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Title: double spend attempt, client none the wiser Post by: netrin on July 05, 2011, 05:54:12 PM Early last month, while trying to understand keys, wallets, security, and backup, I believe I inadvertently attempted to double spend. The client is not handling it gracefully (the UI displays two semi-duplicate transactions neither of which occurred and a zero balance even after thousands of blocks). While I am not entirely sure about the order of events, I believe the following steps might be correct:
I created a wallet (A), received coins, sent coins, closed client. I copied wallet, rescanned with new copy (B), and sent the same coins to different addresses. Now, when I open wallet A, I see a transaction sent to <blank> address with almost 7000 confirmations. In the new client I ALSO have a similar transaction sent to an address not known to the blockexplorer with the exact same June timestamp but with 0/unconfirmed. While I would like to think the coins are still available to me, I believe they were actually sent (from the copied B wallet). I'll be happy to disclose the addresses in question to client developers (PM me) in order to improve the client transactional log. -- But aside from this odd behavior, it highlights the need for more address transparency. I can not see to what address the transaction is sending (abnormal), nor can I see from which address the coins are coming (normal). In this case, I can guess at the sending addresses because I've received with a limited number of addresses. I do not know what addresses are 'hidden' in my wallet, and therefore do not know whether wallet A is a pure subset of B and can thus be deleted. My personal feeling on the UX matter is to think of and display addresses as accounts and a wallet as a portfolio. I think the wallet metaphor creates confusion. Title: Re: double spend attempt, client none the wiser Post by: Pieter Wuille on July 05, 2011, 07:25:14 PM See http://forum.bitcoin.org/index.php?topic=5920.0
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