Dr. McKay

You have to use getGemValue first because turnItemIntoGems needs the expected value.

You're probably meant to send a POST, which it doesn't seem like you're doing.

Sounds like it's not finding a matching item in their inventory.

If you're only adding items to their side of the trade, of course you wouldn't be offering any of your items.

Need to see more than that. Specifically how you're adding items to it. Also, !offer.state == 11 won't do what you think it does. It translates into (!offer.state) == 11 or false == 11.

We'd need to see code to tell you anything useful.

I don't believe there is one, but be aware that for each item you add to the trade, it takes longer to confirm the trade.

What exactly does this have to do with steam-tradeoffer-manager?

list_of_subs is the list of package IDs it can be applied to. Packages contain apps. You can get package data from steam-user.

I cannot help you with node-steam-bot-manager.

No, it needs to be the sale ID.

You can list items in your OPSkins inventory for sale. Look into the ISales/EditPrice API method.

You must have a problem in BotManager somewhere.

You must be sending the wrong ID to OPSkins then.

That was originally in there, dunno where it went.

Marketability isn't the same as tradability.

That error happens when you're trying to list something that isn't in your Steam inventory (or isn't tradable).

How would you get the name of the game someone is playing if they're not in-game?

You should use GetPlayerSummaries to get what game someone is playing.

There's nothing in the steamcommunity module to get a user's games. Generally it doesn't include stuff for things you can do with the WebAPI.

That's pretty much the right way to do it.

Unless you're conducting tens of thousands of trades a day, that should be fine.

That should work.

It shouldn't matter if your IP keeps changing.

It's just normal polling. It polls (requests) the API on a timer to see if anything has changed. The only possibly more efficient way to do it is to connect to Steam as a client and listen for new incoming trade offers messages and items received messages. They don't tell you details about the trades though, so you need to hit the API anyway. And since they're not foolproof you need to poll on a timer anyway.