initial commit

internal/service/errors.go

@@ -0,0 +1,16 @@
+package service
+
+import "errors"
+
+var (
+	ErrNotFound           = errors.New("resource not found")
+	ErrAlreadyExists      = errors.New("resource already exists")
+	ErrInvalidInput       = errors.New("invalid input")
+	ErrUnauthorized       = errors.New("unauthorized")
+	ErrForbidden          = errors.New("forbidden")
+	ErrInternal           = errors.New("internal server error")
+	ErrValidation         = errors.New("validation failed")
+	ErrConflict           = errors.New("conflict")
+	ErrRateLimited        = errors.New("rate limited")
+	ErrServiceUnavailable = errors.New("service unavailable")
+)