Nambi Sankaran
Sep 7, 2018 · 1 min read

Thanks for posting the video. It is really a nice one. Still my question is not answered. Bitcoin ledge is very large now. Suppose someone is posting an old transaction again after 5 years.Ofcourse of the signature of that transaction would be same as the old one. Each minor who receives that transaction must ensure that this transaction was never added into ledger. To achieve that, they have to make sure that the signature of the new transaction is not recorded into any blocks. That means they need to go through the entire block chain.

Is there a easier/faster to find whether a transaction is already part of a block?

    Nambi Sankaran

    Written by