[BIP] Normalized transaction IDs
Posted by Tier Nolan
Oct 19, 2015/15:23 UTC
In an email dated October 19, 2015, Christian Decker via bitcoin-dev proposed a new version for normalizing transaction IDs. Similar to the previous version, this proposal also uses a hard fork and only computes the non-malleable parts of a transaction by stripping its signatures before hashing it. For a Coinbase transaction, the normalized transaction ID is equal to the transaction ID (n-txid = txid). However, for non-coinbase transactions, the sigScripts are replaced with empty strings and the txids in TxIns are replaced with n-txid for parents. The second step of this process is recursive starting from the coinbases. Therefore, the rule is that txids are what they would have been if n-txids had been used right from the start.
TLDR
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