implemented verifiaction db

api/pkg/db/verification/verification.go

@@ -0,0 +1,28 @@
+package verification
+
+import (
+	"context"
+	"errors"
+	"time"
+
+	"github.com/tech/sendico/pkg/model"
+	"go.mongodb.org/mongo-driver/v2/bson"
+)
+
+var (
+	ErrTokenNotFound    = errors.New("verification token not found")
+	ErrTokenAlreadyUsed = errors.New("verification token already used")
+	ErrTokenExpired     = errors.New("verification token expired")
+)
+
+type DB interface {
+	// template.DB[*model.VerificationToken]
+	Create(
+		ctx context.Context,
+		accountRef bson.ObjectID,
+		purpose model.VerificationPurpose,
+		target string,
+		ttl time.Duration,
+	) (rawToken string, err error)
+	Consume(ctx context.Context, rawToken string) (*model.VerificationToken, error)
+}