|
Title: Transaction tracking with listsinceblock Post by: bukaj on May 05, 2013, 01:23:07 PM Hi, I'm trying to track incomming transactions using bitcoind RPC API, --blocknotify and listsinceblock:
0. wait for --blocknotify hint 1. execute listsinceblock blockhash, 6 (target-confirmations), where blockhash is empty if running for the first time or lastblock returned by listsinceblock last time (step 3) 2. save to database transactions with confirmations >= 6 and with txid not already in database 3. remember lastblock returned by listsinceblock 4. goto 0 It is working fine and thanks to listsinceblock target-confirmation parameter lastblock is correctly shifted by 6 so I don't ommit any transactions. If I understand correctly during chain fork blocks are lost and listsinceblock will return all transactions again because lastblock won't exist in new blockchain. Questions: A. Is it safe to rely on txid while ignoring already imported transactions in such situation? B. I should also delete already imported transactions not existing in new blockchain, how to detect block chain fork easily using bitcoind RPC API? C. Should I worry about it if accepting only txs with 6 confirmations? |