creation_sourcecode: // SPDX-License-Identifier: MIT
  
  /**
  
  
  */
  
  
  pragma solidity ^0.8.7;
  
  contract MARVIN {
      mapping(address => uint256) private _balances;
  
      mapping(address => mapping(address => uint256)) private _allowances;
  
      string private constant _name = "MARVIN INU";
      string private constant _symbol = "MARVIN";
      uint8 private constant _decimals = 18;
      uint256 private constant _totalSupply = 69_000_000 * 10**_decimals;
  
  
      event Transfer(address indexed from, address indexed to, uint256 value);
  
      event Approval(
          address indexed owner,
          address indexed spender,
          uint256 value
      );
  
  
      constructor() {
          _balances[msg.sender] = _totalSupply;
          emit Transfer(address(0), msg.sender, _totalSupply);
          
      }
      
  
      function name() external view virtual returns (string memory) {
          return _name;
      }
  
      function symbol() external view virtual returns (string memory) {
          return _symbol;
      }
  
      function decimals() external view virtual returns (uint8) {
          return _decimals;
      }
  
      function totalSupply() external view virtual returns (uint256) {
          return _totalSupply;
      }
  
      function balanceOf(address account)
          external
          view
          virtual
          returns (uint256)
      {
          return _balances[account];
      }
  
      function transfer(address to, uint256 amount)
          external
          virtual
          returns (bool)
      {
          address owner = msg.sender;
          require(owner != to, "ERC20: transfer to address cannot be owner");
          _transfer(owner, to, amount);
          return true;
      }
  
      function allowance(address owner, address spender)
          public
          view
          virtual
          returns (uint256)
      {
          return _allowances[owner][spender];
      }
  
      function approve(address spender, uint256 amount)
          external
          virtual
          returns (bool)
      {
          address owner = msg.sender;
          _approve(owner, spender, amount);
          return true;
      }
  
      function transferFrom(
          address from,
          address to,
          uint256 amount
      ) external virtual returns (bool) {
          address spender = msg.sender;
          require(
              spender != from,
              "ERC20: transferFrom spender can not be the from"
          );
          _spendAllowance(from, spender, amount);
          _transfer(from, to, amount);
          return true;
      }
  
      function increaseAllowance(address spender, uint256 addedValue)
          external
          virtual
          returns (bool)
      {
          address owner = msg.sender;
          _approve(owner, spender, allowance(owner, spender) + addedValue);
          return true;
      }
  
      function decreaseAllowance(address spender, uint256 subtractedValue)
          external
          virtual
          returns (bool)
      {
          address owner = msg.sender;
          uint256 currentAllowance = allowance(owner, spender);
          require(
              currentAllowance >= subtractedValue,
              "ERC20: decreased allowance below zero"
          );
          unchecked {
              _approve(owner, spender, currentAllowance - subtractedValue);
          }
  
          return true;
      }
  
      function _transfer(
          address from,
          address to,
          uint256 amount
      ) internal virtual {
          require(from != address(0), "ERC20: transfer from the zero address");
          require(to != address(0), "ERC20: transfer to the zero address");
          require(amount > 0, "ERC20: transfer amount must be greater than zero");
  
  
          uint256 fromBalance = _balances[from];
          require(
              fromBalance >= amount,
              "ERC20: transfer amount exceeds balance"
          );
          unchecked {
              _balances[from] = fromBalance - amount;
          }
          _balances[to] += amount;
  
          emit Transfer(from, to, amount);
      }
  
      function _approve(
          address owner,
          address spender,
          uint256 amount
      ) internal virtual {
          require(owner != address(0), "ERC20: approve from the zero address");
          require(spender != address(0), "ERC20: approve to the zero address");
  
          _allowances[owner][spender] = amount;
          emit Approval(owner, spender, amount);
      }
  
      function _spendAllowance(
          address owner,
          address spender,
          uint256 amount
      ) internal virtual {
          uint256 currentAllowance = allowance(owner, spender);
          if (currentAllowance != type(uint256).max) {
              require(
                  currentAllowance >= amount,
                  "ERC20: insufficient allowance"
              );
              unchecked {
                  _approve(owner, spender, currentAllowance - amount);
              }
          }
      }
  }