API Gateway

Overview

The API Gateway service will provide a unified entry point for all external API requests to the stock-bot platform. It will handle request routing, composition, protocol translation, authentication, and other cross-cutting concerns, providing a simplified interface for clients while abstracting the internal microservice architecture.

Planned Features

Request Management

Routing: Direct requests to appropriate backend services
Aggregation: Combine results from multiple microservices
Transformation: Convert between different data formats and protocols
Parameter Validation: Validate request parameters before forwarding
Service Discovery: Dynamically locate service instances

Security Features

Authentication: Centralized authentication for all API requests
Authorization: Role-based access control for API endpoints
API Keys: Management of client API keys and quotas
JWT Validation: Token-based authentication handling
OAuth Integration: Support for OAuth 2.0 flows

Traffic Management

Rate Limiting: Protect services from excessive requests
Throttling: Client-specific request throttling
Circuit Breaking: Prevent cascading failures
Load Balancing: Distribute requests among service instances
Retries: Automatic retry of failed requests

Operational Features

Request Logging: Comprehensive logging of API activity
Metrics Collection: Performance and usage metrics
Caching: Response caching for improved performance
Documentation: Auto-generated API documentation
Versioning: Support for multiple API versions

Planned Integration Points

Frontend Connections

Trading Dashboard (web client)
Mobile applications
Third-party integrations
Partner systems

Backend Services

All platform microservices
Authentication services
Monitoring and logging systems

Planned Technical Implementation

Technology Stack

API Gateway: Kong, AWS API Gateway, or custom solution
Runtime: Node.js with TypeScript
Documentation: OpenAPI/Swagger
Cache: Redis for response caching
Storage: Database for API configurations

Architecture Pattern

Backend for Frontend (BFF) pattern
API Gateway pattern
Circuit breaker pattern
Bulkhead pattern for isolation

Development Guidelines

API Design

RESTful API design standards
Error response format
Versioning strategy
Resource naming conventions

Security Implementation

Authentication requirements
Authorization approach
API key management
Rate limit configuration

Performance Optimization

Caching strategies
Request batching techniques
Response compression
Timeout configurations

Implementation Roadmap

Core routing and basic security features
Traffic management and monitoring
Request aggregation and transformation
Advanced security features
Developer portal and documentation

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