contract FiatTokenV1 is Ownable, Pausable, Blacklistable {
    using SafeMath for uint256;

    string public name;
    string public symbol;
    uint8 public decimals;
    address public masterMinter;

    bool internal initialized;
    mapping(address => uint256) internal balances;
    mapping(address => mapping(address => uint256)) internal allowed;
    uint256 internal totalSupply_ = 0;
    mapping(address => bool) internal minters;
    mapping(address => uint256) internal minterAllowed;

    event Mint(address indexed minter, address indexed to, uint256 amount);
    event Transfer(address indexed from, address indexed to, uint256 amount);
    event Burn(address indexed burner, uint256 amount);
    event Approval(
        address indexed owner,
        address indexed spender,
        uint256 amount
    );
    event MinterConfigured(address indexed minter, uint256 minterAllowedAmount);
    event MinterRemoved(address indexed oldMinter);
    event MasterMinterChanged(address indexed newMasterMinter);

    /**
     * @dev Throws if called by any account other than a minter
    */
    modifier onlyMinters() {
        require(minters[msg.sender] == true, "minters only");
        _;
    }

    /**
     * @dev Throws if called by any account other than the masterMinter
    */
    modifier onlyMasterMinter() {
        require(msg.sender == masterMinter, "master minter only");
        _;
    }

    /**
     * @dev Function to initialise contract
     * @param _name string Token name
     * @param _symbol string Token symbol
     * @param _decimals uint8 Token decimals
     * @param _masterMinter address Address of the master minter
     * @param _pauser address Address of the pauser
     * @param _blacklister address Address of the blacklister
     * @param _owner address Address of the owner
    */
    function initialize(
        string _name,
        string _symbol,
        uint8 _decimals,
        address _masterMinter,
        address _pauser,
        address _blacklister,
        address _owner
    ) public {
        require(!initialized, "already initialized!");
        require(_masterMinter != address(0), "master minter can't be 0x0");
        require(_pauser != address(0), "pauser can't be 0x0");
        require(_blacklister != address(0), "blacklister can't be 0x0");
        require(_owner != address(0), "owner can't be 0x0");

        name = _name;
        symbol = _symbol;
        decimals = _decimals;
        masterMinter = _masterMinter;
        pauser = _pauser;
        blacklister = _blacklister;
        setOwner(_owner);
        initialized = true;
    }

    /**
     * @dev Function to mint tokens
     * Validates that the contract is not paused
     * only minters can call this function
     * minter and the address that will received the minted tokens are not blacklisted
     * @param _to address The address that will receive the minted tokens.
     * @param _amount uint256 The amount of tokens to mint. Must be less than or equal to the minterAllowance of the caller.
     * @return True if the operation was successful.
    */
    function mint(address _to, uint256 _amount)
        public
        whenNotPaused
        onlyMinters
        notBlacklisted(msg.sender)
        notBlacklisted(_to)
        returns (bool)
    {
        require(_to != address(0), "can't mint to 0x0");
        require(_amount > 0, "amount to mint has to be > 0");

        uint256 mintingAllowedAmount = minterAllowance(msg.sender);
        require(_amount <= mintingAllowedAmount, "minter allowance too low");

        totalSupply_ = totalSupply_.add(_amount);
        balances[_to] = balances[_to].add(_amount);
        minterAllowed[msg.sender] = mintingAllowedAmount.sub(_amount);
        if (minterAllowance(msg.sender) == 0) {
            minters[msg.sender] = false;
            emit MinterRemoved(msg.sender);
        }
        emit Mint(msg.sender, _to, _amount);
        emit Transfer(0x0, _to, _amount);
        return true;
    }

    /**
     * @dev Function to get minter allowance of an address
     * @param _minter address The address of check minter allowance of
     * @return The minter allowance of the address
    */
    function minterAllowance(address _minter) public view returns (uint256) {
        return minterAllowed[_minter];
    }

    /**
     * @dev Function to check if an address is a minter
     * @param _address The address to check
     * @return A boolean value to indicates if an address is a minter
    */
    function isMinter(address _address) public view returns (bool) {
        return minters[_address];
    }

    /**
     * @dev Function to get total supply of token
     * @return The total supply of the token
    */
    function totalSupply() public view returns (uint256) {
        return totalSupply_;
    }

    /**
     * @dev Function to get token balance of an address
     * @param _address address The account
     * @return The token balance of an address
    */
    function balanceOf(address _address) public view returns (uint256) {
        return balances[_address];
    }

    /**
     * @dev Function to approves a spender to spend up to a certain amount of tokens
     * Validates that the contract is not paused
     * the owner and spender are not blacklisted
     * Avoid calling this function if possible (https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729)
     * @param _spender address The Address of the spender
     * @param _amount uint256 The amount of tokens that the spender is approved to spend
     * @return True if the operation was successful.
    */
    function approve(address _spender, uint256 _amount)
        public
        whenNotPaused
        notBlacklisted(msg.sender)
        notBlacklisted(_spender)
        returns (bool)
    {
        return _approve(_spender, _amount);
    }

    /**
     * @dev Alternative function to the approve function
     * Increases the allowance of the spender
     * Validates that the contract is not paused
     * the owner and spender are not blacklisted
     * @param _spender address The Address of the spender
     * @param _addedValue uint256 The amount of tokens to be added to a spender's allowance
     * @return True if the operation was successful.
    */
    function increaseAllowance(address _spender, uint256 _addedValue)
        public
        whenNotPaused
        notBlacklisted(msg.sender)
        notBlacklisted(_spender)
        returns (bool)
    {
        uint256 updatedAllowance = allowed[msg.sender][_spender].add(
            _addedValue
        );
        return _approve(_spender, updatedAllowance);
    }

    /**
     * @dev Alternative function to the approve function
     * Decreases the allowance of the spender
     * Validates that the contract is not paused
     * the owner and spender are not blacklisted
     * @param _spender address The Address of the spender
     * @param _subtractedValue uint256 The amount of tokens to be subtracted from a spender's allowance
     * @return True if the operation was successful.
    */
    function decreaseAllowance(address _spender, uint256 _subtractedValue)
        public
        whenNotPaused
        notBlacklisted(msg.sender)
        notBlacklisted(_spender)
        returns (bool)
    {
        uint256 updatedAllowance = allowed[msg.sender][_spender].sub(
            _subtractedValue
        );
        return _approve(_spender, updatedAllowance);
    }

    /**
     * @dev Function to approves a spender to spend up to a certain amount of tokens
     * @param _spender address The Address of the spender
     * @param _amount uint256 The amount of tokens that the spender is approved to spend
    */
    function _approve(address _spender, uint256 _amount)
        internal
        returns (bool)
    {
        allowed[msg.sender][_spender] = _amount;
        emit Approval(msg.sender, _spender, _amount);
        return true;
    }

    /**
     * @dev Function to get token allowance given to a spender by the owner
     * @param _owner address The address of the owner
     * @param _spender address The address of the spender
     * @return The number of tokens that a spender can spend on behalf of the owner
    */
    function allowance(address _owner, address _spender)
        public
        view
        returns (uint256)
    {
        return allowed[_owner][_spender];
    }

    /**
     * @dev Function to transfer tokens from one address to another.
     * Validates that the contract is not paused
     * the caller, sender and receiver of the tokens are not blacklisted
     * @param _from address The address which you want to send tokens from
     * @param _to address The address which you want to transfer to
     * @param _amount uint256 the amount of tokens to be transferred
     * @return True if the operation was successful.
    */
    function transferFrom(address _from, address _to, uint256 _amount)
        public
        whenNotPaused
        notBlacklisted(_to)
        notBlacklisted(msg.sender)
        notBlacklisted(_from)
        returns (bool)
    {
        require(_to != address(0), "can't transfer to 0x0");
        require(_amount <= balances[_from], "insufficient balance");
        require(
            _amount <= allowed[_from][msg.sender],
            "token allowance is too low"
        );

        balances[_from] = balances[_from].sub(_amount);
        balances[_to] = balances[_to].add(_amount);
        allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_amount);
        emit Transfer(_from, _to, _amount);
        return true;
    }

    /**
     * @dev Function to transfer token to a specified address
     * Validates that the contract is not paused
     * The sender and receiver are not blacklisted
     * @param _to The address to transfer to.
     * @param _amount The amount of tokens to be transferred.
     * @return True if the operation is successful
    */
    function transfer(address _to, uint256 _amount)
        public
        whenNotPaused
        notBlacklisted(msg.sender)
        notBlacklisted(_to)
        returns (bool)
    {
        require(_to != address(0), "can't transfer to 0x0");
        require(_amount <= balances[msg.sender], "insufficient balance");

        balances[msg.sender] = balances[msg.sender].sub(_amount);
        balances[_to] = balances[_to].add(_amount);
        emit Transfer(msg.sender, _to, _amount);
        return true;
    }

    /**
    * @dev Function to increase minter allowance of a minter
    * Validates that only the master minter can call this function
    * @param _minter address The address of the minter
    * @param _increasedAmount uint256 The amount of to be added to a minter's allowance
    */
    function increaseMinterAllowance(address _minter, uint256 _increasedAmount)
        public
        onlyMasterMinter
    {
        require(_minter != address(0), "minter can't be 0x0");
        uint256 updatedAllowance = minterAllowance(_minter).add(
            _increasedAmount
        );
        minterAllowed[_minter] = updatedAllowance;
        minters[_minter] = true;
        emit MinterConfigured(_minter, updatedAllowance);
    }

    /**
    * @dev Function to decrease minter allowance of a minter
    * Validates that only the master minter can call this function
    * @param _minter address The address of the minter
    * @param _decreasedAmount uint256 The amount of allowance to be subtracted from a minter's allowance
    */
    function decreaseMinterAllowance(address _minter, uint256 _decreasedAmount)
        public
        onlyMasterMinter
    {
        require(_minter != address(0), "minter can't be 0x0");
        require(minters[_minter], "not a minter");

        uint256 updatedAllowance = minterAllowance(_minter).sub(
            _decreasedAmount
        );
        minterAllowed[_minter] = updatedAllowance;
        if (minterAllowance(_minter) > 0) {
            emit MinterConfigured(_minter, updatedAllowance);
        } else {
            minters[_minter] = false;
            emit MinterRemoved(_minter);

        }
    }

    /**
     * @dev Function to allow a minter to burn some of its own tokens
     * Validates that the contract is not paused
     * caller is a minter and is not blacklisted
     * amount is less than or equal to the minter's mint allowance balance
     * @param _amount uint256 the amount of tokens to be burned
    */
    function burn(uint256 _amount)
        public
        whenNotPaused
        onlyMinters
        notBlacklisted(msg.sender)
    {
        uint256 balance = balances[msg.sender];
        require(_amount > 0, "burn amount has to be > 0");
        require(balance >= _amount, "balance in minter is < amount to burn");

        totalSupply_ = totalSupply_.sub(_amount);
        balances[msg.sender] = balance.sub(_amount);
        emit Burn(msg.sender, _amount);
        emit Transfer(msg.sender, address(0), _amount);
    }

    /**
     * @dev Function to allow the blacklister to burn entire balance of tokens from a blacklisted address
     * Validates that contract is not paused
     * caller is the blacklister
     * address to burn tokens from is a blacklisted address
     * @param _from address the address to burn tokens from
    */
    function lawEnforcementWipingBurn(address _from)
        public
        whenNotPaused
        onlyBlacklister
    {
        require(
            isBlacklisted(_from),
            "Can't wipe balances of a non blacklisted address"
        );
        uint256 balance = balances[_from];
        totalSupply_ = totalSupply_.sub(balance);
        balances[_from] = 0;
        emit Burn(_from, balance);
        emit Transfer(_from, address(0), balance);
    }

    /**
     * @dev Function to update the masterMinter role
     * Validates that the caller is the owner
     */
    function updateMasterMinter(address _newMasterMinter) public onlyOwner {
        require(_newMasterMinter != address(0), "master minter can't be 0x0");
        require(_newMasterMinter != masterMinter, "master minter is the same");
        masterMinter = _newMasterMinter;
        emit MasterMinterChanged(masterMinter);
    }

    /**
      * @dev Function to reject all EIP223 compatible tokens
      * @param _from address The address that is transferring the tokens
      * @param _value uint256 the amount of the specified token
      * @param _data bytes The data passed from the caller
      */
    function tokenFallback(address _from, uint256 _value, bytes _data)
        external
        pure
    {
        revert("reject EIP223 token transfers");
    }

    /**
     * @dev Function to reclaim all ERC20Recovery compatible tokens
     * Validates that the caller is the owner
     * @param _tokenAddress address The address of the token contract
     */
    function reclaimToken(address _tokenAddress) external onlyOwner {
        require(_tokenAddress != address(0), "token can't be 0x0");
        ERC20Recovery token = ERC20Recovery(_tokenAddress);
        uint256 balance = token.balanceOf(this);
        require(token.transfer(owner(), balance), "reclaim token failed");
    }
}
/**
 * @title FiatToken
 * @dev Token backed by fiat reserves
 */
function _approve(address _spender, uint256 _amount)
    internal
    returns (bool)
{
    allowed[msg.sender][_spender] = _amount;
    emit Approval(msg.sender, _spender, _amount);
    return true;
}

/**
 * @dev Function to approves a spender to spend up to a certain amount of tokens
 * @param _spender address The Address of the spender
 * @param _amount uint256 The amount of tokens that the spender is approved to spend
 */