Error Types In Solidity

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// SPDX-License-Identifier: GPL-3.0

pragma solidity >=0.7.0 <0.9.0;

/// @notice About Errors
contract AboutErrors{

    uint num = 11;
    uint public changeAbleState = 15;

    // no gas 
    //use require most often
    function testRequire() view public {
        require(num < 10, "num should less than 10");
    }

    // no gas
    //having some complex nested if/else logic flow. then use revert than require
    function testRevert() view public {
        if(num > 10){
            revert("num should less than 10");
        }
        
    }

    // no gas
    // probably use assert less often
    // assert checks for internal errors
    function testAssert() view public {
        assert(num < 10);
    }

    // take gas = 23640
    function testPayableRequire() payable public {
        require(num < 10, "num should less than 10");
    }

    // take gas = 23687
    function testPayableRevert() payable public {
        if(num > 10){
            revert("num should less than 10");
        }
    }

    // take gas: 23314
    //low gas as compair to require and revert
    function testPayableAssert() payable public {
        assert(num < 10);
    }

    // take gas: 28722
    function testStateChangeRequire() public {
        changeAbleState = 20;
        require(num < 10, "num should less than 10");
    }

    // take gas: 28703
    function testStateChangeRevert()  public {
        changeAbleState = 20;
        if(num > 10){
            revert("num should less than 10");
        }
        
    }

    //take gas: 28396
    function testStateChangeAssert()  public {
        changeAbleState = 20;
        assert(num < 10);
    }

    // custom error

    error MyCustomError(uint, address);

    function testCustomError() view public {
        revert MyCustomError(23, msg.sender);
    }


}
Shabair

Error Types In Solidity

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