the flag is explicitly set to false. When disabled, server quote requests are sent with supportsGasless: false.

References

• Extracted from feat(transaction-pay-controller): support max quotes in server strategy #11418

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

Low Risk
Default-on flag with a narrow quote-request change; disabling gasless only affects users when ops explicitly set the flag to false.

Overview
Adds a remote feature-flag kill switch so operators can turn off gasless server quotes without a client release.

A new isServerGaslessEnabled() helper reads confirmations_pay_extended.payStrategies.server.gaslessEnabled from RemoteFeatureFlagController and defaults to true, so behavior is unchanged until the flag is set to false. getServerQuotes now gates supportsGasless on that check alongside the existing EIP-7702 account/chain and Polymarket/Hypercore exclusions, so disabled environments send supportsGasless: false on quote requests.

Unit tests cover the flag helper and the server-quotes path when gasless is off; the package changelog documents the flag.

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