diff options
Diffstat (limited to 'src/hash.h')
| -rw-r--r-- | src/hash.h | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/src/hash.h b/src/hash.h index c16bbb48ce..1456a899d8 100644 --- a/src/hash.h +++ b/src/hash.h @@ -1,5 +1,5 @@ // Copyright (c) 2009-2010 Satoshi Nakamoto -// Copyright (c) 2009-2018 The Bitcoin Core developers +// Copyright (c) 2009-2020 The Bitcoin Core developers // Distributed under the MIT software license, see the accompanying // file COPYING or http://www.opensource.org/licenses/mit-license.php. @@ -15,6 +15,7 @@ #include <uint256.h> #include <version.h> +#include <string> #include <vector> typedef uint256 ChainCode; @@ -196,10 +197,18 @@ uint256 SerializeHash(const T& obj, int nType=SER_GETHASH, int nVersion=PROTOCOL } /** Single-SHA256 a 32-byte input (represented as uint256). */ -NODISCARD uint256 SHA256Uint256(const uint256& input); +[[nodiscard]] uint256 SHA256Uint256(const uint256& input); unsigned int MurmurHash3(unsigned int nHashSeed, Span<const unsigned char> vDataToHash); void BIP32Hash(const ChainCode &chainCode, unsigned int nChild, unsigned char header, const unsigned char data[32], unsigned char output[64]); +/** Return a CHashWriter primed for tagged hashes (as specified in BIP 340). + * + * The returned object will have SHA256(tag) written to it twice (= 64 bytes). + * A tagged hash can be computed by feeding the message into this object, and + * then calling CHashWriter::GetSHA256(). + */ +CHashWriter TaggedHash(const std::string& tag); + #endif // BITCOIN_HASH_H |