Coinplaycenter

coinplaycenter

Have you ever checked coinplaycenter.com? We are the founders of first legit lottery game using XLM payments for tickets.

Every comment welcome.

Torkus

I like the idea, but I'd only trust a site that saves every ticket on the blockchain and are open to scrutiny to avoid manipulations. But the site looks nice and plenty of info from previous draws, I was thinking on creating a Kino site like this one and that's exactly how I'd do it. My only advice would be to lower the number of balls to 25 to make the odds more accessible, the prize is already good on the 100k but that's only verifiable if we can see all the tickets in one place like the blockchain.

Is there a rollover when nobody hits the jackpot? That should be an extra incentive when you see it grow into the millions, better marketing and more virality.

coinplaycenter

We appreciate your reply. But how would be every ticket saved on the blockchain? Wouldnt be vulnerable to attacks a public algo of draw with a seed of the blockchain?

Yes there is a rollover every time nobody hits the jackpot.

Torkus

Here is an idea how I'd implement my own Lotto:

For every drawing generate an address
People will buy tickets for that drawing
Store every ticket sold on the data field of that address key:val as address:numbers using the ManageData operation
Show on the page of the day the public key for the drawing so people can audit the tickets sold
Also the winning numbers can be submitted to the blockchain even before the drawing takes place so people can verify they're not tampered but that needs a little more thinking perhaps a transaction with time bound options?

This is just an idea to explore, it may not work for you, just something to consider in order to gain more trust. I am working on a baseball betting site and will use something like this for better auditing, all tickets publicly available on the blockchain.

coinplaycenter

Torkus

You are right, but there are potential security risks. If addresses are exposed to public and have large amounts of XLM may this be a security flaw.

What about a draw that uses some public legit lottery numbers as a seed to coinplaycenter draw? is it legal for example to use numbers of powerball us for your own site draw?

coinplaycenter

Hi to everyone!

Our 16th Draw Lucky Numbers are 6,9,14,23,31 with 4831 participants and 147 winners!

Winning tables are here!

https://www.coinplaycenter.com/results

The next draw is At Wednesday, February 14, 2018, 8 PM UTC !

Jackpot is enabled because no winner with five matches found on this Draw. So for the next Draw#17 shared prize pool begins from 55956 XLM!

Each ticket costs 20 XLM and you can play as many tickets as you want.

Congratulations to Winners! Your winings are paid Directly in your Lumen Addresses with your MEMO (if you entered it in the form), or if no MEMO entered, with text coinplaycenterwinnings#16 .

Thank you all for your trust. We are only in the beginning!

Torkus

coinplaycenter

Not at all, you won't show the whole address only the first ten chars would be enough. The address is not the important part, the numbers are, so people know there are no "magic" winning tickets appearing after the draw.

Regarding real lotteries, just use them, it would be even more trustable to play your lotto than any government sponsored lottery. In other words, I rather play your lotto and win 100,00 XLM than any powerball and never win because they're all manipulated.

coinplaycenter

Hi all,

We reached 2477 participations in https://www.coinplaycenter.com and the shared Prize Pool is 103182 XLM for the next Draw (No 24)!

Only Few hours left!The ticket fee is ONLY 20 XLM. !

Double Jackpot is enabled because no winners found with 5 and 4 matched numbers in Draw No 23!

Yours sincerely

coinplaycenter

Hi to everyone!

Our 24th Draw Lucky Numbers are 2,16,18,20,27 with 4570 participants and 195 winners!

Winning tables are here!https://www.coinplaycenter.com/results

Daily Draws at 8 PM UTC ! Each ticket costs 20 XLM and you can play as many tickets as you want.

Congratulations to Winners! Your winings are paid Directly in your Lumen Addresses with your MEMO (if you entered it in the form), or if no MEMO entered, with text coinplaycenterwinnings#24 .

Thank you all for your trust! New Games coming soon!

Torkus

Look coinplaycenter, your app is interesting but you can't get this sub as a billboard for your advertisement, let players go to your site and that's it, you're not going to be announcing prizes here every week since this forum is not for that purpose. If you make updates and ask for feedback then it's all good.

Still, I am no mod and you can do whatever you want.

rob

Hey, curious how PRNG are generated. I have looked into building blockchain gambling games before and that is always one of the top concerns.

If you are curious, here is an interesting article on PRNG's and Ethereum: https://blog.positive.com/predicting-random-numbers-in-ethereum-smart-contracts-e5358c6b8620