Mod Support (Only Trinket Challenge)

local Mod = RegisterMod("yourMod", 1)
local game = Game()

TrinketType.TRINKET_YOUR_TRINKET = Isaac.GetTrinketIdByName("Your Trinket")		-- trinket

-- on post peffect update
function Mod:onModUpdate(player)

	if game:GetFrameCount() == 1
	and onlyTrinkets then
		onlyTrinkets:AddToTrinketPool("TreasurePool", TrinketType.TRINKET_YOUR_TRINKET)
		onlyTrinkets:AddToTrinketPool("ShopPool", TrinketType.TRINKET_YOUR_TRINKET)
		onlyTrinkets:AddToTrinketPool("BossPool", TrinketType.TRINKET_YOUR_TRINKET)
		onlyTrinkets:AddToTrinketPool("SecretPool", TrinketType.TRINKET_YOUR_TRINKET)
		onlyTrinkets:AddToTrinketPool("LibraryPool", TrinketType.TRINKET_YOUR_TRINKET)
		onlyTrinkets:AddToTrinketPool("DevilPool", TrinketType.TRINKET_YOUR_TRINKET)
		onlyTrinkets:AddToTrinketPool("AngelPool", TrinketType.TRINKET_YOUR_TRINKET)
	end
end
Mod:AddCallback(ModCallbacks.MC_POST_PEFFECT_UPDATE, Mod.onModUpdate)