contract paysafe {
    address buyer;
    address seller;

    function initalize() { /* start the contract - buyer and seller are uniquily identified */ }
    function lockMoney() { /* lock money in the contract - cannot be refunded by the buyer himself */ }
    function confirmDelivery() { /* confirm delivery, money is transfered to seller. Only buyser can call this. */ }
    function confirmCancellation() { /* confirm cancellation, money is transfered back to buyer. Only seller can call this. */ }
}