Add generic SaltedSipHasher

SaltedSipHasher is a generic hasher that can be used with most things we
would hash in an unordered container.

2 files changed, 19 insertions, 0 deletions

diff --git a/src/util/hasher.cpp b/src/util/hasher.cpp
index 236b8e926f..5900daf050 100644
--- a/src/util/hasher.cpp
+++ b/src/util/hasher.cpp
@@ -10,3 +10,10 @@
 SaltedTxidHasher::SaltedTxidHasher() : k0(GetRand(std::numeric_limits<uint64_t>::max())), k1(GetRand(std::numeric_limits<uint64_t>::max())) {}
 
 SaltedOutpointHasher::SaltedOutpointHasher() : k0(GetRand(std::numeric_limits<uint64_t>::max())), k1(GetRand(std::numeric_limits<uint64_t>::max())) {}
+
+SaltedSipHasher::SaltedSipHasher() : m_k0(GetRand(std::numeric_limits<uint64_t>::max())), m_k1(GetRand(std::numeric_limits<uint64_t>::max())) {}
+
+size_t SaltedSipHasher::operator()(const Span<const unsigned char>& script) const
+{
+    return CSipHasher(m_k0, m_k1).Write(script.data(), script.size()).Finalize();
+}
diff --git a/src/util/hasher.h b/src/util/hasher.h
index 77301df63d..fa2fea30d8 100644
--- a/src/util/hasher.h
+++ b/src/util/hasher.h
@@ -84,4 +84,16 @@ struct BlockHasher
     size_t operator()(const uint256& hash) const { return ReadLE64(hash.begin()); }
 };
 
+class SaltedSipHasher
+{
+private:
+    /** Salt */
+    const uint64_t m_k0, m_k1;
+
+public:
+    SaltedSipHasher();
+
+    size_t operator()(const Span<const unsigned char>& script) const;
+};
+
 #endif // BITCOIN_UTIL_HASHER_H