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121  Economy / Gambling / Re: Coinroll - Dice rolling game | Instant bets | Off-the-chain | 1% House edge on: May 09, 2013, 10:00:50 PM
You should implement in your API a way to get the minimum and the maximum bet value allowed. This will avoid us having to rewrite our script everytime the values change.

Added a method that does exactly that: /getgameinfo
122  Economy / Games and rounds / Re: 5 BTC giveaway! on: May 08, 2013, 03:59:51 PM
Same person with an alt? (Same sig)

https://bitcointalk.org/index.php?topic=198934
123  Economy / Gambling / Re: Coinroll - Dice rolling game | Instant bets | 1% House edge | API on: May 07, 2013, 05:17:23 PM
To which URL is it possible to use your API?(I may have not seen it)

API info: https://coinroll.it/api
124  Economy / Games and rounds / Re: 5 BTC giveaway! on: May 07, 2013, 08:42:03 AM
@Scrat Acorns: Do all my bets participate in the draw, or just the one I mentioned here ?

Just the one you posted here.
125  Economy / Gambling / Re: Coinroll - Dice rolling game | Instant bets | 1% House edge | API on: May 06, 2013, 09:26:46 PM
Bet "§" and all your balance is GONE!

Not gone, it's some sort of weird rounding/display error. In the process of fixing it.

EDIT: Fixed, sorry for the delay. Press F5 to reload the client side javascript.
126  Economy / Gambling / Re: Coinroll - Dice rolling game | Instant bets | 1% House edge | API on: May 06, 2013, 09:03:09 PM
5 Bitcoins are up for grabs.

More details.
127  Economy / Games and rounds / 5 BTC giveaway! (Ended) on: May 06, 2013, 09:01:49 PM
Coinroll.it (Forum thread) is sponsoring a 5 BTC giveaway to lucky players.

All you have to do is play one game on our website - it can be as low as 0.00001 BTC. The amount of bets you make doesn't matter, and neither does the number that you rolled. What you need to do then is paste the bet ID of one of these bets as a reply to this thread.

The 3 winners will be chosen in 2 weeks using the following procedure:

We have chosen a random 12 digit hex ID in advance. The SHA256 hash of that string (plus extra padding to avoid brute forcing) is
Code:
f93e0d55b98e61dddfa4d3aae8204cfa727c909af15ef81ccdda9ac8313ceca4

The ID will be revealed in 2 weeks - the 21st of May.

The 3 winners are those with a bet ID which has the smallest modular distance to our random ID.


The modular distance is defined as
min((a - b) mod 248, (b - a) mod 248)
where a, b are 48bit integer representations of the hex IDs


Prize pool:
Winner: 3 BTC
2nd and 3rd: 1 BTC each

Winners will be asked to prove that they actually played the game by either signing a message from one of the originating addresses or performing an action on the website while logged in.


Why the modular distance? Why wouldn't a regular subtraction do?
If we used the absolute value of (a - b) instead then bets wouldn't have a uniform distribution of probability.

_______________________________________________________________

It's over!

The ID was e889acf0504e

The hashed message was
Code:
e889acf0504e_randompadding#gJ7n39u5

Script that was used

The output


Winners:
Pokerfan: 3 BTC
danieldaniel: 1 BTC
kuriboh: 1 BTC
128  Economy / Gambling / Re: Coinroll - Dice rolling game | Instant bets | 1% House edge | API on: May 03, 2013, 02:41:17 PM
And about your bitcoin client? I'm only asking because I have heard that the original client will become very slow if there are thousands of bitcoin addresses in your wallet.

Custom software.


FAQ has been updated. There were also some minor UI improvements.
129  Economy / Service Announcements / Re: Bitfetch - Anonymous Remote Torrent Downloading on: May 02, 2013, 04:19:18 PM
Just started my first download... very reasonable price that makes sense to use it... cheers!

However I have an improvement suggestion:  I added a torrent to see how much it would cost, but it did not tell me, just the size.  Also it got rid of the price so I had to open an incognito window and do math (math is hard Smiley ).  It would have been much nicer if it would show me what I needed to deposit to download it, especially now that I have a balance.

Other than that:  great UI!

You're right, since converting this to bytes was kind of an afterthought. I will add some sort of indicator for the amount of bitcoins you need to start a torrent.
130  Economy / Gambling / Re: Coinroll - Dice rolling game | Instant bets | 1% House edge | API on: April 30, 2013, 01:46:38 PM
maybe you should take a look on this thread:
[SUCCESS] Double Spend against a satoshidice loss

Maybe aforementioned system was inspired by that thread.
131  Economy / Gambling / Re: Coinroll - Dice rolling game | Instant bets | 1% House edge | API on: April 30, 2013, 11:15:53 AM
Your missing the point on the double spending. If they win they won't double spend, if they lose they will.

There is a system in place to combat that scenario. Obviously I can't go into specifics.
132  Economy / Gambling / Re: Coinroll - Dice rolling game | Instant bets | 1% House edge | API on: April 30, 2013, 09:56:34 AM
The user id and the password are all run in to each other as you can see.  Maybe put some spaces or something in there?

This what user-select: none supposedly does but Chrome and Firefox throw a hissy fit if you enable it. I will try floating the userid and password or add some spaces on top of the margin.


Edit: also, there's no feedback if the number I type into the 'select game' form is too big.  I'd like it to tell me what the maximum number is at that point, rather than having to switch back to the FAQ or wherever I saw it before.

I will add some sort of feedback.


Edit: Custom games <64175 through <64238 all pay out the exact same multiplier (1.01x).  You should probably use more decimal places for the high-probability low-multiplier games so that the payouts are more fair.  The <64175 game pays out just 1.01x, that's a 1.097% house edge, almost 10% higher than the claimed 1%.  It looks like you're rounding the multiplier down, so the house edge goes higher than 1%, further in the house's favour:

To make things simpler and reduce the decimal digit spam, multipliers are rounded down to 4 significant digits. This makes the effective house edge float between 1% - 1.1% depending on the number. I still think that an 0.05% (on average) difference is insignificant compared to the advertised 1% house edge. Maybe I should add this to the FAQ.


ie. the 100 satoshis I won 'should' have been 109 or 110 satoshis (10% more):

You actually won 10100 satoshis. If you define "won" as the delta between bet and return, then a < 65500 game (not allowed, but just for the sake of argument) would always be in the negative, multiplier rounding or not. Maybe I should have the maximum number set to 60000.


The 'withdraw' popup doesn't have a 'cancel' button or an 'x' in the corner to close it, and escape doesn't get rid of it either.  Clicking 'withdraw' again got rid of it, but that's a little less than obvious.

All popups close if you click outside them. I will make it so that esc works as well.


Other than all that (all of which is really minor) I like how the game works.

Thanks!
133  Economy / Gambling / Re: Coinroll - Dice rolling game | Instant bets | 1% House edge | API on: April 30, 2013, 09:06:29 AM
For now it won't be a problem, but let's assume that you maximum bet go as high as satoshi dice, so you may review this functionality because the double spends:

- sent 500 btc with no fee
- played and lost
- double spend with a generous fee

Edit: This can be (mostly) avoided.


I also saw that every time I refresh the page, a new deposit address is showed to me. so, are all the address showed exclusively mine or they are just temporary address? if they are temporary, you should say for how long they will be assigned to my account.

They are yours. They are assigned to your account forever.

134  Economy / Gambling / Re: Coinroll - Dice Rolling Game | Instant bets | 1% house edge | API on: April 29, 2013, 11:01:10 PM
Cons:
- Got to remember an account key or withdraw before leaving. At least balance remains recoverable if you can sign with one of your deposit address, in case the key is lost.

Cookies are set to expire in 10 years, assuming you don't delete them or visit the website in Incognito mode.
135  Economy / Gambling / Coinroll.it - Dice rolling game | Instant bets | Off-the-chain | 1% House edge on: April 29, 2013, 09:34:14 PM


Coinroll is a new dice rolling game with a few interesting features:

A house edge of only 1%

Unconfirmed deposits
We accept unconfirmed transactions. You can begin playing instantly - no registration is required.

Deferred withdrawals
You can choose to have your winnings sent to an address once your deposit has cleared. Staying on the website while your transaction is queued is not necessary.

Instant bets
Bets are off-the-chain and are processed instantly while still being provably fair. As such, you can bet as low as 0.00001 BTC.

API
An easy-to-use interface is available for those who would like to use Coinroll from the command line or integrate it into their projects.

Custom games
While a few preset games are available, you can set a target number from 1 to 64000 and your win odds and multiplier will be calculated accordingly.

Here's an example of a bet. More information on provability and database dumps are available here.

Betting limits will slowly be increased over the coming weeks.

Come check it out at https://coinroll.it
136  Economy / Service Announcements / Re: Bitfetch - Anonymous Remote Torrent Downloading on: April 24, 2013, 12:56:15 PM
  • Balances have been converted to bytes
  • Minimum torrent cost has been removed
137  Economy / Service Announcements / Re: Bitfetch - Anonymous Remote Torrent Downloading on: April 18, 2013, 07:31:38 PM
Are you also gonna raise prices with bitcoin value falling :/

I will be converting balances to gigabytes to remedy this.


I used Bitfetch yesterday and was very impressed with it. I was actually trying to find it via Google, but couldn't.

I think you might want to add some <meta> tags and verbatim text that at least says "bitcoin torrent download", or something like that. I'm sure it'd come up in the rankings pretty quickly.

Anyways, great job on the site :-).

Thanks. Indeed, I haven't done any SEO yet.
138  Economy / Speculation / Re: MtGox "Cooling Off" again. on: April 13, 2013, 10:23:47 PM
drivel

Yes, processing more than 1 order per second on an orderbook of 11k is truly beyond our technological limits.

/sarcasm off
139  Economy / Service Announcements / Re: [ANN Mt.Gox] Resuming Operation: Now what? on: April 12, 2013, 12:26:53 PM
It is now capable of handling 50 times more of the trades than in the past

Quoted for hilarity.
140  Economy / Service Announcements / Re: [ANN Mt.Gox] Hi everyone, just a quick update on the situation and what happened on: April 11, 2013, 08:59:24 AM
This isn't new. Your engine has been lagging for the past 3 months whenever there is so much as a hint of volume.

Anything more than a few seconds of lag in the real financial world is UNACCEPTABLE. You wasted a lot of people's money yesterday. These people will be taking their business elsewhere.
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