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421  Alternate cryptocurrencies / Altcoin Discussion / Re: CoinChoose - alternative site to show respective profitability of the alt coins on: July 18, 2013, 03:32:47 AM
Hey Sal any chance we could clean up the reward and price column by rounding?

I really don't think there is any critical information needed past the 7th decimal place. People are normally looking at the charts for order or ordering themselves. It would help clean up some of the awkward white spaces and make things line up a little nicer and I don't think it would penalize anyone.



4-5 significant digits should be enough for each coin.
422  Alternate cryptocurrencies / Service Announcements (Altcoins) / Re: Just-Dice.com : Invest in 1% House Edge Dice Game on: July 17, 2013, 09:24:49 PM
Dooglus, I'm curious how much is being bet on a daily basis since inception. You published it here once for a few days showing an average of 2.5k btc bet per day. I'm curious how that has evolved over time until today.

I would like to see these stats excluding the bets of cici/nakowa/celeste.
423  Bitcoin / Pools / Re: [ANN] CoinLab Protected Pool on: July 16, 2013, 11:27:17 PM
- We are suspending the 97% bonus for protected pool miners (it hasn't been used in a couple of weeks anyways)
So all those who haven't redeemed all their protected shares will lost them forever?

CoinLab Protected pool was the pool where you could earn those loyalty points last year. The Redeem pool is for redeeming them. I presume Chris meant that the protected pool will return to 95% PPS again. However, we still haven't heard anything about the 90 days expiration rule that sneaked it's way into the first post. Have some users' points been expired because of that rule?
424  Bitcoin / Pools / Re: Why has our pool luck just dropped off? on: July 14, 2013, 01:55:38 AM
OP wins, obviously.
425  Alternate cryptocurrencies / Altcoin Discussion / Re: [XPM] Mining PrimeCoin using DigitalOcean (VPS) on: July 09, 2013, 11:06:09 PM
Is there a way to have the coins generate into a wallet on my local machine.  Like if I use the same private key as my local wallet or something?

Just copy the same wallet.dat file to each machine. I think that might cause problems if you have blocks generated to over 100 addresses. Then the pre-generated pool of keys might run out and new keys would not be the same on all wallets. A deterministic wallet wouldn't have this problem, but I'm not sure if it's deterministic or not.

But then how do they sync?   I've only got like five instances running.

The wallet you initially create on one machine is filled with 100 keys. If you copy the same wallet to other machines, they will use those same keys. When one machine generates a block, the other machines pick it up from that block since they have a key for the address where the block reward went to.
426  Alternate cryptocurrencies / Altcoin Discussion / Re: [XPM] Mining PrimeCoin using DigitalOcean (VPS) on: July 09, 2013, 10:39:17 PM
Is there a way to have the coins generate into a wallet on my local machine.  Like if I use the same private key as my local wallet or something?

Just copy the same wallet.dat file to each machine. I think that might cause problems if you have blocks generated to over 100 addresses. Then the pre-generated pool of keys might run out and new keys would not be the same on all wallets. A deterministic wallet wouldn't have this problem, but I'm not sure if it's deterministic or not.
427  Alternate cryptocurrencies / Altcoin Discussion / Re: [XPM] Mining PrimeCoin using DigitalOcean (VPS) on: July 09, 2013, 10:13:37 PM
Is mining Primecoins somehow against their terms of usage? If not, they really are calling the wrong people idiots when dealing with this 'attack'.
428  Bitcoin / Hardware / Re: Avalon ASIC users thread on: July 09, 2013, 04:09:40 AM
i don't even recognize that UI.  where's it from?

It's the worker dashboard from BTC Guild.
429  Alternate cryptocurrencies / Altcoin Discussion / Re: CoinChoose - alternative site to show respective profitability of the alt coins on: July 08, 2013, 07:31:01 PM
Could you make it so that by default, it ranks coins by "Avg Profitability Past 7 Days"? It's more meaningful than just current profitability, I think.

Or just allow users to select their favorite column, and sort by that when page auto-updates. Maybe store it in a cookie.
430  Economy / Exchanges / Re: www.BITSTAMP.net Bitcoin exchange site for USD/BTC on: July 07, 2013, 09:08:07 PM
5th transaction with BITSTAMP and still happy.
I love the security feature which requires (EMAIL CONFIRMATION) during transaction.  This is a great security feature/mechanism just in case...
Well, apart of informing the government of your country, your ISP, several independent ISP vendors, the government of the USA, China and your national government and several independent hackers of your financial affairs, it is a nice feature to have.
Especially when it allowed the hackers to steal coins from bitcoin.cz accounts and others.

Oh, there is two-step authentication via third party named Google-spy-know-all, if you are comfortable with it. Ownership of Google-controlled Android phone is mandatory. Your e-mail, phone calls will be recorded and the data shared with the US government as a precaution, should you mean any trouble to them.

Minor point, I know, but I don't think an Android phone is mandatory. Google Auth has iOS app for iPad & iPhone for example.

Also, contrary to what many people seem to believe, Google Authenticator requires no communication with Google. The device that carries your codes could even be offline, if you can keep it's clock synchronized accurately enough.

If you don't trust Google Authenticator (which by design has no reason to communicate with Google), the algorithm it uses is completely open and you can implement it yourself. But I think someone would have already noticed if the application was secretly doing network communications, when it has no reason to do so.

It's true that some sites offering 2FA use the QR code drawing service of Google, and that really doesn't help in making people understand how the system works. Since in that case the code IS coming from Google, it's only natural that people assume Google is somehow unavoidably involved in the 2FA process, no matter how it's implemented. Obviously the proper way is that sites draw the QR codes themselves, instead of using an external service and leaking codes in the process.
431  Alternate cryptocurrencies / Pools (Altcoins) / Re: [ANN][MultiCoin][Stratum+GW] multipool.in - Always mine the most profitable coin on: July 07, 2013, 04:58:32 PM
My confirmed LTC balance is suddenly negative (-0.2182).
432  Alternate cryptocurrencies / Pools (Altcoins) / Re: [ANN][MultiCoin][Stratum+GW] multipool.in - Always mine the most profitable coin on: July 07, 2013, 06:25:46 AM
At the suggestion of one of our hero members, I am switching from fixed Last-N based payouts to time-based payouts.  I think it makes a bit more sense considering the nature of our pool.

I am setting the following time periods for each of the coins currently on the pool:

LTC: 24 hours
TRC: 6 hours
FTC: 8 hours
MNC: 30 minutes
WDC: 30 minutes
DGC: 30 Minutes
NVC: 12 hours

Please respond with any comments or concerns.

I don't completely understand the implications myself yet, but I had a vague feeling that time-based PPLNS had some problems, and the PPLNS thread seems to confirm:

Quote
The most naive implementation is to have a fixed N and simply pay the last N shares equally. However, this makes it more profitable to mine before difficulty decreases, and less profitable before difficulty increases - the number of blocks that are expected to be found in your window depends on the future difficulty, while the payout you can receive elsewhere depends on the current difficulty.

It doesn't help if N is chosen to be a given multiple of the difficulty at the time a block is found. If the difficulty is about to increase, it is more profitable to mine a short while before. For example, if N is set equal to the difficulty D, a share submitted D shares before the increase will be paid the full expectation in the D-window, and then when difficulty increased it will once again go inside the window and have more expected reward. And, like the previous case, shares submitted just before the difficulty change will be rewarded similarly to shares submitted after it.

Another incorrect implementation is to pay all shares in a window given in units of time (sometimes called PPLNM or PPLNH). In addition to the problems above, it has a problem common to all reward systems that use time as a factor, which is that it is more profitable to mine when the current hashrate is higher than the average.

Now that I'm actually mining on a pool which uses this method, I might give it more thought, and perhaps understand the problem. Not a lot of money at stake here, and I don't mind being motivated to do some research Smiley

Shift-based PPLNS would be the best PPLNS implementation based on that thread. It's used on BTC Guild and BitMinter.
433  Alternate cryptocurrencies / Pools (Altcoins) / Re: [ANN][MultiCoin][Stratum+GW] multipool.in - Always mine the most profitable coin on: July 07, 2013, 05:17:30 AM
MNC server seems like it may be overloaded again. Manually switching to MNC pool instead of multiport worked for a little while, but not long... I've switched over to LTC again manually in the mean time.

I tried setting the diff to 16 for MNC so we would get fewer stales, but it's too much for the server to handle when the multiport is on it..

Once we move to the two load balanced servers this should no longer be an issue and I would expect we will be able to scale well past 2+GHash on the scrypt pools.

Why do you think that the share difficulty would have an effect on stale rates? AFAIK, it just has an effect on the variance of stales rates. With a higher difficulty, it's less likely to get rejects on block changes, but the rejects that do happen have more impact. This should result in exactly the same stale rate, no matter which share difficulty is used.

When the block changes, the current share being worked on is abandoned and if submitted it's rejected.  Since the miner submits target 16 shares (approximately) twice as fast as target 32 shares, reducing the difficulty should result in the same number of stales, but the percentage of stales should be half since the total number is higher.

The unavoidable latency between issuing a work restart and a miner receiving it results in a small window where the miner is effectively working to produce stale shares. Some devices (like BFL ASICs) also have additional latency on restarts, but let's ignore that. The latency window is always the same, no matter which share difficulty is used. If a miner is using diff16 shares, the probability of producing a stale share is twice that of another miner which is using diff32 shares. Not the same, as you are implying in the bolded part of what I quoted.

Reducing share difficulty makes it more likely that stale shares are produced during block changes, because the chance to produce a share that matches the target during the latency window is higher. But since all shares have lower value, expected total stale difficulty is the same.
434  Alternate cryptocurrencies / Altcoin Discussion / Re: [ANN] CryptoSwitcher - Automatically mine the best coin. on: July 07, 2013, 03:42:49 AM
This is way too much trouble

I can't understand why there are so many pools, and compare sites, why is there not a pool that simply collects SHA256 and Scrypt cycles, and does all the magic in the background, and pays you in a destination crypto?  Huh

There is a pool that always tries to mine the most profitable coin. https://www.multipool.in. That being said, you could also use CryptoSwitcher to setup a similar port forwarding service yourself, and pick only the coins that you want to mine. There's nothing forcing you to touch the miners when a coin change is triggered in CryptoSwitcher, you could just as well change a port forward to point to a different pool or coin daemon, and always keep your miners pointed to the port that's being forwarded. Just like multipool is doing it.
435  Alternate cryptocurrencies / Pools (Altcoins) / Re: [ANN][MultiCoin][Stratum+GW] multipool.in - Always mine the most profitable coin on: July 07, 2013, 02:13:04 AM
MNC server seems like it may be overloaded again. Manually switching to MNC pool instead of multiport worked for a little while, but not long... I've switched over to LTC again manually in the mean time.

I tried setting the diff to 16 for MNC so we would get fewer stales, but it's too much for the server to handle when the multiport is on it..

Once we move to the two load balanced servers this should no longer be an issue and I would expect we will be able to scale well past 2+GHash on the scrypt pools.

Why do you think that the share difficulty would have an effect on stale rates? AFAIK, it just has an effect on the variance of stales rates. With a higher difficulty, it's less likely to get rejects on block changes, but the rejects that do happen have more impact. This should result in exactly the same stale rate, no matter which share difficulty is used.
436  Bitcoin / Pools / Re: [3700 Gh/s] DeepBit.net PPS+Prop,instant payouts, we pay for INVALID BLOCKS too on: July 07, 2013, 12:51:04 AM
Am i misunderstanding something about bitcoins? looking at http://blockchain.info/blocks/Deepbit , I see lots of submitted blocks, yet looking at the statistics page of the deepbit website, it shows no blocks for almost 2 days.. what's wrong? :/
Answered LOTS of times already. Blockchain.info is publishing incorrect data about block's origin.
Maybe think about signing the coinbase?
What for ?
Signing the coinbase would identify blocks from Deepbit without any overhead. Detection from blockchain.info et all would be dead simple. I'm personally not sure why you don't want your blocks to be easily identified and don't particularly care that they're often incorrectly identified.
Pool hopping.
437  Alternate cryptocurrencies / Service Announcements (Altcoins) / Re: Just-Dice.com : Invest in 1% House Edge Dice Game on: July 07, 2013, 12:43:44 AM
Getting scammed is my main concern, yet I do have BTC invested. Serious injury or death is my main concern when I skydive. I still do it.
What is it about dooglus that causes this concern?  I understand there are others in this forum that have scammed in the past, but what does this have to do with him?  Was he even associated with any of them?
He's using an anonymous, chargeback free, legal gray-area currency, and we know little more about him than his exceptionally common (purported) real name. He has very strong economic incentives to take the money and run. The fact that others have scammed gives us a lot of information:
- Anonymous people here often favor the economic incentive to scam over the moral / reputational incentive not to
- Post count / duration on board is not a reliable indicator of trust
- A significant portion of the trusted people here have simply been pulling long-cons
(These actually do affect the likelihood that dooglus will scam, because probability.)
- People are usually unable to recover stolen bitcoins.
It's worth noting that 'dooglus' with the same real name has had a definite online presence well before the beginning of Bitcoin. It's a rather well thought out scam, if he indeed did create a false online personality for scamming purposes before Bitcoin was invented.
438  Economy / Exchanges / Re: www.BITSTAMP.net Bitcoin exchange site for USD/BTC on: July 04, 2013, 02:54:01 PM
I am very sad about the API change. Skip, offset? And limited to a max request of 100 trades?

Tell me, how do I fetch "all trades since 1st june" now? Iterate over and over again with a limit of 100 results and proceed with a smallish offset like 60 to avoid missing new trades, because there is no relation between offset and anything else?

The old fetch wasn't optimal, but this is dissatisfying and will create way more requests and an even bigger overhead. Suggestion: from, since time or TID.

And please create a newsletter for developers or publish a PSA for further changes.

Edit: limit and offset isn't even working.

https://www.bitstamp.net/api/transactions/?offset=1500&limit=10

Quote from: God
Kids with css skills learning entrepreneurship on your teeth.

You're welcome, kakobrekla.
439  Alternate cryptocurrencies / Pools (Altcoins) / Re: [ANN][MultiCoin][Stratum+GW] multipool.in - Always mine the most profitable coin on: July 04, 2013, 02:18:29 PM
I'm often seeing stats with zero accepted shares and lots of invalids on some coin. My miners report accepted shares, obviously with some rejects during block changes. I'm also getting paid, though it's a bit hard to say yet if I'm getting the correct amount for my hashrate. The share stats just look really messed up, and are rarely updated. For example, my FTC stats have been stuck at 50 invalids and zero valids for a while now, even though I'm getting accepted shares in constantly.

Do the hashrate graphs include rejected/stale shares, or are they based on just accepted shares? It would also be great if multiport users could view a combined graph of their hashrate.

Also a question to miners here: are you using any backup pools in cgminer/bfgminer? I'm thinking of adding a LTC backup pool, but cgminer README warns against using on multiple blockchains at the same time. Previously I thought that would mean even the multipool concept wouldn't work, but clearly that's not the case. Maybe it's still a problem with backup pools?
440  Economy / Exchanges / Re: www.BITSTAMP.net Bitcoin exchange site for USD/BTC on: July 02, 2013, 09:41:12 PM
5th transaction with BITSTAMP and still happy.

I love the security feature which requires (EMAIL CONFIRMATION) during transaction.  This is a great security feature/mechanism just in case...


Question for Bitstamp:
How often does this email confirmation occur? or is it when I am not doing too many transactions
when email confirmations kick in? or is it random? what is the going rate for email confirms.

Unless I'm mistaken, confirmation emails are only sent when you withdraw USD or BTC. That should deter most attackers, since they can't directly steal anything if they have access to the account.
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