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// SPDX-License-Identifier: GPL-3.0-or-later
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

pragma solidity ^0.8.0;

import "./BaseRateProviderFactory.sol";
import "./CombinedRateProvider.sol";

/**
 * @title  Combined Rate Provider Factory
 * @notice This contract is a factory for creating instances of CombinedRateProvider.
 * @dev    This factory contract allows for the deployment of CombinedRateProvider contracts, 
 *         which are used to combine market rates from two individual rate providers.
 */


contract CombinedRateProviderFactory is BaseRateProviderFactory {
    /**
     * @notice Deploys a new CombinedRateProvider contract using a price feed.
     * @param _rateProvider1 - The first of two rate providers the user wishes to multiply
     * @param _rateProvider2 - The second of two rate providers the user wishes to multiply
     */
    function create(address _rateProvider1, address _rateProvider2) external returns (CombinedRateProvider) {
        CombinedRateProvider rateProvider = new CombinedRateProvider(_rateProvider1, _rateProvider2);
        _onCreate(address(rateProvider));
        return rateProvider;
    }
}

// SPDX-License-Identifier: GPL-3.0-or-later
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

pragma solidity ^0.8.0;

import "./interfaces/IRateProvider.sol";

contract CombinedRateProvider {
    address public rateProvider1;
    address public rateProvider2;

    constructor(address _rateProvider1, address _rateProvider2) {
        rateProvider1 = _rateProvider1;
        rateProvider2 = _rateProvider2;
    }

    // Function to combine both of the rate providers via multiplication
    function getRate() external view returns (uint256) {
        // rateProvider1 and rateProvider2 must respect the proper interface.
        uint256 rate1 = IRateProvider(rateProvider1).getRate();
        uint256 rate2 = IRateProvider(rateProvider2).getRate();
        return rate1 * rate2 / 1e18; // Multiplies the rates respecting the proper interface together and divides by 1e18 to normalize.
    }
}

// SPDX-License-Identifier: GPL-3.0-or-later
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

pragma solidity ^0.8.0;

import "./interfaces/IBaseRateProviderFactory.sol";

/**
 * @title Base Rate Provider Factory
 * @notice Base Factory for creating RateProviders
 * @dev This is a base contract for building factories that create RateProviders.
 */
contract BaseRateProviderFactory is IBaseRateProviderFactory {
    // Mapping of rate providers created by this factory.
    mapping(address => bool) private _isRateProviderFromFactory;

    event RateProviderCreated(address indexed rateProvider);

    function isRateProviderFromFactory(address rateProvider) external view returns (bool) {
        return _isRateProviderFromFactory[rateProvider];
    }

    function _onCreate(address rateProvider) internal {
        _isRateProviderFromFactory[rateProvider] = true;
        emit RateProviderCreated(rateProvider);
    }
}

// SPDX-License-Identifier: GPL-3.0-or-later
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

pragma solidity ^0.8.0;

// TODO: pull this from the monorepo
interface IRateProvider {
    function getRate() external view returns (uint256);
}

// SPDX-License-Identifier: GPL-3.0-or-later
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

pragma solidity ^0.8.0;

interface IBaseRateProviderFactory {
    /**
     * @dev Checks if a rate provider was created by the derived factory.
     * @param rateProvider - Address of the rate provider to check.
     * @return bool - True if the rate provider was created by the derived factory.
     */
    function isRateProviderFromFactory(address rateProvider) external view returns (bool);
}

{
  "optimizer": {
    "enabled": false,
    "runs": 200
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "remappings": []
}

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[{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"rateProvider","type":"address"}],"name":"RateProviderCreated","type":"event"},{"inputs":[{"internalType":"address","name":"_rateProvider1","type":"address"},{"internalType":"address","name":"_rateProvider2","type":"address"}],"name":"create","outputs":[{"internalType":"contract CombinedRateProvider","name":"","type":"address"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"rateProvider","type":"address"}],"name":"isRateProviderFromFactory","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"}]

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