syntax = "proto3"; package kratos.errors; option go_package = "github.com/go-kratos/kratos/v2/errors;errors"; option java_multiple_files = true; option java_package = "com.github.kratos.errors"; option objc_class_prefix = "KratosErrors"; message Error { int32 code = 1; string reason = 2; string message = 3; map metadata = 4; };