# Sparrow

[sparrow-joinstr](https://github.com/QcMrHyde/sparrow-joinstr) is a fork of [Sparrow Wallet](https://sparrowwallet.com) with a joinstr coinjoin window. It works with any wallet and server that Sparrow supports.

| | |
|---|---|
| Latest version | 0.2.0, based on Sparrow 2.3.2 |
| Platforms | Linux (`.deb`, `.tar.gz`), Windows (`.msi`, `.zip`) |
| Transport | Tor only |
| aut-ct | Yes |
| Source | [github.com/QcMrHyde/sparrow-joinstr](https://github.com/QcMrHyde/sparrow-joinstr) |

## Download and verify

Download the package for your system together with `manifest.txt` and `manifest.txt.floppy.asc` from the [v0.2.0 release](https://github.com/QcMrHyde/sparrow-joinstr/releases/tag/v0.2.0). The manifest is signed with the same key as the other joinstr releases.

```sh
gpg --keyserver hkps://keys.openpgp.org --recv-keys 9253062A4F92D63459085CA62D230520212A5901
gpg --verify manifest.txt.floppy.asc manifest.txt
sha256sum --check --ignore-missing manifest.txt
```

## Use

1. Open or create a wallet in Sparrow and connect to a server as usual.
2. Open **Tools > Coinjoin**.
3. Under **Settings**, set the nostr relay (default `wss://nos.lol`) and, for aut-ct pools, the aut-ct API URL.
4. Use **New pool** to create a pool, or **Other pools** to join one. **My Pools** and **History** show your pools and finished coinjoins.

**New pool** asks for the denomination, number of peers, fee rate (defaults to the wallet's estimate) and timeout in minutes. For an aut-ct pool, also fill in **aut-ct Keyset** and optionally a **Proving Key**. Without a proving key, Sparrow uses a taproot coin from the wallet.

## Behaviour

- Every joinstr request goes through Tor on a new circuit. If Tor is not running, the request is refused instead of being sent from your real IP address. A relay on `localhost` is reached directly.
- Pools that advertise the VPN transport are refused. Tor is the only transport this client supports.
- The client supports aut-ct sybil resistance. It also supports ring signature recovery when some peers do not sign.