How to create a unique online inventory for all players

Hello everyone,

I’m creating my first online farming game, but got stuck with the idea on how to make an online inventory. This is a single player game, and that special inventory has the following features:

+ It is the only inventory used and accessed by all players in the game. It is not an in-game inventory for each player.
+ Its items are unique and can only be possessed by a specific player at a time after that player completes a special mission fisrt or by purchase.
+ Its items have some levels to upgrade when used in a while, so when their owner sell them back to the inventory, the following purchasers will be able to continue upgrading those items at their latest level.

This is not a multiplayer game and I can’t take the advantages of replication from server-client form. Is there any feature in epic online subsystem helpful, I’ve been monkeying with that EOS for a week, but there is no result.

I’m thankful for every of your precious consultations! :smile: