Confirmation of a prepaid order (Node.js)
In this use case, the user usually clicks on confirm and is taken to a payment page. There he makes the payment and upon a successful transaction, the user gets redirected to the application where the order gets placed. Usually a moment later, the order gets confirmed by the pharmacy with the latest status update on the fulfillment of the order.
Code snippets
BPP receives protocol confirm
/*
Example Request JSON:
{
"context": {
"domain": "nic2004:52311",
"country": "IND",
"city": "std:080",
"action": "confirm",
"core_version": "0.9.2",
"bap_id": "https://mock_bap.com/",
"bap_uri": "https://mock_bap.com/beckn/",
"transaction_id": "1239890342",
"message_id": "123793824",
"timestamp": "2021-03-23T10:00:40.065Z"
},
"message": {
"order": {
"items": [
{
"id": "vit_c",
"price" : {
"currency": "INR",
"value": "500"
},
"quantity": {
"selected": {
"count": 1
}
}
},
{
"id": "a_500",
"price" : {
"currency": "INR",
"value": "500"
},
"quantity": {
"selected": {
"count": 1
}
}
}
],
"billing": {
"name": "John Doe",
"address": {
"door": "21A",
"name": "ABC Apartments",
"locality": "HSR Layout",
"city": "Bengaluru",
"state": "Karnataka",
"country": "India",
"area_code": "560102"
},
"email": "[email protected]",
"phone": "+919876543210"
},
"fulfillment": {
"type": "HOME-DELIVERY",
"start": {
"location": {
"id": "abc_medicines_koramangala",
"descriptor": {
"name": "ABC Medicines"
},
"gps": "12.9349377,77.6055586"
},
"contact": {
"phone": "+919999999999",
"email": "[email protected]"
}
},
"end": {
"location": {
"gps": "12.914028, 77.638698",
"address": {
"door": "21A",
"name": "ABC Apartments",
"locality": "HSR Layout",
"city": "Bengaluru",
"state": "Karnataka",
"country": "India",
"area_code": "560102"
}
},
"time": {
"range": {
"start": "2021-06-15T07:11:36.212Z",
"end": "2021-06-15T07:12:36.212Z"
}
},
"instructions": {
"name": "drop off instructions",
"short_desc": "Leave at door step"
},
"contact": {
"phone": "+919876543210",
"email": "[email protected]"
}
},
"customer": {
"person":{
"name": "John Doe",
"image": "https://mock_bap.com/prescription1.jpg",
"dob": "1991-08-12"
}
}
},
"quote": {
"price": {
"currency": "INR",
"value": "1100"
},
"breakup": [
{
"title": "Vitamin C",
"price": {
"currency": "INR",
"value": "500"
}
},
{
"title": "Antibiotics",
"price": {
"currency": "INR",
"value": "500"
}
},
{
"title": "Delivery Charge",
"price": {
"currency": "INR",
"value": "100"
}
}
],
"ttl": "P1H"
},
"payment": {
"uri": "https://api.bpp.com/pay?amt=$amount&txn_id=ksh87yriuro34iyr3p4&mode=upi&vpa=bpp@upi",
"tl_method": "http/get",
"params": {
"transaction_id": "ksh87yriuro34iyr3p4",
"amount": "1100",
"mode": "upi",
"vpa": "bpp@upi"
},
"type": "ON-ORDER",
"status": "PAID"
}
}
}
}
*/
// Auth middleware authenticates the digital signature of the incoming request
router.post('/healthcare_pharmacy/confirm', auth, confirm);
function confirm({ body }, res) {
try {
const message = _.get(body, "message");
const context = _.get(body, "context");
if (!context) {
return res.status(400).send(httpResponse("NACK", "Missing Context"));
}
if (!message) {
return res.status(400).send(httpResponse("NACK", "Missing Message"));
}
// ... Returns the ack immediately and continue the processing after validation
res.status(200).send(httpResponse("ACK"));
processConfirm(headers, body)
} catch (error) {
res.status(500).send(httpResponse("NACK", error));
}
};BPP processes the confirm
function processConfirm(requestHeaders, confirmRequestBody) {
// Execute business logic here
let confirmResponse = {}
generateResponse(requestHeaders, confirmResponse)
}BPP generates response
async function generateResponse(requestHeaders, rawResponse) {
/*
Example Request JSON :
{
"context": {
"domain": "nic2004:52311",
"country": "IND",
"city": "std:080",
"action": "on_confirm",
"core_version": "0.9.2",
"bap_id": "https://mock_bap.com/",
"bap_uri": "https://mock_bap.com/beckn/",
"transaction_id": "1239890342",
"message_id": "123793824",
"timestamp": "2021-03-23T10:00:40.065Z"
},
"message": {
"order": {
"id": "order_1",
"state": "Active",
"items": [
{
"id": "vit_c",
"price" : {
"currency": "INR",
"value": "500"
},
"quantity": {
"selected": {
"count": 1
}
}
},
{
"id": "a_500",
"price" : {
"currency": "INR",
"value": "500"
},
"quantity": {
"selected": {
"count": 1
}
}
}
],
"billing": {
"name": "John Doe",
"address": {
"door": "21A",
"name": "ABC Apartments",
"locality": "HSR Layout",
"city": "Bengaluru",
"state": "Karnataka",
"country": "India",
"area_code": "560102"
},
"email": "[email protected]",
"phone": "+919876543210"
},
"fulfillment": {
"type": "HOME-DELIVERY",
"start": {
"location": {
"id": "abc_medicines_koramangala",
"descriptor": {
"name": "ABC Medicines"
},
"gps": "12.9349377,77.6055586"
},
"contact": {
"phone": "+919999999999",
"email": "[email protected]"
}
},
"end": {
"location": {
"gps": "12.914028, 77.638698",
"address": {
"door": "21A",
"name": "ABC Apartments",
"locality": "HSR Layout",
"city": "Bengaluru",
"state": "Karnataka",
"country": "India",
"area_code": "560102"
}
},
"time": {
"range": {
"start": "2021-06-15T07:11:36.212Z",
"end": "2021-06-15T07:12:36.212Z"
}
},
"instructions": {
"name": "drop off instructions",
"short_desc": "Leave at door step"
},
"contact": {
"phone": "+919876543210",
"email": "[email protected]"
}
},
"customer": {
"person":{
"name": "John Doe",
"image": "https://mock_bap.com/prescription1.jpg",
"dob": "1991-08-12"
}
}
},
"quote": {
"price": {
"currency": "INR",
"value": "1100"
},
"breakup": [
{
"title": "Vitamin C",
"price": {
"currency": "INR",
"value": "500"
}
},
{
"title": "Antibiotics",
"price": {
"currency": "INR",
"value": "500"
}
},
{
"title": "Delivery Charge",
"price": {
"currency": "INR",
"value": "100"
}
}
],
"ttl": "P1H"
},
"payment": {
"uri": "https://api.bpp.com/pay?amt=$amount&txn_id=ksh87yriuro34iyr3p4&mode=upi&vpa=bpp@upi",
"tl_method": "http/get",
"params": {
"transaction_id": "ksh87yriuro34iyr3p4",
"amount": "1100",
"mode": "upi",
"vpa": "bpp@upi"
},
"type": "ON-ORDER",
"status": "PAID"
}
}
}
}
*/
let onConfirmResponseBody = { }
//call protocol on_confirm
await callOnConfirm(requestHeaders, onConfirmResponseBody);
}BPP calls protocol on_confirm
async function callOnConfirm(requestHeaders, onConfirmResponseBody) {
// Take the subscriber Id from the header and calls the registry to get the url. If already cached it need not to call again
const uri = await lookup(requestHeaders);
// Construct Header
const headers = constructAuthHeader(); // Auth Header with digital Signature
return axios({ url: `${uri}/healthcare_pharmacy/on_confirm`, method: "POST", data: onConfirmResponseBody });
}