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// SPDX-License-Identifier: BUSL-1.1
pragma solidity 0.8.25;

import "../interfaces/oracles/IChainlinkOracle.sol";

import "../libraries/external/FullMath.sol";

contract ChainlinkOracle is IChainlinkOracle {
    /// @inheritdoc IChainlinkOracle
    uint256 public constant Q96 = 2 ** 96;

    /// @inheritdoc IChainlinkOracle
    mapping(address => address) public baseTokens;

    mapping(address => mapping(address => AggregatorData))
        private _aggregatorsData;

    /// @inheritdoc IChainlinkOracle
    function aggregatorsData(
        address vault,
        address token
    ) external view returns (AggregatorData memory) {
        return _aggregatorsData[vault][token];
    }

    /// @inheritdoc IChainlinkOracle
    function setBaseToken(address vault, address baseToken) external {
        IDefaultAccessControl(vault).requireAdmin(msg.sender);
        baseTokens[vault] = baseToken;
        emit ChainlinkOracleSetBaseToken(vault, baseToken, block.timestamp);
    }

    /// @inheritdoc IChainlinkOracle
    function setChainlinkOracles(
        address vault,
        address[] calldata tokens,
        AggregatorData[] calldata data_
    ) external {
        IDefaultAccessControl(vault).requireAdmin(msg.sender);
        if (tokens.length != data_.length) revert InvalidLength();
        for (uint256 i = 0; i < tokens.length; i++) {
            if (data_[i].aggregatorV3 == address(0)) continue;
            _validateAndGetPrice(data_[i]);
        }
        for (uint256 i = 0; i < tokens.length; i++) {
            _aggregatorsData[vault][tokens[i]] = data_[i];
        }
        emit ChainlinkOracleSetChainlinkOracles(
            vault,
            tokens,
            data_,
            block.timestamp
        );
    }

    function _validateAndGetPrice(
        AggregatorData memory data
    ) private view returns (uint256 answer, uint8 decimals) {
        if (data.aggregatorV3 == address(0)) revert AddressZero();
        (, int256 signedAnswer, , uint256 lastTimestamp, ) = IAggregatorV3(
            data.aggregatorV3
        ).latestRoundData();
        // The roundId and latestRound are not used in the validation process to ensure compatibility
        // with various custom aggregator implementations that may handle these parameters differently
        if (signedAnswer < 0) revert InvalidOracleData();
        answer = uint256(signedAnswer);
        if (block.timestamp - data.maxAge > lastTimestamp) revert StaleOracle();
        decimals = IAggregatorV3(data.aggregatorV3).decimals();
    }

    /// @inheritdoc IChainlinkOracle
    function getPrice(
        address vault,
        address token
    ) public view returns (uint256 answer, uint8 decimals) {
        return _validateAndGetPrice(_aggregatorsData[vault][token]);
    }

    /// @inheritdoc IPriceOracle
    function priceX96(
        address vault,
        address token
    ) external view returns (uint256 priceX96_) {
        if (vault == address(0)) revert AddressZero();
        if (token == address(0)) revert AddressZero();
        address baseToken = baseTokens[vault];
        if (baseToken == address(0)) revert AddressZero();
        if (token == baseToken) return Q96;
        (uint256 tokenPrice, uint8 decimals) = getPrice(vault, token);
        (uint256 baseTokenPrice, uint8 baseDecimals) = getPrice(
            vault,
            baseToken
        );
        priceX96_ = FullMath.mulDiv(
            tokenPrice * 10 ** baseDecimals,
            Q96,
            baseTokenPrice * 10 ** decimals
        );
    }
}

// SPDX-License-Identifier: BUSL-1.1
pragma solidity 0.8.25;

import "../utils/IDefaultAccessControl.sol";
import "../external/chainlink/IAggregatorV3.sol";

import "./IPriceOracle.sol";

/**
 * @title IChainlinkOracle
 * @notice Interface defining a price oracle that uses Chainlink data.
 */
interface IChainlinkOracle is IPriceOracle {
    /// @dev Errors
    error AddressZero();
    error InvalidLength();
    error Forbidden();
    error StaleOracle();
    error InvalidOracleData();

    /// @notice Struct containing Chainlink oracle data.
    /// @param aggregatorV3 The address of the Chainlink aggregator.
    /// @param maxAge The maximum allowable age for an oracle result before it's considered stale.
    struct AggregatorData {
        address aggregatorV3;
        uint256 maxAge;
    }

    /**
     * @notice Returns the constant Q96 used for ratio calculations with 96-bit precision.
     * @return uint256 The value of Q96 (2^96) for ratio calculations.
     */
    function Q96() external view returns (uint256);

    /**
     * @notice Returns the Chainlink price aggregator address for a specific vault and token.
     * @param vault The address of the vault.
     * @param token The address of the token.
     * @return data The Chainlink oracle data for the token.
     */
    function aggregatorsData(
        address vault,
        address token
    ) external view returns (AggregatorData memory data);

    /**
     * @notice Returns the base token associated with a specific vault.
     * @param vault The address of the vault.
     * @return address of the base token.
     */
    function baseTokens(address vault) external view returns (address);

    /**
     * @notice Sets the base token for a specific vault.
     * @param vault The address of the vault to set the base token for.
     * @param baseToken The address of the base token to associate with the vault.
     */
    function setBaseToken(address vault, address baseToken) external;

    /**
     * @notice Sets Chainlink price oracles for a given vault and an array of tokens.
     * @param vault The address of the vault to associate the tokens and oracles with.
     * @param tokens An array of token addresses that require price data.
     * @param aggregatorsData An array of Chainlink oracle addresses set with max allowed ages for the tokens.
     * @dev Both arrays should have the same length.
     */
    function setChainlinkOracles(
        address vault,
        address[] memory tokens,
        AggregatorData[] memory aggregatorsData
    ) external;

    /**
     * @notice Retrieves the latest price for a specific token from a given vault's associated Chainlink oracle.
     * @param vault The address of the vault requesting the price.
     * @param token The address of the token to get the price for.
     * @return answer The latest price of the token.
     * @return decimals The number of decimals used by the Chainlink oracle for this price.
     * @dev Reverts with `StaleOracle` if the price data is too old.
     */
    function getPrice(
        address vault,
        address token
    ) external view returns (uint256 answer, uint8 decimals);

    /**
     * @notice Emitted when the base token is set for a specific vault in the Chainlink Oracle.
     * @param vault The address of the vault for which the base token is set.
     * @param baseToken The address of the base token set for the vault.
     * @param timestamp The timestamp when the base token is set.
     */
    event ChainlinkOracleSetBaseToken(
        address indexed vault,
        address baseToken,
        uint256 timestamp
    );

    /**
     * @notice Emitted when Chainlink oracles are set for a specific vault in the Chainlink Oracle.
     * @param vault The address of the vault for which Chainlink oracles are set.
     * @param tokens An array of token addresses for which Chainlink oracles are set.
     * @param aggregatorsData An array of Chainlink oracle addresses set with max allowed ages for the tokens.
     * @param timestamp The timestamp when Chainlink oracles are set.
     */
    event ChainlinkOracleSetChainlinkOracles(
        address indexed vault,
        address[] tokens,
        AggregatorData[] aggregatorsData,
        uint256 timestamp
    );
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.25;

/// @title Contains 512-bit math functions
/// @notice Facilitates multiplication and division that can have overflow of an intermediate value without any loss of precision
/// @dev Handles "phantom overflow" i.e., allows multiplication and division where an intermediate value overflows 256 bits
library FullMath {
    /// @notice Calculates floor(a×b÷denominator) with full precision. Throws if result overflows a uint256 or denominator == 0
    /// @param a The multiplicand
    /// @param b The multiplier
    /// @param denominator The divisor
    /// @return result The 256-bit result
    /// @dev Credit to Remco Bloemen under MIT license https://xn--2-umb.com/21/muldiv
    function mulDiv(
        uint256 a,
        uint256 b,
        uint256 denominator
    ) internal pure returns (uint256 result) {
        // diff: original lib works under 0.7.6 with overflows enabled
        unchecked {
            // 512-bit multiply [prod1 prod0] = a * b
            // Compute the product mod 2**256 and mod 2**256 - 1
            // then 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(a, b, not(0))
                prod0 := mul(a, b)
                prod1 := sub(sub(mm, prod0), lt(mm, prod0))
            }

            // Handle non-overflow cases, 256 by 256 division
            if (prod1 == 0) {
                require(denominator > 0);
                assembly {
                    result := div(prod0, denominator)
                }
                return result;
            }

            // Make sure the result is less than 2**256.
            // Also prevents denominator == 0
            require(denominator > prod1);

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

            // Make division exact by subtracting the remainder from [prod1 prod0]
            // Compute remainder using mulmod
            uint256 remainder;
            assembly {
                remainder := mulmod(a, b, denominator)
            }
            // Subtract 256 bit number from 512 bit number
            assembly {
                prod1 := sub(prod1, gt(remainder, prod0))
                prod0 := sub(prod0, remainder)
            }

            // Factor powers of two out of denominator
            // Compute largest power of two divisor of denominator.
            // Always >= 1.
            // diff: original uint256 twos = -denominator & denominator;
            uint256 twos = uint256(-int256(denominator)) & denominator;
            // Divide denominator by power of two
            assembly {
                denominator := div(denominator, twos)
            }

            // Divide [prod1 prod0] by the factors of two
            assembly {
                prod0 := div(prod0, twos)
            }
            // Shift in bits from prod1 into prod0. For this we need
            // to flip `twos` such that it is 2**256 / twos.
            // If twos is zero, then it becomes one
            assembly {
                twos := add(div(sub(0, twos), twos), 1)
            }
            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
            // correct for four bits. That is, denominator * inv = 1 mod 2**4
            uint256 inv = (3 * denominator) ^ 2;
            // Now use 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.
            inv *= 2 - denominator * inv; // inverse mod 2**8
            inv *= 2 - denominator * inv; // inverse mod 2**16
            inv *= 2 - denominator * inv; // inverse mod 2**32
            inv *= 2 - denominator * inv; // inverse mod 2**64
            inv *= 2 - denominator * inv; // inverse mod 2**128
            inv *= 2 - denominator * inv; // 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 precoditions 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 * inv;
            return result;
        }
    }

    /// @notice Calculates ceil(a×b÷denominator) with full precision. Throws if result overflows a uint256 or denominator == 0
    /// @param a The multiplicand
    /// @param b The multiplier
    /// @param denominator The divisor
    /// @return result The 256-bit result
    function mulDivRoundingUp(
        uint256 a,
        uint256 b,
        uint256 denominator
    ) internal pure returns (uint256 result) {
        // diff: original lib works under 0.7.6 with overflows enabled
        unchecked {
            result = mulDiv(a, b, denominator);
            if (mulmod(a, b, denominator) > 0) {
                require(result < type(uint256).max);
                result++;
            }
        }
    }
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.25;

import "@openzeppelin/contracts/access/extensions/IAccessControlEnumerable.sol";

/// @notice This is a default access control with 3 roles:
///
/// - ADMIN: allowed to do anything
/// - ADMIN_DELEGATE: allowed to do anything except assigning ADMIN and ADMIN_DELEGATE roles
/// - OPERATOR: low-privileged role, generally keeper or some other bot
interface IDefaultAccessControl is IAccessControlEnumerable {
    error Forbidden();
    error AddressZero();

    function OPERATOR() external view returns (bytes32);

    function ADMIN_ROLE() external view returns (bytes32);

    function ADMIN_DELEGATE_ROLE() external view returns (bytes32);

    /// @notice Checks that the address is contract admin.
    /// @param who Address to check
    /// @return `true` if who is admin, `false` otherwise
    function isAdmin(address who) external view returns (bool);

    /// @notice Checks that the address is contract admin.
    /// @param who Address to check
    /// @return `true` if who is operator, `false` otherwise
    function isOperator(address who) external view returns (bool);

    /// @notice Checks that the address is contract admin.
    /// @param who Address to check
    /// @dev throws Forbbiden() if the sender does not have the admin or admin_delegate role
    function requireAdmin(address who) external view;

    /// @notice Checks that the address is contract admin.
    /// @param who Address to check
    /// @dev throws Forbbiden() if the sender has no roles
    function requireAtLeastOperator(address who) external view;
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.25;

interface IAggregatorV3 {
    function decimals() external view returns (uint8);

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

// SPDX-License-Identifier: BUSL-1.1
pragma solidity 0.8.25;

/**
 * @title IPriceOracle
 * @notice Interface defining a standard price oracle that provides token prices in 96-bit precision.
 */
interface IPriceOracle {
    /**
     * @notice Returns the price of a specific token relative to the base token of the given vault, expressed in 96-bit precision.
     * @param vault The address of the vault requesting the price.
     * @param token The address of the token to calculate the price for.
     * @return priceX96_ The price of the token relative to the base token, using 96-bit precision.
     * @dev Implementations should ensure prices are accurate and may involve external oracle data.
     *      Reverts with an appropriate error if the price cannot be provided.
     */
    function priceX96(
        address vault,
        address token
    ) external view returns (uint256 priceX96_);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (access/extensions/IAccessControlEnumerable.sol)

pragma solidity ^0.8.20;

import {IAccessControl} from "../IAccessControl.sol";

/**
 * @dev External interface of AccessControlEnumerable declared to support ERC165 detection.
 */
interface IAccessControlEnumerable is IAccessControl {
    /**
     * @dev Returns one of the accounts that have `role`. `index` must be a
     * value between 0 and {getRoleMemberCount}, non-inclusive.
     *
     * Role bearers are not sorted in any particular way, and their ordering may
     * change at any point.
     *
     * WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure
     * you perform all queries on the same block. See the following
     * https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296[forum post]
     * for more information.
     */
    function getRoleMember(bytes32 role, uint256 index) external view returns (address);

    /**
     * @dev Returns the number of accounts that have `role`. Can be used
     * together with {getRoleMember} to enumerate all bearers of a role.
     */
    function getRoleMemberCount(bytes32 role) external view returns (uint256);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (access/IAccessControl.sol)

pragma solidity ^0.8.20;

/**
 * @dev External interface of AccessControl declared to support ERC165 detection.
 */
interface IAccessControl {
    /**
     * @dev The `account` is missing a role.
     */
    error AccessControlUnauthorizedAccount(address account, bytes32 neededRole);

    /**
     * @dev The caller of a function is not the expected one.
     *
     * NOTE: Don't confuse with {AccessControlUnauthorizedAccount}.
     */
    error AccessControlBadConfirmation();

    /**
     * @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`
     *
     * `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite
     * {RoleAdminChanged} not being emitted signaling this.
     */
    event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole);

    /**
     * @dev Emitted when `account` is granted `role`.
     *
     * `sender` is the account that originated the contract call, an admin role
     * bearer except when using {AccessControl-_setupRole}.
     */
    event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);

    /**
     * @dev Emitted when `account` is revoked `role`.
     *
     * `sender` is the account that originated the contract call:
     *   - if using `revokeRole`, it is the admin role bearer
     *   - if using `renounceRole`, it is the role bearer (i.e. `account`)
     */
    event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);

    /**
     * @dev Returns `true` if `account` has been granted `role`.
     */
    function hasRole(bytes32 role, address account) external view returns (bool);

    /**
     * @dev Returns the admin role that controls `role`. See {grantRole} and
     * {revokeRole}.
     *
     * To change a role's admin, use {AccessControl-_setRoleAdmin}.
     */
    function getRoleAdmin(bytes32 role) external view returns (bytes32);

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     */
    function grantRole(bytes32 role, address account) external;

    /**
     * @dev Revokes `role` from `account`.
     *
     * If `account` had been granted `role`, emits a {RoleRevoked} event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     */
    function revokeRole(bytes32 role, address account) external;

    /**
     * @dev Revokes `role` from the calling account.
     *
     * Roles are often managed via {grantRole} and {revokeRole}: this function's
     * purpose is to provide a mechanism for accounts to lose their privileges
     * if they are compromised (such as when a trusted device is misplaced).
     *
     * If the calling account had been granted `role`, emits a {RoleRevoked}
     * event.
     *
     * Requirements:
     *
     * - the caller must be `callerConfirmation`.
     */
    function renounceRole(bytes32 role, address callerConfirmation) external;
}

{
  "remappings": [
    "ds-test/=lib/forge-std/lib/ds-test/src/",
    "forge-std/=lib/forge-std/src/",
    "@openzeppelin/contracts/=lib/openzeppelin-contracts/contracts/",
    "erc4626-tests/=lib/openzeppelin-contracts/lib/erc4626-tests/",
    "openzeppelin-contracts/=lib/openzeppelin-contracts/"
  ],
  "optimizer": {
    "enabled": true,
    "runs": 200,
    "details": {
      "yul": true,
      "yulDetails": {
        "stackAllocation": true
      }
    }
  },
  "metadata": {
    "useLiteralContent": false,
    "bytecodeHash": "ipfs",
    "appendCBOR": true
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "evmVersion": "paris",
  "viaIR": false,
  "libraries": {}
}

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[{"inputs":[],"name":"AddressZero","type":"error"},{"inputs":[],"name":"Forbidden","type":"error"},{"inputs":[],"name":"InvalidLength","type":"error"},{"inputs":[],"name":"InvalidOracleData","type":"error"},{"inputs":[],"name":"StaleOracle","type":"error"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"vault","type":"address"},{"indexed":false,"internalType":"address","name":"baseToken","type":"address"},{"indexed":false,"internalType":"uint256","name":"timestamp","type":"uint256"}],"name":"ChainlinkOracleSetBaseToken","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"vault","type":"address"},{"indexed":false,"internalType":"address[]","name":"tokens","type":"address[]"},{"components":[{"internalType":"address","name":"aggregatorV3","type":"address"},{"internalType":"uint256","name":"maxAge","type":"uint256"}],"indexed":false,"internalType":"struct IChainlinkOracle.AggregatorData[]","name":"aggregatorsData","type":"tuple[]"},{"indexed":false,"internalType":"uint256","name":"timestamp","type":"uint256"}],"name":"ChainlinkOracleSetChainlinkOracles","type":"event"},{"inputs":[],"name":"Q96","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"vault","type":"address"},{"internalType":"address","name":"token","type":"address"}],"name":"aggregatorsData","outputs":[{"components":[{"internalType":"address","name":"aggregatorV3","type":"address"},{"internalType":"uint256","name":"maxAge","type":"uint256"}],"internalType":"struct IChainlinkOracle.AggregatorData","name":"","type":"tuple"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"baseTokens","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"vault","type":"address"},{"internalType":"address","name":"token","type":"address"}],"name":"getPrice","outputs":[{"internalType":"uint256","name":"answer","type":"uint256"},{"internalType":"uint8","name":"decimals","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"vault","type":"address"},{"internalType":"address","name":"token","type":"address"}],"name":"priceX96","outputs":[{"internalType":"uint256","name":"priceX96_","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"vault","type":"address"},{"internalType":"address","name":"baseToken","type":"address"}],"name":"setBaseToken","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"vault","type":"address"},{"internalType":"address[]","name":"tokens","type":"address[]"},{"components":[{"internalType":"address","name":"aggregatorV3","type":"address"},{"internalType":"uint256","name":"maxAge","type":"uint256"}],"internalType":"struct IChainlinkOracle.AggregatorData[]","name":"data_","type":"tuple[]"}],"name":"setChainlinkOracles","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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