&gt; SatoshiDice is a dapp that was built using bitcoin.<p>But SatoshiDice was not trustless; it was only provably-fair. By sending your dice bet to satoshidice, you were trusting them to actually pay you if you won instead of just keeping your money (though you didn&#x27;t have to trust that they were using a fair die).<p>An on-chain dice contract is completely different, because there&#x27;s no central operator that you have to trust to pay out the winnings.