Receiving request to add an item to an active order and sending the updated order with payment terms (Node.js)
In this use case, the user adds one or more items after the order has been confirmed. If the user has already made the payment, the seller sends additional payment terms that the user needs to fulfill before the item(s) get added. In case the order is postpaid, the seller can update the total amount to be paid after the fulfillment of the order.
Code snippets
BPP receives protocol update
/*
Example Request JSON:
{
"context": {
"domain": "local_retail",
"country": "IND",
"city": "std:080",
"action": "update",
"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": "2021-06-23T07:33:02.655Z"
},
"message": {
"update_target": "items",
"order": {
"id":"298310283",
"state":"Order placed",
"provider": {
"id": "pooja-stores",
"locations": [
{
"id": "pooja-stores.koramangala"
}
]
},
"items": [
{
"id": "item_1",
"quantity": {
"count": 2
}
},
{
"id": "item_4",
"quantity": {
"count": 2
}
},
{
"id": "item_5",
"quantity": {
"count": 1
}
}
],
"billing": {
"name": "Jane Doe",
"address": {
"door": "21B",
"name": "EFG Apartments",
"locality": "Electronic City",
"city": "Bengaluru",
"state": "Karnataka",
"country": "India",
"area_code": "560104"
},
"email": "[email protected]",
"phone": "+919777543210",
"created_at": "2021-06-15T07:08:36.211Z",
"updated_at": "2021-06-15T07:08:36.211Z"
},
"fulfillment": {
"type": "home-delivery",
"tracking": false,
"start": {
"location": {
"id": "pooja-stores.koramangala",
"descriptor": {
"name": "Pooja Stores"
},
"gps": "12.9349377,77.6055586"
},
"time": {
"range": {
"start": "2021-06-15T07:09:30.000Z",
"end": "2021-06-15T07:10:30.000Z"
}
},
"instructions": {
"name": "pick up instructions",
"short_desc": "Provide the order id"
},
"contact": {
"phone": "+919999999999",
"email": "[email protected]"
}
},
"end": {
"location": {
"gps": "12.835407, 77.662524",
"address": {
"door": "21B",
"name": "EFG Apartments",
"locality": "Electronic City",
"city": "Bengaluru",
"state": "Karnataka",
"country": "India",
"area_code": "560104"
}
},
"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": "+919777543210",
"email": "[email protected]"
}
}
},
"quote": {
"price": {
"currency": "INR",
"value": "300"
},
"breakup": [
{
"title": "Brown Bread 400 gm",
"price": {
"currency": "INR",
"value": "80"
}
},
{
"title": "Good Life Toned Milk 1L",
"price": {
"currency": "INR",
"value": "120"
}
},
{
"title": "Unsalted butter",
"price": {
"currency": "INR",
"value": "100"
}
}
],
"ttl": "P4D"
},
"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": "200",
"mode": "upi",
"vpa": "bpp@upi"
},
"type": "ON-ORDER",
"status": "PAID"
},
"created_at": "2021-06-23T07:33:02.655Z",
"updated_at": "2021-06-23T07:33:02.655Z"
}
}
}
*/
// Auth middleware authenticates the digital signature of the incoming request
router.post('/local_retail/update', auth, update);
function update({ headers, 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"));
processUpdate(headers, body)
} catch (error) {
res.status(500).send(httpResponse("NACK", error));
}
};BPP processes the status
function processUpdate(requestHeaders, updateRequestBody) {
// Execute business logic here
let updateResponse = {}
generateResponse(requestHeaders, updateResponse)
}BPP generates response
async function generateResponse(){
/*
Example Request JSON :
{
"context": {
"domain": "local_retail",
"country": "IND",
"city": "std:080",
"action": "on_update",
"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": "2021-06-23T07:33:02.655Z"
},
"message": {
"order": {
"id":"298310283",
"state":"Order placed",
"provider": {
"id": "pooja-stores",
"locations": [
{
"id": "pooja-stores.koramangala"
}
]
},
"items": [
{
"id": "item_1",
"quantity": {
"count": 1
}
},
{
"id": "item_4",
"quantity": {
"count": 2
}
},
{
"id": "item_5",
"quantity": {
"count": 1
}
}
],
"billing": {
"name": "Jane Doe",
"address": {
"door": "21B",
"name": "EFG Apartments",
"locality": "Electronic City",
"city": "Bengaluru",
"state": "Karnataka",
"country": "India",
"area_code": "560104"
},
"email": "[email protected]",
"phone": "+919777543210",
"created_at": "2021-06-15T07:08:36.211Z",
"updated_at": "2021-06-15T07:08:36.211Z"
},
"fulfillment": {
"type": "home-delivery",
"tracking": false,
"start": {
"location": {
"id": "pooja-stores.koramangala",
"descriptor": {
"name": "Pooja Stores"
},
"gps": "12.9349377,77.6055586"
},
"time": {
"range": {
"start": "2021-06-15T07:09:30.000Z",
"end": "2021-06-15T07:10:30.000Z"
}
},
"instructions": {
"name": "pick up instructions",
"short_desc": "Provide the order id"
},
"contact": {
"phone": "+919999999999",
"email": "[email protected]"
}
},
"end": {
"location": {
"gps": "12.835407, 77.662524",
"address": {
"door": "21B",
"name": "EFG Apartments",
"locality": "Electronic City",
"city": "Bengaluru",
"state": "Karnataka",
"country": "India",
"area_code": "560104"
}
},
"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": "+919777543210",
"email": "[email protected]"
}
}
},
"quote": {
"price": {
"currency": "INR",
"value": "180"
},
"breakup": [
{
"title": "Brown Bread 400 gm",
"price": {
"currency": "INR",
"value": "40"
}
},
{
"title": "Good Life Toned Milk 1L",
"price": {
"currency": "INR",
"value": "120"
}
},
{
"title": "Unsalted butter",
"price": {
"currency": "INR",
"value": "100"
}
}
],
"ttl": "P4D"
},
"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": "100",
"mode": "upi",
"vpa": "bpp@upi"
},
"type": "ON-ORDER",
"status": "NOT-PAID"
},
"created_at": "2021-06-23T07:33:02.655Z",
"updated_at": "2021-06-23T07:33:02.655Z"
}
}
}
*/
//The below code generates the above example JSON.
let onUpdateResponseBody = {}
//call protocol on_update
await callOnUpdate(requestHeaders, onUpdateResponseBody);
}BPP calls protocol on_update
async function callOnUpdate(requestHeaders, onUpdateResponseBody) {
// 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}/local_retail/on_track`, method: "POST", headers, data: onUpdateResponseBody })
}
