/**
  * @param string $walletId
  * @return WalletDto|null
  */
 public function getWallet($walletId)
 {
     $wallet = $this->walletService->getWallet(new WalletId($walletId));
     $blockCypherAddress = null;
     $blockCypherAddress = $this->blockCypherAddressService->getAddress($wallet->getId()->getValue(), $wallet->getCoinSymbol(), $wallet->getToken());
     if ($blockCypherAddress === null) {
         return null;
     }
     return WalletDto::from($wallet, $blockCypherAddress);
 }