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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.24;

import { IOracle } from "../interfaces/IOracle.sol";
import { Math } from "@openzeppelin/contracts/utils/math/Math.sol";

interface IAggregatorV3 {
    function latestRoundData()
        external
        view
        returns (uint80 roundId, int256 answer, uint256 startedAt, uint256 updatedAt, uint80 answeredInRound);
}

// @notice Latest price update for `asset` was older than the accepted threshold
error AggV3Oracle_StalePrice(address asset);

// @title AggV3Oracle
// @notice General purpose AggregatorV3-compliant price oracle
contract AggV3Oracle is IOracle {
    using Math for uint256;

    address public immutable ASSET;
    address public immutable ASSET_FEED;
    uint256 public immutable ASSET_DECIMALS; // Decimals for ASSET
    uint256 public immutable ASSET_FEED_DECIMALS; // Decimals for ASSET_FEED
    bool public immutable ASSET_FEED_CHECK_TIMESTAMP; // True if ASSET_FEED prices must be checked for staleness
    uint256 public immutable ASSET_STALE_PRICE_THRESHOLD; // In seconds

    bool public immutable IS_USD_FEED; // True if ASSET_FEED is USD-denominated

    // If IS_USD_FEED is false, the following variables will not be set or used
    address public immutable ETH;
    address public immutable ETH_FEED;
    uint256 public immutable ETH_FEED_DECIMALS; // Decimals for ETH_FEED
    bool public immutable ETH_FEED_CHECK_TIMESTAMP; // True if ETH_FEED prices must be checked for staleness
    uint256 public immutable ETH_STALE_PRICE_THRESHOLD; // In seconds

    constructor(
        address asset,
        address assetFeed,
        uint256 assetDecimals,
        uint256 assetFeedDecimals,
        bool assetFeedCheckTimestamp,
        uint256 assetStalePriceThreshold,
        bool isUsdFeed,
        address eth,
        address ethFeed,
        uint256 ethFeedDecimals,
        bool ethFeedCheckTimestamp,
        uint256 ethStalePriceThreshold
    ) {
        ASSET = asset;
        ASSET_FEED = assetFeed;
        ASSET_DECIMALS = assetDecimals;
        ASSET_FEED_DECIMALS = assetFeedDecimals;
        ASSET_FEED_CHECK_TIMESTAMP = assetFeedCheckTimestamp;
        ASSET_STALE_PRICE_THRESHOLD = assetStalePriceThreshold;

        IS_USD_FEED = isUsdFeed; // If false, the feed is assumed to be ETH-denominated

        if (isUsdFeed) {
            ETH = eth;
            ETH_FEED = ethFeed;
            ETH_FEED_DECIMALS = ethFeedDecimals;
            ETH_FEED_CHECK_TIMESTAMP = ethFeedCheckTimestamp;
            ETH_STALE_PRICE_THRESHOLD = ethStalePriceThreshold;
        }
    }

    function getValueInEth(address, uint256 amt) external view returns (uint256 value) {
        uint256 assetPrice =
            _getPrice(ASSET_FEED, ASSET_FEED_CHECK_TIMESTAMP, ASSET_STALE_PRICE_THRESHOLD, ASSET_FEED_DECIMALS, ASSET);

        uint256 ethPrice = 1e18; // Default value when ASSET_FEED is ETH-denominated
        if (IS_USD_FEED) {
            ethPrice = _getPrice(ETH_FEED, ETH_FEED_CHECK_TIMESTAMP, ETH_STALE_PRICE_THRESHOLD, ETH_FEED_DECIMALS, ETH);
        }

        // Scale amt to 18 decimals
        uint256 scaledAmt = amt;
        if (ASSET_DECIMALS < 18) scaledAmt = amt * (10 ** (18 - ASSET_DECIMALS));
        if (ASSET_DECIMALS > 18) scaledAmt = amt / (10 ** (ASSET_DECIMALS - 18));

        return scaledAmt.mulDiv(assetPrice, ethPrice);
    }

    function _getPrice(
        address feed,
        bool checkTimestamp,
        uint256 stalePriceThreshold,
        uint256 feedDecimals,
        address asset
    )
        internal
        view
        returns (uint256 scaledPrice)
    {
        (, int256 answer,, uint256 updatedAt,) = IAggregatorV3(feed).latestRoundData();

        if (checkTimestamp) if (updatedAt < block.timestamp - stalePriceThreshold) revert AggV3Oracle_StalePrice(asset);

        scaledPrice = uint256(answer);
        if (feedDecimals < 18) scaledPrice = scaledPrice * (10 ** (18 - feedDecimals));
        if (feedDecimals > 18) scaledPrice = scaledPrice / (10 ** (feedDecimals - 18));
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/math/Math.sol)

pragma solidity ^0.8.0;

/**
 * @dev Standard math utilities missing in the Solidity language.
 */
library Math {
    enum Rounding {
        Down, // Toward negative infinity
        Up, // Toward infinity
        Zero // Toward zero
    }

    /**
     * @dev Returns the largest of two numbers.
     */
    function max(uint256 a, uint256 b) internal pure returns (uint256) {
        return a > b ? a : b;
    }

    /**
     * @dev Returns the smallest of two numbers.
     */
    function min(uint256 a, uint256 b) internal pure returns (uint256) {
        return a < b ? a : b;
    }

    /**
     * @dev Returns the average of two numbers. The result is rounded towards
     * zero.
     */
    function average(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b) / 2 can overflow.
        return (a & b) + (a ^ b) / 2;
    }

    /**
     * @dev Returns the ceiling of the division of two numbers.
     *
     * This differs from standard division with `/` in that it rounds up instead
     * of rounding down.
     */
    function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b - 1) / b can overflow on addition, so we distribute.
        return a == 0 ? 0 : (a - 1) / b + 1;
    }

    /**
     * @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or denominator == 0
     * @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv)
     * with further edits by Uniswap Labs also under MIT license.
     */
    function mulDiv(uint256 x, uint256 y, uint256 denominator) internal pure returns (uint256 result) {
        unchecked {
            // 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use
            // use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256
            // variables such that product = prod1 * 2^256 + prod0.
            uint256 prod0; // Least significant 256 bits of the product
            uint256 prod1; // Most significant 256 bits of the product
            assembly {
                let mm := mulmod(x, y, not(0))
                prod0 := mul(x, y)
                prod1 := sub(sub(mm, prod0), lt(mm, prod0))
            }

            // Handle non-overflow cases, 256 by 256 division.
            if (prod1 == 0) {
                // Solidity will revert if denominator == 0, unlike the div opcode on its own.
                // The surrounding unchecked block does not change this fact.
                // See https://docs.soliditylang.org/en/latest/control-structures.html#checked-or-unchecked-arithmetic.
                return prod0 / denominator;
            }

            // Make sure the result is less than 2^256. Also prevents denominator == 0.
            require(denominator > prod1, "Math: mulDiv overflow");

            ///////////////////////////////////////////////
            // 512 by 256 division.
            ///////////////////////////////////////////////

            // Make division exact by subtracting the remainder from [prod1 prod0].
            uint256 remainder;
            assembly {
                // Compute remainder using mulmod.
                remainder := mulmod(x, y, denominator)

                // Subtract 256 bit number from 512 bit number.
                prod1 := sub(prod1, gt(remainder, prod0))
                prod0 := sub(prod0, remainder)
            }

            // Factor powers of two out of denominator and compute largest power of two divisor of denominator. Always >= 1.
            // See https://cs.stackexchange.com/q/138556/92363.

            // Does not overflow because the denominator cannot be zero at this stage in the function.
            uint256 twos = denominator & (~denominator + 1);
            assembly {
                // Divide denominator by twos.
                denominator := div(denominator, twos)

                // Divide [prod1 prod0] by twos.
                prod0 := div(prod0, twos)

                // Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one.
                twos := add(div(sub(0, twos), twos), 1)
            }

            // Shift in bits from prod1 into prod0.
            prod0 |= prod1 * twos;

            // Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such
            // that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for
            // four bits. That is, denominator * inv = 1 mod 2^4.
            uint256 inverse = (3 * denominator) ^ 2;

            // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also works
            // in modular arithmetic, doubling the correct bits in each step.
            inverse *= 2 - denominator * inverse; // inverse mod 2^8
            inverse *= 2 - denominator * inverse; // inverse mod 2^16
            inverse *= 2 - denominator * inverse; // inverse mod 2^32
            inverse *= 2 - denominator * inverse; // inverse mod 2^64
            inverse *= 2 - denominator * inverse; // inverse mod 2^128
            inverse *= 2 - denominator * inverse; // inverse mod 2^256

            // Because the division is now exact we can divide by multiplying with the modular inverse of denominator.
            // This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is
            // less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1
            // is no longer required.
            result = prod0 * inverse;
            return result;
        }
    }

    /**
     * @notice Calculates x * y / denominator with full precision, following the selected rounding direction.
     */
    function mulDiv(uint256 x, uint256 y, uint256 denominator, Rounding rounding) internal pure returns (uint256) {
        uint256 result = mulDiv(x, y, denominator);
        if (rounding == Rounding.Up && mulmod(x, y, denominator) > 0) {
            result += 1;
        }
        return result;
    }

    /**
     * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded down.
     *
     * Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11).
     */
    function sqrt(uint256 a) internal pure returns (uint256) {
        if (a == 0) {
            return 0;
        }

        // For our first guess, we get the biggest power of 2 which is smaller than the square root of the target.
        //
        // We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have
        // `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`.
        //
        // This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)`
        // → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))`
        // → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)`
        //
        // Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit.
        uint256 result = 1 << (log2(a) >> 1);

        // At this point `result` is an estimation with one bit of precision. We know the true value is a uint128,
        // since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at
        // every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision
        // into the expected uint128 result.
        unchecked {
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            return min(result, a / result);
        }
    }

    /**
     * @notice Calculates sqrt(a), following the selected rounding direction.
     */
    function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = sqrt(a);
            return result + (rounding == Rounding.Up && result * result < a ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 2, rounded down, of a positive value.
     * Returns 0 if given 0.
     */
    function log2(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 128;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 64;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 32;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 16;
            }
            if (value >> 8 > 0) {
                value >>= 8;
                result += 8;
            }
            if (value >> 4 > 0) {
                value >>= 4;
                result += 4;
            }
            if (value >> 2 > 0) {
                value >>= 2;
                result += 2;
            }
            if (value >> 1 > 0) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 2, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log2(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log2(value);
            return result + (rounding == Rounding.Up && 1 << result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 10, rounded down, of a positive value.
     * Returns 0 if given 0.
     */
    function log10(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >= 10 ** 64) {
                value /= 10 ** 64;
                result += 64;
            }
            if (value >= 10 ** 32) {
                value /= 10 ** 32;
                result += 32;
            }
            if (value >= 10 ** 16) {
                value /= 10 ** 16;
                result += 16;
            }
            if (value >= 10 ** 8) {
                value /= 10 ** 8;
                result += 8;
            }
            if (value >= 10 ** 4) {
                value /= 10 ** 4;
                result += 4;
            }
            if (value >= 10 ** 2) {
                value /= 10 ** 2;
                result += 2;
            }
            if (value >= 10 ** 1) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 10, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log10(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log10(value);
            return result + (rounding == Rounding.Up && 10 ** result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 256, rounded down, of a positive value.
     * Returns 0 if given 0.
     *
     * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.
     */
    function log256(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 16;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 8;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 4;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 2;
            }
            if (value >> 8 > 0) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 256, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log256(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log256(value);
            return result + (rounding == Rounding.Up && 1 << (result << 3) < value ? 1 : 0);
        }
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.24;

/*//////////////////////////////////////////////////////////////
                            IOracle
//////////////////////////////////////////////////////////////*/

/// @title IOracle
/// @notice Common interface for all oracle implementations
interface IOracle {
    /// @notice Compute the equivalent ETH value for a given amount of a particular asset
    /// @param asset Address of the asset to be priced
    /// @param amt Amount of the given asset to be priced
    /// @return valueInEth Equivalent ETH value for the given asset and amount, scaled by 18 decimals
    function getValueInEth(address asset, uint256 amt) external view returns (uint256 valueInEth);
}

{
  "evmVersion": "shanghai",
  "libraries": {},
  "metadata": {
    "appendCBOR": false,
    "bytecodeHash": "none",
    "useLiteralContent": false
  },
  "optimizer": {
    "details": {
      "constantOptimizer": true,
      "yul": true,
      "yulDetails": {
        "stackAllocation": true
      }
    },
    "enabled": true,
    "runs": 1024
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "remappings": [
    "forge-std/=lib/forge-std/src/",
    "@redstone-oracles-monorepo/=lib/redstone-oracles-monorepo/",
    "@openzeppelin/contracts/=lib/openzeppelin-contracts/contracts/",
    "erc4626-tests/=lib/openzeppelin-contracts-upgradeable/lib/erc4626-tests/",
    "ds-test/=lib/openzeppelin-contracts-upgradeable/lib/forge-std/lib/ds-test/src/",
    "@openzeppelin/contracts-upgradeable/=lib/openzeppelin-contracts-upgradeable/contracts/",
    "openzeppelin-contracts-upgradeable/=lib/openzeppelin-contracts-upgradeable/",
    "openzeppelin-contracts/=lib/openzeppelin-contracts/",
    "openzeppelin/=lib/openzeppelin-contracts-upgradeable/contracts/",
    "redstone-oracles-monorepo/=lib/redstone-oracles-monorepo/"
  ],
  "viaIR": false
}

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[{"inputs":[{"internalType":"address","name":"asset","type":"address"},{"internalType":"address","name":"assetFeed","type":"address"},{"internalType":"uint256","name":"assetDecimals","type":"uint256"},{"internalType":"uint256","name":"assetFeedDecimals","type":"uint256"},{"internalType":"bool","name":"assetFeedCheckTimestamp","type":"bool"},{"internalType":"uint256","name":"assetStalePriceThreshold","type":"uint256"},{"internalType":"bool","name":"isUsdFeed","type":"bool"},{"internalType":"address","name":"eth","type":"address"},{"internalType":"address","name":"ethFeed","type":"address"},{"internalType":"uint256","name":"ethFeedDecimals","type":"uint256"},{"internalType":"bool","name":"ethFeedCheckTimestamp","type":"bool"},{"internalType":"uint256","name":"ethStalePriceThreshold","type":"uint256"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[{"internalType":"address","name":"asset","type":"address"}],"name":"AggV3Oracle_StalePrice","type":"error"},{"inputs":[],"name":"ASSET","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"ASSET_DECIMALS","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"ASSET_FEED","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"ASSET_FEED_CHECK_TIMESTAMP","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"ASSET_FEED_DECIMALS","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"ASSET_STALE_PRICE_THRESHOLD","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"ETH","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"ETH_FEED","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"ETH_FEED_CHECK_TIMESTAMP","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"ETH_FEED_DECIMALS","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"ETH_STALE_PRICE_THRESHOLD","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"IS_USD_FEED","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"uint256","name":"amt","type":"uint256"}],"name":"getValueInEth","outputs":[{"internalType":"uint256","name":"value","type":"uint256"}],"stateMutability":"view","type":"function"}]

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-----Decoded View---------------
Arg [0] : asset (address): 0x5555555555555555555555555555555555555555
Arg [1] : assetFeed (address): 0xa8a94Da411425634e3Ed6C331a32ab4fd774aa43
Arg [2] : assetDecimals (uint256): 18
Arg [3] : assetFeedDecimals (uint256): 8
Arg [4] : assetFeedCheckTimestamp (bool): True
Arg [5] : assetStalePriceThreshold (uint256): 21600
Arg [6] : isUsdFeed (bool): True
Arg [7] : eth (address): 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE
Arg [8] : ethFeed (address): 0x4BAD96DD1C7D541270a0C92e1D4e5f12EEEA7a57
Arg [9] : ethFeedDecimals (uint256): 8
Arg [10] : ethFeedCheckTimestamp (bool): True
Arg [11] : ethStalePriceThreshold (uint256): 21600

-----Encoded View---------------
12 Constructor Arguments found :
Arg [0] : 0000000000000000000000005555555555555555555555555555555555555555
Arg [1] : 000000000000000000000000a8a94da411425634e3ed6c331a32ab4fd774aa43
Arg [2] : 0000000000000000000000000000000000000000000000000000000000000012
Arg [3] : 0000000000000000000000000000000000000000000000000000000000000008
Arg [4] : 0000000000000000000000000000000000000000000000000000000000000001
Arg [5] : 0000000000000000000000000000000000000000000000000000000000005460
Arg [6] : 0000000000000000000000000000000000000000000000000000000000000001
Arg [7] : 000000000000000000000000eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
Arg [8] : 0000000000000000000000004bad96dd1c7d541270a0c92e1d4e5f12eeea7a57
Arg [9] : 0000000000000000000000000000000000000000000000000000000000000008
Arg [10] : 0000000000000000000000000000000000000000000000000000000000000001
Arg [11] : 0000000000000000000000000000000000000000000000000000000000005460