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I am developing a program that monitors transactions. The first question is how can I know there is a new transaction? I can consider the command listtransactions. However, there is a bit of an issue about this command which I posted in another thread. In short, I can't list transactions from all accounts by NOT providing the account parameter. Even if it works for me. The API says: listtransactions [account] [count=10] [from=0] Returns up to [count] most recent transactions skipping the first [from] transactions for account [account]. If [account] is not provided it will return recent transactions from all accounts.

I ran this command with parameters: "", 1,3. I still got the first 3 transactions.

Does anybody have a better idea about how to get new transactions that have not been checked?

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  • No answers yet? If you happen to find the answer somewhere else (e.g. Forums), please post it back here.
    – ripper234
    Commented Nov 20, 2011 at 17:15

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First: to get transactions from all accounts, use the "*" wildcard.

Second: Bitcoin version 0.5 includes a new listsinceblock RPC command that makes polling for new transactions more efficient.

I wrote a monitorreceived patch that does an HTTP POST whenever a new block or transaction-to-or-from-your-wallet was received, but I haven't pulled it into mainline bitcoin because it would make it VERY easy for websites to do the wrong thing and treat 0-confirmation transactions as "paid" and because it isn't clear what (if anything) to do when block chain re-organizations happen or transactions are orphaned (double-spent).

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    Perhaps make it configurable how many confirmations are needed for it to trigger, having it default to 6. I think it's generally accepted that if you trigger on 6 confirmations, you can ignore the possibility of re-organizations.
    – David Schwartz
    Commented Dec 13, 2011 at 2:30

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