Ruby Nostr Relay

A lightweight, high-performance Nostr relay implementation for Ruby 3.0+.

NIP Support

This relay supports the following Nostr Implementation Possibilities (NIPs):

• NIP-01: Basic protocol flow
• NIP-02: Contact List and Petnames
• NIP-04: Encrypted Direct Messages (relay side)
• NIP-09: Event deletion (kind 5)
• NIP-11: Relay Information Document
• NIP-12: Generic tag queries (#e, #p, etc)
• NIP-15: Marketplace
• NIP-16: Event Treatment (ephemeral events 20000-29999)
• NIP-20: Command results (OK messages)
• NIP-22: Event created_at limits (timestamp validation)
• NIP-28: Public Chat
• NIP-33: Parameterized Replaceable Events (kind 30000-39999)
• NIP-40: Expiration Timestamp
• NIP-62: Request to vanish (complete data removal)
• NIP-70: Protected Events (rejects events with "-" tag)

Usage

bundle exec ruby main.rb

The relay will start on ws://localhost:8080 by default.

Installation

git clone <repository-url>
cd ruby-nostr-relay

bundle install

Requirements

• Ruby 3.0 or higher
• PostgreSQL
• Bundler

License

MIT License

Author

Yasuhiro Matsumoto (a.k.a. mattn)