int64_t GetBlockValue(int nHeight, int64_t nFees)
{
    int64_t nSubsidy = 0;
    int tHeight = 5256000; // reduction frequency: 3600 * 365 * 4

    // different zero block period for testnet and mainnet
    // mainnet not fixed until final release
    int zeroRewardHeight = Params.AllowMinDifficultyBlocks() ? 2001 : 7001;

    int rampHeight = 43200 + zeroRewardHeight; // 4 periods of 10800

    if (nHeight == 0) {
        // no reward for genesis block
        nSubsidy = 0;
    } else if (nHeight == 1) {
        // first distribution
        nSubsidy = 10000000 * COIN;
    } else if (nHeight <= zeroRewardHeight) {
        // no block reward to allow difficulty to scale up and prevent instamining
        nSubsidy = 0;
    } else if (nHeight <= (zeroRewardHeight + 10800)) {
        // first 10800 block after zero reward period is 10 coins per block
        nSubsidy = 10 * COIN;
    } else if (nHeight <= rampHeight) {
        // every 10800 blocks reduce nSubsidy from 8 to 6
        nSubsidy = (8 - int((nHeight-zeroRewardHeight-1) / 10800)) * COIN;
    } else if (nHeight <= tHeight) {
        // first 4 years
        nSubsidy = 5 * COIN;
    } else if (nHeight <= (2 * tHeight)) {
        // next 4 years
        nSubsidy = 4 * COIN;
    } else if (nHeight <= (3 * tHeight)) {
        // next 4 years
        nSubsidy = 3 * COIN;
    } else if (nHeight <= (4 * tHeight)) {
        // next 4 years
        nSubsidy = 2 * COIN;
    } else if (nHeight <= (5 * tHeight)) {
        // next 4 years
        nSubsidy = 1 * COIN;
    } else if (nHeight <= (6 * tHeight)) {
        // next 4 years
        nSubsidy = 0.5 * COIN;
    }

    return nSubsidy + nFees;
}