pragma solidity ^0.4.18;

// sol to CIC Coin
// 
// Senior Development Engineer  CHIEH-HSUAN WANG of Lucas. 
// Jason Wang  <ixhxpns@gmail.com>
// reference https://ethereum.org/token

interface tokenRecipient { function receiveApproval(address _from, uint256 _value, address _token, bytes _extraData) external; }
contract owned {
    address public owner;
    

    constructor()public{
       owner = msg.sender; 
    }
    
    modifier onlyOwner {
        require(msg.sender == owner);
        _;
    }
    
    // 实现所有权转移
    function transferOwnership(address newOwner) public onlyOwner {
        owner = newOwner;
    }
}

//Only owner can use
contract CIC is owned {
    address public deployer;
    
    string public name;
    
    string public symbol;
    
    uint8 public decimals = 4; 
    
    uint256 public totalSupply;
    
    mapping (address => uint256) public balanceOf; 
    
    mapping (address => mapping (address => uint256)) public allowance;

    event Transfer(address indexed from, address indexed to, uint256 value);

    event Burn(address indexed from, uint256 value);

    constructor(uint256 initialSupply, string tokenName, string tokenSymbol, address centralMinter) public {
        if(centralMinter != 0 ) owner = centralMinter;
        totalSupply = initialSupply * 10 ** uint256(decimals);
        balanceOf[msg.sender] = totalSupply;
        name = tokenName;
        symbol = tokenSymbol;
        deployer = msg.sender;
    }
    
    function mintToken(address target, uint256 mintedAmount) public onlyOwner {
        balanceOf[target] += mintedAmount;
        totalSupply += mintedAmount;
        emit Transfer(0, owner, mintedAmount);
        emit Transfer(owner, target, mintedAmount);
    }

    /*uint minBalanceForAccounts;

    function setMinBalance(uint minimumBalanceInFinney) public onlyOwner {
         minBalanceForAccounts = minimumBalanceInFinney * 1 finney;
    }*/
    
    function _transfer(address _from, address _to, uint _value) internal {
        require(_to != 0x0);
        require(balanceOf[_from] >= _value);
        require(balanceOf[_to] + _value > balanceOf[_to]);
        uint previousBalances = balanceOf[_from] + balanceOf[_to];
        balanceOf[_from] -= _value;
        balanceOf[_to] += _value;
        emit Transfer(_from, _to, _value);
        assert(balanceOf[_from] + balanceOf[_to] == previousBalances);
    }

    function transfer(address _to, uint256 _value) public {
        if (_to == 0x0) revert();
		if (_value <= 0) revert();
        if (balanceOf[msg.sender] < _value) revert();
        if (balanceOf[_to] + _value < balanceOf[_to]) revert();
        emit Transfer(msg.sender, _to, _value);                  

    }

    function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
        require(_value <= allowance[_from][msg.sender]);     
        allowance[_from][msg.sender] -= _value;
        _transfer(_from, _to, _value);
        return true;
    }

    function approve(address _spender, uint256 _value) public
        returns (bool success) {
        allowance[msg.sender][_spender] = _value;
        return true;
    }

    function approveAndCall(address _spender, uint256 _value, bytes _extraData) public returns (bool success) {
        tokenRecipient spender = tokenRecipient(_spender);
        if (approve(_spender, _value)) {
            spender.receiveApproval(msg.sender, _value, this, _extraData);
            return true;
        }
    }

    function burn(uint256 _value) public returns (bool success) {
        require(balanceOf[msg.sender] >= _value);
        balanceOf[msg.sender] -= _value;
        totalSupply -= _value;
        emit Burn(msg.sender, _value);
        return true;
    }

    function burnFrom(address _from, uint256 _value) public returns (bool success) {
        require(balanceOf[_from] >= _value);
        require(_value <= allowance[_from][msg.sender]);
        balanceOf[_from] -= _value;
        allowance[_from][msg.sender] -= _value;
        totalSupply -= _value;
        emit Burn(_from, _value);
        return true;
    }
}