API Gateway with Dynamic Policy Enforcement (Issue #984)

[Ayaanshaikh12243]

API Gateway with Dynamic Policy Enforcement (Issue #984)

Summary

This feature implements a modular API Gateway for centralized authentication, rate limiting, and real-time policy enforcement across microservices. It supports dynamic policy updates, RBAC/ABAC, audit logging, and admin APIs for secure, scalable service management.

Features

• Centralized authentication (JWT)
• Rate limiting and quota management
• Dynamic policy engine (RBAC/ABAC, real-time updates)
• Request routing and microservice proxying
• Admin API for policy management
• Logging, monitoring, and audit trail
• Utility functions for validation, encoding, and error handling
• Policy storage and advanced enforcement
• Basic tests for gateway modules
• Scalable backend codebase (500+ lines)

Benefits

• Consistent, centralized security and policy enforcement
• Real-time updates for policies and access control
• Reliable audit trail and compliance support
• Simplifies microservice management and monitoring

Files Added/Modified

• gateway/server.js
• gateway/auth.js
• gateway/rateLimiter.js
• gateway/policyEngine.js
• gateway/routes.js
• gateway/adminApi.js
• gateway/logging.js
• gateway/monitoring.js
• gateway/utils.js
• gateway/config.js
• gateway/policyStore.js
• gateway/advancedPolicyEngine.js
• gateway/auditTrail.js
• gateway/gateway.test.js

How to Use

1. Start the API Gateway: node gateway/server.js
2. Use admin API to manage policies
3. Route requests through the gateway for authentication, rate limiting, and policy enforcement

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Closes #984

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🎉 Thanks for the PR, @Ayaanshaikh12243!

We really appreciate you taking the time to contribute to ExpenseFlow! 💙

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✅ PR Checklist

Before we review, please ensure:

• Your code follows the project's coding standards
• All file changes are accurate and intentional
• You've tested your changes locally
• Any review comments have been addressed

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🙌 Thank You for Contributing!

We truly appreciate your interest in contributing to this project.

• Please make sure your code follows the project structure
• Add clear commit messages and comments where necessary
• Ensure your changes do not break existing functionality

We'll review your PR as soon as possible. Keep up the great work! ✨

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Project	Deployment	Actions	Updated (UTC)
expenseflow	Error		Mar 5, 2026 6:44am