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pragma solidity ^0.4.21;
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) {
uint256 c = a / b;
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;
}
}
contract Ownable {
address public owner;
constructor() public {
owner = msg.sender;
}
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
function transferOwnership(address newOwner) public onlyOwner {
if (newOwner != address(0)) {
owner = newOwner;
}
}
}
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);
}
contract BasicToken is ERC20Basic {
using SafeMath for uint256;
mapping(address => uint256) balances;
function transfer(address _to, uint256 _value) public returns (bool) {
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
return true;
}
function balanceOf(address _owner) public constant returns (uint256 balance) {
return balances[_owner];
}
}
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);
}
contract StandardToken is ERC20, BasicToken {
mapping (address => mapping (address => uint256)) allowed;
function transferFrom(address _from, address _to, uint256 _value) public returns (bool) {
uint256 _allowance = allowed[_from][msg.sender];
balances[_to] = balances[_to].add(_value);
balances[_from] = balances[_from].sub(_value);
allowed[_from][msg.sender] = _allowance.sub(_value);
return true;
}
function approve(address _spender, uint256 _value) public returns (bool) {
require((_value == 0) || (allowed[msg.sender][_spender] == 0));
allowed[msg.sender][_spender] = _value;
return true;
}
function allowance(address _owner, address _spender) public constant returns (uint256 remaining) {
return allowed[_owner][_spender];
}
}
contract BBBToken is StandardToken, Ownable {
using SafeMath for uint256;
string public constant NAME = "M724 Coin";
string public constant SYMBOL = "M724";
uint8 public constant DECIMALS = 18;
uint256 public startDate1;
uint256 public endDate1;
uint256 public startDate2;
uint256 public endDate2;
uint256 public saleCap;
address public tokenWallet;
address public fundWallet;
uint256 public weiRaised;
event TokenPurchase(address indexed purchaser, uint256 value, uint256 amount);
modifier uninitialized() {
require(tokenWallet == 0x0);
require(fundWallet == 0x0);
_;
}
constructor() public {}
function () public payable {
buyTokens(msg.sender, msg.value);
}
function getDate() public view returns(uint256 _date) {
_date = getCurrentTimestamp();
}
function initialize(address _tokenWallet, address _fundWallet, uint256 _start1, uint256 _end1,
uint256 _saleCap, uint256 _totalSupply) public
onlyOwner uninitialized {
require(_start1 < _end1);
require(_tokenWallet != 0x0);
require(_fundWallet != 0x0);
require(_totalSupply >= _saleCap);
startDate1 = _start1;
endDate1 = _end1;
saleCap = _saleCap;
tokenWallet = _tokenWallet;
fundWallet = _fundWallet;
totalSupply = _totalSupply;
balances[tokenWallet] = saleCap;
balances[0xb1] = _totalSupply.sub(saleCap);
}
function setPeriod(uint period, uint256 _start, uint256 _end) public onlyOwner {
require(_end > _start);
if (period == 1) {
startDate1 = _start;
endDate1 = _end;
}else if (period == 2) {
require(_start > endDate1);
startDate2 = _start;
endDate2 = _end;
}
}
function sendForPreICO(address buyer, uint256 amount) public onlyOwner {
require(saleCap >= amount);
saleCap = saleCap - amount;
balances[tokenWallet] = balances[tokenWallet].sub(amount);
balances[buyer] = balances[buyer].add(amount);
}
function setSaleCap(uint256 _saleCap) public onlyOwner {
require(balances[0xb1].add(balances[tokenWallet]).sub(_saleCap) > 0);
uint256 amount=0;
if (balances[tokenWallet] > _saleCap) {
amount = balances[tokenWallet].sub(_saleCap);
balances[0xb1] = balances[0xb1].add(amount);
} else {
amount = _saleCap.sub(balances[tokenWallet]);
balances[0xb1] = balances[0xb1].sub(amount);
}
balances[tokenWallet] = _saleCap;
saleCap = _saleCap;
}
function getBonusByTime(uint256 atTime) public constant returns (uint256) {
if (atTime < startDate1) {
return 0;
} else if (endDate1 > atTime && atTime > startDate1) {
return 5000;
} else if (endDate2 > atTime && atTime > startDate2) {
return 2500;
} else {
return 0;
}
}
function getBounsByAmount(uint256 etherAmount, uint256 tokenAmount) public pure returns (uint256) {
uint256 bonusRatio = etherAmount.div(500 ether);
if (bonusRatio > 4) {
bonusRatio = 4;
}
uint256 bonusCount = SafeMath.mul(bonusRatio, 10);
uint256 bouns = SafeMath.mul(tokenAmount, bonusCount);
uint256 realBouns = SafeMath.div(bouns, 100);
return realBouns;
}
function finalize() public onlyOwner {
require(!saleActive());
balances[tokenWallet] = balances[tokenWallet].add(balances[0xb1]);
balances[0xb1] = 0;
}
function saleActive() public constant returns (bool) {
return (
(getCurrentTimestamp() >= startDate1 &&
getCurrentTimestamp() < endDate1 && saleCap > 0) ||
(getCurrentTimestamp() >= startDate2 &&
getCurrentTimestamp() < endDate2 && saleCap > 0)
);
}
function getCurrentTimestamp() internal view returns (uint256) {
return now;
}
function buyTokens(address sender, uint256 value) internal {
require(saleActive());
require(value >= 0.5 ether);
uint256 bonus = getBonusByTime(getCurrentTimestamp());
uint256 amount = value.mul(bonus);
if (getCurrentTimestamp() >= startDate1 && getCurrentTimestamp() < endDate1) {
uint256 p1Bouns = getBounsByAmount(value, amount);
amount = amount + p1Bouns;
}
require(saleCap >= amount);
balances[tokenWallet] = balances[tokenWallet].sub(amount);
balances[sender] = balances[sender].add(amount);
saleCap = saleCap - amount;
weiRaised = weiRaised + value;
fundWallet.transfer(msg.value);
}
} |