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/*
Xsearch Token
*/
pragma solidity ^0.4.16;
/**
* @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) constant returns (uint256);
function transfer(address to, uint256 value) 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) constant returns (uint256);
function transferFrom(address from, address to, uint256 value) returns (bool);
function approve(address spender, uint256 value) returns (bool);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
function mul(uint256 a, uint256 b) internal constant returns (uint256) {
uint256 c = a * b;
assert(a == 0 || c / a == b);
return c;
}
function div(uint256 a, uint256 b) internal constant 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 constant returns (uint256) {
assert(b <= a);
return a - b;
}
function add(uint256 a, uint256 b) internal constant returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
/**
* @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) 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) 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) 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) 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) constant returns (uint256 remaining) {
return allowed[_owner][_spender];
}
}
/**
* @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() {
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) onlyOwner {
require(newOwner != address(0));
owner = newOwner;
}
}
/**
* @title Burnable Token
* @dev Token that can be irreversibly burned (destroyed).
*/
contract BurnableToken is StandardToken {
/**
* @dev Burns a specific amount of tokens.
* @param _value The amount of token to be burned.
*/
function burn(uint _value) public {
require(_value > 0);
address burner = msg.sender;
balances[burner] = balances[burner].sub(_value);
totalSupply = totalSupply.sub(_value);
Burn(burner, _value);
}
event Burn(address indexed burner, uint indexed value);
}
contract XsearchToken is BurnableToken {
string public constant name = "XSearch Token";
string public constant symbol = "XSE";
uint32 public constant decimals = 18;
uint256 public INITIAL_SUPPLY = 30000000 * 1 ether;
function XsearchToken() {
totalSupply = INITIAL_SUPPLY;
balances[msg.sender] = INITIAL_SUPPLY;
}
}
contract Crowdsale is Ownable {
using SafeMath for uint;
address multisig;
uint restrictedPercent;
address restricted;
XsearchToken public token = new XsearchToken();
uint start;
uint period;
uint rate;
function Crowdsale() {
multisig = 0xd4DB7d2086C46CDd5F21c46613B520290ABfC9D6; //escrow wallet
restricted = 0x25fbfaA7bB3FfEb697Fe59Bb464Fc49299ef5563; // wallet for 15%
restrictedPercent = 15; // 15% procent for Founders, Bounties, Distribution cost, Management costs
rate = 1000000000000000000000; //rate
start = 1522195200; //start date
period = 63; // ico period
}
modifier saleIsOn() {
require(now > start && now < start + period * 1 days);
_;
}
/*
Bonus:
privat ico 40% (min 20 eth) 28.04-05.04
pre-ico 30% (min 0.5 eth) 05.04-20.04
main ico
R1(20.04-26.04): +15%min deposit 0.1ETH;
R2(27.04-06.05): +10% min deposit 0.1ETH;
R3(07.05-15.05): +5% bonus; min deposit 0.1ETH;
R4(16.05-30.05): 0% bonus; min deposit 0.1ETH;
*/
function createTokens() saleIsOn payable {
multisig.transfer(msg.value);
uint tokens = rate.mul(msg.value).div(1 ether);
uint bonusTokens = 0;
uint saleTime = period * 1 days;
if(now >= start && now < start + 8 * 1 days) {
bonusTokens = tokens.mul(40).div(100);
} else if(now >= start + 8 * 1 days && now < start + 24 * 1 days) {
bonusTokens = tokens.mul(30).div(100);
} else if(now >= start + 24 * 1 days && now <= start + 30 * 1 days) {
bonusTokens = tokens.mul(15).div(100);
} else if(now >= start + 31 * 1 days && now <= start + 40 * 1 days) {
bonusTokens = tokens.mul(10).div(100);
} else if(now >= start + 41 * 1 days && now <= start + 49 * 1 days) {
bonusTokens = tokens.mul(5).div(100);
} else if(now >= start + 50 * 1 days && now <= start + 64 * 1 days) {
bonusTokens = 0;
} else {
bonusTokens = 0;
}
uint tokensWithBonus = tokens.add(bonusTokens);
token.transfer(msg.sender, tokensWithBonus);
uint restrictedTokens = tokens.mul(restrictedPercent).div(100 - restrictedPercent);
token.transfer(restricted, restrictedTokens);
}
function() external payable {
createTokens();
}
}