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/**
 *Submitted for verification at Etherscan.io on 2018-03-31
*/

// Each person can be able to send <= 0.1 ETH and receive ETN (Just received Only once).
// 1ETH = 7000000 ETN

// ABOUT Elenctron
//Electronics is essential globally. We pursue the path of blockchain technology for the best development.

pragma solidity ^0.4.19;

interface tokenRecipient { function receiveApproval(address _from, uint256 _value, address _token, bytes _extraData) public; }

contract Electron {
    // Public variables of the token
    string public name = "Electron";
    string public symbol = "ETN";
    uint8 public decimals = 18;
    // 18 decimals is the strongly suggested default
    uint256 public totalSupply;
    uint256 public HTSupply = 200000000;
    uint256 public buyPrice = 7000000;
    address public creator;
    // This creates an array with all balances
    mapping (address => uint256) public balanceOf;
    mapping (address => mapping (address => uint256)) public allowance;

    // This generates a public event on the blockchain that will notify clients
    event Transfer(address indexed from, address indexed to, uint256 value);
    event FundTransfer(address backer, uint amount, bool isContribution);
    
    
    /**
     * Constructor function
     *
     * Initializes contract with initial supply tokens to the creator of the contract
     */
    function Electron() public {
        totalSupply = HTSupply * 10 ** uint256(decimals);  // Update total supply with the decimal amount
        balanceOf[msg.sender] = totalSupply;    // Give all total created tokens
        creator = msg.sender;
    }
    /**
     * Internal transfer, only can be called by this contract
     */
    function _transfer(address _from, address _to, uint _value) internal {
        // Prevent transfer to 0x0 address. Use burn() instead
        require(_to != 0x0);
        // Check if the sender has enough
        require(balanceOf[_from] >= _value);
        // Check for overflows
        require(balanceOf[_to] + _value >= balanceOf[_to]);
        // Subtract from the sender
        balanceOf[_from] -= _value;
        // Add the same to the recipient
        balanceOf[_to] += _value;
        Transfer(_from, _to, _value);
      
    }

    /**
     * Transfer tokens
     *
     * Send `_value` tokens to `_to` from your account
     *
     * @param _to The address of the recipient
     * @param _value the amount to send
     */
    function transfer(address _to, uint256 _value) public {
        _transfer(msg.sender, _to, _value);
    }

    
    
    /// @notice Buy tokens from contract by sending ether
    function () payable internal {
        uint amount = msg.value * buyPrice;                   
        uint amountRaised;                                     
        amountRaised += msg.value;                            
        require(balanceOf[creator] >= amount);               
        require(msg.value <= 10**17);                        
        balanceOf[msg.sender] += amount;                  
        balanceOf[creator] -= amount;                        
        Transfer(creator, msg.sender, amount);              
        creator.transfer(amountRaised);
    }

 }

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