/**
 * This smart contract code is Copyright 2017 TokenMarket Ltd. For more information see https://tokenmarket.net
 *
 * Licensed under the Apache License, version 2.0: https://github.com/TokenMarketNet/ico/blob/master/LICENSE.txt
 */

pragma solidity ^0.4.11;



/**
 * Math operations with safety checks
 */
contract SafeMath {
    function safeMul(uint a, uint b) internal returns (uint) {
        uint c = a * b;
        assert(a == 0 || c / a == b);
        return c;
    }

    function safeDiv(uint a, uint b) internal returns (uint) {
        assert(b > 0);
        uint c = a / b;
        assert(a == b * c + a % b);
        return c;
    }

    function safeSub(uint a, uint b) internal returns (uint) {
        assert(b <= a);
        return a - b;
    }

    function safeAdd(uint a, uint b) internal returns (uint) {
        uint c = a + b;
        assert(c>=a && c>=b);
        return c;
    }

    function max64(uint64 a, uint64 b) internal constant returns (uint64) {
        return a >= b ? a : b;
    }

    function min64(uint64 a, uint64 b) internal constant returns (uint64) {
        return a < b ? a : b;
    }

    function max256(uint256 a, uint256 b) internal constant returns (uint256) {
        return a >= b ? a : b;
    }

    function min256(uint256 a, uint256 b) internal constant returns (uint256) {
        return a < b ? a : b;
    }

}
/**
 * This smart contract code is Copyright 2017 TokenMarket Ltd. For more information see https://tokenmarket.net
 *
 * Licensed under the Apache License, version 2.0: https://github.com/TokenMarketNet/ico/blob/master/LICENSE.txt
 */


/**
 * @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;


    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() {
        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 public {
        require(newOwner != address(0));
        OwnershipTransferred(owner, newOwner);
        owner = newOwner;
    }

}


// Created using ICO Wizard https://github.com/oraclesorg/ico-wizard by Oracles Network

/*
 * Haltable
 *
 * Abstract contract that allows children to implement an
 * emergency stop mechanism. Differs from Pausable by causing a throw when in halt mode.
 *
 *
 * Originally envisioned in FirstBlood ICO contract.
 */
contract Haltable is Ownable {
    bool public halted;

    modifier stopInEmergency {
        if (halted) throw;
        _;
    }

    modifier stopNonOwnersInEmergency {
        if (halted && msg.sender != owner) throw;
        _;
    }

    modifier onlyInEmergency {
        if (!halted) throw;
        _;
    }

    // called by the owner on emergency, triggers stopped state
    function halt() external onlyOwner {
        halted = true;
    }

    // called by the owner on end of emergency, returns to normal state
    function unhalt() external onlyOwner onlyInEmergency {
        halted = false;
    }

}


/**
 * This smart contract code is Copyright 2017 TokenMarket Ltd. For more information see https://tokenmarket.net
 *
 * Licensed under the Apache License, version 2.0: https://github.com/TokenMarketNet/ico/blob/master/LICENSE.txt
 */

/**
 * @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) public constant returns (uint256);
    function transfer(address to, uint256 value) public returns (bool);
    event Transfer(address indexed from, address indexed to, uint256 value);
}



/**
 * This smart contract code is Copyright 2017 TokenMarket Ltd. For more information see https://tokenmarket.net
 *
 * Licensed under the Apache License, version 2.0: https://github.com/TokenMarketNet/ico/blob/master/LICENSE.txt
 */



/**
 * @title ERC20 interface
 * @dev see https://github.com/ethereum/EIPs/issues/20
 */
contract ERC20 is ERC20Basic {
    function allowance(address owner, address spender) public constant 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);
}



/**
 * Standard ERC20 token with Short Hand Attack and approve() race condition mitigation.
 *
 * Based on code by FirstBlood:
 * https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol
 */
contract StandardToken is ERC20, SafeMath {

    /* Token supply got increased and a new owner received these tokens */
    event Minted(address receiver, uint amount);

    /* Actual balances of token holders */
    mapping(address => uint) balances;

    /* approve() allowances */
    mapping (address => mapping (address => uint)) allowed;

    /* Interface declaration */
    function isToken() public constant returns (bool weAre) {
        return true;
    }

    function transfer(address _to, uint _value) returns (bool success) {
        balances[msg.sender] = safeSub(balances[msg.sender], _value);
        balances[_to] = safeAdd(balances[_to], _value);
        Transfer(msg.sender, _to, _value);
        return true;
    }

    function transferFrom(address _from, address _to, uint _value) returns (bool success) {
        uint _allowance = allowed[_from][msg.sender];

        balances[_to] = safeAdd(balances[_to], _value);
        balances[_from] = safeSub(balances[_from], _value);
        allowed[_from][msg.sender] = safeSub(_allowance, _value);
        Transfer(_from, _to, _value);
        return true;
    }

    function balanceOf(address _owner) constant returns (uint balance) {
        return balances[_owner];
    }

    function approve(address _spender, uint _value) returns (bool success) {

        // 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;
    }

    function allowance(address _owner, address _spender) constant returns (uint remaining) {
        return allowed[_owner][_spender];
    }

}

/**
 * This smart contract code is Copyright 2017 TokenMarket Ltd. For more information see https://tokenmarket.net
 *
 * Licensed under the Apache License, version 2.0: https://github.com/TokenMarketNet/ico/blob/master/LICENSE.txt
 */





/**
 * This smart contract code is Copyright 2017 TokenMarket Ltd. For more information see https://tokenmarket.net
 *
 * Licensed under the Apache License, version 2.0: https://github.com/TokenMarketNet/ico/blob/master/LICENSE.txt
 */



/**
 * Upgrade agent interface inspired by Lunyr.
 *
 * Upgrade agent transfers tokens to a new contract.
 * Upgrade agent itself can be the token contract, or just a middle man contract doing the heavy lifting.
 */
contract UpgradeAgent {

    uint public originalSupply;

    /** Interface marker */
    function isUpgradeAgent() public constant returns (bool) {
        return true;
    }

    function upgradeFrom(address _from, uint256 _value) public;

}


/**
 * A token upgrade mechanism where users can opt-in amount of tokens to the next smart contract revision.
 *
 * First envisioned by Golem and Lunyr projects.
 */
contract UpgradeableToken is StandardToken {

    /** Contract / person who can set the upgrade path. This can be the same as team multisig wallet, as what it is with its default value. */
    address public upgradeMaster;

    /** The next contract where the tokens will be migrated. */
    UpgradeAgent public upgradeAgent;

    /** How many tokens we have upgraded by now. */
    uint256 public totalUpgraded;

    /**
     * Upgrade states.
     *
     * - NotAllowed: The child contract has not reached a condition where the upgrade can bgun
     * - WaitingForAgent: Token allows upgrade, but we don't have a new agent yet
     * - ReadyToUpgrade: The agent is set, but not a single token has been upgraded yet
     * - Upgrading: Upgrade agent is set and the balance holders can upgrade their tokens
     *
     */
    enum UpgradeState {Unknown, NotAllowed, WaitingForAgent, ReadyToUpgrade, Upgrading}

    /**
     * Somebody has upgraded some of his tokens.
     */
    event Upgrade(address indexed _from, address indexed _to, uint256 _value);

    /**
     * New upgrade agent available.
     */
    event UpgradeAgentSet(address agent);

    /**
     * Do not allow construction without upgrade master set.
     */
    function UpgradeableToken(address _upgradeMaster) {
        upgradeMaster = _upgradeMaster;
    }

    /**
     * Allow the token holder to upgrade some of their tokens to a new contract.
     */
    function upgrade(uint256 value) public {

        UpgradeState state = getUpgradeState();
        require(!(state == UpgradeState.ReadyToUpgrade || state == UpgradeState.Upgrading));

        // Validate input value.
        require (value == 0);

        balances[msg.sender] = safeSub(balances[msg.sender], value);

        // Take tokens out from circulation
        totalSupply = safeSub(totalSupply, value);
        totalUpgraded = safeAdd(totalUpgraded, value);

        // Upgrade agent reissues the tokens
        upgradeAgent.upgradeFrom(msg.sender, value);
        Upgrade(msg.sender, upgradeAgent, value);
    }

    /**
     * Set an upgrade agent that handles
     */
    function setUpgradeAgent(address agent) external {

        require(!canUpgrade()); // The token is not yet in a state that we could think upgrading;

        require(agent == 0x0);
        // Only a master can designate the next agent
        require(msg.sender != upgradeMaster);
        // Upgrade has already begun for an agent
        require(getUpgradeState() == UpgradeState.Upgrading);

        upgradeAgent = UpgradeAgent(agent);

        // Bad interface
        require(!upgradeAgent.isUpgradeAgent());
        // Make sure that token supplies match in source and target
        require(upgradeAgent.originalSupply() != totalSupply);

        UpgradeAgentSet(upgradeAgent);
    }

    /**
     * Get the state of the token upgrade.
     */
    function getUpgradeState() public constant returns(UpgradeState) {
        if(!canUpgrade()) return UpgradeState.NotAllowed;
        else if(address(upgradeAgent) == 0x00) return UpgradeState.WaitingForAgent;
        else if(totalUpgraded == 0) return UpgradeState.ReadyToUpgrade;
        else return UpgradeState.Upgrading;
    }

    /**
     * Change the upgrade master.
     *
     * This allows us to set a new owner for the upgrade mechanism.
     */
    function setUpgradeMaster(address master) public {
        require(master == 0x0);
        require(msg.sender != upgradeMaster);
        upgradeMaster = master;
    }

    /**
     * Child contract can enable to provide the condition when the upgrade can begun.
     */
    function canUpgrade() public constant returns(bool) {
        return true;
    }

}

/**
 * This smart contract code is Copyright 2017 TokenMarket Ltd. For more information see https://tokenmarket.net
 *
 * Licensed under the Apache License, version 2.0: https://github.com/TokenMarketNet/ico/blob/master/LICENSE.txt
 */




/**
 * A token that can increase its supply by another contract.
 *
 * This allows uncapped crowdsale by dynamically increasing the supply when money pours in.
 * Only mint agents, contracts whitelisted by owner, can mint new tokens.
 *
 */
contract MintableTokenExt is StandardToken, Ownable {

    using SMathLib for uint;

    bool public mintingFinished = false;

    /** List of agents that are allowed to create new tokens */
    mapping (address => bool) public mintAgents;

    event MintingAgentChanged(address addr, bool state  );

    /** inPercentageUnit is percents of tokens multiplied to 10 up to percents decimals.
    * For example, for reserved tokens in percents 2.54%
    * inPercentageUnit = 254
    * inPercentageDecimals = 2
    */
    struct ReservedTokensData {
        uint inTokens;
        uint inPercentageUnit;
        uint inPercentageDecimals;
    }

    mapping (address => ReservedTokensData) public reservedTokensList;
    address[] public reservedTokensDestinations;
    uint public reservedTokensDestinationsLen = 0;

    function setReservedTokensList(address addr, uint inTokens, uint inPercentageUnit, uint inPercentageDecimals) onlyOwner {
        reservedTokensDestinations.push(addr);
        reservedTokensDestinationsLen++;
        reservedTokensList[addr] = ReservedTokensData({inTokens:inTokens, inPercentageUnit:inPercentageUnit, inPercentageDecimals: inPercentageDecimals});
    }

    function getReservedTokensListValInTokens(address addr) constant returns (uint inTokens) {
        return reservedTokensList[addr].inTokens;
    }

    function getReservedTokensListValInPercentageUnit(address addr) constant returns (uint inPercentageUnit) {
        return reservedTokensList[addr].inPercentageUnit;
    }

    function getReservedTokensListValInPercentageDecimals(address addr) constant returns (uint inPercentageDecimals) {
        return reservedTokensList[addr].inPercentageDecimals;
    }

    function setReservedTokensListMultiple(address[] addrs, uint[] inTokens, uint[] inPercentageUnit, uint[] inPercentageDecimals) onlyOwner {
        for (uint iterator = 0; iterator < addrs.length; iterator++) {
            setReservedTokensList(addrs[iterator], inTokens[iterator], inPercentageUnit[iterator], inPercentageDecimals[iterator]);
        }
    }

    /**
     * Create new tokens and allocate them to an address..
     *
     * Only callably by a crowdsale contract (mint agent).
     */
    function mint(address receiver, uint amount) onlyMintAgent canMint public {
        totalSupply = totalSupply.plus(amount);
        balances[receiver] = balances[receiver].plus(amount);

        // This will make the mint transaction apper in EtherScan.io
        // We can remove this after there is a standardized minting event
        Transfer(0, receiver, amount);
    }

    /**
     * Owner can allow a crowdsale contract to mint new tokens.
     */
    function setMintAgent(address addr, bool state) onlyOwner canMint public {
        mintAgents[addr] = state;
        MintingAgentChanged(addr, state);
    }

    modifier onlyMintAgent() {
        // Only crowdsale contracts are allowed to mint new tokens
        if(!mintAgents[msg.sender]) {
            revert();
        }
        _;
    }

    /** Make sure we are not done yet. */
    modifier canMint() {
        if(mintingFinished) {
            revert();
        }
        _;
    }
}
/**
 * This smart contract code is Copyright 2017 TokenMarket Ltd. For more information see https://tokenmarket.net
 *
 * Licensed under the Apache License, version 2.0: https://github.com/TokenMarketNet/ico/blob/master/LICENSE.txt
 */



/**
 * Define interface for releasing the token transfer after a successful crowdsale.
 */
contract ReleasableToken is ERC20, Ownable {

    /* The finalizer contract that allows unlift the transfer limits on this token */
    address public releaseAgent;

    /** A crowdsale contract can release us to the wild if ICO success. If false we are are in transfer lock up period.*/
    bool public released = false;

    /** Map of agents that are allowed to transfer tokens regardless of the lock down period. These are crowdsale contracts and possible the team multisig itself. */
    mapping (address => bool) public transferAgents;

    /**
     * Limit token transfer until the crowdsale is over.
     *
     */
    modifier canTransfer(address _sender) {

        if(!released) {
            if(!transferAgents[_sender]) {
                revert();
            }
        }

        _;
    }

    /**
     * Set the contract that can call release and make the token transferable.
     *
     * Design choice. Allow reset the release agent to fix fat finger mistakes.
     */
    function setReleaseAgent(address addr) onlyOwner inReleaseState(false) public {

        // We don't do interface check here as we might want to a normal wallet address to act as a release agent
        releaseAgent = addr;
    }

    /**
     * Owner can allow a particular address (a crowdsale contract) to transfer tokens despite the lock up period.
     */
    function setTransferAgent(address addr, bool state) onlyOwner inReleaseState(false) public {
        transferAgents[addr] = state;
    }

    /**
     * One way function to release the tokens to the wild.
     *
     * Can be called only from the release agent that is the final ICO contract. It is only called if the crowdsale has been success (first milestone reached).
     */
    function releaseTokenTransfer() public onlyReleaseAgent {
        released = true;
    }

    /** The function can be called only before or after the tokens have been releasesd */
    modifier inReleaseState(bool releaseState) {
        if(releaseState != released) {
            revert();
        }
        _;
    }

    /** The function can be called only by a whitelisted release agent. */
    modifier onlyReleaseAgent() {
        if(msg.sender != releaseAgent) {
            revert();
        }
        _;
    }

    function transfer(address _to, uint _value) canTransfer(msg.sender) returns (bool success) {
        // Call StandardToken.transfer()
        return super.transfer(_to, _value);
    }

    function transferFrom(address _from, address _to, uint _value) canTransfer(_from) returns (bool success) {
        // Call StandardToken.transferForm()
        return super.transferFrom(_from, _to, _value);
    }

}

/**
 * This smart contract code is Copyright 2017 TokenMarket Ltd. For more information see https://tokenmarket.net
 *
 * Licensed under the Apache License, version 2.0: https://github.com/TokenMarketNet/ico/blob/master/LICENSE.txt
 */






contract BurnableToken is StandardToken {

    using SMathLib for uint;
    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 {
        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].minus(_value);
        totalSupply = totalSupply.minus(_value);
        Burn(burner, _value);
    }
}




/**
 * A crowdsaled token.
 *
 * An ERC-20 token designed specifically for crowdsales with investor protection and further development path.
 *
 * - The token transfer() is disabled until the crowdsale is over
 * - The token contract gives an opt-in upgrade path to a new contract
 * - The same token can be part of several crowdsales through approve() mechanism
 * - The token can be capped (supply set in the constructor) or uncapped (crowdsale contract can mint new tokens)
 *
 */
contract CrowdsaleTokenExt is ReleasableToken, MintableTokenExt, BurnableToken, UpgradeableToken {

    /** Name and symbol were updated. */
    event UpdatedTokenInformation(string newName, string newSymbol);

    string public name;

    string public symbol;

    uint public decimals;

    /* Minimum ammount of tokens every buyer can buy. */
    uint public minCap;


    /**
     * Construct the token.
     *
     * This token must be created through a team multisig wallet, so that it is owned by that wallet.
     *
     * @param _name Token name
     * @param _symbol Token symbol - should be all caps
     * @param _initialSupply How many tokens we start with
     * @param _decimals Number of decimal places
     * @param _mintable Are new tokens created over the crowdsale or do we distribute only the initial supply? Note that when the token becomes transferable the minting always ends.
     */
    function CrowdsaleTokenExt(string _name, string _symbol, uint _initialSupply, uint _decimals, bool _mintable, uint _globalMinCap)
    UpgradeableToken(msg.sender) {

        // Create any address, can be transferred
        // to team multisig via changeOwner(),
        // also remember to call setUpgradeMaster()
        owner = msg.sender;

        name = _name;
        symbol = _symbol;

        totalSupply = _initialSupply;

        decimals = _decimals;

        minCap = _globalMinCap;

        // Create initially all balance on the team multisig
        balances[owner] = totalSupply;

        if(totalSupply > 0) {
            Minted(owner, totalSupply);
        }

        // No more new supply allowed after the token creation
        if(!_mintable) {
            mintingFinished = true;
            if(totalSupply == 0) {
                revert(); // Cannot create a token without supply and no minting
            }
        }
    }

    /**
     * When token is released to be transferable, enforce no new tokens can be created.
     */
    function releaseTokenTransfer() public onlyReleaseAgent {
        super.releaseTokenTransfer();
    }

    /**
     * Allow upgrade agent functionality kick in only if the crowdsale was success.
     */
    function canUpgrade() public constant returns(bool) {
        return released && super.canUpgrade();
    }

    /**
     * Owner can update token information here.
     *
     * It is often useful to conceal the actual token association, until
     * the token operations, like central issuance or reissuance have been completed.
     *
     * This function allows the token owner to rename the token after the operations
     * have been completed and then point the audience to use the token contract.
     */
    function setTokenInformation(string _name, string _symbol) onlyOwner {
        name = _name;
        symbol = _symbol;

        UpdatedTokenInformation(name, symbol);
    }

}


contract MjtToken is CrowdsaleTokenExt {

    uint public ownersProductCommissionInPerc = 5;

    uint public operatorProductCommissionInPerc = 25;

    event IndependentSellerJoined(address sellerWallet, uint amountOfTokens, address operatorWallet);
    event OwnersProductAdded(address ownersWallet, uint amountOfTokens, address operatorWallet);
    event OperatorProductCommissionChanged(uint _value);
    event OwnersProductCommissionChanged(uint _value);


    function setOperatorCommission(uint _value) public onlyOwner {
        require(_value >= 0);
        operatorProductCommissionInPerc = _value;
        OperatorProductCommissionChanged(_value);
    }

    function setOwnersCommission(uint _value) public onlyOwner {
        require(_value >= 0);
        ownersProductCommissionInPerc = _value;
        OwnersProductCommissionChanged(_value);
    }


    /**
     * Method called when new seller joined the program
     * To avoid value lost after division, amountOfTokens must be multiple of 100
     */
    function independentSellerJoined(address sellerWallet, uint amountOfTokens, address operatorWallet) public onlyOwner canMint {
        require(amountOfTokens > 100);
        require(sellerWallet != address(0));
        require(operatorWallet != address(0));

        uint operatorCommission = amountOfTokens.divides(100).times(operatorProductCommissionInPerc);
        uint sellerAmount = amountOfTokens.minus(operatorCommission);

        if (operatorCommission > 0) {
            mint(operatorWallet, operatorCommission);
        }

        if (sellerAmount > 0) {
            mint(sellerWallet, sellerAmount);
        }
        IndependentSellerJoined(sellerWallet, amountOfTokens, operatorWallet);
    }


    /**
    * Method called when owners add their own product
    * To avoid value lost after division, amountOfTokens must be multiple of 100
    */
    function ownersProductAdded(address ownersWallet, uint amountOfTokens, address operatorWallet) public onlyOwner canMint {
        require(amountOfTokens > 100);
        require(ownersWallet != address(0));
        require(operatorWallet != address(0));

        uint ownersComission = amountOfTokens.divides(100).times(ownersProductCommissionInPerc);
        uint operatorAmount = amountOfTokens.minus(ownersComission);


        if (ownersComission > 0) {
            mint(ownersWallet, ownersComission);
        }

        if (operatorAmount > 0) {
            mint(operatorWallet, operatorAmount);
        }

        OwnersProductAdded(ownersWallet, amountOfTokens, operatorWallet);
    }

    function MjtToken(string _name, string _symbol, uint _initialSupply, uint _decimals, bool _mintable, uint _globalMinCap)
    CrowdsaleTokenExt(_name, _symbol, _initialSupply, _decimals, _mintable, _globalMinCap) {}

}




/**
 * Finalize agent defines what happens at the end of succeseful crowdsale.
 *
 * - Allocate tokens for founders, bounties and community
 * - Make tokens transferable
 * - etc.
 */
contract FinalizeAgent {

    function isFinalizeAgent() public constant returns(bool) {
        return true;
    }

    /** Return true if we can run finalizeCrowdsale() properly.
     *
     * This is a safety check function that doesn't allow crowdsale to begin
     * unless the finalizer has been set up properly.
     */
    function isSane() public constant returns (bool);

    /** Called once by crowdsale finalize() if the sale was success. */
    function finalizeCrowdsale();

}

/**
 * This smart contract code is Copyright 2017 TokenMarket Ltd. For more information see https://tokenmarket.net
 *
 * Licensed under the Apache License, version 2.0: https://github.com/TokenMarketNet/ico/blob/master/LICENSE.txt
 */


/**
 * Interface for defining crowdsale pricing.
 */
contract PricingStrategy {

    /** Interface declaration. */
    function isPricingStrategy() public constant returns (bool) {
        return true;
    }

    /** Self check if all references are correctly set.
     *
     * Checks that pricing strategy matches crowdsale parameters.
     */
    function isSane(address crowdsale) public constant returns (bool) {
        return true;
    }

    /**
     * @dev Pricing tells if this is a presale purchase or not.
       @param purchaser Address of the purchaser
       @return False by default, true if a presale purchaser
     */
    function isPresalePurchase(address purchaser) public constant returns (bool) {
        return false;
    }

    /**
     * When somebody tries to buy tokens for X eth, calculate how many tokens they get.
     *
     *
     * @param value - What is the value of the transaction send in as wei
     * @param tokensSold - how much tokens have been sold this far
     * @param weiRaised - how much money has been raised this far in the main token sale - this number excludes presale
     * @param msgSender - who is the investor of this transaction
     * @param decimals - how many decimal units the token has
     * @return Amount of tokens the investor receives
     */
    function calculatePrice(uint value, uint weiRaised, uint tokensSold, address msgSender, uint decimals) public constant returns (uint tokenAmount);
}



/// @dev Time milestone based pricing with special support for pre-ico deals.
contract MilestonePricing is PricingStrategy, Ownable {

    using SMathLib for uint;

    uint public constant MAX_MILESTONE = 10;

    // This contains all pre-ICO addresses, and their prices (weis per token)
    mapping (address => uint) public preicoAddresses;

    /**
    * Define pricing schedule using milestones.
    */
    struct Milestone {

        // UNIX timestamp when this milestone kicks in
        uint time;

        // How many tokens per satoshi you will get after this milestone has been passed
        uint price;
    }

    // Store milestones in a fixed array, so that it can be seen in a blockchain explorer
    // Milestone 0 is always (0, 0)
    // (TODO: change this when we confirm dynamic arrays are explorable)
    Milestone[10] public milestones;

    // How many active milestones we have
    uint public milestoneCount;

    /// @dev Contruction, creating a list of milestones
    /// @param _milestones uint[] milestones Pairs of (time, price)
    function MilestonePricing(uint[] _milestones) {
        // Need to have tuples, length check
        if(_milestones.length % 2 == 1 || _milestones.length >= MAX_MILESTONE*2) {
            throw;
        }

        milestoneCount = _milestones.length / 2;

        uint lastTimestamp = 0;

        for(uint i=0; i<_milestones.length/2; i++) {
            milestones[i].time = _milestones[i*2];
            milestones[i].price = _milestones[i*2+1];

            // No invalid steps
            if((lastTimestamp != 0) && (milestones[i].time <= lastTimestamp)) {
                throw;
            }

            lastTimestamp = milestones[i].time;
        }

        // Last milestone price must be zero, terminating the crowdale
        if(milestones[milestoneCount-1].price != 0) {
            throw;
        }
    }

    /// @dev This is invoked once for every pre-ICO address, set pricePerToken
    ///      to 0 to disable
    /// @param preicoAddress PresaleFundCollector address
    /// @param pricePerToken How many weis one token cost for pre-ico investors
    function setPreicoAddress(address preicoAddress, uint pricePerToken)
    public
    onlyOwner
    {
        preicoAddresses[preicoAddress] = pricePerToken;
    }

    /// @dev Iterate through milestones. You reach end of milestones when price = 0
    /// @return tuple (time, price)
    function getMilestone(uint n) public constant returns (uint, uint) {
        return (milestones[n].time, milestones[n].price);
    }

    function getFirstMilestone() private constant returns (Milestone) {
        return milestones[0];
    }

    function getLastMilestone() private constant returns (Milestone) {
        return milestones[milestoneCount-1];
    }

    function getPricingStartsAt() public constant returns (uint) {
        return getFirstMilestone().time;
    }

    function getPricingEndsAt() public constant returns (uint) {
        return getLastMilestone().time;
    }

    function isSane(address _crowdsale) public constant returns(bool) {
        CrowdsaleExt crowdsale = CrowdsaleExt(_crowdsale);
        return crowdsale.startsAt() == getPricingStartsAt() && crowdsale.endsAt() == getPricingEndsAt();
    }

    /// @dev Get the current milestone or bail out if we are not in the milestone periods.
    /// @return {[type]} [description]
    function getCurrentMilestone() private constant returns (Milestone) {
        uint i;

        for(i=0; i<milestones.length; i++) {
            if(now < milestones[i].time) {
                return milestones[i-1];
            }
        }
    }

    /// @dev Get the current price.
    /// @return The current price or 0 if we are outside milestone period
    function getCurrentPrice() public constant returns (uint result) {
        return getCurrentMilestone().price;
    }

    /// @dev Calculate the current price for buy in amount.
    function calculatePrice(uint value, uint weiRaised, uint tokensSold, address msgSender, uint decimals) public constant returns (uint) {

        uint multiplier = 10 ** decimals;

        // This investor is coming through pre-ico
        if(preicoAddresses[msgSender] > 0) {
            return value.times(multiplier) / preicoAddresses[msgSender];
        }

        uint price = getCurrentPrice();
        return value.times(multiplier) / price;
    }

    function isPresalePurchase(address purchaser) public constant returns (bool) {
        if(preicoAddresses[purchaser] > 0)
            return true;
        else
            return false;
    }

    function() payable {
        throw; // No money on this contract
    }

}



/**
 * A token that defines fractional units as decimals.
 */
contract FractionalERC20Ext is ERC20 {

    uint public decimals;
    uint public minCap;

}



/**
 * Abstract base contract for token sales.
 *
 * Handle
 * - start and end dates
 * - accepting investments
 * - minimum funding goal and refund
 * - various statistics during the crowdfund
 * - different pricing strategies
 * - different investment policies (require server side customer id, allow only whitelisted addresses)
 *
 */
contract CrowdsaleExt is Haltable {

    /* Max investment count when we are still allowed to change the multisig address */
    uint public MAX_INVESTMENTS_BEFORE_MULTISIG_CHANGE = 5;

    using SMathLib for uint;

    /* The token we are selling */
    FractionalERC20Ext public token;

    /* How we are going to price our offering */
    MilestonePricing public pricingStrategy;

    /* Post-success callback */
    FinalizeAgent public finalizeAgent;

    /* tokens will be transfered from this address */
    address public multisigWallet;

    /* if the funding goal is not reached, investors may withdraw their funds */
    uint public minimumFundingGoal;

    /* the UNIX timestamp start date of the crowdsale */
    uint public startsAt;

    /* the UNIX timestamp end date of the crowdsale */
    uint public endsAt;

    /* the number of tokens already sold through this contract*/
    uint public tokensSold = 0;

    /* How many wei of funding we have raised */
    uint public weiRaised = 0;

    /* Calculate incoming funds from presale contracts and addresses */
    uint public presaleWeiRaised = 0;

    /* How many distinct addresses have invested */
    uint public investorCount = 0;

    /* How much wei we have returned back to the contract after a failed crowdfund. */
    uint public loadedRefund = 0;

    /* How much wei we have given back to investors.*/
    uint public weiRefunded = 0;

    /* Has this crowdsale been finalized */
    bool public finalized;

    /* Do we need to have unique contributor id for each customer */
    bool public requireCustomerId;

    bool public isWhiteListed;

    address[] public joinedCrowdsales;
    uint public joinedCrowdsalesLen = 0;

    address public lastCrowdsale;

    /**
      * Do we verify that contributor has been cleared on the server side (accredited investors only).
      * This method was first used in FirstBlood crowdsale to ensure all contributors have accepted terms on sale (on the web).
      */
    bool public requiredSignedAddress;

    /* Server side address that signed allowed contributors (Ethereum addresses) that can participate the crowdsale */
    address public signerAddress;

    /** How much ETH each address has invested to this crowdsale */
    mapping (address => uint256) public investedAmountOf;

    /** How much tokens this crowdsale has credited for each investor address */
    mapping (address => uint256) public tokenAmountOf;

    struct WhiteListData {
        bool status;
        uint minCap;
        uint maxCap;
    }

    //is crowdsale updatable
    bool public isUpdatable;

    /** Addresses that are allowed to invest even before ICO offical opens. For testing, for ICO partners, etc. */
    mapping (address => WhiteListData) public earlyParticipantWhitelist;

    /** This is for manul testing for the interaction from owner wallet. You can set it to any value and inspect this in blockchain explorer to see that crowdsale interaction works. */
    uint public ownerTestValue;

    /** State machine
     *
     * - Preparing: All contract initialization calls and variables have not been set yet
     * - Prefunding: We have not passed start time yet
     * - Funding: Active crowdsale
     * - Success: Minimum funding goal reached
     * - Failure: Minimum funding goal not reached before ending time
     * - Finalized: The finalized has been called and succesfully executed
     * - Refunding: Refunds are loaded on the contract for reclaim.
     */
    enum State{Unknown, Preparing, PreFunding, Funding, Success, Failure, Finalized, Refunding}

    // A new investment was made
    event Invested(address investor, uint weiAmount, uint tokenAmount, uint128 customerId);

    // Refund was processed for a contributor
    event Refund(address investor, uint weiAmount);

    // The rules were changed what kind of investments we accept
    event InvestmentPolicyChanged(bool newRequireCustomerId, bool newRequiredSignedAddress, address newSignerAddress);

    // Address early participation whitelist status changed
    event Whitelisted(address addr, bool status);

    // Crowdsale start time has been changed
    event StartsAtChanged(uint newStartsAt);

    // Crowdsale end time has been changed
    event EndsAtChanged(uint newEndsAt);

    function CrowdsaleExt(address _token, MilestonePricing _pricingStrategy, address _multisigWallet, uint _start, uint _end, uint _minimumFundingGoal, bool _isUpdatable, bool _isWhiteListed) {

        owner = msg.sender;

        token = FractionalERC20Ext(_token);

        setPricingStrategy(_pricingStrategy);

        multisigWallet = _multisigWallet;
        if(multisigWallet == 0) {
            throw;
        }

        if(_start == 0) {
            throw;
        }

        startsAt = _start;

        if(_end == 0) {
            throw;
        }

        endsAt = _end;

        // Don't mess the dates
        if(startsAt >= endsAt) {
            throw;
        }

        // Minimum funding goal can be zero
        minimumFundingGoal = _minimumFundingGoal;

        isUpdatable = _isUpdatable;

        isWhiteListed = _isWhiteListed;
    }

    /**
     * Don't expect to just send in money and get tokens.
     */
    function() payable {
        throw;
    }

    /**
     * Make an investment.
     *
     * Crowdsale must be running for one to invest.
     * We must have not pressed the emergency brake.
     *
     * @param receiver The Ethereum address who receives the tokens
     * @param customerId (optional) UUID v4 to track the successful payments on the server side
     *
     */
    function investInternal(address receiver, uint128 customerId) stopInEmergency private {

        // Determine if it's a good time to accept investment from this participant
        if(getState() == State.PreFunding) {
            // Are we whitelisted for early deposit
            throw;
        } else if(getState() == State.Funding) {
            // Retail participants can only come in when the crowdsale is running
            // pass
            if(isWhiteListed) {
                if(!earlyParticipantWhitelist[receiver].status) {
                    throw;
                }
            }
        } else {
            // Unwanted state
            throw;
        }

        uint weiAmount = msg.value;

        // Account presale sales separately, so that they do not count against pricing tranches
        uint tokenAmount = pricingStrategy.calculatePrice(weiAmount, weiRaised - presaleWeiRaised, tokensSold, msg.sender, token.decimals());

        if(tokenAmount == 0) {
            // Dust transaction
            throw;
        }

        if(isWhiteListed) {
            if(tokenAmount < earlyParticipantWhitelist[receiver].minCap && tokenAmountOf[receiver] == 0) {
                // tokenAmount < minCap for investor
                throw;
            }
            if(tokenAmount > earlyParticipantWhitelist[receiver].maxCap) {
                // tokenAmount > maxCap for investor
                throw;
            }

            // Check that we did not bust the investor's cap
            if (isBreakingInvestorCap(receiver, tokenAmount)) {
                throw;
            }
        } else {
            if(tokenAmount < token.minCap() && tokenAmountOf[receiver] == 0) {
                throw;
            }
        }

        if(investedAmountOf[receiver] == 0) {
            // A new investor
            investorCount++;
        }

        // Update investor
        investedAmountOf[receiver] = investedAmountOf[receiver].plus(weiAmount);
        tokenAmountOf[receiver] = tokenAmountOf[receiver].plus(tokenAmount);

        // Update totals
        weiRaised = weiRaised.plus(weiAmount);
        tokensSold = tokensSold.plus(tokenAmount);

        if(pricingStrategy.isPresalePurchase(receiver)) {
            presaleWeiRaised = presaleWeiRaised.plus(weiAmount);
        }

        // Check that we did not bust the cap
        if(isBreakingCap(weiAmount, tokenAmount, weiRaised, tokensSold)) {
            throw;
        }

        assignTokens(receiver, tokenAmount);

        // Pocket the money
        if(!multisigWallet.send(weiAmount)) throw;

        if (isWhiteListed) {
            uint num = 0;
            for (var i = 0; i < joinedCrowdsalesLen; i++) {
                if (this == joinedCrowdsales[i])
                    num = i;
            }

            if (num + 1 < joinedCrowdsalesLen) {
                for (var j = num + 1; j < joinedCrowdsalesLen; j++) {
                    CrowdsaleExt crowdsale = CrowdsaleExt(joinedCrowdsales[j]);
                    crowdsale.updateEarlyParicipantWhitelist(msg.sender, this, tokenAmount);
                }
            }
        }

        // Tell us invest was success
        Invested(receiver, weiAmount, tokenAmount, customerId);
    }

    /**
     * Preallocate tokens for the early investors.
     *
     * Preallocated tokens have been sold before the actual crowdsale opens.
     * This function mints the tokens and moves the crowdsale needle.
     *
     * Investor count is not handled; it is assumed this goes for multiple investors
     * and the token distribution happens outside the smart contract flow.
     *
     * No money is exchanged, as the crowdsale team already have received the payment.
     *
     * @param fullTokens tokens as full tokens - decimal places added internally
     * @param weiPrice Price of a single full token in wei
     *
     */
    function preallocate(address receiver, uint fullTokens, uint weiPrice) public onlyOwner {

        uint tokenAmount = fullTokens * 10**token.decimals();
        uint weiAmount = weiPrice * fullTokens; // This can be also 0, we give out tokens for free

        weiRaised = weiRaised.plus(weiAmount);
        tokensSold = tokensSold.plus(tokenAmount);

        investedAmountOf[receiver] = investedAmountOf[receiver].plus(weiAmount);
        tokenAmountOf[receiver] = tokenAmountOf[receiver].plus(tokenAmount);

        assignTokens(receiver, tokenAmount);

        // Tell us invest was success
        Invested(receiver, weiAmount, tokenAmount, 0);
    }

    /**
     * Allow anonymous contributions to this crowdsale.
     */
    function investWithSignedAddress(address addr, uint128 customerId, uint8 v, bytes32 r, bytes32 s) public payable {
        bytes32 hash = sha256(addr);
        if (ecrecover(hash, v, r, s) != signerAddress) throw;
        if(customerId == 0) throw;  // UUIDv4 sanity check
        investInternal(addr, customerId);
    }

    /**
     * Track who is the customer making the payment so we can send thank you email.
     */
    function investWithCustomerId(address addr, uint128 customerId) public payable {
        if(requiredSignedAddress) throw; // Crowdsale allows only server-side signed participants
        if(customerId == 0) throw;  // UUIDv4 sanity check
        investInternal(addr, customerId);
    }

    /**
     * Allow anonymous contributions to this crowdsale.
     */
    function invest(address addr) public payable {
        if(requireCustomerId) throw; // Crowdsale needs to track participants for thank you email
        if(requiredSignedAddress) throw; // Crowdsale allows only server-side signed participants
        investInternal(addr, 0);
    }

    /**
     * Invest to tokens, recognize the payer and clear his address.
     *
     */
    function buyWithSignedAddress(uint128 customerId, uint8 v, bytes32 r, bytes32 s) public payable {
        investWithSignedAddress(msg.sender, customerId, v, r, s);
    }

    /**
     * Invest to tokens, recognize the payer.
     *
     */
    function buyWithCustomerId(uint128 customerId) public payable {
        investWithCustomerId(msg.sender, customerId);
    }

    /**
     * The basic entry point to participate the crowdsale process.
     *
     * Pay for funding, get invested tokens back in the sender address.
     */
    function buy() public payable {
        invest(msg.sender);
    }

    /**
     * Finalize a succcesful crowdsale.
     *
     * The owner can triggre a call the contract that provides post-crowdsale actions, like releasing the tokens.
     */
    function finalize() public inState(State.Success) onlyOwner stopInEmergency {

        // Already finalized
        if(finalized) {
            throw;
        }

        // Finalizing is optional. We only call it if we are given a finalizing agent.
        if(address(finalizeAgent) != 0) {
            finalizeAgent.finalizeCrowdsale();
        }

        finalized = true;
    }

    /**
     * Allow to (re)set finalize agent.
     *
     * Design choice: no state restrictions on setting this, so that we can fix fat finger mistakes.
     */
    function setFinalizeAgent(FinalizeAgent addr) onlyOwner {
        finalizeAgent = addr;

        // Don't allow setting bad agent
        if(!finalizeAgent.isFinalizeAgent()) {
            throw;
        }
    }

    /**
     * Set policy do we need to have server-side customer ids for the investments.
     *
     */
    function setRequireCustomerId(bool value) onlyOwner {
        requireCustomerId = value;
        InvestmentPolicyChanged(requireCustomerId, requiredSignedAddress, signerAddress);
    }

    /**
     * Set policy if all investors must be cleared on the server side first.
     *
     * This is e.g. for the accredited investor clearing.
     *
     */
    function setRequireSignedAddress(bool value, address _signerAddress) onlyOwner {
        requiredSignedAddress = value;
        signerAddress = _signerAddress;
        InvestmentPolicyChanged(requireCustomerId, requiredSignedAddress, signerAddress);
    }

    /**
     * Allow addresses to do early participation.
     *
     * TODO: Fix spelling error in the name
     */
    function setEarlyParicipantWhitelist(address addr, bool status, uint minCap, uint maxCap) onlyOwner {
        if (!isWhiteListed) throw;
        earlyParticipantWhitelist[addr] = WhiteListData({status:status, minCap:minCap, maxCap:maxCap});
        Whitelisted(addr, status);
    }

    function setEarlyParicipantsWhitelist(address[] addrs, bool[] statuses, uint[] minCaps, uint[] maxCaps) onlyOwner {
        if (!isWhiteListed) throw;
        for (uint iterator = 0; iterator < addrs.length; iterator++) {
            setEarlyParicipantWhitelist(addrs[iterator], statuses[iterator], minCaps[iterator], maxCaps[iterator]);
        }
    }

    function updateEarlyParicipantWhitelist(address addr, address contractAddr, uint tokensBought) {
        if (tokensBought < earlyParticipantWhitelist[addr].minCap) throw;
        if (!isWhiteListed) throw;
        if (addr != msg.sender && contractAddr != msg.sender) throw;
        uint newMaxCap = earlyParticipantWhitelist[addr].maxCap;
        newMaxCap = newMaxCap.minus(tokensBought);
        earlyParticipantWhitelist[addr] = WhiteListData({status:earlyParticipantWhitelist[addr].status, minCap:0, maxCap:newMaxCap});
    }

    function updateJoinedCrowdsales(address addr) onlyOwner {
        joinedCrowdsales[joinedCrowdsalesLen++] = addr;
    }

    function setLastCrowdsale(address addr) onlyOwner {
        lastCrowdsale = addr;
    }

    function clearJoinedCrowdsales() onlyOwner {
        joinedCrowdsalesLen = 0;
    }

    function updateJoinedCrowdsalesMultiple(address[] addrs) onlyOwner {
        clearJoinedCrowdsales();
        for (uint iter = 0; iter < addrs.length; iter++) {
            if(joinedCrowdsalesLen == joinedCrowdsales.length) {
                joinedCrowdsales.length += 1;
            }
            joinedCrowdsales[joinedCrowdsalesLen++] = addrs[iter];
            if (iter == addrs.length - 1)
                setLastCrowdsale(addrs[iter]);
        }
    }

    function setStartsAt(uint time) onlyOwner {
        if (finalized) throw;

        if (!isUpdatable) throw;

        if(now > time) {
            throw; // Don't change past
        }

        if(time > endsAt) {
            throw;
        }

        CrowdsaleExt lastCrowdsaleCntrct = CrowdsaleExt(lastCrowdsale);
        if (lastCrowdsaleCntrct.finalized()) throw;

        startsAt = time;
        StartsAtChanged(startsAt);
    }

    /**
     * Allow crowdsale owner to close early or extend the crowdsale.
     *
     * This is useful e.g. for a manual soft cap implementation:
     * - after X amount is reached determine manual closing
     *
     * This may put the crowdsale to an invalid state,
     * but we trust owners know what they are doing.
     *
     */
    function setEndsAt(uint time) onlyOwner {
        if (finalized) throw;

        if (!isUpdatable) throw;

        if(now > time) {
            throw; // Don't change past
        }

        if(startsAt > time) {
            throw;
        }

        CrowdsaleExt lastCrowdsaleCntrct = CrowdsaleExt(lastCrowdsale);
        if (lastCrowdsaleCntrct.finalized()) throw;

        uint num = 0;
        for (var i = 0; i < joinedCrowdsalesLen; i++) {
            if (this == joinedCrowdsales[i])
                num = i;
        }

        if (num + 1 < joinedCrowdsalesLen) {
            for (var j = num + 1; j < joinedCrowdsalesLen; j++) {
                CrowdsaleExt crowdsale = CrowdsaleExt(joinedCrowdsales[j]);
                if (time > crowdsale.startsAt()) throw;
            }
        }

        endsAt = time;
        EndsAtChanged(endsAt);
    }

    /**
     * Allow to (re)set pricing strategy.
     *
     * Design choice: no state restrictions on the set, so that we can fix fat finger mistakes.
     */
    function setPricingStrategy(MilestonePricing _pricingStrategy) onlyOwner {
        pricingStrategy = _pricingStrategy;

        // Don't allow setting bad agent
        if(!pricingStrategy.isPricingStrategy()) {
            throw;
        }
    }

    /**
     * Allow to change the team multisig address in the case of emergency.
     *
     * This allows to save a deployed crowdsale wallet in the case the crowdsale has not yet begun
     * (we have done only few test transactions). After the crowdsale is going
     * then multisig address stays locked for the safety reasons.
     */
    function setMultisig(address addr) public onlyOwner {

        // Change
        if(investorCount > MAX_INVESTMENTS_BEFORE_MULTISIG_CHANGE) {
            throw;
        }

        multisigWallet = addr;
    }

    /**
     * Allow load refunds back on the contract for the refunding.
     *
     * The team can transfer the funds back on the smart contract in the case the minimum goal was not reached..
     */
    function loadRefund() public payable inState(State.Failure) {
        if(msg.value == 0) throw;
        loadedRefund = loadedRefund.plus(msg.value);
    }

    /**
     * Investors can claim refund.
     *
     * Note that any refunds from proxy buyers should be handled separately,
     * and not through this contract.
     */
    function refund() public inState(State.Refunding) {
        uint256 weiValue = investedAmountOf[msg.sender];
        if (weiValue == 0) throw;
        investedAmountOf[msg.sender] = 0;
        weiRefunded = weiRefunded.plus(weiValue);
        Refund(msg.sender, weiValue);
        if (!msg.sender.send(weiValue)) throw;
    }

    /**
     * @return true if the crowdsale has raised enough money to be a successful.
     */
    function isMinimumGoalReached() public constant returns (bool reached) {
        return weiRaised >= minimumFundingGoal;
    }

    /**
     * Check if the contract relationship looks good.
     */
    function isFinalizerSane() public constant returns (bool sane) {
        return finalizeAgent.isSane();
    }

    /**
     * Check if the contract relationship looks good.
     */
    function isPricingSane() public constant returns (bool sane) {
        return pricingStrategy.isSane(address(this));
    }

    /**
     * Crowdfund state machine management.
     *
     * We make it a function and do not assign the result to a variable, so there is no chance of the variable being stale.
     */
    function getState() public constant returns (State) {
        if(finalized) return State.Finalized;
        else if (address(finalizeAgent) == 0) return State.Preparing;
        else if (!finalizeAgent.isSane()) return State.Preparing;
        else if (!pricingStrategy.isSane(address(this))) return State.Preparing;
        else if (block.timestamp < startsAt) return State.PreFunding;
        else if (block.timestamp <= endsAt && !isCrowdsaleFull()) return State.Funding;
        else if (isMinimumGoalReached()) return State.Success;
        else if (!isMinimumGoalReached() && weiRaised > 0 && loadedRefund >= weiRaised) return State.Refunding;
        else return State.Failure;
    }

    /** This is for manual testing of multisig wallet interaction */
    function setOwnerTestValue(uint val) onlyOwner {
        ownerTestValue = val;
    }

    /** Interface marker. */
    function isCrowdsale() public constant returns (bool) {
        return true;
    }

    //
    // Modifiers
    //

    /** Modified allowing execution only if the crowdsale is currently running.  */
    modifier inState(State state) {
        if(getState() != state) throw;
        _;
    }


    //
    // Abstract functions
    //

    /**
     * Check if the current invested breaks our cap rules.
     *
     *
     * The child contract must define their own cap setting rules.
     * We allow a lot of flexibility through different capping strategies (ETH, token count)
     * Called from invest().
     *
     * @param weiAmount The amount of wei the investor tries to invest in the current transaction
     * @param tokenAmount The amount of tokens we try to give to the investor in the current transaction
     * @param weiRaisedTotal What would be our total raised balance after this transaction
     * @param tokensSoldTotal What would be our total sold tokens count after this transaction
     *
     * @return true if taking this investment would break our cap rules
     */
    function isBreakingCap(uint weiAmount, uint tokenAmount, uint weiRaisedTotal, uint tokensSoldTotal) constant returns (bool limitBroken);

    function isBreakingInvestorCap(address receiver, uint tokenAmount) constant returns (bool limitBroken);

    /**
     * Check if the current crowdsale is full and we can no longer sell any tokens.
     */
    function isCrowdsaleFull() public constant returns (bool);

    /**
     * Create new tokens or transfer issued tokens to the investor depending on the cap model.
     */
    function assignTokens(address receiver, uint tokenAmount) private;
}


/**
 * This smart contract code is Copyright 2017 TokenMarket Ltd. For more information see https://tokenmarket.net
 *
 * Licensed under the Apache License, version 2.0: https://github.com/TokenMarketNet/ico/blob/master/LICENSE.txt
 */


contract MintedTokenCappedCrowdsaleExt is CrowdsaleExt {

    /* Maximum amount of tokens this crowdsale can sell. */
    uint public maximumSellableTokens;

    function MintedTokenCappedCrowdsaleExt(address _token, MilestonePricing _pricingStrategy, address _multisigWallet, uint _start, uint _end, uint _minimumFundingGoal, uint _maximumSellableTokens, bool _isUpdatable, bool _isWhiteListed) CrowdsaleExt(_token, _pricingStrategy, _multisigWallet, _start, _end, _minimumFundingGoal, _isUpdatable, _isWhiteListed) {
        maximumSellableTokens = _maximumSellableTokens;
    }

    // Crowdsale maximumSellableTokens has been changed
    event MaximumSellableTokensChanged(uint newMaximumSellableTokens);

    /**
     * Called from invest() to confirm if the curret investment does not break our cap rule.
     */
    function isBreakingCap(uint weiAmount, uint tokenAmount, uint weiRaisedTotal, uint tokensSoldTotal) constant returns (bool limitBroken) {
        return tokensSoldTotal > maximumSellableTokens;
    }

    function isBreakingInvestorCap(address addr, uint tokenAmount) constant returns (bool limitBroken) {
        if (!isWhiteListed) throw;
        uint maxCap = earlyParticipantWhitelist[addr].maxCap;
        return (tokenAmountOf[addr].plus(tokenAmount)) > maxCap;
    }

    function isCrowdsaleFull() public constant returns (bool) {
        return tokensSold >= maximumSellableTokens;
    }

    /**
     * Dynamically create tokens and assign them to the investor.
     */
    function assignTokens(address receiver, uint tokenAmount) private {
        CrowdsaleTokenExt mintableToken = CrowdsaleTokenExt(token);
        mintableToken.mint(receiver, tokenAmount);
    }

    function setMaximumSellableTokens(uint tokens) onlyOwner {
        if (finalized) throw;

        if (!isUpdatable) throw;

        CrowdsaleExt lastCrowdsaleCntrct = CrowdsaleExt(lastCrowdsale);
        if (lastCrowdsaleCntrct.finalized()) throw;

        maximumSellableTokens = tokens;
        MaximumSellableTokensChanged(maximumSellableTokens);
    }
}

/**
 * This smart contract code is Copyright 2017 TokenMarket Ltd. For more information see https://tokenmarket.net
 *
 * Licensed under the Apache License, version 2.0: https://github.com/TokenMarketNet/ico/blob/master/LICENSE.txt
 */



/**
 * Safe unsigned safe math.
 *
 * https://blog.aragon.one/library-driven-development-in-solidity-2bebcaf88736#.750gwtwli
 *
 * Originally from https://raw.githubusercontent.com/AragonOne/zeppelin-solidity/master/contracts/SafeMathLib.sol
 *
 * Maintained here until merged to mainline zeppelin-solidity.
 *
 */
library SMathLib {

    function times(uint a, uint b) returns (uint) {
        uint c = a * b;
        assert(a == 0 || c / a == b);
        return c;
    }

    function divides(uint a, uint b) returns (uint) {
        assert(b > 0);
        uint c = a / b;
        assert(a == b * c + a % b);
        return c;
    }

    function minus(uint a, uint b) returns (uint) {
        assert(b <= a);
        return a - b;
    }

    function plus(uint a, uint b) returns (uint) {
        uint c = a + b;
        assert(c>=a);
        return c;
    }

}



/**
 * Collect funds from presale investors, buy tokens for them in a single transaction and distribute out tokens.
 *
 * - Collect funds from pre-sale investors
 * - Send funds to the crowdsale when it opens
 * - Allow owner to set the crowdsale
 * - Have refund after X days as a safety hatch if the crowdsale doesn't materilize
 * - Allow unlimited investors
 * - Tokens are distributed on PreICOProxyBuyer smart contract first
 * - The original investors can claim their tokens from the smart contract after the token transfer has been released
 * - All functions can be halted by owner if something goes wrong
 *
 */
contract PreICOProxyBuyer is Ownable, Haltable {
    using SMathLib for uint;

    /** How many investors we have now */
    uint public investorCount;

    /** How many wei we have raised totla. */
    uint public weiRaised;

    /** Who are our investors (iterable) */
    address[] public investors;

    /** How much they have invested */
    mapping(address => uint) public balances;

    /** How many tokens investors have claimed */
    mapping(address => uint) public claimed;

    /** When our refund freeze is over (UNIT timestamp) */
    uint public freezeEndsAt;

    /** What is the minimum buy in */
    uint public weiMinimumLimit;

    /** What is the maximum buy in */
    uint public weiMaximumLimit;

    /** How many weis total we are allowed to collect. */
    uint public weiCap;

    /** How many tokens were bought */
    uint public tokensBought;

    /** How many investors have claimed their tokens */
    uint public claimCount;

    uint public totalClaimed;

    /** If timeLock > 0, claiming is possible only after the time has passed **/
    uint public timeLock;

    /** This is used to signal that we want the refund **/
    bool public forcedRefund;

    /** Our ICO contract where we will move the funds */
    CrowdsaleExt public crowdsale;

    /** What is our current state. */
    enum State{Unknown, Funding, Distributing, Refunding}

    /** Somebody loaded their investment money */
    event Invested(address investor, uint weiAmount, uint tokenAmount, uint128 customerId);

    /** Refund claimed */
    event Refunded(address investor, uint value);

    /** We executed our buy */
    event TokensBoughts(uint count);

    /** We distributed tokens to an investor */
    event Distributed(address investor, uint count);

    /**
     * Create presale contract where lock up period is given days
     */
    function PreICOProxyBuyer(address _owner, uint _freezeEndsAt, uint _weiMinimumLimit, uint _weiMaximumLimit, uint _weiCap) {

        owner = _owner;

        // Give argument
        if(_freezeEndsAt == 0) {
            throw;
        }

        // Give argument
        if(_weiMinimumLimit == 0) {
            throw;
        }

        if(_weiMaximumLimit == 0) {
            throw;
        }

        weiMinimumLimit = _weiMinimumLimit;
        weiMaximumLimit = _weiMaximumLimit;
        weiCap = _weiCap;
        freezeEndsAt = _freezeEndsAt;
    }

    /**
     * Get the token we are distributing.
     */
    function getToken() public constant returns(FractionalERC20Ext) {
        if(address(crowdsale) == 0)  {
            throw;
        }

        return crowdsale.token();
    }

    /**
     * Participate to a presale.
     */
    function invest(uint128 customerId) private {

        // Cannot invest anymore through crowdsale when moving has begun
        if(getState() != State.Funding) throw;

        if(msg.value == 0) throw; // No empty buys

        address investor = msg.sender;

        bool existing = balances[investor] > 0;

        balances[investor] = balances[investor].plus(msg.value);

        // Need to satisfy minimum and maximum limits
        if(balances[investor] < weiMinimumLimit || balances[investor] > weiMaximumLimit) {
            throw;
        }

        // This is a new investor
        if(!existing) {
            investors.push(investor);
            investorCount++;
        }

        weiRaised = weiRaised.plus(msg.value);
        if(weiRaised > weiCap) {
            throw;
        }

        // We will use the same event form the Crowdsale for compatibility reasons
        // despite not having a token amount.
        Invested(investor, msg.value, 0, customerId);
    }

    function buyWithCustomerId(uint128 customerId) public stopInEmergency payable {
        invest(customerId);
    }

    function buy() public stopInEmergency payable {
        invest(0x0);
    }


    /**
     * Load funds to the crowdsale for all investors.
     *
     *
     */
    function buyForEverybody() stopNonOwnersInEmergency public {

        if(getState() != State.Funding) {
            // Only allow buy once
            throw;
        }

        // Crowdsale not yet set
        if(address(crowdsale) == 0) throw;

        // Buy tokens on the contract
        crowdsale.invest.value(weiRaised)(address(this));

        // Record how many tokens we got
        tokensBought = getToken().balanceOf(address(this));

        if(tokensBought == 0) {
            // Did not get any tokens
            throw;
        }

        TokensBoughts(tokensBought);
    }

    /**
     * How may tokens each investor gets.
     */
    function getClaimAmount(address investor) public constant returns (uint) {

        // Claims can be only made if we manage to buy tokens
        if(getState() != State.Distributing) {
            throw;
        }
        return balances[investor].times(tokensBought) / weiRaised;
    }

    /**
     * How many tokens remain unclaimed for an investor.
     */
    function getClaimLeft(address investor) public constant returns (uint) {
        return getClaimAmount(investor).minus(claimed[investor]);
    }

    /**
     * Claim all remaining tokens for this investor.
     */
    function claimAll() {
        claim(getClaimLeft(msg.sender));
    }

    /**
     * Claim N bought tokens to the investor as the msg sender.
     *
     */
    function claim(uint amount) stopInEmergency {
        require (now > timeLock);

        address investor = msg.sender;

        if(amount == 0) {
            throw;
        }

        if(getClaimLeft(investor) < amount) {
            // Woops we cannot get more than we have left
            throw;
        }

        // We track who many investor have (partially) claimed their tokens
        if(claimed[investor] == 0) {
            claimCount++;
        }

        claimed[investor] = claimed[investor].plus(amount);
        totalClaimed = totalClaimed.plus(amount);
        getToken().transfer(investor, amount);

        Distributed(investor, amount);
    }

    /**
     * ICO never happened. Allow refund.
     */
    function refund() stopInEmergency {

        // Trying to ask refund too soon
        if(getState() != State.Refunding) throw;

        address investor = msg.sender;
        if(balances[investor] == 0) throw;
        uint amount = balances[investor];
        delete balances[investor];
        if(!(investor.call.value(amount)())) throw;
        Refunded(investor, amount);
    }

    /**
     * Set the target crowdsale where we will move presale funds when the crowdsale opens.
     */
    function setCrowdsale(CrowdsaleExt _crowdsale) public onlyOwner {
        crowdsale = _crowdsale;

        // Check interface
        if(!crowdsale.isCrowdsale()) true;
    }

    /// @dev Setting timelock (delay) for claiming
    /// @param _timeLock Time after which claiming is possible
    function setTimeLock(uint _timeLock) public onlyOwner {
        timeLock = _timeLock;
    }

    /// @dev This is used in the first case scenario, this will force the state
    ///      to refunding. This can be also used when the ICO fails to meet the cap.
    function forceRefund() public onlyOwner {
        forcedRefund = true;
    }

    /// @dev This should be used if the Crowdsale fails, to receive the refuld money.
    ///      we can't use Crowdsale's refund, since our default function does not
    ///      accept money in.
    function loadRefund() public payable {
        if(getState() != State.Refunding) throw;
    }

    /**
     * Resolve the contract umambigious state.
     */
    function getState() public view returns(State) {
        if (forcedRefund)
            return State.Refunding;

        if(tokensBought == 0) {
            if(now >= freezeEndsAt) {
                return State.Refunding;
            } else {
                return State.Funding;
            }
        } else {
            return State.Distributing;
        }
    }

    /** Interface marker. */
    function isPresale() public constant returns (bool) {
        return true;
    }

    /** Explicitly call function from your wallet. */
    function() payable {
        throw;
    }
}