Updating billing details of an active order (Node.js)

In this use case, the user requests the delivery agency to change the billing details of an active order and receives the order with updated billing details.

Update

Code snippets

Client calls the BAP server to trigger Update:

    router.post("/delivery/update_billing_detail", updateOrder);

    async function updateOrder({ body }, res) {
        try {
            //  .. Validate the client request before below function
            await generateUpdateOrderRequest(body)
        } catch (error) {
            res.status(500).send(httpResponse("NACK", error));
        }
    };

BAP server generates the protocol request body

    // Code to generate the protocol request body i.e. function generateUpdateOrderRequest() specified above

    async function generateUpdateOrderRequest(clientRequestBody) {
/*
Example Request JSON :
{
    "context": {
        "domain": "delivery",
        "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": "billing",
        "order": {
            "id": "order_1",
            "state": "Active",
            "items": [
                {
                    "id": "standard",
                    "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": {
                        "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": "Don't ring doorbell"
                    },
                    "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": "40"
                },
                "breakup": [
                    {
                        "title": "Standard delivery",
                        "price": {
                            "currency": "INR",
                            "value": "40"
                        }
                    }
                ],
                "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": "40",
                    "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"
        }
    }
}
*/
        //The below code generates the above example JSON.
        const transactionId = _.get(clientRequestBody, "transactionId");
        // Returns the Context including MessageId
        const orderId = _.get(clientRequestBody, orderId);
        const userBillingDetails = _.get(clientRequestBody, "userBillingDetails");
        const locationDetails = _.get(clientRequestBody, "locationDetails");
        const pickupInstructions = _.get(clientRequestBody, "pickupInstructions");
        const dropInstructions = _.get(clientRequestBody, "dropInstructions");
        const updateRequestBody = {
            context,
            message: {
                // Construct from the request
            };
        };
        //call protocol update order
        const response = await callUpdate(updateRequestBody);
        res
        .status(200)
        .send({ ...response.data, messageId: context["message_id"] });
    }

BAP server calls protocol update to the network

    async function callUpdate(updateRequestBody) {
        // It lookups the registry for BG OR BPP
        let uri = lookup();
        // Construct Header
        const headers = constructAuthHeader(); // Auth Header with digital Signature
        return axios({ url: `${uri}/delivery/updare`, method: "POST", headers, data: updateRequestBody });
    }

BAP receives protocol on_update

/*
Example Response JSON:
{
    "context": {
        "domain": "delivery",
        "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": "order",
            "state": "Active",
            "items": [
                {
                    "id": "standard",
                    "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": {
                        "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": "Don't ring doorbell"
                    },
                    "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": "50"
                },
                "breakup": [
                    {
                        "title": "Standard delivery",
                        "price": {
                            "currency": "INR",
                            "value": "50"
                        }
                    }
                ],
                "ttl": "P4D"
            },
            "payment": {
                "uri": "https://api.bpp.com/pay?amt=$amount&txn_id=ksh87yriuro34iyr3p5&mode=upi&vpa=bpp@upi",
                "tl_method": "http/get",
                "params": {
                    "transaction_id": "ksh87yriuro34iyr3p5",
                    "amount": "10",
                    "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"
        }
    }
}
*/
    // Auth middleware authenticates the digital signature of the incoming request
    router.post("/delivery/on_update", auth, onTrack);
    async function onTrack({ body }, res) {
        // Save the response to Database
        await saveToDb(body);
    };

Client polls BAP to get the on_update results

    // Endpoint for the client to poll the search data based on the message id
    async function getMessageById(req) {
        try {
            const messageId = _.get(req, "messageId");
            // Get the data using message Id
            const response = await getData(messageId);
            res.status(200).send(httpResponse('ACK', "", response));
        } catch(error) {
            res.status(500).send(httpResponse("NACK", error));
        }
    };