function rollPlaceBet(
    RollGameLib.Type t, 
    uint16 mask, 
    uint8 rollUnder, 
    address referrer,
    uint sigExpirationBlock, 
    bytes32 hostSeedHash, 
    uint8 v, 
    bytes32 r, 
    bytes32 s
  ) 
    external payable
  {
    roll.placeBet(t, mask, rollUnder, referrer, sigExpirationBlock, hostSeedHash, v, r, s);
  }