完成此 BEP20 的合約代幣需要什麼？

我想弄清楚總供應量的 80% 是否分配給了網路？如果我在這裡缺少任何基本的東西？

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
   
contract Token {
   mapping(address => uint) public balances;
   mapping(address => mapping(address => uint)) public allowance;
   uint public totalSupply = 1000000000 * 10 ** 18;
   string public name = "alex";
   string public symbol = "ali";
   uint public decimals = 18;
   event Transfer(address indexed from, address indexed to, uint value);
   event Approval(address indexed owner, address indexed spender, uint value);
   
   constructor() {
       totalSupply = (totalSupply*80)/100;
       balances[msg.sender] = (totalSupply*20)/100;
   }
//    constructor () public totalSupply ("alex", "ali"){
//      _mint(msg.sender, 100000000 *(10 ** unit256(decimals())));
   
//} 
   
   function balanceOf(address owner) public returns(uint) {
       return balances[owner];
   }
   
   function transfer(address to, uint value) public returns(bool) {
       require(balanceOf(msg.sender) >= value, 'balance too low');
       //uint mymoney=(totalSupply*20)/100;
       balances[to] += totalSupply;
       balances[msg.sender] -= value;
       balances[msg.sender] += balances[msg.sender];

       //balances[to] += value;
       //balances[msg.sender] -= value;
      emit Transfer(msg.sender, to, value);
       return true;
   }
   
   function _mint(address account, uint256 amount) internal virtual {
       require(account != address(0), "ERC20: mint to the zero address");

       //beforeTokenTransfer(address(0), account, amount);
       //totalSupply = msg.sender * 0.20; //20%
       //totalSupply = mymoney;
       balances[account] += amount;
       emit Transfer(address(0), account, amount);

       //afterTokenTransfer(address(0), account, amount);
   }
   
   function transferFrom(address from, address to, uint value) public returns(bool) {
       require(balanceOf(from) >= value, 'balance too low');
       require(allowance[from][msg.sender] >= value, 'allowance too low');
       balances[to] += value;
       balances[from] -= value;
       emit Transfer(from, to, value);
       return true;   
   }
   
   function approval(address spender, uint value) public returns (bool) {
       allowance[msg.sender][spender] = value;
       emit Approval(msg.sender, spender, value);
       return true;   
   }

   
}
   

BEP20 規範在這裡。

它缺少一些方法：

• 津貼
• 批准
• 獲取所有者

某些方法的簽名錯誤

• 小數點

這個答案是快速瀏覽，所以其他事情可能是錯誤的。

//這是一個更新的版本。謝謝你們的意見。//

// SPDX-License-Identifier: MIT

pragma solidity 0.8.4;



contract Alex{
   
   string public name;
   string public symbol ;
   uint256   _totalSupply; 
   uint8 public decimals ;
    uint _publicmoney;
     address public myaddress=address(this);

   event Transfer(address indexed _from, address indexed _to, uint256 _value);

   event Approval(
       address indexed _owner,
       address indexed _spender,
       uint256 _value
   );

   mapping(address => uint256) public balanceOf;
   mapping(address => mapping(address => uint256)) public allowance;

  
   constructor()  {
        name = "Alex";
    symbol = "ali";
    _totalSupply = 1000000000 * 10 ** 18; // 1 billion tokens
    decimals = 18;


      myaddress=address(this);
      balanceOf[myaddress] =(_totalSupply*80)/100;
       _publicmoney =(_totalSupply*20)/100;
       balanceOf[msg.sender]= _publicmoney;
   }
   
   


   function ownmoney() public view returns (uint256) {
       return  balanceOf[myaddress];
   }
     
   function totalSupply() public view returns (uint256) {
       return  _publicmoney;
   }
   function transfer(address _to, uint256 _value)
       public
       returns (bool success)


   {
       require(balanceOf[msg.sender] >= _value);
       balanceOf[msg.sender] -= _value;
       balanceOf[_to] += _value;
       emit Transfer(msg.sender, _to, _value);
       return true;
   }



   function approve(address _spender, uint256 _value)
       public
       returns (bool success)
   {
       allowance[myaddress];
       allowance[msg.sender][_spender] = _value;
       emit Approval(msg.sender, _spender, _value);
       return true;
   }


   function transferFrom(
       address _from,
       address _to,
       uint256 _value
   ) public returns (bool success) {
       require(_value <= balanceOf[_from]);
       require(_value <= allowance[_from][msg.sender]);
       balanceOf[_from] -= _value;
       balanceOf[_to] += _value;
       allowance[_from][msg.sender] -= _value;
       emit Transfer(_from, _to, _value);
       return true;
   }
}

引用自：https://ethereum.stackexchange.com/questions/115315