public TransactionPoolService(TransactionService transactionService, BlockchainContext dbContext)
 {
     _transactionService = transactionService;
     _dbContext          = dbContext;
 }
 public WalletService(TransactionService transactionService, BlockchainContext dbContext, TransactionPoolService transactionPool)
 {
     _transactionService = transactionService;
     _dbContext          = dbContext;
     _transactionPool    = transactionPool;
 }