Using the daemon and not a 3rd party pinging service, what is the best way to get notified of new payments? Do we need to constantly poll the server?
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4AFAIK, there's no way in the standard client to add a callback. Seems like it would be a useful feature though. – Nick ODell Feb 25 '13 at 17:21
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Watch only addresses. On a mobile phone wallet. – vi.su. Feb 25 '13 at 23:03
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Bitcoin New transactions can be discovered by polling using the listsinceblock API command with the Bitcoin.org client.
Beginning with v0.8.2 of the Bitcoin-Qt/bitcoind client is -walletnotify option that can run a process when a transaction that affects the wallet is seen.
The BitsOfProof supernode will offer this as well I believe.
[Update: Thanks to Pelle's answer to a related question,
You can do this using BitcoinJ by implementing the PeerEventListener interface.
The OnTransaction will be called every time a new Transaction is broadcast out and received from a Peer ]
Stephen Gornick
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