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I am trying to figure out how blockchain.info gets the following API functions and is there any way to do these calls on a server (without using their API) perhaps through bitcoind?

https://blockchain.info/q/addressfirstseen/
https://blockchain.info/q/addressbalance/

Thanks.

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I'm actually working on doing this. To get the balance of an address you have to scan the entire blockchain. This can take a while but blockchain.info returns the balance instantly, which means they've already scanned the entire blockchain and are tracking all addresses. That's a lot of data to store, several gigabytes worth.

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  • Interesting, thanks! I thought it would have been easier.
    – Jonovono
    Dec 6, 2013 at 19:43

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