As posted by you earlier your total dice wagered was 500 btc
With the formula posted by FJ, your airdrop would be 0.0495 btc

you can tip the rest to my btc address 

That's absurd. Maybe you should put some time reading what i wrote on my previous post. It wouldn't be that hard to calculate the effected rolls and players
Though less than half of the refund money will ever be withdrawn

Not really. They should be credited when they reimburse the players.



Exactly. And i don't think it would take more than few hours to figure out which roll numbers were incorrectly treated as loss
They just need to loop through all the bets and check whether the side is Roll Over and Game === roll number.

Since there are 11.2 Billion rolls history. The amount of incorrectly treated rolls would be somewhere 448K considering 40% of the rolls were "Roll over"
Though i would love to hear some stats from your side



I wasn't offered any bug bounty when the issue was resolved. I had to ask for it. So they offered 0.02 btc for years long bug
Had to complain about the amount offered for such huge bug, so they offered 0.1 btc which i was to either accept or reject



Whether it was done deliberately or overlooked, this is the subject we can only speculate about though the bug is really silly hence never found
Crediting the users back would be pretty darn easy. They would only need to credit about half a million rolls. Not a big deal for a dice game



I was about to ask this question to FJ when the issue was resolved but then i found few more bugs which showed signs of an exploit but ended up being just visual bugs and nothing serious



Not really that long. Just few hours to figure out the rolls effected and additional few hours to reimburse the effected players
And i got only 0.1 btc for the bug bounty. Would love to know how much you were awarded



Thought so. Didn't have much option at the end. I was supposed to either accept or reject an offer of 0.1 btc

The error is resolved. Please check the main post for the update

Getting a specific number is hard if you look for it. In FJ it's 1 in 10000
But scripts make the work easier. Being a programmer has it's advantage

Not sure how you did your maths but the off-by-one error concerned here benefits the House and not the player

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New update. Please check the main post

The example shown is according to 990x payout. Main post has been updated to reflect this change but the calculation is correct
I simply assumed people would know that it's 990x payout since i mentioned that before



The fee is correct. The higher your payout is the higher the fee you pay
For a 2x payout which most people do, it's 1.01%, for 10x it's 1.09% and the highest it can go is 10.891% for 990x

What if the user simply wanted to play dice by depositing funds and not claiming any bonus ? They should be allowed to withdraw

Is it true @FortuneJack ?


It is indeed. The edge goes as high as 10.891% from their highest multiplier 990x

Edit 5: Final update

The issue was recognized by the Fortunejack yesterday. Today around 11:45 UTC a new update was pushed
Hence the off-by-one error resolved.
Screenshot of the confirmation: https://imgur.com/a/mgH5Pzo
I checked the roll numbers and everything looks perfect.

I was also given a bug bounty when i asked for it.
So i guess the case is closed. I will still keep it open for any further discussions and questions

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So i was checking out the payout numbers in the Dice game of FortuneJack. I spotted something wrong

Normally in a dice rolls you have numbers between 0 to 99.99 resulting in a total of 10000 numbers.
But Fortunejack seems to be invalidating roll 00.00 making it only 9999 numbers. Even the FAQ section of their dice says "The roll numbers between 0 and 99.99 ..."

So i am going to take example of Primedice here

For a 2x payout

In primedice, we have Roll under 49.50 (0 to 49.49 giving 4950 numbers) and Roll over 50.49 (50.50 to 99.99 giving 4950 numbers)
In fortunejack, we have Roll under 49.50 (00.01 to 49.49 giving 4949 number) and Roll over 50.50 (50.51 to 99.99 giving 4949 numbers)

For a 990x payout

In primedice, we have Roll under 0.10 (0 to 0.09 giving 10 numbers) and Roll over 99.89 (99.90 to 99.99 giving 10 numbers)
In fortunejack, we have Roll under 0.10 (00.01 to 0.09 giving 9 numbers) and Roll over 99.90 (99.91 to 99.99 giving 9 numbers)

Fortunejack calls it 0.1% win chance but technically it's 0.09%


FortuneJack

If you bet 10 satoshi 9999 times (0 is not counted) at 990x payout on FJ, you are to lose 9990 times and win 9 times.
Total bet amount = 10 * 9999 = 99990 satoshi
Total Win amount = 9 * 9900 = 89100 satoshi
Total lose amount = 99990 - 89100 = 10890 satoshi

Total fee = 10890/99990 = 10.89 %

PrimeDice

If you bet 10 satoshi 10000 times at 990x payout on PD, you are to lose 9990 times and win 10 times
Total bet amount = 10 * 10000 = 100000 satoshi
Total win amount = 10 * 9900 = 99000 satoshi
Total lose amount = 100000 - 99000 = 1000 satoshi

Total fee = 1000/100000 = 1 %


I even asked FortuneJack about this issue this was their reply : https://imgur.com/a/W9Qwz9I

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Edit : For a 10x payout the fee goes to 1.09% while they promise a house edge of 1%

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Edit2 : It looks like they have had this problem since they started : https://www.youtube.com/watch?v=Slh4k8yM11o

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Edit3: This is a 4 years old video on youtube which concerns this issue : https://www.youtube.com/watch?v=jwtLPWjVxYI
The guy is using 6x payout for Roll over 83.50 But it should actually be 83.49

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Edit4: Update

It looks like their support guy wasn't looking very hard. Here are they apologizing about miscommunication : https://imgur.com/a/NAqLzrr
So 0 is counted. Of course i didn't just believe it but verified myself by running a script in the All bets page.

Now that we have 10000 possible numbers instead of 9999, We got a different problem
Fortunejack dice gives different Win chance for Roll under and Roll over.

For a 2x payout
In fortunejack, we have Roll under 49.50 (00.00 to 49.49 giving 4950 number) and Roll over 50.50 (50.51 to 99.99 giving 4949 numbers)

For a 990x payout
In fortunejack, we have Roll under 0.10 (00.00 to 0.09 giving 10 numbers) and Roll over 99.90 (99.91 to 99.99 giving 9 numbers)

So if i were to bet on FJ Dice, i would have a correct winning chance for Roll under but incorrect winning chance if i decided to go with Roll over
Not to mention the outrageous fee of up to 10.891% for Roll over

Here i am mentioning the concern : https://imgur.com/a/7xaFPtS
The issue is now under Investigation : https://imgur.com/a/rllgfZq

What boggles me is nobody care to notice this issue. FJ benefited from it for all these years and the users were mislead by an incorrect information.