Bitcoin Forum

Hi!

I would like to introduce my latest project:

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The Bitcoin Lottery!

http://bitcoin.dyndns.info/bt/


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Feel free to register your bitcoin address and start playing.

Playing value:   0.1 btc to 1 btc

Winning chance: 50%

Every player rolls for the jackpot. So if you lose your round, you have still the change of winning the jackpot.

Instant payout: if you win you will receive your profit instant.


********************************

UPDATE -> 22. Jun. 2011 20:44 h (CET)

Bet minimum: 0.1 BTC
Bet maximum 1.0 BTC

Win Class: Roll 100 - 200 = 150% payout
Jackpot Class: Jackpot Roll 200 = + 90% jackpot payout[/b]

x% -> See details on website.

<- Update end

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How it works:

Step 1:
Register your bitcoin address and send a minimum of 0.1 bitcoins to the shown address.

Step 2:
You have to wait until the bitcoin network confirms your bet. In the meantime you can see your name in the waiting list.

Step 3:
The server checks your ticket. If you win you will get an instant payout.

NOTE:
The Jackpot payout is updated after every players move, hence the payable amount may vary from the amount displayed at the rounds start.

The needed transaction fee is calculated for every transaction and may vary, too.

********************************

I hope you like my little project and that my english is not to bad ;)

Greetings!

Nice work! :)

I'd like to propose, add a login/logout, and allow ppl to simply deposit a larger amount. With bets at 0.1 and transaction fee of 0.01, 10% is lost to bitcoin network.
And add different bet levels, smaller and larger.

1. Login:

If you enter your Bitcoin address again, it will check the database and find your name. But maybe a real login system would be better. But I should have explained the login on the website.


2. Low Bet values

My project works really nice on the testnet, but I am a little afraid now on the real network :)
So I decided to start with low values for testing. If something went wrong, i will pay the winnings by hand.


But I am very happy that the first player gave it a try. Thank you, Ben! Whereever you are! ;)

Regards,

Der Hamburger

I'm trying it out.
Waiting for my payment to be confirmed  :-X

btw, I still don't see myself in the "Waiting for payment confirmation" section.

edit.
oh… damn… ok… that's because I LOST  :(

I am happy to see it works!

@tragor: you have to reload to see your name in the waiting list ... I saw your name. If the transaction is confirmed your name will be displayed in the win or lost area. But there is no waiting list if you win, you name will be displayed instant in the winning area. To see the winning money transaction you have to look into your bitcoin client.

Maybe I should implement a list that shows the outgoing payments (like the waiting list).

Regards,

Der Hamburger

Just sent my 0.1, Wish me luck :)

Have you thought about open-sourcing your algo so we can check it truly is 50% chance?

Also noticed a spelling mistake:


And


I think it would read better as 'still have'

Cool service though, keep up the good work

Edit: lost

Hi Tom,

thx for the spelling corrections, I appreciate that much!

The algo is very easy right now. Every 2nd player has a 100% winning chance. Maybe I should implement a rolling system with 50:50 chance. But only with the current system I can guarantee that there is a winning value.

If I would use a rolling system for regular wins, there will be no value in winning cases. In example if you win two times one after another.

The problem is that I need some more players. At this stage it's easy to guess if you win or lose.

The real competition is to win the jackpot.

I saw you are trying ... so you will understand the system and how it works. You can calculate your risk and decide to play or not. Even if there are more players at the same time you can't calculate it.

... Hmmm, maybe I should implement the rolling system for regular wins and keep some % of the Jackpot to guarantee there will be always a winning value for some regular wins one after another.

I hope you understand what I mean, some english words are missing ...

Greetings!

@tragor

haha, it seems you understand the game ;-)

But just to let you know: depending on your location and connections it is possible that the transaction hash (don't know if that is the right word) of the player next to you is computed faster and confirmed earlier.

So watching the win/lose and waiting list will not work always.

Greetings.

I was trying for the 3rd win (since that's the minimum just to get in par with one initial loss), and i found myself in the middle of 2 other people.
basically the deciding factor has been "how fast you can get your payment confirmed". And I lost again.

So… 2 won, 2 lost.
And i'm down 0.13.

The thing is I'm left with 0.09, so… game over for me.

That was the proof of concept.

On my list you were the first player, Louis was the second, xxx the third.

You were on winning position if the confirmations would have been calculated in that order.

But the payment confirmations arrived in that way:

First: Louis (winner)
Second: YOU (lost, sorry)
Third: XXX (winner)

I am sorry for you, but it's good for the game that counting and watching the list will not work everytime.


@tragor: thx for playing!  8) I will fill up your bitcoin account and send you the needed coins. Whats your bitcoin address?

Greetings,

Der Hamburger

be careful with that, you don't want to create a case or you'll get everyone who lost some coins begging at your door to have them back  ::)
anyway, if you feel like it… there's a hash in my signature, thanks.

xxx right now is playing against himself. not the smartest idea.

He's trying to get the jackpot!

And he rolled a 99 in his last round, which was close but no cigar!

do you think so?
the first two times he simply got stuck in these confirmation-rushes. I suppose now he's just trying to get back on pair.
just like Louis… he started with a loss (like me), and then he got 2 wins. I'm pretty sure he'll try for a 3rd run sooner or later.

btw, i rolled a 97, that was pretty close too  ;D

You should probably implement a decent random number generator.

Not just a plain old php 'rand( int $min, int $max )'

You could maybe include a tiered prizing system like

rand(0,100)

0-40: LOSE
41-50: 50%  of bet
51-60: 100% of bet
61-90: 150% of bet
91-99: 200% of bet
100   : JACKPOT!

Good Idea!

But it must be optimized. What will happen if 10 people win 200% of their bet?
The server account would be empty and the server will not be able to payout the winning values.

What about:

0-50: LOSE
51-69: 5% of Jackpot
70-80: 10% of Jackpot
80-90: 25% of Jackpot
91-99: 50% of Jackpot
100   : JACKPOT!

In that case the winnig profit is bind to the server's account balance.


and btw: Lucker! +1 win to your account  :o

i'd like to get the jackpot, best wishes xxx :)

EDIT
---
forget it, i got the sums all wrong.
let's delete the shame  ;D

Er... "breaking the bank" is a risk that you, the "house" have to take. That's why we allow you to take vigorish (transaction fees). If you're worried about your risk, look at how Keno pays out, or roulette, or craps. Depending on how much risk you want to take as the "house" you can choose which sort of weights you want on winnings. Craps has the lowest payouts for the house, keno the most (13 cents on 100 dollars for craps, 13+ dollars on a hundred dollars for keno)

If you need some help setting your tiered bets up properly i might be able to help you, as long as you don't screw the algorithm up i'd recommend having about 10-100 times more than the maximum bet amount in your "house bank" to ride out statistical anomalies. It'll all work out in the houses favor in the end (and should, since they're paying the bills) - but it can get real choppy if luck goes to your players for a dozen hands :-)

I just tried to enter again and send my 0.1 to the receiving address...

Only this time because i had received winnings the bitcoin application had changed my sending address, Now I don't see my name on the waiting list?

Is it possible for you to refund this transaction or add it to the list or anything?

Thanks

EDIT: You added it when I was the previous winner, causing me to loose lol

Hi tom,

I don't added your address by hand. I checked the database and everything worked as it should. As mentioned before you can not count the entrys in the win/loss or waiting list in order to win.

Sometimes it took some time until the bitcoin server receives the unconfirmed transaction. I don't know why but I think it has to do with the bitcoin networks node connections.

If there are more than one player in the waiting list, the server will deliver the playing order depending on the confirmations.

The latest example was:

Waiting list order:

-> Player 1: Puls....
-> Player 2: Puls...
-> Player 3: Phil...

The server receives the bitcoin transaction block and delivers the following list, depending on confirmation order:

Player 1: Puls....
Player 2: Phil...
Player 3: Puls...

As you see, player 1 bet two times in order to win one. But the confirmation of player 2 was computed faster and so the playing order changed. If you would like to know why the order changed we have to open a thread in the technical discussion area. I am not so deep inside the block-calculation process to answer this question.

I hope that helps.

Kind regards!

@genewitch:
I am open for any ideas. Please be lenient towards me, it's my first bitcoin project and it is the first day running.
But I am very interested in setting up the bets properly.

I see...

For some reason it just took a long time to go through even though I sent to the wrong address (I think)

Cool service, i'll probably play more tomorrow

You used one of your other bitcoin addresses, so my system generates a second account for you. Thats no problem, you can have as many accounts as you like. The profit will send to the linked bitcoin address.

Thx everyone again for the positive feedback.

I liked the ideas and optimized the system. Lets have a look:

NEW:

50% winning chance! (same as before)

Bet minimum: 0.1 BTC
Bet maximum 10.0 BTC

Win Class 1: Roll 50 - 89 = 180% payout
Win Class 2: Roll 90 - 99 = 245% payout
Jackpot Class: Jackpot Roll 100 = 90% jackpot payout

Note:

+ I added 10 bitcoins to the bank. Now everyone can bet a value between 0.1 and 10 bitcoins.
+ I will add a view for the bank account balance in the next future.
- The winning order based on payment confirmation order was removed. Now it's a complete rolling system.

Greetings!

Der Hamburger

wie lange braucht normaler weise es bis die zahlung bestätigt ist? kommt mr gerade etwas lange vor...

In fact I don't know exactly why it took sometimes a very long time until a transfer will be confirmed.


@wombat:

Ja, mir auch! Ich denke das liegt daran, dass gerade nicht genügend Rechner Blocks ausrechnen.

Es kann aber auch sein, dass Dein letzter Transfer ohne Transfer-Gebühr durchgegangen ist. Dann hat der Transfer angeblich eine so geringe Priorität, das andere Transfers mit Gebühr bevorzugt werden.

Das Transfer und Gebührensystem wird aber, wenn man den Bitcoin Entwicklern glauben kann, gerade umgestellt. Die Gebühren werden wohl von 0.01 auf 0.005 sinken, was geringen Transfer Beträgen natürlich zu gute kommt.

Proofed!

http://bitcoin.k8500.com/bt/proof.jpg

Have a look at this screenshot and you will see that some transactions are faster than others!

Transaction 17:31 confirmed with 2
Transaction 17:09 unconfirmed with 0

...

i love it and lose so much.....

Play lower values, so you can play more ;-)

die neue dyndns adresse ist nur sehr langsam erreichbar. eine richtige domain wäre besser.

Vorhin ist irgendwas ganz komisches passiert: Ich habe zweimal gewonnen, es wurde aber angezeigt, dass ich mindestens acht Mal gewonnen hätte, immer zur gleichen Zeit (ich glaube 0:28 Uhr). Bisher wurde mir noch kein Gewinn ausgezahlt, auch nicht der rechtmäßige (vom zweimal gewinnen). Mein Name auf der Seite war miep.

Ich werde das gleich prüfen!

Ich habe vorhin eib bisschen an den Anzeigen umgebaut. Genau genommen den oberen Teil, die Gewinn/Verlust Liste und ein paar Kleinigkeiten am Ende.

Irgendwie scheinen mache Leute nicht richtig lesen zu können oder mein Design ist zu umständlich ;-)

Da hat einer massenhaft 0.01 Beträge transferiert. Und der Mindesteinsatz ist ja 0.1! Bei 0.01 würde ja allein die Transfergebühr den Gewinn auffressen.

So. und nun schaue ich mal nach den Blöcken ...

Hi, danke, hier noch ein Screenshot zu dem Problem den ich gestern Abend gemacht habe, vielleicht hilft der dir ja weiter:

https://i.imgur.com/5moGa.png

And now continue in English  :P :P

Hi miep,

I checked the database history and can't fint any problem.

I implemented a new database field right now and hope that will help in the future. There was a little security bug, that enables multipayout for only one bet. I hope I fixed this bug now. There was a user who bet 0.2 btc and got 10 x the winning profit transfered.

But as shown on your screenshot I will send you the profit in a few minutes.

Kind regards!

@miep

0.5 btc send.

Greetings!

Thanks!

Hey DaMan,

I'm bmwministyle.co.uk ( enjoying the free advertising :P ) Any idea what is going on with my transaction?

PM me if you want proof etc.

Thanks

Hi tom,

I have no idea. I added a transaction info link right now. Check it out.

Greetings.

Finally went through and I won :)

Awesome site

hmm, maybe I should think over the system ^^

But it's a pitty -> some player plays 3 times and lost all 3 games.

it's not a pitty it's a lottery...

If you start being soft you will loose a lot of money

I am addicted! I just keep losing. :(

We updated to the latest server version and now the transfer fee's are dramatically reduced.

thx bitcoin developers!

All calculations regarding fees are updated now. Formerly all payouts were less the transaction fee as stated on the website. But since we watched the server log of the latest server version it is proofed that the bitcoin server used 0.0005 btc in 90% of all payouts. We calculate with 1% and in most of the cases the fee is lower than the minimum of 0.0005.

-> RESULT:

• we removed all fees
• payouts are raised from 154% to 155% and 224% to 225% (because 1% fee was removed)
• all payouts are excactly the payout percentage (even if some players send bets like 0.1099999 btc there might be a difference because of rounding the values.

-> Jackpot:

• we have a new Jackpot peak: 9.4351 BTC

Kind regards,
DaMan

There were many postings on marketplace. To keep this thread complety I will post here, too.

I will try to explain my thoughts and system. If there is a better way I will change it, no problem.

First version of the game:

• 1 account for bank and jackpot
• initial setup: 20 btc added
• one roll 1-100

The jackpot was won 1 time by gordon with about 3,6 btc

The Problem:

I used only one account for playing and jackpot. So if some people win the bank balance gets lower and so the jackpot does. Because it is the same account.
With that system and the winning percentages of 180 and 270% there was no chance to raise the jackpot and make the game interesting. The win/loss percentage was round about the 50%. There was an alert message integrated that will stopp the game if the bank account value gets under 5 btc. Because at that stage the system could not guarantee that all payouts can be processed. In fact the bank balance varies between +/- 30 percent. I would call that well balanced.

I got some feedback and ideas from players and decided to change it.


Version 2

• seperate account for bank and jackpot
• two rolls: one for normal playing, using the bank account. one for the jackpot.
• adjustment of the rates: 154% and 224%

Benefits:

In each round, a fixed percentage can be added to the jackpot. The jackpot will increase steadily and is therefore independent from the normal game.

Problems of version 2:

The fees were deducted from the win. it was also stated on the website. The calculation of the charge transfer was not exact.

There was again some feedback and it was time for the next version.


Version 2.5

• fees are lowered from 3% to 1%, because of the new server version


Version 3, current

• seperate account for bank and jackpot
• two rolls: one for normal playing, using the bank account. one for the jackpot.
• fees were removed, and all fees are paid by bank account
• adjustment of the rates: 155% and 225%


Why two rolls:

The idea was that people who lost their playing round still have a chance at the jackpot.

Rolling system:

playing round: you roll 0-99 (in fact you can roll a 0! and a 99!)

if you rolled:
• 0-49 = no win
• 50-89 = win class 1 (155%)
• 89-99 = win class 2 (225%)

So there are 100 possible rolls.

The jackpot roll:

• 1-100

If you roll the 100 you will receive a 90% jackpot payout.


Winning system example with 2 rolls:

Jackpot value: 0.5 btc

If you bet 1 btc and roll a 60 in the regular round, you will receive 155% of your bet -> 1.55 btc.
If you jackpot roll a 100 in the same round, you will receive the profit from regular round plus the jackpots 90%.

Total payout: 1.55 + 0.495 = 2.045 btc


Winning system example with 1 roll:

If you roll a 60 you will receive 155% payout and you have not a second chance to get the jackpot in this round.


But if I think it's really better to roll only once ;-) It may helps to increase the jackpot.


What happend to the bet values:

Your bet = 100% to bank account.

to Jackpot: 10% will be moved to the Jackpot account
System fee: 5% will be moved to the system fee account (thats my cut: 0.005 btc per 0.1 btc bet)
The rest of 85% remains on the bank account.

The bitcoins on the bank account will be used to pay all transfer fees and winning payouts. If the bank account was less than 10 btc there will be a red warning display that maximum bets of 1 btc are probably not covered. The same message appears for 0.1 btc bets if the bank account is less 2 btc.

That was my approach and the current system. I hope I could clarify some processes. If there are further ideas, corrections etc. -> let me know.


@Auspician:
Extrapolations do not easily perform, as the system and the percentage of shares through user feedback have changed 3-4 times since its release last week.

Until now, the Jackpot was won 3 times. 1st Gordon, 2nd Hyper, 3rd Valdez.

@bitlotto:
I think there is no demonstration the the jackot can't be rigged to go to me. Bitcoin is so anonymous

As long as Bitcoin is anonymous and the transactions are not traceable and there is no unique user IDs, I think it is not possible to deliver a unique proof. If someone can verify the identities of users and transactions the Bitcoin project failed. But personally I would like to have a little bit more informations about transactions. To create a unique account for every user to verify who send/receive a transactoin is not very useful.

At this stage I like to use a modified quotation from slush:

In theory, as the service operator, I could keep the jackpot for myself. I'm not going to do this, but I completely accept that people do not trust the service operator. It is their freedom of choice, and Bitcoin is about freedom.

It is important to me that you understand that my interest is not the jackpot. My interest is that the site is used a lot and people play a lot. My cut are 5% per round, thats my interest.

Of course I have to look that the bank account is balanced. If the account falls too quickly, I either have to reduce the profit rates or say goodbye to the 50%. If it rises slowly, one could raise the profits, or increase the maximum bet value.


The possible next Version

• one roll for winning & jackpot
• a first statistic page

The thing with the hash I have in my mind, but so far had no time to occupy myself so thoroughly.

Kind Regards.

the site looks great, nice design.

Thank you!

If I have a look at the statistics there should be a good chance to get the jackpot in the next 40 playing rounds. But hey, thats onl a guess. 65 rounds played without since I enabled my little statistics page. I have to put it in the right form tonight and than it will be accessable on the website.

Kind regards!

nice work ;D
tried, failed.
it was fun though.

We had to reduce the 50% winning chance to 40% because it was not possible to cover the winning payout in the long term. I was hoping it would work, but in normal playing operation, it is not possible.

The statistics page is on the way!

Kind regards!

Statistics page ready: http://bitcoin.dyndns.info/bt/statistics.php

Please note that the statistics unfortunately starts from today 19:23 h, because I did not save some of the required data fields in the past. I added the fields this evening and I hope it will work now. I have to check the jackpot winner display in the history list as soon as the next player wins.

Kind regards!

The odds of winning keeps changing...

Do you mean the odds display on the statistics page? If so, thats correct, the winning odds will be calculated based on the real win/loss data.

If you mean the homepage -> due to some requests the winning chance was changed back to 50% for tonight and the class quotes were changed to 130% and 160%. The profit should be the same as before with 40% winning chance and slightly increased winning percentages. There are some people who want to test this.

Personally I am not sure what would be the right way: more wins and lower payout percentages or less wins and higher payout percentages. Some players told me it was more fun if there would be more lower wins, instead of less wins with higher payout. The profit should be nearly the same.

Its hard to find the perfect values.

For testing purpose the lower bet value of 0.01 btc was integrated now. But I am not sure if that makes really sense. Anyway it's nice for new people to test the system. (Note: If people bet 0.01 btc, there was no chance to win the jackpot. The jackpot is only accessable with 0.1 or higher bets.)

Kind regards!

For your interest:

Regarding the last night with three jackpot wins in short time, we had to increase the rolling range to 200 to give the jackpot a better chance to grow.

Anyway there is always a chance to win the jackpot two times one after another, but we would like to keep the jackpot wins rare. So it can rise to a really interesting value. I think the rolling range to 200 is still to low, but we'll give it a try.

After two weeks of watching and testing the beta period should be over. It seems the system works nice and there are no errors.

So this is the final setup:

********************************

UPDATE -> 22. Jun. 2011 21:44 h (CET)

Bet minimum: 0.1 BTC
Bet maximum 1.0 BTC

Win Class: Roll 100 - 200 = 150% payout
Jackpot Class: Jackpot Roll 200 = + 90% jackpot payout[/b]

-> See details on website. http://bitcoin.dyndns.info/bt/

<- Update end

********************************

If there will be a surplus revenue, the revenue will be transfered to the jackpot account.

And btw: If you like to test the lottery, you can send a low bet from 0.01 to 0.09 btc. Some people requested that. If you play in minimum bet mode there will be no chance to win the jackpot, because the minimum bet system rolls only from 1 to 199. Everything else works like the regular gameplay.

Kind regards!

Jackpot Update: 6.2767 BTC

Congratulations to Billybob, who won the Jackpot with 10.63 Bitcoins!


I had hoped the jackpot would go higher, but with a rolling range of 1-200 it seems it isn't possible.

Now I have a question:

A. Would you like a small jackpot like that one (about 10 btc) and win more often (like now)?

B. Or should we increase the rolling range and offer a much bigger jackpot, which is really interesting?


For comparison, the winning chance of a real lottery house like real lotto is far higher and about 1:14.000.000.

We have 1:200 right now. Should we leave it like that? Or should we raise it at 1:500 or 1:1000?

What do you think?

Kind regards!

I think we should win more with a smaller jackpot

Maybe I expressed myself wrong.

It's all about the jackpot. The normal game remains as it is. You might just win the jackpot a little more often rather than less often a really big jackpot.

oh..well I rather it more often but I don't represent everyone..

Player Feedback: »Why don't use even/odd number to identify the winner?

top or flop?