upiqrcode/lib/index.js

Unofficial UPI QR code generator for Node.js with TypeScript support. Educational project - not affiliated with NPCI or financial institutions.

"use strict";
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
    return new (P || (P = Promise))(function (resolve, reject) {
        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
        function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
        step((generator = generator.apply(thisArg, _arguments || [])).next());
    });
};
Object.defineProperty(exports, "__esModule", { value: true });
const QRCode = require("qrcode");
function validateParams({ payeeVPA: pa, payeeName: pn }) {
    let error = "";
    if (!pa || !pn) {
        error = "Virtual Payee's Address/Payee's Name is compulsory";
    }
    else if (pa.trim().length < 5 || pn.trim().length < 4) {
        error = "Virtual Payee's Address/Payee's Name is too short.";
    }
    return error;
}
function buildUrl(baseUrl, params) {
    let url = baseUrl;
    const queryParams = [];
    for (const [key, value] of Object.entries(params)) {
        if (value && value.trim() !== '') {
            queryParams.push(encodeURIComponent(key) + "=" + encodeURIComponent(value));
        }
    }
    if (queryParams.length > 0) {
        url += queryParams.join("&");
    }
    return url;
}
function upiqrcode(_a) {
    return __awaiter(this, arguments, void 0, function* ({ payeeVPA: pa, payeeName: pn, payeeMerchantCode: me, transactionId: tid, transactionRef: tr, transactionNote: tn, amount: am, minimumAmount: mam, currency: cu, transactionRefUrl: url, }) {
        return new Promise((resolve, reject) => {
            const error = validateParams({ payeeVPA: pa, payeeName: pn });
            if (error) {
                reject(new Error(error));
                return;
            }
            let intent = "upi://pay?";
            const params = {};
            // Add required parameters
            if (pa)
                params.pa = pa;
            if (pn)
                params.pn = pn;
            // Add optional parameters
            if (am)
                params.am = am;
            if (mam)
                params.mam = mam;
            if (cu)
                params.cu = cu;
            if (me)
                params.me = me;
            if (tid)
                params.tid = tid;
            if (tr)
                params.tr = tr;
            if (tn)
                params.tn = tn;
            if (url)
                params.url = url;
            intent = buildUrl(intent, params);
            const opts = {
                quality: 1.0,
                margin: 3,
                scale: 10,
            };
            QRCode.toDataURL(intent, opts, (err, qr) => {
                if (err) {
                    reject(new Error("Unable to generate UPI QR Code."));
                    return;
                }
                resolve({ qr, intent });
            });
        });
    });
}
exports.default = upiqrcode;