/**
 * Source Code first verified at https://etherscan.io on Monday, November 26, 2018
 (UTC) */

pragma solidity ^0.5.1;

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) {
                return a / b;
        }

        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 ERCBasic {
        event Transfer(address indexed from, address indexed to, uint256 value);

        function totalSupply () public view returns (uint256);
        function balanceOf (address who) public view returns (uint256);
        function transfer (address to, uint256 value) public returns (bool);
}

contract ERC is ERCBasic {
        event Approval(address indexed owner, address indexed spender, uint256 value);

        function transferFrom (address from, address to, uint256 value) public returns (bool);
        function allowance (address owner, address spender) public view returns (uint256);
        function approve (address spender, uint256 value) public returns (bool);
}

contract Ownable {
        
        address payable internal owner;
        address internal foundationOwner;

        constructor () public {
                owner = msg.sender;
                foundationOwner = owner;
        }

        modifier onlyOwner () {
                require(msg.sender == owner);
                _;
        }

        modifier hasMintability () {
                require(msg.sender == owner || msg.sender == foundationOwner);
                _;
        }

      
}

contract Pausable is Ownable {
        event ContractPause();
        event ContractResume();
        event ContractPauseSchedule(uint256 from, uint256 to);

        uint256 internal pauseFrom;
        uint256 internal pauseTo;

        modifier whenRunning () {
                require(now < pauseFrom || now > pauseTo);
                _;
        }

        modifier whenPaused () {
                require(now >= pauseFrom && now <= pauseTo);
                _;
        }

        function pause () public onlyOwner {
                pauseFrom = now - 1;
                pauseTo = now + 30000 days;
                emit ContractPause();
        }

        function pause (uint256 from, uint256 to) public onlyOwner {
                require(to > from);
                pauseFrom = from;
                pauseTo = to;
                emit ContractPauseSchedule(from, to);
        }

        function resume () public onlyOwner {
                pauseFrom = now - 2;
                pauseTo = now - 1;
                emit ContractResume();
        }
}

contract TokenForge is Ownable {
        event ForgeStart();
        event ForgeStop();

        bool public forge_running = true;

        modifier canForge () {
                require(forge_running);
                _;
        }

        modifier cannotForge () {
                require(!forge_running);
                _;
        }

        function startForge () public onlyOwner cannotForge returns (bool) {
                forge_running = true;
                emit ForgeStart();
                return true;
        }

        function stopForge () public onlyOwner canForge returns (bool) {
                forge_running = false;
                emit ForgeStop();
                return true;
        }
}

contract CappedToken is Ownable {
        using SafeMath for uint256;

        uint256 public token_cap;
        uint256 public token_created;
        uint256 public token_foundation_cap;
        uint256 public token_foundation_created;


        constructor (uint256 _cap, uint256 _foundationCap) public {
                token_cap = _cap;
                token_foundation_cap = _foundationCap;
        }

        function changeCap (uint256 _cap) public onlyOwner returns (bool) {
                if (_cap < token_created && _cap > 0) return false;
                token_cap = _cap;
                return true;
        }

        function canMint (uint256 amount) public view returns (bool) {
                return (token_cap == 0) || (token_created.add(amount) <= token_cap);
        }
        
        function canMintFoundation(uint256 amount) internal view returns(bool) {
                return(token_foundation_created.add(amount) <= token_foundation_cap);
        }
}

contract BasicToken is ERCBasic, Pausable {
        using SafeMath for uint256;

        mapping(address => uint256) public wallets;

        modifier canTransfer (address _from, address _to, uint256 amount) {
                require((_from != address(0)) && (_to != address(0)));
                require(_from != _to);
                require(amount > 0);
                _;
        }

        function balanceOf (address user) public view returns (uint256) {
                return wallets[user];
        }
}

contract DelegatableToken is ERC, BasicToken {
        using SafeMath for uint256;

        mapping(address => mapping(address => uint256)) public warrants;

        function allowance (address owner, address delegator) public view returns (uint256) {
                return warrants[owner][delegator];
        }

        function approve (address delegator, uint256 value) public whenRunning returns (bool) {
                if (delegator == msg.sender) return true;
                warrants[msg.sender][delegator] = value;
                emit Approval(msg.sender, delegator, value);
                return true;
        }

        function increaseApproval (address delegator, uint256 delta) public whenRunning returns (bool) {
                if (delegator == msg.sender) return true;
                uint256 value = warrants[msg.sender][delegator].add(delta);
                warrants[msg.sender][delegator] = value;
                emit Approval(msg.sender, delegator, value);
                return true;
        }

        function decreaseApproval (address delegator, uint256 delta) public whenRunning returns (bool) {
                if (delegator == msg.sender) return true;
                uint256 value = warrants[msg.sender][delegator];
                if (value < delta) {
                        value = 0;
                }
                else {
                        value = value.sub(delta);
                }
                warrants[msg.sender][delegator] = value;
                emit Approval(msg.sender, delegator, value);
                return true;
        }
}

contract LockableProtocol is BasicToken {
        function invest (address investor, uint256 amount) public returns (bool);
        function getInvestedToken (address investor) public view returns (uint256);
        function getLockedToken (address investor) public view returns (uint256);
        function availableWallet (address user) public view returns (uint256) {
                return wallets[user].sub(getLockedToken(user));
        }
}

contract MintAndBurnToken is TokenForge, CappedToken, LockableProtocol {
        using SafeMath for uint256;
        
        event Mint(address indexed user, uint256 amount);
        event Burn(address indexed user, uint256 amount);

        constructor (uint256 _initial, uint256 _cap, uint256 _qnetCap) public CappedToken(_cap, _qnetCap) {
                token_created = _initial;
                wallets[msg.sender] = _initial;

        emit Mint(msg.sender, _initial);
        emit Transfer(address(0), msg.sender, _initial);
        }

        function totalSupply () public view returns (uint256) {
                return token_created;
        }

        function totalQnetSupply() public view returns(uint256) {
                return token_foundation_created;
        }

        function mint (address target, uint256 amount) public hasMintability whenRunning canForge returns (bool) {
                require(target != owner && target != foundationOwner);
                require(canMint(amount));

        if (msg.sender == foundationOwner) {
                require(canMintFoundation(amount));
                token_foundation_created = token_foundation_created.add(amount);
        }
        
        token_created = token_created.add(amount);
        wallets[target] = wallets[target].add(amount);

        emit Mint(target, amount);
        emit Transfer(address(0), target, amount);
        return true;
        }

        function burn (uint256 amount) public whenRunning canForge returns (bool) {
                uint256 balance = availableWallet(msg.sender);
                require(amount <= balance);

        token_created = token_created.sub(amount);
        wallets[msg.sender] -= amount;

        emit Burn(msg.sender, amount);
        emit Transfer(msg.sender, address(0), amount);

        return true;
        }
}

contract LockableToken is MintAndBurnToken, DelegatableToken {
        using SafeMath for uint256;

        struct LockBin {
                uint256 start;
                uint256 finish;
                uint256 duration;
                uint256 amount;
        }

        event InvestStart();
        event InvestStop();
        event NewInvest(uint256 release_start, uint256 release_duration);

        uint256 public releaseStart;
        uint256 public releaseDuration;
        bool public forceStopInvest;
        mapping(address => mapping(uint => LockBin)) public lockbins;

        modifier canInvest () {
                require(!forceStopInvest);
                _;
        }

        constructor (uint256 _initial, uint256 _cap, uint256 _qnetCap) public MintAndBurnToken(_initial, _cap, _qnetCap) {
                forceStopInvest = true;
        }

        function pauseInvest () public onlyOwner whenRunning returns (bool) {
                require(!forceStopInvest);
                forceStopInvest = true;
                emit InvestStop();
                return true;
        }

        function resumeInvest () public onlyOwner whenRunning returns (bool) {
                require(forceStopInvest);
                forceStopInvest = false;
                emit InvestStart();
                return true;
        }

        function setInvest (uint256 release_start, uint256 release_duration) public onlyOwner whenRunning returns (bool) {
                releaseStart = release_start;
                releaseDuration = release_duration;
                forceStopInvest = false;

        emit NewInvest(release_start, release_duration);
        return true;
        }

        function invest (address investor, uint256 amount) public onlyOwner whenRunning canInvest returns (bool) {
                require(investor != address(0));
                require(investor != owner);
                require(investor != foundationOwner);
                require(amount > 0);
                require(canMint(amount));

        mapping(uint => LockBin) storage locks = lockbins[investor];
        LockBin storage info = locks[0];
        uint index = info.amount + 1;
        locks[index] = LockBin({
                start: releaseStart,
                finish: releaseStart + releaseDuration,
                duration: releaseDuration / (1 days),
                amount: amount
        });
        info.amount = index;

        token_created = token_created.add(amount);
        wallets[investor] = wallets[investor].add(amount);
        emit Mint(investor, amount);
        emit Transfer(address(0), investor, amount);

        return true;
        }

        function batchInvest (address[] memory investors, uint256 amount) public onlyOwner whenRunning canInvest returns (bool) {
                require(amount > 0);

        uint investorsLength = investors.length;
        uint investorsCount = 0;
        uint i;
        address r;
        for (i = 0; i < investorsLength; i ++) {
                r = investors[i];
                if (r == address(0) || r == owner || r == foundationOwner) continue;
                investorsCount ++;
        }
        require(investorsCount > 0);

        uint256 totalAmount = amount.mul(uint256(investorsCount));
        require(canMint(totalAmount));

        token_created = token_created.add(totalAmount);

        for (i = 0; i < investorsLength; i ++) {
                r = investors[i];
                if (r == address(0) || r == owner || r == foundationOwner) continue;

        mapping(uint => LockBin) storage locks = lockbins[r];
        LockBin storage info = locks[0];
        uint index = info.amount + 1;
        locks[index] = LockBin({
                start: releaseStart,
                finish: releaseStart + releaseDuration,
                duration: releaseDuration / (1 days),
                amount: amount
        });
        info.amount = index;

        wallets[r] = wallets[r].add(amount);
        emit Mint(r, amount);
        emit Transfer(address(0), r, amount);
        }

        return true;
        }

        function batchInvests (address[] memory investors, uint256[] memory amounts) public onlyOwner whenRunning canInvest returns (bool) {
                uint investorsLength = investors.length;
                require(investorsLength == amounts.length);

        uint investorsCount = 0;
        uint256 totalAmount = 0;
        uint i;
        address r;
        for (i = 0; i < investorsLength; i ++) {
                r = investors[i];
                if (r == address(0) || r == owner) continue;
                investorsCount ++;
                totalAmount += amounts[i];
        }
        require(totalAmount > 0);
        require(canMint(totalAmount));

        uint256 amount;
        token_created = token_created.add(totalAmount);
        for (i = 0; i < investorsLength; i ++) {
                r = investors[i];
                if (r == address(0) || r == owner) continue;
                amount = amounts[i];
                wallets[r] = wallets[r].add(amount);
                emit Mint(r, amount);
                emit Transfer(address(0), r, amount);

        mapping(uint => LockBin) storage locks = lockbins[r];
        LockBin storage info = locks[0];
        uint index = info.amount + 1;
        locks[index] = LockBin({
                start: releaseStart,
                finish: releaseStart + releaseDuration,
                duration: releaseDuration / (1 days),
                amount: amount
        });
        info.amount = index;
        }

        return true;
        }

        function getInvestedToken (address investor) public view returns (uint256) {
                require(investor != address(0) && investor != owner && investor != foundationOwner);

        mapping(uint => LockBin) storage locks = lockbins[investor];
        uint256 balance = 0;
        uint l = locks[0].amount;
        for (uint i = 1; i <= l; i ++) {
                LockBin memory bin = locks[i];
                balance = balance.add(bin.amount);
        }
        return balance;
        }

        function getLockedToken (address investor) public view returns (uint256) {
                require(investor != address(0) && investor != owner && investor != foundationOwner);

        mapping(uint => LockBin) storage locks = lockbins[investor];
        uint256 balance = 0;
        uint256 d = 1;
        uint l = locks[0].amount;
        for (uint i = 1; i <= l; i ++) {
                LockBin memory bin = locks[i];
                if (now <= bin.start) {
                        balance = balance.add(bin.amount);
                }
                else if (now < bin.finish) {
                        d = (now - bin.start) / (1 days);
                        balance = balance.add(bin.amount - bin.amount * d / bin.duration);
                }
        }
        return balance;
        }

        function canPay (address user, uint256 amount) internal view returns (bool) {
                uint256 balance = availableWallet(user);
                return amount <= balance;
        }

        function transfer (address target, uint256 value) public whenRunning canTransfer(msg.sender, target, value) returns (bool) {
                require(target != owner);
                require(canPay(msg.sender, value));

        wallets[msg.sender] = wallets[msg.sender].sub(value);
        wallets[target] = wallets[target].add(value);
        emit Transfer(msg.sender, target, value);
        return true;
        }


        function batchTransfer (address[] memory receivers, uint256 amount) public whenRunning returns (bool) {
                require(amount > 0);

        uint receiveLength = receivers.length;
        uint receiverCount = 0;
        uint i;
        address r;
        for (i = 0; i < receiveLength; i ++) {
                r = receivers[i];
                if (r == address(0) || r == owner) continue;
                receiverCount ++;
        }
        require(receiverCount > 0);

        uint256 totalAmount = amount.mul(uint256(receiverCount));
        require(canPay(msg.sender, totalAmount));

        wallets[msg.sender] -= totalAmount;
        for (i = 0; i < receiveLength; i++) {
                r = receivers[i];
                if (r == address(0) || r == owner) continue;
                wallets[r] = wallets[r].add(amount);
                emit Transfer(msg.sender, r, amount);
        }
        return true;
        }

        function batchTransfers (address[] memory receivers, uint256[] memory amounts) public whenRunning returns (bool) {
                uint receiveLength = receivers.length;
                require(receiveLength == amounts.length);

        uint receiverCount = 0;
        uint256 totalAmount = 0;
        uint i;
        address r;
        for (i = 0; i < receiveLength; i ++) {
                r = receivers[i];
                if (r == address(0) || r == owner) continue;
                receiverCount ++;
                totalAmount += amounts[i];
        }
        require(totalAmount > 0);
        require(canPay(msg.sender, totalAmount));

        wallets[msg.sender] -= totalAmount;
        uint256 amount;
        for (i = 0; i < receiveLength; i++) {
                r = receivers[i];
                if (r == address(0) || r == owner) continue;
                amount = amounts[i];
                if (amount == 0) continue;
                wallets[r] = wallets[r].add(amount);
                emit Transfer(msg.sender, r, amount);
        }
        return true;
        }

        function transferFrom (address from, address to, uint256 value) public whenRunning canTransfer(from, to, value) returns (bool) {
                require(from != owner);
                require(to != owner);
                require(canPay(from, value));

        uint256 warrant;
        if (msg.sender != from) {
                warrant = warrants[from][msg.sender];
                require(value <= warrant);
                warrants[from][msg.sender] = warrant.sub(value);
        }

        wallets[from] = wallets[from].sub(value);
        wallets[to] = wallets[to].add(value);
        emit Transfer(from, to, value);
        return true;
        }

        function batchTransferFrom (address from, address[] memory  receivers, uint256 amount) public whenRunning returns (bool) {
                require(from != address(0) && from != owner);
                require(amount > 0);

        uint receiveLength = receivers.length;
        uint receiverCount = 0;
        uint i;
        address r;
        for (i = 0; i < receiveLength; i ++) {
                r = receivers[i];
                if (r == address(0) || r == owner) continue;
                receiverCount ++;
        }
        require(receiverCount > 0);

        uint256 totalAmount = amount.mul(uint256(receiverCount));
        require(canPay(from, totalAmount));

        uint256 warrant;
        if (msg.sender != from) {
                warrant = warrants[from][msg.sender];
                require(totalAmount <= warrant);
                warrants[from][msg.sender] = warrant.sub(totalAmount);
        }

        wallets[from] -= totalAmount;
        for (i = 0; i < receiveLength; i++) {
                r = receivers[i];
                if (r == address(0) || r == owner) continue;
                wallets[r] = wallets[r].add(amount);
                emit Transfer(from, r, amount);
        }
        return true;
        }

        function batchTransferFroms (address from, address[] memory receivers, uint256[] memory amounts) public whenRunning returns (bool) {
                require(from != address(0) && from != owner);

        uint receiveLength = receivers.length;
        require(receiveLength == amounts.length);

        uint receiverCount = 0;
        uint256 totalAmount = 0;
        uint i;
        address r;
        for (i = 0; i < receiveLength; i ++) {
                r = receivers[i];
                if (r == address(0) || r == owner) continue;
                receiverCount ++;
                totalAmount += amounts[i];
        }
        require(totalAmount > 0);
        require(canPay(from, totalAmount));

        uint256 warrant;
        if (msg.sender != from) {
                warrant = warrants[from][msg.sender];
                require(totalAmount <= warrant);
                warrants[from][msg.sender] = warrant.sub(totalAmount);
        }

        wallets[from] -= totalAmount;
        uint256 amount;
        for (i = 0; i < receiveLength; i++) {
                r = receivers[i];
                if (r == address(0) || r == owner) continue;
                amount = amounts[i];
                if (amount == 0) continue;
                wallets[r] = wallets[r].add(amount);
                emit Transfer(from, r, amount);
        }
        return true;
        }
}

contract DaccToken is LockableToken {
        string  public constant name     = "Distributed Adult Art & Culture";
        string  public constant symbol   = "DACC";
        uint8   public constant decimals = 18;

        uint256 private constant TOKEN_CAP     = 1000000000 * 10 ** uint256(decimals);
        uint256 private constant TOKEN_FOUNDATION_CAP = 1000000000   * 10 ** uint256(decimals);
        uint256 private constant TOKEN_INITIAL = 0   * 10 ** uint256(decimals);

        constructor () public LockableToken(TOKEN_INITIAL, TOKEN_CAP, TOKEN_FOUNDATION_CAP) {
        }

        
 	    function suicideQent () public onlyOwner{
             selfdestruct(owner);
        }
        
}