$1 per Hashkey
1 Hashkey per spin
How it works:
Before each spin, the server generates a seed and shows only its SHA-256 hash.
After the spin, the raw server seed is revealed. You can hash it yourself to verify
it matches the pre-committed hash. The outcome is calculated server-side as
HMAC-SHA256(serverSeed, clientSeed:nonce),
ensuring no manipulation is possible.