Contract Source Code:
File 1 of 1 : QKL
pragma solidity ^0.4.13;
contract ERC20Basic {
uint256 public totalSupply;
function balanceOf(address who) public view returns (uint256);
function transfer(address to, uint256 value) public returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
}
contract ERC20 is ERC20Basic {
function allowance(address owner, address spender) public view 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 Ownable {
address public owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
function Ownable() public {
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) public onlyOwner {
require(newOwner != address(0));
OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
}
library SafeMath {
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
assert(c / a == b);
return c;
}
function div(uint256 a, uint256 b) internal pure 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 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 Pausable is Ownable {
event Pause();
event Unpause();
bool public paused = false;
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*/
modifier whenNotPaused() {
require(!paused);
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*/
modifier whenPaused() {
require(paused);
_;
}
/**
* @dev called by the owner to pause, triggers stopped state
*/
function pause() onlyOwner whenNotPaused public {
paused = true;
Pause();
}
/**
* @dev called by the owner to unpause, returns to normal state
*/
function unpause() onlyOwner whenPaused public {
paused = false;
Unpause();
}
}
contract QKL is ERC20,Pausable{
using SafeMath for uint256;
string public constant name="QKL";
string public symbol="QKL";
string public constant version = "1.0";
uint256 public constant decimals = 18;
uint256 public totalSupply;
uint256 public constant INIT_SUPPLY=10000000000*10**decimals;
//锁仓期数
struct epoch {
uint256 lockEndTime;
uint256 lockAmount;
}
mapping(address=>epoch[]) public lockEpochsMap;
mapping(address => uint256) balances;
mapping (address => mapping (address => uint256)) allowed;
event GetETH(address indexed _from, uint256 _value);
event Burn(address indexed burner, uint256 value);
//owner一次性获取代币
function QKL(){
totalSupply=INIT_SUPPLY;
balances[msg.sender] = INIT_SUPPLY;
Transfer(0x0, msg.sender, INIT_SUPPLY);
}
/**
*销毁代币,用户只能自己销毁自己的
*/
function burn(uint256 _value) public {
require(_value > 0);
address burner = msg.sender;
balances[burner] = balances[burner].sub(_value);
totalSupply = totalSupply.sub(_value);
Burn(burner, _value);
}
//锁仓接口,可分多期锁仓,多期锁仓金额可累加,这里的锁仓是指限制转账
function lockBalance(address user, uint256 lockAmount,uint256 lockEndTime) external
onlyOwner
{
epoch[] storage epochs = lockEpochsMap[user];
epochs.push(epoch(lockEndTime,lockAmount));
}
//允许用户往合约账户打币
function () payable external
{
GetETH(msg.sender,msg.value);
}
function etherProceeds() external
onlyOwner
{
if(!msg.sender.send(this.balance)) revert();
}
function transfer(address _to, uint256 _value) whenNotPaused public returns (bool)
{
require(_to != address(0));
//计算锁仓份额
epoch[] epochs = lockEpochsMap[msg.sender];
uint256 needLockBalance = 0;
for(uint256 i = 0;i<epochs.length;i++)
{
//如果当前时间小于当期结束时间,则此期有效
if( now < epochs[i].lockEndTime )
{
needLockBalance=needLockBalance.add(epochs[i].lockAmount);
}
}
require(balances[msg.sender].sub(_value)>=needLockBalance);
// 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;
}
function balanceOf(address _owner) public constant returns (uint256 balance)
{
return balances[_owner];
}
function transferFrom(address _from, address _to, uint256 _value) whenNotPaused public returns (bool)
{
require(_to != address(0));
//计算锁仓份额
epoch[] epochs = lockEpochsMap[_from];
uint256 needLockBalance = 0;
for(uint256 i = 0;i<epochs.length;i++)
{
//如果当前时间小于当期结束时间,则此期有效
if( now < epochs[i].lockEndTime )
{
needLockBalance = needLockBalance.add(epochs[i].lockAmount);
}
}
require(balances[_from].sub(_value)>=needLockBalance);
uint256 _allowance = allowed[_from][msg.sender];
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;
}
function approve(address _spender, uint256 _value) public returns (bool)
{
allowed[msg.sender][_spender] = _value;
Approval(msg.sender, _spender, _value);
return true;
}
function allowance(address _owner, address _spender) public constant returns (uint256 remaining)
{
return allowed[_owner][_spender];
}
}