Blast relaunch

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  • Isildur

    IsildurX

BLAST

10 October 2020

BLAST V2

The previous hashes has recently ran out, and as promised, the server seed for the the previous seeding event is:

f60ec49a5e50e71df0e57ced59fa90db23b8afd9d5f97dee5e87e0449c5e9cd8b0b6991adbb0db955503d978ee9f669c917ad568f88a0f98bdb06a2e346f5ab7

To keep this game provably fair, we'll announce our methods here again.
We will generate a new batch of 1 Million SHA512 chained hashes (starting with a new server secret)

The final hash is:

6792dbfbe918c3533c87ae70d63c03dc287e8ad201733768dacada095d52eb09539cde581c1016e83b1385c675dd7f17e5a9de0a3ba2af8329a0cf39e89c25ba

Bitsler will go through the hashes (in reverse order) and use each hash to determine the crash result. So the hash of our first game's hash is the same as our published final hash.

To ensure we didn't pick a hash chain that has some advantage for us, we will use a future bitcoin block hash as "client seed" to generate the final crash results. We will use the block hash of bitcoin block 651400.

The code to generate each crash result is:

$hash  =  hash_hmac('sha512',  $gameHash,  $blockHash);
$number  =  hexdec(substr($hash,  0,  13));
$multiplier  =  98  /  (1  -  ($number  /  (pow(2,52))));
echo  max(100,  floor($multiplier))  /  100;

This blog post will be shared on our social media channels and archived by several archive websites. Therefor we cannot edit the final hash (and therefor hash chain) nor the future bitcoin block number anymore. This makes our new game Blast completely provably fair.

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