title: Laravel PayTM checksum generation in controller
body: <p>i am developing a multi shop Laravel application, where user can choose products from the various shops listed with application, user can select product from single store at a time, i want to configure PayTM payment gateway for every shops listed with application, so payment directly credited in the shop account, from where customer is ordering.</p>
  <p>i have created a payment method table with below fields:</p>
  <pre><code>shop_id,
  api_key &lt;-- unique key for each shop listed,
  PAYTM_MERCHANT_KEY,
  PAYTM_MERCHANT_MID,
  </code></pre>
  <p>How can i generate checksum for requests for payment for different stores?</p>
  <p>Thanx in advance.</p>