MD5 checksum for validation
Test mode flag ("0" for production, "1" for test)
Transaction amount (as string)
Transaction CRC (client reference)
Transaction date (YYYY-MM-DD HH:MM:SS format)
Transaction description
Payer email address
Transaction error message ("none" if no error)
Transaction identifier
Transaction paid amount (as string)
Transaction status ("TRUE" for success)
Transaction ID