If it's possible, I want a bot that can track fake currency for people.

The point would be to let people trade an in-game common currency through a bot without ever actually exchanging the currency itself, since its managed by the bot.

Example:

User A wants to buy some iron from User B. User B wants 1 diamond for his iron, so User A sends User B 1 diamond and User B recieves it.

Another Example:

User B wants to withdraw his one diamond so he can use it in-game. He withdraws it, removing one diamond of credit from his account.

This would require being able to add and remove currency (preferably by the operator of the bot, since the system doesn't attract 100% honesty by users.)

A kind of dogetipbot for an in-game currency.