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1061  Other / Off-topic / Re: Why are you not at Wall Street? on: October 08, 2011, 08:45:31 AM
But yet they are ripe for education.

Informative post. These are my same sentiments. It's easy to be an arm-chair pessimist. But more rewarding to be helping others form an understanding. Not imposing your ideas, but being an available infopoint.

And the protesters are not one political colour. They're people from all planets. Just how the bitcoin community is not of one political group.
1062  Other / Off-topic / Re: Ganzfeld effect on: October 08, 2011, 08:37:43 AM
Are there any puredata patches?
1063  Other / Off-topic / Re: My living room on: October 08, 2011, 08:03:14 AM
Blank pages? When I click the arrows I get blank pages.

edit: now it works Smiley

Hello mum. Nice dress you got there >_>

haha this is funneh. do the people know we're watching them?
1064  Other / Off-topic / Ganzfeld effect on: October 08, 2011, 08:00:29 AM
Without looking up what Ganzfeld effect is or reading the comments, try this video:

Really intense... Damn. I cannot get past 2 mins before it becomes too overpowering.
1065  Bitcoin / Project Development / Re: UK exchange: Intersango (formerly Britcoin) on: October 08, 2011, 02:24:57 AM
Id like to report a problem...i filled out a withdraw request,and now when i click on the request id # it says : Requested withdrawal of  GBP to
thats it..nothing after to..its not reporting the name of the beneficiary account details etc like it used to on britcoin

I think I know what the problem is. Would you mind sending me your account login to The front-end of the site is simply display, but internally everything should be fine.

1066  Bitcoin / Bitcoin Discussion / Re: Bitcoin - The Future and How We Get There on: October 07, 2011, 03:53:46 AM
lol he makes really good points.
1067  Bitcoin / Development & Technical Discussion / Re: PyBtcEngine: BTC backend in Python (with C++/SWIG) on: October 07, 2011, 03:06:58 AM
This is great Smiley We need more clients. Since you're working on the network part feel free to ask me any questions. I pretty much know the source code inside out. I'm genjix on Freenode IRC in #bitcoinconsultancy or Skype: zgenjix (although IRC is better Smiley

If you're looking for a good library/framework, then Twisted is a really good choice. It's a piece of battle-hardened software and used by several big vendors (like Facebook, Rackspace .etc).

Also AGPL is fine. That poster is wrong when he says it cannot be used in commercial settings- it sure can. Think of other AGPL'ed software like SQL databases. You're communicating over the wire with a daemon. Same with bitcoin. The only time you have to release the source code is when you a) extend the program or b) link against the program/make function calls. Everything else is kosher.
1068  Bitcoin / Bitcoin Discussion / Re: E-Wallet better or not? on: October 06, 2011, 08:37:47 AM
I have a better idea

Why don't you find someone who is capable of re-writing the official Bitcoin client in PHP, with a small addition like built-in authentication having the password scrambled with one of your keys (256-bit PKI authentication). Make sure you trust him not to embed a trojan horse in the code though.

Then find a reputable and well established web-hosting service company and rent a single page php only account (<$10/year), where you run your PHP script Bitcoin client.

That way you can have your wallet in the cloud, accessible from any device you may have, regularly backed-up by the cloud service, but still keep it private and secure and sleep peacefully knowing that no stammer can steel your BTC.

The sourcecode is open:

1069  Bitcoin / Bitcoin Discussion / Re: BitCoin Scamming Business is Booming! on: October 06, 2011, 08:29:57 AM
We're the only long running exchange that hasn't been compromised (formerly Britcoin) and are based in London with a development team. Our group (Bitcoin Consultancy) is also actively involved in developing other areas of bitcoin, operates other services and is working with merchants. And we charge no fees.

Our about us:


Our development's group website:

We were the ones just at SWIFT's (the messaging network used for international bank transfers) SIBOS conference on the future of banking discussing how bitcoin could be used to improve international transfers.

So we're pretty much heavily invested in bitcoin for the long term. The purpose of our group is to hire people to work full-time on furthering bitcoin. We release many of our project's source code for the community. We're also helping organise the European Bitcoin Conference.

If you appreciate our work, and wish for bitcoin to grow, then use our exchange. In return it allows us to grow our development team to push forwards and create more community projects we can contribute. It's my hope to turn this into a talent base to allow the brightest minds to prosper and develop cool technology- like Google or Apple but for specifically for bitcoin and other cryptocurrencies.

1070  Bitcoin / Meetups / Re: Events - Meetups, conferences and other events on: October 06, 2011, 07:15:41 AM
Shame about that London RSA talk as it's the day before the Prague bitcoin conference:

November 25-27 European Bitcoin Conference:

1071  Bitcoin / Bitcoin Discussion / Re: 'hacked'. Database and wallets 'stolen' on: October 06, 2011, 02:36:40 AM
Why were people using an exchange in Eastern Europe with no public contacts and a previous history of bad security? Same story with MtGox. Same story with MyBitcoin. I honestly cannot understand why.

And I should mention that orderbook volume is usually 1% of the total funds on a site. It probably is a significant amount of funds. It's sad this has to happen to people time and again.

1072  Bitcoin / Bitcoin Discussion / Re: E-Wallet better or not? on: October 05, 2011, 11:16:16 AM
1073  Other / Off-topic / Re: So I might be a narcissist... on: October 04, 2011, 06:07:11 AM
Wait, this is the same Atlas that was a gigantic misanthrope before? Now he is calling himself an altruist?

Your world view is breaking down as you're seeing the gigantic flaws in your belief system.

It's ok. My world view is in constant flux that I've stopped holding dogmas. You should really look into Carl Sagan or James Burke for some other perspectives that will add value to your belief system. They certainly changed me fundamentally.
1074  Bitcoin / Bitcoin Discussion / Re: banned bitcoinmarkets account due to "bitcoin is ponzi scheme" on: October 04, 2011, 02:44:30 AM
Well that's nice to know that it was a misunderstanding. These things usually are and it can be hard being a mod. I guess bitcoinmarkets did look commercial at first glance, especially if you're busy.

1075  Bitcoin / Bitcoin Discussion / Re: IMCEX.COM Bitcoin Exchange - about us on: October 04, 2011, 12:57:38 AM
What's your motivation for opening a new exchange considering how saturated the market is? Why not some other service? Just curious.

Good luck with your exchange though.

1076  Bitcoin / Bitcoin Discussion / Re: banned bitcoinmarkets account due to "bitcoin is ponzi scheme" on: October 04, 2011, 12:47:00 AM
00:47 < genjix> hey
00:47 <+J0lle> hmm.. then im not gonna disturb you any further =)
00:47 < genjix> what do you think of bitcoin?
00:47 -!- [WTC-SWE] changed the topic of to: Thepiratebay: UP| Bayimg: UP | Baywords: DOWN | Suprbay: UP  HTTPS avaible now at SB  | Ask in channel
          before PMing an OP
00:48 < genjix> i heard thepiratebay doesn't like bitcoin... why?
00:48 -!- mode/ [+b *!*] by [WTC-SWE]
00:48 -!- genjix was kicked from by Jallers [Banned]

Hypocrisy from the same people who are supposed to be fighting for free speech.

1077  Bitcoin / Development & Technical Discussion / Re: OP_EVAL proposal on: October 02, 2011, 04:55:15 PM
Right now, it's impossible to safely hold corporate-scale amounts of money in Bitcoin, because corporations can't trust any one person with unrestricted spending power.

OP_CHECKMULTISIG makes it possible to have a transaction that requires several signatures (need 2 of 3 sigs from A, B, C). This proposal is to allow finer grained logic for when a payment is redeemed (A and B's sigs or just C).
1078  Bitcoin / Wallet software / Re: libbitcoin on: October 02, 2011, 06:42:19 AM
Big milestone reached! libbitcoin is the one of the first alternative implementations of the bitcoin protocol (along with node-bitcoin-p2p) to do full blockchain validation! Exciting milestone. It's taken me around 6 hours to download and validate the blockchain.

Here's a sample of validation times at 130k blocks in milliseconds:

Also I wrote a development statement for libbitcoin (also in the OP).

The Zen of libbitcoin
Readability over speed.
Beauty over convenience.
Simplicity over complexity.
Architected, not hacked.
Flat, not nested.
Explicit, not implicit.
Errors should be loud.
Never is better than right now.
Now is better than never.
Be flexible and configurable.
Build houses from bricks, software from modules.
Stability is god.

Random bitcoin trivia:

First transaction is in block 170

First standard transaction in block 728

The first difficulty change was at block 32256

Blocks 91842 and 91812, and, 91880 and 91722 contain the same duplicate coinbase transaction. The miners can only use that transaction once.

2016 (amount of blocks for difficulty re-calculation) corresponds to exactly 2 weeks of 10 minute ideal blocks. 210k (amount of blocks for drop in mining reward) only roughly corresponds to 4 years.

There was a forced fork in the blockchain a while back around 710k blocks when someone DoS bitcoin's scripting system using an excessive number of OP_CHECKSIGs. That's why IsStandard() exists today.

Block 142312 was the first block to have a non-standard coinbase. I think this was one of luke-jr's blocks possibly since it follows his pattern of instant spend.

block 546 spends a tx within the same block: 6b0f8a73a56c04b519f1883e8aafda643ba61a30bd1439969df21bea5f4e27e2
1079  Bitcoin / Development & Technical Discussion / OP_EVAL proposal on: October 02, 2011, 05:44:03 AM
Ya joking?

A scripting system inside a scripting system. Hacks on hacks on hacks will lead to a messier protocol than FTP is now.

Well, it seems good at first glance. But fast-tracking this into the block-chain is probably not a wise idea. There's no rush so it might be prudent to think of this as something for 2 years time or later. Bitcoin is not exploding tomorrow, so there's no big loss from holding off on momentous changes like these.

That's a good place to start. Re-enabling parts of the old scripting system in a controlled manner is a good idea. Adding new operations- not so much *right* now.
1080  Bitcoin / Development & Technical Discussion / Re: Difficulty adjustment needs modifying on: October 02, 2011, 05:31:49 AM
Basically I'd propose that from 144 blocks (~24hrs) after a difficulty adjustment, and tested then and each 12 blocks (~2hrs) after that, if the actual calculated adjustment based on all blocks since the last adjustment is higher or lower by 50% than the current difficulty, then an early difficulty adjustment should kick in.
Comments? Suggestions?
I have a semi-constructive suggestion:

Anyone proposing a change in the feedback controller for difficulty should be required to show the stability region of his proposal. Pretty much everyone who tries to "improve" the PI controller implemented by Satoshi comes up with some hackneyed version of PID controller and then is surprised that it can be made to osciallte and is not even assymptotically stable in the Lyapunov sense if any nonlinearity is included.

I may have some software engineering disagreement with some of the Satoshi's choices, but the choice of PI regulator to adjust the difficulty is an example of excellent engineering: PI-s may be slow, but they are absolutely stable for every causal process and for every error signal.

PID controllers are completely standard, and the reason to use them (from my experience) is that they can be very easily fine tuned to optimal cybernetic states.

Can you explain your reasoning though for arguing that the difficulty adjustment is a PI controller? P = nActualTimespan / nTargetTimespan? Then where do you get the integral component from the difficulty re-calculation? To me it looks like a simple proportional scaling algorithm.
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