title: Freecharge wallet integration in android
body: <p>I am working in Freecharge wallet integration in android. we purchased an merchant id and integration key too.</p>
  
  <p>I followed the instruction given in the Freecharge guide but I stuck with an error message in my log as <strong>"Invalid checksum/Checksum mismatch"</strong> </p>
  
  <p>At present I am waiting for the freecharge customer care to reply for the error</p>
  
  <p>Kindly help me to get through this issue if any of you as integrated this freecharge wallet integration.</p>
  
  <p>I cameup with the screenshot of the code and the error log</p>
  
  <p>Code</p>
  
  <p><a href="https://i.stack.imgur.com/uMFl6.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/uMFl6.png" alt="Code"></a></p>
  
  <p>Code Continue...
  <a href="https://i.stack.imgur.com/axzOo.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/axzOo.png" alt="Code Continue..."></a></p>
  
  <p>Error Log</p>
  
  <p><a href="https://i.stack.imgur.com/GJAtH.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/GJAtH.png" alt="Error Log"></a></p>