refactor: remove get single blinded sig

crates/cdk-redb/src/mint/mod.rs

@@ -647,27 +647,9 @@ impl MintDatabase for MintRedbDatabase {
         Ok(())
     }
 
-    async fn get_blinded_signature(
-        &self,
-        blinded_message: &PublicKey,
-    ) -> Result<Option<BlindSignature>, Self::Err> {
-        let db = self.db.lock().await;
-        let read_txn = db.begin_read().map_err(Error::from)?;
-        let table = read_txn
-            .open_table(BLINDED_SIGNATURES)
-            .map_err(Error::from)?;
-
-        match table.get(blinded_message.to_bytes()).map_err(Error::from)? {
-            Some(blind_signature) => {
-                Ok(serde_json::from_str(blind_signature.value()).map_err(Error::from)?)
-            }
-            None => Ok(None),
-        }
-    }
-
     async fn get_blinded_signatures(
         &self,
-        blinded_messages: Vec<PublicKey>,
+        blinded_messages: &[PublicKey],
     ) -> Result<Vec<Option<BlindSignature>>, Self::Err> {
         let db = self.db.lock().await;
         let read_txn = db.begin_read().map_err(Error::from)?;

crates/cdk-sqlite/src/mint/mod.rs

@@ -657,34 +657,9 @@ VALUES (?, ?, ?, ?);
 
         Ok(())
     }
-    async fn get_blinded_signature(
-        &self,
-        blinded_message: &PublicKey,
-    ) -> Result<Option<BlindSignature>, Self::Err> {
-        let rec = sqlx::query(
-            r#"
-SELECT *
-FROM blind_signature
-WHERE y=?;
-        "#,
-        )
-        .bind(blinded_message.to_bytes().to_vec())
-        .fetch_one(&self.pool)
-        .await;
-
-        let rec = match rec {
-            Ok(rec) => rec,
-            Err(err) => match err {
-                sqlx::Error::RowNotFound => return Ok(None),
-                _ => return Err(Error::SQLX(err).into()),
-            },
-        };
-
-        Ok(Some(sqlite_row_to_blind_signature(rec)?))
-    }
     async fn get_blinded_signatures(
         &self,
-        blinded_messages: Vec<PublicKey>,
+        blinded_messages: &[PublicKey],
     ) -> Result<Vec<Option<BlindSignature>>, Self::Err> {
         let mut signatures = Vec::with_capacity(blinded_messages.len());
         for message in blinded_messages {

crates/cdk/src/cdk_database/mint_memory.rs

@@ -287,21 +287,9 @@ impl MintDatabase for MintMemoryDatabase {
         Ok(())
     }
 
-    async fn get_blinded_signature(
-        &self,
-        blinded_message: &PublicKey,
-    ) -> Result<Option<BlindSignature>, Self::Err> {
-        Ok(self
-            .blinded_signatures
-            .read()
-            .await
-            .get(&blinded_message.to_bytes())
-            .cloned())
-    }
-
     async fn get_blinded_signatures(
         &self,
-        blinded_messages: Vec<PublicKey>,
+        blinded_messages: &[PublicKey],
     ) -> Result<Vec<Option<BlindSignature>>, Self::Err> {
         let mut signatures = Vec::with_capacity(blinded_messages.len());
 

crates/cdk/src/cdk_database/mod.rs

@@ -232,14 +232,9 @@ pub trait MintDatabase {
         blinded_messages: &[PublicKey],
         blind_signatures: &[BlindSignature],
     ) -> Result<(), Self::Err>;
-    /// Get [`BlindSignature`]
-    async fn get_blinded_signature(
-        &self,
-        blinded_message: &PublicKey,
-    ) -> Result<Option<BlindSignature>, Self::Err>;
     /// Get [`BlindSignature`]s
     async fn get_blinded_signatures(
         &self,
-        blinded_messages: Vec<PublicKey>,
+        blinded_messages: &[PublicKey],
     ) -> Result<Vec<Option<BlindSignature>>, Self::Err>;
 }

crates/cdk/src/mint/mod.rs

@@ -470,27 +470,31 @@ impl Mint {
             MintQuoteState::Paid => (),
         }
 
-        for blinded_message in &mint_request.outputs {
-            if self
-                .localstore
-                .get_blinded_signature(&blinded_message.blinded_secret)
-                .await?
-                .is_some()
-            {
-                tracing::info!(
-                    "Output has already been signed: {}",
-                    blinded_message.blinded_secret
-                );
-                tracing::info!(
-                    "Mint {} did not succeed returning quote to Paid state",
-                    mint_request.quote
-                );
+        let blinded_messages: Vec<PublicKey> = mint_request
+            .outputs
+            .iter()
+            .map(|b| b.blinded_secret)
+            .collect();
 
-                self.localstore
-                    .update_mint_quote_state(&mint_request.quote, MintQuoteState::Paid)
-                    .await?;
-                return Err(Error::BlindedMessageAlreadySigned);
-            }
+        if self
+            .localstore
+            .get_blinded_signatures(&blinded_messages)
+            .await?
+            .iter()
+            .flatten()
+            .next()
+            .is_some()
+        {
+            tracing::info!("Output has already been signed",);
+            tracing::info!(
+                "Mint {} did not succeed returning quote to Paid state",
+                mint_request.quote
+            );
+
+            self.localstore
+                .update_mint_quote_state(&mint_request.quote, MintQuoteState::Paid)
+                .await?;
+            return Err(Error::BlindedMessageAlreadySigned);
         }
 
         let mut blind_signatures = Vec::with_capacity(mint_request.outputs.len());
@@ -577,19 +581,24 @@ impl Mint {
         &self,
         swap_request: SwapRequest,
     ) -> Result<SwapResponse, Error> {
-        for blinded_message in &swap_request.outputs {
-            if self
-                .localstore
-                .get_blinded_signature(&blinded_message.blinded_secret)
-                .await?
-                .is_some()
-            {
-                tracing::error!(
-                    "Output has already been signed: {}",
-                    blinded_message.blinded_secret
-                );
-                return Err(Error::BlindedMessageAlreadySigned);
-            }
+        let blinded_messages: Vec<PublicKey> = swap_request
+            .outputs
+            .iter()
+            .map(|b| b.blinded_secret)
+            .collect();
+
+        if self
+            .localstore
+            .get_blinded_signatures(&blinded_messages)
+            .await?
+            .iter()
+            .flatten()
+            .next()
+            .is_some()
+        {
+            tracing::info!("Output has already been signed",);
+
+            return Err(Error::BlindedMessageAlreadySigned);
         }
 
         let proofs_total = swap_request.input_amount();
@@ -959,19 +968,21 @@ impl Mint {
             .ok_or(Error::UnknownQuote)?;
 
         if let Some(outputs) = &melt_request.outputs {
-            for blinded_message in outputs {
-                if self
-                    .localstore
-                    .get_blinded_signature(&blinded_message.blinded_secret)
-                    .await?
-                    .is_some()
-                {
-                    tracing::error!(
-                        "Output has already been signed: {}",
-                        blinded_message.blinded_secret
-                    );
-                    return Err(Error::BlindedMessageAlreadySigned);
-                }
+            let blinded_messages: Vec<PublicKey> =
+                outputs.iter().map(|b| b.blinded_secret).collect();
+
+            if self
+                .localstore
+                .get_blinded_signatures(&blinded_messages)
+                .await?
+                .iter()
+                .flatten()
+                .next()
+                .is_some()
+            {
+                tracing::info!("Output has already been signed",);
+
+                return Err(Error::BlindedMessageAlreadySigned);
             }
         }
 
@@ -1061,7 +1072,7 @@ impl Mint {
 
         let blinded_signatures = self
             .localstore
-            .get_blinded_signatures(blinded_message)
+            .get_blinded_signatures(&blinded_message)
             .await?;
 
         assert_eq!(blinded_signatures.len(), output_len);