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281  Local / Altcoins (Français) / Re: L'avenir des Altcoins on: May 08, 2015, 02:22:01 PM
The cited paper about double-spend attacks is flawed because it is incomplete: it ignores gane theory and the economics of mining. For instance, the effect of a shorter confirmation time over decentralization is ignored. Yet it is a fact that shorter confirmation favors concentration amongst miners to reduce stale block rate. Simply because shorter confirmation time entails more stale blocks. As a result, the likelyhood of a double spend attack is increased, not reduced. There are other considerations that I could develop here if I had time.

Sure, but by the same token there are ways to deal with so-called orphan blocks and to reduce miner centralisation (eg. p2pool, Monero's Smart Mining), and improvements both on the hardware and software side are reducing latency on an ongoing basis. Thus your statement is orthogonal both to the point of the paper and to the point I was making. What perl said is factually incorrect and misleading, I corrected that.
282  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [XMR] Monero - A secure, private, untraceable cryptocurrency - 0.8.8.6 on: May 08, 2015, 11:21:36 AM
Just to make the point: I do like the RPi2 very much! Actually I'm happily using one as ftp and ip-cam server. Did try Monero on it... way too slow!! I would even claim the RPi is too slow for anything based on PoW. Bitshares' DPOS might work, but that's another story.

So, why bother with slow hardware if you can have something >10x faster (not to mention memory and disk space and software) for virtually the same price and similar wattage/running costs.

Don't get me wrong, Bitseed's offer/product is pretty cool, but it does not suit the purpose well (Monero, PoW node) when compared to an Intel based solution. As little server it will be awesome for sure.


Ah - I didn't realise it was a RPi II inside the BitSeed. Oh well.
283  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [XMR] Monero - A secure, private, untraceable cryptocurrency - 0.8.8.6 on: May 08, 2015, 07:57:35 AM
From the other side of town:

https://bitseed.org/product/pre-order-bitseed-v2/

Quote
Also new for Bitseed v2 is support for altcoins – Bitseed Altcoin Edition is now available for pre-order!

We will be handling altcoins on a per-coin basis, and will only be accepting orders for single altcoin devices after the first 100 unit sales of devices supporting a particular altcoin e.g. if we receive an order for 100 units to support Litecoin, we will then add the option to order single units that support Litecoin. We encourage any interested altcoin communities to put together a group order of 100 units and then send us a message to receive an invoice for your bulk order. Be sure to note which software you want us to add support for and send a spreadsheet or some other kind of organized document with the individual order information (shipping details and unit amounts).

So it would take 12k to get the 100 units.


Are these just for running a full node? Doesn't seem to be quite worth it to me compared to a Rasp pi unless there is something else they can offer.

Mh, not convinced that the pricing is good. I believe it is a better deal to assemble a little server/node box yourself (it is like assembling Lego):

60$ System-on-Chip / Intel Celeron J1800 @ 2x2.41GHz / Mini-ITX (e.g., fan-less)
30$ 2x2GB S0-DDR3 memory (or 60$ for 2x4GB)
30$ Harddisk >300GB (for noise reduction, consider a >100GB ssd at 50$)
40$ Mini-ITX box (fan-less)
-----
160$ total

After building the box, put Ubuntu on (or Windows) and run Monero, done.
Btw, the RPi2 is way slower then any such machine! For 50-100$ more you even get a 1150-socket cpu based mini-system (with fan).

ADD1: Such systems run at 10-30W at wall. Ok, that is a little more than Bitseed's 10W, but who cares (it is still <5$/month).
ADD2: Of course, you can run different clients on the assembled machine at the same time (monero, bitcoin, bitshares, ... whatever).


If we group buy @ 100 units then it comes down to $120 each, which is somewhat more attractive, although I doubt we'd be able to do so before May 10 (for the free 250gb hard drive upgrade) so the units would have 160gb drives.

I'm torn, I actually think it might be quite cool, and I'd be in for 10 units, but whether we can drum up enough support to hit 100 units I dunno.

This might be a job for the FFS (forum funding system)...which, if all goes well, we're deploying tonight:)
284  Local / Altcoins (Français) / Re: L'avenir des Altcoins on: May 07, 2015, 03:09:49 PM
ça sent le scam a plein nez. Le gars qui en parle dans la video considère qu'un temps de confirmation plus court, c'est forcément mieux!
soit il n'a rien compris à la sécurité d'une blockchain soit c'est un scammer (ou peut être même les deux à la fois)

Je ne peut que être accord avec cela. C'est pas parce que la transaction est dans un mempool que la transaction est validé et surtout suffisamment confirmé.
Et ceci même si il choisis d'un même pool qui la confirme dans une pseudo side chain.

30 confirmation de 1 minutes, on autant de valeur que 3 confirmation de 10 minutes.
60 confirmation de 1 minutes, on autant de valeur que 9 confirmation de 60 minutes.  
P.S J'ai arrondis est simplifié le calcul car le premier block ne devrai pas compter complètement

You'll excuse me posting in English, but this is absolutely incorrect, nearly to the point of being purposely disingenuous.

Meni Rosenfeld's paper, "Analysis of hashrate-based double-spending", demonstrates that it is not the amount of clock time that has passed that makes it secure, but the number of consecutive blocks. To quote from section 5 of that paper:

Quote
  • Waiting for more confirmations exponentially decreases the probability of double- spending success. The decay rate depends on the attacker’s relative hashrate.
  • The probability of success depends on the number of confirmations and not on the amount of time waited. An alternative network with a different time constant T0 can thus obtain more security with a given amount of wait time.

So 30 confirmations is FAR, FAR more secure than 3 confirmations, regardless of the block time target, for an attacker that controls the same % of the hashrate for the respective coins he's attacking.

There are other arguments to be made for increasing our block time, the number of confirmations required for security isn't it.

If anyone wants to discuss this more I'll be speaking in Paris (in English;) in two weeks time: http://www.meetup.com/Paris-Bitcoin-Meetup/events/222290717/
285  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [XMR] Monero - A secure, private, untraceable cryptocurrency - 0.8.8.6 on: May 07, 2015, 02:28:10 PM
Yes it's just not automatic the way it is in Linux. There are some other issues with it, too, but nothing show stopping. Also, sparse files aren't supported at all on the Mac. Anyway, we'll get it worked out.

The Mac thing is a little deeper/weirder than that. Here's what I mean:


[ ric->lmdb ]$ ruby
File.open('bigassfile_DELETE_ME', 'w') do |f|
    f.seek(1000000000)
    f.puts('l')
end
[ ric->lmdb ]$ ls -lh
total 14107248
-rw-r--r--  1 ric  staff   954M May  7 16:24 bigassfile_DELETE_ME
-rw-r--r--  1 ric  staff   5.8G May  7 16:23 data.mdb
-rw-r--r--  1 ric  staff   8.0K May  7 09:27 lock.mdb


In other words, the leading nulls in the 1gb file count as actual data (whereas ext2 and above would let you use that space and would only allocate blocks as needed). However, as you can see, the LMDB file doesn't have the full 16gb allocated, which (I would imagine) is the OS X VFS handling the sparse file abstraction.
286  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [XMR] Monero - A secure, private, untraceable cryptocurrency - 0.8.8.6 on: May 06, 2015, 03:19:35 PM
ok i managed to convert on windows 7 x64 with batch size 1000 using blockchain_converter. was really fast(maybe 30min), but:

- data.mdb uses now more than 16gb, this is not normal no? this looks like some crazy pre allocation. same happens when exporting / importing.
- i want to highlight again, on windows monero uses now %programData% as default location instead of %appData% like in 0.8.8.6.

i am fully synced right now and bitmonerod uses 31 Megabyte of ram  Grin
good job devs !!! Kiss


yeah, thats the size of my data.mdb. Fluffypony said it something with windows not liking sparse files. Whatever that means.

weird - I think my data.mdb was in %appData%/bitmonerod/LMDB , not %programData%, but I'll double check when I get home.

So basically what happens is we let LMDB pre-allocate 16gb for the blockchain, and then we'll add in a function to automatically pre-allocate more as needed. This is great on every OS that has sparse file support, as the size on disk will only be like 5gb (ie. the bit with actual data). However, it appears that on some flavours of Windows, or some Windows environments, that it takes up the full 16gb on disk. We're currently working on a more efficient pre-allocation system that will preallocate an additional 1gb once there is < 500mb preallocation available, as that should be fast enough for the foreseeable future whilst solving the pre-allocation Windows issue.
287  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [XMR] Monero - A secure, private, untraceable cryptocurrency - 0.8.8.6 on: May 06, 2015, 05:48:34 AM
is there a way so i can seed the blockchain even better? i have bandwidth to give.


oh someone deleted my post from yesterday, why?  Cry
i thought it was funny, sorry english is not my native language

You are not alone.

Whoever is acting as the Thread Nazi doesn't seem to appreciate it when someone that is a non-Dev acknowledges another person's attempt at humor or makes an attempt at humor themselves.

I had a post deleted that consisted solely of "lawlz" in response to a Dev's humorous post.

I took it as a hint and now refrain from posting lalwz. Kiss

It's not non-dev posts, my trollbeads post got removed too. I sent a message to the moderator of this section to find out why, and he pointed to this thread: https://bitcointalk.org/index.php?topic=703657.0

We're continuing to add functionality to the Monero forum (recently we added @username highlighting) so the conversation will evolve there.
288  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [XMR] Monero - A secure, private, untraceable cryptocurrency - 0.8.8.6 on: May 06, 2015, 05:44:41 AM
^I'm running blockchain_import now. I tried blockchain_convert first, but export and then import (with --verify 0) works much faster for me.

Is there a drawback to this? If this works and is a lot faster, then what's the point of blockchain_convert?
It worked until it stopped at block ~240000 - tried it twice. I'm now back to converter.

Is this on Windows? I remember seeing something about setting the block size smaller being a work around for that.


Yeah, the same thing just happened to me. I'm going to give --batch-size 10000 a try.

Edit: Nope, that crashes, too. What's a reasonable value here?

We've been most successful with 1000 on Windows, which is probably what we'll set the default as.
289  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [XMR] Monero - A secure, private, untraceable cryptocurrency - 0.8.8.6 on: May 03, 2015, 06:29:02 AM
Remember when the database build was going to be merged into production last January?



in b4 fluffy pony flips his shit because I pointed out the obvious

Nobody said it would be merged into production last January, that would be impossible as Monero only launched last April. I think you might be confusing this with some other project?

At any rate, here is where it got merged into "production" (we call github "staging") - https://github.com/monero-project/bitmonero/pull/256
290  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [XMR] Monero - A secure, private, untraceable cryptocurrency - 0.8.8.6 on: May 03, 2015, 06:24:45 AM
Yes, it is. It's intriguing to me on it's own right, but I really got into it for a specific as-of-yet-unnamed reason. Grin

Your deep and everlasting affection for fluffy ponies?
291  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [XMR] Monero - A secure, private, untraceable cryptocurrency - 0.8.8.6 on: April 30, 2015, 12:46:45 PM
I don't remember who stated it above, but I do agree that the lack of exchange/merchant adoption might have something to do with the hassle of depending on users to include payment IDs.

Pay ID serialisation into the receiving address looks pretty far down on the roadmap. In the meantime, is there a reason why Payment IDs can't simply be appended to the address and parsed automatically by the client? That would make it much easier for third parties to manage payments until "stealth" payment IDs eventually get implemented.

No checksum is one reason why this will potentially backfire. That and the payment ID space is unnecessarily huge.

I'll take a look at my notes from the MRL meetup in November last year, we had some ideas about fixing the payment ID format and serialising it, there may be a quick win to be had whilst we chip away at the stealth payment IDs.
292  Alternate cryptocurrencies / Service Announcements (Altcoins) / Re: CoinMarketCap.com - Market Cap Rankings of All Cryptocurrencies! on: April 29, 2015, 07:52:57 AM
Please then also add

crip Launched with de-optimized or crippled code

That is historically factual, and admitted by the project and its devs.



The "dev" who launched Monero is thankful_for_today: https://bitcointalk.org/index.php?action=profile;u=233561

Thankfully when we (the current Monero core team) found the purposefully obfuscated code we immediately fixed it and made the fix freely available to all. This is what smooth means when he describes the Monero launch as fair. As dga says, at most thankful_for_today would've had a week of advantageous mining, but as our difficulty retargetting worked just fine and we didn't have crazy high initial block rewards there was very little that the scammer thankful_for_today could've made off with.

Note that these are all facts, directly observable by comparing increases in difficulty (ie. network hash rate) with the improved hashing code submitted to github. It does not require trust, it does not require anyone to take our word that coins have been sold or distributed, it is not based on hope. It is absolute, truthful, factual, verifiable by all.

We could have kept the fix to ourselves and just mined away, amassing a fat stash of XMR. We were under no obligation to release the code for a faster miner, we weren't even in a position of stewardship of the Monero project, we were just a bunch of enthusiasts. If we'd mined for a year with the improved miner we could easily have controlled 90% of the hash rate between us (the improved miner was 12x faster than the original) and mined several million XMR. We could've thrown a flashy GUI together, made wild promises of all sorts of stuff we were going to create (with screenshots) and slowly dumped our stash on an overexcited market.

The 7 members of the Monero core team could be USD millionaires today if we had done that. If I had to throw some numbers out, we'd probably have been able to accumulate around 5.5 million XMR, so 785 000 XMR each. At the current spot price thats only $345 000 for each of us, but since we'd be pumping out screenshots and other flashy nonsense I'm sure we'd be trading over 0.01 BTC, which would put our stash at a cool $1.73 million for each of us (and the total stash would be worth $12 million).

Something to think about.
293  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [XMR] Monero - A secure, private, untraceable cryptocurrency - 0.8.8.6 on: April 28, 2015, 10:36:01 PM
I believe this to be a good time to remind the public of the little known fact that both fluffypony and smooth have a history of scamming.
It's nearly a year now, that I got scammed out of a winning auction position by force of insider outbidding!

The full facts list and irrefutable evidence is forever recorded in the bitcointalk history books:
Pizzagate - The Monero Scandal

* Disclaimer: the inferior comedic skills of the author entitle you, the reader, to reflect upon the present post with a moderate-to-absent smile. Giggles not permitted.

These are lies fabricated by the Pizzacoin dev. We are innocent in pizzagate! I did not have slices of that pizza, Margherita Lewinski.
294  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [XMR] Monero - A secure, private, untraceable cryptocurrency - 0.8.8.6 on: April 28, 2015, 10:33:56 PM
Monero had a bad launch. Your community decided to live with it.

Darkcoin had a bad launch. The Darkcoin community decided to live with it.

It's always good to compare like-for-like, so let's look at the first 48 hours:

The first 5 056 blocks of Dash bring us to the 48 hour mark. This means the average block time for that period was just over 34 seconds, vs. the 2.5 minutes it is today. At the end of the first two days 2 020 652 Dash had been mined. That's 38% of the total Dash in existence today, and 9.18% of all Dash that will ever exist.

The equivalent for Monero is the first 3 037 blocks, which brings us to the 48 hour mark. This means the average block time for that period was just 56.9 seconds, vs. the 60 seconds it is today. At the end of the first two days 53 350 Monero had been mined. That's 0.72% of the total Monero in existence today. As we have infinite tail emission it the actual % it represents tends towards zero, but if we want to take the initial 18 446 744 XMR as a base value (because minimum block reward takes 7.5 years to kick in) then it represents 0.29% of that initial emission.
295  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [XMR] Monero - A secure, private, untraceable cryptocurrency - 0.8.8.6 on: April 28, 2015, 10:32:11 PM
Its been clear for months now that the actions of smooth ,Adam White and the other relentless neurotics are counter productive!
Unless the aim was to indirectly damage the reputation of Monero beyond all possibility of redemption while keeping the DASH thread consistently on top of the stack day after day......

Did you seriously edit a stock vector art preview??
296  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [XMR] Monero - A secure, private, untraceable cryptocurrency - 0.8.8.6 on: April 28, 2015, 10:18:05 PM
I've been a large and long term holder of Monero up until this week, approx this time last year my XMR holdings were worth $60,000 and I've sold none until now, why did I decide to sell - because I took a good long look at the coin, it's development and potential as far as I could see it and decided that it was no longer something that I wished to support.

Why did I take a fresh look at it, because among other coins that I back is DASH and on the BCT DASH thread there is constant trolling by Monero fans and the dev smooth, just check how many posts he's made there today alone, dozens and dozens and dozens, why is this happening - I assume to make the thread unreadable and spread FUD, well it does this but it also creates a very poor image of crypto in general and Monero in particular, it is going out of one's way to try and antagonize everyone who sees it.

So I am no longer prepared to back a coin that has a main dev act in such a toxic way, I now no longer own any and do not plan to in the future, those remaining I wish you well with it but my decision to sell three days ago was primarily a business one, I do not see a bright future for this coin as things are atm I'm sorry to say.



 

I feel your pain. The entire dev team is behind the DASH FUD campaign. They chose smooth to carry the attack because he has nothing to lose, his reputation in this thread was lost months ago.

Inspired by Otoh's brave example, I also have decided to sell all my XMR. I use the Dark Theme on Poloniex because I'm cool. As you can see, this is me selling everything. As you can see from the screenshot I'm selling my 192382374923412.203874 XMR for 384782064260.56750488 BTC (around $86.19 trillion). Hopefully the market can sustain this dump.



In future I look forward to teleporting you all to my private island on the planet Neptune, where we can fly our hovercars around and laugh about the good ol' days.

Edit: fixed for the luigis
297  Alternate cryptocurrencies / Service Announcements (Altcoins) / Re: CoinMarketCap.com - Market Cap Rankings of All Cryptocurrencies! on: April 28, 2015, 09:54:04 PM
-I refused to read the answer to that question, so I have to keep asking to make it look like I'm right and fluffypony is wrong-

By means of a direct comparison, where Dash's average block reward for the first 4500 blocks was 443 Dash, and 33.5 Dash on average thereafter, let's look at Monero's.

For the first 4500 blocks (like an hour and a bit) the block reward was 17.5 XMR. The average block reward for the 12+ months thereafter is 13.7 XMR.

Do you see the dichotomy?

Wait, are you saying XMR was mined 4500 blocks in the first hour? 4500 * 17.5 = 78,750 XMR, which is worth of 78 BTC using the first weeks' OTC price.

Or did I get some of the numbers wrong.

Could someone please verify/invalidate the numbers above?

Invalid

Coin launch and the first few blocks were 2014-04-18 10:49:53:

http://moneroblocks.eu/search/1

Block 4500 was three days later 2014-04-21 09:36:22:

http://moneroblocks.eu/search/4500

Thanks for the correction. I think the expression "like an hour and a bit" threw me off, could be a language barrier I'm not native English speaker.  Huh

Not you, it's me - I don't know what I meant to put in brackets, but "an hour and a bit" wasn't what I meant:)

In any case it's nonsensical of me to compare block to block, as we have different block times. A better comparison is on the first 48 hours of launch.

The first 5 056 blocks of Dash bring us to the 48 hour mark. This means the average block time for that period was just over 34 seconds, vs. the 2.5 minutes it is today. At the end of the first two days 2 020 652 Dash had been mined. That's 38% of the total Dash in existence today, and 9.18% of all Dash that will ever exist.

The equivalent for Monero is the first 3 037 blocks, which brings us to the 48 hour mark. This means the average block time for that period was just 56.9 seconds, vs. the 60 seconds it is today. At the end of the first two days 53 350 Monero had been mined. That's 0.72% of the total Monero in existence today. As we have infinite tail emission it the actual % it represents tends towards zero, but if we want to take the initial 18 446 744 XMR as a base value (because minimum block reward takes 7.5 years to kick in) then it represents 0.29% of that initial emission.
298  Alternate cryptocurrencies / Service Announcements (Altcoins) / Re: CoinMarketCap.com - Market Cap Rankings of All Cryptocurrencies! on: April 27, 2015, 08:43:33 PM
-I'm now purposely choosing not to read the answer because I struggle with reading comprehension-

Welcome to my ignore list! You are one of two people that has proved so bizarrely retarded that I can no longer stomach reading your puerile vomit without feeling quite ill.
299  Alternate cryptocurrencies / Service Announcements (Altcoins) / Re: CoinMarketCap.com - Market Cap Rankings of All Cryptocurrencies! on: April 27, 2015, 08:28:20 PM
-I refused to read the answer to that question, so I have to keep asking to make it look like I'm right and fluffypony is wrong-

By means of a direct comparison, where Dash's average block reward for the first 4500 blocks was 443 Dash, and 33.5 Dash on average thereafter, let's look at Monero's.

For the first 4500 blocks (like an hour and a bit) the block reward was 17.5 XMR. The average block reward for the 12+ months thereafter is 13.7 XMR.

Do you see the dichotomy?
300  Alternate cryptocurrencies / Service Announcements (Altcoins) / Re: CoinMarketCap.com - Market Cap Rankings of All Cryptocurrencies! on: April 27, 2015, 08:03:52 PM
-scam supporting nonsense-

Another thing I find interesting is that the average block reward for the first 4500 Dash blocks (ie. the first 32.8 hours) is 443 Dash.

The average block reward for the 70 000-odd blocks since then is 33.5 Dash. What an incredible difference!

Truly, the gods must have shined upon those miners, as they simultaneously punished those who perhaps fell ill and didn't check Bitcointalk for a day. It really is clear that this is just a happy accident.
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