Communication II: Building and Integrating Custom RPC Handlers

Module Overview

Custom RPC handlers are the gateway to extending Rippled's capabilities: they allow developers to add new queries, operations, and integrations tailored to specific use cases.

In this module you apply everything learned in last course (handler architecture, request flow, authentication, error handling) to design, implement, and test your own RPC handlers. By the end you will have built a complete custom handler from scratch, including registration, validation, ledger access, and comprehensive testing.

Explore the Topics

This deep dive is organized into focused topics, each exploring a critical aspect of RPC handler implementation. Click on any topic below to dive deeper into the concepts, codebase structure, and practical implementations.

What You Will Learn

By completing this module, you will be able to:

Implement custom RPC handlers following XRPL conventions with proper request parsing and response formatting
Apply security patterns including role-based access control and resource management
Build comprehensive error handling with proper HTTP status codes and JSON-RPC error responses
Test your implementation with unit tests and integration tests
Access ledger data, account information, and transaction history through context APIs
Follow best practices and established patterns for maintainability and code quality

These skills are essential for extending Rippled functionality, building developer tools, and contributing to the XRPL ecosystem.

🛠️ Implementing Custom Handlers

Writing Complete Handler Functions

Learn how to implement RPC handlers from scratch, including function signatures, input validation, ledger queries, result construction, and proper code organization.

Key Topics: Handler signatures, input validation, ledger access, result construction, code organization

Codebase: src/xrpld/rpc/handlers/

Explore Implementing Custom Handlers →