This class implements most of the logic behind the high-level multiplayer API. See also [NetworkedMultiplayerPeer].
By default, [SceneTree] has a reference to this class that is used to provide multiplayer capabilities (i.e. RPC/RSET) across the whole scene.
It is possible to override the MultiplayerAPI instance used by specific Nodes by setting the [member Node.custom_multiplayer] property, effectively allowing to run both client and server in the same scene.
[b]Note:[/b] The high-level multiplayer API protocol is an implementation detail and isn't meant to be used by non-Godot servers. It may change without notice.
</description>
<tutorials>
</tutorials>
<methods>
<methodname="clear">
<returntype="void"/>
<description>
Clears the current MultiplayerAPI network state (you shouldn't call this unless you know what you are doing).
Returns [code]true[/code] if this MultiplayerAPI's [member network_peer] is in server mode (listening for connections).
</description>
</method>
<methodname="poll">
<returntype="void"/>
<description>
Method used for polling the MultiplayerAPI. You only need to worry about this if you are using [member Node.custom_multiplayer] override or you set [member SceneTree.multiplayer_poll] to [code]false[/code]. By default, [SceneTree] will poll its MultiplayerAPI for you.
[b]Note:[/b] This method results in RPCs and RSETs being called, so they will be executed in the same context of this function (e.g. [code]_process[/code], [code]physics[/code], [Thread]).
Sends the given raw [code]bytes[/code] to a specific peer identified by [code]id[/code] (see [method NetworkedMultiplayerPeer.set_target_peer]). Default ID is [code]0[/code], i.e. broadcast to all peers.
If [code]true[/code] (or if the [member network_peer] has [member PacketPeer.allow_object_decoding] set to [code]true[/code]), the MultiplayerAPI will allow encoding and decoding of object during RPCs/RSETs.
[b]Warning:[/b] Deserialized objects can contain code which gets executed. Do not use this option if the serialized object comes from untrusted sources to avoid potential security threats such as remote code execution.
The peer object to handle the RPC system (effectively enabling networking when set). Depending on the peer itself, the MultiplayerAPI will become a network server (check with [method is_network_server]) and will set root node's network mode to master, or it will become a regular peer with root node set to puppet. All child nodes are set to inherit the network mode by default. Handling of networking-related events (connection, disconnection, new clients) is done by connecting to MultiplayerAPI's signals.
The root node to use for RPCs. Instead of an absolute path, a relative path will be used to find the node upon which the RPC should be executed.
This effectively allows to have different branches of the scene tree to be managed by different MultiplayerAPI, allowing for example to run both client and server in the same scene.
</member>
</members>
<signals>
<signalname="connected_to_server">
<description>
Emitted when this MultiplayerAPI's [member network_peer] successfully connected to a server. Only emitted on clients.
</description>
</signal>
<signalname="connection_failed">
<description>
Emitted when this MultiplayerAPI's [member network_peer] fails to establish a connection to a server. Only emitted on clients.
</description>
</signal>
<signalname="network_peer_connected">
<argumentindex="0"name="id"type="int"/>
<description>
Emitted when this MultiplayerAPI's [member network_peer] connects with a new peer. ID is the peer ID of the new peer. Clients get notified when other clients connect to the same server. Upon connecting to a server, a client also receives this signal for the server (with ID being 1).
</description>
</signal>
<signalname="network_peer_disconnected">
<argumentindex="0"name="id"type="int"/>
<description>
Emitted when this MultiplayerAPI's [member network_peer] disconnects from a peer. Clients get notified when other clients disconnect from the same server.
Emitted when this MultiplayerAPI's [member network_peer] receive a [code]packet[/code] with custom data (see [method send_bytes]). ID is the peer ID of the peer that sent the packet.
</description>
</signal>
<signalname="server_disconnected">
<description>
Emitted when this MultiplayerAPI's [member network_peer] disconnects from server. Only emitted on clients.
Used with [method Node.rpc_config] or [method Node.rset_config] to disable a method or property for all RPC calls, making it unavailable. Default for all methods.
Used with [method Node.rpc_config] or [method Node.rset_config] to set a method to be called or a property to be changed only on the remote end, not locally. Analogous to the [code]remote[/code] keyword. Calls and property changes are accepted from all remote peers, no matter if they are node's master or puppets.
Used with [method Node.rpc_config] or [method Node.rset_config] to set a method to be called or a property to be changed only on the network master for this node. Analogous to the [code]master[/code] keyword. Only accepts calls or property changes from the node's network puppets, see [method Node.set_network_master].
Used with [method Node.rpc_config] or [method Node.rset_config] to set a method to be called or a property to be changed only on puppets for this node. Analogous to the [code]puppet[/code] keyword. Only accepts calls or property changes from the node's network master, see [method Node.set_network_master].
