In Txin
, there is a double hash of the previous transaction.
Why? What purpose does that serve? How is this data used later?
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, there is a double hash of the previous transaction.
Why? What purpose does that serve? How is this data used later?
I believe it is one of the principles of Bitcoin, to make transactions you first have to have a valid transaction it stems from. If the previous transaction is not valid than the first transaction isn't valid as well.