dynamic-vietqr/lib/index.js

A class generate dynamic VietQR

"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.VietQr = void 0;
const crc16ccitt_1 = __importDefault(require("crc/crc16ccitt"));
class VietQr {
    constructor(accountOrCardNumber, bnbId) {
        this.accountOrCardNumber = accountOrCardNumber;
        this.bnbId = bnbId;
    }
    formatString(input) {
        const length = input.length;
        if (!isNaN(length)) {
            const formattedLength = length < 10 ? `0${length}${input}` : `${length}${input}`;
            return formattedLength;
        }
        return input;
    }
    dynamicIBFTToAccount(amount, message) {
        return this.qrGeneration({
            amount,
            service: "QRIBFTTA",
            message,
            dynamic: true,
        });
    }
    dynamicIBFTToCard(amount, message) {
        return this.qrGeneration({
            amount,
            service: "QRIBFTTC",
            message,
            dynamic: true,
        });
    }
    staticIBFTToAccount() {
        return this.qrGeneration({ service: "QRIBFTTA", dynamic: false });
    }
    staticIBFTToCard() {
        return this.qrGeneration({ service: "QRIBFTTC", dynamic: false });
    }
    qrGeneration({ amount, service, message, dynamic, }) {
        const payloadFormatIndicator = "000201";
        let point = "11";
        if (dynamic) {
            point = "12";
        }
        const pointofInitiationMethod = `01${this.formatString(point)}`;
        const GUID = `00${this.formatString("A000000727")}`;
        const bnbIdCode = `00${this.formatString(this.bnbId)}`;
        const account = `01${this.formatString(this.accountOrCardNumber)}`;
        const paymentNetworkSpecific = `01${this.formatString(bnbIdCode + account)}`;
        const serviceCode = `02${this.formatString(service)}`;
        const merchantAccountInformation = `38${this.formatString(GUID + paymentNetworkSpecific + serviceCode)}`;
        const transactionCurrency = `53${this.formatString("704")}`;
        let transactionAmount = "";
        if (amount) {
            transactionAmount = `54${this.formatString(amount)}`;
        }
        const countryCode = `58${this.formatString("VN")}`;
        let additional = "";
        if (message) {
            const regex = /^[a-zA-Z0-9 ]{1,25}$/;
            if (!regex.test(message)) {
                throw Error("Message max 25 characters or only letters and numbers and space.");
            }
            const purpose = `08${this.formatString(message)}`;
            additional = `62${this.formatString(purpose)}`;
        }
        const CRC = `6304`;
        const value = payloadFormatIndicator +
            pointofInitiationMethod +
            merchantAccountInformation +
            transactionCurrency +
            transactionAmount +
            countryCode +
            additional +
            CRC;
        let crc = (0, crc16ccitt_1.default)(value).toString(16);
        if (crc.length === 3) {
            crc = `0${crc}`;
        }
        return `${value}${crc.toLocaleUpperCase()}`;
    }
}
exports.VietQr = VietQr;