How do you deal with scenarios when the same user has 2 browser windows of the extension open?

[Dist]

@BarryCarlyon

Well you still need to stop them getting gold tokens twice for a given transaction

Each useBits transaction has a single id, regardless of how many tabs that receipt is sent to. I could be sent a thousand to my EBS, 1 id = 1 transaction = 1 increase in ‘tokens’ by the SKU used. Once the ID is in the database, all future messages sent to the EBS with that ID can be dropped.