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tusuii
34
src/utils/mailer.js
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34
src/utils/mailer.js
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const nodemailer = require('nodemailer');
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const ejs = require('ejs');
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const path = require('path');
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const transporter = nodemailer.createTransport({
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service: 'gmail',
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auth: {
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user: process.env.EMAIL_USER,
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pass: process.env.EMAIL_PASS,
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},
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});
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const sendEmail = async (to, subject, templateName, templateData) => {
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// Render EJS template
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const templatePath = path.join(__dirname, '../views/emails', `${templateName}.ejs`);
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const html = await ejs.renderFile(templatePath, templateData);
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const mailOptions = {
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from: `"VC E-Commerce" <${process.env.EMAIL_USER}>`,
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to,
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subject,
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html,
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};
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try {
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await transporter.sendMail(mailOptions);
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console.log('Email sent to', to);
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} catch (err) {
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console.error('Error sending email', err);
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throw new Error('Failed to send email');
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}
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};
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module.exports = sendEmail;
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315
src/utils/paytm.js
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315
src/utils/paytm.js
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@@ -0,0 +1,315 @@
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// utils/paytm.js
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const https = require('https');
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const crypto = require('crypto');
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/**
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* Paytm Configuration
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* Add these to your .env file:
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* PAYTM_MERCHANT_ID=your_merchant_id
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* PAYTM_MERCHANT_KEY=your_merchant_key
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* PAYTM_WEBSITE=WEBSTAGING (for staging) or your website name
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* PAYTM_CHANNEL_ID=WEB
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* PAYTM_INDUSTRY_TYPE=Retail
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* PAYTM_HOST=securegw-stage.paytm.in (for staging) or securegw.paytm.in (for production)
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*/
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const PaytmConfig = {
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mid: process.env.PAYTM_MERCHANT_ID,
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key: process.env.PAYTM_MERCHANT_KEY,
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website: process.env.PAYTM_WEBSITE || 'WEBSTAGING',
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channelId: process.env.PAYTM_CHANNEL_ID || 'WEB',
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industryType: process.env.PAYTM_INDUSTRY_TYPE || 'Retail',
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host: process.env.PAYTM_HOST || 'securegw-stage.paytm.in',
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callbackUrl: process.env.PAYTM_CALLBACK_URL || 'http://localhost:3000/api/payments/paytm/callback',
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};
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console.log(
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'Merchant Key Length:',
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process.env.PAYTM_MERCHANT_KEY.length
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);
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/**
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* Generate Paytm Checksum
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*/
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const generateChecksum = (params, merchantKey) => {
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return new Promise((resolve, reject) => {
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try {
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const data = JSON.stringify(params);
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const salt = crypto.randomBytes(4).toString('hex');
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const hash = crypto
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.createHash('sha256')
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.update(data + salt)
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.digest('hex');
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const checksum = hash + salt;
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const encryptedChecksum = encrypt(checksum, merchantKey);
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resolve(encryptedChecksum);
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} catch (err) {
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reject(err);
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}
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});
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};
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/**
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* Verify Paytm Checksum
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*/
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const verifyChecksum = (params, merchantKey, checksumHash) => {
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return new Promise((resolve, reject) => {
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try {
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const decrypted = decrypt(checksumHash, merchantKey);
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const salt = decrypted.slice(-8);
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const hash = crypto
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.createHash('sha256')
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.update(JSON.stringify(params) + salt)
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.digest('hex');
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resolve(hash + salt === decrypted);
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} catch (err) {
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reject(err);
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}
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});
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};
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/**
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* Encrypt data using AES-128-CBC (Paytm standard)
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*/
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const encrypt = (data, key) => {
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if (key.length !== 16) {
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throw new Error('Paytm Merchant Key must be exactly 16 characters');
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}
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const iv = Buffer.from('@@@@&&&&####$$$$'); // Paytm fixed IV
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const cipher = crypto.createCipheriv(
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'aes-128-cbc',
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Buffer.from(key, 'utf8'),
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iv
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);
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let encrypted = cipher.update(data, 'utf8', 'base64');
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encrypted += cipher.final('base64');
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return encrypted;
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};
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/**
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* Decrypt data using AES-128-CBC
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*/
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const decrypt = (encryptedData, key) => {
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const iv = Buffer.from('@@@@&&&&####$$$$');
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const decipher = crypto.createDecipheriv(
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'aes-128-cbc',
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Buffer.from(key, 'utf8'),
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iv
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);
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let decrypted = decipher.update(encryptedData, 'base64', 'utf8');
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decrypted += decipher.final('utf8');
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return decrypted;
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};
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/**
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* Initiate Paytm Transaction
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*/
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const initiateTransaction = async (orderId, amount, customerId, email, mobile) => {
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const paytmParams = {
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body: {
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requestType: 'Payment',
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mid: PaytmConfig.mid,
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websiteName: PaytmConfig.website,
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orderId: orderId,
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callbackUrl: PaytmConfig.callbackUrl,
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txnAmount: {
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value: amount.toString(),
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currency: 'INR',
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},
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userInfo: {
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custId: customerId,
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email: email,
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mobile: mobile,
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},
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},
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};
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const checksum = await generateChecksum(
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JSON.stringify(paytmParams.body),
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PaytmConfig.key
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);
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paytmParams.head = {
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signature: checksum,
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};
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return new Promise((resolve, reject) => {
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const options = {
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hostname: PaytmConfig.host,
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port: 443,
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path: `/theia/api/v1/initiateTransaction?mid=${PaytmConfig.mid}&orderId=${orderId}`,
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method: 'POST',
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headers: {
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'Content-Type': 'application/json',
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},
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};
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const req = https.request(options, (res) => {
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let data = '';
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res.on('data', (chunk) => {
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data += chunk;
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});
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res.on('end', () => {
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try {
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const response = JSON.parse(data);
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resolve({
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success: true,
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txnToken: response.body.txnToken,
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orderId: orderId,
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amount: amount,
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...response,
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});
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} catch (error) {
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reject(error);
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}
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});
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});
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req.on('error', (error) => {
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reject(error);
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});
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req.write(JSON.stringify(paytmParams));
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req.end();
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});
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};
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/**
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* Check Transaction Status
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*/
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const checkTransactionStatus = async (orderId) => {
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const paytmParams = {
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body: {
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mid: PaytmConfig.mid,
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orderId: orderId,
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},
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};
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const checksum = await generateChecksum(
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JSON.stringify(paytmParams.body),
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PaytmConfig.key
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);
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paytmParams.head = {
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signature: checksum,
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};
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return new Promise((resolve, reject) => {
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const options = {
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hostname: PaytmConfig.host,
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port: 443,
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path: `/v3/order/status`,
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method: 'POST',
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headers: {
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'Content-Type': 'application/json',
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},
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};
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const req = https.request(options, (res) => {
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let data = '';
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res.on('data', (chunk) => {
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data += chunk;
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});
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res.on('end', () => {
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try {
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const response = JSON.parse(data);
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resolve(response);
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} catch (error) {
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reject(error);
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}
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});
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});
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req.on('error', (error) => {
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reject(error);
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});
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req.write(JSON.stringify(paytmParams));
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req.end();
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});
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};
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/**
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* Process Refund
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*/
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const processRefund = async (orderId, refId, txnId, amount) => {
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const paytmParams = {
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body: {
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mid: PaytmConfig.mid,
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orderId: orderId,
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refId: refId,
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txnId: txnId,
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txnType: 'REFUND',
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refundAmount: amount.toString(),
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},
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};
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const checksum = await generateChecksum(
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JSON.stringify(paytmParams.body),
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PaytmConfig.key
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);
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paytmParams.head = {
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signature: checksum,
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};
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return new Promise((resolve, reject) => {
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const options = {
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hostname: PaytmConfig.host,
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port: 443,
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path: `/refund/apply`,
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method: 'POST',
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headers: {
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'Content-Type': 'application/json',
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},
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};
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const req = https.request(options, (res) => {
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let data = '';
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res.on('data', (chunk) => {
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data += chunk;
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});
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res.on('end', () => {
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try {
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const response = JSON.parse(data);
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resolve(response);
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} catch (error) {
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reject(error);
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}
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});
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});
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req.on('error', (error) => {
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reject(error);
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});
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req.write(JSON.stringify(paytmParams));
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req.end();
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});
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};
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module.exports = {
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PaytmConfig,
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generateChecksum,
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verifyChecksum,
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initiateTransaction,
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checkTransactionStatus,
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processRefund,
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};
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23
src/utils/uploadToS3.js
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23
src/utils/uploadToS3.js
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@@ -0,0 +1,23 @@
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const { PutObjectCommand } = require("@aws-sdk/client-s3");
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const s3 = require("../config/s3");
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const { v4: uuidv4 } = require("uuid");
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const uploadToS3 = async (file, folder = "products") => {
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const ext = file.originalname.split(".").pop();
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const key = `${folder}/${uuidv4()}.${ext}`;
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await s3.send(
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new PutObjectCommand({
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Bucket: process.env.AWS_S3_BUCKET,
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Key: key,
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Body: file.buffer,
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ContentType: file.mimetype,
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})
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);
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// return `${process.env.AWS_ENDPOINT}/${process.env.AWS_S3_BUCKET}/${key}`;
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return `https://${process.env.AWS_ENDPOINT}/${process.env.AWS_S3_BUCKET}/${key}`;
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};
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module.exports = uploadToS3;
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