From dd3c07acce7ab67f32a79393abf6227009bd440d Mon Sep 17 00:00:00 2001
From: Andrew Chow <achow101-github@achow101.com>
Date: Thu, 12 Apr 2018 17:04:49 -0400
Subject: [PATCH] Separate HaveKey function that checks whether a key is in a
 keystore

---
 src/keystore.cpp | 7 +++++++
 src/keystore.h   | 3 +++
 2 files changed, 10 insertions(+)

diff --git a/src/keystore.cpp b/src/keystore.cpp
index e69d518890f..ea93ed69fa9 100644
--- a/src/keystore.cpp
+++ b/src/keystore.cpp
@@ -195,3 +195,10 @@ CKeyID GetKeyForDestination(const CKeyStore& store, const CTxDestination& dest)
     }
     return CKeyID();
 }
+
+bool HaveKey(const CKeyStore& store, const CKey& key)
+{
+    CKey key2;
+    key2.Set(key.begin(), key.end(), !key.IsCompressed());
+    return store.HaveKey(key.GetPubKey().GetID()) || store.HaveKey(key2.GetPubKey().GetID());
+}
diff --git a/src/keystore.h b/src/keystore.h
index c56e4751de8..cd5ded92038 100644
--- a/src/keystore.h
+++ b/src/keystore.h
@@ -80,4 +80,7 @@ typedef std::map<CKeyID, std::pair<CPubKey, std::vector<unsigned char> > > Crypt
 /** Return the CKeyID of the key involved in a script (if there is a unique one). */
 CKeyID GetKeyForDestination(const CKeyStore& store, const CTxDestination& dest);
 
+/** Checks if a CKey is in the given CKeyStore compressed or otherwise*/
+bool HaveKey(const CKeyStore& store, const CKey& key);
+
 #endif // BITCOIN_KEYSTORE_H