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

[bee7]

hmm, looks like my wallet is on a fork...

If it is really on fork, I would appreciate if you zip the debug.log, blk0001.dat and txleveldb folder of your %appdata%/Grain folder before you do resync and share the zipped data with me so I could try to see why it happened.

[Miner-TE]

Is the chain moving?

I have...
5 connections
Current number of blocks 726796
Last block time Tue Jun 17 09:49:30 2014


11:43:24

getpeerinfo


11:43:24

[
{
"addr" : "176.195.30.180:11054",
"services" : "00000001",
"lastsend" : 1403030604,
"lastrecv" : 1403030604,
"conntime" : 1403021884,
"version" : 60006,
"subver" : "/Grain:1.5.0/",
"inbound" : false,
"releasetime" : 0,
"startingheight" : 699209,
"banscore" : 0
},
{
"addr" : "94.255.70.6:55956",
"services" : "00000001",
"lastsend" : 1403030016,
"lastrecv" : 1403030016,
"conntime" : 1403022040,
"version" : 60006,
"subver" : "/Grain:1.5.0/",
"inbound" : true,
"releasetime" : 0,
"startingheight" : 699211,
"banscore" : 0
},
{
"addr" : "50.197.11.193:53823",
"services" : "00000001",
"lastsend" : 1403029698,
"lastrecv" : 1403029698,
"conntime" : 1403022118,
"version" : 60006,
"subver" : "/Grain:1.5.0/",
"inbound" : true,
"releasetime" : 0,
"startingheight" : 676543,
"banscore" : 0
},
{
"addr" : "73.179.37.179:51826",
"services" : "00000001",
"lastsend" : 1403030370,
"lastrecv" : 1403030370,
"conntime" : 1403026768,
"version" : 60006,
"subver" : "/Grain:1.5.0/",
"inbound" : true,
"releasetime" : 0,
"startingheight" : 676543,
"banscore" : 0
},
{
"addr" : "91.90.15.131:53233",
"services" : "00000001",
"lastsend" : 1403028993,
"lastrecv" : 1403028993,
"conntime" : 1403028992,
"version" : 60007,
"subver" : "/Grain:1.6.0/",
"inbound" : true,
"releasetime" : 0,
"startingheight" : 724759,
"banscore" : 0
}
]

[bee7]

Is the chain moving?

I have...
5 connections
Current number of blocks 726796
Last block time Tue Jun 17 09:49:30 2014


11:43:24

getpeerinfo


11:43:24

[
{
"addr" : "176.195.30.180:11054",
"services" : "00000001",
"lastsend" : 1403030604,
"lastrecv" : 1403030604,
"conntime" : 1403021884,
"version" : 60006,
"subver" : "/Grain:1.5.0/",
"inbound" : false,
"releasetime" : 0,
"startingheight" : 699209,
"banscore" : 0
},
{
"addr" : "94.255.70.6:55956",
"services" : "00000001",
"lastsend" : 1403030016,
"lastrecv" : 1403030016,
"conntime" : 1403022040,
"version" : 60006,
"subver" : "/Grain:1.5.0/",
"inbound" : true,
"releasetime" : 0,
"startingheight" : 699211,
"banscore" : 0
},
{
"addr" : "50.197.11.193:53823",
"services" : "00000001",
"lastsend" : 1403029698,
"lastrecv" : 1403029698,
"conntime" : 1403022118,
"version" : 60006,
"subver" : "/Grain:1.5.0/",
"inbound" : true,
"releasetime" : 0,
"startingheight" : 676543,
"banscore" : 0
},
{
"addr" : "73.179.37.179:51826",
"services" : "00000001",
"lastsend" : 1403030370,
"lastrecv" : 1403030370,
"conntime" : 1403026768,
"version" : 60006,
"subver" : "/Grain:1.5.0/",
"inbound" : true,
"releasetime" : 0,
"startingheight" : 676543,
"banscore" : 0
},
{
"addr" : "91.90.15.131:53233",
"services" : "00000001",
"lastsend" : 1403028993,
"lastrecv" : 1403028993,
"conntime" : 1403028992,
"version" : 60007,
"subver" : "/Grain:1.6.0/",
"inbound" : true,
"releasetime" : 0,
"startingheight" : 724759,
"banscore" : 0
}
]

Yes, it is moving. It seems I need to make a release that bans v1.5 nodes from the network: they don't care to update for half a month, then why we should spend our bandwidth to talk to them?

Try to stop the wallet, remove the peers.dat file, then start the wallet again.

[Miner-TE]

That did the trick.  Working again.

Thanks.

[bee7]

Important!

There are issues with network. Please hold off transfers and PoW minting until further notice.

[bee7]

Please update the wallet.

http://sourceforge.net/projects/graincoin/files/v1.6/graincoin-1.6.1.0-win32.zip/download

the links in the OP and source at github are updated.

Still hold off with transfers and PoW minting: let the network recover, please.



Hold off with update please. I need some more time to analyse the data I succeeded to get.

[bee7]

Status update:

First, a small explanation what happened. At some point a node generated the block that had quite high trust score but were not propagated fast enough through the network. Some nodes accepted it but others rejected due to diff adjustment limiting filter that is originally designed to prevent the flooding of the network with blocks having too big PoW/PoS (the smaller the value the more work is required to produce a block). Originally, when a node receives such a block then it bans the sending peer immediately for 24h by default. So the net got split in two parts (or more). Then these parts live isolated for 24 hours and grow their own forks.

In 1.6.1 I removed this banning of a peer to maintain the network connected anyway and some other small fixes that I hoped would solve the problem. Apparently it did not help as some nodes remains stick to their forks even after they got reconnected with other nodes.

Thanks to the data kindly provided by harveyweizhao I analyzed the states of two forks and found the problem that keeps it from switching to the proper fork automatically.

Atm I am testing the fix and I am planning to release the 1.6.2 tomorrow or day after tomorrow. I still warn you not to make any transfers until you update to 1.6.2. The both exchanges were notified timely so they stopped the daemons. As soon as I see that the net is recovered after 1.6.2 deployment I will ask them to restore the services.

Stay tuned.

[bondi]

Status update:

First, a small explanation what happened. At some point a node generated the block that had quite high trust score but were not propagated fast enough through the network. Some nodes accepted it but others rejected due to diff adjustment limiting filter that is originally designed to prevent the flooding of the network with blocks having too big PoW/PoS (the smaller the value the more work is required to produce a block). Originally, when a node receives such a block then it bans the sending peer immediately for 24h by default. So the net got split in two parts (or more). Then these parts live isolated for 24 hours and grow their own forks.

In 1.6.1 I removed this banning of a peer to maintain the network connected anyway and some other small fixes that I hoped would solve the problem. Apparently it did not help as some nodes remains stick to their forks even after they got reconnected with other nodes.

Thanks to the data kindly provided by harveyweizhao I analyzed the states of two forks and found the problem that keeps it from switching to the proper fork automatically.

Atm I am testing the fix and I am planning to release the 1.6.2 tomorrow or day after tomorrow. I still warn you not to make any transfers until you update to 1.6.2. The both exchanges were notified timely so they stopped the daemons. As soon as I see that the net is recovered after 1.6.2 deployment I will ask them to restore the services.

Stay tuned.

Thanks for the update.

[bee7]

The Graincoin wallet v1.6.2 released, the download links in the OP are updated.

Please update. There is no deadline, but for the sake of network stability please do it as soon as you have time for it. Also, I would like to remind you that the blockchain data is available for direct download (currently it has 750k blocks included).

[alm]

Thanks for a new release!
Please make the CoinControl support. It is would be very helpful thing. 

[harveyweizhao]

Thank you so much for update of 1.6.2!

[bee7]

Thank you so much for update of 1.6.2!

Thank you for the data

[bee7]

AltCoin Auctions now accepts Graincoin!

[bondi]

AltCoin Auctions now accepts Graincoin!

Nice.
Hope we can spread Grain usage...

[bee7]

Sad news. Coinedup removed Grain markets. They asked to withdraw balances, but their Graincoin wallet is offline. I send the e-mail to make them solve the issue. However, I did not got a single response from Coinedup for all my previous requests, so let's see if this works this time.

[bondi]

Sad news. Coinedup removed Grain markets. They asked to withdraw balances, but their Graincoin wallet is offline. I send the e-mail to make them solve the issue. However, I did not got a single response from Coinedup for all my previous requests, so let's see if this works this time.

Coinedup didn't play fair when they put the 100.000GRA withdraw limit. I think we need to move to another exchange but of course it's easier said than done. 
We need to find some good marketing people that believe in Grain...
How's things going on the development front? Any new features coming up?

[bee7]

Sad news. Coinedup removed Grain markets. They asked to withdraw balances, but their Graincoin wallet is offline. I send the e-mail to make them solve the issue. However, I did not got a single response from Coinedup for all my previous requests, so let's see if this works this time.

Coinedup didn't play fair when they put the 100.000GRA withdraw limit. I think we need to move to another exchange but of course it's easier said than done. 
We need to find some good marketing people that believe in Grain...
How's things going on the development front? Any new features coming up?

We are listed on swissex, so Coinedup removal is not a biggest problem. May be it is even an advantage, as their level of customer support is awful IMO. As for development, I am looking into other coins achievements and innovations to not invent the wheel from one hand and not to just copy-n-paste: we need some really unique innovation to push the Grain up. The main goal is to implement the anonymity, of course.

Also I am considering to switch the hashing function as someone proposed: the scrypt is very energy-inefficient in terms of GPU-mining compare to other existing algos, so I am in the process of testing different existing combinations to pick the most energy efficient, from one hand, and having questionable feasibility to be implemented in hard silicon in the nearest future, from the other hand.

[bondi]

Sad news. Coinedup removed Grain markets. They asked to withdraw balances, but their Graincoin wallet is offline. I send the e-mail to make them solve the issue. However, I did not got a single response from Coinedup for all my previous requests, so let's see if this works this time.

Coinedup didn't play fair when they put the 100.000GRA withdraw limit. I think we need to move to another exchange but of course it's easier said than done. 
We need to find some good marketing people that believe in Grain...
How's things going on the development front? Any new features coming up?

We are listed on swissex, so Coinedup removal is not a biggest problem. May be it is even an advantage, as their level of customer support is awful IMO. As for development, I am looking into other coins achievements and innovations to not invent the wheel from one hand and not to just copy-n-paste: we need some really unique innovation to push the Grain up. The main goal is to implement the anonymity, of course.

Also I am considering to switch the hashing function as someone proposed: the scrypt is very energy-inefficient in terms of GPU-mining compare to other existing algos, so I am in the process of testing different existing combinations to pick the most energy efficient, from one hand, and having questionable feasibility to be implemented in hard silicon in the nearest future, from the other hand.

As for the algos you're talking about something like X11?

[bee7]

Sad news. Coinedup removed Grain markets. They asked to withdraw balances, but their Graincoin wallet is offline. I send the e-mail to make them solve the issue. However, I did not got a single response from Coinedup for all my previous requests, so let's see if this works this time.

Coinedup didn't play fair when they put the 100.000GRA withdraw limit. I think we need to move to another exchange but of course it's easier said than done. 
We need to find some good marketing people that believe in Grain...
How's things going on the development front? Any new features coming up?

We are listed on swissex, so Coinedup removal is not a biggest problem. May be it is even an advantage, as their level of customer support is awful IMO. As for development, I am looking into other coins achievements and innovations to not invent the wheel from one hand and not to just copy-n-paste: we need some really unique innovation to push the Grain up. The main goal is to implement the anonymity, of course.

Also I am considering to switch the hashing function as someone proposed: the scrypt is very energy-inefficient in terms of GPU-mining compare to other existing algos, so I am in the process of testing different existing combinations to pick the most energy efficient, from one hand, and having questionable feasibility to be implemented in hard silicon in the nearest future, from the other hand.

As for the algos you're talking about something like X11?

Yes. I am not sure it would be exactly X11 as I did not make its performance/power consumption test yet. As the memory-intensive algorithms are not the barrier anymore for ASIC developers, I would prefer not to use anything memory-dependent that makes GPU mining two times more expensive according to my tests.

[coinschaer]

Sad news. Coinedup removed Grain markets. They asked to withdraw balances, but their Graincoin wallet is offline. I send the e-mail to make them solve the issue. However, I did not got a single response from Coinedup for all my previous requests, so let's see if this works this time.

Coinedup didn't play fair when they put the 100.000GRA withdraw limit. I think we need to move to another exchange but of course it's easier said than done. 
We need to find some good marketing people that believe in Grain...
How's things going on the development front? Any new features coming up?

We are listed on swissex, so Coinedup removal is not a biggest problem. May be it is even an advantage, as their level of customer support is awful IMO. As for development, I am looking into other coins achievements and innovations to not invent the wheel from one hand and not to just copy-n-paste: we need some really unique innovation to push the Grain up. The main goal is to implement the anonymity, of course.

Also I am considering to switch the hashing function as someone proposed: the scrypt is very energy-inefficient in terms of GPU-mining compare to other existing algos, so I am in the process of testing different existing combinations to pick the most energy efficient, from one hand, and having questionable feasibility to be implemented in hard silicon in the nearest future, from the other hand.

As for the algos you're talking about something like X11?

Yes. I am not sure it would be exactly X11 as I did not make its performance/power consumption test yet. As the memory-intensive algorithms are not the barrier anymore for ASIC developers, I would prefer not to use anything memory-dependent that makes GPU mining two times more expensive according to my tests.

I think when the Algo get´s changed we need something really new to get the attention of the cryptomunity. I think the people dont really care about the enregy but are interested in everything new and i don´t know a coin using cuckoo cycle so i think it´s worth to take a look at.