Contract Name:
GNCCrowdsale
Contract Source Code:
File 1 of 1 : GNCCrowdsale
pragma solidity ^0.4.25;
library SafeMath {
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a * b;
assert(a == 0 || 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;
}
function max64(uint64 a, uint64 b) internal pure returns (uint64) {
return a >= b ? a : b;
}
function min64(uint64 a, uint64 b) internal pure returns (uint64) {
return a < b ? a : b;
}
function max256(uint256 a, uint256 b) internal pure returns (uint256) {
return a >= b ? a : b;
}
function min256(uint256 a, uint256 b) internal pure returns (uint256) {
return a < b ? a : b;
}
}
contract ERC20Basic {
uint256 public totalSupply;
bool public transfersEnabled;
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);
}
contract ERC20 {
uint256 public totalSupply;
bool public transfersEnabled;
function balanceOf(address _owner) public constant returns (uint256 balance);
function transfer(address _to, uint256 _value) public returns (bool success);
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success);
function approve(address _spender, uint256 _value) public returns (bool success);
function allowance(address _owner, address _spender) public constant returns (uint256 remaining);
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
}
contract BasicToken is ERC20Basic {
using SafeMath for uint256;
uint8 decimals = 18;
address public addressFundTeam = 0xCE4B70066331aF47CBF6b4AA4Fb85B0F3E598Ae8;
address public addressFundAdvisors = 0x4386a80917A6367153880C9ee6EC361c660a64EC;
uint256 public fundTeam = 75 * 10**5 * (10 ** uint256(decimals));
uint256 public fundAdvisors = 45 * 10**5 * (10 ** uint256(decimals));
uint256 endTimeIco = 1552694399; // Fri, 15 Mar 2019 23:59:59 GMT
mapping (address => uint256) balances;
/**
* Protection against short address attack
*/
modifier onlyPayloadSize(uint numwords) {
assert(msg.data.length == numwords * 32 + 4);
_;
}
/**
* @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 onlyPayloadSize(2) returns (bool) {
require(_to != address(0));
require(_value <= balances[msg.sender]);
require(transfersEnabled);
if (msg.sender == addressFundTeam) {
require(checkVesting(_value, now) > 0);
}
if (msg.sender == addressFundAdvisors) {
require(now > (endTimeIco + 26 weeks));
}
// SafeMath.sub will throw if there is not enough balance.
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
function checkVesting(uint256 _value, uint256 _currentTime) public view returns(uint8 period) {
period = 0;
if ( (endTimeIco + 26 weeks) <= _currentTime && _currentTime < (endTimeIco + 52 weeks) ) {
period = 1;
require(balances[addressFundTeam].sub(_value) >= fundTeam.mul(75).div(100));
}
if ( (endTimeIco + 52 weeks) <= _currentTime && _currentTime < (endTimeIco + 78 weeks) ) {
period = 2;
require(balances[addressFundTeam].sub(_value) >= fundTeam.mul(50).div(100));
}
if ( (endTimeIco + 78 weeks) <= _currentTime && _currentTime < (endTimeIco + 104 weeks) ) {
period = 3;
require(balances[addressFundTeam].sub(_value) >= fundTeam.mul(25).div(100));
}
if ( (endTimeIco + 104 weeks) <= _currentTime ) {
period = 4;
require(balances[addressFundTeam].sub(_value) >= 0);
}
}
/**
* @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];
}
}
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 onlyPayloadSize(3) returns (bool) {
require(_to != address(0));
require(_value <= balances[_from]);
require(_value <= allowed[_from][msg.sender]);
require(transfersEnabled);
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
emit 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;
emit 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 onlyPayloadSize(2) constant returns (uint256 remaining) {
return allowed[_owner][_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
*/
function increaseApproval(address _spender, uint _addedValue) public returns (bool success) {
allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue);
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
function decreaseApproval(address _spender, uint _subtractedValue) public returns (bool success) {
uint oldValue = allowed[msg.sender][_spender];
if (_subtractedValue > oldValue) {
allowed[msg.sender][_spender] = 0;
}
else {
allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);
}
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
}
/**
* @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;
address public ownerTwo;
event OwnerChanged(address indexed previousOwner, address indexed newOwner);
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner || msg.sender == ownerTwo);
_;
}
/**
* @dev Allows the current owner to transfer control of the contract to a newOwner.
* @param _newOwner The address to transfer ownership to.
*/
function changeOwner(address _newOwner) onlyOwner internal {
require(_newOwner != address(0));
emit OwnerChanged(owner, _newOwner);
owner = _newOwner;
}
}
/**
* @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 {
string public constant name = "Greencoin";
string public constant symbol = "GNC";
uint8 public constant decimals = 18;
mapping(uint8 => uint8) public approveOwner;
event Mint(address indexed to, uint256 amount);
event MintFinished();
bool public mintingFinished;
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, address _owner) canMint internal returns (bool) {
balances[_to] = balances[_to].add(_amount);
balances[_owner] = balances[_owner].sub(_amount);
emit Mint(_to, _amount);
emit Transfer(_owner, _to, _amount);
return true;
}
/**
* Peterson's Law Protection
* Claim tokens
*/
function claimTokens(address _token) public onlyOwner {
if (checkApprove(0) == false) {
revert(); // for test's
}
if (_token == 0x0) {
owner.transfer(address(this).balance);
return;
}
MintableToken token = MintableToken(_token);
uint256 balance = token.balanceOf(this);
token.transfer(owner, balance);
emit Transfer(_token, owner, balance);
}
function checkApprove(uint8 _numberFunction) public onlyOwner returns (bool) {
uint8 countApprove = approveOwner[_numberFunction];
if (msg.sender == owner && (countApprove == 0 || countApprove == 2) ) {
approveOwner[_numberFunction] += 1;
}
if (msg.sender == ownerTwo && (countApprove == 0 || countApprove == 1) ) {
approveOwner[_numberFunction] += 2;
}
if (approveOwner[_numberFunction] == 3) {
approveOwner[_numberFunction] == 0;
return true;
} else {
return false;
}
}
}
/**
* @title Crowdsale
* @dev Crowdsale is a base contract for managing a token crowdsale.
* Crowdsales have a start and end timestamps, where investors can make
* token purchases. Funds collected are forwarded to a wallet
* as they arrive.
*/
contract Crowdsale is Ownable {
using SafeMath for uint256;
// address where funds are collected
address public wallet;
// amount of raised money in wei
uint256 public weiRaised;
uint256 public tokenAllocated;
constructor(address _wallet) public {
require(_wallet != address(0));
wallet = _wallet;
}
}
contract GNCCrowdsale is Ownable, Crowdsale, MintableToken {
using SafeMath for uint256;
/**
* Price: 1 ETH = 500 token
*
* 1 Stage 1 ETH = 575 token -- discount 15%
* 2 Stage 1 ETH = 550 token -- discount 10%
* 3 Stage 1 ETH = 525 token -- discount 5%
* 4 Stage 1 ETH = 500 token -- discount 0%
*
*/
uint256[] public rates = [575, 550, 525, 500];
uint256 public weiMin = 0.1 ether;
mapping (address => uint256) public deposited;
mapping (address => bool) public whitelist;
mapping (address => bool) internal isRefferer;
uint256 public constant INITIAL_SUPPLY = 5 * 10**7 * (10 ** uint256(decimals));
uint256 public fundForSale = 3 * 10**7 * (10 ** uint256(decimals));
address public addressFundReserv = 0x0B55283caD0cc5372E4D33aD6D3260D8050EccD4;
address public addressFundBounty = 0xfe17aa1cf299038780b8B16F0B89DB8cEcF28a89;
uint256 public fundReserv = 75 * 10**5 * (10 ** uint256(decimals));
uint256 public fundBounty = 5 * 10**5 * (10 ** uint256(decimals));
uint256 limitPreIco = 6 * 10**6 * (10 ** uint256(decimals));
uint256 startTimePreIco = 1542326400; // Fri, 16 Nov 2018 00:00:00 GMT
uint256 endTimePreIco = 1544918399; // Sat, 15 Dec 2018 23:59:59 GMT
uint256 startTimeIcoStage1 = 1547510400; // Tue, 15 Jan 2019 00:00:00 GMT
uint256 endTimeIcoStage1 = 1548806399; // Tue, 29 Jan 2019 23:59:59 GMT
uint256 startTimeIcoStage2 = 1548806400; // Wed, 30 Jan 2019 00:00:00 GMT
uint256 endTimeIcoStage2 = 1550102399; // Wed, 13 Feb 2019 23:59:59 GMT
uint256 startTimeIcoStage3 = 1550102400; // Thu, 14 Feb 2019 00:00:00 GMT
uint256 endTimeIcoStage3 = 1552694399; // Fri, 15 Mar 2019 23:59:59 GMT
uint256 public countInvestor;
event TokenPurchase(address indexed beneficiary, uint256 value, uint256 amount);
event TokenLimitReached(address indexed sender, uint256 tokenRaised, uint256 purchasedToken);
event MinWeiLimitReached(address indexed sender, uint256 weiAmount);
event CurrentPeriod(uint period);
event ChangeAddressWallet(address indexed owner, address indexed newAddress, address indexed oldAddress);
event ChangeRate(address indexed owner, uint256 newValue, uint256 oldValue);
constructor(address _owner, address _wallet) public
Crowdsale(_wallet)
{
require(_owner != address(0));
owner = _owner;
ownerTwo = addressFundReserv;
//owner = msg.sender; // for test's
transfersEnabled = true;
mintingFinished = false;
totalSupply = INITIAL_SUPPLY;
bool resultMintForOwner = mintForFund(owner);
require(resultMintForOwner);
}
// fallback function can be used to buy tokens
function() payable public {
buyTokens(msg.sender);
}
function buyTokens(address _investor) public payable returns (uint256){
require(_investor != address(0));
uint256 weiAmount = msg.value;
uint256 tokens = validPurchaseTokens(weiAmount);
if (tokens == 0) {revert();}
weiRaised = weiRaised.add(weiAmount);
tokenAllocated = tokenAllocated.add(tokens);
mint(_investor, tokens, owner);
emit TokenPurchase(_investor, weiAmount, tokens);
if (deposited[_investor] == 0) {
countInvestor = countInvestor.add(1);
}
deposit(_investor);
wallet.transfer(weiAmount);
return tokens;
}
function getTotalAmountOfTokens(uint256 _weiAmount) internal returns (uint256) {
uint256 currentDate = now;
//currentDate = 1543658400; // (01 Dec 2018) // for test's
uint currentPeriod = 0;
currentPeriod = getPeriod(currentDate);
uint256 amountOfTokens = 0;
if(currentPeriod > 0){
if(currentPeriod == 1){
amountOfTokens += _weiAmount.mul(rates[0]);
if (tokenAllocated.add(amountOfTokens) > limitPreIco) {
currentPeriod = currentPeriod.add(1);
}
}
if(currentPeriod >= 2){
amountOfTokens += _weiAmount.mul(rates[currentPeriod - 1]);
}
if(whitelist[msg.sender]){
amountOfTokens = amountOfTokens.mul(105).div(100);
}
}
emit CurrentPeriod(currentPeriod);
return amountOfTokens;
}
function getPeriod(uint256 _currentDate) public view returns (uint) {
if(_currentDate < startTimePreIco){
return 0;
}
if( startTimePreIco <= _currentDate && _currentDate <= endTimePreIco){
return 1;
}
if( startTimeIcoStage1 <= _currentDate && _currentDate <= endTimeIcoStage1){
return 2;
}
if( startTimeIcoStage2 <= _currentDate && _currentDate <= endTimeIcoStage2){
return 3;
}
if( startTimeIcoStage3 <= _currentDate && _currentDate <= endTimeIcoStage3){
return 4;
}
return 0;
}
function deposit(address investor) internal {
deposited[investor] = deposited[investor].add(msg.value);
}
function mintForFund(address _walletOwner) internal returns (bool result) {
result = false;
require(_walletOwner != address(0));
balances[_walletOwner] = balances[_walletOwner].add(fundForSale);
balances[addressFundTeam] = balances[addressFundTeam].add(fundTeam);
balances[addressFundReserv] = balances[addressFundReserv].add(fundReserv);
balances[addressFundAdvisors] = balances[addressFundAdvisors].add(fundAdvisors);
balances[addressFundBounty] = balances[addressFundBounty].add(fundBounty);
result = true;
}
function getDeposited(address _investor) external view returns (uint256){
return deposited[_investor];
}
function setWallet(address _newWallet) external onlyOwner {
if (checkApprove(1) == false) {
revert();
}
require(_newWallet != address(0));
address _oldWallet = wallet;
wallet = _newWallet;
emit ChangeAddressWallet(msg.sender, _newWallet, _oldWallet);
}
function validPurchaseTokens(uint256 _weiAmount) public returns (uint256) {
uint256 addTokens = getTotalAmountOfTokens(_weiAmount);
if (_weiAmount < weiMin) {
emit MinWeiLimitReached(msg.sender, _weiAmount);
return 0;
}
if (tokenAllocated.add(addTokens) > fundForSale) {
emit TokenLimitReached(msg.sender, tokenAllocated, addTokens);
return 0;
}
return addTokens;
}
function getRefferalProfit(address _refferer) external {
uint256 balanceRefferal = balances[msg.sender];
require(_refferer != address(0));
require(balanceRefferal > 0);
require(balances[_refferer] > 0);
if (isRefferer[msg.sender] == false) {
isRefferer[msg.sender] = true;
balances[msg.sender] = balanceRefferal.mul(105).div(100);
}
}
function setWeiMin(uint256 _value) external onlyOwner {
if (checkApprove(2) == false) {
revert();
}
require(_value > 0);
weiMin = _value;
}
/**
* @dev Adds single address to whitelist.
* @param _beneficiary Address to be added to the whitelist
*/
function addToWhitelist(address _beneficiary) external onlyOwner {
require(_beneficiary != address(0));
whitelist[_beneficiary] = true;
}
/**
* @dev Adds list of addresses to whitelist. Not overloaded due to limitations with truffle testing.
* @param _beneficiaries Addresses to be added to the whitelist
*/
function addManyToWhitelist(address[] _beneficiaries) external onlyOwner {
for (uint256 i = 0; i < _beneficiaries.length; i++) {
whitelist[_beneficiaries[i]] = true;
}
}
/**
* @dev Removes single address from whitelist.
* @param _beneficiary Address to be removed to the whitelist
*/
function removeFromWhitelist(address _beneficiary) external onlyOwner {
require(_beneficiary != address(0));
whitelist[_beneficiary] = false;
}
}