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1  Bitcoin / Pools / Tx fees on the rise - make sure you get paid on: September 29, 2016, 04:07:17 PM
https://twitter.com/oocBlog/status/781259179470249984

Mining income from transaction fees is becoming important.

You think you are mining PPS with a 3% fee? When the pool doesn't pay out transaction fee income, the actual fee is over 6% !
Mining PPLNS with 0% fee but no tx fee payout? You are actually paying a 3.1% fee.

A new block now has 12.5 new bitcoins and an average 0.4 BTC from transaction fees. An average mining income of 12.9 BTC per block. The 0.4 BTC is 3.1% of this.

Tx fee income will likely be even more than 3.1% in the near future. Check your pool's reward conditions today.

P.S. If you mine at a pool that frequently mines empty blocks, then there will of course also be reduced income from transaction fees, even if they are paid out.
2  Bitcoin / Pools / How do you prefer to log in? on: December 07, 2014, 01:10:33 AM
How would you prefer to log in at your mining pool's website?

Please take part in the poll above.
3  Bitcoin / Pools / Bitminter bitcoin mining pool - Pays TxFees, Merged Mining, Fair PPLNS rewards on: September 19, 2014, 04:20:53 PM


Mint new bitcoins at the Bitminter mining pool!

Why you want to join us:
  • A brand you can trust, serving your mining needs since 2011
  • Over 440 000 total users since launch
  • Merged mining - free namecoins with your bitcoins, without slowing your bitcoin mining
  • We pay income from transaction fees in addition to the freshly minted coins
  • 99% of mining income paid out
  • Under continuous development and improvement

Joining us takes seconds:
  • 1. Choose a user name to sign up at https://bitminter.com/signup
  • 2. Point your miner to mint.bitminter.com:3333 with your user name and a dummy (x or 123) password
  • 3. Profit
4  Bitcoin / Development & Technical Discussion / Malleability in a nutshell on: February 11, 2014, 11:02:23 PM
Me: I'd like to send some coins.
bitcoind: Sent in transaction ABC123.
Me: How is transaction ABC123 doing? Any confirmations yet?
bitcoind: Are you making things up? There's no such transaction.
Me: Huh

(The transaction did go through but is now called XYZ789)

Now you have two options:

A) Bitcoin isn't perfect, but we can make it better.

B) Bitcoin is perfect. You are the problem. YOU'RE STUPID!

I see many people already chose attitude B.

It's the wrong choice.
5  Local / Skandinavisk / Ny uttalelse fra norske myndigheter on: December 16, 2013, 07:02:29 PM
http://www.coindesk.com/norway-bitcoins-defined-as-money/

Noen som har sett originalen, som omtales der?
6  Bitcoin / Pools / [Race is over!] Mint Race #5: Win a KnC Jupiter 550 GH/s ASIC device! on: October 30, 2013, 09:31:49 PM
The first KnC Jupiter that has been earned through the reseller link at Bitminter will be the prize for the november mint race! Note that we don't know when these reseller units will be shipping. More information on that when the information is available from KnC. You can read more about the Jupiter device at https://www.kncminer.com/?resellerid=299 (also use that link to buy!)

Got 5% of the pool hashrate? That's a 5% chance to win 1st place. Even for smaller miners the chances should be better than most lotteries.

The race is open for everyone. All you have to do is mine at the Bitminter mining pool.

Start: friday 2013.11.01 at 00:00 UTC
Finish: saturday 2013.11.30 at 23:59 UTC

The prizes are:

1st place: KnCMiner Jupiter 550 GH/s ASIC device (currently selling for $4995)
2nd place: BTC Trinkets bitcoin miner lapel pin
3rd place: BTC Trinkets bitcoin miner lapel pin





Update: added bitcoin miner pins. Thanks, BTC Trinkets! More details on the pins at http://btctrinkets.com/presta2/index.php?id_product=26&controller=product

Rules:
  • Just like your hash must beat the difficulty to produce a block, it must beat the other miners to win. The best (lowest) hashes during the race will win.
  • As long as your work is accepted by the server it is valid for the race, even if it ends up "stale" or "orphaned" in the block list.
  • Each person can only compete with one (their best) hash.
  • If a winner cannot be reached within 1 week, the prize will go to the next on the list. You may want to make sure that the "account details" page at bitminter.com has an email address listed for you so that you are easy to reach.
  • Any block by DrHaribo will not count in the race.

Verifiability:
Hopefully your mining software will show if you have created a block (BitMinter client does). Your block will show with your user name in the block list at http://bitminter.com/blocks. You can click the height number for the block (leftmost column) to see details. There is a link there to blockchain.info where you can see the hash value of the block both on the page and in the URL. The lowest hash value wins. Hash values are shown in hexadecimal. 0-9 is lower than A-F. A is lower than B. Pretty simple.

CURRENT STANDINGS: see https://bitminter.com/mintrace
7  Bitcoin / Pools / (finished) Mint Race #4: great prizes from CloudHashing.com ! on: June 21, 2013, 05:59:04 PM
To celebrate CloudHashing.com starting up and BitMinter turning 2 (launch date 2011.06.26), we are holding another mint race. And CloudHashing has some really awesome prizes for the winners! The race takes place at the BitMinter mining pool. All you need to do is mine. The rules are like for previous mint races (#1, #2, #3) but the race will last a full week.

Start: sunday 2013.06.23 at 20:00 UTC
Finish: sunday 2013.06.30 at 20:00 UTC

The prizes are discounts at CloudHashing.com:

1st place: $1000 off when you spend $1500
2nd place: $500 off when you spend $949.95
3rd place: $250 off when you spend $949.95
4-10th place: $100 off when you spend $495

So if you win first prize you can pay $500 for $1500 worth of mining contracts.

Terms:
Discount codes are transferable if you want to give it away or sell it, rather than spend it yourself.
Discount codes valid for 2 months.

Rules:
  • Just like your hash must beat the difficulty to produce a block, it must beat the other miners to win. The best (lowest) hashes during the race will win.
  • As long as your work is accepted by the server it is valid for the race, even if it ends up "stale" or "orphaned" in the block list.
  • Each person can only compete with one (their best) hash.
  • If a winner cannot be reached within 1 week, the prize will go to the next on the list. You may want to make sure that the "account details" page at bitminter.com has an email address listed for you so that you are easy to reach.
  • Any block by CloudHashing or DrHaribo will not count in the race.

Verifiability:
Hopefully your mining software will show if you have created a block (BitMinter client does). Your block will show with your user name in the block list at http://bitminter.com/blocks. You can click the height number for the block (leftmost column) to see details. There is a link there to blockchain.info where you can see the hash value of the block both on the page and in the URL. The lowest hash value wins. Hash values are shown in hexadecimal. 0-9 is lower than A-F. A is lower than B. Pretty simple.

FINAL RESULTS:

PlaceNameHash (lower is better)
1 primaxbits 00000000000000048AA4BE0AD0E6DFAD13C87720A505F6EC21904F25C28F2E65
2 Fefox 000000000000000940BD68E51A7768FA9F100DD73C88BA43D73F1CE59BD588ED
3 micheletegon 0000000000000015D22104F993AB6DCCA74A303A7B9CC787588B6A56F0828909
4 hellerstern66 0000000000000021483F78F4B3BAF6819E4D931CE62EFB389AF3A0447E5CB1EB
5 SilentSonicBoom 0000000000000024881EE805A0486982230F8845FF650C39E7C5B61E7740A03A
6 bithog 0000000000000025CBDDB9D80DDFC85C8624315CAEFF7C134358027670D31863
7 fpga1 0000000000000027FAB86E15AB9F7F3C68238176EF04935772F4804174FC326E
8 Boomz 000000000000002A82BAC06017210722D698619988AB04F7229DA0E4292A9849
9 drradkin 000000000000002F6EBD798AE0F9AE0807AB96005F0B11A3B3BBF936527DA21B
10 forrestv 000000000000003B77F4DF781FFADF7333AC7144B04032FEE06C05FCE784020C
--------- no prizes below this point ---
11 MarcelM 00000000000000403D54CF421DDF94E7DCE837CEA322AC17A607F49BF7A6286E
12 1849dreams 0000000000000042E3C97EFCECF4790CA709ADFCC2A1D95E95A9C79C365DA52D
13 F90kX 0000000000000054C5C03DF20528247CF7F6C55F6A15C9C6EA43C4F7C6808FFE
14 xkrikl 0000000000000057CBC7CDEFB640F62110A49D2326A454F80F8DA6CB5FB3410E
15 Dagger75 0000000000000067D269F814A031903ACCF2540BE1CA14A46BBCAB9CA26E4AF3
16 Xollo 000000000000006DAFA677D6FD820721DC25619FF09367E9428FB8D67642CB90
17 hrofat 000000000000007053C8715CF241D43FE561CEFB43CB1B08F20EEE3799AA66C8
18 jocampo 00000000000000717FC845F9A933BD30A71243BD062EF8E8BFEAF2DF0A02A51C
19 fpgabtc 00000000000000736A1CCF23F2C8F6E944DC054D2D123BCD8771461636AD2FE3
20 greenminer01 0000000000000074E01E4905E6674C7B54DA3BC1230537658FB5035765B5FD56
21 lancsq 000000000000007902C84D31FB5EF67CF583832ECF6701D37D9655F30E6496F6
22 farfie 000000000000007FBAAEA0205C25B629F71885D221ECDC0C8CABD029FFC7CF26
23 solari 0000000000000080B1F4C4F141443DC8D2F98E4B3CC7028EEF80FB8CC2A14283
24 harkoner 0000000000000087CD471CFD392EABE17B691BF2EE233B2B117A6683E828FAB1
25 AmiralPsiko 000000000000008AF231C6BE417EFA785F3BC2FCCCBD1C500073897AE0952E67
26 jerrylittlemars 000000000000008E2C84951A6AAA736113BD7B5E987F9B057CC7D282B6516501
28 daryl001 000000000000009736CA5C5076282E2AA934EEA809096E0F952562B16F948F88
27 forrestv 00000000000000A153C32E46A76951881F18B31161FBCD99355FC64AC0878679
29 rbatista204 00000000000000A176408B2E08154FB59BB6D46150CF264D62C94B0CA2E3787A
30 griffingoodwest 00000000000000AA87CB058B0E89365A86A260E3F587BBA97F95AC28AE88C5DF
31 pszalwinski 00000000000000AC5C759191E4552FC066FCA215043FF103FB80212B200DDE7C
32 streblo 00000000000000B6E84F108291CBD5A915EC1E1F03667A1BFB5CE147753D14ED
33 Gadmaster 00000000000000B705F93D9561F551D24CF711C412322D296EB87177E68740BE
34 akotevski 00000000000000C80DD61E74E069ED72282995E01462216C7AAF9B613D880B5B
---BTC target00000000000000C94E0000000000000000000000000000000000000000000000

Updated 2013.06.30, 20:13 UTC
8  Bitcoin / Pools / BitMinter audit (or: PPLNS vs PPS) on: May 10, 2013, 06:15:38 PM
Recent bad luck at BitMinter had some miners worried, or even moving to pools with high fees, no transaction fee income, and no namecoin income, because they felt it would be more profitable than the bad luck at BitMinter, which they thought was so bad it must be more than bad luck, a bug of some sort.

I commissioned organofcorti to do a detailed analysis based on hard facts:

http://organofcorti.blogspot.com/2013/05/131-bitminter-and-luck.html

We did indeed have bad luck lately, but take note of this: our payouts beat most pools even when we have bad luck! And even without counting the income from namecoins, which is almost 8% extra income at the moment!

So if you are paying high fees (3+ %) for PPS mining in a pool that doesn't even pay out transaction fee income or namecoins, then you really have to ask yourself:

Instead of sometimes high and sometimes low pay, did you choose to get extra-low pay consistently every day because it feels safer? Yes, you are guaranteed to never have a decent payout ever. You are safe from that. Although you did get rid of the element of luck, I don't think this is really what you wanted.

Thanks to organofcorti for a very detailed analysis. If you need to make sense out of numbers, he's the man for the job.

TLDR; when we have bad luck, PPS miners are sad. When we have good luck, PPS miners cry.  Grin
9  Alternate cryptocurrencies / Altcoin Discussion / Earn 13% more mining income with namecoins on: April 03, 2013, 06:29:05 PM
Namecoin difficulty is 1/6th of Bitcoin difficulty. Namecoins are currently 50 coins per block versus 25 for Bitcoin. So in a merged mining pool you should on average make 12 namecoins for every bitcoin you mine. Namecoins are selling for 0.011 BTC now, see for example the btc-e exchange

12 x 0.011 = 0.132

Yes, you earn 13% extra on a merged mining pool. Shocked

Try BitMinter today!  Cool No fees, donations optional. Income from transaction fees are also paid out for an additional 1% to 2% extra.

If you are losing 14-15% at your current pool PLUS paying fees on top of that, you may want to reconsider. Total fees 15-20% ? Just say no.
10  Bitcoin / Pools / (finished) Mint Race Weekend #3, win BTC trinkets! on: October 27, 2012, 02:38:47 PM
BTC trinkets (Isokivi @ bitminter and bitcointalk) is kindly offering some very nice trinkets for a third Mint Race on BitMinter. It will be similar to the first and second mint races. The finest quality minting work (lowest hash value) will win.

Start: friday 2012.11.02 at 20:00 UTC
Finish: sunday 2012.11.04 at 20:00 UTC

Prizes:
1st place: Bitcoin cufflink pair + 5 BTC
2nd place: Bitcoin tiepin + 3 BTC
3rd place: Bitcoin lapel pin + 2 BTC

Currently cufflinks are selling for 3.25 BTC, a tiepin for 2.5 BTC and the lapel pins for 2 BTC. You can see pictures here: https://bitcointalk.org/index.php?topic=120686

If you don't win you can of course still buy the items you want. See the link above for more information.

Rules:
  • Just like your hash must beat the difficulty to produce a block, it must beat the other miners to win. The best (lowest) hashes during the race will win.
  • As long as your work is accepted by the server it is valid for the race, even if it ends up "stale" or "orphaned" in the block list.
  • Each person can only compete with one (their best) hash.
  • If a winner cannot be reached within 1 week, the prize will go to the next on the list. You may want to make sure that the "account details" page at bitminter.com has an email address listed for you so that you are easy to reach.
  • Any block by Isokivi or DrHaribo will not count in the race.

Verifiability:
Hopefully your mining software will show if you have created a block (BitMinter client does). Your block will show with your user name in the block list at http://bitminter.com/blocks. You can click the height number for the block (leftmost column) to see details. There is a link there to blockchain.info where you can see the hash value of the block both on the page and in the URL. The lowest hash value wins. Hash values are shown in hexadecimal. 0-9 is lower than A-F. A is lower than B. Pretty simple.

FINAL STANDINGS:

PlaceNameHash (lower is better)
1 Digigami 0000000000000024f7e67508287d9d7c39d2c9f3fc5309368f66c4f4d5f76376
2 narousberg 000000000000002929f0d3efbc15c32dda3d76936b7c7a837cbf749474f5c441
3 MashRinx 00000000000000386926366f2f0a3777171eff1ac39e32817f08f8ec06c7c328
--------- no prizes below this point ---
4 nats989 000000000000004055b1ca47e8ec80ac275db29142d5edf1e65a680f03dfee37
5 Zubilica 0000000000000063d7749dc1b01b55bb3c59c41f6d5093d8ae1c36c268fcdf35
6 darkice 00000000000000f3bab41e5119676da24346f740480dd01d9eb811dc4667d31b
7 amazingrando 000000000000010ffca22c51f7742225ff50d3d4bc12b26841ff1f26b5d7f23d
8 micheletegon 000000000000012e75d835d232050cf42f7a250846cd544fbd97d4d6b1079f9a
9 WhitePhantom 0000000000000237dcd683185c3511876b1b110b4e84d9c995bc2e1563ab42ea
10 Ferdinand 000000000000026f0cb6808bc6206e8d5c59bb12064e586ccba3bf9e713212f9
11 solari 000000000000028cdf816e497e86bceddfc5a4c41041e49f70497722d7c69885
12 deBaer 00000000000002bf9cad2d0ff8369366ee0a9ac6d665c3a979f39ef6014c14ef
13 jddebug 0000000000000310bd3fc594915eceb8d630f170e70d97a54d0839aa022333ee
14 dynasty 0000000000000317b8d87c959c565ba6e2f6b7e5fbac0b05b039249915faeba0
15 cdb000 000000000000038138455e723ca97d2d8623b0beadccd56408a6ef08be0b82cb
16 xxx 00000000000003bfe6f173d231d8acabd3ea8b39485b654349cc9ec6eacb933a
17 duckquack 000000000000041285fb08076fee59f783497efb3b7e9d4eed1b412c5bd6099a
18 jddebug 000000000000044f4bd38d48f8f1a2ad42430157bce97e3e48dec8b8aca00715
19 Fefox 00000000000004551a25d8f102471164fbef3b0c5c51802f105f31d4a5096cd7
20 wickedxxl 00000000000004bac759b520ced9a51a85cd798e7f7e3a9a56f0f10e2ae761b0
21 thph 00000000000004bdf624297fb99d49d3231a370ccad042b5a4d0d789a1237f79
---BTC target0000000000000513c50000000000000000000000000000000000000000000000

Updated 2012.11.04, 17:00 UTC
11  Bitcoin / Pools / Win Bitcurex card + 5 BTC: Race for BitMinter block no. 1000 (race is over!) on: September 19, 2012, 10:39:54 AM
The race is now over. Winner: Entropy Smiley

BitMinter is approaching 1000 bitcoin blocks. Whoever creates block no. 1000 will receive a Bitcurex card and 5 BTC. The Bitcurex card is a VISA card you can use to cash out from the Bitcurex exchange after selling bitcoins.

Block list available here:
http://bitminter.com/blocks

Bitcoin block at height 199506 by amazingrando is the pool's 988th BTC block.

We'll ignore the stale/orphan status, all blocks on the list will count.

A thousand blocks is a nice milestone for the pool. Thanks to btc196 for suggesting a competition. May the best minter win! Smiley

The 5 BTC will be deposited directly in the winner's BitMinter account. For the Bitcurex card we need to get in touch with the winner. Please make sure you have an email address registered on your BitMinter account (see the "account details" page).

The home stretch:
gigavps got block no. 989
WhitePhantom got block no. 990
Entropy got block no. 991
Entropy got block no. 992
dooferorg got block no. 993
geeojr got block no. 994
btc196 got block no. 995
mybtc1 got block no. 996
micheletegon got block no. 997
bitcoinminer got block no. 998
gazza got block no. 999
Entropy is the winner, block no. 1000 on the BitMinter pool !
12  Bitcoin / Pools / (finished) Mint Race Weekend #2, BCC cards from Bitcurex! on: August 28, 2012, 10:20:11 PM
Mint race #2 is over. Congratulations to the winners!

Bitcurex is kindly offering their BCC cards as prizes for a second Mint Race on BitMinter. It will be similar to the first mint race. The finest quality minting work (lowest hash value) will win.

Start: friday 31.08.2012 at 20:00 UTC
Finish: sunday 02.09.2012 at 20:00 UTC

Prizes:
1st place: Bitcurex BCC card + 5 BTC
2nd place: Bitcurex BCC card + 3 BTC
3rd place: Bitcurex BCC card + 2 BTC
4th through 10th place: Bitcurex BCC card

Total value is about 38.7 BTC (price, as of this writing, is 2.87 BTC per BCC card)

If you win a Bitcurex card you can choose the currency (USD, EUR or GBP). If you don't win you can of course still buy a card from https://shop.bitcurex.com. You can sell bitcoins on Bitcurex and withdraw your money (USD, EUR or GBP) through the BCC card. Thanks to Bitcurex for sponsoring the Mint Race. You can read more about them at https://bitcurex.com and https://shop.bitcurex.com.

Win conditions:
  • Just like your hash must beat the difficulty to produce a block, it must beat the other miners to win. The best (lowest) hashes during the race will win.
  • As long as your work is accepted by the server it is valid for the race, even if it ends up "stale" or "orphaned" in the block list.
  • Each person can only compete with one (their best) hash.

Verifiability:
Hopefully your mining software will show if you have created a block (BitMinter client does). Your block will show with your user name in the block list at http://bitminter.com/blocks. You can click the height number for the block (leftmost column) to see details. There is a link there to blockchain.info where you can see the hash value of the block both on the page and in the URL. The lowest hash value wins. Hash values are shown in hexadecimal. 0-9 is lower than A-F. A is lower than B. Pretty simple.

FINAL RESULTS:

PlaceNameHash (lower is better)
1 Isokivi 000000000000007FE04B5867A04D88FAC07F314B2157FFDE65FE841CBE276E11
2 PasProfeta 00000000000000E2292F2798A1D277E42C08D67138B5F142937CA2DC96916011
3 salcox 000000000000012FE112E6FD081B6E4CF2713C2EB28BB9CD9E890CB42795B83A
4 darkice 00000000000001BD5F0F7AEBCA6640E4B7EDCEA81497438C46CCA38D2C619C8A
5 gigavps 000000000000024C8DE303E240DDDA8612DE3E0FB6D282783DDAFF309D50E866
6 Fefox 0000000000000277C7D84C74A82E624662305DCACA1F62332167303842123639
7 WhitePhantom 000000000000028FE9E42B3D05A1ADDBAAEB592DA8C2F03107333A0B3789DB31
8 slipbye 000000000000035132ED7900B22D1CF41308CCBD066FEF3BDD3CFBDB9B1AF797
9 gazza 000000000000042047C86D261109FC3CADBC1D0095AAC2BC1744FDF9D768BDE6
10 kujayhawk 000000000000051955C2915741ADEB4D86B506068FA10D6A5191D6C61D708FEC
--- --- --- no prizes below this point ---
11 miscio84 00000000000005785B7210D23435261F9981B367673D81964085D84357D9C8F4
12 filip 00000000000005ABA288C959766E107D49B28E2E9932855145E885C98DEAC62D
13 lenny 00000000000005AC7A6CFEE6487540B92BFCC4947CF922AF74B7CA5D20716B7F
14 zopyx 00000000000005B71D5366F00ABC42FBF555D1BE267A61ECF99951403BA53D10
15 Phraust 000000000000061CE6206AFEDC04D0A502B5E78F46A0A0AD50A01CB124F52C8C
16 benny32 000000000000064259533442DB63F5ACA7DFE370C89CF3091AD1C9CE0D5E25D8
13  Bitcoin / Pools / Tx fees going up. What is zero fee mining? What is fair pay? on: August 05, 2012, 11:26:59 AM
From http://bitminter.com/block/btc/000000000000029b07f1093ad8bea755a4f30419d79118612d741f0ba2f860d7

Quote
Total income (minting + fees): 55.26955000 BTC

Amount paid out to users: 55.26955000 BTC

If BitMinter didn't pay out the income from transaction fees that would be like a 10+% fee for mining this block.

What is zero fee? Can you even determine zero fee for PPS?

Are you paying a 10% fee at your pool?

At BitMinter we pay out all the coins that come in. You can choose whether you want to donate some back. That is zero fee.
14  Bitcoin / Pools / (finished) Mint Race Weekend (16 BTC prizes) on: May 24, 2012, 02:18:06 PM
BitMinter arranged a mint race for the weekend. The finest quality minting work (best hash) will win.

Start: friday 25.05.2012 at 20:00 UTC
Finish: sunday 27.05.2012 at 20:00 UTC

Prizes:
1st place: 10 BTC
2nd place: 4 BTC
3rd place: 2 BTC
You will also get a gold/silver/bronze medal in the upcoming achievement system, similar to Stack Overflow and various gaming systems.

Win conditions:
Just like your hash must beat the difficulty to produce a block, it must beat the other miners to win. The best (lowest) 3 hashes during the race will win.
As long as your work is accepted by the server it is valid for the race, even if it ends up "stale" or "orphaned" in the block list.

Verifiability:
Hopefully your mining software will show if you have created a block (the BitMinter miner does). Your block will show with your user name in the block list at http://bitminter.com/blocks. You can click the height number for the block (left most column) to see details. There is a link there to block explorer where you can see the hash value of the block both on the page and in the URL. The lowest hash value wins. Hash values are shown in hexadecimal. 0-9 is lower than A-F. A is lower than B. Pretty simple.

If this is popular we will have more mint races later and a page showing current standings in the race.

Final results: (updated 27.05.2012 at 20:03 UTC)

PlaceNameHash (lower is better)
1, 10BTCmalavita26000000000000062B2F28D5AA47F9C7EE05DCA83AD9EC16C5D72DA2DCF4D79ACE
2, 4BTCzerogravity00000000000007BE233BD1BEA218B02FBBECA9A07EF7C3DF08F5D34C411F3776
3, 2BTCjeffklause00000000000008F37FB201315AD4061ECC1034D5E662C7425A15EE51945B47BB
4jakob0000000000000A9015D5057863097B4E1AB7902B83690A1E35B9FE76161301ED
5dextryn0000000000000C0D835681B6D4B92B12757440A34C40E28F4BC115A2AAC96483
6Fefox0000000000000CC2560351C6724BF13B4E69AE4750246E61B741C1CC16F72EAB
7hartmining0000000000000E7EE05945C12801A6CC13A897C3575CB33C02E07DD6D4674019
8jeffklause0000000000000F753C5D5F175C085BBC7762627E9522FA534570DBFB89D246BA
9dobo7900000000000013B28A0894EF93EF8D28FE8D7461B4B049B1A7D4C40829C815E4
10mqpickens0000000000001643957EC35EE0115B24F5363CAF12695EA0A442A6DCEDC22DC3
15  Other / Off-topic / Please help test support for BFL FPGA devices in the BitMinter miner on: May 04, 2012, 03:33:31 PM
The BitMinter miner now has BFL support in the new beta version. Hopefully a tad bit faster than other miners due to faster work dispatch. Reported to run well on Windows and Mac. Still needs Linux testing!

It should also be able to run on ARM-based systems. I'd be especially interested to hear about this if you are able to test it.

Please try it and let me know how it runs. Just click the button to start (requires Java):

After starting it choose Devices->Probe all ports for FPGAs in the pulldown menus.

If the BFL devices don't show up as serial (COM) ports on your OS, you may need to install drivers: http://www.ftdichip.com/Drivers/VCP.htm (Thanks Phraust)
16  Bitcoin / Development & Technical Discussion / Alternative to getwork for miners/proxies on: February 21, 2012, 06:18:36 PM
There are some weaknesses in the way mining is done today, with the "getwork" json-rpc call. I'd like to suggest we create a new standard based on what Luke-jr. is working on for Eloipool. There is some code for this here: https://gitorious.org/bitcoin/eloipool/commit/fc22a5a3dee1843336f74d737b283ec3efe41533. As you can see it is basically a "getmemorypool" interface but instead of parts to create a generate transaction from, you get complete generate transaction from the server as "coinbasetxn".

I think it would be a good idea to add a "target" like "getwork" has, so that the server can control the difficulty for its clients. Also, perhaps the procedure should have a different name, since it is not the same as the "getmemorypool" of bitcoind?

What does this solve, compared to plain getwork?
  • Verify which address(es) the coins are going to, so pool op cannot steal without miners knowing it
  • Look for merged mining data in the coinbase, so pool op cannot secretly merged mine
  • Look for "water marks" (pool name) to see where your hashes are actually going. If you are mining on pool "A" and the name of pool "B" is in the coinbase, you will know what's going on. Yes, pool "A" could pretend to be pool "B" if they wanted. But they cannot remove pool "B"s name if using work from pool "B".
  • Perhaps prevent being used in 51% attacks? Bitcoin blocks will soon be required to include the block height in the coinbase, and you already have the hash for the parent block in the block header. Comparing height and parent block with a trusted source, you could see if you are building at a height lower than you should, or an unknown parent block. Only thing is, blocks take some time to become known by everyone, and there are also (non-hostile) forks. As long as the height looks ok, you'd have to cut some slack for unknown parent blocks.
  • Display some of this info to the user, like height, generate payment address(es), presence of merged mining and pool names or other printable strings.
  • IF server allows: Exclude transactions by whatever criteria the miner wants
  • IF server allows: Add more transactions the server doesn't know
  • IF server allows: Allow the miner to create its own work, thereby drastically reducing server load (server must allow modifying the coinbase, at least appending an extra nonce to it).
  • IF server allows modifying coinbase: allows miner to put its own mark in the coinbase (or is that a bad thing?)

Perhaps the data from the server should also provide info on which modifications of the data will be accepted.

Obviously this is the direction Eligius is already going. I think it would be a great benefit if we can agree on a standard and get as many pool servers, proxies and miners supporting it as possible. As suggested by Luke-jr. already, if you have a proxy supporting this then you don't really need miners to support it directly. But at a minimum you need pool servers and a proxy supporting it.

Downside:
  • Largish proofs of work from miners as the server must now accept entire bitcoin blocks - not just headers but a long list of transactions as well.
  • Servers: Possibly heavier processing of proofs of work from miners, depending on whether you care to check that all the transactions are OK and whether you allow modifying the coinbase.
  • Scammers: More difficult to scam people Cheesy

Possible fix for the first two points: all the transactions could be replaced by just coinbase and its merkle branch when the data cannot create a block and the miner just needs to prove it is doing work. More efficient but it means supporting 2 ways to deliver work. And it needs an extra "target" value (because of merged mining) to determine the lowest target for which the server can create a block.

One problem I can think of is if the miner gets a transaction from a local bitcoind that is on a different fork than the server's bitcoind. In that case you might get a transaction in a block when it already exists in the parent block. But I think duplicate transactions are simply ignored and do no harm, right?

PS: Maybe this time have 2 separate RPC procedure names? Not "getwork" both for getting work and for delivering work results. Never made sense to me.
17  Local / Skandinavisk / BitMinter i Dagens Næringsliv on: December 09, 2011, 10:17:11 AM
Det er et intervju med meg i dag (fredag 2011.12.09) i Dagens Næringsliv, på side 24, om BitMinter og bitcoins generelt. Det er også en artikkel om Meze Grill. Digital utgave av papiravisen kan kjøpes på http://www.dn.no/avis/bestilling/dagens/eavis?execution=e1s1 (obs: linken gjelder det som til enhver tid er dagens avis).
18  Bitcoin / Development & Technical Discussion / Nonce for merged mining chain merkle tree index on: November 06, 2011, 07:13:00 PM
After getting merged mining with a single auxiliary chain working, I'd like to implement support for multiple auxiliary chains.

I looked at how a chain's position in the chain merkle tree is calculated.

From namecoind source code:
Code:
    unsigned int rand = nNonce;
    rand = rand * 1103515245 + 12345;
    rand += nChainID;
    rand = rand * 1103515245 + 12345;

    if (nChainIndex != (rand % nSize))
        return error("Aux POW wrong index");

I don't get it. The nonce and chain ID are effectively added together. If I try a different nonce it will just make the same two chains collide in a different slot. It would have made more sense if nonce and chain ID were multiplied, then using different nonces would yield different results.

Am I supposed to increase the number of slots (nSize) until there are no collisions? Or are other auxiliary chains expected to use a different formula?
19  Bitcoin / Mining software (miners) / Bitminter client (Windows/Linux/Mac) on: July 23, 2011, 12:05:07 PM


Bitminter mining pool has it's own custom miner.

Features of Bitminter client:
  • Easy to use good-looking GUI
  • Zero installation(!)
  • Supported ASICs: Butterfly Labs (except Monarch), Block Erupter USB (and other Icarus-compatible), Chili, Red/Blue Fury, Antminer U1/U2
  • Works on Windows, Linux and Mac OS X

No need to manually install it, and certainly no need to build/compile it yourself.

Try it now:
  • 1. Fill in the pool sign-up form at https://bitminter.com/signup
  • 2. Start the miner with "engine start" here or on our website (Java required)
  • 3. Experience mining the way it should be


20  Bitcoin / Pools / [1050 TH] BitMinter.com [1% PPLNS,Pays TxFees +MergedMining,Stratum,GBT,vardiff] on: July 08, 2011, 01:50:21 PM


Make bitcoins at the BitMinter mining pool!

Why you want to join us:
  • ASICs supported with variable difficulty and your choice of 1: Stratum, 2: GBT, or 3: getwork with rollntime
  • Merged mining - get namecoins for free while you make bitcoins
  • Fast custom miner, easy to use, requires no installation
  • Only 1% mining fee! Additional optional donation can be adjusted after signup.
  • We pay income from transaction fees in addition to the freshly minted coins
  • Hopper-safe: income is split fairly between users (weighted and shift-based PPLNS)
  • Immediate payout upon block confirmation, in addition to hourly payment runs
  • Very few stales (meaning more bitcoins)

Joining us takes seconds:
  • 1. Fill in the little sign-up form at https://bitminter.com/signup
  • 2. Start the miner with "engine start" here or on our website (Java required)
  • 3. Experience mining the way it should be



Connect with any miner:
You can click the "engine start" button to launch BitMinter client, our user-friendly alternative, or in case you already have a mining client installed, here's how to connect to BitMinter.

We support all three communication protocols for mining. The old "getwork" protocol is the most primitive. Of the two new mining protocols, GBT (getblocktemplate) is focused on letting miners see (or even modify) the contents of the blocks they are mining, while Stratum is focused on using very little bandwidth.

Connect to stratum+tcp://mint.bitminter.com:3333 (Stratum) or http://mint.bitminter.com:8332 (GBT or getwork). As user name put your BitMinter user name, an underscore, then a worker name, e.g. DrHaribo_FastWorker. In case you have firewall issues, port 5050 (Stratum) and 80 (GBT/getwork) are also available.


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