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  1. pragma solidity ^0.4.11;
  2.  
  3. contract Token {
  4.     string public symbol = "";
  5.     string public name = "";
  6.     uint8 public constant decimals = 18;
  7.     uint256 _totalSupply = 0;
  8.     address owner = 0;
  9.     bool setupDone = false;
  10.    
  11.     event Transfer(address indexed _from, address indexed _to, uint256 _value);
  12.     event Approval(address indexed _owner, address indexed _spender, uint256 _value);
  13.  
  14.     mapping(address => uint256) balances;
  15.  
  16.     mapping(address => mapping (address => uint256)) allowed;
  17.  
  18.     function Token(address adr) {
  19.         owner = adr;        
  20.     }
  21.    
  22.     function SetupToken(string tokenName, string tokenSymbol, uint256 tokenSupply)
  23.     {
  24.         if (msg.sender == owner && setupDone == false)
  25.         {
  26.             symbol = tokenSymbol;
  27.             name = tokenName;
  28.             _totalSupply = tokenSupply * 1000000000000000000;
  29.             balances[owner] = _totalSupply;
  30.             setupDone = true;
  31.         }
  32.     }
  33.  
  34.     function totalSupply() constant returns (uint256 totalSupply) {        
  35.         return _totalSupply;
  36.     }
  37.  
  38.     function balanceOf(address _owner) constant returns (uint256 balance) {
  39.         return balances[_owner];
  40.     }
  41.  
  42.     function transfer(address _to, uint256 _amount) returns (bool success) {
  43.         if (balances[msg.sender] >= _amount
  44.             && _amount > 0
  45.             && balances[_to] + _amount > balances[_to]) {
  46.             balances[msg.sender] -= _amount;
  47.             balances[_to] += _amount;
  48.             Transfer(msg.sender, _to, _amount);
  49.             return true;
  50.         } else {
  51.             return false;
  52.         }
  53.     }
  54.  
  55.     function transferFrom(
  56.         address _from,
  57.         address _to,
  58.         uint256 _amount
  59.     ) returns (bool success) {
  60.         if (balances[_from] >= _amount
  61.             && allowed[_from][msg.sender] >= _amount
  62.             && _amount > 0
  63.             && balances[_to] + _amount > balances[_to]) {
  64.             balances[_from] -= _amount;
  65.             allowed[_from][msg.sender] -= _amount;
  66.             balances[_to] += _amount;
  67.             Transfer(_from, _to, _amount);
  68.             return true;
  69.         } else {
  70.             return false;
  71.         }
  72.     }
  73.  
  74.     function approve(address _spender, uint256 _amount) returns (bool success) {
  75.         allowed[msg.sender][_spender] = _amount;
  76.         Approval(msg.sender, _spender, _amount);
  77.         return true;
  78.     }
  79.  
  80.     function allowance(address _owner, address _spender) constant returns (uint256 remaining) {
  81.         return allowed[_owner][_spender];
  82.     }
  83. }
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