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// SPDX-License-Identifier: MIT

pragma solidity ^0.8.4;

contract MagicDao {
    
    string public constant name = "MagicDao";
    string public constant symbol = "MAGIC";
    uint8 public constant decimals = 18; 

    event Transfer(address indexed from, address indexed to, uint tokens);
    event approval (address indexed tokenOwner, address indexed spender, uint tokens);
    
    uint256 totalSupply_;

    mapping(address => uint256) balances;
    mapping(address => mapping (address => uint256) ) allowed; 


    constructor(){
        totalSupply_ = 1000000000000000000000000000000;
        balances[msg.sender] = totalSupply_;
    }
    function totalSupply() public view returns (uint256){
        return totalSupply_;

    }
    function balanceOf(address tokenOwner) public view returns(uint){
        return balances[tokenOwner];

    }
    function transfer (address receiver, uint numTokens) public returns (bool){
        require(numTokens <= balances[msg.sender]);
        balances[msg.sender] = balances[msg.sender] - numTokens;
        balances[receiver] = balances[receiver] + numTokens;
        emit Transfer(msg.sender, receiver, numTokens);
        return true; 
    }
    function approve(address delegate, uint numTokens) public returns (bool){
        allowed[msg.sender][delegate] = numTokens;
        emit approval(msg.sender,delegate, numTokens);
        return true;

    }    
    function allowance (address owner, address delegate) public view returns (uint){
        return allowed[owner][delegate];

    }
    function transferFrom(address owner, address buyer, uint numTokens) public returns (bool){
        require (numTokens<= balances[owner]);
        require(numTokens <= allowed [owner][msg.sender]);
        balances[owner]= balances [owner]- numTokens;
        allowed[owner][msg.sender] = allowed [owner][msg.sender] - numTokens;
        balances[buyer] = balances[buyer] + numTokens;
        emit Transfer(owner,buyer,numTokens);
        return true;
    }

}

{
  "optimizer": {
    "enabled": false,
    "runs": 200
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  }
}

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[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"tokens","type":"uint256"}],"name":"Transfer","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"tokenOwner","type":"address"},{"indexed":true,"internalType":"address","name":"spender","type":"address"},{"indexed":false,"internalType":"uint256","name":"tokens","type":"uint256"}],"name":"approval","type":"event"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"delegate","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"delegate","type":"address"},{"internalType":"uint256","name":"numTokens","type":"uint256"}],"name":"approve","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"tokenOwner","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"receiver","type":"address"},{"internalType":"uint256","name":"numTokens","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"buyer","type":"address"},{"internalType":"uint256","name":"numTokens","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"}]

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