Hi kotwica666.
Im moderator at luckybit, and im 100% sure LuckyBit is a provably fair game. In the page you can see it in "Menu > Provably Fair". There you will find this:
Lucky Bit is provably fair!
This is how it works:
The key that LuckyBit uses to determine the "lucky moves" of a bet, and thus the winning amount, is changed every day;
The key of a given day is made public after midnight of the next day;
The respective hashes of all keys, past and future, have been published and prove that LuckyBit uses the correct key for each day;
Nobody can modify this file, as its hash is recorded in the blockchain as of 10th of September, 2013;
You can verify each bet in the bet browser, which is also accessible at the bottom of the main page.
Need more technical details?Your lucky moves are determined using a hash of the following string:
<tx_id>:<vout_id>:<secret_key>, where:
<tx_id> is the transaction id of your bet as assigned by your wallet. (This data is controlled by you.)
<vout_id> is the rank of the output of your bet within the transaction's list of outputs. (Rank starts at 0 and is controlled by you.) This produces different lucky moves for each bet if you play several bets within a single transaction.
<secret_key> is the secret key of the day. It is unknown to you at the time of playing, but the hashes of all keys have been are published in advance, so nobody can modify these keys. The day of your bet is determined by the moment LuckyBit receives your bet's transaction. (Typically 1 to 10 seconds after you sent it.)
From the hash of <tx_id>:<vout_id>:<secret_key>, LuckyBit takes the binary representation of the last 4 bytes and read it from the left side. The bits determine your lucky moves: A 1 translates to a right move, a 0 to a left move. For instance, if the hexadecimal hash ends with ffff, your coin would always go right as the binary string would contain sixteen 1 and no 0
You can easily verify that your lucky moves were correct by computing the hash of the string <tx_id>:<vout_id>:<secret_key> of your bet. There are many websites that allow you to do this, for example:
http://www.convertstring.com/en/Hash/SHA256http://www.xorbin.com/tools/sha256-hash-calculatorThe key of each day is made public after midnight (UTC). LuckyBit can prove that nobody changed this key afterwards because the hashes of all keys, past and future, have been published in this file:
http://luckyb.it/secret-key-hashes.txtThe file that contains all key hashes has itself the following hash:
e45fb03ae911b267615bc923803bc553adb0e3dd6c9e47c939073f30ec912a63
You can compute the hash of this file as follows (on Linux/Mac):
curl -s
http://luckyb.it/secret-key-hashes.txt | shasum -a 256 -t
Using the hash of this file as a bitcoin private key, it produces the following bitcoin address: 1L85BxKU6J169kM934PQyV52maHmE86cFc. We have sent a transaction to this address on the 10/09/2013 (included in block 257126). You can verify this on blockchain.info
Note: All hashes are SHA-256 (text mode).
It is our primary concern to be helpful and responsive, please contact us at
support@luckyb.it if you have any remark or question.
If you want, please post the tx id of your bets and i will prove the site was not cheating, it was your bad luck.
I recomend you to give a second chance to Luckyb.it maybe next time you will have better luck.
Have a great day.
