BitcoinJ instance shutting down before transaction confirmation

Question

I am currently working on developing an application in blockchain that accepts BTC as payment. But there seeems to be a problem. When I am sending btc to the wallet, it says transaction received, but it has no confirmation.

Now, I am creating future listener to event for 3rd confirmation of the transaction. What will happen if the app get down before future listener executed? It is not eventing after i restart the app. What can i do at this point?

Answer 1

Instead of attaching to an individual transaction you could attach a WalletChangeEventListener (docs). It is called, among other things, when a new block is found and a confirmation is added to a transaction. If registered before the event loop is started it should get called on each block even during the sync with the rest of the network, mimicking being online during the confirmation period.