/// 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 }, }