Callback Setting

To use Billing API and coomunicate with PC SDK, the game has to re-define the callback functions of StovePCCallback

struct StovePCCallback
{
     void(*OnError)(const StovePCError error);
     void(*OnInitComplete)();
     void(*OnToken)(const StovePCToken token);
     void(*OnUser)(const StovePCUser user);
     void(*OnOwnership)(int size, StovePCOwnership* ownership);

     // Callback called when FetchShopCategories processing is complete
     void(*OnFetchShopCategories) OnFetchShopCategories;

     // Callback called when FetchProducts processing is complete
     void(*OnFetchProducts) OnFetchProducts;

     // Callback called when StartPurchase processing is complete
     void(*OnStartPurchase) OnStartPurchase;

     // Callback called when ConfirmPurchase processing is complete
     void(*OnConfirmPurchase) OnConfirmPurchase;
    
     // Callback called when FetchInventory processing is complete
     void(*OnFetchInventory) OnFetchInventory;
}
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As in Config, Callback setting, override the callback function to receive the event.

// Create StovePCCallback structure instance
StovePCCallback callback;
  
// Initialize all function pointers to NULL
memset(&callback, 0, sizeof(StovePCCallback));
  
// Link implemented function pointers
callback.OnError = OnMyErrorCallback; /* Callback function defined globally */
callback.OnInitComplete = OnMyInitCompleteCallback; /* Callback function defined globally */
callback.OnToken = OnMyTokenCallback; /* Callback function defined globally */
callback.OnUser = OnMyUserInfoCallback; /* Callback function defined globally */
callback.OnOwnership = OnMyOwnershipCallback; /* Callback function defined globally */
   
    
// billing service
OnFetchShopCategories = OnMyFetchShopCategories; /* Callback function defined globally */
OnFetchProducts = OnMyFetchProducts; /* Callback function defined globally */
OnStartPurchase = OnMyStartPurchase; /* Callback function defined globally */
OnConfirmPurchase = OnMyConfirmPurchase; /* Callback function defined globally */
OnFetchInventory = OnMyFetchInventory; /* Callback function defined globally */
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You are not required to implement the OnFetchShopCategories, OnFetchProducts, OnStartPurchase, OnConfirmPurchase, OnFetchInventory callback at the start of the game - only implement it when needed from the game.

However, for the In-Game purchase to function, all 5 callbacks must be implemented and connected.