Solidity try/catch demonstration

TryCatch.sol

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.10;

/*
You can only apply a try/catch block to a function called externally. An external
function call is a message call, whereas an internal function call is just a jump.
This snippet shows the same function, f1(), called internally and externally. The
internal call code does not compile.
*/
contract Foo {
    function f1() public pure {
        revert("Why are you calling me?!");
    }

    // // This function doesn't compile
    // function callF1Internal() external returns (bool) {
    //     try f1() {
    //         return true;
    //     } catch {
    //         return false;
    //     }
    // }

    // This function compiles
    function callF1External() external returns (bool) {
        try this.f1() {
            return true;
        } catch {
            return false;
        }
    }
}