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BIP174: Clarify proprietary fields are retained on finalization

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Note that the Input Finalizer retains PSBT_IN_PROPRIETARY fields it does
not understand, treating them like unknown fields so it does not clear
proprietary data it cannot interpret.
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志宇
2026-05-30 05:58:09 +00:00
parent 790c777aeb
commit a4668bb203
1 changed files with 1 additions and 1 deletions
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@@ -514,7 +514,7 @@ 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 the input has a <tt>PSBT_IN_SIGHASH_TYPE</tt> field, the Input Finalizer must fail to finalize that input if any signature does not match the specified sighash type.
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.
All other data except the UTXO and unknown fields (including <tt>PSBT_IN_PROPRIETARY</tt> fields the Input Finalizer does not understand) 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===