KVAC Mint and Wallet

crates/cashu/Cargo.toml

@@ -10,11 +10,12 @@ rust-version = "1.63.0"
 license = "MIT"
 
 [features]
-default = ["mint", "wallet"]
+default = ["mint", "wallet", "kvac"]
 swagger = ["dep:utoipa"]
 mint = ["dep:uuid"]
 wallet = []
 bench = []
+kvac = ["dep:cashu_kvac"]
 
 [dependencies]
 uuid = { version = "=1.12.1", features = ["v4", "serde"], optional = true }
@@ -35,6 +36,7 @@ url = "2.3"
 utoipa = { version = "4", optional = true }
 serde_json = "1"
 serde_with = "3"
+cashu_kvac = { git = "https://github.com/lollerfirst/cashu-kvac.git", rev = "03bcca4997f310b4e2e1b8a3b22cf444faa41e6a", optional = true }
 
 [target.'cfg(target_arch = "wasm32")'.dependencies]
 instant = { version = "0.1", features = ["wasm-bindgen", "inaccurate"] }

crates/cashu/src/amount.rs

@@ -32,7 +32,7 @@ pub enum Error {
 #[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, PartialOrd, Ord, Serialize, Deserialize)]
 #[cfg_attr(feature = "swagger", derive(utoipa::ToSchema))]
 #[serde(transparent)]
-pub struct Amount(u64);
+pub struct Amount(pub u64);
 
 impl FromStr for Amount {
     type Err = Error;
@@ -180,6 +180,18 @@ impl From<Amount> for u64 {
     }
 }
 
+impl TryFrom<Amount> for i64 {
+    type Error = Error;
+
+    fn try_from(value: Amount) -> Result<Self, Error> {
+        if value.0 < (i64::MAX as u64) {
+            Ok(value.0 as i64)
+        } else {
+            Err(Error::AmountOverflow)
+        }
+    }
+}
+
 impl AsRef<u64> for Amount {
     fn as_ref(&self) -> &u64 {
         &self.0