@Override
 public String sendBitcoins(
     String walletPublicKey, UUID FermatTrId, CryptoAddress addressTo, long satoshis)
     throws InsufficientCryptoFundsException, InvalidSendToAddressException,
         CouldNotSendMoneyException, CryptoTransactionAlreadySentException {
   return bitcoinCurrencyCryptoVaultManager.sendBitcoins(
       walletPublicKey, FermatTrId, addressTo, satoshis, null);
 }