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21  Economy / Service Discussion / Bitpay Down? on: September 10, 2012, 05:22:08 PM
Tried to buy some goods at an online storefront that sells for bitcoins.

When it redirected me to Bitpay I got "can't find server" error messages, and am getting the same when I try to visit the site in another window.

Is anyone else having trouble here? What's up?
22  Economy / Service Discussion / Relative Trust of Bitcoin Exchanges on: September 09, 2012, 12:31:11 AM
Where do you buy and sell bitcoins?

Which exchanges do you trust, and to what extent, and why?
23  Economy / Services / [WTB] Cloud Footage on: September 06, 2012, 02:17:30 AM
I'm looking for time-lapse footage of clouds rolling past on a blue sky. No other scenery, just the clouds, preferably looped or at least with enough blue that I might be able to loop it myself. I would need a CC-BY-SA-compatible license to use the footage, since the project for which I'd use it would be licensed in that way.

PM me if you're interested.
24  Economy / Goods / [WTS] Humble Bundle for Android (23% DISCOUNT) on: August 24, 2012, 12:31:07 AM
From the website:
Quote
The Humble Bundle for Android 3

Nine amazing games for your mobile delight. We’re bringing you a mountain of entertainment for your Android devices. Pay-what-you-want to get BIT.TRIP BEAT, Fieldrunners, SpaceChem, and Uplink. And if you beat the average price, you also get Spirits, Anomaly: Warzone Earth, EDGE, Osmos, and World of Goo! Please note that Uplink and SpaceChem require tablets if you’re playing the Android version.

Love your desktop? So do we. Buying the Humble Bundle for Android 3 also gets you the games on Windows, Mac, and Linux! For your listening pleasure, all nine games also come with an official soundtrack.

The games work great on Android, Windows, Mac, and Linux (system requirements here). Note that this is the initial release for many of the Android and Linux versions of the games. Please be patient while the developers fix any 1.0 bugs as quickly as they can, and don’t hesitate to contact us if you run into any issues.

I am selling gift URLs for the full package - all "above the average" games are included - for 0.5 BTC. This is 23% below what you would pay in USD. I'll be allocating 100% of my purchase to Child's Play.

I've done this twice before, and you can look at the successful transactions in those threads for proof of my trustworthiness. If you'd rather not take the risk, and have good rep of your own, I'm willing to send first. I'm also amenable to escrow if necessary.
25  Bitcoin / Bitcoin Discussion / Decentralized coin mixing algorithm, using Namecoin and SIGHASH_ALL on: July 17, 2012, 12:12:51 AM
Here's the algorithm:
  • Someone registers a K-V pair on the Namecoin network. The key is something like 'Melt:xxxxxxxxxxxx:0/3:1:InitialKey' - the xs are a randomly generated base58 round id (to distinguish from past and simultaneous swaps), the 0 is the id of the participant, the 3 is the number of bits of participants you're looking for (so, eight participants total, with ids 0-7), the 1 is the number of bitcoins that will be melted from each participant. The value assigned to this key will be your public key for communication with your fellow round participants.
  • Other people chime in with their public keys at addresses like 'Melt:xxxxxxxxxxxx:5/3:1:InitialKey' (this guy would be claiming id 5 in the cabal's range 0-7).
  • Each person posts their input and output addresses, encrypted with their binary-closest counterparty's private key. For instance, id 5 would post their input and output to 'Melt:xxxxxxxxxxxx:5/3:3:TxList', encrypted with the key at 'Melt:xxxxxxxxxxxx:4/3:1:InitialKey'.
  • Each person posts the input and output addresses of their group of two, encrypted with the private key of that group's counterparties. For instance, id 5 would post his input and output, combined with those of id 4, to 'Melt:xxxxxxxxxxxx:5/3:2:TxList' - two copies would be posted there, the first encrypted with the key at 'Melt:xxxxxxxxxxxx:6/3:1:InitialKey', the second encrypted with the key at 'Melt:xxxxxxxxxxxx:7/3:1:InitialKey'.
  • Things proceed. id 5 would post the combined inputs and outputs of ids 4-7 to 'Melt:xxxxxxxxxxxx:5/3:1:TxList', posting four copies: one each for ids 0-3 to read.
  • Now everyone knows the transaction that will be submitted to the Bitcoin network. They all do so, requesting the transfer of their own coins, making finalization of the transaction contingent on everyone else's coins arriving, and setting the transaction to void itself if it is not finalized by some period from the earliest InitialKey registration time among those involved InitialKeys.

My playing through this algorithm as id 5 means that only the participant at id 4 knows the mapping of my coins from input to output. The participants at id 6 and 7 only know that my output belongs to "either id 4 or id 5". The participants at ids 0-4 only know that my output belongs to one of 0-4's inputs. Everyone else only knows that my output belongs to someone who participated.

The overhead of this method per round is however much it costs to do log2(n)+1 Namecoin registrations, where n is number of participants in the round. Obviously, you'd want to do more than one round, so that your closest counterparty isn't aware of the "true" input->output mapping, but only the mapping for that round.

Thoughts?
26  Economy / Goods / [WTS] Humble Indie Bundle V (30% DISCOUNT) on: June 01, 2012, 12:39:24 AM
From the website:
Quote
The Humble Indie Bundle V

Eight incredible games. Humble Indie Bundle V features eight modern masterpieces and five epic soundtracks. Experience the fear and paranoia of Amnesia: The Dark Descent; the intensity and impact of LIMBO; the zany characters of Psychonauts; and the future-retro, audiovisual concoction of Superbrothers: Sword & Sworcery EP. Customers who pay more than the average price will receive the exquisitely crafted action-RPG, Bastion, and also the bundle-in-a-bundle bonus games: the time-warping puzzle platformer, Braid; the mercilessly challenging Super Meat Boy; and the intense psychological horror game, Lone Survivor!

The games work great on Mac, Windows, and Linux (system requirements here).
I am selling gift codes for the "full package" - Bastion included - for 1 BTC each. This is 30% below what you would pay in USD. I'll be allocating 100% of my purchase to Child's Play.

I've done this before with the Android Bundle, and you can look here for proof that I was trustworthy that time around. If you'd rather not take the risk, and have good rep of your own, I'm willing to send first. I'm also amenable to escrow if necessary.

Edit: Three new games added: Braid, Super Meat Boy, and Lone Survivor!
27  Economy / Goods / [WTB] Bedding on: May 26, 2012, 07:27:12 AM
Looking for:

Fitted sheet, sheet, blanket and/or quilt for Queen futon.

One or two pillows (pillowcase optional).

They don't need to match.
28  Economy / Speculation / Bull vs Bear is so 20th century on: May 01, 2012, 07:46:35 AM

In the cutting edge world of Bitcoin, it's "secret rocket versus secret submarine"!
29  Economy / Trading Discussion / Bitcoinica AML - When does it apply? on: April 28, 2012, 09:07:33 PM
Let's say I want to get in on the current 6% APR rates on Bitcoinica for depositing bitcoins.

Do I have to provide proof of identity? Even if I never use US$, or open a long/short position?
30  Bitcoin / Bitcoin Technical Support / 0.6 bitcoin-qt stuck at block 176947 on: April 28, 2012, 12:25:43 AM
I'm on the Satoshi QT client, version 0.6.0.6-beta.

At some point on 23 April 2012, the client crashed in boost library code (unfortunately I didn't save the error message) and since then the client has been unable to make progress in catching up to the network; it's stuck at block 176947. I tried -rescan with no success.

Does anyone know what might be causing this?
31  Economy / Goods / [WTB] Restaurant Gift Cards - paying 2% above face value - see inside for list on: April 12, 2012, 09:04:49 PM
Looking for gift certificates/gift cards to the following restaurants:
  • Applebees
  • Baja Fresh
  • IHOP
  • Bennigan's
  • Carrows
  • Dominos
I'm also interested in gift certificates for local Silicon Valley area restaurants; if you're close enough for that to be relevant I can provide a list.

I'm willing to pay BTC at the current Mt. Gox bid price, plus a 2% commission. I've traded before, but if you would rather not trust me, I'm willing to send first to a known good user, or use your favorite escrow.
32  Bitcoin / Mining / Who in the world is 95.120.241.167? on: February 21, 2012, 12:33:43 PM
Seems that in the last 24 hours, almost 10% of the shares (an estimated 1.2TH/s) went to this IP address. The holder is unknown - blockchain.info at least associates it with no public pool.

Anyone know what's up here?
33  Economy / Speculation / The hard thing about having a system... on: February 11, 2012, 06:41:20 AM
...is watching the price move, and edge closer and closer to the place where you would profit off of it, but like Zeno's arrow, never quite cross the line.

Being automated is suffering.
34  Economy / Digital goods / [WTS] Humble Bundle for Android - Discounted on: January 31, 2012, 08:17:50 PM
From the website:
Quote
The Humble Bundle for Android

Five awesome games for your Android device. Jump start your mobile game collection with Anomaly: Warzone Earth, Osmos, EDGE, and Toki Tori. If you pay more than the average price, you also get the indie classic World of Goo!

Playing at your desktop? No problem. Buying the Humble Bundle for Android also gets you Mac, Windows, and Linux versions of the games.

Pay what you want. If you bought these games separately, it would cost around $60, but we are letting you set the price!

The games work great on Mac, Windows, Linux, and Android (system requirements here). If you're not sure if your Android device is compatible, give these demos a try.
I am selling gift codes for the "full package" - World of Goo included - for 0.6 BTC each. This is below what you would pay in USD. I'll be allocating my payment as a 100% donation to Child's Play.

If you have good trading rep on this forum, I'm willing to send first and take payment once the gift codes are received. For people with zero rep (like me), we can use any reputable escrow service.
35  Economy / Speculation / The Doldrums on: January 24, 2012, 07:43:46 PM
Price between 6.2 and 6.4 for two days now. That's, what, a 3% range?

Feels downright eerie, especially compared to the volatility we were seeing just a week ago.
36  Bitcoin / Wallet software / Looking for a small Bitcoin client on: January 19, 2012, 10:46:34 PM
I'm trying to find a Bitcoin client that fits certain limitations:
1) Source code form must fit in 1.4 MB compressed (the smaller the better).
2) Actually downloads and maintains the blockchain - not a "thin" client.
It's okay if it's a command-line app; GUI isn't necessary for my intended use.

Are there any alternative clients that fit these requirements?
37  Other / Beginners & Help / Physical Bitcoin - Alternatives to Casascius? on: December 01, 2011, 08:30:48 PM
The idea of being able to "spend" Bitcoins via passing around a redeemable note seems pretty neat to me, but the only such hat in that game right now seems to be Casascius, who have really daunting mint fees (65% for the "pocket change" size!)

I looked into Bitbills too, but, although their mint fees seem more reasonable, from what I hear they haven't actually been selling for several months now...

Does anyone know of any other such endeavors, or possibly what's going on with Bitbills?
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