From bf2e010973e94c8ca2800c434cceb8bdb767f71c Mon Sep 17 00:00:00 2001
From: Karl-Johan Alm <karljohan-alm@garage.co.jp>
Date: Thu, 17 May 2018 14:50:15 +0900
Subject: uint256: Remove unnecessary crypto/common.h use

---
 src/hash.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'src/hash.h')

diff --git a/src/hash.h b/src/hash.h
index 3534a400b3..1645eceb03 100644
--- a/src/hash.h
+++ b/src/hash.h
@@ -6,6 +6,7 @@
 #ifndef BITCOIN_HASH_H
 #define BITCOIN_HASH_H
 
+#include <crypto/common.h>
 #include <crypto/ripemd160.h>
 #include <crypto/sha256.h>
 #include <prevector.h>
@@ -138,6 +139,15 @@ public:
         return result;
     }
 
+    /**
+     * Returns the first 64 bits from the resulting hash.
+     */
+    inline uint64_t GetCheapHash() {
+        unsigned char result[CHash256::OUTPUT_SIZE];
+        ctx.Finalize(result);
+        return ReadLE64(result);
+    }
+
     template<typename T>
     CHashWriter& operator<<(const T& obj) {
         // Serialize to this stream
-- 
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