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



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @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);

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

// File: @openzeppelin/contracts/utils/math/SafeCast.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SafeCast.sol)
// This file was procedurally generated from scripts/generate/templates/SafeCast.js.

pragma solidity ^0.8.0;

/**
 * @dev Wrappers over Solidity's uintXX/intXX casting operators with added overflow
 * checks.
 *
 * Downcasting from uint256/int256 in Solidity does not revert on overflow. This can
 * easily result in undesired exploitation or bugs, since developers usually
 * assume that overflows raise errors. `SafeCast` restores this intuition by
 * reverting the transaction when such an operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 *
 * Can be combined with {SafeMath} and {SignedSafeMath} to extend it to smaller types, by performing
 * all math on `uint256` and `int256` and then downcasting.
 */
library SafeCast {
    /**
     * @dev Returns the downcasted uint248 from uint256, reverting on
     * overflow (when the input is greater than largest uint248).
     *
     * Counterpart to Solidity's `uint248` operator.
     *
     * Requirements:
     *
     * - input must fit into 248 bits
     *
     * _Available since v4.7._
     */
    function toUint248(uint256 value) internal pure returns (uint248) {
        require(value <= type(uint248).max, "SafeCast: value doesn't fit in 248 bits");
        return uint248(value);
    }

    /**
     * @dev Returns the downcasted uint240 from uint256, reverting on
     * overflow (when the input is greater than largest uint240).
     *
     * Counterpart to Solidity's `uint240` operator.
     *
     * Requirements:
     *
     * - input must fit into 240 bits
     *
     * _Available since v4.7._
     */
    function toUint240(uint256 value) internal pure returns (uint240) {
        require(value <= type(uint240).max, "SafeCast: value doesn't fit in 240 bits");
        return uint240(value);
    }

    /**
     * @dev Returns the downcasted uint232 from uint256, reverting on
     * overflow (when the input is greater than largest uint232).
     *
     * Counterpart to Solidity's `uint232` operator.
     *
     * Requirements:
     *
     * - input must fit into 232 bits
     *
     * _Available since v4.7._
     */
    function toUint232(uint256 value) internal pure returns (uint232) {
        require(value <= type(uint232).max, "SafeCast: value doesn't fit in 232 bits");
        return uint232(value);
    }

    /**
     * @dev Returns the downcasted uint224 from uint256, reverting on
     * overflow (when the input is greater than largest uint224).
     *
     * Counterpart to Solidity's `uint224` operator.
     *
     * Requirements:
     *
     * - input must fit into 224 bits
     *
     * _Available since v4.2._
     */
    function toUint224(uint256 value) internal pure returns (uint224) {
        require(value <= type(uint224).max, "SafeCast: value doesn't fit in 224 bits");
        return uint224(value);
    }

    /**
     * @dev Returns the downcasted uint216 from uint256, reverting on
     * overflow (when the input is greater than largest uint216).
     *
     * Counterpart to Solidity's `uint216` operator.
     *
     * Requirements:
     *
     * - input must fit into 216 bits
     *
     * _Available since v4.7._
     */
    function toUint216(uint256 value) internal pure returns (uint216) {
        require(value <= type(uint216).max, "SafeCast: value doesn't fit in 216 bits");
        return uint216(value);
    }

    /**
     * @dev Returns the downcasted uint208 from uint256, reverting on
     * overflow (when the input is greater than largest uint208).
     *
     * Counterpart to Solidity's `uint208` operator.
     *
     * Requirements:
     *
     * - input must fit into 208 bits
     *
     * _Available since v4.7._
     */
    function toUint208(uint256 value) internal pure returns (uint208) {
        require(value <= type(uint208).max, "SafeCast: value doesn't fit in 208 bits");
        return uint208(value);
    }

    /**
     * @dev Returns the downcasted uint200 from uint256, reverting on
     * overflow (when the input is greater than largest uint200).
     *
     * Counterpart to Solidity's `uint200` operator.
     *
     * Requirements:
     *
     * - input must fit into 200 bits
     *
     * _Available since v4.7._
     */
    function toUint200(uint256 value) internal pure returns (uint200) {
        require(value <= type(uint200).max, "SafeCast: value doesn't fit in 200 bits");
        return uint200(value);
    }

    /**
     * @dev Returns the downcasted uint192 from uint256, reverting on
     * overflow (when the input is greater than largest uint192).
     *
     * Counterpart to Solidity's `uint192` operator.
     *
     * Requirements:
     *
     * - input must fit into 192 bits
     *
     * _Available since v4.7._
     */
    function toUint192(uint256 value) internal pure returns (uint192) {
        require(value <= type(uint192).max, "SafeCast: value doesn't fit in 192 bits");
        return uint192(value);
    }

    /**
     * @dev Returns the downcasted uint184 from uint256, reverting on
     * overflow (when the input is greater than largest uint184).
     *
     * Counterpart to Solidity's `uint184` operator.
     *
     * Requirements:
     *
     * - input must fit into 184 bits
     *
     * _Available since v4.7._
     */
    function toUint184(uint256 value) internal pure returns (uint184) {
        require(value <= type(uint184).max, "SafeCast: value doesn't fit in 184 bits");
        return uint184(value);
    }

    /**
     * @dev Returns the downcasted uint176 from uint256, reverting on
     * overflow (when the input is greater than largest uint176).
     *
     * Counterpart to Solidity's `uint176` operator.
     *
     * Requirements:
     *
     * - input must fit into 176 bits
     *
     * _Available since v4.7._
     */
    function toUint176(uint256 value) internal pure returns (uint176) {
        require(value <= type(uint176).max, "SafeCast: value doesn't fit in 176 bits");
        return uint176(value);
    }

    /**
     * @dev Returns the downcasted uint168 from uint256, reverting on
     * overflow (when the input is greater than largest uint168).
     *
     * Counterpart to Solidity's `uint168` operator.
     *
     * Requirements:
     *
     * - input must fit into 168 bits
     *
     * _Available since v4.7._
     */
    function toUint168(uint256 value) internal pure returns (uint168) {
        require(value <= type(uint168).max, "SafeCast: value doesn't fit in 168 bits");
        return uint168(value);
    }

    /**
     * @dev Returns the downcasted uint160 from uint256, reverting on
     * overflow (when the input is greater than largest uint160).
     *
     * Counterpart to Solidity's `uint160` operator.
     *
     * Requirements:
     *
     * - input must fit into 160 bits
     *
     * _Available since v4.7._
     */
    function toUint160(uint256 value) internal pure returns (uint160) {
        require(value <= type(uint160).max, "SafeCast: value doesn't fit in 160 bits");
        return uint160(value);
    }

    /**
     * @dev Returns the downcasted uint152 from uint256, reverting on
     * overflow (when the input is greater than largest uint152).
     *
     * Counterpart to Solidity's `uint152` operator.
     *
     * Requirements:
     *
     * - input must fit into 152 bits
     *
     * _Available since v4.7._
     */
    function toUint152(uint256 value) internal pure returns (uint152) {
        require(value <= type(uint152).max, "SafeCast: value doesn't fit in 152 bits");
        return uint152(value);
    }

    /**
     * @dev Returns the downcasted uint144 from uint256, reverting on
     * overflow (when the input is greater than largest uint144).
     *
     * Counterpart to Solidity's `uint144` operator.
     *
     * Requirements:
     *
     * - input must fit into 144 bits
     *
     * _Available since v4.7._
     */
    function toUint144(uint256 value) internal pure returns (uint144) {
        require(value <= type(uint144).max, "SafeCast: value doesn't fit in 144 bits");
        return uint144(value);
    }

    /**
     * @dev Returns the downcasted uint136 from uint256, reverting on
     * overflow (when the input is greater than largest uint136).
     *
     * Counterpart to Solidity's `uint136` operator.
     *
     * Requirements:
     *
     * - input must fit into 136 bits
     *
     * _Available since v4.7._
     */
    function toUint136(uint256 value) internal pure returns (uint136) {
        require(value <= type(uint136).max, "SafeCast: value doesn't fit in 136 bits");
        return uint136(value);
    }

    /**
     * @dev Returns the downcasted uint128 from uint256, reverting on
     * overflow (when the input is greater than largest uint128).
     *
     * Counterpart to Solidity's `uint128` operator.
     *
     * Requirements:
     *
     * - input must fit into 128 bits
     *
     * _Available since v2.5._
     */
    function toUint128(uint256 value) internal pure returns (uint128) {
        require(value <= type(uint128).max, "SafeCast: value doesn't fit in 128 bits");
        return uint128(value);
    }

    /**
     * @dev Returns the downcasted uint120 from uint256, reverting on
     * overflow (when the input is greater than largest uint120).
     *
     * Counterpart to Solidity's `uint120` operator.
     *
     * Requirements:
     *
     * - input must fit into 120 bits
     *
     * _Available since v4.7._
     */
    function toUint120(uint256 value) internal pure returns (uint120) {
        require(value <= type(uint120).max, "SafeCast: value doesn't fit in 120 bits");
        return uint120(value);
    }

    /**
     * @dev Returns the downcasted uint112 from uint256, reverting on
     * overflow (when the input is greater than largest uint112).
     *
     * Counterpart to Solidity's `uint112` operator.
     *
     * Requirements:
     *
     * - input must fit into 112 bits
     *
     * _Available since v4.7._
     */
    function toUint112(uint256 value) internal pure returns (uint112) {
        require(value <= type(uint112).max, "SafeCast: value doesn't fit in 112 bits");
        return uint112(value);
    }

    /**
     * @dev Returns the downcasted uint104 from uint256, reverting on
     * overflow (when the input is greater than largest uint104).
     *
     * Counterpart to Solidity's `uint104` operator.
     *
     * Requirements:
     *
     * - input must fit into 104 bits
     *
     * _Available since v4.7._
     */
    function toUint104(uint256 value) internal pure returns (uint104) {
        require(value <= type(uint104).max, "SafeCast: value doesn't fit in 104 bits");
        return uint104(value);
    }

    /**
     * @dev Returns the downcasted uint96 from uint256, reverting on
     * overflow (when the input is greater than largest uint96).
     *
     * Counterpart to Solidity's `uint96` operator.
     *
     * Requirements:
     *
     * - input must fit into 96 bits
     *
     * _Available since v4.2._
     */
    function toUint96(uint256 value) internal pure returns (uint96) {
        require(value <= type(uint96).max, "SafeCast: value doesn't fit in 96 bits");
        return uint96(value);
    }

    /**
     * @dev Returns the downcasted uint88 from uint256, reverting on
     * overflow (when the input is greater than largest uint88).
     *
     * Counterpart to Solidity's `uint88` operator.
     *
     * Requirements:
     *
     * - input must fit into 88 bits
     *
     * _Available since v4.7._
     */
    function toUint88(uint256 value) internal pure returns (uint88) {
        require(value <= type(uint88).max, "SafeCast: value doesn't fit in 88 bits");
        return uint88(value);
    }

    /**
     * @dev Returns the downcasted uint80 from uint256, reverting on
     * overflow (when the input is greater than largest uint80).
     *
     * Counterpart to Solidity's `uint80` operator.
     *
     * Requirements:
     *
     * - input must fit into 80 bits
     *
     * _Available since v4.7._
     */
    function toUint80(uint256 value) internal pure returns (uint80) {
        require(value <= type(uint80).max, "SafeCast: value doesn't fit in 80 bits");
        return uint80(value);
    }

    /**
     * @dev Returns the downcasted uint72 from uint256, reverting on
     * overflow (when the input is greater than largest uint72).
     *
     * Counterpart to Solidity's `uint72` operator.
     *
     * Requirements:
     *
     * - input must fit into 72 bits
     *
     * _Available since v4.7._
     */
    function toUint72(uint256 value) internal pure returns (uint72) {
        require(value <= type(uint72).max, "SafeCast: value doesn't fit in 72 bits");
        return uint72(value);
    }

    /**
     * @dev Returns the downcasted uint64 from uint256, reverting on
     * overflow (when the input is greater than largest uint64).
     *
     * Counterpart to Solidity's `uint64` operator.
     *
     * Requirements:
     *
     * - input must fit into 64 bits
     *
     * _Available since v2.5._
     */
    function toUint64(uint256 value) internal pure returns (uint64) {
        require(value <= type(uint64).max, "SafeCast: value doesn't fit in 64 bits");
        return uint64(value);
    }

    /**
     * @dev Returns the downcasted uint56 from uint256, reverting on
     * overflow (when the input is greater than largest uint56).
     *
     * Counterpart to Solidity's `uint56` operator.
     *
     * Requirements:
     *
     * - input must fit into 56 bits
     *
     * _Available since v4.7._
     */
    function toUint56(uint256 value) internal pure returns (uint56) {
        require(value <= type(uint56).max, "SafeCast: value doesn't fit in 56 bits");
        return uint56(value);
    }

    /**
     * @dev Returns the downcasted uint48 from uint256, reverting on
     * overflow (when the input is greater than largest uint48).
     *
     * Counterpart to Solidity's `uint48` operator.
     *
     * Requirements:
     *
     * - input must fit into 48 bits
     *
     * _Available since v4.7._
     */
    function toUint48(uint256 value) internal pure returns (uint48) {
        require(value <= type(uint48).max, "SafeCast: value doesn't fit in 48 bits");
        return uint48(value);
    }

    /**
     * @dev Returns the downcasted uint40 from uint256, reverting on
     * overflow (when the input is greater than largest uint40).
     *
     * Counterpart to Solidity's `uint40` operator.
     *
     * Requirements:
     *
     * - input must fit into 40 bits
     *
     * _Available since v4.7._
     */
    function toUint40(uint256 value) internal pure returns (uint40) {
        require(value <= type(uint40).max, "SafeCast: value doesn't fit in 40 bits");
        return uint40(value);
    }

    /**
     * @dev Returns the downcasted uint32 from uint256, reverting on
     * overflow (when the input is greater than largest uint32).
     *
     * Counterpart to Solidity's `uint32` operator.
     *
     * Requirements:
     *
     * - input must fit into 32 bits
     *
     * _Available since v2.5._
     */
    function toUint32(uint256 value) internal pure returns (uint32) {
        require(value <= type(uint32).max, "SafeCast: value doesn't fit in 32 bits");
        return uint32(value);
    }

    /**
     * @dev Returns the downcasted uint24 from uint256, reverting on
     * overflow (when the input is greater than largest uint24).
     *
     * Counterpart to Solidity's `uint24` operator.
     *
     * Requirements:
     *
     * - input must fit into 24 bits
     *
     * _Available since v4.7._
     */
    function toUint24(uint256 value) internal pure returns (uint24) {
        require(value <= type(uint24).max, "SafeCast: value doesn't fit in 24 bits");
        return uint24(value);
    }

    /**
     * @dev Returns the downcasted uint16 from uint256, reverting on
     * overflow (when the input is greater than largest uint16).
     *
     * Counterpart to Solidity's `uint16` operator.
     *
     * Requirements:
     *
     * - input must fit into 16 bits
     *
     * _Available since v2.5._
     */
    function toUint16(uint256 value) internal pure returns (uint16) {
        require(value <= type(uint16).max, "SafeCast: value doesn't fit in 16 bits");
        return uint16(value);
    }

    /**
     * @dev Returns the downcasted uint8 from uint256, reverting on
     * overflow (when the input is greater than largest uint8).
     *
     * Counterpart to Solidity's `uint8` operator.
     *
     * Requirements:
     *
     * - input must fit into 8 bits
     *
     * _Available since v2.5._
     */
    function toUint8(uint256 value) internal pure returns (uint8) {
        require(value <= type(uint8).max, "SafeCast: value doesn't fit in 8 bits");
        return uint8(value);
    }

    /**
     * @dev Converts a signed int256 into an unsigned uint256.
     *
     * Requirements:
     *
     * - input must be greater than or equal to 0.
     *
     * _Available since v3.0._
     */
    function toUint256(int256 value) internal pure returns (uint256) {
        require(value >= 0, "SafeCast: value must be positive");
        return uint256(value);
    }

    /**
     * @dev Returns the downcasted int248 from int256, reverting on
     * overflow (when the input is less than smallest int248 or
     * greater than largest int248).
     *
     * Counterpart to Solidity's `int248` operator.
     *
     * Requirements:
     *
     * - input must fit into 248 bits
     *
     * _Available since v4.7._
     */
    function toInt248(int256 value) internal pure returns (int248 downcasted) {
        downcasted = int248(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 248 bits");
    }

    /**
     * @dev Returns the downcasted int240 from int256, reverting on
     * overflow (when the input is less than smallest int240 or
     * greater than largest int240).
     *
     * Counterpart to Solidity's `int240` operator.
     *
     * Requirements:
     *
     * - input must fit into 240 bits
     *
     * _Available since v4.7._
     */
    function toInt240(int256 value) internal pure returns (int240 downcasted) {
        downcasted = int240(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 240 bits");
    }

    /**
     * @dev Returns the downcasted int232 from int256, reverting on
     * overflow (when the input is less than smallest int232 or
     * greater than largest int232).
     *
     * Counterpart to Solidity's `int232` operator.
     *
     * Requirements:
     *
     * - input must fit into 232 bits
     *
     * _Available since v4.7._
     */
    function toInt232(int256 value) internal pure returns (int232 downcasted) {
        downcasted = int232(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 232 bits");
    }

    /**
     * @dev Returns the downcasted int224 from int256, reverting on
     * overflow (when the input is less than smallest int224 or
     * greater than largest int224).
     *
     * Counterpart to Solidity's `int224` operator.
     *
     * Requirements:
     *
     * - input must fit into 224 bits
     *
     * _Available since v4.7._
     */
    function toInt224(int256 value) internal pure returns (int224 downcasted) {
        downcasted = int224(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 224 bits");
    }

    /**
     * @dev Returns the downcasted int216 from int256, reverting on
     * overflow (when the input is less than smallest int216 or
     * greater than largest int216).
     *
     * Counterpart to Solidity's `int216` operator.
     *
     * Requirements:
     *
     * - input must fit into 216 bits
     *
     * _Available since v4.7._
     */
    function toInt216(int256 value) internal pure returns (int216 downcasted) {
        downcasted = int216(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 216 bits");
    }

    /**
     * @dev Returns the downcasted int208 from int256, reverting on
     * overflow (when the input is less than smallest int208 or
     * greater than largest int208).
     *
     * Counterpart to Solidity's `int208` operator.
     *
     * Requirements:
     *
     * - input must fit into 208 bits
     *
     * _Available since v4.7._
     */
    function toInt208(int256 value) internal pure returns (int208 downcasted) {
        downcasted = int208(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 208 bits");
    }

    /**
     * @dev Returns the downcasted int200 from int256, reverting on
     * overflow (when the input is less than smallest int200 or
     * greater than largest int200).
     *
     * Counterpart to Solidity's `int200` operator.
     *
     * Requirements:
     *
     * - input must fit into 200 bits
     *
     * _Available since v4.7._
     */
    function toInt200(int256 value) internal pure returns (int200 downcasted) {
        downcasted = int200(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 200 bits");
    }

    /**
     * @dev Returns the downcasted int192 from int256, reverting on
     * overflow (when the input is less than smallest int192 or
     * greater than largest int192).
     *
     * Counterpart to Solidity's `int192` operator.
     *
     * Requirements:
     *
     * - input must fit into 192 bits
     *
     * _Available since v4.7._
     */
    function toInt192(int256 value) internal pure returns (int192 downcasted) {
        downcasted = int192(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 192 bits");
    }

    /**
     * @dev Returns the downcasted int184 from int256, reverting on
     * overflow (when the input is less than smallest int184 or
     * greater than largest int184).
     *
     * Counterpart to Solidity's `int184` operator.
     *
     * Requirements:
     *
     * - input must fit into 184 bits
     *
     * _Available since v4.7._
     */
    function toInt184(int256 value) internal pure returns (int184 downcasted) {
        downcasted = int184(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 184 bits");
    }

    /**
     * @dev Returns the downcasted int176 from int256, reverting on
     * overflow (when the input is less than smallest int176 or
     * greater than largest int176).
     *
     * Counterpart to Solidity's `int176` operator.
     *
     * Requirements:
     *
     * - input must fit into 176 bits
     *
     * _Available since v4.7._
     */
    function toInt176(int256 value) internal pure returns (int176 downcasted) {
        downcasted = int176(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 176 bits");
    }

    /**
     * @dev Returns the downcasted int168 from int256, reverting on
     * overflow (when the input is less than smallest int168 or
     * greater than largest int168).
     *
     * Counterpart to Solidity's `int168` operator.
     *
     * Requirements:
     *
     * - input must fit into 168 bits
     *
     * _Available since v4.7._
     */
    function toInt168(int256 value) internal pure returns (int168 downcasted) {
        downcasted = int168(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 168 bits");
    }

    /**
     * @dev Returns the downcasted int160 from int256, reverting on
     * overflow (when the input is less than smallest int160 or
     * greater than largest int160).
     *
     * Counterpart to Solidity's `int160` operator.
     *
     * Requirements:
     *
     * - input must fit into 160 bits
     *
     * _Available since v4.7._
     */
    function toInt160(int256 value) internal pure returns (int160 downcasted) {
        downcasted = int160(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 160 bits");
    }

    /**
     * @dev Returns the downcasted int152 from int256, reverting on
     * overflow (when the input is less than smallest int152 or
     * greater than largest int152).
     *
     * Counterpart to Solidity's `int152` operator.
     *
     * Requirements:
     *
     * - input must fit into 152 bits
     *
     * _Available since v4.7._
     */
    function toInt152(int256 value) internal pure returns (int152 downcasted) {
        downcasted = int152(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 152 bits");
    }

    /**
     * @dev Returns the downcasted int144 from int256, reverting on
     * overflow (when the input is less than smallest int144 or
     * greater than largest int144).
     *
     * Counterpart to Solidity's `int144` operator.
     *
     * Requirements:
     *
     * - input must fit into 144 bits
     *
     * _Available since v4.7._
     */
    function toInt144(int256 value) internal pure returns (int144 downcasted) {
        downcasted = int144(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 144 bits");
    }

    /**
     * @dev Returns the downcasted int136 from int256, reverting on
     * overflow (when the input is less than smallest int136 or
     * greater than largest int136).
     *
     * Counterpart to Solidity's `int136` operator.
     *
     * Requirements:
     *
     * - input must fit into 136 bits
     *
     * _Available since v4.7._
     */
    function toInt136(int256 value) internal pure returns (int136 downcasted) {
        downcasted = int136(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 136 bits");
    }

    /**
     * @dev Returns the downcasted int128 from int256, reverting on
     * overflow (when the input is less than smallest int128 or
     * greater than largest int128).
     *
     * Counterpart to Solidity's `int128` operator.
     *
     * Requirements:
     *
     * - input must fit into 128 bits
     *
     * _Available since v3.1._
     */
    function toInt128(int256 value) internal pure returns (int128 downcasted) {
        downcasted = int128(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 128 bits");
    }

    /**
     * @dev Returns the downcasted int120 from int256, reverting on
     * overflow (when the input is less than smallest int120 or
     * greater than largest int120).
     *
     * Counterpart to Solidity's `int120` operator.
     *
     * Requirements:
     *
     * - input must fit into 120 bits
     *
     * _Available since v4.7._
     */
    function toInt120(int256 value) internal pure returns (int120 downcasted) {
        downcasted = int120(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 120 bits");
    }

    /**
     * @dev Returns the downcasted int112 from int256, reverting on
     * overflow (when the input is less than smallest int112 or
     * greater than largest int112).
     *
     * Counterpart to Solidity's `int112` operator.
     *
     * Requirements:
     *
     * - input must fit into 112 bits
     *
     * _Available since v4.7._
     */
    function toInt112(int256 value) internal pure returns (int112 downcasted) {
        downcasted = int112(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 112 bits");
    }

    /**
     * @dev Returns the downcasted int104 from int256, reverting on
     * overflow (when the input is less than smallest int104 or
     * greater than largest int104).
     *
     * Counterpart to Solidity's `int104` operator.
     *
     * Requirements:
     *
     * - input must fit into 104 bits
     *
     * _Available since v4.7._
     */
    function toInt104(int256 value) internal pure returns (int104 downcasted) {
        downcasted = int104(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 104 bits");
    }

    /**
     * @dev Returns the downcasted int96 from int256, reverting on
     * overflow (when the input is less than smallest int96 or
     * greater than largest int96).
     *
     * Counterpart to Solidity's `int96` operator.
     *
     * Requirements:
     *
     * - input must fit into 96 bits
     *
     * _Available since v4.7._
     */
    function toInt96(int256 value) internal pure returns (int96 downcasted) {
        downcasted = int96(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 96 bits");
    }

    /**
     * @dev Returns the downcasted int88 from int256, reverting on
     * overflow (when the input is less than smallest int88 or
     * greater than largest int88).
     *
     * Counterpart to Solidity's `int88` operator.
     *
     * Requirements:
     *
     * - input must fit into 88 bits
     *
     * _Available since v4.7._
     */
    function toInt88(int256 value) internal pure returns (int88 downcasted) {
        downcasted = int88(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 88 bits");
    }

    /**
     * @dev Returns the downcasted int80 from int256, reverting on
     * overflow (when the input is less than smallest int80 or
     * greater than largest int80).
     *
     * Counterpart to Solidity's `int80` operator.
     *
     * Requirements:
     *
     * - input must fit into 80 bits
     *
     * _Available since v4.7._
     */
    function toInt80(int256 value) internal pure returns (int80 downcasted) {
        downcasted = int80(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 80 bits");
    }

    /**
     * @dev Returns the downcasted int72 from int256, reverting on
     * overflow (when the input is less than smallest int72 or
     * greater than largest int72).
     *
     * Counterpart to Solidity's `int72` operator.
     *
     * Requirements:
     *
     * - input must fit into 72 bits
     *
     * _Available since v4.7._
     */
    function toInt72(int256 value) internal pure returns (int72 downcasted) {
        downcasted = int72(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 72 bits");
    }

    /**
     * @dev Returns the downcasted int64 from int256, reverting on
     * overflow (when the input is less than smallest int64 or
     * greater than largest int64).
     *
     * Counterpart to Solidity's `int64` operator.
     *
     * Requirements:
     *
     * - input must fit into 64 bits
     *
     * _Available since v3.1._
     */
    function toInt64(int256 value) internal pure returns (int64 downcasted) {
        downcasted = int64(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 64 bits");
    }

    /**
     * @dev Returns the downcasted int56 from int256, reverting on
     * overflow (when the input is less than smallest int56 or
     * greater than largest int56).
     *
     * Counterpart to Solidity's `int56` operator.
     *
     * Requirements:
     *
     * - input must fit into 56 bits
     *
     * _Available since v4.7._
     */
    function toInt56(int256 value) internal pure returns (int56 downcasted) {
        downcasted = int56(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 56 bits");
    }

    /**
     * @dev Returns the downcasted int48 from int256, reverting on
     * overflow (when the input is less than smallest int48 or
     * greater than largest int48).
     *
     * Counterpart to Solidity's `int48` operator.
     *
     * Requirements:
     *
     * - input must fit into 48 bits
     *
     * _Available since v4.7._
     */
    function toInt48(int256 value) internal pure returns (int48 downcasted) {
        downcasted = int48(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 48 bits");
    }

    /**
     * @dev Returns the downcasted int40 from int256, reverting on
     * overflow (when the input is less than smallest int40 or
     * greater than largest int40).
     *
     * Counterpart to Solidity's `int40` operator.
     *
     * Requirements:
     *
     * - input must fit into 40 bits
     *
     * _Available since v4.7._
     */
    function toInt40(int256 value) internal pure returns (int40 downcasted) {
        downcasted = int40(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 40 bits");
    }

    /**
     * @dev Returns the downcasted int32 from int256, reverting on
     * overflow (when the input is less than smallest int32 or
     * greater than largest int32).
     *
     * Counterpart to Solidity's `int32` operator.
     *
     * Requirements:
     *
     * - input must fit into 32 bits
     *
     * _Available since v3.1._
     */
    function toInt32(int256 value) internal pure returns (int32 downcasted) {
        downcasted = int32(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 32 bits");
    }

    /**
     * @dev Returns the downcasted int24 from int256, reverting on
     * overflow (when the input is less than smallest int24 or
     * greater than largest int24).
     *
     * Counterpart to Solidity's `int24` operator.
     *
     * Requirements:
     *
     * - input must fit into 24 bits
     *
     * _Available since v4.7._
     */
    function toInt24(int256 value) internal pure returns (int24 downcasted) {
        downcasted = int24(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 24 bits");
    }

    /**
     * @dev Returns the downcasted int16 from int256, reverting on
     * overflow (when the input is less than smallest int16 or
     * greater than largest int16).
     *
     * Counterpart to Solidity's `int16` operator.
     *
     * Requirements:
     *
     * - input must fit into 16 bits
     *
     * _Available since v3.1._
     */
    function toInt16(int256 value) internal pure returns (int16 downcasted) {
        downcasted = int16(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 16 bits");
    }

    /**
     * @dev Returns the downcasted int8 from int256, reverting on
     * overflow (when the input is less than smallest int8 or
     * greater than largest int8).
     *
     * Counterpart to Solidity's `int8` operator.
     *
     * Requirements:
     *
     * - input must fit into 8 bits
     *
     * _Available since v3.1._
     */
    function toInt8(int256 value) internal pure returns (int8 downcasted) {
        downcasted = int8(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 8 bits");
    }

    /**
     * @dev Converts an unsigned uint256 into a signed int256.
     *
     * Requirements:
     *
     * - input must be less than or equal to maxInt256.
     *
     * _Available since v3.0._
     */
    function toInt256(uint256 value) internal pure returns (int256) {
        // Note: Unsafe cast below is okay because `type(int256).max` is guaranteed to be positive
        require(value <= uint256(type(int256).max), "SafeCast: value doesn't fit in an int256");
        return int256(value);
    }
}

// File: contracts/Structs.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.17;

import { DCSProduct, DCSVault } from "./cega-strategies/dcs/DCSStructs.sol";
import { IOracleEntry } from "./oracle-entry/interfaces/IOracleEntry.sol";

uint32 constant DCS_STRATEGY_ID = 1;

struct DepositQueue {
    uint128 queuedDepositsTotalAmount;
    uint128 processedIndex;
    mapping(address => uint128) amounts;
    address[] depositors;
}

struct Withdrawer {
    address account;
    uint32 nextProductId;
}

struct ProductMetadata {
    string name;
    string tradeWinnerNftImage;
}

struct WithdrawalQueue {
    uint128 queuedWithdrawalSharesAmount;
    uint128 processedIndex;
    mapping(address => mapping(uint32 => uint256)) amounts;
    Withdrawer[] withdrawers;
    mapping(address => bool) withdrawingWithProxy;
}

struct CegaGlobalStorage {
    // Global information
    uint32 strategyIdCounter;
    uint32 productIdCounter;
    uint32[] strategyIds;
    mapping(uint32 => uint32) strategyOfProduct;
    mapping(uint32 => ProductMetadata) productMetadata;
    mapping(address => Vault) vaults;
    // DCS information
    mapping(uint32 => DCSProduct) dcsProducts;
    mapping(uint32 => DepositQueue) dcsDepositQueues;
    mapping(address => DCSVault) dcsVaults;
    mapping(address => WithdrawalQueue) dcsWithdrawalQueues;
    // vaultAddress => (timestamp => price)
    mapping(address => mapping(uint40 => uint128)) oraclePriceOverride;
}

struct Vault {
    uint128 totalAssets;
    uint64 auctionWinnerTokenId;
    uint16 yieldFeeBps;
    uint16 managementFeeBps;
    uint32 productId;
    address auctionWinner;
    uint40 tradeStartDate;
    VaultStatus vaultStatus;
    IOracleEntry.DataSource dataSource;
    bool isInDispute;
}

enum VaultStatus {
    DepositsClosed,
    DepositsOpen,
    NotTraded,
    Traded,
    TradeExpired,
    FeesCollected,
    WithdrawalQueueProcessed,
    Zombie
}

struct MMNFTMetadata {
    address vaultAddress;
    uint40 tradeStartDate;
    uint40 tradeEndDate;
    uint16 aprBps;
    uint128 notional;
    uint128 initialSpotPrice;
    uint128 strikePrice;
}

// File: contracts/cega-strategies/dcs/DCSStructs.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.17;

enum DCSOptionType {
    BuyLow,
    SellHigh
}

enum SettlementStatus {
    NotAuctioned,
    Auctioned,
    InitialPremiumPaid,
    AwaitingSettlement,
    Settled,
    Defaulted
}

struct DCSProductCreationParams {
    uint128 maxUnderlyingAmountLimit;
    uint128 minDepositAmount;
    uint128 minWithdrawalAmount;
    address quoteAssetAddress;
    address baseAssetAddress;
    DCSOptionType dcsOptionType;
    uint8 daysToStartLateFees;
    uint8 daysToStartAuctionDefault;
    uint8 daysToStartSettlementDefault;
    uint16 lateFeeBps;
    uint16 strikeBarrierBps;
    uint40 tenorInSeconds;
    uint8 disputePeriodInHours;
    string name;
    string tradeWinnerNftImage;
}

struct DCSProduct {
    uint128 maxUnderlyingAmountLimit;
    uint128 minDepositAmount;
    uint128 minWithdrawalAmount;
    uint128 sumVaultUnderlyingAmounts; //revisit later
    address quoteAssetAddress; // should be immutable
    uint40 tenorInSeconds;
    uint16 lateFeeBps;
    uint8 daysToStartLateFees;
    address baseAssetAddress; // should be immutable
    uint16 strikeBarrierBps;
    uint8 daysToStartAuctionDefault;
    uint8 daysToStartSettlementDefault;
    uint8 disputePeriodInHours;
    DCSOptionType dcsOptionType;
    bool isDepositQueueOpen;
    address[] vaults;
}

struct DCSVault {
    uint128 initialSpotPrice;
    uint128 strikePrice;
    uint128 totalYield;
    uint16 aprBps;
    SettlementStatus settlementStatus;
    bool isPayoffInDepositAsset;
}

// File: contracts/cega-strategies/dcs/interfaces/IDCSBulkActionsEntry.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.17;

import { Withdrawer, VaultStatus } from "../../../Structs.sol";
import {
    DCSProductCreationParams,
    DCSProduct,
    SettlementStatus
} from "../DCSStructs.sol";
import {
    IOracleEntry
} from "../../../oracle-entry/interfaces/IOracleEntry.sol";

interface IDCSBulkActionsEntry {
    // FUNCTIONS

    function dcsBulkStartTrades(
        address[] calldata vaultAddresses
    ) external payable;

    function dcsBulkOpenVaultDeposits(
        address[] calldata vaultAddresses
    ) external;

    function dcsBulkProcessDepositQueues(
        address[] calldata vaultAddresses,
        uint256 maxProcessCount
    ) external;

    function dcsBulkProcessWithdrawalQueues(
        address[] calldata vaultAddresses,
        uint256 maxProcessCount
    ) external;

    function dcsBulkRolloverVaults(address[] calldata vaultAddresses) external;

    function dcsBulkCheckTradesExpiry(
        address[] calldata vaultAddresses
    ) external;

    function dcsBulkCheckAuctionDefault(
        address[] calldata vaultAddresses
    ) external;

    function dcsBulkCheckSettlementDefault(
        address[] calldata vaultAddresses
    ) external;

    function dcsBulkSettleVaults(
        address[] calldata vaultAddresses
    ) external payable;

    function dcsBulkCollectFees(address[] calldata vaultAddresses) external;
}

// File: contracts/cega-strategies/dcs/interfaces/IDCSConfigurationEntry.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.17;

interface IDCSConfigurationEntry {
    // FUNCTIONS

    function dcsSetLateFeeBps(uint16 lateFeeBps, uint32 productId) external;

    function dcsSetMinDepositAmount(
        uint128 minDepositAmount,
        uint32 productId
    ) external;

    function dcsSetMinWithdrawalAmount(
        uint128 minWithdrawalAmount,
        uint32 productId
    ) external;

    function dcsSetIsDepositQueueOpen(
        bool isDepositQueueOpen,
        uint32 productId
    ) external;

    function dcsSetDaysToStartLateFees(
        uint32 productId,
        uint8 daysToStartLateFees
    ) external;

    function dcsSetDaysToStartAuctionDefault(
        uint32 productId,
        uint8 daysToStartAuctionDefault
    ) external;

    function dcsSetDaysToStartSettlementDefault(
        uint32 productId,
        uint8 daysToStartSettlementDefault
    ) external;

    function dcsSetMaxUnderlyingAmount(
        uint128 maxUnderlyingAmountLimit,
        uint32 productId
    ) external;

    function dcsSetManagementFee(address vaultAddress, uint16 value) external;

    function dcsSetYieldFee(address vaultAddress, uint16 value) external;

    function dcsSetDisputePeriodInHours(
        uint32 productId,
        uint8 disputePeriodInHours
    ) external;

    function setProductName(uint32 productId, string memory name) external;

    function setTradeWinnerNftImage(
        uint32 productId,
        string memory imageUrl
    ) external;
}

// File: contracts/cega-strategies/dcs/interfaces/IDCSEntry.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.17;

import { VaultStatus } from "../../../Structs.sol";
import { SettlementStatus } from "../DCSStructs.sol";
import { IDCSProductEntry } from "./IDCSProductEntry.sol";
import { IDCSVaultEntry } from "./IDCSVaultEntry.sol";
import { IDCSConfigurationEntry } from "./IDCSConfigurationEntry.sol";
import { IDCSBulkActionsEntry } from "./IDCSBulkActionsEntry.sol";
import {
    IProductViewEntry
} from "../../../common/interfaces/IProductViewEntry.sol";
import {
    IVaultViewEntry
} from "../../../common/interfaces/IVaultViewEntry.sol";

interface IDCSEntry is
    IDCSProductEntry,
    IDCSVaultEntry,
    IDCSConfigurationEntry,
    IDCSBulkActionsEntry,
    IProductViewEntry,
    IVaultViewEntry
{
    // EVENTS

    event DCSProductCreated(uint32 indexed productId);

    event DepositQueued(
        uint32 indexed productId,
        address sender,
        address receiver,
        uint128 amount
    );

    event DepositProcessed(
        address indexed vaultAddress,
        address receiver,
        uint128 amount
    );

    event WithdrawalQueued(
        address indexed vaultAddress,
        uint256 sharesAmount,
        address owner,
        uint32 nextProductId,
        bool withProxy
    );

    event WithdrawalProcessed(
        address indexed vaultAddress,
        uint256 sharesAmount,
        address owner,
        uint32 nextProductId
    );

    event VaultStatusUpdated(
        address indexed vaultAddress,
        VaultStatus vaultStatus
    );

    event DCSSettlementStatusUpdated(
        address indexed vaultAddress,
        SettlementStatus settlementStatus
    );

    event DCSVaultFeesCollected(
        address indexed vaultAddress,
        uint128 totalFees,
        uint128 managementFee,
        uint128 yieldFee
    );

    event VaultCreated(
        uint32 indexed productId,
        address indexed vaultAddress,
        string _tokenSymbol,
        string _tokenName
    );

    event DCSAuctionEnded(
        address indexed vaultAddress,
        address indexed auctionWinner,
        uint40 tradeStartDate,
        uint16 aprBps,
        uint128 initialSpotPrice,
        uint128 strikePrice
    );

    event DCSTradeStarted(
        address indexed vaultAddress,
        address auctionWinner,
        uint128 notionalAmount,
        uint128 yieldAmount
    );

    event DCSVaultSettled(
        address indexed vaultAddress,
        address settler,
        uint128 depositedAmount,
        uint128 withdrawnAmount
    );

    event DCSVaultRolledOver(address indexed vaultAddress);

    event DCSIsPayoffInDepositAssetUpdated(
        address indexed vaultAddress,
        bool isPayoffInDepositAsset
    );

    event DCSLateFeeBpsUpdated(uint32 indexed productId, uint16 lateFeeBps);

    event DCSMinDepositAmountUpdated(
        uint32 indexed productId,
        uint128 minDepositAmount
    );

    event DCSMinWithdrawalAmountUpdated(
        uint32 indexed productId,
        uint128 minWithdrawalAmount
    );

    event DCSIsDepositQueueOpenUpdated(
        uint32 indexed productId,
        bool isDepositQueueOpen
    );

    event DCSMaxUnderlyingAmountLimitUpdated(
        uint32 indexed productId,
        uint128 maxUnderlyingAmountLimit
    );

    event DCSManagementFeeUpdated(address indexed vaultAddress, uint16 value);

    event DCSYieldFeeUpdated(address indexed vaultAddress, uint16 value);

    event DisputeSubmitted(address indexed vaultAddress);

    event DCSDisputePeriodInHoursUpdated(
        uint32 indexed productId,
        uint8 disputePeriodInHours
    );

    event DCSDaysToStartLateFeesUpdated(
        uint32 indexed productId,
        uint8 daysToStartLateFees
    );

    event DCSDaysToStartAuctionDefaultUpdated(
        uint32 indexed productId,
        uint8 daysToStartAuctionDefault
    );

    event DCSDaysToStartSettlementDefaultUpdated(
        uint32 indexed productId,
        uint8 daysToStartSettlementDefault
    );

    event ProductNameUpdated(uint32 indexed productId, string name);
    event TradeWinnerNftImageUpdated(uint32 indexed productId, string imageUrl);
}

// File: contracts/cega-strategies/dcs/interfaces/IDCSProductEntry.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.17;

import { Withdrawer, VaultStatus } from "../../../Structs.sol";
import {
    DCSProductCreationParams,
    DCSProduct,
    SettlementStatus
} from "../DCSStructs.sol";
import {
    IOracleEntry
} from "../../../oracle-entry/interfaces/IOracleEntry.sol";

interface IDCSProductEntry {
    // FUNCTIONS

    function dcsGetProduct(
        uint32 productId
    ) external view returns (DCSProduct memory);

    function dcsGetProductDepositAsset(
        uint32 productId
    ) external view returns (address);

    function dcsGetDepositQueue(
        uint32 productId
    )
        external
        view
        returns (
            address[] memory depositors,
            uint128[] memory amounts,
            uint128 totalAmount
        );

    function dcsGetWithdrawalQueue(
        address vaultAddress
    )
        external
        view
        returns (
            Withdrawer[] memory withdrawers,
            uint256[] memory amounts,
            bool[] memory withProxy,
            uint256 totalAmount
        );

    function dcsIsWithdrawalPossible(
        address vaultAddress
    ) external view returns (bool);

    function dcsCalculateVaultFinalPayoff(
        address vaultAddress
    ) external view returns (uint128);

    function dcsCreateProduct(
        DCSProductCreationParams calldata creationParams
    ) external returns (uint32);

    function dcsAddToDepositQueue(
        uint32 productId,
        uint128 amount,
        address receiver
    ) external payable;

    function dcsProcessDepositQueue(
        address vault,
        uint256 maxProcessCount
    ) external;

    function dcsAddToWithdrawalQueue(
        address vault,
        uint128 sharesAmount,
        uint32 nextProductId
    ) external;

    function dcsAddToWithdrawalQueueWithProxy(
        address vaultAddress,
        uint128 sharesAmount
    ) external;

    function dcsProcessWithdrawalQueue(
        address vault,
        uint256 maxProcessCount
    ) external;

    function dcsCheckTradeExpiry(address vaultAddress) external;

    function dcsCheckSettlementDefault(address vaultAddress) external;

    function dcsCollectVaultFees(address vaultAddress) external;

    function dcsSubmitDispute(address vaultAddress) external;

    function dcsProcessTradeDispute(
        address vaultAddress,
        uint128 newPrice
    ) external;
}

// File: contracts/cega-strategies/dcs/interfaces/IDCSVaultEntry.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.17;

import { VaultStatus, Vault } from "../../../Structs.sol";
import { SettlementStatus, DCSVault } from "../DCSStructs.sol";
import {
    IOracleEntry
} from "../../../oracle-entry/interfaces/IOracleEntry.sol";

interface IDCSVaultEntry {
    // FUNCTIONS

    function dcsGetVault(
        address vaultAddress
    ) external view returns (DCSVault memory);

    function dcsCalculateLateFee(
        address vaultAddress
    ) external view returns (uint128);

    function dcsGetCouponPayment(
        address vaultAddress
    ) external view returns (uint128);

    function openVaultDeposits(address vaultAddress) external;

    function setVaultStatus(
        address vaultAddress,
        VaultStatus _vaultStatus
    ) external;

    function dcsCreateVault(
        uint32 productId,
        string memory _tokenName,
        string memory _tokenSymbol
    ) external returns (address vaultAddress);

    function dcsEndAuction(
        address vaultAddress,
        address _auctionWinner,
        uint40 _tradeStartDate,
        uint16 _aprBps,
        IOracleEntry.DataSource dataSource
    ) external;

    function dcsStartTrade(address vaultAddress) external payable;

    function dcsSettleVault(address vaultAddress) external payable;

    function dcsRolloverVault(address vaultAddress) external;

    function dcsSetSettlementStatus(
        address vaultAddress,
        SettlementStatus _settlementStatus
    ) external;

    function dcsSetIsPayoffInDepositAsset(
        address vaultAddress,
        bool newState
    ) external;

    function dcsCheckAuctionDefault(address vaultAddress) external;

    function overrideOraclePrice(
        address vaultAddress,
        uint40 timestamp,
        uint128 newPrice
    ) external;
}

// File: contracts/common/interfaces/IProductViewEntry.sol



// SPDX-License-Identifier: MIT

import { ProductMetadata } from "../../Structs.sol";

pragma solidity ^0.8.17;

interface IProductViewEntry {
    function getStrategyOfProduct(
        uint32 productId
    ) external view returns (uint32);

    function getLatestProductId() external view returns (uint32);

    function getProductMetadata(
        uint32 productId
    ) external view returns (ProductMetadata memory);
}

// File: contracts/common/interfaces/IVaultViewEntry.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.17;

import { Vault } from "../../Structs.sol";

interface IVaultViewEntry {
    function getOraclePriceOverride(
        address vaultAddress,
        uint40 timestamp
    ) external view returns (uint128);

    function getVault(
        address vaultAddress
    ) external view returns (Vault memory);

    function getVaultProductId(address vault) external view returns (uint32);

    function getIsDefaulted(address vaultAddress) external view returns (bool);

    function getDaysLate(address vaultAddress) external view returns (uint256);

    function totalAssets(address vaultAddress) external view returns (uint256);

    function convertToAssets(
        address vaultAddress,
        uint256 shares
    ) external view returns (uint128);

    function convertToShares(
        address vaultAddress,
        uint128 assets
    ) external view returns (uint256);
}

// File: contracts/oracle-entry/interfaces/IOracleEntry.sol



// SPDX-License-Identifier: MIT

pragma solidity 0.8.17;

interface IOracleEntry {
    enum DataSource {
        None,
        Pyth
    }

    event DataSourceAdapterSet(DataSource dataSource, address adapter);

    /// @notice Gets `asset` price at `timestamp` in terms of USD using `dataSource`
    function getSinglePrice(
        address asset,
        uint40 timestamp,
        DataSource dataSource
    ) external view returns (uint128);

    /// @notice Gets `baseAsset` price at `timestamp` in terms of `quoteAsset` using `dataSource`
    function getPrice(
        address baseAsset,
        address quoteAsset,
        uint40 timestamp,
        DataSource dataSource
    ) external view returns (uint128);

    /// @notice Sets data source adapter
    function setDataSourceAdapter(
        DataSource dataSource,
        address adapter
    ) external;

    function getTargetDecimals() external pure returns (uint8);
}

// File: contracts/proxies/StETHWrappingProxy.sol



// SPDX-License-Identifier: MIT

pragma solidity 0.8.17;

import { IERC20 } from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import { SafeCast } from "@openzeppelin/contracts/utils/math/SafeCast.sol";

import { IDCSEntry } from "../cega-strategies/dcs/interfaces/IDCSEntry.sol";
import { IWrappingProxy } from "./interfaces/IWrappingProxy.sol";
import { IWstETH } from "./interfaces/IWstETH.sol";

contract StETHWrappingProxy is IWrappingProxy {
    using SafeCast for uint256;

    IDCSEntry public immutable cegaEntry;

    IERC20 public immutable stETH;

    IWstETH public immutable wstETH;

    constructor(IDCSEntry _cegaEntry, IERC20 _stETH, IWstETH _wstETH) {
        cegaEntry = _cegaEntry;
        stETH = _stETH;
        wstETH = _wstETH;

        // stETH and wstETH support infinite approval, so it's enough to approve once
        _stETH.approve(address(_wstETH), type(uint256).max);
        _wstETH.approve(address(_cegaEntry), type(uint256).max);
    }

    function unwrapAndTransfer(address receiver, uint256 amount) external {
        uint256 stETHAmount = wstETH.unwrap(amount);
        stETH.transfer(receiver, stETHAmount);
    }

    function wrapAndAddToDCSDepositQueue(
        uint32 productId,
        uint128 amount,
        address receiver
    ) external {
        stETH.transferFrom(msg.sender, address(this), amount);
        uint128 wstETHAmount = wstETH.wrap(amount).toUint128();
        cegaEntry.dcsAddToDepositQueue(productId, wstETHAmount, receiver);
    }
}

// File: contracts/proxies/interfaces/IWrappingProxy.sol



// SPDX-License-Identifier: MIT

pragma solidity 0.8.17;

interface IWrappingProxy {
    function unwrapAndTransfer(address receiver, uint256 amount) external;

    function wrapAndAddToDCSDepositQueue(
        uint32 productId,
        uint128 amount,
        address receiver
    ) external;
}

// File: contracts/proxies/interfaces/IWstETH.sol



// SPDX-License-Identifier: MIT

pragma solidity 0.8.17;

import { IERC20 } from "@openzeppelin/contracts/token/ERC20/IERC20.sol";

interface IWstETH is IERC20 {
    function wrap(uint256 _stETHAmount) external returns (uint256);

    function unwrap(uint256 _wstETHAmount) external returns (uint256);
}