text: /**********************************************************************
  *These solidity codes have been obtained from Etherscan for extracting
  *the smartcontract related info.
  *The data will be used by MATRIX AI team as the reference basis for
  *MATRIX model analysis,extraction of contract semantics,
  *as well as AI based data analysis, etc.
  **********************************************************************/
  pragma solidity ^ 0.4.18;
  library SafeMath {
      function mul(uint256 a, uint256 b) internal constant returns(uint256) {
          uint256 c = a * b;
          assert(a == 0 || c / a == b);
          return c;
      }
  
      function div(uint256 a, uint256 b) internal constant returns(uint256) {
          uint256 c = a / b;
          return c;
      }
  
      function sub(uint256 a, uint256 b) internal constant returns(uint256) {
          assert(b <= a);
          return a - b;
      }
  
      function add(uint256 a, uint256 b) internal constant returns(uint256) {
          uint256 c = a + b;
          assert(c >= a);
          return c;
      }
  }
  contract CommunityToken {
      using SafeMath
      for uint256;
      mapping(address => mapping(address => uint256)) allowed;
      mapping(address => uint256) balances;
      uint256 public totalSupply;
      uint256 public decimals;
      address public owner;
      bytes32 public symbol;
      event Transfer(address indexed from, address indexed to, uint256 value);
      event Approval(address indexed _owner, address indexed spender, uint256 value);
  
      function CommunityToken() {
          totalSupply = 1000000;
          symbol = 'CMT';
          owner = 0xd21Ef1Fb710c17cA568380f20a3ceE46c254d315;
          balances[owner] = totalSupply;
          decimals = 0;
      }
  
      function balanceOf(address _owner) constant returns(uint256 balance) {
          return balances[_owner];
      }
  
      function allowance(address _owner, address _spender) constant returns(uint256 remaining) {
          return allowed[_owner][_spender];
      }
  
      function transfer(address _to, uint256 _value) returns(bool) {
          balances[msg.sender] = balances[msg.sender].sub(_value);
          balances[_to] = balances[_to].add(_value);
          Transfer(msg.sender, _to, _value);
          return true;
      }
  
      function transferFrom(address _from, address _to, uint256 _value) returns(bool) {
          var _allowance = allowed[_from][msg.sender];
          balances[_to] = balances[_to].add(_value);
          balances[_from] = balances[_from].sub(_value);
          allowed[_from][msg.sender] = _allowance.sub(_value);
          Transfer(_from, _to, _value);
          return true;
      }
  
      function approve(address _spender, uint256 _value) returns(bool) {
          require((_value == 0) || (allowed[msg.sender][_spender] == 0));
          allowed[msg.sender][_spender] = _value;
          Approval(msg.sender, _spender, _value);
          return true;
      }
  
      function() {
          revert();
      }
  }