[ANN] [SKC] Skeincoin 0.9.3.1 | Skein-SHA2 - page 18.

AfrikaMan

member

Activity: 63

Merit: 10

Quote from: glamorgoblin on June 17, 2014, 02:08:26 AM

Nice. Thanks for the MiriadCoin tip. I have the hash algorithm blocks for a kein or Miriad FPGA miner, but I'm missing the little details like what the initial header fed to the hasher looks like, how the different hash ins/outs connect together (Skein is 512 bits and SHA-256D is 256 bits), if there's anything unique about the difficulty/target calculation, etc. Any advice on where to find these details? I've picked apart source code for other coins before for these details and would rather avoid that frustration if the details are available in a more user friendly form.

The headers should be the same as for Bitcoin. The Skein algo used by Skeincoin and Myriadcoin is actually SHA2(SKEIN512(Data)), in other words one round of SKEIN512, and then SHA2 on the SKEIN512 hash to get 256 bits:

Code:

    sph_skein512_init(&ctx_skein);
    sph_skein512(&ctx_skein, (pbegin == pend ? pblank : static_cast(&pbegin[0])), (pend - pbegin) * sizeof(pbegin[0]));
    sph_skein512_close(&ctx_skein, static_cast(&hash1));
    
    SHA256((unsigned char*)&hash1, 64, (unsigned char*)&hash2);

teknohog

sr. member

Activity: 519

Merit: 252

555

Quote from: glamorgoblin on June 16, 2014, 09:24:24 PM

Should I consider mining SkeinCoins? I can't tell if folks here would like this or not. It may swamp the network hashrate and frustrate CPU/GPU miners.

As one of the early Bitcoin FPGA devs, I say go for it! Cheesy

You won't swamp the network rate for a couple of reasons any time soon. FPGAs are generally slower than GPUs, and relatively expensive -- fewer people have them (think about the average gamer with a strong GPU, vs. the average electronics hobbyist with an FPGA).

It's only power efficiency where FPGAs win in the long run, and this requires wider adoption. In the case of Bitcoin, FPGA miners paved the way to ASICs, and it was only those that really took GPUs out of the business. At the moment, Blakecoin (and its mergemine coins) have had FPGA miners for some time already, but GPU mining is still somewhat profitable. Of course, the low power consumption is a personal gain for any miner

As for the tech specs -- in any coin, hash.h tells you how the algos are chained up, in this case it's 640-bit data -> Skein -> 512-bit hash -> SHA2 -> final 256-bit hash.

Do have a look at other FPGA projects like the Blakecoin one for examples. Also, I cannot help but link my own -- the Python mining script might still serve as a simple example on how everything works together.

glamorgoblin

newbie

Activity: 3

Merit: 0

Nice. Thanks for the MiriadCoin tip. I have the hash algorithm blocks for a kein or Miriad FPGA miner, but I'm missing the little details like what the initial header fed to the hasher looks like, how the different hash ins/outs connect together (Skein is 512 bits and SHA-256D is 256 bits), if there's anything unique about the difficulty/target calculation, etc. Any advice on where to find these details? I've picked apart source code for other coins before for these details and would rather avoid that frustration if the details are available in a more user friendly form.

chiguireitor

legendary

Activity: 872

Merit: 1010

Coins, Games & Miners

Quote from: glamorgoblin on June 16, 2014, 09:24:24 PM

I am an FPGA dude and stumbled upon SkeinCoin. I just happen to have working Verilog code for Skein512 and SHA256D from other projects. It seems like I could put together an FPGA miner in short order if I was inclined to do so. Should I consider mining SkeinCoins? I can't tell if folks here would like this or not. It may swamp the network hashrate and frustrate CPU/GPU miners. However, if I make it open source and it becomes widely adopted it will likely drive the price up so anyone who's been mining for a while will see their previously mined coins run up in value. It could breath new life into SkeinCoin which may be welcome with it's latest woes.

So, SkeinCoin FPGA solution ... Good thing ... bad thing?

I would vote "Yay!" do it... it would be nice if Skein had this, and here's a tip, Myriad also uses Skein hashing algo, so they could benefit too from your FPGA implementation.

glamorgoblin

newbie

Activity: 3

Merit: 0

I am an FPGA dude and stumbled upon SkeinCoin. I just happen to have working Verilog code for Skein512 and SHA256D from other projects. It seems like I could put together an FPGA miner in short order if I was inclined to do so. Should I consider mining SkeinCoins? I can't tell if folks here would like this or not. It may swamp the network hashrate and frustrate CPU/GPU miners. However, if I make it open source and it becomes widely adopted it will likely drive the price up so anyone who's been mining for a while will see their previously mined coins run up in value. It could breath new life into SkeinCoin which may be welcome with it's latest woes.

So, SkeinCoin FPGA solution ... Good thing ... bad thing?

gielbier

sr. member

Activity: 914

Merit: 250

Making Smart Money Work

Just an update from me;
atm I'm at 462577.59382136 SKC Only 37433 skc away from my .5m target and moved everything away from exchanges.

Why?
I'm working a project with Skeincoin integrated in it, that's why i need it.
(btw. If ppl want to beta test, send me a PM with your emailadres or alias whatever. )

gielbier

sr. member

Activity: 914

Merit: 250

Making Smart Money Work

Quote from: chiguireitor on June 09, 2014, 10:16:54 AM

Quote from: gielbier on June 09, 2014, 05:57:36 AM

Quote from: chiguireitor on June 06, 2014, 09:44:00 PM

Lots of coins got hit on the games/faucet and i've shut down the whole thing until i can resolve the security exploit smartypants found.

Around 0.5 BTC where stolen, not a big loss... but whatever...

"Official" PR here http://cryptocoinfaucet.appspot.com/games/

How much skein was lost?

51k

+11k i lost on scammy Sharexcoin Cry

This hasn't been a good week for me Sad

On a positive note: I've resolved to get the game IAP working this month

Donation addy? I'll send some.

flappyskein Cry

chiguireitor

legendary

Activity: 872

Merit: 1010

Coins, Games & Miners

Quote from: gielbier on June 09, 2014, 05:57:36 AM

Quote from: chiguireitor on June 06, 2014, 09:44:00 PM

Lots of coins got hit on the games/faucet and i've shut down the whole thing until i can resolve the security exploit smartypants found.

Around 0.5 BTC where stolen, not a big loss... but whatever...

"Official" PR here http://cryptocoinfaucet.appspot.com/games/

How much skein was lost?

51k

+11k i lost on scammy Sharexcoin Cry

This hasn't been a good week for me Sad

On a positive note: I've resolved to get the game IAP working this month

gielbier

sr. member

Activity: 914

Merit: 250

Making Smart Money Work

Quote from: chiguireitor on June 06, 2014, 09:44:00 PM

Lots of coins got hit on the games/faucet and i've shut down the whole thing until i can resolve the security exploit smartypants found.

Around 0.5 BTC where stolen, not a big loss... but whatever...

"Official" PR here http://cryptocoinfaucet.appspot.com/games/

How much skein was lost?

chiguireitor

legendary

Activity: 872

Merit: 1010

Coins, Games & Miners

Lots of coins got hit on the games/faucet and i've shut down the whole thing until i can resolve the security exploit smartypants found.

Around 0.5 BTC where stolen, not a big loss... but whatever...

"Official" PR here http://cryptocoinfaucet.appspot.com/games/

teamcryptonator

hero member

Activity: 749

Merit: 503

Blockchain Just Entered The Real World

Skeincoin (SKC) +356.57% past month

https://www.cryptonator.com/winners-losers

congrads

Dosmas

full member

Activity: 162

Merit: 100

Quote from: hostmaster on May 22, 2014, 12:13:43 PM

Quote from: hostmaster on May 21, 2014, 02:56:32 PM

We sponsored Skeincoin pool for you!

Skeincoin pool: http://skc.pool666.com/

Mine with most advanced crypto pool in altcoin history!

Live & Accurate Stats
Dedicated servers with SSD
Professional team
The natural choice for mining
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Visit: http://skc.pool666.com

Sponsored by www.Pool666.com

who wants to join beta tests %0 fee come on!

Pool seems to be down atm?:0

gielbier

sr. member

Activity: 914

Merit: 250

Making Smart Money Work

Quote from: JHermz on May 22, 2014, 11:32:27 PM

100k for sale. If you're interested, PM with an offer.

or put it on atomictrade. Someone keeps buying up skeincoin there. (me)

armcoin

newbie

Activity: 30

Merit: 0

Quote from: JHermz on May 22, 2014, 11:32:27 PM

100k for sale. If you're interested, PM with an offer.

Put the sell order on sharexcoin.com, I will buy.

JHermz

newbie

Activity: 10

Merit: 0

100k for sale. If you're interested, PM with an offer.

hostmaster

sr. member

Activity: 266

Merit: 250

Quote from: hostmaster on May 21, 2014, 02:56:32 PM

We sponsored Skeincoin pool for you!

Skeincoin pool: http://skc.pool666.com/

Mine with most advanced crypto pool in altcoin history!

Live & Accurate Stats
Dedicated servers with SSD
Professional team
The natural choice for mining
PPLNS PAYOUTS
VARDIFF
Cron based payments running every hours
%0 fee

Visit: http://skc.pool666.com

Sponsored by www.Pool666.com

who wants to join beta tests %0 fee come on!

hostmaster

sr. member

Activity: 266

Merit: 250

We sponsored Skeincoin pool for you!

Skeincoin pool: http://skc.pool666.com/

Mine with most advanced crypto pool in altcoin history!

Live & Accurate Stats
Dedicated servers with SSD
Professional team
The natural choice for mining
PPLNS PAYOUTS
VARDIFF
Cron based payments running every hours
%0 fee

Visit: http://skc.pool666.com

Sponsored by www.Pool666.com

Dosmas

full member

Activity: 162

Merit: 100

hahaha, I'd say lets host a highscore:).

Edit:14 now:)

chiguireitor

legendary

Activity: 872

Merit: 1010

Coins, Games & Miners

Thanks to the pointer given by the Legendarycoin team, i've implemented a new "kind" of faucet... Floppy faucet!

http://cryptocoinfaucet.appspot.com/games/floppy?coin=SKC

Be gentle plz....

Also, if anyonye is willing... Here's a personal "thank you" address

SVHSGk6Ly3FzHvkc6oNK9ExrtMC3qbBHCf

Dosmas

full member

Activity: 162

Merit: 100

Quote from: chiguireitor on May 11, 2014, 08:19:38 AM

Quote from: ziplibrary on May 11, 2014, 02:52:56 AM

SkeinCoin is now lived on ShareXcoin: https://sharexcoin.com/market/SKC_BTC

+1 To this exchange, seems like a very nice and clean one

Agree on that, looking really good. lets get some trading going:)

Topic: [ANN] [SKC] Skeincoin 0.9.3.1 | Skein-SHA2 - page 18. (Read 161514 times)