After creating a contract instance, you can execute the contract's methods.
Use call to execute a pure or view smart contract method.
Use send to execute a non-pure or modify smart contract method.
Please refer to method.call(), method.send().
There are two ways to create a contract instance:
//Example 1
let abi = [...];
let instance = await tronWeb.contract(abi,'contractAddress');
//Example 2
let instance = await tronWeb.contract.at('contractAddress');