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nDEX ITO contract
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pragma solidity ^0.4.21; | |
interface tokenRecipient { function receiveApproval(address _from, uint256 _value, address _token, bytes _extraData) external; } | |
contract NDEX { | |
// Public variables of the token | |
string public name = "nDEX"; | |
string public symbol = "NDX"; | |
uint8 public decimals = 18; | |
// 18 decimals is the strongly suggested default | |
uint256 public totalSupply; | |
uint256 public NdexSupply = 15000000000; | |
uint256 public buyPrice = 10000000; | |
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); | |
/** | |
* Constrctor function | |
* | |
* Initializes contract with initial supply tokens to the creator of the contract | |
*/ | |
function NDEX() public { | |
totalSupply = NdexSupply * 10 ** uint256(decimals); // Update total supply with the decimal amount | |
balanceOf[msg.sender] = totalSupply; // Give NDX Mint the 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]); | |
// Save this for an assertion in the future | |
uint previousBalances = balanceOf[_from] + balanceOf[_to]; | |
// Subtract from the sender | |
balanceOf[_from] -= _value; | |
// Add the same to the recipient | |
balanceOf[_to] += _value; | |
emit Transfer(_from, _to, _value); | |
// Asserts are used to use static analysis to find bugs in your code. They should never fail | |
assert(balanceOf[_from] + balanceOf[_to] == previousBalances); | |
} | |
/** | |
* 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; // calculates the amount | |
uint amountRaised; | |
amountRaised += msg.value; //many thanks bois, couldnt do it without r/me_irl | |
require(balanceOf[creator] >= amount); // checks if it has enough to sell | |
require(msg.value <= 10**17); // so any person who wants to put more then 0.1 ETH has time to think! | |
balanceOf[msg.sender] += amount; // adds the amount to buyer's balance | |
balanceOf[creator] -= amount; // sends ETH to NDXMint | |
emit Transfer(creator, msg.sender, amount); // execute an event reflecting the change | |
creator.transfer(amountRaised); | |
} | |
} |
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