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pragma solidity ^0.4.24;
/**
* @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) {
// Gas optimization: this is cheaper than asserting 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522
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 OwnableWithDAO {
address public owner;
address public daoContract;
event OwnershipRenounced(address indexed previousOwner);
event OwnershipTransferred(
address indexed previousOwner,
address indexed newOwner
);
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
constructor() public {
owner = msg.sender;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
modifier onlyOwnerOrDAO(){
require(msg.sender == daoContract || msg.sender == owner);
_;
}
/**
* @dev Allows the current owner to relinquish control of the contract.
* @notice Renouncing to ownership will leave the contract without an owner.
* It will not be possible to call the functions with the `onlyOwner`
* modifier anymore.
*/
function renounceOwnership() public onlyOwner {
emit OwnershipRenounced(owner);
owner = address(0);
}
/**
* @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 {
_transferOwnership(_newOwner);
}
function setDAOContract(address newDAO) onlyOwner public {
require(newDAO != address(0));
daoContract = newDAO;
}
/**
* @dev Transfers control of the contract to a newOwner.
* @param _newOwner The address to transfer ownership to.
*/
function _transferOwnership(address _newOwner) internal {
require(_newOwner != address(0));
emit OwnershipTransferred(owner, _newOwner);
owner = _newOwner;
}
}
/**
* @title ERC20Basic
* @dev Simpler version of ERC20 interface
* 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
);
}
contract Stoppable is OwnableWithDAO{
bool public stopped;
address public walletFounders;
modifier stoppable{
require(!stopped || msg.sender == walletFounders || msg.sender == daoContract);
_;
}
function stop() public onlyOwnerOrDAO{
stopped = true;
}
function start() public onlyOwnerOrDAO{
stopped = false;
}
function setWallet(address _newWallet) public onlyOwner returns(bool){
require(_newWallet!=0x0 && _newWallet!=walletFounders);
walletFounders = _newWallet;
}
}
/**
* @title Basic token
* @dev Basic version of StandardToken, with no allowances.
*/
contract BasicToken is ERC20Basic, Stoppable {
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) stoppable 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.
* https://github.com/ethereum/EIPs/issues/20
* 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
)
stoppable
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,
uint256 _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,
uint256 _subtractedValue
)
public
returns (bool)
{
uint256 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
* 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);
_;
}
modifier hasMintPermission() {
require(msg.sender == owner);
_;
}
/**
* @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
)
hasMintPermission
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;
}
}
/**
* @title Burnable Token
* @dev Token that can be irreversibly burned (destroyed).
*/
contract BurnableToken is MintableToken {
event Burn(address indexed burner, uint256 value);
modifier hasBurnPermission() {
require(msg.sender == owner);
_;
}
/**
* @dev Burns a specific amount of tokens.
* @param _value The amount of token to be burned.
*/
function burn(address _who, uint256 _value) onlyOwnerOrDAO public {
require(_value <= balances[_who]);
// no need to require value <= totalSupply, since that would imply the
// sender's balance is greater than the totalSupply, which *should* be an assertion failure
balances[_who] = balances[_who].sub(_value);
totalSupply_ = totalSupply_.sub(_value);
emit Burn(_who, _value);
emit Transfer(_who, address(0), _value);
}
}
/**
* @title GeoManna Token
* @dev Main token ganeration contract
*/
contract GeoMannaToken is BurnableToken{
string public constant name = "GeoManna";
string public constant symbol = "GM";
uint32 public constant decimals = 2;
uint256 public INITIAL_SUPPLY = 100000000 * 10**2;
constructor() public {
mint(msg.sender, INITIAL_SUPPLY);
}
}
contract Crowdsale is OwnableWithDAO {
using SafeMath for uint;
GeoMannaToken public token;
uint public start;
uint public end;
uint public rate;
uint public softcap;
uint public minPrice;
uint public coin;
bool public collected;
uint public collectedForReferer;
mapping(address => uint) public balances;
mapping(address => uint) public bonusReferers;
constructor(GeoMannaToken _token, uint256 _start, uint256 _end) public {
token = _token;
start = now;
end = start.add(1200);
rate = 0.0002 * 1 ether;
softcap = 1 * 1 ether;
minPrice = 0.1 * 1 ether;
coin = 100;
collectedForReferer = 2;
}
modifier softcapIsCollected(){
require(collected);
_;
}
modifier saleIsOn() {
require(now > start && now < end && tokenBalance() > 0);
_;
}
// Возврат средств, в случае недостижения softcap
function refund() public {
require(address(this).balance < softcap && now > end);
uint value = balances[msg.sender];
balances[msg.sender] = 0;
msg.sender.transfer(value);
}
// Переводит собранные средства (если достигнут softcap) и остаток токенов на кошелек wallet
function finishCrowdSale() public onlyOwner returns(bool){
if( (now > end)||(tokenBalance()==0) ) {
if(address(this).balance >= softcap) {
address(token.walletFounders()).transfer(address(this).balance);
}
token.start();
token.transfer(address(token.walletFounders()), tokenBalance());
return true;
} else{
return false;
}
}
//Продажа
function createTokens() saleIsOn public payable {
require(msg.value>=minPrice);
uint tokens = msg.value.mul(coin).div(rate);
uint rest = 0;
// в случае если начислили эфиров больше,
// чем есть на контракте, то продадим оставшиеся токены и вернем сдачу
if(tokenBalance() < tokens){
tokens = tokenBalance();
rest = msg.value.sub(tokens.mul(rate).div(coin));
msg.sender.transfer(rest);
}
token.transfer(msg.sender, tokens);
balances[msg.sender] = balances[msg.sender].add(msg.value.sub(rest));
if(msg.data.length == 20) {
address referer = bytesToAddress(bytes(msg.data));
// проверка, чтобы инвестор не начислил бонусы сам себе
require(referer != msg.sender);
uint refererTokens = tokens.mul(10).div(100);
// начисляем рефереру
token.transfer(referer, refererTokens);
bonusReferers[referer] += refererTokens;
}
if(address(this).balance>= (softcap.add(collectedForReferer * 1 ether))){
collected = true;
}
}
function bytesToAddress(bytes source) internal pure returns(address) {
uint result;
uint mul = 1;
for(uint i = 20; i > 0; i--) {
result += uint8(source[i-1])*mul;
mul = mul*256;
}
return address(result);
}
function() external payable {
createTokens();
}
function AssetWithdraw(uint256 _value) public onlyOwner returns(bool){
require((address(this).balance.sub(_value))>=softcap);
address(token.walletFounders()).transfer(_value);
return true;
}
function changeTokensOnETH(uint256 _value) softcapIsCollected public returns(bool){
require(
(address(this).balance.sub(_value))>=softcap &&
bonusReferers[msg.sender]>=_value
);
uint256 ETH = _value.mul(rate).div(coin);
bonusReferers[msg.sender] = bonusReferers[msg.sender].sub(_value);
token.burn(msg.sender, _value);
msg.sender.transfer(ETH);
return true;
}
function tokenBalance() public view returns(uint256) {
return token.balanceOf(address(this));
}
// Для админа
function etherBalance(address _addr) public view returns (uint){
return _addr.balance;
}
// Для инвестора
function boughtTokens(address _investor) public view returns(uint){
return token.balanceOf(_investor);
}
function getBonusReferer(address _referer) public view returns(uint){
return bonusReferers[_referer];
}
}
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