Hey @monisharpa2020
The easiest way is to create a new REFramework-based project and simply copy the missing file back into your current project folder. Once you have the file in place, you need to make sure it includes the correct arguments, such as in_TransactionNumber, in_TransactionData, out_TransactionItem etc. matching how they are used in the rest of the framework.
If your project is under version control (like GIT) you can restore the GetTransactionData.xaml file from the repository history.