From 985c79552ceb6a5f5812d421dc5c86fa3b1cc41d Mon Sep 17 00:00:00 2001
From: Pieter Wuille <pieter.wuille@gmail.com>
Date: Thu, 30 Nov 2017 16:48:38 -0800
Subject: Improve witness destination types and use them more

---
 src/script/standard.h | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

(limited to 'src/script/standard.h')

diff --git a/src/script/standard.h b/src/script/standard.h
index 3eeeabdc15..b1c314fa72 100644
--- a/src/script/standard.h
+++ b/src/script/standard.h
@@ -73,8 +73,19 @@ public:
     friend bool operator<(const CNoDestination &a, const CNoDestination &b) { return true; }
 };
 
-struct WitnessV0ScriptHash : public uint256 {};
-struct WitnessV0KeyHash : public uint160 {};
+struct WitnessV0ScriptHash : public uint256
+{
+    WitnessV0ScriptHash() : uint256() {}
+    explicit WitnessV0ScriptHash(const uint256& hash) : uint256(hash) {}
+    using uint256::uint256;
+};
+
+struct WitnessV0KeyHash : public uint160
+{
+    WitnessV0KeyHash() : uint160() {}
+    explicit WitnessV0KeyHash(const uint160& hash) : uint160(hash) {}
+    using uint160::uint160;
+};
 
 //! CTxDestination subtype to encode any future Witness version
 struct WitnessUnknown
@@ -164,6 +175,9 @@ CScript GetScriptForMultisig(int nRequired, const std::vector<CPubKey>& keys);
  * Generate a pay-to-witness script for the given redeem script. If the redeem
  * script is P2PK or P2PKH, this returns a P2WPKH script, otherwise it returns a
  * P2WSH script.
+ *
+ * TODO: replace calls to GetScriptForWitness with GetScriptForDestination using
+ * the various witness-specific CTxDestination subtypes.
  */
 CScript GetScriptForWitness(const CScript& redeemscript);
 
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