curl --location 'https://base.merchantwarrior.com/npp//refund' \
--header 'MW-MERCHANTID: xxxxxx' \
--header 'MW-APIKEY: xxxxxx' \
--header 'MW-MESSAGEHASH: {{hmac}}' \
--header 'Content-Type: application/json' \
--data '{
"refundAmount": "10.00",
"description": "refund of order"
}'{
"responseCode": "0",
"responseMessage": "Operation successful",
"transactionID": "1500-41db83ef-0f08-11ed-93d3-005056b209e0"
}