[abretonc7s]

Explanation

Lighter retains inactive markets for historical identity and can zero their order minimums and margin fractions. The strict response decoder rejected those retired rows, which prevented otherwise valid active markets from loading.

This change accepts zero constraints only for inactive rows, omits retired markets whose risk metadata cannot produce canonical market data, and preserves inactive rows with valid metadata as delisted. Positions left on retired markets remain readable using their current position leverage as a non-tradable cap. Active markets remain strict and fail closed on zero or malformed constraints.

Validated with:

• 322 focused Lighter service/provider tests
• Full @metamask/perps-controller test suite and Core build
• Targeted ESLint, formatting, and changelog validation
• Mobile yalc integration using package 16.1.0 (yalc.sig ee73aeec8330f58ce0a6e9c6b4cf42a3)
• A 36/36-node iOS recipe covering Lighter and Hyperliquid on mainnet and testnet
• Revalidated Lighter mainnet on iOS mm-1: live markets loaded and the invalid inactive-market metadata error was absent

References

• Related to https://consensyssoftware.atlassian.net/browse/TAT-3863
• Related to https://consensyssoftware.atlassian.net/browse/TAT-3766
• Unblocks feat(perps): integrate Lighter with funded Lite order entry metamask-mobile#34865
• Follow-up to feat(perps-controller): add Lighter perps venue (initial implementation, flag-gated) #9889 and fix(perps-controller): tighten Lighter data validation #10015

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 — not applicable; this change is non-breaking

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Note

Low Risk
Scoped to Lighter public market-metadata parsing and listing; active markets remain fail-closed on bad constraints, with no changes to signing, deposits, or position operations.

Overview
Fixes Lighter market loading when the venue returns inactive perp rows with zeroed minimum order sizes or margin fractions—metadata Lighter keeps for history but that previously made the strict HTTP decoder reject the whole response and block active markets.

LighterClientService now allows zero minimums and margin fractions only when status === 'inactive', with refine validators still requiring positive values for active markets. LighterProvider adds isInactiveMarketWithoutUsableRiskMetadata to drop those retired rows from getMarketDataWithPrices and margin caching, skips them in getMarkets when leverage metadata is omitted (instead of throwing), and still surfaces inactive markets with valid risk data as delisted. Tests cover both omission and preservation paths.

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