Casting to Game Instance

After your Player Connects Wallet, you'll want to present the Player BNS on the Main Menu. You will also want to use the players principal address during actual game play to discover various things, such as token balances and ownership status of NFTs, this is also needed for arguments during calling on-chain functionality. To do this you'll need to leverage the GameInstance, PlayerState, and PlayerController to get this into the game, as well as a Custom Event that executes on the server for multiplayer context.

GI_Cryptonauts

Your project might already have a Subclass of the inherent GameInstance . If not, you will need to create one. In our documentation we will be using our GI_Cryptonauts

Note: We set our GameInstance subclass GI_Cryptonauts as our Game Instance Class in our Project Settings

GI_Principal

We will need add 1 variable of GI_Principal (String type) and add 2 new functions to our GI_Cryptonauts event graph:

function: setGI_Principal

function: getGI_Principal

BP_PlayerState_Cryptonauts

Your project might already have a Subclass of the inherent PlayerState . If not, you will need to create one. In our documentation we will be using our BP_PlayerState_Cryptonauts We don't need much in our BP_PlayerState_Cryptonauts subclass, just a Replicated String Variable name PS_Principal

BP_PlayerController

Your project might already have a Subclass of the inherenet PlayerController . If not, you will need to create one. In our documentation we will be using our BP_PlayerController

At BeginPlay we do a slight delay, to ensure enough load time has passed, then we check for isLocalController, and then we Cast to GI_Cryptonauts and call our getGI_Principal function, to return our principal that was passed during client auth. From there we call our custom event of Server_Put_PS_Principal (see next section)

Server_Put_PS_Principal

Our Server_Put_PS_Principal Custom Event should have Replication as Run on Server, and Reliable Checked to indicate true. The Custom Event should also have an additional Input on it of type String with a label of InPrincipal We drag from the execution wire and Cast to our BP_PlayerController_Cryptonauts

Drag the blue As BP Player Controller Cryptonaut output as then type Set PS Principal and, be sure to wire in the pink string input InPrincipal to the PS_Principal in your setter. To test, you can also add some print strings to see the details show up on screen, after you've connected on Main Menu and then transitioned into a Map.

Level World Settings

Be sure to use the Player Controller Class as BP_PlayerController and the Player State Class as BP_PlayerState_Cryptonauts (Or what ever you named your SubClasses as)