🔗 UEOS_GameInstance — Epic Online Services Integration for Kingdoms Edge

This Unreal Engine 5 class (UEOS_GameInstance) provides a full Blueprint-accessible interface for Epic Online Services (EOS), designed for multiplayer games like Kingdoms Edge. It acts as a centralized hub for handling EOS login, session creation, matchmaking, party management, friend systems, and user data storage.

Note : This should be copied in the source folder of your project and has therefore no file organisation here.

🎯 Features

• Authentication & Identity

  • Login/logout players
  • Retrieve player nickname, UniqueNetId, and account data

• Session Management

  • Create, join, destroy EOS sessions
  • Search for sessions or friends' sessions
  • Handle session state and settings

• Party System

  • Create, join, leave, and manage parties
  • Promote/kick members, send/cancel invitations
  • Access real-time updates for party events

• Friends System

  • Read friend list
  • Check online status & presence info
  • Respond to friend list changes

• Presence

  • Query and cache player presence data
  • Check if friends are online, in-game, or joinable

• User File Storage

  • Enumerate, read, write, and delete user files on EOS cloud

🧩 Blueprint Integration

The system is fully exposed to Blueprints, making it easy to:

• Build multiplayer menus

• Display friend lists and invite buttons

• Track player status and session transitions

Each functionality has a UFUNCTION(BlueprintCallable) counterpart and is supported by well-structured USTRUCT types (e.g., FTamBPSessionSettings, FTamBPOnlineFriend).

🛠️ Dependencies

This class uses Epic Online Services (EOS) via the Redpoint EOS Online Subsystem Plugin and must be properly configured in the project settings with:

• AuthGraph setup

• EOS credentials

• Plugin path (OnlineLobbyInterface macro must match your platform)

🔄 Delegates

A wide set of FDelegate... types are included to support async operations like login completion, session search results, party invites, and more. These allow clean Blueprint workflows without binding custom C++ logic. 📁 File Location

/Source/Kingdoms_Edge/Public/EOS_Gameinstance.h Include this class in your project by setting it as the custom GameInstance in the Unreal Project Settings.

🚧 TODO / Notes

• Expand support for avatars & crossplay filters

• Integrate richer metadata queries for matchmaking

• Add support for SDK-side party join requests when Epic updates support