promptpay/index.js

PromptPay QR Code Toolkit

const { anyId } = require("promptparse/generate");
const QRCode = require("qrcode");

module.exports = {
	/**
	 * 
	 * @param {string} target Mobile No., Tax ID, Ewallet ID, etc.
	 * @param {string} amount Amount to Transfer
	 * @param {string} outputType 'base64url', 'terminal' (default 'base64url')
	 */
	qr: async (target, amount = null, outputType = 'base64url') => {
		let type = 'MSISDN'
		if (target.length == 13) {
			type = 'NATID'
		} else if (target.length >= 15) {
			type = 'EWALLETID'
		}

		const payload = anyId({
			type,
			target,
			amount
		})

		if (outputType == 'terminal') {
			return await QRCode.toString(payload, {
				errorCorrectionLevel: 'M',
			})
		}

		return await QRCode.toDataURL(payload, {
			errorCorrectionLevel: 'M',
		})
	}
};