pragma solidity ^0.4.19;

/*
GECO
Version 1.01
Release date: 2018-09-24
*/

// File: zeppelin-solidity/contracts/math/SafeMath.sol

/**
 * @title SafeMath
 * @dev Math operations with safety checks that throw on error
 */
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); // There is no case in which this doesn't hold
    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;
  }
}

// File: zeppelin-solidity/contracts/ownership/Ownable.sol

/**
 * @title Ownable
 * @dev The Ownable contract has an owner address, and provides basic authorization control
 * functions, this simplifies the implementation of "user permissions".
 */
contract Ownable {
  address public owner;


  event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);


  /**
   * @dev The Ownable constructor sets the original `owner` of the contract to the sender
   * account.
   */
  function Ownable() public {
    owner = msg.sender;
  }


  /**
   * @dev Throws if called by any account other than the owner.
   */
  modifier onlyOwner() {
    require(msg.sender == owner);
    _;
  }


  /**
   * @dev Allows the current owner to transfer control of the contract to a newOwner.
   * @param newOwner The address to transfer ownership to.
   */
  function transferOwnership(address newOwner) public onlyOwner {
    require(newOwner != address(0));
    OwnershipTransferred(owner, newOwner);
    owner = newOwner;
  }

}

// File: zeppelin-solidity/contracts/token/ERC20Basic.sol

/**
 * @title ERC20Basic
 * @dev Simpler version of ERC20 interface
 * @dev see https://github.com/ethereum/EIPs/issues/179
 */
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);
}

// File: zeppelin-solidity/contracts/token/BasicToken.sol

/**
 * @title Basic token
 * @dev Basic version of StandardToken, with no allowances.
 */
contract BasicToken is ERC20Basic {
  using SafeMath for uint256;

  mapping(address => uint256) balances;

  /**
  * @dev transfer token for a specified address
  * @param _to The address to transfer to.
  * @param _value The amount to be transferred.
  */
  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);
    Transfer(msg.sender, _to, _value);
    return true;
  }

  /**
  * @dev Gets the balance of the specified address.
  * @param _owner The address to query the the balance of.
  * @return An uint256 representing the amount owned by the passed address.
  */
  function balanceOf(address _owner) public view returns (uint256 balance) {
    return balances[_owner];
  }

}

// File: zeppelin-solidity/contracts/token/ERC20.sol

/**
 * @title ERC20 interface
 * @dev see https://github.com/ethereum/EIPs/issues/20
 */
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);
}

// File: zeppelin-solidity/contracts/token/StandardToken.sol

/**
 * @title Standard ERC20 token
 *
 * @dev Implementation of the basic standard token.
 * @dev https://github.com/ethereum/EIPs/issues/20
 * @dev Based on code by FirstBlood: https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol
 */
contract StandardToken is ERC20, BasicToken {

  mapping (address => mapping (address => uint256)) internal allowed;


  /**
   * @dev Transfer tokens from one address to another
   * @param _from address The address which you want to send tokens from
   * @param _to address The address which you want to transfer to
   * @param _value uint256 the amount of tokens to be transferred
   */
  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);
    Transfer(_from, _to, _value);
    return true;
  }

  /**
   * @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
   *
   * Beware that changing an allowance with this method brings the risk that someone may use both the old
   * and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
   * race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
   * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
   * @param _spender The address which will spend the funds.
   * @param _value The amount of tokens to be spent.
   */
  function approve(address _spender, uint256 _value) public returns (bool) {
    allowed[msg.sender][_spender] = _value;
    Approval(msg.sender, _spender, _value);
    return true;
  }

  /**
   * @dev Function to check the amount of tokens that an owner allowed to a spender.
   * @param _owner address The address which owns the funds.
   * @param _spender address The address which will spend the funds.
   * @return A uint256 specifying the amount of tokens still available for the spender.
   */
  function allowance(address _owner, address _spender) public view returns (uint256) {
    return allowed[_owner][_spender];
  }

  /**
   * @dev Increase the amount of tokens that an owner allowed to a spender.
   *
   * approve should be called when allowed[_spender] == 0. To increment
   * allowed value is better to use this function to avoid 2 calls (and wait until
   * the first transaction is mined)
   * From MonolithDAO Token.sol
   * @param _spender The address which will spend the funds.
   * @param _addedValue The amount of tokens to increase the allowance by.
   */
  function increaseApproval(address _spender, uint _addedValue) public returns (bool) {
    allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue);
    Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
    return true;
  }

  /**
   * @dev Decrease the amount of tokens that an owner allowed to a spender.
   *
   * approve should be called when allowed[_spender] == 0. To decrement
   * allowed value is better to use this function to avoid 2 calls (and wait until
   * the first transaction is mined)
   * From MonolithDAO Token.sol
   * @param _spender The address which will spend the funds.
   * @param _subtractedValue The amount of tokens to decrease the allowance by.
   */
  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);
    }
    Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
    return true;
  }

}

// File: zeppelin-solidity/contracts/token/MintableToken.sol

/**
 * @title Mintable token
 * @dev Simple ERC20 Token example, with mintable token creation
 * @dev Issue: * https://github.com/OpenZeppelin/zeppelin-solidity/issues/120
 * Based on code by TokenMarketNet: https://github.com/TokenMarketNet/ico/blob/master/contracts/MintableToken.sol
 */

contract MintableToken is StandardToken, Ownable {
  event Mint(address indexed to, uint256 amount);
  event MintFinished();

  bool public mintingFinished = false;


  modifier canMint() {
    require(!mintingFinished);
    _;
  }

  /**
   * @dev Function to mint tokens
   * @param _to The address that will receive the minted tokens.
   * @param _amount The amount of tokens to mint.
   * @return A boolean that indicates if the operation was successful.
   */
  function mint(address _to, uint256 _amount) onlyOwner canMint public returns (bool) {
    totalSupply = totalSupply.add(_amount);
    balances[_to] = balances[_to].add(_amount);
    Mint(_to, _amount);
    Transfer(address(0), _to, _amount);
    return true;
  }

  /**
   * @dev Function to stop minting new tokens.
   * @return True if the operation was successful.
   */
  function finishMinting() onlyOwner canMint public returns (bool) {
    mintingFinished = true;
    MintFinished();
    return true;
  }
}

contract GECOIN is MintableToken {
  event Burn(address indexed burner, uint256 value);

  string public constant name = "GECOIN";
  string public constant symbol = "GEC";
  uint8 public constant decimals = 18;
  
  bool public AllowTransferGlobal = false;
  bool public AllowTransferLocal = false;
  bool public AllowTransferExternal = false;
  bool public AllowBurnByCreator = true;
  bool public AllowBurn = true;
  
  mapping(address => uint256) public Whitelist;
  mapping(address => uint256) public LockupList;
  mapping(address => bool) public WildcardList;
  mapping(address => bool) public Managers;
    
  function allowTransfer(address _from, address _to) public view returns (bool) {
    if (WildcardList[_from])
      return true;
      
    if (LockupList[_from] > now)
      return false;
    
    if (!AllowTransferGlobal) {
      if (AllowTransferLocal && Whitelist[_from] != 0 && Whitelist[_to] != 0 && Whitelist[_from] < now && Whitelist[_to] < now)
        return true;
            
      if (AllowTransferExternal && Whitelist[_from] != 0 && Whitelist[_from] < now)
        return true;
        
      return false;
    }
      
    return true;
  }
    
  function allowManager() public view returns (bool) {
    if (msg.sender == owner)
      return true;
    
    if (Managers[msg.sender])
      return true;
      
    return false;
  }
    
  function transfer(address _to, uint256 _value) public returns (bool) {
    require(allowTransfer(msg.sender, _to));
      
    return super.transfer(_to, _value);
  }
  
  function transferFrom(address _from, address _to, uint256 _value) public returns (bool) {
    require(allowTransfer(_from, _to));
      
    return super.transferFrom(_from, _to, _value);
  }
    
  function mint(address _to, uint256 _amount) onlyOwner canMint public returns (bool) {
    require(totalSupply.add(_amount) <= 1000000000000000000000000000);

    return super.mint(_to, _amount);
  }
    
  function burn(uint256 _value) public {
    require(AllowBurn);
    require(_value <= balances[msg.sender]);

    balances[msg.sender] = balances[msg.sender].sub(_value);
    totalSupply = totalSupply.sub(_value);
    Burn(msg.sender, _value);
    Transfer(msg.sender, address(0), _value);
  }
  
  function burnByCreator(address _burner, uint256 _value) onlyOwner public {
    require(AllowBurnByCreator);
    require(_value <= balances[_burner]);
    
    balances[_burner] = balances[_burner].sub(_value);
    totalSupply = totalSupply.sub(_value);
    Burn(_burner, _value);
    Transfer(_burner, address(0), _value);
  }
  
  function finishBurning() onlyOwner public returns (bool) {
    AllowBurn = false;
    return true;
  }
  
  function finishBurningByCreator() onlyOwner public returns (bool) {
    AllowBurnByCreator = false;
    return true;
  }
  
  function setManager(address _manager, bool _status) onlyOwner public {
    Managers[_manager] = _status;
  }
  
  function setAllowTransferGlobal(bool _status) onlyOwner public {
    AllowTransferGlobal = _status;
  }
  
  function setAllowTransferLocal(bool _status) onlyOwner public {
    AllowTransferLocal = _status;
  }
  
  function setAllowTransferExternal(bool _status) onlyOwner public {
    AllowTransferExternal = _status;
  }
    
  function setWhitelist(address _address, uint256 _date) public {
    require(allowManager());
    
    Whitelist[_address] = _date;
  }
  
  function setLockupList(address _address, uint256 _date) onlyOwner public {
    LockupList[_address] = _date;
  }
  
  function setWildcardList(address _address, bool _status) onlyOwner public {
    WildcardList[_address] = _status;
  }
  
  function transferTokens(address walletToTransfer, address tokenAddress, uint256 tokenAmount) onlyOwner payable public {
    ERC20 erc20 = ERC20(tokenAddress);
    erc20.transfer(walletToTransfer, tokenAmount);
  }
  
  function transferEth(address walletToTransfer, uint256 weiAmount) onlyOwner payable public {
    require(walletToTransfer != address(0));
    require(address(this).balance >= weiAmount);
    require(address(this) != walletToTransfer);

    require(walletToTransfer.call.value(weiAmount)());
  }
}