fix: use correct error

crates/cdk-integration-tests/tests/fake_wallet.rs

@@ -866,9 +866,9 @@ async fn test_fake_mint_input_output_mismatch() -> Result<()> {
 
     match response {
         Err(err) => match err {
-            cdk::Error::UnsupportedUnit => (),
-            _ => {
-                bail!("Wrong error returned");
+            cdk::Error::UnitMismatch => (),
+            err => {
+                bail!("Wrong error returned: {}", err);
             }
         },
         Ok(_) => {

crates/cdk/src/mint/verification.rs

@@ -192,7 +192,7 @@ impl Mint {
                 output_verification.unit,
                 input_verification.unit
             );
-            return Err(Error::MultipleUnits);
+            return Err(Error::UnitMismatch);
         }
 
         let fees = self.get_proofs_fee(inputs).await?;