From 2c54217f913967703b404747133be67cf2f4feac Mon Sep 17 00:00:00 2001
From: Ben Woosley <ben.woosley@gmail.com>
Date: Wed, 15 Jan 2020 13:40:14 -0800
Subject: [PATCH] Use explicit conversion from PKHash -> CKeyID

These types are equivalent, in data etc, so they need only their
data cast across.

Note a function is used rather than a casting
operator as CKeyID is defined at a lower level than script/standard
---
 src/qt/coincontroldialog.cpp   | 2 +-
 src/script/signingprovider.cpp | 2 +-
 src/script/standard.cpp        | 5 +++++
 src/script/standard.h          | 1 +
 src/wallet/rpcwallet.cpp       | 2 +-
 src/wallet/scriptpubkeyman.cpp | 6 ++----
 6 files changed, 11 insertions(+), 7 deletions(-)

diff --git a/src/qt/coincontroldialog.cpp b/src/qt/coincontroldialog.cpp
index f44a9f285ae10..7c72858501c59 100644
--- a/src/qt/coincontroldialog.cpp
+++ b/src/qt/coincontroldialog.cpp
@@ -456,7 +456,7 @@ void CoinControlDialog::updateLabels(CCoinControl& m_coin_control, WalletModel *
         {
             CPubKey pubkey;
             PKHash *pkhash = boost::get<PKHash>(&address);
-            if (pkhash && model->wallet().getPubKey(out.txout.scriptPubKey, CKeyID(*pkhash), pubkey))
+            if (pkhash && model->wallet().getPubKey(out.txout.scriptPubKey, ToKeyID(*pkhash), pubkey))
             {
                 nBytesInputs += (pubkey.IsCompressed() ? 148 : 180);
             }
diff --git a/src/script/signingprovider.cpp b/src/script/signingprovider.cpp
index 01757e2f65537..a4eb0a83995d1 100644
--- a/src/script/signingprovider.cpp
+++ b/src/script/signingprovider.cpp
@@ -180,7 +180,7 @@ CKeyID GetKeyForDestination(const SigningProvider& store, const CTxDestination&
     // Only supports destinations which map to single public keys, i.e. P2PKH,
     // P2WPKH, and P2SH-P2WPKH.
     if (auto id = boost::get<PKHash>(&dest)) {
-        return CKeyID(*id);
+        return ToKeyID(*id);
     }
     if (auto witness_id = boost::get<WitnessV0KeyHash>(&dest)) {
         return CKeyID(*witness_id);
diff --git a/src/script/standard.cpp b/src/script/standard.cpp
index 3e0a9e2304d50..4b408d82e3c7a 100644
--- a/src/script/standard.cpp
+++ b/src/script/standard.cpp
@@ -23,6 +23,11 @@ ScriptHash::ScriptHash(const CScript& in) : uint160(Hash160(in.begin(), in.end()
 PKHash::PKHash(const CPubKey& pubkey) : uint160(pubkey.GetID()) {}
 WitnessV0KeyHash::WitnessV0KeyHash(const CPubKey& pubkey) : uint160(pubkey.GetID()) {}
 
+CKeyID ToKeyID(const PKHash& key_hash)
+{
+    return CKeyID{static_cast<uint160>(key_hash)};
+}
+
 WitnessV0ScriptHash::WitnessV0ScriptHash(const CScript& in)
 {
     CSHA256().Write(in.data(), in.size()).Finalize(begin());
diff --git a/src/script/standard.h b/src/script/standard.h
index 382d8d002b5c2..1c630744beafa 100644
--- a/src/script/standard.h
+++ b/src/script/standard.h
@@ -79,6 +79,7 @@ struct PKHash : public uint160
     explicit PKHash(const uint160& hash) : uint160(hash) {}
     explicit PKHash(const CPubKey& pubkey);
 };
+CKeyID ToKeyID(const PKHash& key_hash);
 
 struct WitnessV0KeyHash;
 struct ScriptHash : public uint160
diff --git a/src/wallet/rpcwallet.cpp b/src/wallet/rpcwallet.cpp
index c3a64cf46aaa6..43c1aa1a7d437 100644
--- a/src/wallet/rpcwallet.cpp
+++ b/src/wallet/rpcwallet.cpp
@@ -3517,7 +3517,7 @@ class DescribeWalletAddressVisitor : public boost::static_visitor<UniValue>
 
     UniValue operator()(const PKHash& pkhash) const
     {
-        CKeyID keyID(pkhash);
+        CKeyID keyID{ToKeyID(pkhash)};
         UniValue obj(UniValue::VOBJ);
         CPubKey vchPubKey;
         if (provider && provider->GetPubKey(keyID, vchPubKey)) {
diff --git a/src/wallet/scriptpubkeyman.cpp b/src/wallet/scriptpubkeyman.cpp
index 8a2a79864417c..6ec34951ecf70 100644
--- a/src/wallet/scriptpubkeyman.cpp
+++ b/src/wallet/scriptpubkeyman.cpp
@@ -573,9 +573,8 @@ bool LegacyScriptPubKeyMan::SignTransaction(CMutableTransaction& tx, const std::
 
 SigningResult LegacyScriptPubKeyMan::SignMessage(const std::string& message, const PKHash& pkhash, std::string& str_sig) const
 {
-    CKeyID key_id(pkhash);
     CKey key;
-    if (!GetKey(key_id, key)) {
+    if (!GetKey(ToKeyID(pkhash), key)) {
         return SigningResult::PRIVATE_KEY_NOT_AVAILABLE;
     }
 
@@ -2052,9 +2051,8 @@ SigningResult DescriptorScriptPubKeyMan::SignMessage(const std::string& message,
         return SigningResult::PRIVATE_KEY_NOT_AVAILABLE;
     }
 
-    CKeyID key_id(pkhash);
     CKey key;
-    if (!keys->GetKey(key_id, key)) {
+    if (!keys->GetKey(ToKeyID(pkhash), key)) {
         return SigningResult::PRIVATE_KEY_NOT_AVAILABLE;
     }