[ANN][GRA] Graincoin - PoW/PoS coin | Fast, secure | Version 1.6.2 Release

[bee7]

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.

Here is the link to original GrainCoin thread for historical purposes.

[platorin]

Thx for the info.

[tozak]

I don't suppose anyone can help me out, I transferred 4 million graincoins last week but used the wrong wallet to do the transfer I used version 1.4 not 1.5 and now the coins seem to be lost?

Using the same wallet file if I open in version 1.4 it says 308 confirms and transferred okay, but not received on other end, if I open the same wallet file in version 1.5 is stays at 0 confirms and shows it as deducted from my available balance.

Anyway to get these coins back or to complete the transfer? I have reloaded the block-chain about 5 times now but no help.

[bondi]

I don't suppose anyone can help me out, I transferred 4 million graincoins last week but used the wrong wallet to do the transfer I used version 1.4 not 1.5 and now the coins seem to be lost?

Using the same wallet file if I open in version 1.4 it says 308 confirms and transferred okay, but not received on other end, if I open the same wallet file in version 1.5 is stays at 0 confirms and shows it as deducted from my available balance.

Anyway to get these coins back or to complete the transfer? I have reloaded the block-chain about 5 times now but no help.

You can try running repairwallet in the debug console or do -rescan from the command line like: grain-qt -rescan

[bee7]

I don't suppose anyone can help me out, I transferred 4 million graincoins last week but used the wrong wallet to do the transfer I used version 1.4 not 1.5 and now the coins seem to be lost?

Using the same wallet file if I open in version 1.4 it says 308 confirms and transferred okay, but not received on other end, if I open the same wallet file in version 1.5 is stays at 0 confirms and shows it as deducted from my available balance.

Anyway to get these coins back or to complete the transfer? I have reloaded the block-chain about 5 times now but no help.

Run the wallet with -rescan option. If these coins were sent while the wallet was on the wrong fork (that most likely had place as v1.4 is incompatible with v1.5) and the coins were mined/received before the previous hardfork at block 310000 then they should be recovered.

[hoertest]

its great to see a fresh start for grain, still love this coin, hope it will make a comeback,it has the potential,  after giving it some thought i don't think its a great idea to lock grain to the real world grain supply like suggested in the old thread. i first liked the idea because it would give grain a niche, something more unique, but as speculation on food prices doesn't have the best reputation it could also backfire.

[athur0s]

Hi

I can't sync my wallet. Are there any nodes which are working?

Thanks

Athuros

[bee7]

Hi

I can't sync my wallet. Are there any nodes which are working?

Thanks

Athuros

Although the IRC seeding is fixed and working, here are some nodes for you:

Code:

addnode=2.248.164.206
addnode=24.26.143.166
addnode=76.95.184.181
addnode=192.99.15.174
addnode=95.27.64.96

Also, please note, that the blockchain file with related LeveDB files is available for download. It has about 660k blocks.
Take to account that the indexing of that amount of blocks itself requires quite sensible time.

[fastrabbit]

Grain, that's a really interesting coin, I especially like the idea that it will link to the real grain market! Awesome ideas!

BTW, what are the new things in version 1.6?

[athur0s]

Hi

I can't sync my wallet. Are there any nodes which are working?

Thanks

Athuros

Although the IRC seeding is fixed and working, here are some nodes for you:

Code:

addnode=2.248.164.206
addnode=24.26.143.166
addnode=76.95.184.181
addnode=192.99.15.174
addnode=95.27.64.96

Also, please note, that the blockchain file with related LeveDB files is available for download. It has about 660k blocks.
Take to account that the indexing of that amount of blocks itself requires quite sensible time.

Thanks that woked.

[bee7]

Grain, that's a really interesting coin, I especially like the idea that it will link to the real grain market! Awesome ideas!

BTW, what are the new things in version 1.6?

The idea to link to the real grain market, at least as it was outlined by hozer in https://bitcointalk.org/index.php?topic=361503.msg6980579#msg6980579 ,  requires completely different emission model. So, I doubt this would happen to the GrainCoin. However, if the discussion of this subject would end up in something good to try then we could implement it as a separate project.

There is a number of fixes. The two most important problems fixed are excessive orphaning and the bad wallet response time when it has any inputs to perform PoS minting.
Also, a few optimizations to the block tree storage and block handling have been done. These optimizations save approximately 20% of CPU time in block handling and drastically decrease the wallet startup time.

I am planning to include in the future release the CoinControl support.

[bee7]

I have been told that the splash screen in GUI version has the old version number. If this makes sense for you, please download the fixed one: http://sourceforge.net/projects/graincoin/files/v1.6/graincoin-1.6.0.0-win32.zip/download. The download link in the OP is updated as well.

[fastrabbit]

Grain, that's a really interesting coin, I especially like the idea that it will link to the real grain market! Awesome ideas!

BTW, what are the new things in version 1.6?

The idea to link to the real grain market, at least as it was outlined by hozer in https://bitcointalk.org/index.php?topic=361503.msg6980579#msg6980579 ,  requires completely different emission model. So, I doubt this would happen to the GrainCoin. However, if the discussion of this subject would end up in something good to try then we could implement it as a separate project.

There is a number of fixes. The two most important problems fixed are excessive orphaning and the bad wallet response time when it has any inputs to perform PoS minting.
Also, a few optimizations to the block tree storage and block handling have been done. These optimizations save approximately 20% of CPU time in block handling and drastically decrease the wallet startup time.

I am planning to include in the future release the CoinControl support.

Thanks for the info, grain market is interesting. Though I am not sure how many people will be interested.

Coincontrol is very easy to add, some other coins added it, so you can just see the diff, for example, the MintCoin:
https://github.com/mintcoinproject/mintcoin/commit/af6c0b9debca664975fbe570d6ac17acf92094f0

took me last time 20 mins to add it for another coin...

BTW, are you going to remove orphans from the tx display? I got a lot orphans hanging there, pretty annoying.

[landslide]

this coin should be traded more actively

[timerland]

this is a serious coin, glad it is still alive

[workminer]

upgrade,but my coin is reducd

[timerland]

upgrade,but my coin is reducd

open console and type "repairwallet"

[bee7]

Thanks for the info, grain market is interesting. Though I am not sure how many people will be interested.

Coincontrol is very easy to add, some other coins added it, so you can just see the diff, for example, the MintCoin:
https://github.com/mintcoinproject/mintcoin/commit/af6c0b9debca664975fbe570d6ac17acf92094f0

took me last time 20 mins to add it for another coin...

Yes, I know this. I did not do it with this update just because the lack of time and urgent need to release more important fixes. Also, this addition does not require a hardfork, so may be issued anytime.

BTW, are you going to remove orphans from the tx display? I got a lot orphans hanging there, pretty annoying.

Let's see how it would perform after midnight. Even now, before time-triggered fixes are in effect, I see much less orphans in my wallet. If it is still necessary, then I add an option to the interface not to show orphaned blocks.

[vanish9]

http://gra.pool.mn/ will soon be ready for mining!

http://gra.pool.mn/ offers:
• 0,99% fees
• Powerful dedicated server
• DDOS Protection
• Friendly support via email, jabber or support forums
• Skilled admin

Please, join us

[bee7]

http://gra.pool.mn/ will soon be ready for mining!

http://gra.pool.mn/ offers:
• 0,99% fees
• Powerful dedicated server
• DDOS Protection
• Friendly support via email, jabber or support forums
• Skilled admin

Please, join us

Good. Tell me your grain address please.

Please keep in mind that the x7 and x63 reward is paid in a separate conbase tx that is sent in the block following the winning one.

Edit: the OP updated.