pragma solidity ^0.6.0;

import 'https://github.com/OpenZeppelin/openzeppelin-contracts/contracts/token/ERC20/ERC20Burnable.sol';
import './Operator.sol';

contract Cash is ERC20Burnable, Operator {
    /**
     * @notice Constructs the Basis Cash ERC-20 contract.
     */
    constructor() public ERC20('iBAC', 'iBAC') {
        // Mints 1 Basis Cash to contract creator for initial Uniswap oracle deployment.
        // Will be burned after oracle deployment
        _mint(msg.sender, 2 * 10**18);
    }

    //    function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual override {
    //        super._beforeTokenTransfer(from, to, amount);
    //        require(
    //            to != operator(),
    //            "basis.cash: operator as a recipient is not allowed"
    //        );
    //    }

    /**
     * @notice Operator mints basis cash to a recipient
     * @param recipient_ The address of recipient
     * @param amount_ The amount of basis cash to mint to
     * @return whether the process has been done
     */
    function mint(address recipient_, uint256 amount_)
        public
        onlyOperator
        returns (bool)
    {
        uint256 balanceBefore = balanceOf(recipient_);
        _mint(recipient_, amount_);
        uint256 balanceAfter = balanceOf(recipient_);

        return balanceAfter > balanceBefore;
    }

    function burn(uint256 amount) public override onlyOperator {
        super.burn(amount);
    }

    function burnFrom(address account, uint256 amount)
        public
        override
        onlyOperator
    {
        super.burnFrom(account, amount);
    }
}

pragma solidity ^0.6.0;

import 'https://github.com/OpenZeppelin/openzeppelin-contracts/contracts/GSN/Context.sol';
import 'https://github.com/OpenZeppelin/openzeppelin-contracts/contracts/access/Ownable.sol';

contract Operator is Context, Ownable {
    address private _operator;

    event OperatorTransferred(
        address indexed previousOperator,
        address indexed newOperator
    );

    constructor() internal {
        _operator = _msgSender();
        emit OperatorTransferred(address(0), _operator);
    }

    function operator() public view returns (address) {
        return _operator;
    }

    modifier onlyOperator() {
        require(
            _operator == msg.sender,
            'operator: caller is not the operator'
        );
        _;
    }

    function isOperator() public view returns (bool) {
        return _msgSender() == _operator;
    }

    function transferOperator(address newOperator_) public onlyOwner {
        _transferOperator(newOperator_);
    }

    function _transferOperator(address newOperator_) internal {
        require(
            newOperator_ != address(0),
            'operator: zero address given for new operator'
        );
        emit OperatorTransferred(address(0), newOperator_);
        _operator = newOperator_;
    }
}

{
  "compilationTarget": {
    "browser/Cash.sol": "Cash"
  },
  "evmVersion": "istanbul",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "remappings": []
}