title: how to swap Token for ETH with swapExactTokensForETH() using UniswapV2Router02 Contract
body: <p>i'm traying to swap some DAI for ETH on the Ropsten Network using the UniswapV2Router02 on Etherscan (Ropsten Test Network).</p>
  <p>DAI Address on Ropsten = 0xad6d458402f60fd3bd25163575031acdce07538d
  WETH = 0xc778417E063141139Fce010982780140Aa0cD5Ab</p>
  <p>in my Wallet i have 2000 DAI (Ropsten)</p>
  <p>but when i put the data there. like this:
  <a href="https://i.stack.imgur.com/y7nCp.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/y7nCp.png" alt="enter image description here" /></a></p>
  <p>Metamask shows that there is an Error thrown by the Contract.
  So i might be missing something or am'i doing it wrong.</p>
  <p><a href="https://i.stack.imgur.com/tRhMk.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/tRhMk.png" alt="enter image description here" /></a></p>
  <p>can please someone help and show me how can i make a successful transaction there ?</p>