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Bitcoin Armory is a client that sits on top of the official bitcoin client. Bitcoinj is a totally different client, separate from the official bitcoin client. Does Electrum also need the official bitcoin client, or is it separate?
Does Electrum require the Satoshi client?
Answers
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No, Electrum doesn't require Bitcoin-Qt to be installed on your computer. Electrum and BitcoinJ aren't full clients, though, so they do rely on Bitcoin-Qt at some level -- Electrum through the Stratum network and BitcoinJ through the Bitcoin network's SPV mode.
2It might be also good to add that Electrum doesn't require a local copy of the blockchain. – 7anner – 2013-06-14T16:50:30.713
@theymos Electrum uses Electrum Servers that store the blockchain and broadcast signed transactions – rdymac – 2013-06-19T01:22:58.237
1@rdymac Yeah, and those servers run Bitcoin-Qt. – theymos – 2013-06-19T03:18:27.080
Sorry, I was answering to @7anner – rdymac – 2013-06-19T23:46:15.937