CleanToken

[
  {
    "inputs": [
      {
        "internalType": "string",
        "name": "navn_",
        "type": "string"
      },
      {
        "internalType": "string",
        "name": "symbol_",
        "type": "string"
      },
      {
        "internalType": "uint256",
        "name": "tilbud_",
        "type": "uint256"
      }
    ],
    "stateMutability": "nonpayable",
    "type": "constructor"
  },
  {
    "anonymous": false,
    "inputs": [
      {
        "indexed": true,
        "internalType": "address",
        "name": "owner",
        "type": "address"
      },
      {
        "indexed": true,
        "internalType": "address",
        "name": "spender",
        "type": "address"
      },
      {
        "indexed": false,
        "internalType": "uint256",
        "name": "value",
        "type": "uint256"
      }
    ],
    "name": "Approval",
    "type": "event"
  },
  {
    "anonymous": false,
    "inputs": [
      {
        "indexed": true,
        "internalType": "address",
        "name": "from",
        "type": "address"
      },
      {
        "indexed": true,
        "internalType": "address",
        "name": "to",
        "type": "address"
      },
      {
        "indexed": false,
        "internalType": "uint256",
        "name": "value",
        "type": "uint256"
      }
    ],
    "name": "Transfer",
    "type": "event"
  },
  {
    "inputs": [],
    "name": "BUILD_ID",
    "outputs": [
      {
        "internalType": "bytes32",
        "name": "",
        "type": "bytes32"
      }
    ],
    "stateMutability": "view",
    "type": "function"
  },
  {
    "inputs": [
      {
        "internalType": "address",
        "name": "owner",
        "type": "address"
      },
      {
        "internalType": "address",
        "name": "spender",
        "type": "address"
      }
    ],
    "name": "allowance",
    "outputs": [
      {
        "internalType": "uint256",
        "name": "",
        "type": "uint256"
      }
    ],
    "stateMutability": "view",
    "type": "function"
  },
  {
    "inputs": [
      {
        "internalType": "address",
        "name": "spender",
        "type": "address"
      },
      {
        "internalType": "uint256",
        "name": "value",
        "type": "uint256"
      }
    ],
    "name": "approve",
    "outputs": [
      {
        "internalType": "bool",
        "name": "",
        "type": "bool"
      }
    ],
    "stateMutability": "nonpayable",
    "type": "function"
  },
  {
    "inputs": [
      {
        "internalType": "address",
        "name": "account",
        "type": "address"
      }
    ],
    "name": "balanceOf",
    "outputs": [
      {
        "internalType": "uint256",
        "name": "",
        "type": "uint256"
      }
    ],
    "stateMutability": "view",
    "type": "function"
  },
  {
    "inputs": [],
    "name": "decimals",
    "outputs": [
      {
        "internalType": "uint8",
        "name": "",
        "type": "uint8"
      }
    ],
    "stateMutability": "pure",
    "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": "to",
        "type": "address"
      },
      {
        "internalType": "uint256",
        "name": "value",
        "type": "uint256"
      }
    ],
    "name": "transfer",
    "outputs": [
      {
        "internalType": "bool",
        "name": "",
        "type": "bool"
      }
    ],
    "stateMutability": "nonpayable",
    "type": "function"
  },
  {
    "inputs": [
      {
        "internalType": "address",
        "name": "from",
        "type": "address"
      },
      {
        "internalType": "address",
        "name": "to",
        "type": "address"
      },
      {
        "internalType": "uint256",
        "name": "value",
        "type": "uint256"
      }
    ],
    "name": "transferFrom",
    "outputs": [
      {
        "internalType": "bool",
        "name": "",
        "type": "bool"
      }
    ],
    "stateMutability": "nonpayable",
    "type": "function"
  }
]

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

interface IERC20 {
    event Transfer(address indexed from, address indexed to, uint256 value);
    event Approval(address indexed owner, address indexed spender, uint256 value);

    function totalSupply() external view returns (uint256);
    function balanceOf(address account) external view returns (uint256);
    function transfer(address to, uint256 value) external returns (bool);
    function allowance(address owner, address spender) external view returns (uint256);
    function approve(address spender, uint256 value) external returns (bool);
    function transferFrom(address from, address to, uint256 value) external returns (bool);
}

interface IERC20Metadata is IERC20 {
    function name() external view returns (string memory);
    function symbol() external view returns (string memory);
    function decimals() external view returns (uint8);
}

contract CleanToken is IERC20, IERC20Metadata {
    bytes32 public constant BUILD_ID = 0x59e6ff9ae15a8067a5af08f2884dcbb5b4e45209d89cc070232f10353a8abf7d;

    string private _navn;
    string private _symbol;
    uint256 private _totalTilbud;

    mapping(address => uint256) private _saldoer;
    mapping(address => mapping(address => uint256)) private _tillatelser;

    constructor(string memory navn_, string memory symbol_, uint256 tilbud_) {
        _navn = navn_;
        _symbol = symbol_;
        uint256 belop = tilbud_ * 10 ** 18;
        _totalTilbud = belop;
        _saldoer[msg.sender] = belop;
        emit Transfer(address(0), msg.sender, belop);
    }

    function name() external view returns (string memory) { return _navn; }
    function symbol() external view returns (string memory) { return _symbol; }
    function decimals() external pure returns (uint8) { return 18; }
    function totalSupply() external view returns (uint256) { return _totalTilbud; }
    function balanceOf(address account) external view returns (uint256) { return _saldoer[account]; }
    function allowance(address owner, address spender) external view returns (uint256) {
        return _tillatelser[owner][spender];
    }

    function transfer(address to, uint256 value) external returns (bool) {
        _overfor(msg.sender, to, value);
        return true;
    }

    function approve(address spender, uint256 value) external returns (bool) {
        _godkjenn(msg.sender, spender, value);
        return true;
    }

    function transferFrom(address from, address to, uint256 value) external returns (bool) {
        uint256 naavaerende = _tillatelser[from][msg.sender];
        if (naavaerende != type(uint256).max) {
            require(naavaerende >= value, "ERC20: utilstrekkelig tillatelse");
            unchecked { _godkjenn(from, msg.sender, naavaerende - value); }
        }
        _overfor(from, to, value);
        return true;
    }

    function _overfor(address from, address to, uint256 value) private {
        require(from != address(0), "ERC20: overfor fra null");
        require(to != address(0), "ERC20: overfor til null");
        uint256 fraSaldo = _saldoer[from];
        require(fraSaldo >= value, "ERC20: utilstrekkelig saldo");
        unchecked {
            _saldoer[from] = fraSaldo - value;
            _saldoer[to] += value;
        }
        emit Transfer(from, to, value);
    }

    function _godkjenn(address owner, address spender, uint256 value) private {
        require(owner != address(0), "ERC20: godkjenn fra null");
        require(spender != address(0), "ERC20: godkjenn til null");
        _tillatelser[owner][spender] = value;
        emit Approval(owner, spender, value);
    }
}