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Title: Bitcoind transaction notification Post by: Vantix on May 28, 2013, 01:26:27 PM What is the best way to get an HTTP callback when bitcoind client receive an input/output transaction?
Thank you all Title: Re: Bitcoind transaction notification Post by: Stephen Gornick on May 28, 2013, 02:05:14 PM What is the best way to get an HTTP callback when bitcoind client receive an input/output transaction? Thank you all The Bitcoin-Qt/bitcoind client does not have any callback, so the main method employed currently is to poll the client to discover new transactions (using listsinceblock). BitcoinJ does support this with a PeerEventListener interface: - http://bitcoin.stackexchange.com/a/8133/153 Also, BitsOfProof possibly supports a callback for new transactions as well. [Edit: And most payment processors, e.g., BitPay, provide this within their API.] [Edit2: And you can configure Blockchain.info/wallet to notify you: - http://blockchain.info/wallet/payment-notifications ] Title: Re: Bitcoind transaction notification Post by: Zeilap on May 28, 2013, 02:16:52 PM Actually, there are two command line switches -blocknotify and -walletnotify which will call a command when a block is found and when transactions arrive.
Honestly, I would avoid using listsinceblock, it doesn't behave as you'd expect and it'll come back to bite you. Title: Re: Bitcoind transaction notification Post by: kjj on May 28, 2013, 02:22:27 PM The 8.2 release candidates include a -walletnotify option that can run a process when a transaction that affects the wallet is seen. It would be fairly simple to write a script for that to call curl or wget to create a HTTP callback.
If your bitcoind is busy (or will be some day), or if the callback server is unreliable, it would be wiser to do it in two stages. The -walletnotify could drop an entry into a database, and a second process could read those entries and execute the calls. The reason is that the -walletnotify process needs to return promptly to avoid runaway processes. Title: Re: Bitcoind transaction notification Post by: Stephen Gornick on May 28, 2013, 02:26:18 PM Actually, there are two command line switches -blocknotify and -walletnotify which will call a command when a block is found and when transactions arrive. Ah, thanks for that! Here's more info on it: How to use Walletnotify? - http://bitcointalk.org/index.php?topic=203438.0 |