refactored payment orchestration

api/gateway/mntx/storage/storage.go

@@ -0,0 +1,20 @@
+package storage
+
+import (
+	"context"
+
+	"github.com/tech/sendico/gateway/mntx/storage/model"
+	"github.com/tech/sendico/pkg/merrors"
+)
+
+var ErrDuplicate = merrors.DataConflict("payment gateway storage: duplicate record")
+
+type Repository interface {
+	Payouts() PayoutsStore
+}
+
+type PayoutsStore interface {
+	FindByIdempotencyKey(ctx context.Context, key string) (*model.CardPayout, error)
+	FindByPaymentID(ctx context.Context, key string) (*model.CardPayout, error)
+	Upsert(ctx context.Context, record *model.CardPayout) error
+}