Contract Name:
DragonToken
Contract Source Code:
File 1 of 1 : DragonToken
pragma solidity ^0.4.15;
/**
* @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 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;
}
}
library DateTime {
/*
* Date and Time utilities for ethereum contracts
*
*/
struct MyDateTime {
uint16 year;
uint8 month;
uint8 day;
uint8 hour;
uint8 minute;
uint8 second;
uint8 weekday;
}
uint constant DAY_IN_SECONDS = 86400;
uint constant YEAR_IN_SECONDS = 31536000;
uint constant LEAP_YEAR_IN_SECONDS = 31622400;
uint constant HOUR_IN_SECONDS = 3600;
uint constant MINUTE_IN_SECONDS = 60;
uint16 constant ORIGIN_YEAR = 1970;
function isLeapYear(uint16 year) constant returns (bool) {
if (year % 4 != 0) {
return false;
}
if (year % 100 != 0) {
return true;
}
if (year % 400 != 0) {
return false;
}
return true;
}
function leapYearsBefore(uint year) constant returns (uint) {
year -= 1;
return year / 4 - year / 100 + year / 400;
}
function getDaysInMonth(uint8 month, uint16 year) constant returns (uint8) {
if (month == 1 || month == 3 || month == 5 || month == 7 || month == 8 || month == 10 || month == 12) {
return 31;
}
else if (month == 4 || month == 6 || month == 9 || month == 11) {
return 30;
}
else if (isLeapYear(year)) {
return 29;
}
else {
return 28;
}
}
function parseTimestamp(uint timestamp) internal returns (MyDateTime dt) {
uint secondsAccountedFor = 0;
uint buf;
uint8 i;
// Year
dt.year = getYear(timestamp);
buf = leapYearsBefore(dt.year) - leapYearsBefore(ORIGIN_YEAR);
secondsAccountedFor += LEAP_YEAR_IN_SECONDS * buf;
secondsAccountedFor += YEAR_IN_SECONDS * (dt.year - ORIGIN_YEAR - buf);
// Month
uint secondsInMonth;
for (i = 1; i <= 12; i++) {
secondsInMonth = DAY_IN_SECONDS * getDaysInMonth(i, dt.year);
if (secondsInMonth + secondsAccountedFor > timestamp) {
dt.month = i;
break;
}
secondsAccountedFor += secondsInMonth;
}
// Day
for (i = 1; i <= getDaysInMonth(dt.month, dt.year); i++) {
if (DAY_IN_SECONDS + secondsAccountedFor > timestamp) {
dt.day = i;
break;
}
secondsAccountedFor += DAY_IN_SECONDS;
}
// Hour
dt.hour = 0;//getHour(timestamp);
// Minute
dt.minute = 0;//getMinute(timestamp);
// Second
dt.second = 0;//getSecond(timestamp);
// Day of week.
dt.weekday = 0;//getWeekday(timestamp);
}
function getYear(uint timestamp) constant returns (uint16) {
uint secondsAccountedFor = 0;
uint16 year;
uint numLeapYears;
// Year
year = uint16(ORIGIN_YEAR + timestamp / YEAR_IN_SECONDS);
numLeapYears = leapYearsBefore(year) - leapYearsBefore(ORIGIN_YEAR);
secondsAccountedFor += LEAP_YEAR_IN_SECONDS * numLeapYears;
secondsAccountedFor += YEAR_IN_SECONDS * (year - ORIGIN_YEAR - numLeapYears);
while (secondsAccountedFor > timestamp) {
if (isLeapYear(uint16(year - 1))) {
secondsAccountedFor -= LEAP_YEAR_IN_SECONDS;
}
else {
secondsAccountedFor -= YEAR_IN_SECONDS;
}
year -= 1;
}
return year;
}
function getMonth(uint timestamp) constant returns (uint8) {
return parseTimestamp(timestamp).month;
}
function getDay(uint timestamp) constant returns (uint8) {
return parseTimestamp(timestamp).day;
}
function getHour(uint timestamp) constant returns (uint8) {
return uint8((timestamp / 60 / 60) % 24);
}
function getMinute(uint timestamp) constant returns (uint8) {
return uint8((timestamp / 60) % 60);
}
function getSecond(uint timestamp) constant returns (uint8) {
return uint8(timestamp % 60);
}
function toTimestamp(uint16 year, uint8 month, uint8 day) constant returns (uint timestamp) {
return toTimestamp(year, month, day, 0, 0, 0);
}
function toDay(uint256 timestamp) internal returns (uint256) {
MyDateTime memory d = parseTimestamp(timestamp);
return uint256(d.year) * 10000 + uint256(d.month) * 100 + uint256(d.day);
}
function toTimestamp(uint16 year, uint8 month, uint8 day, uint8 hour, uint8 minute, uint8 second) constant returns (uint timestamp) {
uint16 i;
// Year
for (i = ORIGIN_YEAR; i < year; i++) {
if (isLeapYear(i)) {
timestamp += LEAP_YEAR_IN_SECONDS;
}
else {
timestamp += YEAR_IN_SECONDS;
}
}
// Month
uint8[12] memory monthDayCounts;
monthDayCounts[0] = 31;
if (isLeapYear(year)) {
monthDayCounts[1] = 29;
}
else {
monthDayCounts[1] = 28;
}
monthDayCounts[2] = 31;
monthDayCounts[3] = 30;
monthDayCounts[4] = 31;
monthDayCounts[5] = 30;
monthDayCounts[6] = 31;
monthDayCounts[7] = 31;
monthDayCounts[8] = 30;
monthDayCounts[9] = 31;
monthDayCounts[10] = 30;
monthDayCounts[11] = 31;
for (i = 1; i < month; i++) {
timestamp += DAY_IN_SECONDS * monthDayCounts[i - 1];
}
// Day
timestamp += DAY_IN_SECONDS * (day - 1);
// Hour
timestamp += HOUR_IN_SECONDS * (hour);
// Minute
timestamp += MINUTE_IN_SECONDS * (minute);
// Second
timestamp += second;
return timestamp;
}
}
/**
* @title Claimable
* @dev Extension for the Ownable contract, where the ownership needs to be claimed.
* This allows the new owner to accept the transfer.
*/
contract Claimable is Ownable {
address public pendingOwner;
/**
* @dev Modifier throws if called by any account other than the pendingOwner.
*/
modifier onlyPendingOwner() {
require(msg.sender == pendingOwner);
_;
}
/**
* @dev Allows the current owner to set the pendingOwner address.
* @param newOwner The address to transfer ownership to.
*/
function transferOwnership(address newOwner) onlyOwner {
pendingOwner = newOwner;
}
/**
* @dev Allows the pendingOwner address to finalize the transfer.
*/
function claimOwnership() onlyPendingOwner {
owner = pendingOwner;
pendingOwner = 0x0;
}
}
contract Operational is Claimable {
address public operator;
function Operational(address _operator) {
operator = _operator;
}
modifier onlyOperator() {
require(msg.sender == operator);
_;
}
function transferOperator(address newOperator) onlyOwner {
require(newOperator != address(0));
operator = newOperator;
}
}
/**
* @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) {
require(_to != address(0));
require(_value <= balances[msg.sender]);
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 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 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) {
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);
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 Helps contracts guard agains rentrancy attacks.
* @author Remco Bloemen <remco@2π.com>
* @notice If you mark a function `nonReentrant`, you should also
* mark it `external`.
*/
contract ReentrancyGuard {
/**
* @dev We use a single lock for the whole contract.
*/
bool private rentrancy_lock = false;
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* @notice If you mark a function `nonReentrant`, you should also
* mark it `external`. Calling one nonReentrant function from
* another is not supported. Instead, you can implement a
* `private` function doing the actual work, and a `external`
* wrapper marked as `nonReentrant`.
*/
modifier nonReentrant() {
require(!rentrancy_lock);
rentrancy_lock = true;
_;
rentrancy_lock = false;
}
}
/**
* @title Burnable Token
* @dev Token that can be irreversibly burned (destroyed).
*/
contract BurnableToken is StandardToken {
event Burn(address indexed burner, uint256 value);
/**
* @dev Burns a specific amount of tokens.
* @param _value The amount of token to be burned.
*/
function burn(uint256 _value) public returns (bool) {
require(_value > 0);
require(_value <= balances[msg.sender]);
// 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
address burner = msg.sender;
balances[burner] = balances[burner].sub(_value);
totalSupply = totalSupply.sub(_value);
Burn(burner, _value);
return true;
}
}
contract FrozenableToken is Operational, BurnableToken, ReentrancyGuard {
using DateTime for uint256;
uint256 public createTime;
uint256 public frozenForever;
uint256 public frozenAnnually;
struct FrozenRecord {
uint256 value;
uint256 day;
}
mapping (uint256 => FrozenRecord) public frozenBalances;
event FreezeForOwner(address indexed owner, uint256 value, uint256 unFrozenTime);
event Unfreeze(address indexed owner, uint256 value);
// freeze _value token to _unFrozenTime
function freezeForOwner(uint256 _value, uint256 _unFrozenTime) onlyOperator returns(bool) {
require(balances[owner] >= _value);
require(_unFrozenTime > createTime);
require(_unFrozenTime > now);
if (_unFrozenTime.parseTimestamp().year - createTime.parseTimestamp().year > 10 ){
balances[owner] = balances[owner].sub(_value);
frozenForever = frozenForever.add(_value);
FreezeForOwner(owner, _value, _unFrozenTime);
} else {
uint256 day = _unFrozenTime.toDay();
if (frozenBalances[day].day == day) {
revert();
}
balances[owner] = balances[owner].sub(_value);
frozenAnnually = frozenAnnually.add(_value);
frozenBalances[day] = FrozenRecord( _value, day);
FreezeForOwner(owner, _value, _unFrozenTime);
}
return true;
}
// unfreeze frozen amount
function unfreeze(uint256 _unFrozenTime) onlyOperator returns (bool) {
require(_unFrozenTime < block.timestamp);
uint256 day = _unFrozenTime.toDay();
uint256 _value = frozenBalances[day].value;
if (_value>0) {
frozenBalances[day].value = 0;
frozenAnnually = frozenAnnually.sub(_value);
balances[owner] = balances[owner].add(_value);
Unfreeze(owner, _value);
}
return true;
}
}
contract DragonReleaseableToken is FrozenableToken {
using SafeMath for uint;
using DateTime for uint256;
uint256 standardDecimals = 100000000; // match decimals
uint256 public award = standardDecimals.mul(51200); // award per day
event ReleaseSupply(address indexed receiver, uint256 value, uint256 releaseTime);
struct ReleaseRecord {
uint256 amount; // release amount
uint256 releasedDay;
}
mapping (uint256 => ReleaseRecord) public releasedRecords;
function DragonReleaseableToken(
address operator
) Operational(operator) {
createTime = 1509580800;
}
function releaseSupply(uint256 timestamp) onlyOperator returns(uint256 _actualRelease) {
require(timestamp >= createTime && timestamp <= now);
require(!judgeReleaseRecordExist(timestamp));
updateAward(timestamp);
balances[owner] = balances[owner].add(award);
totalSupply = totalSupply.add(award);
uint256 releasedDay = timestamp.toDay();
releasedRecords[releasedDay] = ReleaseRecord(award, releasedDay);
ReleaseSupply(owner, award, timestamp);
return award;
}
function judgeReleaseRecordExist(uint256 timestamp) internal returns(bool _exist) {
bool exist = false;
uint256 day = timestamp.toDay();
if (releasedRecords[day].releasedDay == day){
exist = true;
}
return exist;
}
function updateAward(uint256 timestamp) internal {
if (timestamp < createTime.add(1 years)) {
award = standardDecimals.mul(51200);
} else if (timestamp < createTime.add(2 years)) {
award = standardDecimals.mul(25600);
} else if (timestamp < createTime.add(3 years)) {
award = standardDecimals.mul(12800);
} else if (timestamp < createTime.add(4 years)) {
award = standardDecimals.mul(6400);
} else if (timestamp < createTime.add(5 years)) {
award = standardDecimals.mul(3200);
} else if (timestamp < createTime.add(6 years)) {
award = standardDecimals.mul(1600);
} else if (timestamp < createTime.add(7 years)) {
award = standardDecimals.mul(800);
} else if (timestamp < createTime.add(8 years)) {
award = standardDecimals.mul(400);
} else if (timestamp < createTime.add(9 years)) {
award = standardDecimals.mul(200);
} else if (timestamp < createTime.add(10 years)) {
award = standardDecimals.mul(100);
} else {
award = 0;
}
}
}
contract DragonToken is DragonReleaseableToken {
string public standard = '2017111504';
string public name = 'DragonToken';
string public symbol = 'DT';
uint8 public decimals = 8;
function DragonToken(
address operator
) DragonReleaseableToken(operator) {}
}