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1  Economy / Gambling / Re: BullX.io fair PvP jackpot&coinflip games on: December 17, 2020, 08:41:00 PM
Creating PvP gaming platform doesn't relieve casino from being a fair party in the bet. Even though it's a game between players, casino still must be fair party and must have no control over the result of the bets.

However, I tested Bullx.io and found that site has full control over the bet because -
(i) 10 bitcoin addresses are generated by the site before the game starts
(ii) decoding is shifted by 'n' places depending upon a number which is obtained by the formula unknown to the player

Bullx.io can use this as the backdoor and cheat players in the following two ways -

  • After a player creates the coinflip game, site now has access to the following information - 10 bitcoin addresses, amount of the game, UNIX timestamp of the player. Site can loop over the next 10 - 60 seconds and select the UNIX timestamp for the second player which when used in the formula selects 'a bitcoin address' among 10 addresses such that results favor the second player. Now Bullx.io can pose as the genuine site player and join the coinflip as the second player and win the bet.

  • After a player creates the coinflip game, site now has access to the following information - 10 bitcoin addresses, amount of the game, UNIX timestamp of the player. Bullx.io can now join the coinflip at the random UNIX timestamp as the second player. When bitcoin address is selected based on the formula, Bullx.io can then shift the characters of the address for decoding such that the result favors the second player and win the bet. Since formula of shifting the characters is not known to the players, no one will know if characters are shifted as per the formula or not.

To be honest, I really like the way you thought of using bitcoin addresses in provably fair mechanism and converting Base58 to Base10 in equally distributed probability to calculate the final result. But the fundamental of your provably fair script is wrong! Casino mustn't have complete control over the result generation process else it can't be called Provably Fair.

By the way, isn't 10% on winnings too high as the commission?

Thanks for the analysis.
"decoding is shifted by 'n' places depending upon a number which is obtained by the formula unknown to the player"

About the formula unknown to the player https://prnt.sc/w4x0mn
The shift will be equal to the last digit obtained from the formula.


Yes, we thought about coinflip long enough. Entering the game at the right moment is quite difficult based on the code execution time it can take up to 50 ms to send one request. But I think this is quite possible under ideal conditions. We will solve this problem by adding one more value that we cannot find out until the end of the game.

I have already answered about the shift formula

The site does not indicate anywhere that the commission is 10%. We have a 5% commission on jackpot and coinflip.

Currently the commission is:
5% (for jackpot); 5% (for a coinflip); 10% of the net house Profit is taken by the daily jackpot(0.5%)
2  Economy / Gambling / Re: BullX.io fair PvP jackpot&coinflip games on: December 15, 2020, 11:22:23 PM
please do check the coin flip section it says the minimum is 100 sats deposit I tried to deposit 100 sats coming from the bonus from it did not accept my deposit even the 200 sats was not accepted i ended up betting 500 sats for this game, I hope you can fix it




Yeah, thanks. We will fix that.
3  Economy / Gambling / Re: BullX.io fair PvP jackpot&coinflip games on: December 15, 2020, 10:48:29 PM
Noticed that the number of online users is already in hundred.



Wondering if that is actual number of users?
Also, are you planning to add more crypto other than btc, maybe DOGE or LTC or XRP?
At least their tx fee is much lower than BTC.



At the moment, the counter indicates all site visitors. We will make it show only registered players.
We want to make an additional deposit with various coins that will be converted to bitcoin.

Given the level of ANN threads for new platforms on here and seeing the simple introduction made I was but skeptical. Having browsed the website I get it - simplicity is the main theme here - weirdly enough I do like it. It seems to work really well, though unlike many casinos by comparison this looks like it is in its testing phase but presumably this is the beginning.

I haven't yet tried any functionality - that's next on my list but so far so good  Cool

Thank you, we tried to make the site as simple as possible so as not to overload the players' attention.

Welcome to the forum Bullx.io!

Site do looks plain and simple and with that jackpot game or even with coin flip would really give out some confusion yet i cant determine directly with first glance
on where the game is happening due to lots of text and lacking of emphasizing the game itself where you should really be changing that.
Also, frankly speaking on where flip coins and jackpot type of games doesnt really get that much of attention or you would really be having some hard time
on getting players. Good luck!


Thanks for your feedback.

I highly recommend that you get a copper member account so you can post images and maximize the use of your signature, you can also hire announcement designers to make your project appealing to gamblers, the gambling industry competition is very high, you need to beef up the marketing of your gambling site and you can start by creating a professional-looking announcement thread.


Thanks, we will definitely do it.
4  Economy / Gambling / Re: BullX.io fair PvP jackpot&coinflip games on: December 15, 2020, 09:32:36 PM
You won't be adding a casino but you will be adding a sports betting on your website, well that's just great another bookie will be coming here do you have any ideal date when will that be implemented on your website?


Next year we will work on it.

I would like to ask if we can place those free bitcoins to your jackpot so that was a daily draw jackpot right? by the way it looks like your games is limited to player to player is there a chance you would add more player to player games?

Yes, you can fulfill the conditions of the daily jackpot with free coins and take part in it. 20% of net house profit goes to the daily jackpot.
There will be only two games on the site at the moment.

I would like to ask if we can place those free bitcoins to your jackpot so that was a daily draw jackpot right? by the way it looks like your games is limited to player to player is there a chance you would add more player to player games?

PVP games as mentioned are really hard to maintain players. But if they will stick to it, maybe add more games to give more options to players.

Also, I saw that the min withdrawal is 20k sats, how much will be deducted for withdrawal fee or is it free withdrawal?


Withdrawal fee depends on the current workload of the bitcoin mempool, it changes automatically.
We provide two types of payments, instant individual and group payments every 15-30 minutes.
5  Economy / Gambling / Re: BullX.io fair PvP jackpot&coinflip games on: December 15, 2020, 06:26:44 PM
it would be good if the coin appeared in the Coinflip spinning, to give it a touch of emotion. Doing something a little lively, that helps a lot and attracts.
why . is the coin not animated ? adding animation in the game indeed makes it more thrilling  and fun  .

reading other comments makes me aware that its possible to add bots in a pvp game but would that kill the essence of being a pvp game ? i like full pvp better because i have that feeling that bot can cheat me or the site can program the bot to make them win . you guys like that to happen ?

and if we want to play instantly , we have gambling sites that are not pvp .

We have animation, this
If your animation isn't showing, try clearing the cache for the site.

Our site has an interesting random system. It is based on the generation of bitcoin addresses, time, amount of bets, number of bets, etc. The choice of the winner is determined only at the end of the game and the outcome of the game can be influenced by any bet at the end. We tried to make such a system so as not to be able to change it during the game from any side. We do not know the outcome of the game during the game or at the beginning, the winner of the game is known only when all bets are made.
If there are bots on the site, they will have the same chances of winning as any other players.

welcome to the forum, i know you are new to the forum but may i ask if soon you will be adding more games in your website as i've seen you only have 2 games which is jackpot and coinflip. may i ask if you would limit yourself to pvp games or you would soon add more casino games?

There will be only two games at the moment. We want to move towards PvP games. The casino is not planned to be added. There are plans to add a system of betting on sports events with odds based on the bet amounts
6  Economy / Gambling / Re: BullX.io fair PvP jackpot&coinflip games on: December 15, 2020, 05:42:25 PM

Welcome to the forum,

It has a great chance of being successful, the fact that a bonus to try the Jackpot and Coinflip games is very good, although I have a problem, I have not been able to play coinflip because it says that I have to make the minimum deposit, with the balance that they give in the bonus is not enough or do you have to deposit?

You can play coinflip without a deposit. In order to enter the room, drag the slider to the right side. https://prnt.sc/w39dih

The site has just passed the beta test, some errors are possible. Together with you we can fix them and make the site better Wink

What a detail, I saw that just putting the amount was enough, in fact now if I can place my bets, thank you very much, it would be good if the coin appeared in the Coinflip spinning, to give it a touch of emotion. Doing something a little lively, that helps a lot and attracts.


We will gradually add new features. There is a coin in coinflip at the moment.

There are currently no plans to add any bots. We will try to gain an active audience without bots:)

There's also a website here which also have a PVP game but it turns out it doesn't gain too much popularity due to the long time of waiting for players and they have an option to play with bots (Against the site) so they would be able to play immediately without waiting for other players to join. If you would be able to run a good promotion or good strategy I'm pretty sure you would be able to get active audiences.

Yes, we know it's quite difficult to get an audience for PvP sites. If we have the same problem, we will add bots or some other functionality. Thanks for the information.
7  Economy / Gambling / Re: BullX.io fair PvP jackpot&coinflip games on: December 15, 2020, 02:51:35 PM
Welcome to the forum! I browse your terms and see this one. May I ask about the kyc are you going to ask us personal information also I would like to ask if you have a license to operate? I've seen most of the gambling sites that ask kyc are gambling sites that have a license but upon looking in your website you don't have any. Is there a chance in the future that you will be having one?

image loading...

There is no license at the moment. It is planned to use the license in the future. At the moment, this information has been removed from terms.

Welcome to the forum,

It has a great chance of being successful, the fact that a bonus to try the Jackpot and Coinflip games is very good, although I have a problem, I have not been able to play coinflip because it says that I have to make the minimum deposit, with the balance that they give in the bonus is not enough or do you have to deposit?

You can play coinflip without a deposit. In order to enter the room, drag the slider to the right side. https://prnt.sc/w39dih

The site has just passed the beta test, some errors are possible. Together with you we can fix them and make the site better Wink

Welcome BullX.io it's nice to see a PVP gambling games by the way may I ask if what's your current available currency also do you have a feature where in we could add bots to play with because sometimes it might take some time to wait for other players and instead just use a bot as an alternative.

There are currently no plans to add any bots. We will try to gain an active audience without bots:)

8  Economy / Gambling / BullX.io fair PvP jackpot&coinflip games on: December 15, 2020, 01:46:07 PM
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