pragma solidity ^0.4.25;

library Address {
    function isContract(address account) internal view returns (bool) {
        uint256 size;
        assembly { size := extcodesize(account) }
        return size > 0;
    }
}

library ERC165Checker {
    bytes4 private constant _INTERFACE_ID_INVALID = 0xffffffff;
    bytes4 private constant _INTERFACE_ID_ERC165 = 0x01ffc9a7;

    function _supportsERC165(address account) internal view returns (bool) {
        return _supportsERC165Interface(account, _INTERFACE_ID_ERC165) &&
            !_supportsERC165Interface(account, _INTERFACE_ID_INVALID);
    }

    function _supportsInterface(address account, bytes4 interfaceId) internal view returns (bool) {
        return _supportsERC165(account) &&
            _supportsERC165Interface(account, interfaceId);
    }

    function _supportsAllInterfaces(address account, bytes4[] memory interfaceIds) internal view returns (bool) {
        if (!_supportsERC165(account)) {
            return false;
        }

        for (uint256 i = 0; i < interfaceIds.length; i++) {
            if (!_supportsERC165Interface(account, interfaceIds[i])) {
                return false;
            }
        }

        return true;
    }

    function _supportsERC165Interface(address account, bytes4 interfaceId) private view returns (bool) {
        (bool success, bool result) = _callERC165SupportsInterface(account, interfaceId);
        return (success && result);
    }

    function _callERC165SupportsInterface(address account, bytes4 interfaceId) private view returns (bool success, bool result) {
        bytes memory encodedParams = abi.encodeWithSelector(_INTERFACE_ID_ERC165, interfaceId);
        assembly {
            let encodedParams_data := add(0x20, encodedParams)
            let encodedParams_size := mload(encodedParams)

            let output := mload(0x40)
            mstore(output, 0x0)

            success := staticcall(
                30000,                   // 30k gas
                account,                 // To addr
                encodedParams_data,
                encodedParams_size,
                output,
                0x20                     // Outputs are 32 bytes long
            )

            result := mload(output)      // Load the result
        }
    }
}

interface IERC20 {
    function totalSupply() external view returns (uint256);
    function balanceOf(address account) external view returns (uint256);
    function transfer(address recipient, uint256 amount) external returns (bool);
    function allowance(address owner, address spender) external view returns (uint256);
    function approve(address spender, uint256 amount) external returns (bool);
    function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);

    event Transfer(address indexed from, address indexed to, uint256 value);
    event Approval(address indexed owner, address indexed spender, uint256 value);
}

library SafeMath {
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");
        return c;
    }

    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b <= a, "SafeMath: subtraction overflow");
        uint256 c = a - b;
        return c;
    }

    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        if (a == 0) {return 0;}

        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");
        return c;
    }

    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b > 0, "SafeMath: division by zero");
        uint256 c = a / b;
        return c;
    }

    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b != 0, "SafeMath: modulo by zero");
        return a % b;
    }
}

contract ERC20 is IERC20 {
    using SafeMath for uint256;

    mapping (address => uint256) private _balances;
    mapping (address => mapping (address => uint256)) private _allowances;

    uint256 private _totalSupply;

    function totalSupply() public view returns (uint256) {
        return _totalSupply;
    }

    function balanceOf(address account) public view returns (uint256) {
        return _balances[account];
    }

    function transfer(address recipient, uint256 amount) public returns (bool) {
        _transfer(msg.sender, recipient, amount);
        return true;
    }

    function allowance(address owner, address spender) public view returns (uint256) {
        return _allowances[owner][spender];
    }

    function approve(address spender, uint256 value) public returns (bool) {
        _approve(msg.sender, spender, value);
        return true;
    }

    function transferFrom(address sender, address recipient, uint256 amount) public returns (bool) {
        _transfer(sender, recipient, amount);
        _approve(sender, msg.sender, _allowances[sender][msg.sender].sub(amount));
        return true;
    }

    function increaseAllowance(address spender, uint256 addedValue) public returns (bool) {
        _approve(msg.sender, spender, _allowances[msg.sender][spender].add(addedValue));
        return true;
    }

    function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool) {
        _approve(msg.sender, spender, _allowances[msg.sender][spender].sub(subtractedValue));
        return true;
    }

    function _transfer(address sender, address recipient, uint256 amount) internal {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");

        _balances[sender] = _balances[sender].sub(amount);
        _balances[recipient] = _balances[recipient].add(amount);
        emit Transfer(sender, recipient, amount);
    }

    function _mint(address account, uint256 amount) internal {
        require(account != address(0), "ERC20: mint to the zero address");

        _totalSupply = _totalSupply.add(amount);
        _balances[account] = _balances[account].add(amount);
        emit Transfer(address(0), account, amount);
    }

    function _burn(address account, uint256 value) internal {
        require(account != address(0), "ERC20: burn from the zero address");

        _totalSupply = _totalSupply.sub(value);
        _balances[account] = _balances[account].sub(value);
        emit Transfer(account, address(0), value);
    }

    function _approve(address owner, address spender, uint256 value) internal {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");

        _allowances[owner][spender] = value;
        emit Approval(owner, spender, value);
    }

    function _burnFrom(address account, uint256 amount) internal {
        _burn(account, amount);
        _approve(account, msg.sender, _allowances[account][msg.sender].sub(amount));
    }
}

interface IERC165 {
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

contract ERC165 is IERC165 {
    bytes4 private constant _INTERFACE_ID_ERC165 = 0x01ffc9a7;
    
    mapping(bytes4 => bool) private _supportedInterfaces;

    constructor () internal {
        _registerInterface(_INTERFACE_ID_ERC165);
    }

    function supportsInterface(bytes4 interfaceId) external view returns (bool) {
        return _supportedInterfaces[interfaceId];
    }

    function _registerInterface(bytes4 interfaceId) internal {
        require(interfaceId != 0xffffffff, "ERC165: invalid interface id");
        _supportedInterfaces[interfaceId] = true;
    }
}

contract IERC1363 is IERC20, ERC165 {
    function transferAndCall(address to, uint256 value) public returns (bool);
    function transferAndCall(address to, uint256 value, bytes memory data) public returns (bool);
    function transferFromAndCall(address from, address to, uint256 value) public returns (bool);
    function transferFromAndCall(address from, address to, uint256 value, bytes memory data) public returns (bool);
    function approveAndCall(address spender, uint256 value) public returns (bool);
    function approveAndCall(address spender, uint256 value, bytes memory data) public returns (bool);
}

contract IERC1363Receiver {
    function onTransferReceived(address operator, address from, uint256 value, bytes memory data) public returns (bytes4); // solhint-disable-line  max-line-length
}

contract IERC1363Spender {
    function onApprovalReceived(address owner, uint256 value, bytes memory data) public returns (bytes4);
}

contract ERC1363 is ERC20, IERC1363 {
    using Address for address;
    
    bytes4 internal constant _INTERFACE_ID_ERC1363_TRANSFER = 0x4bbee2df;
    bytes4 internal constant _INTERFACE_ID_ERC1363_APPROVE = 0xfb9ec8ce;
    bytes4 private constant _ERC1363_RECEIVED = 0x88a7ca5c;
    bytes4 private constant _ERC1363_APPROVED = 0x7b04a2d0;

    constructor() public {
        _registerInterface(_INTERFACE_ID_ERC1363_TRANSFER);
        _registerInterface(_INTERFACE_ID_ERC1363_APPROVE);
    }

    function transferAndCall(address to, uint256 value) public returns (bool) {
        return transferAndCall(to, value, "");
    }

    function transferAndCall(address to, uint256 value, bytes memory data) public returns (bool) {
        require(transfer(to, value));
        require(_checkAndCallTransfer(msg.sender, to, value, data));
        return true;
    }

    function transferFromAndCall(address from, address to, uint256 value) public returns (bool) {
        return transferFromAndCall(from, to, value, "");
    }

    function transferFromAndCall(address from, address to, uint256 value, bytes memory data) public returns (bool) {
        require(transferFrom(from, to, value));
        require(_checkAndCallTransfer(from, to, value, data));
        return true;
    }

    function approveAndCall(address spender, uint256 value) public returns (bool) {
        return approveAndCall(spender, value, "");
    }

    function approveAndCall(address spender, uint256 value, bytes memory data) public returns (bool) {
        approve(spender, value);
        require(_checkAndCallApprove(spender, value, data));
        return true;
    }

    function _checkAndCallTransfer(address from, address to, uint256 value, bytes memory data) internal returns (bool) {
        if (!to.isContract()) {
            return false;
        }
        bytes4 retval = IERC1363Receiver(to).onTransferReceived(
            msg.sender, from, value, data
        );
        return (retval == _ERC1363_RECEIVED);
    }

    function _checkAndCallApprove(address spender, uint256 value, bytes memory data) internal returns (bool) {
        if (!spender.isContract()) {
            return false;
        }
        bytes4 retval = IERC1363Spender(spender).onApprovalReceived(
            msg.sender, value, data
        );
        return (retval == _ERC1363_APPROVED);
    }
}

contract ERC20Detailed is IERC20 {
    string private _name;
    string private _symbol;
    uint8 private _decimals;

    constructor (string memory name, string memory symbol, uint8 decimals) public {
        _name = name;
        _symbol = symbol;
        _decimals = decimals;
    }

    function name() public view returns (string memory) {return _name;}
    function symbol() public view returns (string memory) {return _symbol;}
    function decimals() public view returns (uint8) {return _decimals;}
}

library Roles {
    struct Role {mapping (address => bool) bearer;}

    function add(Role storage role, address account) internal {
        require(!has(role, account), "Roles: account already has role");
        role.bearer[account] = true;
    }

    function remove(Role storage role, address account) internal {
        require(has(role, account), "Roles: account does not have role");
        role.bearer[account] = false;
    }

    function has(Role storage role, address account) internal view returns (bool) {
        require(account != address(0), "Roles: account is the zero address");
        return role.bearer[account];
    }
}

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), "MinterRole: caller does not have the Minter role");
        _;
    }

    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 ERC20Mintable is ERC20, MinterRole {
    function mint(address account, uint256 amount) public onlyMinter returns (bool) {
        _mint(account, amount);
        return true;
    }
}

contract ERC20Capped is ERC20Mintable {
    uint256 private _cap;

    constructor (uint256 cap) public {
        require(cap > 0, "ERC20Capped: cap is 0");
        _cap = cap;
    }

    function cap() public view returns (uint256) {return _cap;}
    function _mint(address account, uint256 value) internal {
        require(totalSupply().add(value) <= _cap, "ERC20Capped: cap exceeded");
        super._mint(account, value);
    }
}

contract ERC20Burnable is ERC20 {
    function burn(uint256 amount) public {_burn(msg.sender, amount);}
    function burnFrom(address account, uint256 amount) public {_burnFrom(account, amount);}
}

contract Ownable {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    constructor () internal {
        _owner = msg.sender;
        emit OwnershipTransferred(address(0), _owner);
    }

    function owner() public view returns (address) {return _owner;}

    modifier onlyOwner() {
        require(isOwner(), "Ownable: caller is not the owner");
        _;
    }

    function isOwner() public view returns (bool) {return msg.sender == _owner;}
    function transferOwnership(address newOwner) public onlyOwner {_transferOwnership(newOwner);}

    function renounceOwnership() public onlyOwner {
        emit OwnershipTransferred(_owner, address(0));
        _owner = address(0);
    }

    function _transferOwnership(address newOwner) internal {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }
}

contract TokenRecover is Ownable {
    function recoverERC20(address tokenAddress, uint256 tokenAmount) public onlyOwner {IERC20(tokenAddress).transfer(owner(), tokenAmount);}
}

contract OperatorRole {
    using Roles for Roles.Role;

    event OperatorAdded(address indexed account);
    event OperatorRemoved(address indexed account);

    Roles.Role private _operators;

    constructor() internal {_addOperator(msg.sender);}

    modifier onlyOperator() {
        require(isOperator(msg.sender));
        _;
    }

    function isOperator(address account) public view returns (bool) {return _operators.has(account);}
    function addOperator(address account) public onlyOperator {_addOperator(account);}
    function renounceOperator() public {_removeOperator(msg.sender);}

    function _addOperator(address account) internal {
        _operators.add(account);
        emit OperatorAdded(account);
    }

    function _removeOperator(address account) internal {
        _operators.remove(account);
        emit OperatorRemoved(account);
    }
}

contract BaseERC20Token is ERC20Detailed, ERC20Capped, ERC20Burnable, OperatorRole, TokenRecover {

    event MintFinished();
    event TransferEnabled();

    bool private _mintingFinished = false; // indicates if minting is finished
    bool private _transferEnabled = false; // indicates if transfer is enabled

    modifier canMint() {
        require(!_mintingFinished);
        _;
    }

    modifier canTransfer(address from) {
        require(_transferEnabled || isOperator(from));
        _;
    }

    constructor(string memory name, string memory symbol, uint8 decimals, uint256 cap, uint256 initialSupply) public ERC20Detailed(name, symbol, decimals) ERC20Capped(cap) {
        if (initialSupply > 0) {_mint(owner(), initialSupply);}
    }

    function mintingFinished() public view returns (bool) {return _mintingFinished;}
    function transferEnabled() public view returns (bool) {return _transferEnabled;}
    function mint(address to, uint256 value) public canMint returns (bool) {return super.mint(to, value);}
    function transfer(address to, uint256 value) public canTransfer(msg.sender) returns (bool) {return super.transfer(to, value);}
    function transferFrom(address from, address to, uint256 value) public canTransfer(from) returns (bool) {return super.transferFrom(from, to, value);}

    function finishMinting() public onlyOwner canMint {
        _mintingFinished = true;
        emit MintFinished();
    }

    function enableTransfer() public onlyOwner {
        _transferEnabled = true;
        emit TransferEnabled();
    }

    function removeOperator(address account) public onlyOwner {_removeOperator(account);}
    function removeMinter(address account) public onlyOwner {_removeMinter(account);}
}

contract BaseERC1363Token is BaseERC20Token, ERC1363 {
    constructor(string memory name, string memory symbol, uint8 decimals, uint256 cap, uint256 initialSupply) public BaseERC20Token(name, symbol, decimals, cap, initialSupply){}
}

contract ERC20Token is BaseERC1363Token {
    string public builtOn = "https://vittominacori.github.io/erc20-generator";
    constructor(string memory name, string memory symbol, uint8 decimals, uint256 cap, uint256 initialSupply, bool transferEnabled) public BaseERC1363Token(name, symbol, decimals, cap, initialSupply) {
        if (transferEnabled) {enableTransfer();}
    }
}

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