[ANN][GRS] Groestlcoin | 1st to activate Segwit & Taproot

[jackielove4u]

I am getting invalid nonce errors.  Its not submitting any valid shares solo mining.  Does this work with AMD 15.x.x drivers? 

Thanks

Yes it works with all AMD drivers.
Which wallet are you using? Can u share your bat file config which u use? Whats the exact error? BTW Dont use this sgminer for dmd, it wont work.

I am using Groestlcoin Core version v2.11.0

The bat file looks like this:

setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS

sgminer.exe -k groestlcoin -o http://192.168.1.15:1441 -u x -p x --grs-address xxx  -g 1 -w 256 --no-submit-stale -I 20 --gpu-engine 1000 --gpu-memclock 1200

Thanks for the help.

ur sgminer bat file should look like this:

Code:

setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1
setx GPU_MAX_HEAP_SIZE 50
sgminer.exe -k groestlcoin -o http://192.168.1.15:1441 -u YourRpcUsernameHere -p YourRpcPAssHere --grs-address YourGrsAddressHere --grs-sig DMDCreeper -g 1 -w 256 --no-submit-stale -I 20 --gpu-engine 1000 --gpu-memclock 1200

ur groestlcoin.conf should look like this:

Code:

server=1
rpcuser=YourRpcUsernameHere
rpcpassword=YourRpcPAssHere
rpcport=1441
rpcallowip=YourMiningRigIpHere

Make sure grs wallet is fully synced. Can u send a screenshot of the sgminer error?

[1714827134]

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[1714827134]

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[1714827134]

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[DMDCreeper]

I am getting invalid nonce errors.  Its not submitting any valid shares solo mining.  Does this work with AMD 15.x.x drivers? 

Thanks
[/quote]

Yes it works with all AMD drivers.
Which wallet are you using? Can u share your bat file config which u use? Whats the exact error? BTW Dont use this sgminer for dmd, it wont work.
[/quote]

I am using Groestlcoin Core version v2.11.0

The bat file looks like this:

setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS

sgminer.exe -k groestlcoin -o http://192.168.1.15:1441 -u x -p x --grs-address xxx  -g 1 -w 256 --no-submit-stale -I 20 --gpu-engine 1000 --gpu-memclock 1200

Thanks for the help.


[/quote]

ur sgminer bat file should look like this:

Code:

setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1
setx GPU_MAX_HEAP_SIZE 50
sgminer.exe -k groestlcoin -o http://192.168.1.15:1441 -u YourRpcUsernameHere -p YourRpcPAssHere --grs-address YourGrsAddressHere --grs-sig DMDCreeper -g 1 -w 256 --no-submit-stale -I 20 --gpu-engine 1000 --gpu-memclock 1200

ur groestlcoin.conf should look like this:

Code:

server=1
rpcuser=YourRpcUsernameHere
rpcpassword=YourRpcPAssHere
rpcport=1441
rpcallowip=YourMiningRigIpHere

Make sure grs wallet is fully synced. Can u send a screenshot of the sgminer error?
[/quote]

Still getting invalid nonce errors.  Here is a screen shot

[jackielove4u]

Still getting invalid nonce errors.  Here is a screen shot

change ur sgminer bat file like this:

Code:

setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1
setx GPU_MAX_HEAP_SIZE 90
sgminer.exe -k groestlcoin -o http://192.168.1.15:1441 -u YourRpcUsernameHere -p YourRpcPAssHere --grs-address YourGrsAddressHere --grs-sig DMDCreeper -g 1 -w 256 --no-submit-stale -I 20 --gpu-engine 1000 --gpu-memclock 1200

change ur groestlcoin.conf like this:

Code:

server=1
rpcuser=YourRpcUsernameHere
rpcpassword=YourRpcPAssHere
rpcport=1441
rpcallowip=YourMiningRigIpHere

I just tested solo mining and it works.
If you change all like above, try lowering intensity to 18, and using the kernel inside the archive. If it isnt that, then u could be right that it could be a AMD driver issue

[DMDCreeper]

change ur sgminer bat file like this:

Code:

setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1
setx GPU_MAX_HEAP_SIZE 90
sgminer.exe -k groestlcoin -o http://192.168.1.15:1441 -u YourRpcUsernameHere -p YourRpcPAssHere --grs-address YourGrsAddressHere --grs-sig DMDCreeper -g 1 -w 256 --no-submit-stale -I 20 --gpu-engine 1000 --gpu-memclock 1200

change ur groestlcoin.conf like this:

Code:

server=1
rpcuser=YourRpcUsernameHere
rpcpassword=YourRpcPAssHere
rpcport=1441
rpcallowip=YourMiningRigIpHere

I just tested solo mining and it works.
If you change all like above, try lowering intensity to 18, and using the kernel inside the archive. If it isnt that, then u could be right that it could be a AMD driver issue

[/quote]

I tried using different versions of AMD drivers and tried on 2 different rigs with the same results.  No matter what intensity no valid shares are found, only the invalid nonce error. 

I will try various groestlcoin.cl files and see if that helps.

Thanks again for the help.

[DMDCreeper]

change ur sgminer bat file like this:

Code:

setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1
setx GPU_MAX_HEAP_SIZE 90
sgminer.exe -k groestlcoin -o http://192.168.1.15:1441 -u YourRpcUsernameHere -p YourRpcPAssHere --grs-address YourGrsAddressHere --grs-sig DMDCreeper -g 1 -w 256 --no-submit-stale -I 20 --gpu-engine 1000 --gpu-memclock 1200

change ur groestlcoin.conf like this:

Code:

server=1
rpcuser=YourRpcUsernameHere
rpcpassword=YourRpcPAssHere
rpcport=1441
rpcallowip=YourMiningRigIpHere

I just tested solo mining and it works.
If you change all like above, try lowering intensity to 18, and using the kernel inside the archive. If it isnt that, then u could be right that it could be a AMD driver issue

I tried using different versions of AMD drivers and tried on 2 different rigs with the same results.  No matter what intensity no valid shares are found, only the invalid nonce error. 

I will try various groestlcoin.cl files and see if that helps.

Thanks again for the help.
[/quote]

UPDATE:

I found some old groestlcoin .bin files from when I mined DMD using the groestlcoin kernel and an earlier version of sgminer a couple of years ago.  Since I had tried everything else to eliminate the HW errors I figured it couldn't hurt to switch the bin files.  It turns out, using the old .bin files worked, at least on one rig.  That miner is now submitting valid shares with no hardware errors.  I will try the same thing with my other rigs when I get a chance.

I will leave it to the techies to explain why this worked.

[jackielove4u]

A BIP-0032/-0039/-0044 compatible Hierarchical Deterministic Groestlcoin Wallet

After a measure of hard work adapting the latest Wallet32 (v0.3.17) for Android to Groestlcoin, the Groestlcoin wallet32 beta (v0.1.3) is ready for testing. The app allows you to send and receive Groestlcoins on your device using QR codes and URI links. When using this app, please store your secret phrase and email them to yourself! Then your coins can be retrieved even if you loose your phone.

Groestlcoin wallet32 implementations:
BIP-0032 to implement a hierarchical deterministic wallet
BIP-0039 to implement a mnemonic code of mnemonic sentence for the generation of deterministic wallets (process for turning in into a BIP-0032 seed)
BIP-0044 to implement a logical hierarchy for deterministic wallets based on an algorithm described in BIP-0032 (specific format of a BIP-0032 wallet)

Changelog Groestlcoin Wallet32 v0.1.3h :
• Updated DNS seeds
• Updated Checkpoints
• Updated Protocol number
• Bloom filters enabled
• Changed all KeyCrypts to Groestl

Features
• Multiple logical "accounts" within each wallet.
• Fresh receive and change addresses are used for each transfer.
• Wallet only needs to be backed up once, on initial creation.
• Wallet backup consists of simple list of 12 common words (BIP-0039).
• Same wallet may be securely accessed concurrently from multiple devices.
• Wallet data is protected by Groestl passcode.
• Import paper wallets and sweep them.

It is appreciated if feedback of the following is provided:
1.  Can you receive coins? (small amounts to avoid losing them)
2.  Can you send coins?
3.  Can you scan a QR code from another phone.
4.  Can you request coins via email or other android service?
5.  How long does it take to sync the blockchain?
6.  How much space does it take up on your phone?
7.  Does it calculate exchange rates properly?

Important:
Store your secret phrase somewhere safe!

To close the app, simply press the back button until you reach your home screen.  The app will close itself (there is no need for a disconnect option). This application is licensed under the GPL version 3. There is no warranty and no party shall be made liable to you for damages. If you lose coins due to this app, no compensation will be given. Use this app solely at your own risk.

The application may have unfound bugs and problems. To leave feedback: 
1. PM hashengineering on bitcointalk: https://bitcointalk.org/index.php?action=profile;u=155038
2. Email: hashengineeringsolutions@gmail.com
3. Reports of errors can also be posted in this topic.

Groestlcoin Wallet32 is available in the Google play store:
https://play.google.com/store/apps/details?id=hashengineering.groestlcoin.wallet32

Source code:
https://github.com/HashEngineering/groestlcoinj - Groestlcoin Java Library (for the Android App and possibly other software)
https://github.com/GroestlCoin/GroestlCoin-Wallet32 - The Groestlcoin wallet32 Android Source code

Finally got time to test this:

1.  Yes
2.  Yes
3.  Yes
4.  Yes
5.  Pretty long compared with the other android wallets
6.  Very small
7.  Yes

[gavrilo77]

Is there some guide how to mine solo, because with 127.0.0.0 is not possible to start sgminer even when everything is ok in conf file

rpcport 1441
rpcallowip 127.0.0.1

I have seen some explanation to use mining_proxy but seems i dont know how to start.

Thanks

[jackielove4u]

Is there some guide how to mine solo, because with 127.0.0.0 is not possible to start sgminer even when everything is ok in conf file

rpcport 1441
rpcallowip 127.0.0.1

I have seen some explanation to use mining_proxy but seems i dont know how to start.

Thanks

http://groestlcoin.org/forum/index.php?topic=427.0

[gavrilo77]

Is there some guide how to mine solo, because with 127.0.0.0 is not possible to start sgminer even when everything is ok in conf file

rpcport 1441
rpcallowip 127.0.0.1

I have seen some explanation to use mining_proxy but seems i dont know how to start.

Thanks

http://groestlcoin.org/forum/index.php?topic=427.0

Thanks. It works now.

[metalron]

Are we getting more models anytime soon?

[jackielove4u]

Bump for new visitors

Hi!

Groestlcoin has been accepted on https://noobie.io marketplace.
You can now purchase services and goods and pay with GRS.

Also a reminder for ATM users:
You can buy and sell GRS on the ATM's of General Bytes: http://www.generalbytes.com/
GRS is one of the accepted coins on General Bytes:
https://github.com/GENERALBYTESCOM/batm_public/tree/master/server_extensions_extra/src/com/generalbytes/batm/server/extensions/extra

Best regards

gruve_p

[jkminkov]

why I get 40% of rejects by amd gpu miner, it says - ....rejected (inconclusive), I do have blocks - about 29,66 per day with 13,06Mh/s WU:46.36/m

[jackielove4u]

why I get 40% of rejects by amd gpu miner, it says - ....rejected (inconclusive), I do have blocks - about 29,66 per day with 13,06Mh/s WU:46.36/m

Assuming you are solo mining (your address is FhN13HJhPQVo6Pj8p7jgDVPxu1XtoaB7MG by any chance? levski1914?), that means your blocks is being orphaned because of low hashrate. The higher your hashrate the lower orphan rate when solo mining. Its better to pool mine with such low hashrate.

[jwinterm]

why I get 40% of rejects by amd gpu miner, it says - ....rejected (inconclusive), I do have blocks - about 29,66 per day with 13,06Mh/s WU:46.36/m

Assuming you are solo mining (your address is FhN13HJhPQVo6Pj8p7jgDVPxu1XtoaB7MG by any chance? levski1914?), that means your blocks is being orphaned because of low hashrate. The higher your hashrate the lower orphan rate when solo mining. Its better to pool mine with such low hashrate.

Why would your blocks get orphaned because of low hashrate? That doesn't make any sense. Maybe if you have poor internet they would get orphaned because of propagation delay, but I don't see what low hashrate has to do with it. Also, the network hashrate is only 341 Mh/s, so he is mining with about 4% of the network hashrate, that doesn't seem very low in the scheme of things.

[jackielove4u]

why I get 40% of rejects by amd gpu miner, it says - ....rejected (inconclusive), I do have blocks - about 29,66 per day with 13,06Mh/s WU:46.36/m

Assuming you are solo mining (your address is FhN13HJhPQVo6Pj8p7jgDVPxu1XtoaB7MG by any chance? levski1914?), that means your blocks is being orphaned because of low hashrate. The higher your hashrate the lower orphan rate when solo mining. Its better to pool mine with such low hashrate.

Why would your blocks get orphaned because of low hashrate? That doesn't make any sense. Maybe if you have poor internet they would get orphaned because of propagation delay, but I don't see what low hashrate has to do with it. Also, the network hashrate is only 341 Mh/s, so he is mining with about 4% of the network hashrate, that doesn't seem very low in the scheme of things.

Well that is how Wolf0 explained it or i understood it :-P It is not being rejected by the network but locally by ur own deamon (look at the orphan chart at https://chainz.cryptoid.info/grs/#!extraction ) as i understood it. But then it was almost a year ago when i talked about this with him.
I tested btw with 1 gpu (30 mhz) and i got higher inconclusive rate. When i mined with 6 then it was much lower. Perhaps a bug in the sgminer?

[jkminkov]

I was in a pool, but delivering like 95% of hashrate, it doesn't make sense for network security as dwarfpool has more than 80% of network, and my ping to them is 65-85ms, suprnova is even better 45-65

[jackielove4u]

I was in a pool, but delivering like 95% of hashrate, it doesn't make sense for network security as dwarfpool has more than 80% of network, and my ping to them is 65-85ms, suprnova is even better 45-65

Did you try https://www2.coinmine.pl/grs/ and https://groestlcoin.miningpoolhub.com/ ?
Most people are on Dwarfpool because there is no need to make an account.

[gruve_p]

AGCore is an Android app designed to make it easier to run a Groestlcoin Core node on always on Android appliances such as set top boxes or repurposed tables/phones.

If you are an simple user of Groestlcoin and want an Android app that makes it easy to run Groestlcoin Core by acting as a wrapper, then AGcore is the right choice for you.

Features
• AGCore runs on Android Devices
• No need to keep active your PC/Server 24/7
• Low power consumption
• You can edit groestlcoin.conf
• APK downloads the necessary architectures from Debian repositories (https://packages.qa.debian.org/g/groestlcoin.html)
• All Groestlcoin builds on Debian are maintained by the Debian Bitcoin Packaging Team (https://qa.debian.org/developer.php?login=pkg-bitcoin-devel@lists.alioth.debian.org)
• Supports amd64, i386, armhf and aarch64 architectures
• Easy replace external hard drive to store the Block-Chain
• You can install it on home devices that are already active 24/7 (like Minix Neo)
• Easy - no need to search for extra nodes and edit the conf file
• Free and decentralised - Open Source under MIT license

It is appreciated if feedback of the following is provided:
1. Can you install AGcore on your Android home device(s)?
2. Does it start syncing?

This application is licensed under MIT. There is no warranty and no party shall be made liable to you for damages. If you lose coins due to this app, no compensation will be given. Use this app solely at your own risk.

The application may have unfound bugs and problems. To leave feedback: 
1.  PM hashengineering on bitcointalk: https://bitcointalk.org/index.php?action=profile;u=155038
2.  Email: hashengineeringsolutions@gmail.com
3.  Reports of errors can also be posted in this topic.

Important:
This app requires a gigabyte of disk space and is not to meant to run on 3G or 4G networks as it potentially downloads/uploads megabytes of data. Root is not required.

Groestlcoin Wallet is available in the Google play store:
https://play.google.com/store/apps/details?id=com.hashengineering.abcore

Source code:
https://github.com/groestlCoin/agcore

[gruve_p]

Simple Groestlcoin is a standalone wallet for Android devices which does not depend on any centralized service and gives you full control over your precious groestlcoins. Its main advantages over the original Groestlcoin Android client include support for HD wallet.

Features
• A single-page application which allows you to store your Groestlcoins securely and transfer them easily.
• It is an HD wallet which means your balance and full transaction history can always be restored using a single mnemonic code should anything bad happen to your device.
• This wallet is intended for mobile devices, hence it does not store a full Blockchain but instead acquires all the relevant data from random groestlcoin nodes using an SPV technique.
• Self-Destruction functionality. Set up a secret code which you can use to self-destruct all wallet data. Use your mnemonic code to restore your wallet again.
• Open source under GPL v3 License
• Wallet only needs to be backed up once, on initial creation.
• Wallet backup consists of simple list of 12 common words (BIP-0039).
• No servers just the Groestlcoin network using the Groestlcoinj library.
• Simple and intuitive user interface.
• No worrying about losing private keys any more - use your "wallet words" (seed phrase) to restore them.

Mnemonic code
Simple Groestlcoin is a so called HD wallet: all Groestlcoin addresses and private keys come from a single mnemonic code which is essentially a phrase comprising of 12 random words. Please remember: whoever knows your mnemonic code also fully controls your Groestlcoins so it should be kept private at all times.
Also, in case if you lose your device or forget your wallet password only mnemonic code can get your Groestlcoins back, it's that important! Ideally one of the following actions should be taken once a new wallet is created:
• Either write your mnemonic code on a piece of paper and store it in a really secure place.
• Or encrypt your mnemonic code using wallet password as a key and store it wherever you like. For that you can use AES-256 text encryption in Secret Space Encryptor which is a popular open source Android app.

Unconfirmed transactions
Here's a simple heuristic: treat any unconfirmed incoming transaction as if it does not exist yet. There are a lot of technical reasons for this and the rule applies to all wallets, not just to Simple Groestlcoin Wallet. Just wait for at least one confirmation and you'll be fine.

Transaction fees
Every transaction you send must have some fee attached to it. Fee goes not to wallet developer but to Groestlcoin miners who include transactions in blocks and thus give them confirmations. The higher fee you choose the faster transaction will be confirmed.

Wallet addresses
Due to privacy considerations wallet has not one but many addresses. In fact, wallet's default address gets changed on every new incoming transaction. Never worry about it as all the old wallet addresses stay valid forever and you can use any of them to receive funds.

In case you lose your password...
It's important to understand that Simple Groestlcoin Wallet is not a centralized service so you can't regain access to your funds by just providing an email or something like that. Here you'll need to restore a wallet using your mnemonic code and this is how to do it step by step:
1. Erase all current wallet data if you know how to do that (such an option is typically available in System Settings), otherwise just reinstall an application from scratch.
2. Open fresh application and you'll be given an option to restore your wallet instead of creating a new one, choose it and enter your mnemonic code as well as new wallet password.

It is appreciated if feedback of the following is provided:
1.  Can you receive coins? (small amounts to avoid losing them)
2.  Can you send coins?
3.  Can you scan a QR code from another phone.
4.  Can you request coins via email or other android service?
5.  How long does it take to sync the blockchain?
6.  How much space does it take up on your phone?
7.  Does it calculate exchange rates properly?
8.  Does the self-destruction function work properly?

This application is licensed under the GPL version 3. There is no warranty and no party shall be made liable to you for damages. If you lose coins due to this app, no compensation will be given. Use this app solely at your own risk.
Important note: restored wallet will appear empty at first and that is completely normal as it needs some time to catch up with network.

The application may have unfound bugs and problems. To leave feedback: 
1.  PM hashengineering on bitcointalk: https://bitcointalk.org/index.php?action=profile;u=155038
2.  Email: hashengineeringsolutions@gmail.com
3.  Reports of errors can also be posted in this topic.

Groestlcoin Wallet is available in the Google play store:
https://play.google.com/store/apps/details?id=hashengineering.groesltcoin.btcontract_wallet

Source code:
https://github.com/Groestlcoin/groestlcoinj - Groestlcoin Java Library (for the Android App and possibly other software)
https://github.com/GroestlCoin/btcontract-wallet - The Simple Groestlcoin Android Wallet Source code

[gruve_p]

Simple Groestlcoin is a standalone wallet for Blackberry devices which does not depend on any centralized service and gives you full control over your precious groestlcoins. Its main advantages over the original Groestlcoin Blackberry client include support for HD wallet.

Features
• A single-page application which allows you to store your Groestlcoins securely and transfer them easily.
• It is an HD wallet which means your balance and full transaction history can always be restored using a single mnemonic code should anything bad happen to your device.
• This wallet is intended for mobile devices, hence it does not store a full Blockchain but instead acquires all the relevant data from random groestlcoin nodes using an SPV technique.
• Self-Destruction functionality. Set up a secret code which you can use to self-destruct all wallet data. Use your mnemonic code to restore your wallet again.
• Open source under GPL v3 License
• Wallet only needs to be backed up once, on initial creation.
• Wallet backup consists of simple list of 12 common words (BIP-0039).
• No servers just the Groestlcoin network using the Groestlcoinj library.
• Simple and intuitive user interface.
• No worrying about losing private keys any more - use your "wallet words" (seed phrase) to restore them.

Mnemonic code
Simple Groestlcoin is a so called HD wallet: all Groestlcoin addresses and private keys come from a single mnemonic code which is essentially a phrase comprising of 12 random words. Please remember: whoever knows your mnemonic code also fully controls your Groestlcoins so it should be kept private at all times.
Also, in case if you lose your device or forget your wallet password only mnemonic code can get your Groestlcoins back, it's that important! Ideally one of the following actions should be taken once a new wallet is created:
• Either write your mnemonic code on a piece of paper and store it in a really secure place.
• Or encrypt your mnemonic code using wallet password as a key and store it wherever you like. For that you can use AES-256 text encryption in Secret Space Encryptor which is a popular open source Blackberry app.

Unconfirmed transactions
Here's a simple heuristic: treat any unconfirmed incoming transaction as if it does not exist yet. There are a lot of technical reasons for this and the rule applies to all wallets, not just to Simple Groestlcoin Wallet. Just wait for at least one confirmation and you'll be fine.

Transaction fees
Every transaction you send must have some fee attached to it. Fee goes not to wallet developer but to Groestlcoin miners who include transactions in blocks and thus give them confirmations. The higher fee you choose the faster transaction will be confirmed.

Wallet addresses
Due to privacy considerations wallet has not one but many addresses. In fact, wallet's default address gets changed on every new incoming transaction. Never worry about it as all the old wallet addresses stay valid forever and you can use any of them to receive funds.

In case you lose your password...
It's important to understand that Simple Groestlcoin Wallet is not a centralized service so you can't regain access to your funds by just providing an email or something like that. Here you'll need to restore a wallet using your mnemonic code and this is how to do it step by step:
1. Erase all current wallet data if you know how to do that (such an option is typically available in System Settings), otherwise just reinstall an application from scratch.
2. Open fresh application and you'll be given an option to restore your wallet instead of creating a new one, choose it and enter your mnemonic code as well as new wallet password.

It is appreciated if feedback of the following is provided:
1.  Can you receive coins? (small amounts to avoid losing them)
2.  Can you send coins?
3.  Can you scan a QR code from another phone.
4.  Can you request coins via email or other Blackberry service?
5.  How long does it take to sync the blockchain?
6.  How much space does it take up on your phone?
7.  Does it calculate exchange rates properly?
8.  Does the self-destruction function work properly?

This application is licensed under the GPL version 3. There is no warranty and no party shall be made liable to you for damages. If you lose coins due to this app, no compensation will be given. Use this app solely at your own risk.
Important note: restored wallet will appear empty at first and that is completely normal as it needs some time to catch up with network.

The application may have unfound bugs and problems. To leave feedback: 
1.  PM hashengineering on bitcointalk: https://bitcointalk.org/index.php?action=profile;u=155038
2.  Email: hashengineeringsolutions@gmail.com
3.  Reports of errors can also be posted in this topic.

Groestlcoin Wallet is available in the Blackberry World:
https://appworld.blackberry.com/webstore/content/59994342/

Source code:
https://github.com/Groestlcoin/groestlcoinj - Groestlcoin Java Library (for the Blackberry App and possibly other software)
https://github.com/GroestlCoin/btcontract-wallet - The Simple Groestlcoin Blackberry Wallet Source code