Nostr SQLite database backend

SQLite storage backend for nostr apps.

Crate Feature Flags

The following crate feature flags are available:

Supported NIPs

*: ALL_RELAYS only

Example for wasm32-unknown-unknown

Add sqlite-wasm-rs and sqlite-wasm-vfs to your Cargo.toml.

use nostr_sqlite::prelude::*;
use sqlite_wasm_rs::WasmOsCallback;
use sqlite_wasm_vfs::relaxed_idb::{RelaxedIdbCfgBuilder, install as install_relaxed_idb_vfs};
use sqlite_wasm_vfs::sahpool::{OpfsSAHPoolCfgBuilder, install as install_opfs_sahpool_vfs};

const SQLITE_DB_PATH: &str = "my-db-name.sqlite3";
const SQLITE_OPFS_VFS: &str = "opfs-sahpool";
const SQLITE_IDB_VFS: &str = "relaxed-idb";

async fn register_opfs_vfs() -> Result<(), Box<dyn std::error::Error>> {
    let options = OpfsSAHPoolCfgBuilder::new()
        .vfs_name(SQLITE_OPFS_VFS)
        .directory(".mydir-opfs")
        .build();
    install_opfs_sahpool_vfs::<WasmOsCallback>(&options, false).await?;
    Ok(())
}

async fn register_idb_vfs() -> Result<(), Box<dyn std::error::Error>> {
    let options = RelaxedIdbCfgBuilder::new().vfs_name(SQLITE_IDB_VFS).build();
    install_relaxed_idb_vfs::<WasmOsCallback>(&options, false).await?;
    Ok(())
}

async fn open_wasm_db() -> NostrSqlite {
    if register_opfs_vfs().await.is_ok() {
        return NostrSqlite::open_with_vfs(SQLITE_DB_PATH, SQLITE_OPFS_VFS)
            .await
            .unwrap_or_else(|err| {
                panic!(
                    "failed to open sqlite db at `{SQLITE_DB_PATH}` with vfs `{}`: {err}",
                    SQLITE_OPFS_VFS
                )
            });
    }

    if register_idb_vfs().await.is_ok() {
        return NostrSqlite::open_with_vfs(SQLITE_DB_PATH, SQLITE_IDB_VFS)
            .await
            .unwrap_or_else(|err| {
                panic!(
                    "failed to open sqlite db at `{SQLITE_DB_PATH}` with vfs `{}`: {err}",
                    SQLITE_IDB_VFS
                )
            });
    }

    eprintln!(
        "SQLite is running in memory mode. Data is not persistent and will be lost on refresh."
    );

    NostrSqlite::in_memory()
        .await
        .unwrap_or_else(|err| panic!("failed to open in-memory sqlite in wasm: {err}"))
}

State

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

Donations

rust-nostr is free and open-source. This means we do not earn any revenue by selling it. Instead, we rely on your financial support. If you actively use any of the rust-nostr libs/software/services, then please donate.

License

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