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341  Alternate cryptocurrencies / Altcoin Discussion / Re: Ixcoin TODO on: May 08, 2014, 12:52:45 AM
sounds good,  however we still have to fix that crashing problem that you currently have.  Let me know what you've found.
It hasn't crashed yet since the change but I haven't seen a filtering message yet. I'm monitoring the logs and when I get one of these without a crash following I think we can safely assume it is fixed.
342  Alternate cryptocurrencies / Altcoin Discussion / Re: Ixcoin TODO on: May 08, 2014, 12:41:03 AM
I like the merged mining.  I'll add 10,000 IXC to the bounty for the Ixcoin client upgrade.


You guys are forgetting about the above 10,000 IXC donation.  That's 15,000 IXC now.
mmpool.org can donate the remaining 10,000 IXC to help improve ixcoin. Friction, can you provide an ixcoin address and I'll send the coins.
343  Bitcoin / Pools / Re: [55 TH] mmpool.org - 1.5% fee split DGM/PPS - tx fees/vardiff/merge mining/tor on: May 06, 2014, 11:55:16 PM
The ixcoin daemon on the pool has been sporadically crashing. It was down for 5 hours earlier meaning withdrawals weren't possible. I've applied a possible fix and will monitor how it goes.
344  Alternate cryptocurrencies / Altcoin Discussion / Re: Ixcoin TODO on: May 06, 2014, 11:48:02 PM
The same 'filtered block' line (but different hash) in the last crash too. Perhaps something wrong with whatever filtered block handling is?

CMerkleBlock is used for filtered nodes. It holds a CBlockHeader. This is assigned in CMerkleBlock::CMerkleBlock using GetBlockHeader. This function doesn't copy the auxpow field. This is possibly why the null pointer accessing auxpow occurs. Possible fix:

Code:
diff --git a/src/main.h b/src/main.h
index bd21fe9..1221a88 100644
--- a/src/main.h
+++ b/src/main.h
@@ -1411,6 +1411,7 @@ public:
         block.nTime          = nTime;
         block.nBits          = nBits;
         block.nNonce         = nNonce;
+        block.auxpow         = auxpow;
         return block;
     }

I'll put this test in production and see what happens.
345  Alternate cryptocurrencies / Altcoin Discussion / Re: Ixcoin TODO on: May 06, 2014, 11:36:16 PM
This is going to be a tough one to crack.  Looks like a garbage collection problem!
Last entry in the debug.log before the crash was:

Code:
received getdata for: filtered block 84f28f4a2bd6d77ee604f5cb3849c0b28e3338d5567ed5a4bdafab3e3fe9dfb8

The same 'filtered block' line (but different hash) in the last crash too. Perhaps something wrong with whatever filtered block handling is?
346  Alternate cryptocurrencies / Altcoin Discussion / Re: Ixcoin TODO on: May 06, 2014, 10:57:42 PM
The pool had an ixcoin crash today:

Code:
boost/smart_ptr/shared_ptr.hpp:412: typename boost::detail::shared_ptr_traits<T>::reference boost::shared_ptr< <template-parameter-1-1> >::operator*() const [with T = CAuxPow]: Assertion `px != 0' failed. 

This is with the latest client.

Same crash  happened again today. The pool might have to go back to the older client.
347  Alternate cryptocurrencies / Altcoin Discussion / Re: Ixcoin TODO on: May 05, 2014, 07:37:24 AM
Well, if IXC took that algo from NameCoin then that answers my other question regarding highly skilled ghost programmers working on IXC.
The algorithm wasn't taken from Namecoin, it was changed to avoid the issues Namecoin was having. I think ixcoin ended up with solidcoin's algorithm but I may be wrong.
348  Alternate cryptocurrencies / Altcoin Discussion / Re: Ixcoin TODO on: May 05, 2014, 06:32:09 AM
Cause from everything I've read, iXcoin is exactly like Bitcoin except for the accelerated coin mining output.
It's a different algorithm. It was created to try and avoid the problems namecoin had with miners mining it while it was profitable and abandoning it when it wasn't. The difficulty would rise high then blocks would take weeks to be found due to all the miners leaving. Other coins used ixcoin's algorithm and then other different algorithm's came along. I'm not sure exactly which one ixcoin uses.
349  Alternate cryptocurrencies / Altcoin Discussion / Re: Ixcoin TODO on: May 05, 2014, 01:43:06 AM
Which pool?  I really hope it wasn't ghash.io.
mmpool.org. Does ghash use the latest ixcoin?
350  Alternate cryptocurrencies / Altcoin Discussion / Re: Ixcoin TODO on: May 04, 2014, 11:36:16 PM
The pool had an ixcoin crash today:

Code:
boost/smart_ptr/shared_ptr.hpp:412: typename boost::detail::shared_ptr_traits<T>::reference boost::shared_ptr< <template-parameter-1-1> >::operator*() const [with T = CAuxPow]: Assertion `px != 0' failed. 

This is with the latest client.
351  Bitcoin / Pools / Re: [55 TH] mmpool.org - 1.5% fee split DGM/PPS - tx fees/vardiff/merge mining/tor on: May 04, 2014, 11:30:37 AM
Block 299052 found by the pool. Finder was 6b98d33a earning the transaction fee as a bonus.
352  Bitcoin / Pools / Re: [55 TH] mmpool.org - 1.5% fee split DGM/PPS - tx fees/vardiff/merge mining/tor on: April 30, 2014, 01:04:41 PM
Hi guys, I've been asked to investigate what diff setting to use for 3Th/s... Does anybody have any links to a formula that can be used to work this out?
A difficulty of aproximately 1.4 per GHash/s is reasonable, rounded to a whole number. So if you have 10 Ghash/s you should use 14. If you have 1 Ghash/s use 1. For 3 TH/s that would be 4200.
353  Bitcoin / Pools / Re: [55 TH] mmpool.org - 1.5% fee split DGM/PPS - tx fees/vardiff/merge mining/tor on: April 26, 2014, 11:04:53 PM
Block 297832 found by user 97f7fb0c earning them 0.11128360 in transaction fees.
354  Alternate cryptocurrencies / Altcoin Discussion / Re: Ixcoin TODO on: April 25, 2014, 05:39:13 AM
Thanks!  Can you dig up which IXC block was mined by mmpool using the new client?

BTW, do you represent mmpool.org? 
Yes, I represent mmpool.org. See the contact page on the pool for confirmation. The last ixcoin block mined by the pool using the new client was block 200094.
355  Alternate cryptocurrencies / Altcoin Discussion / Re: Ixcoin TODO on: April 24, 2014, 02:29:04 PM
The main stumbling block right now is to have GHash.IO and the other pools accept the latest version of IXcoin.  The latest version enables Multi-Sig and OP_RETURN and we just need cooperation from the pool to get this deployed.
mmpool.org is using the latest IXcoin client and has mined a few blocks successfully using it. This can be a useful data point to mention to other pools if they are hesitating due to perceived lack of testing.
356  Bitcoin / Pools / Re: [55 TH] mmpool.org - 1.5% fee split DGM/PPS - tx fees/vardiff/merge mining/tor on: April 24, 2014, 01:06:15 AM
This is starting to become brutal. We need a way to get more miners. A neat idea might be taking and money from fee's and using it to buy/rent miners to mine at the site. This will increase our hashrate and then more users will want to come and then over time it will make you more money. Basically like a long term investment in the site.
Fees are earnt by the pool when a block is found. This is infrequent enough that the 0.375 bitcoins earnt in fees wouldn't buy much mining capability.
357  Bitcoin / Pools / Re: [55 TH] mmpool.org - 1.5% fee split DGM/PPS - tx fees/vardiff/merge mining/tor on: April 23, 2014, 01:57:32 AM
So close. We found a namecoin block in the last couple of hours but just short of a bitcoin block:

Code:
00000000000000009D8C00000000000000000000000000000000000000000000 <-- bitcoin target
00000000000000010ab100000000000000000000000000000000000000000000 <-- namecoin target
0000000000000000fb3d8a066e93d660f89196ad83981c323d885f13defac920 <-- hash found
358  Bitcoin / Pools / Re: [47 TH] mmpool.org - 1.5% fee split DGM/PPS - tx fees/vardiff/merge mining/tor on: April 09, 2014, 01:57:00 PM
You could give the extra payouts to the miners who have been there longer; that would work as a sort of referral program. If you get new people to join who are earning less than full PPS, then the existing miners get some benefit for finding new hash power to join the pool.
Length of time is a possibility but it becomes hard to differentiate between someone who jumped in and out of the pool over time. Maybe some form of fee discount/bonus for top share submitters over a rolling 24 hour (or whatever) period. With an option to include referred users share rate as part of yours to encourage referrals.

This would make mining a little competitive to increase share rates which would help encourage people to stick with it. An argument against this approach is "Why not apply that average discount across the board" so fees are lower and encourage people that way. I do like the competitive mining/reward referral aspect though.
359  Bitcoin / Pools / Re: [47 TH] mmpool.org - 1.5% fee split DGM/PPS - tx fees/vardiff/merge mining/tor on: April 09, 2014, 01:05:59 PM
Why would people withhold blocks, though? I mean, it doesn't hurt them, but it doesn't help them in any way, either. It's just being a dick.
Imagine a pool that is PPS only. Miners don't need to send solutions that solve blocks at all as they get paid per share. In fact they are incentivized not too. If blocks are found, difficulty increases and mining gets harder. So by not submitting the winning block they prevent difficulty from rising just that little bit. And they still get paid. It's win-win for them. Terrible for the pool of course. So it's also a useful attack to kill a rival pool.
360  Bitcoin / Pools / Re: [47 TH] mmpool.org - 1.5% fee split DGM/PPS - tx fees/vardiff/merge mining/tor on: April 09, 2014, 04:32:00 AM
Have you had any progress on the problem with stratum proxies?
Not yet, it's my current task however.
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