Every spin's outcome is derived from the SlotHashes sysvar — the X1 chain's own record of recent block hashes. Nobody (not you, not the house) can predict or grind it. The full paytable lives in the contract's payout_multiplier function. Any past spin can be re-checked: take the slot hash, mix it with your wallet + the spin nonce + your bet exactly as the program does, and you get the same reels.