nostr-sdk

Nostr SDK

Description

A high-level, Nostr client library written in Rust.

If you're writing a typical Nostr client or bot, this is likely the crate you need.

However, the crate is designed in a modular way and depends on several other lower-level crates. If you're attempting something more custom, you might be interested in these:

• nostr: Rust implementation of Nostr protocol
• nostr-sdk-net: Nostr SDK Network library
• nostr-sdk-sqlite: Nostr SDK SQLite library

Getting started

[dependencies]
nostr-sdk = "0.21"
tokio = { version = "1", features = ["full"] }

use std::net::{Ipv4Addr, SocketAddr, SocketAddrV4};

use nostr_sdk::prelude::*;

#[tokio::main]
async fn main() -> Result<()> {
    // Generate new keys
    let my_keys: Keys = Keys::generate();
    //
    // or use your already existing
    //
    // From HEX or Bech32
    // let my_keys = Keys::from_sk_str("hex-or-bech32-secret-key")?;

    // Show bech32 public key
    let bech32_pubkey: String = my_keys.public_key().to_bech32()?;
    println!("Bech32 PubKey: {}", bech32_pubkey);

    // Create new client
    let client = Client::new(&my_keys);

    let proxy = Some(SocketAddr::V4(SocketAddrV4::new(Ipv4Addr::LOCALHOST, 9050)));

    // Add relays
    client.add_relay("wss://relay.damus.io", None).await?;
    client.add_relay("wss://relay.nostr.info", proxy).await?;
    client.add_relay(
        "ws://jgqaglhautb4k6e6i2g34jakxiemqp6z4wynlirltuukgkft2xuglmqd.onion",
        proxy,
    ).await?;

    // Connect to relays
    client.connect().await;

    let metadata = Metadata::new()
        .name("username")
        .display_name("My Username")
        .about("Description")
        .picture(Url::parse("https://example.com/avatar.png")?)
        .banner(Url::parse("https://example.com/banner.png")?)
        .nip05("[email protected]")
        .lud16("[email protected]");

    // Update metadata
    client.set_metadata(metadata).await?;

    // Publish a text note
    client.publish_text_note("My first text note from Nostr SDK!", &[]).await?;

    // Send custom event
    let event_id = EventId::from_bech32("note1z3lwphdc7gdf6n0y4vaaa0x7ck778kg638lk0nqv2yd343qda78sf69t6r")?;
    let public_key = XOnlyPublicKey::from_bech32("npub14rnkcwkw0q5lnmjye7ffxvy7yxscyjl3u4mrr5qxsks76zctmz3qvuftjz")?;
    let event: Event = EventBuilder::new_reaction(event_id, public_key, "🧡").to_event(&my_keys)?;

    // Send custom event to all relays
    // client.send_event(event).await?;

    // Send custom event to a specific previously added relay
    client.send_event_to("wss://relay.damus.io", event).await?;

    Ok(())
}

More examples can be found in the examples/ directory.

WASM

This crate supports the wasm32 targets.

An example can be found at nostr-sdk-wasm-example repo.

On macOS you need to install llvm:

brew install llvm
LLVM_PATH=$(brew --prefix llvm)
AR="${LLVM_PATH}/bin/llvm-ar" CC="${LLVM_PATH}/bin/clang" cargo build --target wasm32-unknown-unknown

NOTE: Currently nip03 feature not support WASM.

Crate Feature Flags

The following crate feature flags are available:

Feature	Default	Description
sqlite	No	Persistent storage of data on SQLite database
blocking	No	Needed to use this library in not async/await context
vanity	No	Enable vanity public key mining module
all-nips	Yes	Enable all NIPs
nip03	No	Enable NIP-03: OpenTimestamps Attestations for Events
nip04	Yes	Enable NIP-04: Encrypted Direct Message
nip05	Yes	Enable NIP-05: Mapping Nostr keys to DNS-based internet identifiers
nip06	Yes	Enable NIP-06: Basic key derivation from mnemonic seed phrase
nip11	Yes	Enable NIP-11: Relay Information Document
nip19	Yes	Enable NIP-19: bech32-encoded entities
nip46	Yes	Enable NIP-46: Nostr Connect

Supported NIPs

Look at https://github.com/rust-nostr/nostr/tree/master/crates/nostr#supported-nips

State

This library is in an ALPHA state, things that are implemented generally work but the API will change in breaking ways.

License

This project is distributed under the MIT software license - see the LICENSE file for details

Donations

⚡ Tips: https://getalby.com/p/yuki

⚡ Lightning Address: [email protected]