Add SHA256Uint256 helper functions

1 files changed, 7 insertions, 0 deletions

diff --git a/src/hash.cpp b/src/hash.cpp
index 4c09f5f646..83b90ae063 100644
--- a/src/hash.cpp
+++ b/src/hash.cpp
@@ -77,3 +77,10 @@ void BIP32Hash(const ChainCode &chainCode, unsigned int nChild, unsigned char he
     num[3] = (nChild >>  0) & 0xFF;
     CHMAC_SHA512(chainCode.begin(), chainCode.size()).Write(&header, 1).Write(data, 32).Write(num, 4).Finalize(output);
 }
+
+uint256 SHA256Uint256(const uint256& input)
+{
+    uint256 result;
+    CSHA256().Write(input.begin(), 32).Finalize(result.begin());
+    return result;
+}