NobleCoin[NOBL] - 8% PoS | 1Yr+ | MARKETPLACE | PAY | GIFT | CHARITIES/MERCHANTS

[xploited]

Regarding the difficulty, we were always under the impression that this line in the main.cpp handled the re-target (making it every 30 minutes or blocks). We've also been told in the early stages it's more complicated than that and will fluctuate until hash-rates rise and settle. Can anyone with more technical experience of this please share with us your experience/knowledge. Thanks.

LINE 836 static const int64 nTargetTimespan = 30 * 60;                    // 30 x 60 seconds (30 blocks)

From my understanding that just defines how long you would like the average target time span to be. Difficulty retargeting is taken care of slightly below that, it should be around like 920 in the main.cpp file but I'm not looking at the code for noblecoin specifically so I dobt that is exact.

Look for the function

Code:

unsigned int static GetNextWorkRequired(const CBlockIndex* pindexLast, const CBlock *pblock)

that is where the difficulty re targeting is handled.

[icecube45]

I'd like to thank hearnomore of valid-error.
He has helped me optimize my pool,
we are now finding more blocks, faster
noblepool.zapto.org

care to share the details of what he did? =)

If the pool owners hop on over to irc, we'll happily tell you (tiny bit of blackmail)

It also fixed the net hash error

[Rofo]

Thanks xploited. We're still comparing our code to others with a similar re-target and don't see any difference that would prevent us from settling on our initial 30 block re-target. I'm thinking it takes some time to settle considering the (slight) complexity of the code actually handling the re-target you pointed out. Correct me if I'm wrong though? Thank you.

[xploited]

Thanks xploited. We're still comparing our code to others with a similar re-target and don't see any difference that would prevent us from settling on our initial 30 block re-target. I'm thinking it takes some time to settle considering the (slight) complexity of the code actually handling the re-target you pointed out. Correct me if I'm wrong though? Thank you.

I just took a look tat the noblecoin codebase and its  the same as the earthcoin code in that function.

As its currently wrote retargets will happen every block, like earthcoin does.   That code is missing the section that tells it to limit the retargets to a certain interval.

An example of the code from the litecoin client is

Code:

// Only change once per interval
    if ((pindexLast->nHeight+1) % nInterval != 0)
    {
        // Special difficulty rule for testnet:
        if (fTestNet)
        {
            // If the new block's timestamp is more than 2* 10 minutes
            // then allow mining of a min-difficulty block.
            if (pblock->nTime > pindexLast->nTime + nTargetSpacing*2)
                return nProofOfWorkLimit;
            else
            {
                // Return the last non-special-min-difficulty-rules-block
                const CBlockIndex* pindex = pindexLast;
                while (pindex->pprev && pindex->nHeight % nInterval != 0 && pindex->nBits == nProofOfWorkLimit)
                    pindex = pindex->pprev;
                return pindex->nBits;
            }
        }

        return pindexLast->nBits;
    }

[Rofo]

I see now xploited, thanks very much for pointing out the issue. I'm grateful for the help but slightly disappointed we didn't see the differences in code between Litecoin and our original source. It seems a lot of other alt-coins at the moment are missing this piece in main.cpp and adjusting per block (including EAC?). However, we don't want a short difficulty re-target causing us any problems long-term. I think we can always (and will because we would like to ultimately fix this) update in the future. What do you think?

[ctenc001]

I'd like to thank hearnomore of valid-error.
He has helped me optimize my pool,
we are now finding more blocks, faster
noblepool.zapto.org

care to share the details of what he did? =)

If the pool owners hop on over to irc, we'll happily tell you (tiny bit of blackmail)

It also fixed the net hash error

I'll have to get with you in the morning if you can't PM it; I am away from a computer =/

[icecube45]

I'd like to thank hearnomore of valid-error.
He has helped me optimize my pool,
we are now finding more blocks, faster
noblepool.zapto.org

care to share the details of what he did? =)

If the pool owners hop on over to irc, we'll happily tell you (tiny bit of blackmail)

It also fixed the net hash error

I'll have to get with you in the morning if you can't PM it; I am away from a computer =/

That was just some bribery to get some pool owners on irc, haha

I'll send it over now, just promise to visit us some time

[Rofo]

Looks like the config. changes and community movement have spread things around - now it's time to grow back to our pre-Coinye hashrate!

[blackman330]

9ib3kPbQGQwPK9XWGYLg4wekW1zLygrm5g

thanks

[Rofo]

Bounties have been updated. We know it's hard having no 'official' exchange price *yet* - but we're hoping this helps further involve those who want to get on-board (including those who aren't primarily miners). Nothing is too big or small. If you already accept many alt-coins and feel like there is potential in NobleCoin and would consider adding it, give me a shout. Cheers.

[Rocou]

Hi,

Where can I find a Mac OSX Wallet?

[Rofo]

Hi Rocou (sorry!), we've had a couple look at one (we are unable to build one here) but I can push now immediately to get that prioritised. If anyone who has been with us early can share with us on Mega a VirusTotal clean wallet (for what it's worth) I will send through a bounty deemed fair your way. Rocou I'll also hook you up in the meantime to make up for the lost time since we haven't got one sorted yet. Hope that helps, cheers.

[Rubberduckie]

The giveaway is still open if you haven't already posted there:

https://bitcointalk.org/index.php?topic=409488.new#new

[Amph]

bump

[icecube45]

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[Rofo]

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[icecube45]

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[TheTribesman]

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[icecube45]

Oh dear.

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[NorrisK]

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