All messages are sended as JSON String.\ This json string contains an event name (JSON Key: event) as an string and data (JSON Key: data).\ “data” can contains an other json string to represent complex objects.\
Also there is an key “engine_version” which contains the version of the remote RPG Creator engine.\ For example, if client has sended this message to server, this attribute contains the engine version of client,\ if server sended this message to client, this attribute contains engine version of server.\ Version String is descriped like in Wikipedia (german).\ This means: Major Version.Minor Version.Revision-Build\
Sometimes it is neccessary to get an direct answer of an specific network package.\ For this use case RPG Creator Engine supports acknowledged messages.\ The protocol will be extended with the keys ack_message (true) and msg_uuid (contains the current message unique id).\
Custom messages have to extends ManCenterMessage and have to override afterLoad() method to convert plain data json string to their complex object structure. Also you have to override getData() to convert your complex object to an json string before sending this message.