/**
  * Process incomming request.
  */
 public function process($payload)
 {
     if ($payload["type"] != "address") {
         return;
     }
     $data = $payload["data"];
     if (!$data["txid"]) {
         throw new Exception("No transaction id");
     }
     if (!$data["address"]) {
         throw new Exception("No address");
     }
     if (!$data["balance_change"]) {
         throw new Exception("No amount data");
     }
     $transaction = Transaction::findOneBy("transactionHash", $data["txid"]);
     if (!$transaction) {
         $account = Account::findOneBy("depositAddress", $data["address"]);
         if (!$account) {
             throw new Exception("No matching account.");
         }
         $transaction = new Transaction();
         $transaction->notice = "Deposit";
         $transaction->transactionHash = $data["txid"];
         $transaction->toAccountId = $account->id;
         $transaction->state = Transaction::CONFIRMING;
         $transaction->amount = BitcoinUtil::toSatoshi("btc", $data["balance_change"]);
         $transaction->save();
         $account->getPubSub()->publish();
     }
     if ($transaction->getState() == Transaction::COMPLETE) {
         return;
     }
     $transaction->confirmations = intval($data["confirmations"]);
     $account = $transaction->getToAccount();
     if (!$account) {
         throw new Exception("unable to find account");
     }
     if ($transaction->confirmations >= get_option("blockchainaccounts_notifications")) {
         $account->balance += $transaction->amount;
         $account->save();
         $transaction->toAccountBalance = $account->balance;
         $transaction->timestamp = time();
         $transaction->state = Transaction::COMPLETE;
         $transaction->save();
     }
     $transaction->save();
     $account->getPubSub()->publish();
 }
    $account = Account::findOneBy("depositAddress", $_REQUEST["input_address"]);
    if (!$account) {
        exit("no associated account or transaction");
    }
    $transaction = new Transaction();
    $transaction->notice = "Deposit";
    $transaction->transactionHash = $_REQUEST["transaction_hash"];
    $transaction->toAccountId = $account->id;
    $transaction->state = Transaction::CONFIRMING;
    $transaction->amount = $_REQUEST["value"];
    $transaction->save();
}
if ($transaction->state == Transaction::COMPLETE) {
    exit("*ok*");
}
$transaction->confirmations = $_REQUEST["confirmations"];
if ($transaction->confirmations >= get_option("blockchainaccounts_notifications")) {
    $account = Account::findOneBy("id", $transaction->toAccountId);
    if (!$account) {
        exit("unable to find account");
    }
    $account->balance += $transaction->amount;
    $account->save();
    $transaction->toAccountBalance = $account->balance;
    $transaction->timestamp = time();
    $transaction->state = Transaction::COMPLETE;
    $transaction->save();
    exit("*ok*");
}
$transaction->save();
echo "processing...";