From 9633048fc26b28c17b87cba415d58a142f8d6647 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?=E5=BF=97=E5=AE=87?= Date: Fri, 29 May 2026 08:03:28 +0000 Subject: [PATCH] BIP174: Mention sighash type requirement in Input Finalizer section This mirrors the existing PSBT_IN_SIGHASH_TYPE constraint from the per-input field description. Added to the Input Finalizer section so it is not missed. --- bip-0174.mediawiki | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/bip-0174.mediawiki b/bip-0174.mediawiki index 76644d83dc..4fb54d2f30 100644 --- a/bip-0174.mediawiki +++ b/bip-0174.mediawiki @@ -511,7 +511,7 @@ Or, for participants performing fA(psbt) and fB(psbt): Combine(fA(psbt), fB(psbt ===Input Finalizer=== 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 0x07 Finalized scriptSig and 0x08 Finalized scriptWitness and place them into the input key-value map. +For each input, the Input Finalizer determines if the input has enough data to pass validation. If it does, it must construct the 0x07 Finalized scriptSig and 0x08 Finalized scriptWitness and place them into the input key-value map. If the input has a PSBT_IN_SIGHASH_TYPE 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, 0x07 should remain unset rather than assigned an empty array. Likewise, if no scriptWitness exists for an input, 0x08 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.