// Contract: HlorToken
// Target function: function revoke(bytes32 _operation)
 owner address The address which owns the funds.
     * @param spender address The address which will spend the funds.
     * @return A uint256 specifying the amount of tokens still available for the spender.
     */
    function allowance(address owner, address spender) public view returns (uint256) {
        return _allowed[owner][spender];
    }

    /**
    * @dev Transfer token for a specified address
    * @param to The address to transfer to.
    * @param value The amount to be transferred.
    */
    function transfer(address to, uint256 value) public returns (bool) {
        _transfer(msg.sender, to, value);
        return true;
    }

    /**
     * @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
     * Beware that changing an allowance with this method brings the risk that someone may use both the old
     * and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
     * race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     * @param spender The address which will spend the funds.
     * @param value The amount of tokens to be spent.
     */
    function approve(address spender, uint256 value) public returns (bool) {
        require(spender != address(0));

        _allowed[msg.sender][spender] = value;
        emit Approval(msg.sender, spender, value);
        return true;
    }

    /**
     * @dev Transfer tokens from one address to another.
     * Note that while this function emits an Approval event, this is not required as per the specification,
     * and other compliant implementations may not emit the event.
     * @param from address The address which you want to send tokens from
     * @param to address The address which you want to transfer to
     * @param value uint256 the amount of tokens to be transferred
     */
    function transferFrom(address from, address to, uint256 value) public returns (bool) {
        _allowed[from][msg.sender] = _allowed[from][msg.sender].sub(value);
        _transfer(from, to, value);
        emit Approval(from, msg.sender, _allowed[from][msg.sender]);
        return true;
    }

    /**
     * @dev Increase the amount of tokens that an owner allowed to a spender.
     * approve should be called when allowed_[_spender] == 0. To increment
     * allowed value is better to use this function to avoid 2 calls (and wait until
     * the first transaction is mined)
     * From MonolithDAO Token.sol
     * Emits an Approval event.
     * @param spender The address which will spend the funds.
     * @param addedValue The amount of tokens to increase the allowance by.
     */
    function increaseAllowance(address spender, uint256 addedValue) public returns (bool) {
        require(spender != address(0));

        _allowed[msg.sender][spender] = _allowed[msg.sender][spender].add(addedValue);
        emit Approval(msg.sender, spender, _allowed[msg.sender][spender]);
        return true;
    }

    /**
     * @dev Decrease the amount of tokens that an owner allowed to a spender.
     * approve should be called when allowed_[_spender] == 0. To decrement
     * allowed value is better to use this function to avoid 2 calls (and wait until
     * the first transaction is mined)
     * From MonolithDAO Token.sol
     * Emits an Approval event.
     * @param spender The address which will spend the funds.
     * @param subtractedValue The amount of tokens to decrease the allowance by.
     */
    function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool) {
        require(spender != address(0));

        _allowed[msg.sender][spender] = _allowed[msg.sender][spender].sub(subtractedValue);
        emit Approval(msg.sender, spender, _allowed[msg.sender][spender]);
        return true;
    }

    /**
    * @dev Transfer token for a specified addresses
    * @param from The address to transfer from.
    * @param to The address to transfer to.
    * @param value The amount to be transferred.
    */
    function _transfer(address from, address to, uint256 value) internal {
        require(to != address(0));

        _balances[from] = _balances[from].sub(value);
        _balances[to] = _balances[to].add(value);
        emit Transfer(from, to, value);
    }

    /**
     * @dev Internal function that mints an amount of the token and assigns it to
     * an account. This encapsulates the modification of balances such that the
     * proper events are emitted.
     * @param account The account that will receive the created tokens.
     * @param value The amount that will be created.
     */
    function _mint(address account, uint256 value) internal {
        require(account != address(0));

        _totalSupply = _totalSupply.add(value);
        _balances[account] = _balances[account].add(value);
        emit Transfer(address(0), account, value);
    }
}


contract MinterRole {
    using Roles for Roles.Role;

    event MinterAdded(address indexed account);
    event MinterRemoved(address indexed account);

    Roles.Role private _minters;

    constructor () internal {
        _addMinter(msg.sender);
    }

    modifier onlyMinter() {
        require(isMinter(msg.sender));
        _;
    }

    function isMinter(address account) public view returns (bool) {
        return _minters.has(account);
    }

    function addMinter(address account) public onlyMinter {
        _addMinter(account);
    }

    function renounceMinter() public {
        _removeMinter(msg.sender);
    }

    function _addMinter(address account) internal {
        _minters.add(account);
        emit MinterAdded(account);
    }

    function _removeMinter(address account) internal {
        _minters.remove(account);
        emit MinterRemoved(account);
    }
}

contract PauserRole {
    using Roles for Roles.Role;

    event PauserAdded(address indexed account);
    event PauserRemoved(address indexed account);

    Roles.Role private _pausers;

    constructor () internal {
        _addPauser(msg.sender);
    }

    modifier onlyPauser() {
        require(isPauser(msg.sender));
        _;
    }

    function isPauser(address account) public view returns (bool) {
        return _pausers.has(account);
    }

    function addPauser(address account) public onlyPauser {
        _addPauser(account);
    }

    function renouncePauser() public {
        _removePauser(msg.sender);
    }

    function _addPauser(address account) internal {
        _pausers.add(account);
        emit PauserAdded(account);
    }

    function _removePauser(address account) internal {
        _pausers.remove(account);
        emit PauserRemoved(account);
    }
}


/**
 * @title Pausable
 * @dev Base contract which allows children to implement an emergency stop mechanism.
 */
contract Pausable is PauserRole, ERC20 {
    event Paused(address account);
    event Unpaused(address account);

    bool private _paused;

    constructor () internal {
        _paused = false;
    }

    /**
     * @return true if the contract is paused, false otherwise.
     */
    function paused() public view returns (bool) {
        return _paused;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is not paused.
     */
    modifier whenNotPaused() {
        require(!_paused);
        _;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is paused.
     */
    modifier whenPaused() {
        require(_paused);
        _;
    }

    /**
     * @dev called by the owner to pause, triggers stopped state
     */
    function pause() public onlyPauser whenNotPaused {
        _paused = true;
        emit Paused(msg.sender);
    }

    /**
     * @dev called by the owner to unpause, returns to normal state
     */
    function unpause() public onlyPauser whenPaused {
        _paused = false;
        emit Unpaused(msg.sender);
    }
}


/**
 * @title Pausable token
 * @dev ERC20 modified with pausable transfers.
 **/
contract PausableToken is ERC20, Pausable {
    function transfer(address to, uint256 value) public whenNotPaused returns (bool) {
        return super.transfer(to, value);
    }

    function transferFrom(address from,address to, uint256 value) public whenNotPaused returns (bool) {
        return super.transferFrom(from, to, value);
    }

    function approve(address spender, uint256 value) public whenNotPaused returns (bool) {
        return super.approve(spender, value);
    }

    function increaseAllowance(address spender, uint addedValue) public whenNotPaused returns (bool success) {
        return super.increaseAllowance(spender, addedValue);
    }

    function decreaseAllowance(address spender, uint subtractedValue) public whenNotPaused returns (bool success) {
        return super.decreaseAllowance(spender, subtractedValue);
    }
}


/**
 * @title MintableToken
 * @dev ERC20 minting logic
 */
contract MintableToken is PausableToken, MinterRole {
    event MintFinished();
    bool public mintingFinished = false;

    modifier canMint() {
        require(!mintingFinished);
        _;
    } 
    /**
     * @dev Function to mint tokens
     * @param to The address that will receive the minted tokens.
     * @param value The amount of tokens to mint.
     * @return A boolean that indicates if the operation was successful.
     */
    function mint(address to, uint256 value) public onlyMinter whenNotPaused canMint returns (bool) {
        _mint(to, value);
        return true;
    }
    /**
    * @dev Function to stop minting new tokens.
    * @return True if the operation was successful.
    */
    function finishMinting() onlyMinter public returns (bool) {
        mintingFinished = true;
        emit MintFinished();
        return true;
    }
}


contract HlorToken is MintableToken {
    string public constant name = "HLOR";
    string public constant symbol = "HLOR";
    uint32 public constant decimals = 18;
}

// Copyright (C) 2017  MixBytes, LLC

// Licensed under the Apache License, Version 2.0 (the "License").
// You may not use this file except in compliance with the License.

// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND (express or implied).

// Code taken from https://github.com/ethereum/dapp-bin/blob/master/wallet/wallet.sol
// Audit, refactoring and improvements by github.com/Eenae

// @authors:
// Gav Wood <g@ethdev.com>
// inheritable "property" contract that enables methods to be protected by requiring the acquiescence of either a
// single, or, crucially, each of a number of, designated owners.
// usage:
// use modifiers onlyowner (just own owned) or onlymanyowners(hash), whereby the same hash must be provided by
// some number (specified in constructor) of the set of owners (specified in the constructor, modifiable) before the
// interior is executed.

/// note: during any ownership changes all pending operations (waiting for more signatures) are cancelled
contract multiowned {

    // TYPES

    // struct for the status of a pending operation.
    struct MultiOwnedOperationPendingState {
        // count of confirmations needed
        uint yetNeeded;

        // bitmap of confirmations where owner #ownerIndex's decision corresponds to 2**ownerIndex bit
        uint ownersDone;

        // position of this operation key in m_multiOwnedPendingIndex
        uint index;
    }

    // EVENTS

    event Confirmation(address owner, bytes32 operation);
    event Revoke(address owner, bytes32 operation);
    event FinalConfirmation(address owner, bytes32 operation);

    // some others are in the case of an owner changing.
    event OwnerChanged(address oldOwner, address newOwner);
    event OwnerAdded(address newOwner);
    event OwnerRemoved(address oldOwner);

    // the last one is emitted if the required signatures change
    event RequirementChanged(uint newRequirement);

    // MODIFIERS

    // simple single-sig function modifier.
    modifier onlyowner {
        require(isOwner(msg.sender));
        _;
    }
    // multi-sig function modifier: the operation must have an intrinsic hash in order
    // that later attempts can be realised as the same underlying operation and
    // thus count as confirmations.
    modifier onlymanyowners(bytes32 _operation) {
        if (confirmAndCheck(_operation)) {
            _;
        }
        // Even if required number of confirmations has't been collected yet,
        // we can't throw here - because changes to the state have to be preserved.
        // But, confirmAndCheck itself will throw in case sender is not an owner.
    }

    modifier validNumOwners(uint _numOwners) {
        require(_numOwners > 0 && _numOwners <= c_maxOwners);
        _;
    }

    modifier multiOwnedValidRequirement(uint _required, uint _numOwners) {
        require(_required > 0 && _required <= _numOwners);
        _;
    }

    modifier ownerExists(address _address) {
        require(isOwner(_address));
        _;
    }

    modifier ownerDoesNotExist(address _address) {
        require(!isOwner(_address));
        _;
    }

    modifier multiOwnedOperationIsActive(bytes32 _operation) {
        require(isOperationActive(_operation));
        _;
    }

    // METHODS

    // constructor is given number of sigs required to do protected "onlymanyowners" transactions
    // as well as the selection of addresses capable of confirming them (msg.sender is not added to the owners!).
    constructor(address[] memory _owners, uint _required)
        public
        validNumOwners(_owners.length)
        multiOwnedValidRequirement(_required, _owners.length)
    {
        assert(c_maxOwners <= 255);

        m_numOwners = _owners.length;
        m_multiOwnedRequired = _required;

        for (uint i = 0; i < _owners.length; ++i)
        {
            address owner = _owners[i];
            // invalid and duplicate addresses are not allowed
            require(address(0) != owner && !isOwner(owner) /* not isOwner yet! */);

            uint currentOwnerIndex = checkOwnerIndex(i + 1 /* first slot is unused */);
            m_owners[currentOwnerIndex] = owner;
            m_ownerIndex[owner] = currentOwnerIndex;
        }

        assertOwnersAreConsistent();
    }

    /// @notice replaces an owner `_from` with another `_to`.
    /// @param _from address of owner to replace
    /// @param _to address of new owner
    // All pending operations will be canceled!
    function changeOwner(address _from, address _to)
        external
        ownerExists(_from)
        ownerDoesNotExist(_to)
        onlymanyowners(keccak256(msg.data))
    {
        assertOwnersAreConsistent();

        clearPending();
        uint ownerIndex = checkOwnerIndex(m_ownerIndex[_from]);
        m_owners[ownerIndex] = _to;
        m_ownerIndex[_from] = 0;
        m_ownerIndex[_to] = ownerIndex;

        assertOwnersAreConsistent();
        emit OwnerChanged(_from, _to);
    }

    /// @notice adds an owner
    /// @param _owner address of new owner
    // All pending operations will be canceled!
    function addOwner(address _owner)
        external
        ownerDoesNotExist(_owner)
        validNumOwners(m_numOwners + 1)
        onlymanyowners(keccak256(msg.data))
    {
        assertOwnersAreConsistent();

        clearPending();
        m_numOwners++;
        m_owners[m_numOwners] = _owner;
        m_ownerIndex[_owner] = checkOwnerIndex(m_numOwners);

        assertOwnersAreConsistent();
        emit OwnerAdded(_owner);
    }

    /// @notice removes an owner
    /// @param _owner address of owner to remove
    // All pending operations will be canceled!
    function removeOwner(address _owner)
        external
        ownerExists(_owner)
        validNumOwners(m_numOwners - 1)
        multiOwnedValidRequirement(m_multiOwnedRequired, m_numOwners - 1)
        onlymanyowners(keccak256(msg.data))
    {
        assertOwnersAreConsistent();

        clearPending();
        uint ownerIndex = checkOwnerIndex(m_ownerIndex[_owner]);
        m_owners[ownerIndex] = address(0);
        m_ownerIndex[_owner] = 0;
        //make sure m_numOwners is equal to the number of owners and always points to the last owner
        reorganizeOwners();

        assertOwnersAreConsistent();
        emit OwnerRemoved(_owner);
    }

    /// @notice changes the required number of owner signatures
    /// @param _newRequired new number of signatures required
    // All pending operations will be canceled!
    function changeRequirement(uint _newRequired)
        external
        multiOwnedValidRequirement(_newRequired, m_numOwners)
        onlymanyowners(keccak256(msg.data))
    {
        m_multiOwnedRequired = _newRequired;
        clearPending();
        emit RequirementChanged(_newRequired);
    }

    /// @notice Gets an owner by 0-indexed position
    /// @param ownerIndex 0-indexed owner position
    function getOwner(uint ownerIndex) public view returns (address) {
        return m_owners[ownerIndex + 1];
    }

    /// @notice Gets owners
    /// @return memory array of owners
    function getOwners() public view returns (address[] memory) {
        address[] memory result = new address[](m_numOwners);
        for (uint i = 0; i < m_numOwners; i++)
            result[i] = getOwner(i);

        return result;
    }

    /// @notice checks if provided address is an owner address
    /// @param _addr address to check
    /// @return true if it's an owner
    function isOwner(address _addr) public view returns (bool) {
        return m_ownerIndex[_addr] > 0;
    }

    /// @notice Tests ownership of the current caller.
    /// @return true if it's an owner
    // It's advisable to call it by new owner to make sure that the same erroneous address is not copy-pasted to
    // addOwner/changeOwner and to isOwner.
    function amIOwner() external view onlyowner returns (bool) {
        return true;
    }