// File: contracts/oracles/adapters/curve/CurvePoolOracle.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "../ProviderAwareOracle.sol";
import "../../interfaces/CurveTokenInterface.sol";
import "../../../lib/FixedPointMathLib.sol";

contract CurvePoolOracle is ProviderAwareOracle {

    using FixedPointMathLib for uint;

    mapping(address => address) public pools;
    address public immutable conversionAsset;

    constructor(address _provider, address _conversionAsset) ProviderAwareOracle(_provider) {
        require(provider.getSafePrice(_conversionAsset) != 0);
        conversionAsset = _conversionAsset;
    }

    function setPool(address token, address pool) external onlyOwner {
        require(CurveSwapInterface(pool).get_virtual_price() != 0, "Error with Curve Pool");
        pools[token] = pool;
    }

    function getSafePrice(address token) external view override returns (uint256 _amountOut) {
        _amountOut = getCrvTokenPrice(token);
    }

    /// @dev This method has no guarantee on the safety of the price returned. It should only be
    //used if the price returned does not expose the caller contract to flashloan attacks.
    function getCurrentPrice(address token) external view override returns (uint256 _amountOut) {
        _amountOut = getCrvTokenPrice(token);
    }

    /// @dev Gets the safe price, no updates necessary
    function updateSafePrice(address token) external view override returns (uint256 _amountOut) {
        _amountOut = getCrvTokenPrice(token);
    }

    /**
     * @notice Get price for curve pool tokens
     * @param token The curve pool token
     * @return The price
     */
    function getCrvTokenPrice(address token) internal view returns (uint256) {
        address pool = pools[token];
        require(pool != address(0), "Unsupported token");

        uint256 virtualPrice = CurveSwapInterface(pool).get_virtual_price();

        uint256 conversionPrice = provider.getSafePrice(conversionAsset);
        // 1 * yCRV/CRV * CRV/ETH 
        return virtualPrice * conversionPrice / 1e18;
    }

}
// File: contracts/lib/FixedPointMathLib.sol



// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity >=0.8.0;

/// @notice Arithmetic library with operations for fixed-point numbers.
/// @author Solmate (https://github.com/Rari-Capital/solmate/blob/main/src/utils/FixedPointMathLib.sol)
/// @author Inspired by USM (https://github.com/usmfum/USM/blob/master/contracts/WadMath.sol)
library FixedPointMathLib {
    /*///////////////////////////////////////////////////////////////
                    SIMPLIFIED FIXED POINT OPERATIONS
    //////////////////////////////////////////////////////////////*/

    uint256 internal constant WAD = 1e18; // The scalar of ETH and most ERC20s.

    function mulWadDown(uint256 x, uint256 y) internal pure returns (uint256) {
        return mulDivDown(x, y, WAD); // Equivalent to (x * y) / WAD rounded down.
    }

    function mulWadUp(uint256 x, uint256 y) internal pure returns (uint256) {
        return mulDivUp(x, y, WAD); // Equivalent to (x * y) / WAD rounded up.
    }

    function divWadDown(uint256 x, uint256 y) internal pure returns (uint256) {
        return mulDivDown(x, WAD, y); // Equivalent to (x * WAD) / y rounded down.
    }

    function divWadUp(uint256 x, uint256 y) internal pure returns (uint256) {
        return mulDivUp(x, WAD, y); // Equivalent to (x * WAD) / y rounded up.
    }

    /*///////////////////////////////////////////////////////////////
                    LOW LEVEL FIXED POINT OPERATIONS
    //////////////////////////////////////////////////////////////*/

    function mulDivDown(
        uint256 x,
        uint256 y,
        uint256 denominator
    ) internal pure returns (uint256 z) {
        assembly {
            // Store x * y in z for now.
            z := mul(x, y)

            // Equivalent to require(denominator != 0 && (x == 0 || (x * y) / x == y))
            if iszero(and(iszero(iszero(denominator)), or(iszero(x), eq(div(z, x), y)))) {
                revert(0, 0)
            }

            // Divide z by the denominator.
            z := div(z, denominator)
        }
    }

    function mulDivUp(
        uint256 x,
        uint256 y,
        uint256 denominator
    ) internal pure returns (uint256 z) {
        assembly {
            // Store x * y in z for now.
            z := mul(x, y)

            // Equivalent to require(denominator != 0 && (x == 0 || (x * y) / x == y))
            if iszero(and(iszero(iszero(denominator)), or(iszero(x), eq(div(z, x), y)))) {
                revert(0, 0)
            }

            // First, divide z - 1 by the denominator and add 1.
            // We allow z - 1 to underflow if z is 0, because we multiply the
            // end result by 0 if z is zero, ensuring we return 0 if z is zero.
            z := mul(iszero(iszero(z)), add(div(sub(z, 1), denominator), 1))
        }
    }

    function rpow(
        uint256 x,
        uint256 n,
        uint256 scalar
    ) internal pure returns (uint256 z) {
        assembly {
            switch x
            case 0 {
                switch n
                case 0 {
                    // 0 ** 0 = 1
                    z := scalar
                }
                default {
                    // 0 ** n = 0
                    z := 0
                }
            }
            default {
                switch mod(n, 2)
                case 0 {
                    // If n is even, store scalar in z for now.
                    z := scalar
                }
                default {
                    // If n is odd, store x in z for now.
                    z := x
                }

                // Shifting right by 1 is like dividing by 2.
                let half := shr(1, scalar)

                for {
                    // Shift n right by 1 before looping to halve it.
                    n := shr(1, n)
                } n {
                    // Shift n right by 1 each iteration to halve it.
                    n := shr(1, n)
                } {
                    // Revert immediately if x ** 2 would overflow.
                    // Equivalent to iszero(eq(div(xx, x), x)) here.
                    if shr(128, x) {
                        revert(0, 0)
                    }

                    // Store x squared.
                    let xx := mul(x, x)

                    // Round to the nearest number.
                    let xxRound := add(xx, half)

                    // Revert if xx + half overflowed.
                    if lt(xxRound, xx) {
                        revert(0, 0)
                    }

                    // Set x to scaled xxRound.
                    x := div(xxRound, scalar)

                    // If n is even:
                    if mod(n, 2) {
                        // Compute z * x.
                        let zx := mul(z, x)

                        // If z * x overflowed:
                        if iszero(eq(div(zx, x), z)) {
                            // Revert if x is non-zero.
                            if iszero(iszero(x)) {
                                revert(0, 0)
                            }
                        }

                        // Round to the nearest number.
                        let zxRound := add(zx, half)

                        // Revert if zx + half overflowed.
                        if lt(zxRound, zx) {
                            revert(0, 0)
                        }

                        // Return properly scaled zxRound.
                        z := div(zxRound, scalar)
                    }
                }
            }
        }
    }

    /*///////////////////////////////////////////////////////////////
                        GENERAL NUMBER UTILITIES
    //////////////////////////////////////////////////////////////*/

    function sqrt(uint256 x) internal pure returns (uint256 z) {
        assembly {
            // Start off with z at 1.
            z := 1

            // Used below to help find a nearby power of 2.
            let y := x

            // Find the lowest power of 2 that is at least sqrt(x).
            if iszero(lt(y, 0x100000000000000000000000000000000)) {
                y := shr(128, y) // Like dividing by 2 ** 128.
                z := shl(64, z) // Like multiplying by 2 ** 64.
            }
            if iszero(lt(y, 0x10000000000000000)) {
                y := shr(64, y) // Like dividing by 2 ** 64.
                z := shl(32, z) // Like multiplying by 2 ** 32.
            }
            if iszero(lt(y, 0x100000000)) {
                y := shr(32, y) // Like dividing by 2 ** 32.
                z := shl(16, z) // Like multiplying by 2 ** 16.
            }
            if iszero(lt(y, 0x10000)) {
                y := shr(16, y) // Like dividing by 2 ** 16.
                z := shl(8, z) // Like multiplying by 2 ** 8.
            }
            if iszero(lt(y, 0x100)) {
                y := shr(8, y) // Like dividing by 2 ** 8.
                z := shl(4, z) // Like multiplying by 2 ** 4.
            }
            if iszero(lt(y, 0x10)) {
                y := shr(4, y) // Like dividing by 2 ** 4.
                z := shl(2, z) // Like multiplying by 2 ** 2.
            }
            if iszero(lt(y, 0x8)) {
                // Equivalent to 2 ** z.
                z := shl(1, z)
            }

            // Shifting right by 1 is like dividing by 2.
            z := shr(1, add(z, div(x, z)))
            z := shr(1, add(z, div(x, z)))
            z := shr(1, add(z, div(x, z)))
            z := shr(1, add(z, div(x, z)))
            z := shr(1, add(z, div(x, z)))
            z := shr(1, add(z, div(x, z)))
            z := shr(1, add(z, div(x, z)))

            // Compute a rounded down version of z.
            let zRoundDown := div(x, z)

            // If zRoundDown is smaller, use it.
            if lt(zRoundDown, z) {
                z := zRoundDown
            }
        }
    }
}
// File: contracts/oracles/adapters/ProviderAwareOracle.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "../../interfaces/IPriceOracle.sol";
import "../../interfaces/IPriceProvider.sol";
import "@openzeppelin/contracts/access/Ownable.sol";

abstract contract ProviderAwareOracle is IPriceOracle, Ownable {

    uint internal constant PRECISION = 1 ether;

    IPriceProvider public provider;

    event ProviderTransfer(address _newProvider, address _oldProvider);

    constructor(address _provider) {
        provider = IPriceProvider(_provider);
    }

    function setPriceProvider(address _newProvider) external onlyOwner {
        address oldProvider = address(provider);
        provider = IPriceProvider(_newProvider);
        emit ProviderTransfer(_newProvider, oldProvider);
    }


}

// File: contracts/oracles/interfaces/CurveTokenInterface.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.2;

interface CurveTokenV3Interface {
    function minter() external view returns (address);
}

interface CurveSwapInterface {
    function get_virtual_price() external view returns (uint256);
}

interface CurveLPPriceInterface {
    function lp_price() external view returns (uint256);
}

// File: contracts/interfaces/IPriceOracle.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.10;

/// @dev Oracles should always return un the price in FTM with 18 decimals
interface IPriceOracle {
    /// @dev This method returns a flashloan resistant price.
    function getSafePrice(address token) external view returns (uint256 _amountOut);

    /// @dev This method has no guarantee on the safety of the price returned. It should only be
    //used if the price returned does not expose the caller contract to flashloan attacks.
    function getCurrentPrice(address token) external view returns (uint256 _amountOut);

    /// @dev This method returns a flashloan resistant price, but doesn't
    //have the view modifier which makes it convenient to update
    //a uniswap oracle which needs to maintain the TWAP regularly.
    //You can use this function while doing other state changing tx and
    //make the callers maintain the oracle.
    function updateSafePrice(address token) external returns (uint256 _amountOut);
}

// File: contracts/interfaces/IPriceProvider.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

interface IPriceProvider {

    event SetTokenOracle(address token, address oracle);

    function getSafePrice(address token) external view returns (uint256);

    function getCurrentPrice(address token) external view returns (uint256);

    function updateSafePrice(address token) external returns (uint256);

    /// Get value of an asset in units of quote
    function getValueOfAsset(address asset, address quote) external view returns (uint safePrice);

    function tokenHasOracle(address token) external view returns (bool hasOracle);

    function pairHasOracle(address token, address quote) external view returns (bool hasOracle);
}

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



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)

pragma solidity ^0.8.0;

import "../utils/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() {
        _transferOwnership(_msgSender());
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual 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 {
        _transferOwnership(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");
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

// File: @openzeppelin/contracts/utils/Context.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

pragma solidity ^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 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) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}