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pragma solidity ^0.4.13;
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 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;
}
}
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 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;
}
}
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;
}
}
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];
}
}
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];
}
}
contract LockableToken is StandardToken, ReentrancyGuard {
struct LockedBalance {
address owner;
uint256 value;
uint256 releaseTime;
}
mapping (uint => LockedBalance) public lockedBalances;
uint public lockedBalanceCount;
event TransferLockedToken(address indexed from, address indexed to, uint256 value, uint256 releaseTime);
event ReleaseLockedBalance(address indexed owner, uint256 value, uint256 releaseTime);
// 给 _to 转移 _value 个锁定到 _releaseTime 的 token
function transferLockedToken(address _to, uint256 _value, uint256 _releaseTime) nonReentrant returns (bool) {
require(_releaseTime > now);
require(_releaseTime.sub(1 years) < now);
balances[msg.sender] = balances[msg.sender].sub(_value);
lockedBalances[lockedBalanceCount] = LockedBalance({owner: _to, value: _value, releaseTime: _releaseTime});
lockedBalanceCount++;
TransferLockedToken(msg.sender, _to, _value, _releaseTime);
return true;
}
// 查 address 的锁定余额
function lockedBalanceOf(address _owner) constant returns (uint256 value) {
for (uint i = 0; i < lockedBalanceCount; i++) {
LockedBalance lockedBalance = lockedBalances[i];
if (_owner == lockedBalance.owner) {
value = value.add(lockedBalance.value);
}
}
return value;
}
// 解锁所有已到锁定时间的 token
function releaseLockedBalance () returns (uint256 releaseAmount) {
uint index = 0;
while (index < lockedBalanceCount) {
if (now >= lockedBalances[index].releaseTime) {
releaseAmount += lockedBalances[index].value;
unlockBalanceByIndex(index);
} else {
index++;
}
}
return releaseAmount;
}
function unlockBalanceByIndex (uint index) internal {
LockedBalance lockedBalance = lockedBalances[index];
balances[lockedBalance.owner] = balances[lockedBalance.owner].add(lockedBalance.value);
ReleaseLockedBalance(lockedBalance.owner, lockedBalance.value, lockedBalance.releaseTime);
lockedBalances[index] = lockedBalances[lockedBalanceCount - 1];
delete lockedBalances[lockedBalanceCount - 1];
lockedBalanceCount--;
}
}
library DateTime {
/*
* Date and Time utilities for ethereum contracts
*
*/
struct DateTime {
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 (DateTime 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 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;
}
}
contract ReleaseableToken is Operational, LockableToken {
using SafeMath for uint;
using DateTime for uint256;
bool secondYearUpdate = false; // Limit 更新到第二年
uint256 public releasedSupply; // 已释放的数量
uint256 public createTime; // 合约创建时间
uint256 standardDecimals = 100000000; // 由于有8位小数,传进来的参数都是不带后面的小数,要有乘100000000的操作才能保证数量级一致
uint256 public totalSupply = standardDecimals.mul(1000000000); // 总量10亿
uint256 public limitSupplyPerYear = standardDecimals.mul(60000000); // 每年释放的LLT的限额,第一年6000万
uint256 public dailyLimit = standardDecimals.mul(1000000); // 每天释放的限额
event ReleaseSupply(address receiver, uint256 value, uint256 releaseTime);
event UnfreezeAmount(address receiver, uint256 amount, uint256 unfreezeTime);
struct FrozenRecord {
uint256 amount; // 冻结的数量
uint256 unfreezeTime; // 解冻的时间
}
mapping (uint => FrozenRecord) public frozenRecords;
uint public frozenRecordsCount = 0;
function ReleaseableToken(
uint256 initialSupply,
uint256 initReleasedSupply,
address operator
) Operational(operator) {
totalSupply = initialSupply;
releasedSupply = initReleasedSupply;
createTime = now;
balances[msg.sender] = initReleasedSupply;
}
// 在 timestamp 时间点释放 releaseAmount 的 token
function releaseSupply(uint256 releaseAmount, uint256 timestamp) onlyOperator returns(uint256 _actualRelease) {
require(timestamp >= createTime && timestamp <= now);
require(!judgeReleaseRecordExist(timestamp));
require(releaseAmount <= dailyLimit);
updateLimit();
require(limitSupplyPerYear > 0);
if (releaseAmount > limitSupplyPerYear) {
if (releasedSupply.add(limitSupplyPerYear) > totalSupply) {
releasedSupply = totalSupply;
releaseAmount = totalSupply.sub(releasedSupply);
} else {
releasedSupply = releasedSupply.add(limitSupplyPerYear);
releaseAmount = limitSupplyPerYear;
}
limitSupplyPerYear = 0;
} else {
if (releasedSupply.add(releaseAmount) > totalSupply) {
releasedSupply = totalSupply;
releaseAmount = totalSupply.sub(releasedSupply);
} else {
releasedSupply = releasedSupply.add(releaseAmount);
}
limitSupplyPerYear = limitSupplyPerYear.sub(releaseAmount);
}
frozenRecords[frozenRecordsCount] = FrozenRecord(releaseAmount, timestamp.add(26 * 1 weeks));
frozenRecordsCount++;
ReleaseSupply(msg.sender, releaseAmount, timestamp);
return releaseAmount;
}
// 判断 timestamp 这一天有没有已经释放的记录
function judgeReleaseRecordExist(uint256 timestamp) internal returns(bool _exist) {
bool exist = false;
if (frozenRecordsCount > 0) {
for (uint index = 0; index < frozenRecordsCount; index++) {
if ((frozenRecords[index].unfreezeTime.parseTimestamp().year == (timestamp.add(26 * 1 weeks)).parseTimestamp().year)
&& (frozenRecords[index].unfreezeTime.parseTimestamp().month == (timestamp.add(26 * 1 weeks)).parseTimestamp().month)
&& (frozenRecords[index].unfreezeTime.parseTimestamp().day == (timestamp.add(26 * 1 weeks)).parseTimestamp().day)) {
exist = true;
}
}
}
return exist;
}
// 更新每年释放token的限制数量
function updateLimit() internal {
if (createTime.add(1 years) < now && !secondYearUpdate) {
limitSupplyPerYear = standardDecimals.mul(120000000);
secondYearUpdate = true;
}
if (createTime.add(2 * 1 years) < now) {
if (releasedSupply < totalSupply) {
limitSupplyPerYear = totalSupply.sub(releasedSupply);
}
}
}
// 解冻 releaseSupply 中释放的 token
function unfreeze() onlyOperator returns(uint256 _unfreezeAmount) {
uint256 unfreezeAmount = 0;
uint index = 0;
while (index < frozenRecordsCount) {
if (frozenRecords[index].unfreezeTime < now) {
unfreezeAmount += frozenRecords[index].amount;
unfreezeByIndex(index);
} else {
index++;
}
}
return unfreezeAmount;
}
function unfreezeByIndex (uint index) internal {
FrozenRecord unfreezeRecord = frozenRecords[index];
balances[owner] = balances[owner].add(unfreezeRecord.amount);
UnfreezeAmount(owner, unfreezeRecord.amount, unfreezeRecord.unfreezeTime);
frozenRecords[index] = frozenRecords[frozenRecordsCount - 1];
delete frozenRecords[frozenRecordsCount - 1];
frozenRecordsCount--;
}
// 设置每天释放 token 的限额
function setDailyLimit(uint256 _dailyLimit) onlyOwner {
dailyLimit = _dailyLimit;
}
}
contract LLToken is ReleaseableToken {
string public standard = '2017082602';
string public name = 'LLToken';
string public symbol = 'LLT';
uint8 public decimals = 8;
function LLToken(
uint256 initialSupply,
uint256 initReleasedSupply,
address operator
) ReleaseableToken(initialSupply, initReleasedSupply, operator) {}
}
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