Quote from: edge777 on June 11, 2017, 07:09:57 AM

Quote from: wetsuit on June 11, 2017, 06:35:06 AM

I would love to make the lottery provably fair but unfortunately there is no method of doing so as far as I know. Hence, I have done the next best thing which is to offer users a chance to opt out of the lottery and receive reward points instead if they feel the lottery is rigged. You can do this from the PROFILE page.

I willl offer 1 BTC to anybody who can provide me with a way to make the lottery provably fair in issuing tickets and picking out winners. The system described should be able to handle hundreds of millions of tickets and verification for users should be fairly easy and straightforward. You can post your ideas here and I'll go through them and reward the idea that we use.

Both the free roll and the dice game are provably fair and the website will be going completely ad-free as of today.

You can design a system something like this:
Let's say, Person A bought 5,000 tickets, Person B bought 9,000 tickets, Person C bought 50,000 and Person D bought 1,17,000 tickets

User A : 5,000 tickets
User B : 9,000 tickets
User C : 50,000 tickets
User D : 1,17,000 tickets

Combined, total tickets : 1,81,000
Generate a random number between 0 and 1,81,000

Set a windows like below :

0-5,000--- User A wins
5,000-14,000--- User B wins
9,000-64,000--- User C wins
64,000-1,81,000 ---User D wins // User D with most tickets has the largest window
...

After an iteration, get the user ID who won, out of the system and run it again for second place and so on until you get your 10 winners.

Good Luck!!

Edit: I believe generating a provably fair random number wouldn't be an issue.

how can this method be applied on here when people are getting it from gambling? This is free tickets that they get from wagering a lot of coin. I think there is only less people that really want to buy this tickets

More over, if you are setting that kind of windows, how are you going to divide tons of address out there? And we do not even know if all of that address is real person, how can they even get 1 mil tickets in a week?