custome payfast checkout gateway code example

Example: payfast documentation

const ITN_Payload = {
 'm_payment_id': 'SuperUnique1',
 'pf_payment_id': '1089250',
 'payment_status': 'COMPLETE',
 'item_name': 'test+product',
 'item_description': 'test+description' ,
 'amount_gross': 200.00,
 'amount_fee': -4.60,
 'amount_net': 195.40,
 'custom_str1': '',
 'custom_str2': '',
 'custom_str3': '',
 'custom_str4': '',
 'custom_str5': '',
 'custom_int1': '',
 'custom_int2': '',
 'custom_int3': '',
 'custom_int4': '',
 'custom_int5': '',
 'name_first': '',
 'name_last': '',
 'email_address': '',
 'merchant_id': '10000100',
 'signature': 'ad8e7685c9522c24365d7ccea8cb3db7'
};