Topic: [ANN][YAC] YACoin ongoing development - page 31. (Read 379983 times)

minerd-x64-avx.exe --starttime=1388361600 -a scrypt-chacha -o stratum+tcp://yacoin.club:3443 -O User.WorkerName:WorkerPassword

nSubsidy = 100 / (diff ^ 1/6)

int64 GetProofOfWorkReward(unsigned int nBits)
{
    CBigNum bnSubsidyLimit = MAX_MINT_PROOF_OF_WORK;
    CBigNum bnTarget;
    bnTarget.SetCompact(nBits);
    CBigNum bnTargetLimit = bnProofOfWorkLimit;
    bnTargetLimit.SetCompact(bnTargetLimit.GetCompact());

    // ppcoin: subsidy is cut in half every 64x multiply of difficulty
    // A reasonably continuous curve is used to avoid shock to market
    // (nSubsidyLimit / nSubsidy) ** 6 == bnProofOfWorkLimit / bnTarget
    //
    // Human readable form:
    //
    // nSubsidy = 100 / (diff ^ 1/6)
    CBigNum bnLowerBound = CENT;
    CBigNum bnUpperBound = bnSubsidyLimit;
    while (bnLowerBound + CENT <= bnUpperBound)
    {
        CBigNum bnMidValue = (bnLowerBound + bnUpperBound) / 2;
        if (fDebug && GetBoolArg("-printcreation"))
            printf("GetProofOfWorkReward() : lower=%"PRI64d" upper=%"PRI64d" mid=%"PRI64d"\n", bnLowerBound.getuint64(), bnUpperBound.getuint64(), bnMidValue.getuint64());
        if (bnMidValue * bnMidValue * bnMidValue * bnMidValue * bnMidValue * bnMidValue * bnTargetLimit > bnSubsidyLimit * bnSubsidyLimit * bnSubsidyLimit * bnSubsidyLimit * bnSubsidyLimit * bnSubsidyLimit * bnTarget)
            bnUpperBound = bnMidValue;
        else
            bnLowerBound = bnMidValue;
    }

    int64 nSubsidy = bnUpperBound.getuint64();
    nSubsidy = (nSubsidy / CENT) * CENT;
    if (fDebug && GetBoolArg("-printcreation"))
        printf("GetProofOfWorkReward() : create=%s nBits=0x%08x nSubsidy=%"PRI64d"\n", FormatMoney(nSubsidy).c_str(), nBits, nSubsidy);

    return min(nSubsidy, MAX_MINT_PROOF_OF_WORK);
}

int64 GetProofOfWorkReward(unsigned int nBits)
{
    CBigNum 
        bnSubsidyLimit = MAX_MINT_PROOF_OF_WORK;

    CBigNum 
        bnTarget;

    bnTarget.SetCompact(nBits);

    CBigNum 
        bnTargetLimit = bnProofOfWorkLimit;

    bnTargetLimit.SetCompact(bnTargetLimit.GetCompact());

    // ppcoin: subsidy is cut in half every 64x multiply of difficulty
    // 64 = 2 to the 6th power
    
    // A reasonably continuous curve is used to avoid shock to market
    // (nSubsidyLimit / nSubsidy) ** 6 == bnProofOfWorkLimit / bnTarget
    // what are these terms and how do they relate to the discussion, exactly??????
         
    //
    // Human readable form:
    //
    // nSubsidy = 100 / (diff ^ 1/6)

    // again, but worse!!!  Undefined magic numbers.  I think that 100 is the 
    // maximum subsidy in COINs ???????????
    // diff is ??????????????
    // 1/6 is 0 if we are talking integer divide, so obviously we are not?????????????
    // So what are we talking???????????????????
    // is ^ from GWBASIC??????????????
    // Do we mean power?????????????????

    // even so, after all of that, what does this code below actually do?????????

    CBigNum 
        bnLowerBound = CENT;            // this is 0.01 * COIN

    CBigNum 
        bnUpperBound = bnSubsidyLimit;  // seems that this is just 100* COIN

    while (bnLowerBound + CENT <= bnUpperBound)
    {
        CBigNum 
            bnMidValue = (bnLowerBound + bnUpperBound) / 2;

        if (fDebug && GetBoolArg("-printcreation"))
            printf(
                    "GetProofOfWorkReward() : lower=%"PRI64d" upper=%"PRI64d" mid=%"PRI64d"\n", 
                    bnLowerBound.getuint64(), 
                    bnUpperBound.getuint64(), 
                    bnMidValue.getuint64()
                  );
        if (
            bnMidValue * bnMidValue * bnMidValue * bnMidValue * bnMidValue * bnMidValue * 
            bnTargetLimit > 
            bnSubsidyLimit * bnSubsidyLimit * bnSubsidyLimit * bnSubsidyLimit * bnSubsidyLimit * bnSubsidyLimit * 
            bnTarget
           )
            bnUpperBound = bnMidValue;
        else
            bnLowerBound = bnMidValue;
    }

    int64 
        nSubsidy = bnUpperBound.getuint64();

    nSubsidy = (nSubsidy / CENT) * CENT;
    if (fDebug && GetBoolArg("-printcreation"))
        printf(
                "GetProofOfWorkReward() : create=%s nBits=0x%08x nSubsidy=%"PRI64d"\n", 
                FormatMoney(nSubsidy).c_str(), 
                nBits, 
                nSubsidy
              );

    return min(nSubsidy, MAX_MINT_PROOF_OF_WORK);
}