// Copyright (c) 2009-2010 Satoshi Nakamoto

// Copyright (c) 2009-2015 The Bitcoin Core developers

// Distributed under the MIT software license, see the accompanying

// file COPYING or http://www.opensource.org/licenses/mit-license.php.

#include <primitives/block.h>

#include <hash.h>

#include <tinyformat.h>

#include <utilstrencodings.h>

#include <crypto/common.h>

#include <hashblock.h>

uint256 CBlockHeader::GetHash() const

{

if (nVersion > 6)

return SerializeHash(*this);

else

return GetPoWHash();

}

uint256 CBlockHeader::GetPoWHash() const

{

return Hash9(BEGIN(nVersion), END(nNonce));

}

std::string CBlock::ToString() const

{

std::stringstream s;

s << strprintf("CBlock(hash=%s, ver=0x%08x, hashPrevBlock=%s, hashMerkleRoot=%s, nTime=%u, nBits=%08x, nNonce=%u, vtx=%u, vchBlockSig=%s)\n",

GetHash().ToString(),

nVersion,

hashPrevBlock.ToString(),

hashMerkleRoot.ToString(),

nTime, nBits, nNonce,

vtx.size(),

HexStr(vchBlockSig.begin(), vchBlockSig.end()));

for (unsigned int i = 0; i < vtx.size(); i++)

{

s << " " << vtx[i].ToString() << "\n";

}

s << " vMerkleTree: ";

for (unsigned int i = 0; i < vMerkleTree.size(); i++)

s << " " << vMerkleTree[i].ToString();

s << "\n";

return s.str();

}

std::string CBlockHeader::ToString() const

{

std::stringstream s;

s << strprintf("CBlockHeader(hash=%s, ver=0x%08x, hashPrevBlock=%s, hashMerkleRoot=%s, nTime=%u, nBits=%08x, nNonce=%u)\n",

GetHash().ToString(),

nVersion,

hashPrevBlock.ToString(),

hashMerkleRoot.ToString(),

nTime, nBits, nNonce);

return s.str();

}

int64_t GetBlockWeight(const CBlock& block)

{

// This implements the weight = (stripped_size * 4) + witness_size formula,

// using only serialization with and without witness data. As witness_size

// is equal to total_size - stripped_size, this formula is identical to:

// weight = (stripped_size * 3) + total_size.

return ::GetSerializeSize(block, SER_NETWORK, PROTOCOL_VERSION | SERIALIZE_TRANSACTION_NO_WITNESS) * (WITNESS_SCALE_FACTOR - 1) + ::GetSerializeSize(block, SER_NETWORK, PROTOCOL_VERSION);

}