Add signer module to gui

gui/src/lib.rs

@@ -4,6 +4,7 @@ pub mod hw;
 pub mod installer;
 pub mod launcher;
 pub mod loader;
+pub mod signer;
 pub mod ui;
 pub mod utils;
 

gui/src/signer.rs

@@ -0,0 +1,55 @@
+pub use liana::signer::SignerError;
+
+use liana::{
+    miniscript::bitcoin::{
+        secp256k1,
+        util::{
+            bip32::{DerivationPath, ExtendedPubKey, Fingerprint},
+            psbt::Psbt,
+        },
+        Network,
+    },
+    signer::HotSigner,
+};
+
+pub struct Signer {
+    curve: secp256k1::Secp256k1<secp256k1::SignOnly>,
+    key: HotSigner,
+    fingerprint: Fingerprint,
+}
+
+impl Signer {
+    pub fn new(key: HotSigner) -> Self {
+        let curve = secp256k1::Secp256k1::signing_only();
+        let fingerprint = key.fingerprint(&curve);
+        Self {
+            key,
+            curve,
+            fingerprint,
+        }
+    }
+
+    pub fn generate(network: Network) -> Result<Self, SignerError> {
+        Ok(Self::new(HotSigner::generate(network)?))
+    }
+
+    pub fn fingerprint(&self) -> Fingerprint {
+        self.fingerprint
+    }
+
+    pub fn get_extended_pubkey(&self, path: &DerivationPath) -> ExtendedPubKey {
+        self.key.xpub_at(path, &self.curve)
+    }
+
+    pub fn sign_psbt(&self, psbt: Psbt) -> Result<Psbt, SignerError> {
+        self.key.sign_psbt(psbt, &self.curve)
+    }
+
+    pub fn store(
+        &self,
+        datadir_root: &std::path::Path,
+        network: Network,
+    ) -> Result<(), SignerError> {
+        self.key.store(datadir_root, network, &self.curve)
+    }
+}