mirror of
https://github.com/kvazar-network/kevacoin.git
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68 lines
2.1 KiB
C++
68 lines
2.1 KiB
C++
// Copyright (c) 2009-2010 Satoshi Nakamoto
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// Copyright (c) 2009-2017 The Bitcoin Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#include <primitives/block.h>
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#include <hash.h>
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#include <tinyformat.h>
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#include <utilstrencodings.h>
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#include <crypto/common.h>
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//#include <crypto/scrypt.h>
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extern "C"
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{
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#include <cryptonight/hash-ops.h>
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}
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uint256 CBlockHeader::GetHash() const
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{
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return SerializeHash(*this);
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}
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uint256 CBlockHeader::GetPoWHash() const
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{
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uint256 thash;
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// Convert it to Cryptonight header format.
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uint8_t cnHeader[76] = {};
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// Bitcoin header size is 80 bytes, while CN is 76 bytes.
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// To reduce it to 76, combine nVersion(4 bytes) and hashPrevBlock(32 byte)
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// into 32 byte SHA2 hash.
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uint8_t combineHash[32] = {};
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CSHA256().Write((uint8_t*)BEGIN(nVersion), 36).Finalize(combineHash);
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memcpy(cnHeader, combineHash, sizeof(combineHash));
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uint32_t offset = sizeof(combineHash);
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// Copy 7 bytes of hashMerkleRoot
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memcpy(cnHeader + offset, BEGIN(nVersion) + 36, 7);
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offset += 7;
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// Copy nonce.
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assert(offset == 39);
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memcpy(cnHeader + offset, BEGIN(nVersion) + 76, 4);
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offset += 4;
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// Copy the rest of hashMerkleRoot (25 bytes)
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memcpy(cnHeader + offset, BEGIN(nVersion) + 36 + 7, 25);
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offset += 25;
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assert(offset == 68);
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// Copy the rest of the header (timestamp and bits).
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memcpy(cnHeader + offset, BEGIN(nVersion) + 68, 8);
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// Compute the CN hash.
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cn_slow_hash(cnHeader, sizeof(cnHeader), BEGIN(thash), 2, 0);
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return thash;
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}
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std::string CBlock::ToString() const
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{
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std::stringstream s;
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s << strprintf("CBlock(hash=%s, ver=0x%08x, hashPrevBlock=%s, hashMerkleRoot=%s, nTime=%u, nBits=%08x, nNonce=%u, vtx=%u)\n",
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GetHash().ToString(),
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nVersion,
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hashPrevBlock.ToString(),
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hashMerkleRoot.ToString(),
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nTime, nBits, nNonce,
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vtx.size());
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for (const auto& tx : vtx) {
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s << " " << tx->ToString() << "\n";
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}
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return s.str();
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}
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