syntax = "proto2"; import "game_commands.proto"; message Command_AttachCard { extend GameCommand { optional Command_AttachCard ext = 1009; } optional string start_zone = 1; optional sint32 card_id = 2 [default = -1]; optional sint32 target_player_id = 3 [default = -1]; optional string target_zone = 4; optional sint32 target_card_id = 5 [default = -1]; }