為什麼我的代幣持有者在 etherscan 上保持為 0

我在 Ropsten 測試網上部署了一個智能合約來創建一個 ERC-20 代幣，但是，即使當我在 Metamask 上添加我的代幣時，它表明我擁有代幣的總供應量，我的代幣所有權在 Etherscan 上保持在 0%。（我使用的是 Metamask 的 beta 版本）

這是我的 SC 的程式碼：

pragma solidity 0.4.21;

contract ERC20Basic {
 uint256 public totalSupply;
 function balanceOf(address who) public view returns (uint256);
 function transfer(address to, uint256 value) public returns (bool);
 event Transfer(address indexed from, address indexed to, uint256 value);
}

contract ERC20 is ERC20Basic {
 function allowance(address owner, address spender) public view returns (uint256);
 function transferFrom(address from, address to, uint256 value) public returns (bool);
 function approve(address spender, uint256 value) public returns (bool);
 event Approval(address indexed owner, address indexed spender, uint256 value);
}

library SafeMath {
     function mul(uint256 a, uint256 b) internal pure returns (uint256) {
   if (a == 0) {
     return 0;
   }
   uint256 c = a * b;
   assert(c / a == b);
   return c;
 }

 function div(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
   uint256 c = a / b;
// assert(a == b * c + a % b); 
   return c;
 }

 function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
 }

 function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
 }
}


contract BasicToken is ERC20Basic {
 using SafeMath for uint256;

 mapping(address => uint256) balances;

 function transfer(address _to, uint256 _value) public returns (bool) {
require(_to != address(0));
require(_value <= balances[msg.sender]);

// SafeMath.sub will throw if there is not enough balance.
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
 }

 function balanceOf(address _owner) public view returns (uint256 balance) {
return balances[_owner];
 }

}

contract StandardToken is ERC20, BasicToken {

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

 function transferFrom(address _from, address _to, uint256 _value) public returns (bool) {
require(_to != address(0));
require(_value <= balances[_from]);
require(_value <= allowed[_from][msg.sender]);

balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit Transfer(_from, _to, _value);
return true;
 }

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

 function allowance(address _owner, address _spender) public view returns (uint256) {
return allowed[_owner][_spender];
 }

 function increaseApproval(address _spender, uint _addedValue) public returns (bool) {
allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue);
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
 }

       function decreaseApproval(address _spender, uint _subtractedValue) public returns (bool) {
uint oldValue = allowed[msg.sender][_spender];
if (_subtractedValue > oldValue) {
 allowed[msg.sender][_spender] = 0;
} else {
 allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);
}
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
 }

   }

contract Ownable {
  address public owner;


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


 function Ownable() public {
owner = msg.sender;
 }

  modifier onlyOwner() {
require(msg.sender == owner);
_;
 }


 function transferOwnership(address newOwner) public onlyOwner {
require(newOwner != address(0));
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
 }

}

contract Pausable is Ownable {
  event Pause();
  event Unpause();

 bool public paused = false;

 modifier whenNotPaused() {
require(!paused);
_;
 }

 modifier whenPaused() {
require(paused);
_;
 }

 function pause() onlyOwner whenNotPaused public {
paused = true;
emit Pause();
 }

  function unpause() onlyOwner whenPaused public {
paused = false;
emit Unpause();
 }
}

contract PausableToken is StandardToken, Pausable {

 function transfer(address _to, uint256 _value) public whenNotPaused returns (bool) {
return super.transfer(_to, _value);
 }

  function transferFrom(address _from, address _to, uint256 _value) public whenNotPaused returns (bool) {
return super.transferFrom(_from, _to, _value);
  }

 function approve(address _spender, uint256 _value) public whenNotPaused returns (bool) {
return super.approve(_spender, _value);
 }

 function increaseApproval(address _spender, uint _addedValue) public whenNotPaused returns (bool success) {
return super.increaseApproval(_spender, _addedValue);
 }

  function decreaseApproval(address _spender, uint _subtractedValue) public whenNotPaused returns (bool success) {
return super.decreaseApproval(_spender, _subtractedValue);
}
}

contract Test is StandardToken, PausableToken {
  string public constant name = 'Test';                                      // Set the token name for display
  string public constant symbol = 'TEST';                                       // Set the token symbol for display
  uint8 public constant decimals = 18;                                          // Set the number of decimals for display
  uint256 public constant INITIAL_SUPPLY = 50000000000 * 10**uint256(decimals);  // 50 billions 

 function Test() public{
totalSupply = INITIAL_SUPPLY;                               // Set the total supply
balances[msg.sender] = INITIAL_SUPPLY;                      // Creator address is assigned all
emit Transfer(0x0, msg.sender, INITIAL_SUPPLY);
 }

  function transfer(address _to, uint256 _value) public whenNotPaused returns (bool) {
require(_to != address(0));
return super.transfer(_to, _value);
  }

  function transferFrom(address _from, address _to, uint256 _value) public whenNotPaused returns (bool) {
require(_to != address(0));
return super.transferFrom(_from, _to, _value);
  }

 function approve(address _spender, uint256 _value) public whenNotPaused returns (bool) {
return super.approve(_spender, _value);
 }

   event Burn(address indexed _burner, uint _value);

   function burn(uint _value) public returns (bool)
{
   balances[msg.sender] = balances[msg.sender].sub(_value);
   totalSupply = totalSupply.sub(_value);
   emit Burn(msg.sender, _value);
   emit Transfer(msg.sender, address(0x0), _value);
   return true;
   }
}

這是 Etherscan 的 API 的一個臨時問題，因為 Ropsten 和 Kovan 測試網的令牌持有者百分比 API 目前似乎已關閉。您也可以通過檢查這些網路上的其他代幣合約來驗證它。

你的合約正確地實現了 ERC-20 所需的所有功能。

您應該等待服務備份並執行，或者嘗試在 API 正常執行的 Rinkeby 測試網上部署您的合約。

引用自：https://ethereum.stackexchange.com/questions/49361