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BIP 0174: Clarify use of PSBT_IN_FINAL_* when data is empty #1221

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Merged
luke-jr merged 1 commit into from
Nov 4, 2021
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BIP 0174: Clarify use of PSBT_IN_FINAL_* when data is empty #1221

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2 changes: 2 additions & 0 deletions bip-0174.mediawiki
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Expand Up @@ -798,6 +798,8 @@ Or, for participants performing fA(psbt) and fB(psbt): Combine(fA(psbt), fB(psbt

The Input Finalizer must only accept a PSBT.
For each input, the Input Finalizer determines if the input has enough data to pass validation. If it does, it must construct the <tt>0x07</tt> Finalized scriptSig and <tt>0x08</tt> Finalized scriptWitness and place them into the input key-value map.
If scriptSig is empty for an input, <tt>0x07</tt> should remain unset rather than assigned an empty array.
Likewise, if no scriptWitness exists for an input, <tt>0x08</tt> should remain unset rather than assigned an empty array.
All other data except the UTXO and unknown fields in the input key-value map should be cleared from the PSBT. The UTXO should be kept to allow Transaction Extractors to verify the final network serialized transaction.

===Transaction Extractor===
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