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pragma solidity ^0.4.23;
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
/**
* @dev Multiplies two numbers, throws on overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256 c) {
if (a == 0) {
return 0;
}
c = a * b;
assert(c / a == b);
return c;
}
/**
* @dev Integer division of two numbers, truncating the quotient.
*/
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 a / b;
}
/**
* @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
/**
* @dev Adds two numbers, throws on overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256 c) {
c = a + b;
assert(c >= a);
return c;
}
}
/**
* @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;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @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);
_;
}
/**
* @dev Allows the current owner to transfer control of the contract to a newOwner.
* @param newOwner The address to transfer ownership to.
*/
function transferOwnership(address newOwner) public onlyOwner {
require(newOwner != address(0));
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
}
/**
* @title ERC20Basic
* @dev Simpler version of ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/179
*/
contract ERC20Basic {
function totalSupply() public view returns (uint256);
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);
}
/**
* @title ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/20
*/
contract ERC20 is ERC20Basic {
function allowance(address owner, address spender) public view 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, Ownable {
using SafeMath for uint256;
mapping(address => uint256) balances;
uint256 totalSupply_;
/**
* @dev total number of tokens in existence
*/
function totalSupply() public view returns (uint256) {
return totalSupply_;
}
/**
* @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) {
require(_to != address(0));
require(_value <= balances[msg.sender]);
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit 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 view returns (uint256) {
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)) 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 returns (bool) {
require(_to != address(0));
require(_value <= balances[_from]);
require(_value <= allowed[_from][msg.sender]);
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 view returns (uint256) {
return allowed[_owner][_spender];
}
/**
* @dev Increase the amount of tokens that an owner allowed to a 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
* @param _spender The address which will spend the funds.
* @param _addedValue The amount of tokens to increase the allowance by.
*/
function increaseApproval(address _spender, uint _addedValue) public returns (bool) {
allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue);
emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
/**
* @dev Decrease the amount of tokens that an owner allowed to a spender.
*
* approve should be called when allowed[_spender] == 0. To decrement
* allowed value is better to use this function to avoid 2 calls (and wait until
* the first transaction is mined)
* From MonolithDAO Token.sol
* @param _spender The address which will spend the funds.
* @param _subtractedValue The amount of tokens to decrease the allowance by.
*/
function decreaseApproval(address _spender, uint _subtractedValue) public returns (bool) {
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 Mintable token
* @dev Simple ERC20 Token example, with mintable token creation
* @dev Issue: * https://github.com/OpenZeppelin/openzeppelin-solidity/issues/120
* Based on code by TokenMarketNet: https://github.com/TokenMarketNet/ico/blob/master/contracts/MintableToken.sol
*/
contract MintableToken is StandardToken {
event Mint(address indexed to, uint256 amount);
event MintFinished();
bool public mintingFinished = false;
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) onlyOwner canMint public returns (bool) {
totalSupply_ = totalSupply_.add(_amount);
balances[_to] = balances[_to].add(_amount);
emit Mint(_to, _amount);
emit Transfer(address(0), _to, _amount);
return true;
}
/**
* @dev Function to stop minting new tokens.
* @return True if the operation was successful.
*/
function finishMinting() onlyOwner canMint public returns (bool) {
mintingFinished = true;
emit MintFinished();
return true;
}
}
contract LTE is Ownable, MintableToken {
using SafeMath for uint256;
string public constant name = "LTE";
string public constant symbol = "LTE";
uint32 public constant decimals = 18;
address public addressBounty;
address public addressAirdrop;
address public addressTeam;
address public addressAdvisors;
address public addressDividendReserve;
address public addressPrivateSale;
uint256 public summBounty;
uint256 public summAirdrop;
uint256 public summTeam;
uint256 public summAdvisors;
uint256 public summDividendReserve;
uint256 public summPrivateSale;
function LTE() public {
addressBounty = 0xe70D1a8D548aFCdB4B5D162DaF8668E1E97796FB;
addressAirdrop = 0x024d96Ad09a076A88F0EA716B38EdB36B8A636DD;
addressTeam = 0xCe1932A41aaC4D8d838a41f2D10E4b154f719Eb1;
addressAdvisors = 0x9f3D002255B96F39F96961F40FdD2a1C3d40B919;
addressDividendReserve = 0xB647e8157270cCc5dB202FFa7C5CC80992645Ec7;
addressPrivateSale = 0x953b3f258f441BC49d0a6f21f41E86E5ab9e6715;
// Token distribution
summBounty = 779600 * (10 ** uint256(decimals));
summAirdrop = 779600 * (10 ** uint256(decimals));
summTeam = 9745000 * (10 ** uint256(decimals));
summAdvisors = 1949000 * (10 ** uint256(decimals));
summDividendReserve = 12160400 * (10 ** uint256(decimals));
summPrivateSale = 8000000 * (10 ** uint256(decimals));
// Founders and supporters initial Allocations
mint(addressBounty, summBounty);
mint(addressAirdrop, summAirdrop);
mint(addressTeam, summTeam);
mint(addressAdvisors, summAdvisors);
mint(addressDividendReserve, summDividendReserve);
mint(addressPrivateSale, summPrivateSale);
}
}
/**
* @title Crowdsale
* @dev Crowdsale is a base contract for managing a token crowdsale.
* Crowdsales have a start and end timestamps, where Contributors can make
* token Contributions and the crowdsale will assign them tokens based
* on a token per ETH rate. Funds collected are forwarded to a wallet
* as they arrive. The contract requires a MintableToken that will be
* minted as contributions arrive, note that the crowdsale contract
* must be owner of the token in order to be able to mint it.
*/
contract Crowdsale is Ownable {
using SafeMath for uint256;
LTE public token;
// start and end timestamps where investments are allowed (both inclusive)
uint256 public startPreICOStage1;
uint256 public endPreICOStage1;
uint256 public startPreICOStage2;
uint256 public endPreICOStage2;
uint256 public startPreICOStage3;
uint256 public endPreICOStage3;
uint256 public startICOStage1;
uint256 public endICOStage1;
uint256 public startICOStage2;
uint256 public endICOStage2;
//token distribution
// uint256 public maxIco;
uint256 public sumPreICO1;
uint256 public sumPreICO2;
uint256 public sumPreICO3;
uint256 public sumICO1;
uint256 public sumICO2;
//Hard cap
uint256 public sumHardCapPreICO1;
uint256 public sumHardCapPreICO2;
uint256 public sumHardCapPreICO3;
uint256 public sumHardCapICO1;
uint256 public sumHardCapICO2;
uint256 public totalSoldTokens;
//uint256 public minimumContribution;
// how many token units a Contributor gets per wei
uint256 public rateIco;
// address where funds are collected
address public wallet;
/**
* event for token Procurement logging
* @param contributor who Pledged for the tokens
* @param beneficiary who got the tokens
* @param value weis Contributed for Procurement
* @param amount amount of tokens Procured
*/
event TokenProcurement(address indexed contributor, address indexed beneficiary, uint256 value, uint256 amount);
function Crowdsale() public {
token = createTokenContract();
// rate;
rateIco = 2286;
// start and end timestamps where investments are allowed
//start/end for stage of ICO
startPreICOStage1 = 1532908800; // July 30 2018 00:00:00 +0000
endPreICOStage1 = 1533859200; // August 10 2018 00:00:00 +0000
startPreICOStage2 = 1533859200; // August 10 2018 00:00:00 +0000
endPreICOStage2 = 1534723200; // August 20 2018 00:00:00 +0000
startPreICOStage3 = 1534723200; // August 20 2018 00:00:00 +0000
endPreICOStage3 = 1535587200; // August 30 2018 00:00:00 +0000
startICOStage1 = 1535587200; // August 30 2018 00:00:00 +0000
endICOStage1 = 1536105600; // September 5 2018 00:00:00 +0000
startICOStage2 = 1536105600; // September 5 2018 00:00:00 +0000
endICOStage2 = 1536537600; // September 10 2018 00:00:00 +0000
sumHardCapPreICO1 = 3900000 * 1 ether;
sumHardCapPreICO2 = 5000000 * 1 ether;
sumHardCapPreICO3 = 5750000 * 1 ether;
sumHardCapICO1 = 9900000 * 1 ether;
sumHardCapICO2 = 20000000 * 1 ether;
// address where funds are collected
wallet = 0x6e9f5B0E49A7039bD1d4bdE84e4aF53b8194287d;
}
function setRateIco(uint _rateIco) public onlyOwner {
rateIco = _rateIco;
}
// fallback function can be used to Procure tokens
function () external payable {
procureTokens(msg.sender);
}
function createTokenContract() internal returns (LTE) {
return new LTE();
}
function getRateIcoWithBonus() public view returns (uint256) {
uint256 bonus;
//PreICO
if (now >= startPreICOStage1 && now < endPreICOStage1){
bonus = 30;
}
if (now >= startPreICOStage2 && now < endPreICOStage2){
bonus = 25;
}
if (now >= startPreICOStage3 && now < endPreICOStage3){
bonus = 15;
}
if (now >= startICOStage1 && now < endICOStage1){
bonus = 10;
}
if (now >= startICOStage2 && now < endICOStage2){
bonus = 0;
}
return rateIco + rateIco.mul(bonus).div(100);
}
function checkHardCap(uint256 _value) public {
//PreICO
if (now >= startPreICOStage1 && now < endPreICOStage1){
require(_value.add(sumPreICO1) <= sumHardCapPreICO1);
sumPreICO1 = sumPreICO1.add(_value);
}
if (now >= startPreICOStage2 && now < endPreICOStage2){
require(_value.add(sumPreICO2) <= sumHardCapPreICO2);
sumPreICO2 = sumPreICO2.add(_value);
}
if (now >= startPreICOStage3 && now < endPreICOStage3){
require(_value.add(sumPreICO3) <= sumHardCapPreICO3);
sumPreICO3 = sumPreICO3.add(_value);
}
if (now >= startICOStage1 && now < endICOStage1){
require(_value.add(sumICO1) <= sumHardCapICO1);
sumICO1 = sumICO1.add(_value);
}
if (now >= startICOStage2 && now < endICOStage2){
require(_value.add(sumICO2) <= sumHardCapICO2);
sumICO2 = sumICO2.add(_value);
}
}
function procureTokens(address _beneficiary) public payable {
uint256 tokens;
uint256 weiAmount = msg.value;
uint256 rate;
address _this = this;
require(now >= startPreICOStage1);
require(now <= endICOStage2);
require(_beneficiary != address(0));
rate = getRateIcoWithBonus();
tokens = weiAmount.mul(rate);
checkHardCap(tokens);
//totalSoldTokens = totalSoldTokens.add(tokens);
wallet.transfer(_this.balance);
token.mint(_beneficiary, tokens);
emit TokenProcurement(msg.sender, _beneficiary, weiAmount, tokens);
}
}
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