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Title: Detecting when a private key has been swept Post by: kezown on November 14, 2018, 10:59:31 AM Does anyone know how the Casascius Bitcoin Analyzer site knows when a coin is Active/Opened? I'm working on an idea that requires knowing when a private key has been swept by a mobile wallet.
Any info or resources that might be able to help me would be greatly appreciated. Title: Re: Detecting when a private key has been swept Post by: HeRetiK on November 14, 2018, 01:26:13 PM I guess the Casascius Bitcoin Analyzer site simply checks whether a Casascius address had an outgoing transaction.
Apart from that there's no way of knowing whether a private key has been swept because no such information is being tracked or held anywhere. Title: Re: Detecting when a private key has been swept Post by: TryNinja on November 14, 2018, 01:30:57 PM The above.
Keep in mind that anyone could unpeel the Casascius, get the private-key but don't sweep the coins immediately. The only thing that identifies whenever it was swept is an outgoing transaction (like HeRetiK said). Title: Re: Detecting when a private key has been swept Post by: kezown on November 14, 2018, 01:44:22 PM I guess the Casascius Bitcoin Analyzer site simply checks whether a Casascius address had an outgoing transaction. Thanks for your reply. This is what I need. How do I check if a specific address (that I know) had an outgoing transaction? Title: Re: Detecting when a private key has been swept Post by: ABCbits on November 14, 2018, 02:32:30 PM This is what I need. How do I check if a specific address (that I know) had an outgoing transaction? There are few ways : 1. If you're running full node, add address as watch-only address. Then configure walletnotify to run script (https://bitcoin.stackexchange.com/questions/24457/how-do-i-use-walletnotify (https://bitcoin.stackexchange.com/questions/24457/how-do-i-use-walletnotify)) 2. Use 3rd party API/service which notify when there's transaction related with specified address Title: Re: Detecting when a private key has been swept Post by: bigmaster23 on November 14, 2018, 06:42:54 PM You can study programming and create a program that reads privatekey through your own program whether it was swept or not, also you can watch a btc address if it has an outgoing transaction by doing some website crawling and parsing.
Title: Re: Detecting when a private key has been swept Post by: keychainX on November 15, 2018, 07:52:54 AM I guess the Casascius Bitcoin Analyzer site simply checks whether a Casascius address had an outgoing transaction. Thanks for your reply. This is what I need. How do I check if a specific address (that I know) had an outgoing transaction? You need to build a block sniffer and create an sql database of all used keys, then updated the database for each mined blocks. there are a few github repos, just use search, but most likely you could build your own, using python. like this https://github.com/alext234/rpc-sniffer you can also read more on this page https://en.bitcoin.it/wiki/Raw_Transactions#listunspent_.5Bminconf.3D1.5D_.5Bmaxconf.3D999999.5D Ideally you would set up your own full node with the full chain, run a block parser to create an preferably sql database of all txs and then update it whenever a new block is mined. /KX |