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tx: Fix BIP118 ANYPREVOUTANYSCRIPT sighash #513

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Merged
jgriffiths merged 1 commit into from
Jan 21, 2026
Merged

tx: Fix BIP118 ANYPREVOUTANYSCRIPT sighash #513

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7 changes: 4 additions & 3 deletions src/tx_io.c
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Original file line number Diff line number Diff line change
Expand Up @@ -910,7 +910,10 @@ static int bip341_signature_hash(
}
/* Input data */
hash_u8(&io.ctx, (tapleaf_script ? 1 : 0) * 2 + (annex ? 1 : 0)); /* spend_type */
if (sh_anyonecanpay || sh_anyprevout) {
if (sh_anyprevout_anyscript) {
// Note that this means sh_anyonecanpay is set so we check this first
hash_le32(&io.ctx, tx->inputs[index].sequence); /* nSequence */
} else if (sh_anyonecanpay || sh_anyprevout) {
if (sh_anyonecanpay) {
#ifdef BUILD_ELEMENTS
if (is_elements)
Expand All @@ -925,8 +928,6 @@ static int bip341_signature_hash(
else
#endif
txio_hash_input(&io, tx, index, scripts, values, NULL, 0, WALLY_SIGTYPE_SW_V1);
} else if (sh_anyprevout_anyscript) {
hash_le32(&io.ctx, tx->inputs[index].sequence); /* nSequence */
} else {
hash_le32(&io.ctx, index); /* input_index */
}
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