Implement Client Layer for External Services

[eenthiran]

Task: Implement Client Layer for External Services

Description

Design and implement a client layer that provides abstracted interfaces for interacting with external services, databases, caches, and blockchain networks.

Objectives

• Create a client module in src/client/
• Implement database client interfaces and implementations
• Create caching client interfaces and implementations
• Implement network client for L2 blockchain interactions
• Add client-side validation and error handling
• Implement connection pooling and retry mechanisms
• Add monitoring and metrics for client operations

Implementation Details

• Define client interfaces for different external services
• Implement concrete clients for specific technologies
  • Database clients (PostgreSQL, MongoDB, etc.)
  • Cache clients (Redis, Memcached, etc.)
  • Network clients for L2 blockchain interactions
• Add connection pooling for efficient resource usage
• Implement circuit breakers for fault tolerance
• Add retry mechanisms with exponential backoff
• Implement client-side metrics collection

Acceptance Criteria

• Clients provide clean abstractions over external services
• Client operations handle errors gracefully
• Connection pooling works efficiently
• Circuit breakers prevent cascading failures
• Retry mechanisms handle transient failures
• Metrics provide insights into client performance
• Clients are properly tested with mocks/stubs

Dependencies

• Error handling system
• Configuration management

Estimated Effort

Large (7-10 days)

Priority

High