CURRENT BITCOIN BLOCK: 601845
BITCOIN BLOCK FOR CLIENT SEED: 601857
Any clue why 601846 to 601856 were not chosen but 601857? I may answer: they were used but winner is not the house owned ID until 601857. Someone if you know how is the calculation, please check if 601846 to 601856 yield any winner please.
The most questionable things that look suspicious is the ticket list & block id used for the draw were published at the same time with winner ID announcement. At least they could post the list first and announce the block ID which is 1 or 2 days ahead before the drawing taking place. It's fair if this block number was published before the announcement of drawing and then the winner, but in this case it's not and it's big question lol. Any way, you should do that way next draw.
It's an integral part of what makes it provably fair. We put a tweet out in advance with a link to the ticket file that tells you which block in the future will be used for the server seed. You can then download that file BEFORE the draw happens so you can prove we didn't do what you just said.
Of course, it had a super high affect but for some reason you guys decline to do the math, the way it could be calculated has been explained a million times already
Because I'm still waiting for an answer to this question and the million explanations of other ways are all wrong.
OK. You tell me the formula I should use to determine how much of the 150 BTC wagered yesterday would not have been wagered if we weren't giving away a Lambo and I'll tell you how well the promo is doing.
You may be correct they should publish all data they used for drawing
The Village Idiot is never correct. We did publish everything you need to work out the winner yourself.
https://twitter.com/freebitco/status/1190070026612531202PROVABLY FAIR LOTTERY
SERVER SEED HASH FOR CURRENT ROUND
614b31c108dd30c335983826c64ea9a2bf258fc814d77c5a75d5e328bb1f12db
This lottery is provably fair. What that means is that there is no way the site can cheat you by picking a lottery winner who we favour. All winners are picked randomly and the method for picking the winners is described below.
At the beginning of each round, we generate a server seed for that round and show you the SHA256 hash of this seed.
When a lottery round has concluded, we make a list of all user id's and their lottery tickets and sort it in ascending order of the user id's.
We then use this list to assign ticket numbers for all tickets. For example if user id 1 has 10 tickets and user id 2 has 20 tickets, then user id 1 will have ticket numbers 0 to 9 and user id 2 will have ticket numbers from 10 to 29. This is done for all users.
Then the list containing the user id's, tickets held by each user and their ticket numbers is published in a text file. This file also contains the total number of tickets issued in the round and the server seed for that round.
A MD5 hash of this text file is calculated.
Then the current bitcoin block number is recorded and a block number that is 12 blocks into the future is decided on. The block hash of this future block is used as a "client seed" ie. a seed that we are not aware of when the list in step 4 has been published.
Then a tweet is made via our twitter account (
https://twitter.com/freebitco) containing the link to the file generated in step 4, the MD5 hash of the file and the future bitcoin block number as determined in step 6. Since tweets cannot be edited, only deleted, this will provide a timestamp for when the list in step 4 was made, which can be compared to check that the bitcoin block determined in step 6 is in the future ie. we do not know the block hash of this block when the list is generated.
The winning ticket numbers will be calculated as described below:
A string (STRING1) is created - "[SERVER SEED]:[BLOCK HASH]:[WINNING POSITION]".
The SHA256 hash of STRING1 is calculated and the first 8 characters of this hash are taken (STRING2).
STRING2 is converted to a decimal which gives us a number between 0 and 4,294,967,295 (NUM1).
NUM1 is then multiplied by the (total number of tickets minus 1) and divided by 4,294,967,295 to get a number (NUM2) between 0 and the total number of tickets less 1.
NUM2 is then rounded off to the nearest whole number which is the winning ticket number.
HOW IS THE SYSTEM FAIR?
The system described above that is used for picking the winners is provably fair because it has multiple safeguards in place to ensure that winners are picked randomly and fairly.
We provide a SHA256 hash of the server seed when a lottery round starts. If we change the server seed at any time, the SHA256 hash of the new seed will not match the hash we provided earlier. After a round has ended and we provide the server seed that will be used to pick winners, the hash of the seed we provide can be checked against the hash we provided originally and both should match.
We use a future bitcoin block hash as the "client seed" ie. a seed that we do not know of. All bitcoin block hashes are unique and nobody knows what the block hash of a future block will be until the block has been mined.
We use twitter to publish the future bitcoin block number, the list of users and their ticket numbers and the MD5 hash of the user list. It provides a timestamp to check if the block hash that we use is indeed in the future. Since tweets cannot be edited, only deleted - if we delete the tweet after the future block has been mined and publish a new one, it would be easy to catch us cheating by comparing the timestamp of the tweet and that of the bitcoin block. The timestamp of the tweet should always be lesser than the time timestamp of the bitcoin block whose hash is used as the client seed.
We provide a MD5 hash of the text file containing the list of users and their ticket numbers. If even a single character in the text file is changed after the MD5 hash in the tweet is published, the MD5 hash of the edited file will not match the MD5 hash provided in the tweet.