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1  Bitcoin / Project Development / Tracking Mining Pool Success on: May 17, 2015, 11:23:44 PM
I'm tracking which miners made which blocks for a game that we built.  We decided to put the results of our block-watching on its own website and to provide an API.  Not sure if it's useful to anyone, but please check it out:

http://whomined.com

API:

http://api.whomined.com - return last 144 blocks (excluding most recent three)
http://api.whomined.com/#blocknum  - return 144 blocks from blocknum
http://api.whomined.com/miners - return miners statistic and misc info
http://api.whomined.com/miner/<minerid>/<blocknum>  returns last 144 blocks mined by miner staring with blocknum

Feedback welcome.  :-)
2  Bitcoin / Mining / WhoMined.com -- data on which miners mine which blocks on: July 01, 2014, 06:23:15 AM
Hey,

A friend and I just launched this website to try to better keep track of who mines which blocks.  It's not an exact science, but we're going to keep track of blocks based on receiving BTC address, Coinbase signature, and scraping miner websites.

B̶i̶t̶c̶o̶i̶n̶.̶i̶n̶f̶o̶,̶ ̶b̶y̶ ̶c̶o̶n̶t̶r̶a̶s̶t̶,̶ ̶u̶s̶e̶s̶ ̶t̶h̶e̶ ̶I̶P̶ ̶a̶d̶d̶r̶e̶s̶s̶ ̶o̶f̶ ̶w̶h̶i̶c̶h̶ ̶n̶o̶d̶e̶ ̶r̶e̶l̶a̶y̶e̶d̶ ̶t̶h̶e̶ ̶b̶l̶o̶c̶k̶.̶ ̶ ̶A̶l̶s̶o̶ ̶a̶ ̶v̶a̶l̶u̶a̶b̶l̶e̶ ̶m̶e̶t̶h̶o̶d̶.̶

Please let me know what you think.  Suggestions are very welcome.

One change I want to make is to display the data in different ways -- last 144 blocks (day) / last 288 blocks (48hrs) / 1015 (week).

Our analysis goes back to block #285451. You can use the URL to quickly look-up a specific block. For example: http://whomined.com/#301234
3  Bitcoin / Development & Technical Discussion / Question about 'Height' certainty on: March 27, 2014, 11:08:35 AM
I assume that faking the blockchain 'height' is not a serious threat to the bitcoin protocol.  It isn't on the list of vulnerabilities: https://en.bitcoin.it/wiki/Common_Vulnerabilities_and_Exposures

I'm trying to better understand the process by which it is prevented.  Any references are appreciated.  Thanks!

edit:  I think what I may be asking for is the background workings of the API call 'getblockcount' -- https://en.bitcoin.it/wiki/Original_Bitcoin_client/API_calls_list
4  Economy / Gambling / Sheldon Adelson vs Online Gambling in America on: January 09, 2014, 11:12:27 AM
www.forbes.com/sites/nathanvardi/2014/01/06/the-biggest-bet-ever/

Quote
. . . . a roster of billionaires . . . are betting big on online gambling’s comeback.  There’s just one problem with all of this: Sheldon Adelson. The very week that Caesars’ online gambling play started trading on the Nasdaq, Adelson, the nation’s fifth-richest man–and one of the country’s biggest political donors–thanks to his vast casino holdings, unleashed an army of lawyers and lobbyists on Washington and state capitals, telling FORBES he will “spend whatever it takes” to stop online gambling in America.

. . . . in the fall of 2006 Congress passed the Unlawful Internet Gambling Enforcement Act (UIGEA), strengthening the Justice Department’s tools to go after online gambling firms operating in the U.S. Some companies, like PartyGaming, quickly ceased their U.S. operations, leaving the then $1.4 billion U.S. online poker market dominated by two offshore companies, PokerStars and Full Tilt Poker, which profited immensely because of the high-margin nature of the business. But federal prosecutors and agents kept investigating the companies, seizing their funds and eventually in 2011 shutting down the websites of the major online poker companies that cater to the U.S. and indicting their founders. . . .

Not long after shutting down the offshore operators, the Department of Justice reversed its long-held opinion that all forms of online gambling are illegal, unleashing states that wanted to regulate and tax online gambling except sports betting. Sensing profits, the billionaires followed.  Why the turnaround? Expensive lobbyists and lawyers are a big part of the answer. . . .

So while Adelson’s limitless money–and his willingness to spend it–may slow the momentum for online gambling by blocking its spread into big states like California and Florida, the odds of him stopping it or bullying his rivals out of the game are slim. He’s got lots of chips, but all the other players at the table do, too.
5  Economy / Securities / [BTC-TC] The rise and fall of W4A-BOOK on: October 08, 2013, 12:58:22 AM
I've completed a buyback of the asset I issued, W4A-BOOK, on btct.co.  I'm posting here for the sake of openness and transparency.

BACKGROUND:

The asset W4A-BOOK was a new idea in crowdfunding.  Rather than relying on philanthropy or advanced sales of my next book, I wanted to try selling shares of it.  This would allow philanthropists to share in my success, should I find it.

The book is a memoir about getting recalled for a third combat tour (to Afghanistan) while becoming a radical libertarian.

I already have credentials as a writers:
- http://opinionator.blogs.nytimes.com/author/roman-skaskiw/
- http://www.amazon.com/The-Tea-Party-Explained-Ideas/dp/0812698312

Anyway, after some conversations with btct.co's Ethan Burnside (a great gentleman), I applied to have securities issued.  My application was approved on August 9th.  A few days later, I attempted (and succeeded) in selling 100 of the 400 shares I issued for .24 BTC each.  The 100 shares represented 10% ownership of the book and a 10% claim on all proceeds I might earn.

The reason I only sold 100 shares was because I was more interested in proving a concept than in raising money.

Step one seemed like a success.  With 24 bitcoins in my paper wallet, I'm began writing (and attending bitcoin & libertarian conferences).

Then came the bad news that Btct.co was closing.  See their website (https://btct.co/) for the announcement or bitcointalk.org (https://bitcointalk.org/index.php?topic=125629.msg3214807#msg3214807) for the discussion.

THREE OPTIONS:

I considered the following:

1. Transfer of shares to another exchange.

2. Continued ownership of shares in private.

3. A buy-back of all shares.

COMMENTARY:

I didn't like #1 for several reasons:
- It takes time and effort to issue shares and since we still don't know the details behind BTCT's closure, I fear other Bitcoin stock exchanges might meet the same fate.
- The fee for issuing a security is usually 2 to 5 BTC.  That's a non-trivial amount when you're only planning to raise 20-something BTC.


#2 was a possibility, though my main objective was proving a concept and perhaps generating a little publicity.  If the stock exchange aspect was all handled privately, my goals wouldn't really be met.  There'd be no market for shares of the book.

My preference was #3, buying back all shares at the original issuing price -- 0.24 BTC each.  Since trading volume for this asset was extremely low, such a buy-back would cause most parties to break even or come close.  #3 had another advantage: simplicity.

ACTION

I communicated with shareholders via email.  Those who responded represented over 90% of the outstanding shares.  They agreed with #3.  One of them, the largest shareholder, initially preferred #2, continuing our agreement in private.  I was prepared to do that, but he deferred to my preference (which I described as a "slight preference" in our correspondence).

He gave me lots of encouragement for this project, and is another example of the good faith and integrity that always impresses me in the Bitcoin community.

Today, I completed the buyback.  BTCT.CO had a system for actually buying back shares through their website, but they also had a warning that customers should withdraw their funds.  I didn't want to send money to a website which may be in regulatory trouble, so I shut off trading and executed the buyback by simply sending BTC to the public keys of all the shareholders.  I emailed each of them a transaction ID.

============

I invite you all to purchase an advanced copy of the memoir:  https://bitcoinstarter.com/projects/182  The new working title is "The Way Back".
6  Economy / Service Discussion / How does blockchain.info figure out which miner won? on: September 29, 2013, 01:35:21 PM
I tried to search for an answer to this question, but couldn't find one.  I also looked here: https://en.bitcoin.it/wiki/Blocks#Block_structure

Are the miners on fixed Bitcoin addresses so Blockchain.info associates certain addresses with the major pools?
7  Bitcoin / Bitcoin Discussion / I'm looking for a decade(s)-old article about cryptography that anticipated BTC on: September 13, 2013, 01:44:50 PM
I'm putting together a presentation about bitcoins for a conference and I wanted to cite this article.  I remember reading it and though I had saved it, but I can't find it.  Maybe someone can help.

The article was written in the 80s or 90s.  Perhaps even in the early 2000s.  It was a discussion of crypto.  The author, who is now deceased, claimed to have sources in the NSA who knew crypto would eventually defeat them and even be incorporated into a currency.

The only other thing I remember is that the article was pretty long.

Any ideas?

thanks!
8  Bitcoin / Bitcoin Technical Support / Strange Transaction to Localbitcoin Wallet on: September 04, 2013, 12:43:10 PM
Hello, everybody.

I just had a strange transaction not process, and I can't figure out what happened.  After looking through the sticky threads and searching for a resolution without finding one, I'm posting a new topic.

Here's what happened:

1) I finally retired my one hard-working GPU from bitcoin mining.  I mined up to the minimum withdrawal amount from my pool (50btc) and sent that amount to my localbitcoin wallet address.  Here's a picture of my localbitcoin wallet address when I'm logged in:



If you want to copy and paste: 1FmSrQp7Vr8UL3ohG7wHhKtq23XzDrcti1

2) I sent 0.01051083 BTC to that address.  (It took about 3 days to mine it.)

3) When the transaction didn't show up in my localbitcoin wallet, I searched for that address on blockchain.info.  Here's what I found:



My initial transaction is there with a bunch of confirmations, but then there's another strange transaction on top of it involving 3+ BTC.  (I never keep more than 1 BTC in my web-based wallet.)

What happened?

--------

I have two theories, both of which seem fairly implausible:

1) I've been tricked into sending BTC to an address that isn't actually my localbitcoin address.

2) localbitcoins.com uses some kind of intermediate address and eventually, my bitcoins will show up.

Any perspective is appreciated.  Thanks a lot.

ps - I did have a small amount of bitcoins in my localbitcoin wallet.  They are still there, undisturbed.
9  Bitcoin / Bitcoin Technical Support / viewing transaction memos on: August 30, 2013, 11:32:32 PM
Forgive me if this is an obvious question, but is there a way to view the memo attached to a transaction?  I don't see it when I search for the transaction on blockchain.info.
10  Bitcoin / Development & Technical Discussion / How to miners decide which transactions to include in a block? on: July 26, 2013, 04:07:56 PM
Forgive me if this is a beginner question.  I'm still relatively new.  The answer to this question wasn't apparent to me from reading Stoshi's famous whitepaper (http://bitcoin.org/bitcoin.pdf).

Here's my guess based on what I've already learned:

Whenever a bloc emerges which the miner agrees is valid, it simply accepts it, and adds to it all the currently-recorded transactions which have happened since then.

Is this accurate?  Is there more to it?
11  Economy / Securities / comparing bitcoin stock exchanges: mpex / btct / cryptostocks / bitfunder on: July 25, 2013, 04:25:02 PM
I did a quick comparison of bitcoin stock exchanges today and thought I'd share my initial impressions.  Please let me know if I missed any major exchanges, or if I got the wrong impression anywhere:

MPEX
website: primitive
30 day volume: 22,000 btc
listing fee: 30 btc!!!
other comments: They operator seems insufferably rude.  You can see it in his FAQ.  These guys are best known for handling the recent SatoshiDice deal.  Between the high fee and rude operator, it's not clear to me why people use this service.

BTCT
website: so-so
30 day volume: 108,000 btc
listing fee: 5 btc
other comments: Based in Bolivia.  You can really sense the legal uncertainty of bitcoin securities on this websites.  There are huge, very verbose disclaimers all over the place.

Cryptostocks
website: nice!
30 day volume: 300 btc
listing fee: 2btc!
other comments: looks great.  I'm not sure how long they've been around.  Maybe they're new and that's why the volume is so low.  I dig the low listing fee.

BitFunder
website: nice!
30 day volume: not sure, but I think it's very high
listing fee: 5btc
other comments: another great-looking site.  Everything seems professional

That's it.

The reason I'm looking into this is that I'm thinking of doing crowdfunding for a literary project, and rather than appealing to straight philanthropy, I thought it'd be more fun and effective to sell shares of the proposed book.  Is anyone aware of this having been done before?  I'm not.  Any thoughts are appreciated.

12  Bitcoin / Bitcoin Discussion / A block with only a single transaction? on: July 08, 2013, 03:34:30 PM
How is this possible?  https://blockchain.info/block-index/397162/000000000000005c96cd4c45b9bd96f3f75c4a94dad528bbead164f14c05a611
13  Bitcoin / Bitcoin Discussion / "invalid send amount" on blockchain.info wallet on: June 27, 2013, 06:45:37 PM
Why can't I send money from my blockchain.info wallet Is there a minimum transaction size I'm unaware of?

The amount I'm trying to send is > 0.01

Seems the minimum RECOMMENDED is 0.02 btc.  Source: https://blockchain.info/wallet/send-shared
14  Bitcoin / Development & Technical Discussion / Copying instead of downloading the blockchain on: June 25, 2013, 12:56:40 PM
In the interested of saving time, I tried this recently (on Ubuntu 12.04) and the qt client kept hanging without ever opening.  Am I correct to assume that the blockchain can only be downloaded, not copied?
15  Other / Politics & Society / Espionage charges against Snowden -- Naming a bitcoin unit for Snowden on: June 22, 2013, 08:54:56 AM
Obama administration charges NSA whistleblower Snowden with espionage

http://rt.com/usa/snowden-charged-espionage-sealed-092/

It will be a travesty to internet freedom if they succeed in ruining this young man's life.  I think espionage carries the possibility of the death penalty, though they probably couldn't countenance using it.

More likely, it would be indefinite detention and torture -- like the way they did Bradley Manning: three+ years in solitary confinement, long-term sleep deprivation, nakedness.  The poor kid was broken to the point of "dancing erratically" to pass the time and licking the bars of his cage. (Source: http://www.vice.com/read/the-torture-of-bradley-manning, Google.)

Hopefully, Snowden is beyond their grasp, but if they get him, I'd love to see the action protested by having the community name a bitcoin unit after him. 

1 Bitcoin
.1
.01
.001
.0001
.00001 = Snowden?
.000001
.0000001
.00000001 = Satoshi

Of course the big Bitcoin players would never overtly support this.  They are rightly afraid for their investment, afraid the legions of heavily armed tax collectors, and the thousands of pages of vague, confusing laws regulating their economic activity.

A case can be made that such a protest action would violate Bitcoin neutrality, but I think that protecting individual privacy is very much in the spirit of Bitcoin.  If empowering individuals is a valuable part of the Bitcoin ethos, then Snowden's revelations can only be considered heroic.

Of course, like everything Bitcoin, like everything peer-to-peer, this must be driven by consensus.  At this point, its just a thought I wanted to share.
16  Bitcoin / Electrum / Electrum, ASC files, signatures on: June 18, 2013, 02:03:15 PM
Can someone please refer me to an explanation of what I see when I go to download the Electrum Bitcoin Client:

You can download stand-alone executable files or installations.  No problem there.

Then you also download these files but they end in ".exe.asc" and beside each of these is (I think) an md5 key.

I assumed that these are somehow encrypted executable files and decrypting them verifies their authenticity.  Is that right?  I tried messing around with GnuPG, but to no avail.  Couldn't get it to work on my windows system.

Any guidance is appreciated.
17  Other / Beginners & Help / Newbie Forum Graduation? Post #5 here. on: May 21, 2013, 12:01:40 PM
Brimming with confidence, I now make my way to the grown up forums:

18  Other / Beginners & Help / On Dec 31, 2013, the price of 1 BTC will be: on: May 21, 2013, 11:50:13 AM
I suppose analysis should take into account a weakening dollar as much as a rising Bitcoin.

Some people think the emphasis on Bitcoin as a store of value (or commodity for trading) distracts from its use as a medium of exchange.  What do you think?
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