From 1a7afed0686582a684dd4280f5d0400580f5fb2a Mon Sep 17 00:00:00 2001
From: Riccardo Casatta <riccardo@casatta.it>
Date: Fri, 16 Jul 2021 10:51:11 +0200
Subject: [PATCH] Add Reserved variant to SigHashType for future use (ie
 SIGHASH_ANYPREVOUT)

---
 src/util/sighash.rs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/util/sighash.rs b/src/util/sighash.rs
index 0b85d7d1..d049e37d 100644
--- a/src/util/sighash.rs
+++ b/src/util/sighash.rs
@@ -113,6 +113,9 @@ pub enum SigHashType {
     NonePlusAnyoneCanPay = 0x82,
     /// 0x83: Sign one output and only this input (see `Single` for what "one output" means)
     SinglePlusAnyoneCanPay = 0x83,
+
+    /// Reserved for future use
+    Reserved = 0xFF,
 }
 
 /// Possible errors in computing the signature message
@@ -225,6 +228,7 @@ impl SigHashType {
             SigHashType::AllPlusAnyoneCanPay => (SigHashType::All, true),
             SigHashType::NonePlusAnyoneCanPay => (SigHashType::None, true),
             SigHashType::SinglePlusAnyoneCanPay => (SigHashType::Single, true),
+            SigHashType::Reserved => (SigHashType::Reserved, false),
         }
     }
 }