Chorus is a nostr relay.

It is pretty fast: docs/PERFORMANCE.md.

It can work as your personal relay: docs/PERSONAL_RELAY.md.

To deploy chorus, read docs/DEPLOYING.md

To configure chorus read docs/CONFIG.md

To undertand the relay's behavior, read docs/BEHAVIOR.md

To understand command line tools, read docs/TOOLS.md

Chorus does not have any provisions for charging users.

Chorus does not have any provisions for synchronizing events with other relays outside of the nostr protocol.

strfry is a more mature relay that offers additional features including:

• Synchronizing events with other relays efficiently (negentropy)
• Zero-downtime restarts
• Websocket permessage-deflate
• Plugins for event sifting

However:

• Chorus is probably faster (more efficient)
• Chorus has personal relay rules by default
• Chorus has extensive IP banning to protect your relay from abuse
• Chorus supports NIP-42 (AUTH), NIP-59 (GiftWrap), NIP-65 (Relay Lists) and PR 1030.
• Chorus has a moderation tool

nostream

nostr-rs-relay

khatru

• chorus_moderate tool to approve events or pubkeys
• chorus_dump_approvals tool to view prior approvals
• chorus_compress to backup and rebuild your data, compressing as it goes.
• NIP-40 event expiration support
• extended NIP-11 document, with updates to supported NIPs
• Traffic bytes counted and logged on exit (or HUP)
• Logging improvements
• Data migrations. Less space consumed.
• performance improved via 8-byte alignment of events

• Config option to run as an open relay
• Config variable for scraper behavior
• More efficient scraping
• Reload config on HUP without dropping connections
• IP addresses no longer logged. They are hashed and tracked by their hash.

• FIX some LIMIT related bugs
• FIX some indexing bugs that cuased some events that should have been returned to not be.
• Allow scrape up to limit=100, or time range of 1 hour

• Update docs

• BREAKING: Config changed to TOML format
• Logging improvements
• Error handling improvements
• Ban time improvements
• Documentation updates
• Restructured into a bin and a lib
• Tool to dump all events as JSON to stdout

• FIX: REQ errors now properly CLOSED
• Logging improvements
• Persistent IP reputation data for adjusting ban times
• Config settings for serve_ephmeral and serve_relay_lists
• Uses 'X-Real-Ip' header if behind a proxy

• FIX: significant performance problem addressed
• Logging improvements
• EVENTs submitted that are known to be deleted are now responded to with 'blocked:'
• Longer filters now accepted

• FIX: after EOSE, outbound events were not being screened properly
• FIX: shutdown issue
• NIP-11 updated
• Idle connections with no REQs now timed out at 5 seconds

• FIX: limits were not working properly
• Update IP banning logic and timing
• Improve logging
• Allow more REQ filters (with low limits)
• Better performance when filters are more open

• FIX: deadlock (nested transaction issue)
• Logging changes
• Documentation updated

• FIX: AUTH was failing due to a bad time difference comparison
• AUTH failures now include detail as to why
• documentation updated

• Initial release.
• Works as a personal relay
• Supported NIPs: 1, 4, 9, 11, 42, 59, 65
• Bans IPs to prevent abuse
• Limits to 32 subscriptions by default, configurable