From b217897a628e3d5db369497d2697f76e5bab7f4d Mon Sep 17 00:00:00 2001
From: macgyver13 <4712150+macgyver13@users.noreply.github.com>
Date: Thu, 9 Apr 2026 10:42:10 -0400
Subject: [PATCH] BIP-375: fix label byte order used by labelhash

Test vectors with labels now use big-endian byte order instead of little-endian, matching BIP-352 specification

Summary of test vector changes:
- psbt structure: missing PSBT_OUT_SP_V0_INFO field when PSBT_OUT_SP_V0_LABEL set
- can finalize: one P2WPKH input / two mixed outputs - labeled sp output and BIP 32 change
- can finalize: two sp outputs - output 0 uses label=3 / output 1 uses label=1
---
 bip-0375/bip375_test_vectors.json | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/bip-0375/bip375_test_vectors.json b/bip-0375/bip375_test_vectors.json
index f6b01319..3f16f51b 100644
--- a/bip-0375/bip375_test_vectors.json
+++ b/bip-0375/bip375_test_vectors.json
@@ -10,7 +10,7 @@
   "invalid": [
     {
       "description": "psbt structure: missing PSBT_OUT_SP_V0_INFO field when PSBT_OUT_SP_V0_LABEL set",
-      "psbt": "cHNidP8B+wQCAAAAAQIEAgAAAAEEAQEBBQEBAQYBAAABDiAYpxdmOwurFLEqGncTI/8eQHndUy5d0T4o6hCBxwCYSgEPBAAAAAABAR+ghgEAAAAAABYAFCKactNKZFvTSWu79Qu7gckGP0+UIgICyBe7dSGvw16pbzv7Jw5utQ3f+lVgYnuWH+wA8pllCL9HMEQCIAkHemqmSsFK56GqT+aMAqziBsnqxyNJBhrnYDkAuSJuAiBvFDKlePjjMK8LkAJWdGvJ9OUqoujMeQKdyOdqPClLBgEBAwQBAAAAIgYCyBe7dSGvw16pbzv7Jw5utQ3f+lVgYnuWH+wA8pllCL8IAAAAgAAAAAABEAT+////Ih0Cekh/wZ+3aYd7h0LW6hgRjzxOcrHqjG3mAqetSkHb4GghA+yk/xG3KOLg9gzmIilDpv9VudlfYnv5qZ0IS8hy1QpbIh4Cekh/wZ+3aYd7h0LW6hgRjzxOcrHqjG3mAqetSkHb4GhAihOzmFVF9yvW6JcUrrkJs+NUqEKpu4tWzQ7e0h34oZlZizEiikngvX6VzhBT98WyistUOmhwdgDjzomCLuMgIQABAwgYcwEAAAAAAAEEIlEgfCTD+UpVH5TLj1wOA8yaFwh/sU1xSl0vTp/Ux4nT02YBCgQBAAAAAA==",
+      "psbt": "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",
       "supplementary": {}
     },
     {
@@ -876,7 +876,7 @@
     },
     {
       "description": "can finalize: one P2WPKH input / two mixed outputs - labeled sp output and BIP 32 change",
-      "psbt": "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",
+      "psbt": "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",
       "supplementary": {
         "inputs": [
           {
@@ -906,7 +906,7 @@
             "amount": 100000,
             "sp_v0_info": "027a487fc19fb769877b8742d6ea18118f3c4e72b1ea8c6de602a7ad4a41dbe0680361e1b1e9de5e42cb2007f7ca54b9e0d57ed13938fad56d3f19e57513a8fce039",
             "sp_v0_label": 1,
-            "script": "51207c24c3f94a551f94cb8f5c0e03cc9a17087fb14d714a5d2f4e9fd4c789d3d366"
+            "script": "51202268cf529959f30ac8f7a5471ca4c67536a51f0e5b168af03eed4715edcc72e0"
           },
           {
             "output_index": 1,
@@ -967,7 +967,7 @@
     },
     {
       "description": "can finalize: two sp outputs - output 0 uses label=3 / output 1 uses label=1",
-      "psbt": "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",
+      "psbt": "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",
       "supplementary": {
         "inputs": [
           {
@@ -997,14 +997,14 @@
             "amount": 100000,
             "sp_v0_info": "028b790e0987fde9f0d12398eb6be30c7376793c647865a2a02f2efc960d96656803b44347335c63f505e55e268ab280f318b4a6aa14492ff379c3668a1f54ef8c9b",
             "sp_v0_label": 3,
-            "script": "51208e4155859dfba87dee5427787920c6958b916d7ac73f4da50b2ceb4c09f0618f"
+            "script": "5120caf732f41e7551909c94a335d1578ea7b766027b886cdd1c1701d9bfc6b78488"
           },
           {
             "output_index": 1,
             "amount": 190000,
             "sp_v0_info": "028b790e0987fde9f0d12398eb6be30c7376793c647865a2a02f2efc960d96656803b44347335c63f505e55e268ab280f318b4a6aa14492ff379c3668a1f54ef8c9b",
             "sp_v0_label": 1,
-            "script": "5120e3e6fc07ecf6bf6b59b4b9b6aa531335d6568a78be808d454e020d7e8c7fda53"
+            "script": "51204d07a0d3b0f61a7c5efe36c2c3c587c8b698418546008cf819bbda4ce3181221"
           }
         ]
       }