Version 1.6.2 Released. Download links for Windows Client and source in github are updated. To save your time and resources the separate link for blockchain data is provided in downloads section.




A grain is a unit of measurement of mass that is nominally based upon the mass of a single seed of a cereal. From the Bronze Age into the Renaissance the average masses of wheat and barley grains were part of the legal definition of units of mass. However, there is no evidence of any country ever having used actual seeds or cereal grains. Rather, expressions such as "thirty-two grains of wheat, taken from the middle of the ear" appear to have been ritualistic formulas, essentially the premodern equivalent of legal boilerplate.

- from Wikipedia



Graincoin (GRA)

Graincoin is a PoW/PoS coin that is designed to be the unit of cyber-coin. It has a total of 50 billion unit to be released, through a fair p2p mining process. It is fast, secure and have sufficient coins for circulation so it can be used in real daily shopping.

Graincoin is from the family of PPCoin/Novacoin with latest available algorithms that fixed various problems in the PoW/PoS coins. As compared to the PoW only coins, the proof of stake coins are more resilient to 51% attack. Also it is a long term energy-efficient crypto-currency since not all coins are obtained by mining.

Each graincoin block provides random 1024 - 2048 grains initially. It also provides rare superblocks. The coin uses hash-based algorithm to determine superblocks based on the number of 9s in the previous block hash. It works as follows:

- the hash contains six 9s or less: regular block
- the hash contains seven or eight 9s: 8 times the regular block (about 5% chances)
- the hash contains nine or more 9s: 64 times the regular block (about 1% chances)

Premined 1% as reserved bounty and reward for developers, giveaway, pool, explorers, etc. Graincoin also provides 5% annual interest on the grained held. The interest will be paid about every 2 weeks.





Specifications

   - scrypt
        - 30 seconds block target
   - 1024-2048 grains per block for normal blocks
   - 8 times or 64 times the regular payout per block for super blocks depends on the number of 9s in the previous hash
   - Difficulty retargets every block
   - mining payout will be halved every 90 days (259200 blocks)
   - minimum payout per block 1 coin
   - Total grains will be 50 billions
   - 6 confirmations for transaction
   - 50 confirmations for minted blocks
   - PoS interest 5% yearly
   - PoS min age 10 days
   - PoS max age 30 days

   - Ports: 11054 (connection) and 11055 (RPC)


Official websites:
http://www.graincoin.net
http://www.graincoin.org



Graincoin is on CoinMarketCap:
http://coinmarketcap.com/


Graincoin on Cryptoarticles:
http://www.cryptoarticles.com/crypto-news/2014/1/25/coinpayments-now-supports-grain
http://www.cryptoarticles.com/crypto-news/2014/1/15/grain-the-future-unit-of-cyber-coin
http://www.cryptoarticles.com/crypto-news/2014/1/18/grain-new-wallet-released-version-14
http://www.cryptoarticles.com/crypto-news/2014/1/23/grain-more-valuable-than-yould-think


Exchanges

None to the moment


Block Explorer

http://explorer.graincoin.net/


Shops, Services, Games that accept GRA

None to the moment


Socials, Discussions etc

Twitter
 
The following socials, discussion groups etc are sponsored by Grain mining members. They are "unofficial" and are not managed/admin'd by the Grain Dev Team.

 

Cryptocointalk discussion threads:
https://cryptocointalk.com/forum/509-grain-gra/

Subreddit:
http://www.reddit.com/r/Graincoin/

Facebook pages:
https://www.facebook.com/Graincoin
https://www.facebook.com/Graincoin.Cryptocurrency

Coinwiki GrainCoin article:
http://coinwik.org/Grain




Downloads (Version 1.6.2)

Windows Client Downloads

sourceforge.net:
graincoin-1.6.2.0-win32.zip


Source Code Download
https://github.com/graincoin-project/graincoin

Block Chain Download

To save your time on synchronization or reindexing the blockchain, download the blockchain.zip file and unzip its content into %APPDATA%\Grain folder on Windows systems or into ~/.Grain on Unix/Linux systems. If you choose this possibility and have existing wallet then start the grain-qt/graind with '-rescan' option for the first time after unpacking the blockchain files.

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