khofesh

//SPDX-License-Identifier: MIT

pragma solidity 0.6.12;

contract Exceptions {
    mapping(address => uint64) public balanceReceived;
    
    function receiveMoney() public payable {
        assert(msg.value == uint64(msg.value));
        balanceReceived[msg.sender] += uint64(msg.value);

khofesh

//SPDX-License-Identifier: MIT

pragma solidity 0.8.4;

contract AlwaysFails {
    function aFunction() public {
        require(false, "Error message");
    }
}

khofesh

//SPDX-License-Identifier: MIT

pragma solidity 0.8.3;

contract FunctionsExample {
    mapping(address => uint) public balanceReceived;
    
    address payable owner;
    
    constructor() {

khofesh

pragma solidity ^0.8.4;

import "./Owned.sol";

contract InheritanceModifier is Owned {
    mapping(address => uint) public tokenBalance;
    
    
    uint tokenPrice = 1 ether;
    

khofesh

pragma solidity ^0.8.4;

contract Owned {
    address owner;
    
    constructor() {
        owner = msg.sender;
    }
    
    modifier onlyOwner {

khofesh

pragma solidity ^0.8.4;

contract EventExample {
    mapping(address => uint) public tokenBalance;
    
    event TokensSent(address _from, address _to, uint _amount);
    
    constructor() {
        tokenBalance[msg.sender] = 100;
    }

khofesh

pragma solidity ^0.8.4;

contract AbiExample {
    string public myString = "hello world!";
}