Adoption

Here are several implementations that showcase the Cashu Development Kit's capabilities in real-world applications:

Mint Implementation (opens new window)

A reference implementation of a Cashu mint server built with the CDK. Demonstrates how to create a fully functioning Cashu mint supporting token issuance, redemption, and state management.

Wallet Implementation (opens new window)

A reference implementation of a Cashu wallet built with the CDK. Demonstrates client-side operations including token management, mint queries, and wallet functionality.

Athenut (opens new window)

An open-source Cashu mint implementation built on the CDK with additional features for production use. Shows how to extend the core CDK functionality with custom requirements.

Cashu Payment Backend (opens new window)

A backend service that provides a simple HTTP API for merchants to generate and process Cashu token payments. It implements NUT-18 payment protocol and supports multiple mints and currencies (SAT and USD), making it flexible for various use cases.

Cashu-LSP (opens new window)

A modular Lightning Service Provider (LSP) implementation that uses CDK to create NUT-18 payment requests for accepting Lightning Network channel payments, integrated with Lightning Development Kit (LDK) for node functionality.

Cashu Proxy (opens new window)

A HTTP proxy service that requires Cashu tokens for access, enabling pay-per-request APIs and services. Cashu Proxy sits between clients and your HTTP services, requiring payment in the form of Cashu tokens in the X-Cashu header of the request before forwarding requests. This enables monetization of APIs and web services on a per-request basis with minimal integration effort.

CDK Payment Processor (opens new window)

A payment processing library built on top of the CDK that implements the NUT-18 payment protocol. It provides a standardized way to handle Cashu token payments, making it easier to integrate Cashu payments into applications and services.