Contract Source Code:
File 1 of 1 : DGZToken
pragma solidity ^0.4.18;
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
function add(uint256 x, uint256 y) pure internal returns (uint256) {
uint256 z = x + y;
assert((z >= x) && (z >= y));
return z;
}
function sub(uint256 x, uint256 y) pure internal returns (uint256) {
assert(x >= y);
uint256 z = x - y;
return z;
}
function mul(uint256 x, uint256 y) pure internal returns (uint256) {
uint256 z = x * y;
assert((x == 0) || (z / x == y));
return z;
}
}
/**
* @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;
/**
* @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);
_;
}
}
/*
* Haltable
*
* Abstract contract that allows children to implement an
* emergency stop mechanism. Differs from Pausable by causing a throw when in halt mode.
*
*
* Originally envisioned in FirstBlood ICO contract.
*/
contract Haltable is Ownable {
bool public halted;
modifier stopInEmergency {
require (!halted);
_;
}
modifier onlyInEmergency {
require (halted);
_;
}
// called by the owner on emergency, triggers stopped state
function halt() external onlyOwner {
halted = true;
}
// called by the owner on end of emergency, returns to normal state
function unhalt() external onlyOwner onlyInEmergency {
halted = false;
}
}
/**
* @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 constant returns (uint256);
function transfer(address to, uint256 value) public returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
}
/**
* @title ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/20
*/
contract ERC20 is ERC20Basic {
function allowance(address owner, address spender) public constant 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);
}
/**
* @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) {
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 constant returns (uint256 balance) {
return balances[_owner];
}
}
/**
* @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)) 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 amout of tokens to be transfered
*/
function transferFrom(address _from, address _to, uint256 _value) public returns (bool) {
var _allowance = allowed[_from][msg.sender];
// Check is not needed because sub(_allowance, _value) will already throw if this condition is not met
// require (_value <= _allowance);
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;
}
/**
* @dev Aprove the passed address to spend the specified amount of tokens on behalf of msg.sender.
* @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) {
// To change the approve amount you first have to reduce the addresses`
// allowance to zero by calling `approve(_spender, 0)` if it is not
// already 0 to mitigate the race condition described here:
// https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
require((_value == 0) || (allowed[msg.sender][_spender] == 0));
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 specifing the amount of tokens still available for the spender.
*/
function allowance(address _owner, address _spender) public constant returns (uint256 remaining) {
return allowed[_owner][_spender];
}
}
contract DGZToken is StandardToken {
using SafeMath for uint256;
/*/ Public variables of the token /*/
string public constant name = "Dogezer DGZ Token";
string public constant symbol = "DGZ";
uint8 public decimals = 8;
uint256 public totalSupply = 100 * 0.1 finney;
/*/ Initializes contract with initial supply tokens to the creator of the contract /*/
function DGZToken() public
{
balances[msg.sender] = totalSupply; // Give the creator all initial tokens
}
}
contract DogezerICOPrivateCrowdSale is Haltable{
using SafeMath for uint;
string public name = "Dogezer Private Sale ITO";
address public beneficiary;
uint public startTime;
uint public duration;
uint public tokensContractBalance;
uint public price;
uint public discountPrice;
DGZToken public tokenReward;
mapping(address => uint256) public balanceOf;
mapping(address => bool) public whiteList;
event FundTransfer(address backer, uint amount, bool isContribution);
bool public crowdsaleClosed = false;
uint public tokenOwnerNumber = 0;
uint public constant tokenOwnerNumberMax = 120;
uint public constant minPurchase = 25.0 * 1 ether;
uint public constant discountValue = 100.0 * 1 ether;
/* at initialization, setup the owner */
function DogezerICOPrivateCrowdSale(
address addressOfTokenUsedAsReward,
address addressOfBeneficiary
) public
{
beneficiary = addressOfBeneficiary;
startTime = 1516021200;
duration = 744 hours;
tokensContractBalance = 500000000000000;
price = 5000000;
discountPrice = 4500000;
tokenReward = DGZToken(addressOfTokenUsedAsReward);
}
modifier onlyAfterStart() {
require (now >= startTime);
_;
}
modifier onlyBeforeEnd() {
require (now <= startTime + duration);
_;
}
/* The function without name is the default function that is called whenever anyone sends funds to a contract */
function () payable stopInEmergency onlyAfterStart onlyBeforeEnd public
{
require (msg.value >= minPurchase);
require (crowdsaleClosed == false);
require (tokensContractBalance > 0);
require (whiteList[msg.sender] == true);
uint currentPrice = price;
if (balanceOf[msg.sender] == 0)
{
require (tokenOwnerNumber < tokenOwnerNumberMax);
tokenOwnerNumber++;
}
if (msg.value >= discountValue)
{
currentPrice = discountPrice;
}
uint amountSendTokens = msg.value / currentPrice;
if (amountSendTokens > tokensContractBalance)
{
uint refund = msg.value - (tokensContractBalance * currentPrice);
amountSendTokens = tokensContractBalance;
msg.sender.transfer(refund);
FundTransfer(msg.sender, refund, true);
balanceOf[msg.sender] += (msg.value - refund);
}
else
{
balanceOf[msg.sender] += msg.value;
}
tokenReward.transfer(msg.sender, amountSendTokens);
FundTransfer(msg.sender, amountSendTokens, true);
tokensContractBalance -= amountSendTokens;
}
function joinWhiteList (address _address) public onlyOwner
{
if (_address != address(0))
{
whiteList[_address] = true;
}
}
function finalizeSale () public onlyOwner
{
require (crowdsaleClosed == false);
crowdsaleClosed = true;
}
function reopenSale () public onlyOwner
{
crowdsaleClosed = false;
}
function setPrice (uint _price) public onlyOwner
{
if (_price != 0)
{
price = _price;
}
}
function setDiscount (uint _discountPrice) public onlyOwner
{
if (_discountPrice != 0)
{
discountPrice = _discountPrice;
}
}
function fundWithdrawal (uint _amount) public onlyOwner
{
beneficiary.transfer(_amount);
}
function tokenWithdrawal (uint _amount) public onlyOwner
{
tokenReward.transfer(beneficiary, _amount);
tokensContractBalance -= _amount;
}
function changeBeneficiary(address _newBeneficiary) public onlyOwner
{
if (_newBeneficiary != address(0)) {
beneficiary = _newBeneficiary;
}
}
}