hotfix: fix db error

api/cashu/keys_test.go

@@ -88,14 +88,15 @@ func TestChangeProofsStateToPendingAndQuoteSet(t *testing.T) {
 	if proofs[0].State != PROOF_PENDING {
 		t.Errorf("proof transformation not working, should be: %v ", proofs[1].State)
 	}
-	if proofs[0].Quote != "123" {
-		t.Errorf("proof transformation not working, should be: %v ", "123")
+    res := "123"
+	if *proofs[0].Quote != res {
+        t.Errorf("proof transformation not working, should be: %v. is:  ", "123")
 	}
 	if proofs[1].State != PROOF_PENDING {
 		t.Errorf("proof transformation not working, should be: %v ", proofs[1].State)
 
 	}
-	if proofs[1].Quote != "123" {
+	if *proofs[1].Quote != res {
 		t.Errorf("proof transformation not working, should be: %v ", "123")
 	}
 

api/cashu/types.go

@@ -153,7 +153,7 @@ type Proofs []Proof
 func (p *Proofs) SetPendingAndQuoteRef(quote string) {
 	for i := 0; i < len(*p); i++ {
 		(*p)[i].State = PROOF_PENDING
-		(*p)[i].Quote = quote
+		(*p)[i].Quote = &quote
 	}
 }
 
@@ -165,7 +165,7 @@ func (p *Proofs) SetProofsState(state ProofState) {
 
 func (p *Proofs) SetQuoteReference(quote string) {
 	for i := 0; i < len(*p); i++ {
-		(*p)[i].Quote = quote
+		(*p)[i].Quote = &quote
 	}
 }
 
@@ -178,7 +178,7 @@ type Proof struct {
 	Witness string     `json:"witness" db:"witness"`
 	SeenAt  int64      `json:"seen_at"`
 	State   ProofState `json:"state"`
-	Quote   string     `json:"quote" db:"quote"`
+	Quote   *string    `json:"quote" db:"quote"`
 }
 
 func (p Proof) VerifyWitness(spendCondition *SpendCondition, witness *Witness, pubkeysFromProofs *map[*btcec.PublicKey]bool) (bool, error) {

internal/routes/mint.go

@@ -250,7 +250,7 @@ func v1MintRoutes(r *gin.Engine, mint *m.Mint, logger *slog.Logger) {
 
 		if err != nil {
 			logger.Error("database.CheckListOfProofs(pool, SecretsList)", slog.String(utils.LogExtraInfo, err.Error()))
-			c.JSON(400, cashu.ErrorCodeToResponse(cashu.KEYSET_NOT_KNOW, nil))
+			c.JSON(400, cashu.ErrorCodeToResponse(cashu.UNKNOWN, nil))
 			return
 		}