For signing the data use the MD5 algorithm.
API uses two hash codes:
SID – Securty Identifier
UID – Unique Identifier (payment code retured by the API)
POS software generates the SID and API generates the UID.
SID
client_secret – variable from authentication
vat_number – Unique ID of the company
business_place – Short code of business place (given after registration)
business_device – serial number of POS device in a business place (given after registration)
bill_number – serial number of the receipt/bill
bill_datetime – date/time of the receipt/bill uses ISO 8601 format (WAT – West Africa Time)
total_value – total amount of the receipt/bill
Formula:
Signing the data
$buffer = $client_secret;
$buffer .= $vat_number;
$buffer .= $business_place;
$buffer .= $business_device;
$buffer .= $bill_number;
$buffer .= $bill_datetime;
$buffer .= $total_value;
$security_code = md5($buffer);
// npm package: https://www.npmjs.com/package/js-md5
var md5 = require('js-md5');
var buffer = client_secret;
buffer += vat_number;
buffer += business_place;
buffer += business_device;
buffer += bill_number;
buffer += bill_datetime;
buffer += total_value;
var security_code = md5(buffer);
