E2E Test Selection:
The changes are confined to Perps-specific files:

1. usePerpsFlipPosition.ts: Removed duplicate Logger.error call from the UI hook's error handler. Error reporting is now consolidated at the controller layer (TradingService). No functional logic changes — the hook still shows toasts and calls onError callbacks correctly.

2. TradingService.ts: Added logger.error calls for non-throwing failure results in cancelOrder, cancelOrders (batch), closePosition, closePositions (batch), and updatePositionTPSL. These are purely observability improvements — no changes to return values, state management, or trading logic.

3. Both test files update unit tests to reflect the new error reporting architecture.

Risk: Low — these are error logging/observability changes only. No functional behavior changes to trading operations, no UI rendering changes, no shared component modifications.

Tag selection rationale:

• SmokePerps: Primary tag — changes directly affect Perps trading service (TradingService) and Perps UI hook (usePerpsFlipPosition). Need to verify the flip position, cancel order, close position, and TPSL flows still work correctly end-to-end.
• SmokeWalletPlatform: Required per SmokePerps tag description — Perps is a section inside the Trending tab, so SmokeWalletPlatform must be included.
• SmokeConfirmations: Required per SmokePerps tag description — Add Funds deposits and position management are on-chain transactions that go through confirmations.

No other tags are warranted as the changes are isolated to Perps functionality with no impact on accounts, identity, network, browser, snaps, swaps, or other features.

Performance Test Selection:
The changes touch TradingService.ts which is the core trading service for Perps. While the changes are purely error logging additions (no functional logic changes), running @PerformancePreps is a conservative choice to ensure the added logger.error calls in hot paths (cancelOrder, closePosition, etc.) don't introduce any measurable performance regression. However, since these are only error-path additions (not in the success/happy path), the actual performance impact is negligible. Selecting @PerformancePreps as a precaution given TradingService is a core Perps component.

Recipe Coverage

Skipped (standard-tier, skip-internal-logging-only). All claims concern internal Sentry/logger behavior with no UI surface.

Overall recipe coverage: 0/3 ACs PROVEN (all verified via code review + tests)
Untestable: 1, 2, 3 — all claims are about internal logger.error behavior with no UI surface; unit tests are the correct proof

Prior Reviews

No human reviews yet.

Acceptance Criteria Validation

Code Quality

• Pattern adherence: Follows codebase conventions. Uses ensureError for string→Error conversion, #getErrorContext for lightweight context.
• Complexity: Appropriate — each change is a single logger.error call at the right place.
• Type safety: No type issues introduced. ensureError correctly handles string | undefined error values.
• Error handling: Adequate — errors are logged with method name, symbol, and provider error details.
• Anti-pattern findings: None. No magic strings, no as any, no eslint-disable, no console.log.

Fix Quality

• Best approach: Yes — this is the minimal, correct fix. Each added logger.error call follows the established pattern. The dedup in the UI hook is the right layer boundary: controller owns Sentry, UI owns toasts.
• Would not ship: Nothing blocks merge.
• Test quality: Strong. Tests assert the exact arguments passed to logger.error (Error message + context object). Negative tests verify batch logging does NOT fire on fallback paths. The usePerpsFlipPosition test asserts Logger.error is NOT called, which would fail if the removal is reverted.
• Brittleness: Low. All logging uses stable internal APIs (#deps.logger.error, #getErrorContext, ensureError).

Live Validation

• Recipe: skipped (standard-tier, internal-logging-only)
• Result: SKIPPED — no UI surface to validate
• Video: review.mp4 (brief app health capture)
• Native changes: none
• Metro errors: none PR-related (pre-existing Sentry type compat, appwright module, SnapUIRenderer resolution)
• Log monitoring: Metro logs checked, no PR-related errors

Correctness

• Diff vs stated goal: Aligned — all three stated changes are present and correct.
• Edge cases:
  • ensureError(result.error) where result.error is undefined: produces "Unknown error (no details provided) [TradingService.*]" — acceptable.
  • Batch failure summary with many failures: string concatenation could produce very long error messages in Sentry. Not a correctness issue but worth monitoring.
• Race conditions: None — all logging is synchronous within the existing try/catch flow.
• Backward compatibility: Preserved. No public API changes. Additional Sentry events are additive.

Static Analysis

• lint:tsc: PASS — no PR-related type errors (pre-existing errors in tests/appwright and Sentry type compat only)
• Tests: 94/94 pass (2 suites)

Architecture & Domain

• Error context format inconsistency: The new #getErrorContext calls produce {controller, method, ...} flat objects, while existing catch blocks use verbose {tags: {...}, context: {name, data: {...}}} format. This means the same method may send two different context shapes to Sentry depending on throw vs non-throwing failure. Pre-existing inconsistency, not introduced by this PR — suggestion to align in a follow-up.
• File size: TradingService.ts at 2,119 lines (above 2,000 threshold). TradingService.test.ts at 2,413 lines. Both pre-existing but trending upward. This PR adds ~70 lines net. Consider splitting TradingService into per-operation modules in a follow-up.
• JSDoc in usePerpsFlipPosition.ts line 19 still mentions "Sentry tracking" but the hook no longer does Sentry reporting. Stale comment.

Risk Assessment

• [LOW] — Additive error logging only. No behavioral changes to success paths. Test coverage is comprehensive. The only risk is increased Sentry event volume from previously-silent failures, which is the intended effect.

Recommended Action

[APPROVE]

Minor suggestions:

1. usePerpsFlipPosition.ts:19 — JSDoc still says "Sentry tracking" after removing Sentry reporting from this hook (nitpick)
2. Consider aligning error context format between throw and non-throwing failure paths in a follow-up (suggestion)
3. TradingService.ts at 2,119 lines — monitor file size growth (suggestion)

• [nitpick] app/components/UI/Perps/hooks/usePerpsFlipPosition.ts:19: JSDoc still mentions "Sentry tracking" but this hook no longer reports to Sentry (that's now the controller's responsibility). Consider updating to reflect the current behavior, e.g. "Provides consistent error handling and toast notifications".
• [suggestion] app/controllers/perps/services/TradingService.ts:1126: The new #getErrorContext calls produce a flat {controller, method, ...} object, while the existing catch block at line 1491 uses the verbose {tags: {...}, context: {name, data: {...}}} format. This means Sentry events for the same method will have different context shapes depending on throw vs non-throwing failure. Consider aligning both paths in a follow-up so Sentry dashboards can query consistently.
• [suggestion] app/controllers/perps/services/TradingService.ts:2119: TradingService.ts is at 2,119 lines (above the 2,000-line threshold). This PR adds ~70 lines of necessary logging. Consider splitting into per-operation modules (e.g. OrderService, PositionService, TPSLService) in a follow-up to keep each file manageable.