String hash = Hex.toHexString(transaction.getHash());
logger.info("pending transaction placed hash: {}", hash );
WalletTransaction walletTransaction = this.walletTransactions.get(hash);
if (walletTransaction != null)
walletTransaction.incApproved();
else {
walletTransaction = new WalletTransaction(transaction);
this.walletTransactions.put(hash, walletTransaction);
}