From 3cc71d7c22e941987e1c79cae64f08d989a1e62b Mon Sep 17 00:00:00 2001
From: Ava Chow <github@achow101.com>
Date: Tue, 1 Jul 2025 14:28:30 -0700
Subject: [PATCH] 380: Disallow H as a hardened indicator

---
 bip-0380.mediawiki | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/bip-0380.mediawiki b/bip-0380.mediawiki
index 9f5e6f53..0c19cb30 100644
--- a/bip-0380.mediawiki
+++ b/bip-0380.mediawiki
@@ -88,7 +88,7 @@ When the final step is <tt>/*</tt> or <tt>/*'</tt>, an output script will be pro
 The derived key must be not be serialized as an uncompressed public key.
 Script Expressions may have further requirements on how derived public keys are serialized for script creation.
 
-In the above specification, the hardened indicator <tt>h</tt> may be replaced with alternative hardened indicators of <tt>H</tt> or <tt>'</tt>.
+In the above specification, the hardened indicator <tt>h</tt> may be replaced with alternative hardened indicator of <tt>'</tt>.
 
 ====Normalization of Key Expressions with Hardened Derivation====
 
@@ -220,9 +220,7 @@ Valid expressions:
 * Uncompressed public key: <tt>04a34b99f22c790c4e36b2b3c2c35a36db06226e41c692fc82b8b56ac1c540c5bd5b8dec5235a0fa8722476c7709c02559e3aa73aa03918ba2d492eea75abea235</tt>
 * Public key with key origin: <tt>[deadbeef/0h/0h/0h]0260b2003c386519fc9eadf2b5cf124dd8eea4c4e68d5e154050a9346ea98ce600</tt>
 * Public key with key origin (<tt>'</tt> as hardened indicator): <tt>[deadbeef/0'/0'/0']0260b2003c386519fc9eadf2b5cf124dd8eea4c4e68d5e154050a9346ea98ce600</tt>
-* Public key with key origin (<tt>H</tt> as hardened indicator): <tt>[deadbeef/0H/0H/0H]0260b2003c386519fc9eadf2b5cf124dd8eea4c4e68d5e154050a9346ea98ce600</tt>
 * Public key with key origin (mixed hardened indicator): <tt>[deadbeef/0'/0h/0']0260b2003c386519fc9eadf2b5cf124dd8eea4c4e68d5e154050a9346ea98ce600</tt>
-* Public key with key origin (mixed hardened indicator): <tt>[deadbeef/0'/0h/0H]0260b2003c386519fc9eadf2b5cf124dd8eea4c4e68d5e154050a9346ea98ce600</tt>
 * WIF uncompressed private key <tt>5KYZdUEo39z3FPrtuX2QbbwGnNP5zTd7yyr2SC1j299sBCnWjss</tt>
 * WIF compressed private key <tt>L4rK1yDtCWekvXuE6oXD9jCYfFNV2cWRpVuPLBcCU2z8TrisoyY1</tt>
 * Extended public key: <tt>xpub6ERApfZwUNrhLCkDtcHTcxd75RbzS1ed54G1LkBUHQVHQKqhMkhgbmJbZRkrgZw4koxb5JaHWkY4ALHY2grBGRjaDMzQLcgJvLJuZZvRcEL</tt>
@@ -248,6 +246,8 @@ Invalid expression:
 * Too long fingerprint: <tt>[deadbeeef/0h/0h/0h]0260b2003c386519fc9eadf2b5cf124dd8eea4c4e68d5e154050a9346ea98ce600</tt>
 * Invalid hardened indicators: <tt>[deadbeef/0f/0f/0f]0260b2003c386519fc9eadf2b5cf124dd8eea4c4e68d5e154050a9346ea98ce600</tt>
 * Invalid hardened indicators: <tt>[deadbeef/-0/-0/-0]0260b2003c386519fc9eadf2b5cf124dd8eea4c4e68d5e154050a9346ea98ce600</tt>
+* Invalid hardened indicators: <tt>[deadbeef/0H/0H/0H]0260b2003c386519fc9eadf2b5cf124dd8eea4c4e68d5e154050a9346ea98ce600</tt>
+* Invalid hardened indicators: <tt>[deadbeef/0h/1h/2]xprvA1RpRA33e1JQ7ifknakTFpgNXPmW2YvmhqLQYMmrj4xJXXWYpDPS3xz7iAxn8L39njGVyuoseXzU6rcxFLJ8HFsTjSyQbLYnMpCqE2VbFWc/3H/4h/5h/*H</tt>
 * Private key with derivation: <tt>L4rK1yDtCWekvXuE6oXD9jCYfFNV2cWRpVuPLBcCU2z8TrisoyY1/0</tt>
 * Private key with derivation children: <tt>L4rK1yDtCWekvXuE6oXD9jCYfFNV2cWRpVuPLBcCU2z8TrisoyY1/*</tt>
 * Derivation index out of range: <tt>xprv9s21ZrQH143K31xYSDQpPDxsXRTUcvj2iNHm5NUtrGiGG5e2DtALGdso3pGz6ssrdK4PFmM8NSpSBHNqPqm55Qn3LqFtT2emdEXVYsCzC2U/2147483648</tt>