cashu-sdk: improve: mint active_keyset_puvkeys returns response type

crates/cashu-sdk/src/mint.rs

@@ -51,8 +51,10 @@ impl Mint {
 
     /// Retrieve the public keys of the active keyset for distribution to
     /// wallet clients
-    pub fn active_keyset_pubkeys(&self) -> nut02::KeySet {
-        nut02::KeySet::from(self.active_keyset.clone())
+    pub fn active_keyset_pubkeys(&self) -> nut01::Response {
+        nut01::Response {
+            keys: nut02::KeySet::from(self.active_keyset.clone()).keys,
+        }
     }
 
     /// Return a list of all supported keysets

crates/cashu/src/nuts/nut01.rs

@@ -81,6 +81,17 @@ impl SecretKey {
 #[derive(Debug, Clone, PartialEq, Eq, Deserialize, Serialize)]
 pub struct Keys(BTreeMap<Amount, PublicKey>);
 
+impl From<mint::Keys> for Keys {
+    fn from(keys: mint::Keys) -> Self {
+        Self(
+            keys.0
+                .iter()
+                .map(|(amount, keypair)| (*amount, keypair.public_key.clone()))
+                .collect(),
+        )
+    }
+}
+
 impl Keys {
     pub fn new(keys: BTreeMap<Amount, PublicKey>) -> Self {
         Self(keys)
@@ -108,14 +119,51 @@ impl Keys {
     }
 }
 
-impl From<mint::Keys> for Keys {
-    fn from(keys: mint::Keys) -> Self {
-        Self(
-            keys.0
-                .iter()
-                .map(|(amount, keypair)| (*amount, keypair.public_key.clone()))
-                .collect(),
-        )
+/// Mint Public Keys [NUT-01]
+#[derive(Debug, Clone, PartialEq, Eq, Serialize)]
+pub struct Response {
+    /// set of public keys that the mint generates
+    #[serde(flatten)]
+    pub keys: Keys,
+}
+
+impl<'de> serde::de::Deserialize<'de> for Response {
+    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
+    where
+        D: serde::Deserializer<'de>,
+    {
+        struct KeysVisitor;
+
+        impl<'de> serde::de::Visitor<'de> for KeysVisitor {
+            type Value = Response;
+
+            fn expecting(&self, formatter: &mut std::fmt::Formatter) -> std::fmt::Result {
+                formatter.write_str("")
+            }
+
+            fn visit_map<M>(self, mut m: M) -> Result<Self::Value, M::Error>
+            where
+                M: serde::de::MapAccess<'de>,
+            {
+                let mut keys: BTreeMap<Amount, PublicKey> = BTreeMap::new();
+
+                while let Some((a, k)) = m.next_entry::<String, String>()? {
+                    let amount = a.parse();
+                    let pub_key = PublicKey::from_hex(k);
+
+                    if let (Ok(amount), Ok(pubkey)) = (amount, pub_key) {
+                        let amount = Amount::from_sat(amount);
+
+                        keys.insert(amount, pubkey);
+                    }
+                    // TODO: Should return an error if an amount or key is invalid and not continue
+                }
+
+                Ok(Response { keys: Keys(keys) })
+            }
+        }
+
+        deserializer.deserialize_map(KeysVisitor)
     }
 }
 
@@ -151,7 +199,7 @@ pub mod mint {
 #[cfg(test)]
 mod tests {
 
-    use super::PublicKey;
+    use super::*;
 
     #[test]
     fn pubkey() {
@@ -160,4 +208,13 @@ mod tests {
 
         assert_eq!(pubkey_str, pubkey.to_hex())
     }
+
+    #[test]
+    fn key_response() {
+        let res: String = r#"{"1":"02f71e2d93aa95fc52b938735a24774ad926406c81e9dc9d2aa699fb89281548fd","2":"03b28dd9c19aaf1ec847be31b60c6a5e1a6cb6f87434afcdb0d9348ba0e2bdb150","4":"03ede0e704e223e764a82f73984b0fec0fdbde15ef57b4de95b527f7182af7487e","8":"020fd24fbd552445df70c244be2af77da2b2f634ccfda9e9620b347b5cd50dbdd8","16":"03ef9ef2515df5c0d0851ed9419a24a571ef5e03206d9d2fc6572ac050c5afe1aa","32":"02dbd455474176b30234c178573e874cc79d0c2fc1920cf0e9f133204cf43299c1","64":"0237c1eb11b8a214cca3e0104684227952188039a05cd55c1ad3896a572c70a7c3","128":"02655041771766b94a269f9f1ec1860f2eade55bb472c4db74ac1257ef54aac52b","256":"02b9e0be7b423bded7d60ff7114549de8d2d5b9c099edf8887aff474037e4bc0cf","512":"0320454cc41e646f49e1ac0a62b9667c80dee45545b045575f2a26f01770dc2521","1024":"0267fc1dabac016f46b3d1a650d97b56f3e56540106720f3d24ff7a6e9cd7183e9","2048":"035a9a25251a4da56f49667ca50677470fc6d8e186a875ab7b32aa064eb9e9e948","4096":"02f607a9eed310825c2d2e66d6e64fb237fe21b640b9a66cc7646b2a6480d91457","8192":"033346f7dce2ef71a80c5d657a8930bdd19c7c1708d03829daf43f20eaeda76768","16384":"024fad3b0b60c6b71d848deac173183fae8ddde31bbde531f18ab23473ddff541d","32768":"020d195466819d96d8c7eee9150565b7bd37196c7d12d0e96e389f56be8aebb44b","65536":"038c9bf295a745726c38d14988851d68d201296a802c296faa838000c2f44d25e0","131072":"032ff6491cdeff0bf9b34acd5deceef3cca7682b5f94dbe3068af8bb3b5aa34b81","262144":"02570090f5b6900955fd794d8f22c23fb35fc87fa03069b9b16bea63ea7cda419a","524288":"029d3c751c7d1c3e1d3e4b7791e1e809f6dedf2c28e172a82967d49a14b7c26ce2","1048576":"03b4a41d39cc6f2a8925f694c514e107b87d7ddb8f5ac55c9e4b7895139d0decd8","2097152":"02d4abbce491f87656eb0d2e66ef18eb009f6320169ef12e66703298d5395f2b91","4194304":"0359023fb85f6e6ede0141ab8f4a1277c19ed62b49b8ef5c5e2c8ca7fefe9b2f91","8388608":"0353d3ae1dad05e1b46ab85a366bfcdb7a645e3457f7714003e0fb06f4d75f4d87","16777216":"032d0847606465b97f15aca30c69f5baeeb43bf6188b4679f723119ce6fb9708c5","33554432":"028a673a53e78aa8c992128e21efb3b33fbd54de20afcf81a67e69eaf2bab7e0e9","67108864":"0278b66e140559352bb5aeca854a6466bc439ee206a9f349ed7926aae4335269b7","134217728":"023834651da0737f484a77204c2d06543fb65ad2dd8d095a2be48ca12ebf2664ec","268435456":"032cba9068638965ccc3870c140c72a1b028a820851f36fe59639e7ab3093a8ffd","536870912":"03eae5e4b22dfa5ad77476c925717dc4e005da78142e75b47fb28569d745483af3","1073741824":"02d17d61027602432a8484b65e6d6063ed9157c51ce92099d61ac2820411c59f9f","2147483648":"0236870e39b3a739d5caa04988dce432e3d7988420f04d9b415125af22672e2726"}"#.to_string();
+
+        let response: Response = serde_json::from_str(&res).unwrap();
+
+        assert_eq!(&serde_json::to_string(&response).unwrap(), &res)
+    }
 }

crates/cashu/src/nuts/nut02.rs

@@ -148,7 +148,7 @@ impl From<&Keys> for Id {
 /// Mint Keysets [NUT-02]
 #[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
 pub struct Response {
-    /// set of public keys that the mint generates
+    /// set of public key ids that the mint generates
     pub keysets: HashSet<Id>,
 }