Quote from: kitaco on February 21, 2015, 06:00:22 AM

Quote from: Digital_Currency_LTD on February 21, 2015, 05:54:59 AM

From the OP:

"I've been working on a big coin for the past month, and it's been on my mind for over a year now with all the ideas for it finally having a solid solution and plan to accomplish it. Sadly, Supcoin is not that coin. Basically, I need a coin to test some things, and that is this coin!"

So guys, this is a test coin? When will the main coin release?

It's still a coin by earlz. One of the best programmers with the most knowledge of the bitcoin code out there working on altcoins.

This is what the coin is all about:

Quote from: earlz on February 09, 2015, 01:54:47 AM

Supcoin

Premise

Hello,

I've been working on a big coin for the past month, and it's been on my mind for over a year now with all the ideas for it finally having a solid solution and plan to accomplish it. Sadly, Supcoin is not that coin. Basically, I need a coin to test some things, and that is this coin! I'm not ready to discuss my big coin project just yet (there will be a pre-ann in a couple months), but this coin is my way of making sure that the codebase I'm using is good.

Features:

C'mon, you've always wanted to greet someone by giving them some SUP
Based on bitcoin 0.10 (includes headers-first, which significnalty speeds up syncing times)
5 minute blocks
Block reward halves every 100 days, starting at 10 coins per block
PLUCK, memory hard hashing algorithm based on SHA256, using 128Kb of memory
Digishield difficulty adjustment
addrindex support (use -addrindex to the daemon and you can use RPC calls to query the balance of addresses on the blockchain)
OP_CHECKLOCKTIMEVERIFY support, for advanced timelock contracts (from Viacoin)
All BIPS enabled, including BIP66
Traditional pure PoW
Reasonably small premine of 100 blocks worth, with bounties
First of it's kind Proof Of Permission: Whitepaper

Premine breakdown: (1,000 SUP)

50 SUP for me, to do whatever with(ie, to sell)
350 SUP for a PLUCK Nvidia GPU miner
300 SUP for a PLUCK AMD GPU miner
50 SUP for a NOMP module compatible with PLUCK(including pull requests and acceptance into the project) --CLAIMED (python module by ocminer: https://github.com/ocminer/pluck-hash )
200 SUP for someone who can takeover this coin with a real marketing plan, etc
50 SUP for whoever can make a decent logo (see below) -- CLAIMED

Also, I accidentally premined 1 additional block, worth 10 SUP. This will be given to Wolf` as a tip for his work in testing the coin, algorithm, and spotting some huge bugs.

PLUCK:

PLUCK is a configurable hashing algorithm using SHA256. I developed PLUCK because most algorithms are not actually memory hard. They are constructed in such a way that many things can be chosen to not be stored into memory and can instead be recalculated. PLUCK does not suffer from this exploit. See also this article for more explanation.

This is similar to a merkelhash in a way, but is specifically designed for PoW to not allow breaking the memory hardness requirement. ASICs will always be possible, but would require expensive and large memory caches that can not be optimized away in anyway.

The core weakness in scrypt is that most variables stored in memory can easily be calculated more than once to save on memory costs. Although this is in theory less effecient, it ends up making ASICs and such faster by requiring less (expensive) cache memory.

This hashing algorithm is designed so that this can not take place. Recalculating anything stored in memory is as expensive as recalculating all the progress made thusfar on the hash. In the worst case, it may be possible reduce memory costs by 50% by recalculating the first half of the SHA256 hash values, but this would of course have extremely diminishing returns since this requires many SHA256 hashes to be computed.

Normally, I would scoff at the idea of writing my own hashing algorithm. However, I've taken precautions to ensure that this is at least as secure as sha256. Sha256 has a block input size of 512 bits, or 64 bytes. In ALL hashes generated, at least 256 bits of this input consists of an unmodified SHA256 hash generated previously. This ensures that the algorithm carries over SHA256's collision resistance and preimaging protection. Because of this property, I feel it is a safe cryptographic hash. The worst case is that the memory-hardness aspect is broken. The hash itself should never be broken (ie, collisions or preimages) unless SHA256 is broken in some way.

Supcoin

So, I'm a pretty busy guy. I'm still working a lot on the coin that comes after this. However, I intend to do maintenance on Supcoin at least until that coin is released. Supcoin should ideally be trivial to maintain as I strive to write coins that don't need forks and such to fix things. However, any issues that come up I will fix. I will not be adding gimmicky features however. I might add some non-forking features eventually just to test them out on a live network, but I'm not making any promises on that.

I will not do any kind of coin swap or anything like that when I release the next coin I'm working on, however, I might offer some kind of rewards for people that held some amount at some point in time, as an additional distribution mechanism.

Anyway, I'm a developer, not a marketer or community manager or anything like that. If you are someone who could do a "takeover" of the project, then have at it! I'll be holding onto 200 SUP to reward for a successful community takeover with a leader that proves they aren't just trying to do a pump and dump (ie, after some amount of time)

GPU MINER BOUNTY
In order to raise tangible funds to motivate GPU miner devs, I am now hosting a donation address for Bitcoin.

1K6cUbtsn5xinD8XfjnTn7UnsMriLhZaGD

The first GPU miner to be created (AMD or Nvidia) and published under an open source license will receive all the money from this fund.

I'm putting in 0.25 BTC of my own money. I encourage everyone to donate what you can to help make this a lucrative bounty.