// File: contracts/PremiaUncutErc20Wrapper.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.7.0;

import '@openzeppelin/contracts/access/Ownable.sol';

import "./interface/IPremiaUncutErc20.sol";

/// @author Premia
/// @title Wrapper for uPremia reward in PremiaOption contract
/// @notice This wrapper is intended to solve a minor issue where uPremia reward would be minted in PremiaOption contract,
///         instead of user's wallet, when using flash exercise
contract PremiaUncutErc20Wrapper is Ownable {
    IPremiaUncutErc20 public uPremia;
    address public premiaOption;

    constructor(IPremiaUncutErc20 _uPremia, address _premiaOption) {
        uPremia = _uPremia;
        premiaOption = _premiaOption;
    }

    /// @notice Get the usd price of a token
    /// @param _token The token from which to give usd price
    /// @return The usd price
    function getTokenPrice(address _token) external view returns(uint256) {
        return uPremia.getTokenPrice(_token);
    }

    /// @notice Mint uPremia
    /// @param _account The address for which to mint
    /// @param _amount The amount to mint
    function mint(address _account, uint256 _amount) external onlyOwner {
        // Override premiaOption contract into tx origin
        if (_account == premiaOption) {
            _account = tx.origin;
        }

        return uPremia.mint(_account, _amount);
    }

    /// @notice Mint corresponding uPremia reward based on protocol fee paid
    /// @param _account The address for which to mint
    /// @param _token The token in which the protocol fee has been paid
    /// @param _feePaid The fee paid (in _token)
    /// @param _decimals The token decimals
    function mintReward(address _account, address _token, uint256 _feePaid, uint8 _decimals) external onlyOwner {
        // Override premiaOption contract into tx origin
        if (_account == premiaOption) {
            _account = tx.origin;
        }

        return uPremia.mintReward(_account, _token, _feePaid, _decimals);
    }
}

// File: @openzeppelin/contracts/access/Ownable.sol



// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

import "../GSN/Context.sol";
/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

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

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor () internal {
        address msgSender = _msgSender();
        _owner = msgSender;
        emit OwnershipTransferred(address(0), msgSender);
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(_owner == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        emit OwnershipTransferred(_owner, address(0));
        _owner = address(0);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }
}

// File: contracts/interface/IPremiaUncutErc20.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.7.0;

import '@openzeppelin/contracts/token/ERC20/IERC20.sol';

interface IPremiaUncutErc20 is IERC20 {
    function getTokenPrice(address _token) external view returns(uint256);
    function mint(address _account, uint256 _amount) external;
    function mintReward(address _account, address _token, uint256 _feePaid, uint8 _decimals) external;
}
// File: @openzeppelin/contracts/GSN/Context.sol



// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

/*
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with GSN meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address payable) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes memory) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}

// File: @openzeppelin/contracts/token/ERC20/IERC20.sol



// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `recipient`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address recipient, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: 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
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `sender` to `recipient` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);

    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);
}