Contract Name:
PundiXToken
Contract Source Code:
File 1 of 1 : PundiXToken
pragma solidity ^0.4.11;
/**
* @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 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;
}
}
contract Crowdsale {
using SafeMath for uint256;
// The token being sold
MintableToken public token;
// start and end timestamps where investments are allowed (both inclusive)
uint256 public startTime;
uint256 public endTime;
// address where funds are collected
address public wallet;
// how many token units a buyer gets per wei
uint256 public rate;
// amount of raised money in wei
uint256 public weiRaised;
/**
* event for token purchase logging
* @param purchaser who paid for the tokens
* @param beneficiary who got the tokens
* @param value weis paid for purchase
* @param amount amount of tokens purchased
*/
event TokenPurchase(address indexed purchaser, address indexed beneficiary, uint256 value, uint256 amount);
function Crowdsale(uint256 _startTime, uint256 _endTime, uint256 _rate, address _wallet) {
require(_startTime >= now);
require(_endTime >= _startTime);
require(_rate > 0);
require(_wallet != 0x0);
token = createTokenContract();
startTime = _startTime;
endTime = _endTime;
rate = _rate;
wallet = _wallet;
}
// creates the token to be sold.
// override this method to have crowdsale of a specific mintable token.
function createTokenContract() internal returns (MintableToken) {
return new MintableToken();
}
// fallback function can be used to buy tokens
function () payable {
buyTokens(msg.sender);
}
// low level token purchase function
function buyTokens(address beneficiary) payable {
require(beneficiary != 0x0);
require(validPurchase());
uint256 weiAmount = msg.value;
// calculate token amount to be created
uint256 tokens = weiAmount.mul(rate);
// update state
weiRaised = weiRaised.add(weiAmount);
token.mint(beneficiary, tokens);
TokenPurchase(msg.sender, beneficiary, weiAmount, tokens);
forwardFunds();
}
// send ether to the fund collection wallet
// override to create custom fund forwarding mechanisms
function forwardFunds() internal {
wallet.transfer(msg.value);
}
// @return true if the transaction can buy tokens
function validPurchase() internal constant returns (bool) {
bool withinPeriod = now >= startTime && now <= endTime;
bool nonZeroPurchase = msg.value != 0;
return withinPeriod && nonZeroPurchase;
}
// @return true if crowdsale event has ended
function hasEnded() public constant returns (bool) {
return now > endTime;
}
}
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);
}
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);
}
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) {
require(_to != address(0));
// SafeMath.sub will throw if there is not enough balance.
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];
}
}
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 amount of tokens to be transferred
*/
function transferFrom(address _from, address _to, uint256 _value) returns (bool) {
require(_to != address(0));
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[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = _allowance.sub(_value);
Transfer(_from, _to, _value);
return true;
}
/**
* @dev Approve 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 specifying the amount of tokens still available for the spender.
*/
function allowance(address _owner, address _spender) 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)
returns (bool success) {
allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue);
Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
function decreaseApproval (address _spender, uint _subtractedValue)
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);
}
Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
}
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 MintableToken is StandardToken, Ownable {
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 returns (bool) {
totalSupply = totalSupply.add(_amount);
balances[_to] = balances[_to].add(_amount);
Mint(_to, _amount);
Transfer(0x0, _to, _amount);
return true;
}
/**
* @dev Function to stop minting new tokens.
* @return True if the operation was successful.
*/
function finishMinting() onlyOwner returns (bool) {
mintingFinished = true;
MintFinished();
return true;
}
}
contract PundiXToken is MintableToken, BurnableToken {
event ShowCurrentIndex(address indexed to, uint256 value);
event ShowBonus(address indexed to, uint256 value);
string public constant name = "Pundi X Token";
string public constant symbol = "PXS";
uint8 public constant decimals = 18;
uint256 public totalSupplyBonus;
uint64[] public bonusTimeList = [
1512057600,1514736000,1517414400,1519833600,1522512000,1525104000,1527782400,1530374400,1533052800,1535731200,1538323200,1541001600,
1543593600,1546272000,1548950400,1551369600,1554048000,1556640000,1559318400,1561910400,1564588800,1567267200,1569859200,1572537600,
1575129600,1577808000,1580486400,1582992000,1585670400,1588262400,1590940800,1593532800,1596211200,1598889600,1601481600,1604160000];
uint8 public currentTimeIndex;
function PundiXToken() {
currentTimeIndex = 0;
}
// --------------------------------------------------------
mapping(address=>uint256) weiBalance;
address[] public investors;
function addWei(address _address, uint256 _value) onlyOwner canMint public {
uint256 value = weiBalance[_address];
if (value == 0) {
investors.push(_address);
}
weiBalance[_address] = value.add(_value);
}
function getInvestorsCount() constant onlyOwner public returns (uint256 investorsCount) {
return investors.length;
}
function getWeiBalance(address _address) constant onlyOwner public returns (uint256 balance) {
return weiBalance[_address];
}
// --------------------------------------------------------
function transferFrom(address _from, address _to, uint256 _value) public returns (bool) {
bool result = super.transferFrom(_from, _to, _value);
if (result && currentTimeIndex < bonusTimeList.length) {
bonus(_from);
bonus(_to);
}
return result;
}
function transfer(address _to, uint256 _value) public returns (bool) {
bool result = super.transfer(_to, _value);
if (result && currentTimeIndex < bonusTimeList.length) {
bonus(msg.sender);
bonus(_to);
}
return result;
}
function mint(address _to, uint256 _amount) onlyOwner canMint public returns (bool) {
bool result = super.mint(_to, _amount);
if (result) {
bonus(_to);
}
return result;
}
function burn(uint256 _value) public {
super.burn(_value);
if (currentTimeIndex < bonusTimeList.length) {
bonus(msg.sender);
}
}
// --------------------------------------------------------
mapping(address => User) public users;
struct User {
uint256 txTimestamp;
uint256[] monthBalance;
uint8 monthIndex;
uint256[] receiveBonus;
uint8 receiveIndex;
}
function bonus(address _address) internal {
User storage user = users[_address];
tryNextTimeRange();
uint64 maxTime = bonusTimeList[currentTimeIndex];
if (user.txTimestamp > maxTime) {
return;
}
uint64 minTime = 0;
if (currentTimeIndex > 0) {
minTime = bonusTimeList[currentTimeIndex-1];
}
for (uint _i = user.monthBalance.length; _i <= currentTimeIndex; _i++) {
user.monthBalance.push(0);
}
// first time
if (user.txTimestamp == 0) {
user.monthBalance[currentTimeIndex] = balances[_address];
user.monthIndex = currentTimeIndex;
} else if (user.txTimestamp >= minTime) {
user.monthBalance[currentTimeIndex] = balances[_address];
} else { // (user.txTimestamp < minTime) cross month
uint256 pBalance = user.monthBalance[user.monthIndex];
for (uint8 i = user.monthIndex; i < currentTimeIndex; i++) {
user.monthBalance[i] = pBalance;
}
user.monthBalance[currentTimeIndex] = balances[_address];
user.monthIndex = currentTimeIndex;
}
user.txTimestamp = now;
}
function tryNextTimeRange() internal {
uint8 len = uint8(bonusTimeList.length) - 1;
uint64 _now = uint64(now);
for(; currentTimeIndex < len; currentTimeIndex++) {
if (bonusTimeList[currentTimeIndex] >= _now) {
break;
}
}
}
function receiveBonus() public {
tryNextTimeRange();
if (currentTimeIndex == 0) {
return;
}
address addr = msg.sender;
User storage user = users[addr];
if (user.monthIndex < currentTimeIndex) {
bonus(addr);
}
User storage xuser = users[addr];
if (xuser.receiveIndex == xuser.monthIndex || xuser.receiveIndex >= bonusTimeList.length) {
return;
}
require(user.receiveIndex < user.monthIndex);
uint8 monthInterval = xuser.monthIndex - xuser.receiveIndex;
uint256 bonusToken = 0;
if (monthInterval > 6) {
uint8 _length = monthInterval - 6;
for (uint8 j = 0; j < _length; j++) {
xuser.receiveBonus.push(0);
xuser.receiveIndex++;
}
}
uint256 balance = xuser.monthBalance[xuser.monthIndex];
for (uint8 i = xuser.receiveIndex; i < xuser.monthIndex; i++) {
uint256 preMonthBonus = calculateBonusToken(i, balance);
balance = preMonthBonus.add(balance);
bonusToken = bonusToken.add(preMonthBonus);
xuser.receiveBonus.push(preMonthBonus);
xuser.receiveIndex++;
}
// 事件
ShowBonus(addr, bonusToken);
if (bonusToken == 0) {
return;
}
totalSupplyBonus = totalSupplyBonus.sub(bonusToken);
this.transfer(addr, bonusToken);
}
function calculateBonusToken(uint8 _monthIndex, uint256 _balance) internal returns (uint256) {
uint256 bonusToken = 0;
if (_monthIndex < 12) {
// 7.31606308769453%
bonusToken = _balance.div(10000000000000000).mul(731606308769453);
} else if (_monthIndex < 24) {
// 2.11637098909784%
bonusToken = _balance.div(10000000000000000).mul(211637098909784);
} else if (_monthIndex < 36) {
// 0.881870060450728%
bonusToken = _balance.div(100000000000000000).mul(881870060450728);
}
return bonusToken;
}
function calculationTotalSupply() onlyOwner {
uint256 u1 = totalSupply.div(10);
uint256 year1 = u1.mul(4);
uint256 year2 = u1.mul(2);
uint256 year3 = u1;
totalSupplyBonus = year1.add(year2).add(year3);
}
function recycleUnreceivedBonus(address _address) onlyOwner {
tryNextTimeRange();
require(currentTimeIndex > 34);
uint64 _now = uint64(now);
uint64 maxTime = bonusTimeList[currentTimeIndex];
uint256 bonusToken = 0;
// TODO 180 days
uint64 finalTime = 180 days + maxTime;
if (_now > finalTime) {
bonusToken = totalSupplyBonus;
totalSupplyBonus = 0;
}
require(bonusToken != 0);
this.transfer(_address, bonusToken);
}
}