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// An inventory slot
message Slot {
  // ID of the merchant for the slot (required for CreateBooking)
  string merchant_id = 1;

  // ID of the merchant Service (required for CreateBooking)
  string service_id = 2;

  // Start time of the appointment slot in seconds of UTC time since Unix epoch.
  // (required for CreateBooking)
  int64 start_sec = 3;

  // Duration of the appointment slot (required for CreateBooking)
  int64 duration_sec = 4;

  // Opaque tag that identifies the availability slot and matches the value
  // provided in the availability feed (optional)
  string availability_tag = 5;

  // The set of resources that disambiguates the appointment slot, e.g. by
  // indicating the staff member and room selected by the user (optional)
  ResourceIds resources = 6;

  // Indicates whether bookings of this slot will be confirmed
  // synchronously or asynchronously. (optional)
  // An UNSPECIFIED value will be interpreted as synchronous.
  ConfirmationMode confirmation_mode = 7;
}

// Resource specification that disambiguates an appointment slot
message ResourceIds {
  // The staff ID as provided in the feed or empty if not applicable or no staff
  // was selected. (optional)
  string staff_id = 1;

  // The room ID as provided in the feed or empty if not applicable or no room
  // was selected. (optional)
  string room_id = 2;

  // For Dining Reservations only: the number of seats requested in the booking.
  // (optional)
  int32 party_size = 3;
}