// Copyright (c) 2010 Satoshi Nakamoto
// Copyright (c) 2009-2014 The Bitcoin Core developers
// Copyright (c) 2014-2017 The Dash Core developers
// Copyright (c) 2017-2017 The Pura Core developers
// Copyright (c) 2018 Nicolas Choukroun
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.

//Mining algorithm

const arith_uint256 maxUint = UintToArith256(
        uint256S("ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"));

static void MineGenesis(CBlockHeader &genesisBlock, const uint256 &powLimit, bool noProduction) {
    if (noProduction) genesisBlock.nTime = std::time(0);
    genesisBlock.nNonce = 0;

    printf("NOTE: Genesis nTime = %u \n", genesisBlock.nTime);
    printf("WARN: Genesis nNonce (BLANK!) = %u \n", genesisBlock.nNonce);

    arith_uint256 besthash;
    memset(&besthash, 0xFF, 32);
    arith_uint256 hashTarget = UintToArith256(powLimit);
    printf("Target: %s\n", hashTarget.GetHex().c_str());
    arith_uint256 newhash = UintToArith256(genesisBlock.GetHash());
    while (newhash > hashTarget) {
        genesisBlock.nNonce++;
        if (genesisBlock.nNonce == 0) {
            printf("NONCE WRAPPED, incrementing time\n");
            ++genesisBlock.nTime;
        }
        // If nothing found after trying for a while, print status
        if ((genesisBlock.nNonce & 0xffff) == 0)
            printf("nonce %08X: hash = %s \r",
                   genesisBlock.nNonce, newhash.ToString().c_str(),
                   hashTarget.ToString().c_str());

        if (newhash < besthash) {
            besthash = newhash;
            printf("New best: %s\n", newhash.GetHex().c_str());
        }
        newhash = UintToArith256(genesisBlock.GetHash());
    }
    printf("\nGenesis nTime = %u \n", genesisBlock.nTime);
    printf("Genesis nNonce = %u \n", genesisBlock.nNonce);
    printf("Genesis nBits: %08x\n", genesisBlock.nBits);
    printf("Genesis Hash = %s\n", newhash.ToString().c_str());
    printf("Genesis Hash Merkle Root = %s\n", genesisBlock.hashMerkleRoot.ToString().c_str());
    printf("Genesis Hash Merkle Root = %s\n", genesisBlock.hashMerkleRoot.ToString().c_str());
}