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1  Alternate cryptocurrencies / Altcoin Discussion / [GRA]Grain Giveaway Thread. Each Account Gets 5000 to 20000 GRAs! (closed now) on: December 28, 2013, 10:56:42 PM

* Closed now, thanks for all who participated. *

This is the 2nd giveaway thread for Grain.

Grain - GRA, is a PoW/PoS coin launched 3 weeks ago. Its main thread is:

Grain has a great community support as seen in the above main thread. Grain team is committed to support the coin. It has a great future!

The minimum conditions to receive the coin is (a) at least activity is 10 (b) posted at least 3 meaningful messages in the forum, in last month (any simple 1-2 words messages and request giveaway messages are not counted as meaningful).

Normal giveaway is 5000 GRAs. If you posted at Grain main thread, you get 10000 GRAs. If you posted frequently (say more than 3 times) in Grain thread, then you are an active member of Grain community and you receive 20000 GRAs for giveaway.

So post at our main thread to get more giveaways Wink

Let's start Wink

2  Alternate cryptocurrencies / Altcoin Discussion / [Poll] Choose the GRA logo you like the best! on: December 13, 2013, 05:54:09 AM
We are looking for the best logo for Grain - GRA.

In the main thread of GRA:

many great logo designs have been posted. Please choose from the follow 3 design the best for the GRA.

The poll will open for 3 days. Please cast your vote!

Logo Design (1)

Logo Design (2)

Logo Design (3)
3  Alternate cryptocurrencies / Altcoin Discussion / [GRA] 10000 GRAs giveaway per person - Grain - the great crypto coin!! on: December 08, 2013, 05:59:06 AM
Due to the fact that GRA becomes a pure PoS coin now, I will close the giveaway thread. It may re-open if the PoW blocks can be regenerated later. The giveaways have been sent to all the eligible miners to #574.

Giveaway thread for Grain -  GRA
Each person gets 10000 GRAs !!!

Post your wallet address, and get 10000 GRAs each.

One person please post one address. Also limit to the accounts registered before December 1, 2013, and with at least 10 activities. I may also decline those who have no or very few recent posts in this forum (those are likely one of many accounts from the same user).

Limit to first 1000 persons.

The main thread for Grain - GRA:

Let's go!!!


Q1: Why I don't get giveaway after posted the address?
A: Please check the above conditions.

Q2: Why put these restrictive conditions?
A: This is to prevent people create 20 accounts and get free GRAs. If you are new members and really want to get involved, then post actively in the GRA main thread. If you are actively involved with the GRA community, I'll send you the giveaway.

4  Alternate cryptocurrencies / Announcements (Altcoins) / [ANN][GRA] Graincoin - New PoW/PoS coin | Fast, secure | Version 1.5 Released! on: December 07, 2013, 08:19:56 PM

Version 1.5 Released. Version 1.5 is a mandatory upgrade, so please upgrade as soon as possible to avoid a fork. Version 1.5 fixes the superblock issue, making Graincoin the first coin ever to generate superblock in a truely random way. This will eliminate the hackers from getting most of the superblocks. Version 1.5 also includes some minor bug fixes. The switchover point is set at block 310000, which will be in about 5-7 days (we are at block 277100 now). Download links for Windows Client and source in github are updated.

Please vote Graincoin for being added to exchanges:
For cryptsy:

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, blockexplorer, etc. Graincoin also provides 5% annual interest on the grained held. The interest will be paid about every 2 weeks.


   - 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

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

Official websites:

Graincoin is on CoinMarketCap:

Graincoin on Cryptoarticles:



SwissCoin Exchange:



Mining Pools

udjin123's Stratum's Mining Pool
registration needed
fee 0%

DAOneG's Grainer Pool
STRATUM: stratum+tcp://
PORT: 3333

Block Explorer

Shops, Services, Games that accept GRA

Graincoin is supported by Coinpayments, which provides wonderful tools and utilities to accept Graincoin as payments for the shops, services.
Tutorial for how a shop/service can integrate with Coinpayments will be avaialble soon.

Wood Shot Glass - it has Graincoin customized shot glasses!

Tuff Wraps

Computer hardware and consumer electronics

WaterIdo - Healthy Water Revitalizer  

Xbox Gold 48 Hour Codes - 2 for $1

Iquidus Technology - OpenSource Software, Hi-Performance Hardware

Retro Towers - Gaming Hardware

Citrus Fit - Weight loss and detox products

Stickerz Lab - French Sticker Decorations

Pixcoin - Stickers for Crypto Coins

Crypto GameKeys - Buy CD Keys, PSN cards, PS3/4/Vita games

ThanksBitcoin - a Bitcoin shop

Crypto Coin Stuff - Cryptocoin banners, stickers etc

Advertise Service

Socials, Discussions etc

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:


Facebook pages:


100K GRAs for shops, services, games that accept Grain!
Note: personal blogs are not considered as services.

Bounties will be given out as needed, for significant contributions to the Grain or its promotions.

Giveaways (closed) (closed)


Downloads (Version 1.5)

Windows Client Downloads!8gIQxTiY!-bAYs5FiFSWQFcuKiNQIWOAUFEp6EQMY2f4SaoWcKU8

Source Code Download

Mining Configurations

Using the following nodes to join the network:


Sample Config File (grain.conf):


How to Solo Mine

1. Start up grain-qt, wait for it to load, then exit.
2. Put grain.conf (see sample file above) in your c:/users/**yourcomputername**/AppData/Roaming/Grain
3. restart grain-qt, and you should connect and sync.
4. For solo mining, launch cgminer or the mining program you use and begin mining.
      cgminer ex: cgminer.exe --scrypt -o localhost:11055 -u **yourusername** -p **password** (without **)

5  Alternate cryptocurrencies / Altcoin Discussion / untitled on: December 02, 2013, 06:06:42 AM
6  Other / Beginners & Help / Altcoins will have any future? on: November 09, 2013, 06:45:46 PM
Since the launch of Bitcoin, many copycats are created, some with new algorithms,such as scrypt, pow/pos, etc. But the framework is what defined by BTC. Any futures for these altcoins?
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