Check Transaction Status

Check Transaction Status Instructions

Overview

After a transaction is submitted to the blockchain (see Send EGLD Transaction), it takes some time for a validator to process it. An app needs to check if that transaction was successfully processed or not before continuing execution. This section shows how to check the status of a submitted transaction.

Parameter Setup

To check the status of a transaction this API method will be used:

/// <summary>
/// Check the status of a specific transaction 
/// </summary>
/// <param name="txHash">The hash of the transaction obtained after signing</param>
/// <param name="transactionProcessed">Callback to track the result</param>
/// <param name="delay">Time to wait before querying the tx status. A tx takes some time to process so some delays are good to limit the usage of APIs</param>
public static void CheckTransactionStatus(string txHash, UnityAction<OperationStatus, string> transactionProcessed, float delay)

A usage example:

//after a transaction is successfully signed, this callback is triggered[see Send EGLD Transaction example]
private void SigningStatusListener(MultiversXUnityTools.OperationStatus operationStatus, string message)
{
    if (operationStatus == MultiversXUnityTools.OperationStatus.Complete)
    {
        txHash = message;
        //txHash - transaction hash
        //BlockchainTransactionListener - callback
        //6 - time to wait before checking the transaction status(6s is the MultiversX block time, it takes at least a block to process a transaction) 
        MultiversXUnityTools.Manager.CheckTransactionStatus(txHash, TransactionProcessed, 6);
    }
}

/// <summary>
/// Listener for the transaction status response 
/// </summary>
/// <param name="operationStatus">Completed, In progress or Error</param>
/// <param name="message">additional message</param>
private void TransactionProcessed(MultiversXUnityTools.OperationStatus operationStatus, string message)
{
     if (operationStatus == OperationStatus.Complete)
     {
           //after a transaction is processed, refresh account balance
           MultiversXUnityTools.Manager.RefreshAccount(RefreshDone);
     }
     else
     {
          //process failed transactions
     }
}

This concludes the Check Transaction Status Unity tutorial.

Recommended next: Send ESDT Transaction