The Bitcoin Blackjack ♦️ Bitjack | Try the Beta

[NotATether]

Based on the bet history, most bets that are higher than 100 bits were lost bets. I did not check all pages of the bets history but I can see some 10,000 bits losing bets. Shouldn't you make some profit from those 10,000 bits losing bets? That's even 3x bigger than your bankroll.

If anything, the majority of those bits would be going to the bankroll, not his pocket - Only house edge profits (they are usually subtracted from the total bet whether it's a win or a loss) can be pocketed by the house.

So that would make to be several hundred bits at the highest.

[Jawhead999]

I like the concept of your casino, but the bad thing is you'll be hard or impossible to get a gambling license. This make people is hard to trust your sites since there're so many thing need to be answered in public.

1. How we can sure the user ID generated on your URL is safe? is there any way to verify it?
2. Can you add 2FA before user can log in with unique code generated/UID?
3. Your slogan Hack us you mean you're pretty sure your code is secured, but why you still faced a vulnerability in your casino?

Just for information you can use this sites https://www.toolsley.com/hash.html to validate the cards hash, just copy the deck cards and you will see an exact hash on SHA256 to validate.

[roynx98]

Perhaps put this project on hold for the moment?

Doesn't look the best on your brand if you put out an unfinished product that can't even be used properly.

Also, I'd highly suggest that you start with a higher bankroll - 100 bit max bet is a joke, this is the base bet for a lot of players.

Yes, it was bad   , sorry, the problem was that the house money was empty due to the over bets,
so if you win it would be impossible to pay you but It's already fixed.

I want to increase the bankroll and the max bet, just I want to make sure that there are not vulnerabilities.

[roynx98]

The bankroll was around 3000 bits, I've lost most of it  , there is a vulnerability, the max bet is just 100 bits, but the people hacked it to bet more.

Based on the bet history, most bets that are higher than 100 bits were lost bets. I did not check all pages of the bets history but I can see some 10,000 bits losing bets. Shouldn't you make some profit from those 10,000 bits losing bets? That's even 3x bigger than your bankroll. Coming up to the word "hacked", is it appropriate to accuse player hack your site while there is no rules on your site about the max bet? You allow the bets and there are losing bets too, how can it be called by hacked?

The thing is that game does not allow you to make beats greater than 100 bits,
but it seems that someone modified the request to make it bigger, and our backend code had some error to validate it.

So we did not make any profit, those bet were fakes.

[roynx98]

I like the concept of your casino, but the bad thing is you'll be hard or impossible to get a gambling license. This make people is hard to trust your sites since there're so many thing need to be answered in public.

1. How we can sure the user ID generated on your URL is safe? is there any way to gambling?
2. Can you add 2FA before user can log in with unique code generated/UID?
3. Your slogan Hack us you mean you're pretty sure your code is secured, but why you still faced a vulnerability in your casino?

Just for information you can use this sites https://www.toolsley.com/hash.html to validate the cards hash, just copy the deck cards and you will see an exact hash on SHA256 to validate.

Than you  , Yes the gambling license it will be hard  

I'll answer your questions:

1) No, there is no way to verify it. It's just a bunch of random data. The id can be anything, even you can create you own, just modify the string and it will be another account.
    maybe i'll change it, I think all the ids can start from a seed so anybody can very them.
2) Interesting   it can be a good addition.
3) Hehe, it was just a mock, I can not guarantee the security of the site at this moment ,  I'm working alone in this project and just on my free time

Thank you for sharing the SHA256 tool  

[NotATether]

3. Your slogan Hack us you mean you're pretty sure your code is secured, but why you still faced a vulnerability in your casino?

OK that's like putting a huge bullseye for hackers on your casino.

Just for information you can use this sites https://www.toolsley.com/hash.html to validate the cards hash, just copy the deck cards and you will see an exact hash on SHA256 to validate.

I would host this locally if it's even possible, because as I mentioned in a previous post, DNS hijacking is a real thing and can send back different validations or even hashes. Do not make a network request to that resource in production.


@roynx98

I noticed you posted a 50 bits promo code here just now but removed it. I'm the one that used it (I think they're still one-time use?).

I wanted to see how your bankroll would withstand a few bets so I was gambling 10 bits at a time for most hands.

As I expected, I eventually lost all that bonus money after going as high as 110 bits at one point. So it at least makes me feel better that you have some kind of house edge.

I'm not too comfortable that you set the Blackjack payout to 30 bits. I know it's rare, and a streak of losing (as in theoretically impossible to win) hands swallowed all those bits - including a 50bits bet I placed towards the end of the run after a series of 10 bits, but consider the possibility of someone striking lucky and hits blackjack getting the triple payout and immediately withdrawing.

Given that 50bits is the max bet, a 150bits win can still punch a huge hole in your [now depleted] bankroll.

[roynx98]

3. Your slogan Hack us you mean you're pretty sure your code is secured, but why you still faced a vulnerability in your casino?

OK that's like putting a huge bullseye for hackers on your casino.

Just for information you can use this sites https://www.toolsley.com/hash.html to validate the cards hash, just copy the deck cards and you will see an exact hash on SHA256 to validate.

I would host this locally if it's even possible, because as I mentioned in a previous post, DNS hijacking is a real thing and can send back different validations or even hashes. Do not make a network request to that resource in production.


@roynx98

I noticed you posted a 50 bits promo code here just now but removed it. I'm the one that used it (I think they're still one-time use?).

I wanted to see how your bankroll would withstand a few bets so I was gambling 10 bits at a time for most hands.

As I expected, I eventually lost all that bonus money after going as high as 110 bits at one point. So it at least makes me feel better that you have some kind of house edge.

I'm not too comfortable that you set the Blackjack payout to 30 bits. I know it's rare, and a streak of losing (as in theoretically impossible to win) hands swallowed all those bits - including a 50bits bet I placed towards the end of the run after a series of 10 bits, but consider the possibility of someone striking lucky and hits blackjack getting the triple payout and immediately withdrawing.

Given that 50bits is the max bet, a 150bits win can still punch a huge hole in your [now depleted] bankroll.

Mmm, the cards are picked randomly, any ideas of how demonstrate that the house does not have any edge?  

I want to increase the bankroll and the max bet but I'm a little bit afraid  

[NotATether]

Mmm, the cards are picked randomly, any ideas of how demonstrate that the house does not have any edge?  

I want to increase the bankroll and the max bet but I'm a little bit afraid  

I used your second promo code to do successive 50bit max bets - inside the same room I used last time - until I went bust. Ended up losing it all after just 2 hands 

Try running a test version of your casino locally, generate and keep betting 10bits bets, like 5000 of them, then record how many of each you won or lost (disregard all "push" results for this study).

If you get more losses than wins then you have a positive house edge, otherwise you have a negative house edge and you should immediately inspect your RNG to see if it has any flaws that are making such predictable numbers.

[maestro20]

I think you should close the project and not waste your time and money.
I don't see any point in playing in your project.
If I borrow $ 1000 and win $ 2000, I understand that I will not be able to withdraw.
I generally keep quiet about the maximum rate.

[tatibih758]

give another promocode

[DarkStar_]

Based on the bet history, most bets that are higher than 100 bits were lost bets. I did not check all pages of the bets history but I can see some 10,000 bits losing bets. Shouldn't you make some profit from those 10,000 bits losing bets? That's even 3x bigger than your bankroll.

If anything, the majority of those bits would be going to the bankroll, not his pocket - Only house edge profits (they are usually subtracted from the total bet whether it's a win or a loss) can be pocketed by the house.

So that would make to be several hundred bits at the highest.

In this case, the bankroll is effectively his pocket. While his expected profit is the house edge multiplied by the bet, his actual profit depends on how the bets end up going. If he did profit 10,000 bits from a losing bet, there's nothing stopping him from taking them as profit. Expected profit is simply the expected value of each bet and doesn't represent exactly what will happen as users play bets.

I noticed you posted a 50 bits promo code here just now but removed it. I'm the one that used it (I think they're still one-time use?).

I wanted to see how your bankroll would withstand a few bets so I was gambling 10 bits at a time for most hands.

As I expected, I eventually lost all that bonus money after going as high as 110 bits at one point. So it at least makes me feel better that you have some kind of house edge.

Losing all of your balance doesn't mean that there's a house edge. It could very well be a result of variance, especially if the house edge is close to 0% (either positive/negative). You also had a very very small sample size.

Mmm, the cards are picked randomly, any ideas of how demonstrate that the house does not have any edge? 

I want to increase the bankroll and the max bet but I'm a little bit afraid 

I can't seem to find the rules used by your game of blackjack. If you know what they are, you can plug all of the values into a blackjack house edge calculator to figure out what kind of edge you have. If the set of rules is unique, your best bet might be to run a very large number of simulations to determine what your house edge is approximately.

[notblox1]

I think that using mBTC (milibits) and sats would be a better idea than Bits, more people are familiar with them from other betting websites.
Better remove that sign Don't hack us from top left corner, and it will motive people more to really try and hack you.

[bitgov]

* No registration
When you click 'New game', you can play immediately, you will be redirected to a play URL,
that URL is like your password so please save it in a safe place,
whatever person with that URL could play with your money.

I don't know about the other players, but this form of registration seems extremely dangerous to me. It is possible that for someone it will be a very convenient form of registration, but I am afraid to deposit money at an address that is not even secured with a password.

[roynx98]

I think you should close the project and not waste your time and money.
I don't see any point in playing in your project.
If I borrow $ 1000 and win $ 2000, I understand that I will not be able to withdraw.
I generally keep quiet about the maximum rate.

But it would be almost impossible to win 2000, right now the maximum bet it is only 50 (I will increase it soon).

[huynhthai12384]

may i ask what is promo code ?

[sovie]

may i ask what is promo code ?

This is the last piece of information about the codes:

Sorry that code was already used and It can be only used once, I'll share new a ones as son a I fix some vulnerabilities, a few hours back somebody did bets that were too big. The house has lost all its money  

Since the new codes haven't been released yet, it's easy to guess that something still is being improved on the website. A little patience..

[roynx98]

Win Bitcoins playing only Blackjack https://playbitjack.com/

Features
* No registration
When you click 'New game', you can play immediately, you will be redirected to a play URL,
that URL is like your password so please save it in a safe place,
whatever person with that URL could play with your money.

* Promo codes
Bitjack supports promo codes, when they are used you will receive free Bitcoins to your account immediately.
You can withdraw the money any time  

To use the promo codes, simply click on 'New Game', then 'Deposit' and enter your code.

To request for a promo code   ask for it on:
Twitter: https://twitter.com/Mitosys3
Or send me an email at roynx98@gmail.com

* All the game are public
On the home page you will see all the games in real time together with the hash of their cards,
so you can be sure that your cards were chosen randomly at the beginning of each game.

Features on development
* Affiliate Link

Latest info about Bitjack
Max bet: 50 bits
House bankroll:l 1999 bits
Number of games: 3510

Thanks to the people requesting promo codes,  
please request them on my twitter(https://twitter.com/Mitosys3)

[roynx98]

Based on the bet history, most bets that are higher than 100 bits were lost bets. I did not check all pages of the bets history but I can see some 10,000 bits losing bets. Shouldn't you make some profit from those 10,000 bits losing bets? That's even 3x bigger than your bankroll.

If anything, the majority of those bits would be going to the bankroll, not his pocket - Only house edge profits (they are usually subtracted from the total bet whether it's a win or a loss) can be pocketed by the house.

So that would make to be several hundred bits at the highest.

In this case, the bankroll is effectively his pocket. While his expected profit is the house edge multiplied by the bet, his actual profit depends on how the bets end up going. If he did profit 10,000 bits from a losing bet, there's nothing stopping him from taking them as profit. Expected profit is simply the expected value of each bet and doesn't represent exactly what will happen as users play bets.

I noticed you posted a 50 bits promo code here just now but removed it. I'm the one that used it (I think they're still one-time use?).

I wanted to see how your bankroll would withstand a few bets so I was gambling 10 bits at a time for most hands.

As I expected, I eventually lost all that bonus money after going as high as 110 bits at one point. So it at least makes me feel better that you have some kind of house edge.

Losing all of your balance doesn't mean that there's a house edge. It could very well be a result of variance, especially if the house edge is close to 0% (either positive/negative). You also had a very very small sample size.

Mmm, the cards are picked randomly, any ideas of how demonstrate that the house does not have any edge? 

I want to increase the bankroll and the max bet but I'm a little bit afraid 

I can't seem to find the rules used by your game of blackjack. If you know what they are, you can plug all of the values into a blackjack house edge calculator to figure out what kind of edge you have. If the set of rules is unique, your best bet might be to run a very large number of simulations to determine what your house edge is approximately.

Thank you for sharing the house edge calculator, I'll use it  also I'll post the blackjack rules that I implemented.

[roynx98]

I think that using mBTC (milibits) and sats would be a better idea than Bits, more people are familiar with them from other betting websites.
Better remove that sign Don't hack us from top left corner, and it will motive people more to really try and hack you.

Hmm, I used bits because I didn't want to use fractions or  numbers too big for bets.
But maybe the use of mBTC can be good for larger bets.

I've change message, hehe, it was a silly idea, 

[tatibih758]

cant withdraw any, get error. maybe you dont have money?


and max bet now 10 bits?? omg 10 bits...it too small for betting