How do I compute sha512 key for a new payment acquirer using the following parameters: signaturekey ; MerchantID ; u_reference ; u_amount ; u_currency. Output example should be something like this(Combined String):
ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789;M19-U-959;UPO-12345;10000;USD
Note: The combined string should be in UPPERCASE before the SHA512 hash computation like the example above.