[hw-3] loms service

loms/internal/domain/model/errors.go

@@ -0,0 +1,13 @@
+package model
+
+import "errors"
+
+var (
+	ErrInvalidInput = errors.New("invalid input")
+
+	ErrNotEnoughStocks = errors.New("not enough stocks")
+	ErrUnknownStock    = errors.New("unknown stock provided")
+
+	ErrOrderNotFound      = errors.New("order not found")
+	ErrOrderInvalidStatus = errors.New("invalid order status")
+)