How unique are inventory item instance IDs?

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danielsoto asked Sep 1, '22

How unique are inventory item instance IDs?

Hi,

Are inventory instance IDs unique between different players? Or can be repeated? For example:

If I have an inventory Item with a certain Instance ID, does it exist the possibility of reading the inventory from another player and founding an item which also has the same Instance ID than mine?

Thanks for all.

Player Inventory

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Answer 1 · 2022-09-05T01:36:53Z

danielsoto answered Sep 5, '22

Hi Gao, thanks for your reply.

I'm loading Item instances IDs from different players on client, so I need to know if they are truly unique to choose the correct data structure:

Dictionary<PlayFabID + ItemInstanceID, ItemData> in case of not being unique
Dictionary<ItemInstanceID, ItemData> in other case.

I would love to do the second proposal, but first I need to know clearly that IDs are unique regardless the players.

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Gosen Gao commented · Sep 05, 2022 at 07:52 AM

We would recommend using first proposal, as the ItemInstanceId is not guaranteed to be unique in the title.

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Answer 2 · 2022-09-01T07:10:39Z

Gosen Gao answered Sep 1, '22

The uniqueness of the ItemInstanceId only needs to meet the requirements. No matter it is unique in title or in player inventory, the situation you mentioned will not happen. Because when you want to modify or get the Item Instances, you also need to specify the PlayFabId, which will specify the player inventory to access.

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