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intorduced in app purchase — LLD

LLD

Module Breakdown

  • Module A/B with public interfaces and internals

Data Structures & Storage

  • Entities/DTOs, schemas, migrations

Algorithms & State

  • Pseudocode / state machines

Configuration

feature_enabled: true
timeout_ms: 5000
retry: { attempts: 3 }

Error Handling

  • Taxonomy, retries, idempotency, backoff

Logging & Instrumentation

  • Logs, metrics (names/types/labels), tracing spans

Security Details

  • Permissions, secrets, validation

I18n/Accessibility (if applicable)

Edge Cases