為什麼我的代幣被歸類為 ERC721 而不是 ERC20？

我使用 ERC20Interface 創建了一個 ERC20 令牌，但它在 Mumbai 多邊形掃描中被歸類為 ERC721。可能是什麼原因？

interface IERC20 {
   function totalSupply() external view returns (uint256);
   function decimals() external view returns (uint8);
   function symbol() external view returns (string memory);
   function name() external view returns (string memory);
   function getOwner() external view returns (address);
   function balanceOf(address account) external view returns (uint256);
   function transfer(address recipient, uint256 amount) external returns (bool);
   function allowance(address _owner, address spender) external view returns (uint256);
   function approve(address spender, uint256 amount) external returns (bool);
   function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);

   event Transfer(address indexed from, address indexed to, uint256 indexed value);
   event Approval(address indexed owner, address indexed spender, uint256 indexed value);
}

contract MyToken is IERC20 {
   mapping (address => mapping (address => uint256)) private _allowances;
   mapping (address => uint256) internal _balances;

   uint256 public _totalSupply;
   uint8 public _decimals;
   string public _symbol;
   string public _name;
   address public owner;

   event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

   constructor() {
       owner = msg.sender;
       _name = "MyToken";
       _symbol = "MTK";
       _decimals = 0;
       _totalSupply = 1000000;
       _balances[owner] = _totalSupply;

       emit Transfer(address(0), msg.sender, _totalSupply);
   }

謝謝

原因是事件Transfer有數量索引。這是 ERC721 的模式，而不是 ERC20。

考慮改變：

event Transfer(address indexed from, address indexed to, uint256 indexed value);

至：

event Transfer(address indexed from, address indexed to, uint256 value);

對於Approval.

引用自：https://ethereum.stackexchange.com/questions/134500