I built a high-performance and secure JSON API for a browser-based game using microservice-inspired patterns inside a Laravel 11 monolith. The architecture is based on Events, Jobs/Queues, Notifications, and is thoroughly documented in Swagger (OpenAPI 3). The entire public API surface is covered by automated tests (feature + unit), and integration with a crypto payment system has been implemented (webhooks, signature validation, idempotency).
Objectives and Goals
- Design an API that withstands real-time peak loads (game events, leaderboards, inventory).
- Guarantee reliability through queues, retries, transactions, and idempotent endpoints.
- Ensure transparent crypto-payment integration: invoices, webhook notifications, signature verification, statuses.
- Cover the API with tests for stable releases and safe changes.
- Provide up-to-date documentation for the frontend and external integrators (Swagger UI + JSON/YAML).
Architecture and Key Components
Events and Queues
- Domain Events (e.g., PlayerLeveledUp, ItemCrafted, BattleFinished) are emitted without blocking the main flow.
- Queued Jobs handle heavy operations: rewards crediting, leaderboard recalculations, sending notifications, and statistics synchronization.
- Retry/Backoff and failover logic for unstable integrations (network failures, rate limits).
Notifications
- Channels: email, in-game (via events/websockets or queues), and, if needed, Telegram/Discord webhooks.
- Single source of truth: a Notification class + channel-specific transformers.
API Design
- RESTful endpoints with clear resources: /players, /inventory, /battles, /leaderboard, /store, /payments.
- A consistent error format (standardized codes + machine-readable payload).
- Pagination, sorting, filtering; ETag/Last-Modified (where appropriate) to save bandwidth.
- Rate limiting bound to user/token, protection against brute-force and spam.
Crypto Payments: Integration and Security
- Invoice creation with fixed rate/amount and invoice lifetime timers.
- Webhooks from the payment system: signature verification (HMAC/RSA), time window checks, redelivery handling.
- Idempotency: each incoming request is processed exactly once (idempotency keys + transactions table).
- Payment state: pending → confirmed → credited with atomic crediting in in-game currency/items.
- Anti-fraud checks: amount/attempt limits, address/parameter tamper control, audit log.
Swagger Documentation (OpenAPI 3)
- Full schema: endpoints, parameters, request/response bodies, examples, and error codes.
- JWT/Bearer auth described in securitySchemes; authorization scenarios in security.
- Automatic publication of Swagger UI for developers + versioning (
/api/v1,/api/v2as needed). - Export of openapi.json/yaml for third-party integrators and contract testing.
Testing and Quality
- Unit tests for domain logic (reward calculations, crafting, battle mechanics).
- Feature tests for endpoints (happy/unhappy paths, authorization, validation, access rights).
- HTTP contracts: tests against the OpenAPI spec to prevent breaking clients.
- Test doubles for the payment provider (fake webhooks, sandbox), idempotency cases.
- Critical paths coverage ~100%; average module coverage agreed within CI.
Performance and Scaling
- Cache-first for “hot” data (leaderboards, item metadata), Eloquent/SQL tuning, indexes.
- Connection pools for DB/queues, dedicated workers for “heavy” queues.
- Horizontal scaling of workers and web; readiness for autoscaling.
- Observability: structured logs, metrics, alerts; event/request correlation.
Security
- JWT with limited TTL and refresh flow; session binding to device/geo (if needed).
- Policy/Guard for resource access (strict RBAC).
- Input validation (FormRequests), normalization, sanitization.
- CORS, rate limit, CSRF (where applicable), replay-attack protection.
- Regular dependency updates, read-only roles for DB, secrets via ENV/secret manager.
Product Outcomes
- Low API latency and resilience under load (peak events).
- Predictable monetization: crypto payments operate reliably with transparent statuses and audit.
- Faster client development thanks to Swagger and stable contracts.
- Fewer incidents due to test coverage and idempotency on critical operations.
What I can add on request
- WebSockets (Laravel Reverb/Pusher) for real-time: matches, chats, inventory updates.
- Anti-cheat modules and additional action-verification mechanisms.
- Game economy: dynamic balances, daily quests, seasonal events, battle passes.
- Item/case storefronts, promo codes, partner integrations.
The browser game API on Laravel 11 is designed as a reliable, scalable, and secure foundation with clear contracts (Swagger), thoughtful load handling (Events/Jobs/Queues), and ready-made crypto-payment integration. It’s a base that’s easy to evolve — from new gameplay mechanics to live events and global seasons.
Do you need a similar API?
I will prepare the architecture, release roadmap, and budget based on your load metrics and business goals.
