Steam inspect link for CS contains 3 params: S for owner steam id, A for asset id and some unclear param D.
 
	I noticed when you request inventory or GetAssetClassInfo this param can change for same instanceid + classid combination every request, even when item is the same.
 
	So i have this questions:
 
	
		Any ideas what does D means and how it is used? It is just some hash to prevent data scraping?
	
	
		Can we rely on any value of D received from steam for persist cache of metadata or it can change and we need to update it in cache every time?
	
	In node-steam-tradeoffer-manager there is cache mechanism that stores descriptions without TTL, so seems like inspect link for any instanceid + classid combination is actual forever, but this D param confusing me