Add timeout and circuit breaker for external blockchain rpc calls#532
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- Replace #[contracttype] with #[contracttype(export = false)] on StorageKey enum to bypass XDR LengthExceedsMax limit. - Remove 10 unused API/rate-limit StorageKey variants. - Add missing CreditMemo, CustomerTaxStatus, DigitalGoodsClass, TaxRateEntry, TaxRateChangeLogByJdx, TaxRemittanceLine, TaxRemittanceReport, ReviewCase, SubscriberSubscriptions, and MerchantSubscriptions variants needed by invoice/fraud crates. - Move MEV protection types (ChargeCommitment, MevChargeConfig, GasPriceSnapshot, MevEventKind) from types crate into subscription crate to avoid XDR metadata bloat.
Line 56 had an extra after the statusStyles object, causing TS1128: Declaration or statement expected.
nightly-2023-12-01 is too old to parse the lockfile format in cargo-fuzz v0.13.1 (lock file version 4). Bump to nightly-2024-09-01.
…regenerate typechain factories
- Configurable timeout per RPC endpoint (per-provider timeoutMs + defaultTimeoutMs) - Circuit breaker with failure threshold, open/half-open/closed state machine - Recovery timeout transitions open → half-open → closed on probe success - RPC provider fallback: priority-ordered list, skips open circuits - Circuit state monitoring dashboard (getDashboard, getCircuitStatuses) - Graceful degradation: RpcAllProvidersFailedError when all circuits open - Manual circuit reset (resetCircuit, resetAllCircuits) with audit event - Audit log with capped ring-buffer for state transitions, failures, timeouts - 36 tests covering all acceptance criteria
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--- closes #429
This PR will not be mergeable until all quality gates pass.