Block Roulette - Bet on what the next block hash will be

Mar 16, 2016
12
4
woodcoin.org
Presenting:

比特币 区块 轮盘赌


http://block-roulette.bit

http://block-roulette.com

http://blockzz.com

This thing is basically self explanatory. Your bet, sent to a static address, is on the table when it is confirmed in a block. The ball rolls around on the table - where the ball lies is determined by the last 5 digits of the next block hash. We pay you accordingly (minus .0003 miners fee).

Please do check "table status" to see how much cash is on the table to ensure you don't bet too much, and whether the croupier is up to date on the current block height.

There are three croupiers manning the table to ensure you can play 24 hours a day.

Background

This thing exists mostly due to problems with the first generation of provably fair games:

1) It's not easy to verify the declared fairness.

Checking usually requires downloading a hash of a server seed before playing, downloading the seed itself after playing, checking the hash, checking a whole series of bets, and possibly other steps. How many players really do this?

2) It's sometimes still vulnerable

There have been strategies the site operator could use to cheat you. One thing they could do is search through still-possibly-verifiable seeds (seeds which would have generated existing previous history) and find one which will make your bet still lose. Another is to use house bets to change the order of your bet. If the order matters, you can be cheated.

As you can tell, we got rid of these problems here with block-roulette. All entropy comes from an ideal stochastic source: the hash of the next bitcoin block. The down side of this is waiting for the block. This isn't instant payout anymore.



Disclosure

In fact, even though block-roulette is a big improvement, we still aren't provably fair (it's unclear such a thing really exists). There is a strategy we could use to cheat you. Namely, after you place a bet - we see the bet and somehow (possibly through miner collusion) put a bunch of other bets in front of yours in the block. Then when it comes time to pay out your bet, the table will be empty of cash.

If we ever did this, it would have a very distinct signature. It wouldn't be worth our while as the game would die. You can further avoid this by keeping bets relatively small (in potential payout) compared to the available cash on the table.

Enjoy!
 

Chronos

Member
Mar 6, 2016
56
44
www.youtube.com
How long has this been in operation?

The website could be made more interesting by showing all the bets in each block, after winners are paid out.
 
Mar 16, 2016
12
4
woodcoin.org
Thanks for your reply:) This has been up for about two months now, but only starting to share because we wanted to make sure the kinks were out. Yeah we could make that information more readily available, good suggestion, however it's already there on block explorers. Also I am less than enthused by sites showing this kind of "volume" because in the end - you don't know if they are house bets or real bets from the public.
 

Chronos

Member
Mar 6, 2016
56
44
www.youtube.com
Provably fair, but not provably not an exit scam. It would be neat to somehow have the payee address automatically execute a script based on the outcome of the next hash, so that the operator has no ability to steal the funds currently in circulation.