new_assetid from getExchangeDetails is undefined

[rsnrdk]

Hi everyone!
Any updates on this topic?

Currently the issue is still not fixed, maybe someone figured out another way to reliably determine who sent which item without new asset_id?

I tried to check by Item Certificate but it also changes after trade between users.

[TheMaster]

use the get inventory contents for hte new assetid

[rsnrdk]

8 hours ago, TheMaster said:

use the get inventory contents for hte new assetid

Thank you for the answer!

You mean I should compare my Bot`s inventory before and after the trade and then exctract the new items by asset_ids that i didn`t have before trade right?

[TheMaster]

yes after the trade the new asset id is visible so just set up a inventory poll and u should be good any steam trading bot does inventory poll but be careful not to set the poll too frequent u can get ratelimited very fast.
the old asset id is still in the event handler response so u have both the new id and the old one how i do it is i store a template of the doc in db then use a backfill script to fill in the new asset id.
Hope that helps
Regards

[rsnrdk]

7 hours ago, TheMaster said:

yes after the trade the new asset id is visible so just set up a inventory poll and u should be good any steam trading bot does inventory poll but be careful not to set the poll too frequent u can get ratelimited very fast.
the old asset id is still in the event handler response so u have both the new id and the old one how i do it is i store a template of the doc in db then use a backfill script to fill in the new asset id.
Hope that helps
Regards

Thank you very much!😉

[profesor]

On 8/30/2026 at 4:30 PM, TheMaster said:

yes after the trade the new asset id is visible so just set up a inventory poll and u should be good any steam trading bot does inventory poll but be careful not to set the poll too frequent u can get ratelimited very fast.
the old asset id is still in the event handler response so u have both the new id and the old one how i do it is i store a template of the doc in db then use a backfill script to fill in the new asset id.
Hope that helps
Regards

This would work fine for single item trades but exact pairings of assets still cant be achieved using that.

[rsnrdk]

On 8/31/2026 at 6:23 PM, profesor said:

This would work fine for single item trades but exact pairings of assets still cant be achieved using that.

Why not? When I save the bot`s inventory data before trade, then after the trade i just compare old inventory with the new one.
No matter how much items user will send to my bot.

I mean the logic should work like this:

Inventory assets before trade:
1111
2222
3333

Inventory assets after trade:
1111
2222
3333
4444
5555

the new one are 4444 and 5555.

So the comparison, in theory, should work on DB level.

Currently I did not implement this feature due to a large amount of work on other aspects of my project and Im also trying to figure out how to correctly implement this kind of feature.

I will be very gratefull if you can clarify how to do this