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async-hwi

Current Minimum Supported Rust Version: v1.70.0

/// HWI is the common Hardware Wallet Interface.
#[async_trait]
pub trait HWI: Debug {
    /// 0. Return the device kind
    fn device_kind(&self) -> DeviceKind;
    /// 1. Application version or OS version.
    async fn get_version(&self) -> Result<Version, Error>;
    /// 2. Get master fingerprint.
    async fn get_master_fingerprint(&self) -> Result<Fingerprint, Error>;
    /// 3. Get the xpub with the given derivation path.
    async fn get_extended_pubkey(&self, path: &DerivationPath) -> Result<Xpub, Error>;
    /// 4. Register a new wallet policy
    async fn register_wallet(&self, name: &str, policy: &str) -> Result<Option<[u8; 32]>, Error>;
    /// 5. Returns true if the wallet is registered
    async fn is_wallet_registered(&self, name: &str, policy: &str) -> Result<bool, HWIError>;
    /// 6. Display an address on the device screen
    async fn display_address(&self, script: &AddressScript) -> Result<(), Error>;
    /// 7. Sign a partially signed bitcoin transaction (PSBT).
    async fn sign_tx(&self, tx: &mut Psbt) -> Result<(), Error>;
}

#[derive(Debug, Clone, PartialEq, Eq)]
pub enum AddressScript {
    /// Must be a bip86 path.
    P2TR(DerivationPath),
    /// Miniscript requires the policy be loaded into the device.
    Miniscript { index: u32, change: bool },
}

Supported devices

A Empty case means the method is unimplemented on the client or device side.

device 1 2 3 4 5 6 7
BitBox021 >= v9.15.0 >= v9.15.0 >= v9.15.0 >= v9.15.0 >= v9.15.0 >= v9.15.0 >= v9.15.0
Coldcard2 >= v6.2.1X >= v6.2.1X >= v6.2.1X >= v6.2.1X >= v6.2.1X >= v6.2.1X >= v6.2.1X
Jade3 >= v1.0.30 >= v1.0.30 >= v1.0.30 >= v1.0.30 >= v1.0.30 >= v1.0.30 >= v1.0.30
Ledger Nano S/S+4 >= v2.1.2 >= v2.1.2 >= v2.1.2 >= v2.1.2 *check hmac presence >= v2.1.2 >= v2.1.2
Specter5 >= v1.8.0 >= v1.8.0 >= v1.8.0 >= v1.8.0

Footnotes

  1. https://github.com/digitalbitbox/bitbox02-firmware

  2. https://github.com/alfred-hodler/rust-coldcard

  3. https://github.com/Blockstream/Jade

  4. https://github.com/LedgerHQ/app-bitcoin-new

  5. https://github.com/cryptoadvance/specter-diy