question

Hello, I couldn't find online any information about the implementation of matchmaking using OnlineSubsystemPlayfab, I promise to open-source my code if you can help me out so that others can have a smoother experience in the future. I do know how to do it with findsession and joinsession, but as far as I understand it won't open the dedicated server, and the way to do it using the cloud system is with startmatchmaking

This is what I currently did

 #include "MatchmakingManager.h"
 #include "OnlineSubsystemPlayFab.h"
 #include "Interfaces/OnlineSessionInterface.h"
 #include "OnlineSessionSettings.h"
 void AMatchmakingManager::BeginPlay()
 {
     IOnlineSubsystem* OnlineSubsystem = IOnlineSubsystem::Get();
     IOnlineSessionPtr session = OnlineSubsystem->GetSessionInterface();
     IOnlineIdentityPtr IdentityInterface = OnlineSubsystem->GetIdentityInterface();
    
     FOnlineSessionSettings SessionSettings;
     SessionSettings.bAllowInvites = true;
     SessionSettings.bAllowJoinInProgress = true;
     SessionSettings.bAllowJoinViaPresence = true;
     SessionSettings.bAllowJoinViaPresenceFriendsOnly = false;
     SessionSettings.bAntiCheatProtected = false;
     SessionSettings.bIsDedicated = true;
     SessionSettings.bIsLANMatch = false;
     SessionSettings.bShouldAdvertise = true;
     SessionSettings.bUseLobbiesIfAvailable = true;
     SessionSettings.bUseLobbiesVoiceChatIfAvailable = true;
     SessionSettings.bUsesPresence = true;
     SessionSettings.bUsesStats = true;
    
     TSharedRef<FOnlineSessionSearch> SessionSearch = MakeShareable(new FOnlineSessionSearch());
     SessionSearch.Get().bIsLanQuery = false;
     SessionSearch.Get().MaxSearchResults = 1;
    
     FOnStartMatchmakingComplete StartMatchmakingCompleteDelegate;
     StartMatchmakingCompleteDelegate.BindUObject(this, &AMatchmakingManager::OnStartMatchmakingComplete);
    
     TArray<FSessionMatchmakingUser> LocalPlayers;
     FSessionMatchmakingUser MatchmakingUser;
     MatchmakingUser.UserId = IdentityInterface->GetUniquePlayerId(0).ToSharedRef();
     LocalPlayers.Add(MatchmakingUser);
     session->StartMatchmaking(LocalPlayers, FName("Playtest"), SessionSettings, SessionSearch, StartMatchmakingCompleteDelegate);
 }

Here's the function that it will call once complete:

 void AMatchmakingManager::OnStartMatchmakingComplete(FName SessionName, const FOnlineError& ErrorDetails, const FSessionMatchmakingResults& Results)
 {
     // on matchmaking complete logic
 }

I noticed that FSessionMatchmakingResults is a "Stub struct that can be easily added to without requiring delegate signature changes". Am I expected to populate it with properties so that I can get information from the results? How do I even make sure that playfab is using the right build?

Would love to hear how to continue from there.

By the way, I did create a working matchmaking with the default Playfab package, but it does not support voice-chat by default as OnlineSubsystemPlayfab does