title: Interact with TRC20 tokens in solidity Tron Smart Contract
body: <p>What is the proper method to check for example the USDT balance of a given smart contract within that contract in Solidity?</p>
  <p>For the TRX balance you can just do</p>
  <p><code>uint256 balance = address(this).balance;</code></p>
  <p>But how do you call the USDT balance for that SC?</p>
  <p>Thanks</p>