Dr. McKay

Every time you login with your password to an account that has mobile 2FA enabled, you'll need to supply a code. It doesn't matter how long you wait.

https://github.com/DoctorMcKay/node-steam-tradeoffer-manager/wiki/TradeOfferManager#pollinterval

Figure it out, I'm not going to do your job for you. If you're using node-steamcommunity, the requests it's sending are well-formed. If you aren't, then I can't really help you.

It probably has something to do with the reputation of your IP, dunno.

loadUserInventory has been deprecated for years. You should be using getUserInventoryContents.

Yes.

It's definitely stricter, but it seems to be more than 500/day for me.

Yes, Steam's rate limiting is more strict now. You need to make fewer requests or use more IPs.

The new endpoint has last_assetid, which you should pass as start_assetid for the next request.

Off the top of my head, use start_assetid I think.

Looks like your assetIds variable contains an array of arrays.

async/await doesn't work like that. You'd need to wrap the entire call in a promise and resolve the promise when your callback is done.

This isn't a supported use-case.

I'm not aware of any limits imposed as a result of making trades too quickly, just limits on how many web requests you can make.

You can't. It's not possible to do that kind of thing using the API.