FairProof - the simplest provably fair bitcoin lottery (1.9 house fee)

[FairProof]

FairProof is the simplest provably fair bitcoin lottery.

The main point of the game is as easy as ABC. You top up your account for a certain amount and choose the range where you think the winning figure falls (from 0 to 99). You get your profit - the amount specified under the input field before you start the game - if you hit the bull's eye and lose the bet if you miss it.

The fair-play lottery is not just a catchphrase. Each drawing is associated with encrypted data which you can use to find out whether this or that figure was really chosen before you made your bet.

We do not use your personal data and get the lottery anonymity secured via cookies. Please make sure that you have cookies switched on in your browser settings.

FairProof benefits:

• provably fair
• instant withdrawals
• instant deposit
• fully anonymous
• 1.9% house fee
• unique URL of account
• 10% of profit is given to EFF

Good luck at challenging the probability theory!

SPWire about FairProof

[masterluc]

Nice. Check my top: https://bitcointalk.org/index.php?topic=279647.0

[FairProof]

Nice. Check my top: https://bitcointalk.org/index.php?topic=279647.0

Ok, my account is queued for addition.  ;

[Dabs]

How do you change the client seed?

[Zaih]

Another lotto..

I feel like these have become some what a lost cause with opportunities to simply bet on SD addresses with high payouts or the higher PrimeDice & Just-Dice multipliers.

Best of luck none the less!

[Dabs]

It's not even a lotto or a raffle. It's more like a dice game. You bet bigger or smaller, he just changed the names. And my question remains unanswered. I can change it by clicking randomize, but how does a player set it to a custom value himself?

[FairProof]

How do you change the client seed?

Randomize function changes both seeds: server and client.
You can do randomize multiple times.

[knowitnothing]

How do you change the client seed?

Randomize function changes both seeds: server and client.
You can do randomize multiple times.

But I cannot pick my own user seed, that is the issue.

Also, why the 7% edge ?

[FairProof]

Another lotto..

I feel like these have become some what a lost cause with opportunities to simply bet on SD addresses with high payouts or the higher PrimeDice & Just-Dice multipliers.

Best of luck none the less!

Tnank you!

Usability of mentioned games leaves much to be desired, so I wanted to make the simplest and user-friendly lottery/dice game.

[KingOfSports]

Usability means nothing, what matters is the house edge. With your 5% or more edge, you'll be lucky to still be around in a couple weeks. No one will use your site with edges of .50% to 2% available, who cares about the graphics which such a huge difference. If I spend $1,000,000 on just-dice for example, I expect to lose $10,000. If I play on your site, I expect to lose $50,000. $40,000 difference? Yeah I'll take the unappealing just-dice layout over a fancy site anyday. And take my $40,000 savings and buy a new car.

[FairProof]

How do you change the client seed?

Randomize function changes both seeds: server and client.
You can do randomize multiple times.

But I cannot pick my own user seed, that is the issue.

Also, why the 7% edge ?

If you can set a user seed, than you'll get a number beforehand.

According to calculations, 7% is a minimum profitability edge.

[KingOfSports]

How do you change the client seed?

Randomize function changes both seeds: server and client.
You can do randomize multiple times.

But I cannot pick my own user seed, that is the issue.

Also, why the 7% edge ?

If you can set a user seed, than you'll get a number beforehand.

According to calculations, 7% is a minimum profitability edge.

Go look at Just-Dice. They're profitable with 1% edge...7% min my ass. Its all about making your maximum wagers fit your bankroll, such as 1% max profit of your bankroll.

I can spout off 10+ BTC provably fair gambling sites with <5% house edge that have been VERY profitable for the owners.

[Dabs]

If you can not set your own seed, this is not fair.

[monbux]

7% house bet for min. bet, a bit too much.

[FairProof]

I'll make the changes so user would be able to set his own client seed.
Also house edge will be lowered.

Thank you for the feedback!

[carface]

How do you change the client seed?

Randomize function changes both seeds: server and client.
You can do randomize multiple times.

What do you mean by server and client seeds and hashing speed? How does it apply to your site and why does it make your site fair in your opinion?

[b!z]

I'll make the changes so user would be able to set his own client seed.
Also house edge will be lowered.

Thank you for the feedback!

Lower the house edge to 0.1%, you will have the best house edge ;-)

[FairProof]

Game updates:

- house edge is reduced to 1.9%
- improved game mechanics: do multiple bets in one click
- now you can set your own client seed
- small bugs are fixed

[FairProof]

Check 5 lucky devils for the last 24 hours:
DATE & TIME                   BET          MULTIPLIER   WIN
13:07:31 08/OCT/2013   0.590400   98.10   57.327840
07:47:01 09/OCT/2013   0.920000   49.05   44.206000
00:12:55 09/OCT/2013   0.800000   49.05   38.440000
03:44:25 09/OCT/2013   1.000000   32.70   31.700000
06:17:21 09/OCT/2013   1.000000   32.70   31.700000

[b!z]

You have two threads open - this one and https://bitcointalk.org/index.php?topic=286972.0

You might want to close one of them.