SwapProbe

{{
  "language": "Solidity",
  "sources": {
    "4.executor/contracts/SwapProbe.sol": {
      "content": "// SPDX-License-Identifier: MIT
pragma solidity ^0.8.30;

import {ReentrancyGuard} from "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import {SafeERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";

interface IUniswapV2Router02 {
  function swapExactTokensForTokens(
    uint256 amountIn,
    uint256 amountOutMin,
    address[] calldata path,
    address to,
    uint256 deadline
  ) external returns (uint256[] memory amounts);
}

interface ISwapRouter {
  struct ExactInputSingleParams {
    address tokenIn;
    address tokenOut;
    uint24 fee;
    address recipient;
    uint256 deadline;
    uint256 amountIn;
    uint256 amountOutMinimum;
    uint160 sqrtPriceLimitX96;
  }

  function exactInputSingle(ExactInputSingleParams calldata params) external payable returns (uint256 amountOut);
}

interface IUniswapV2Pair {
  function token0() external view returns (address);

  function token1() external view returns (address);

  function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);

  function price0CumulativeLast() external view returns (uint256);

  function price1CumulativeLast() external view returns (uint256);

  function kLast() external view returns (uint256);
}

interface IUniswapV3Pool {
  function token0() external view returns (address);

  function token1() external view returns (address);

  function slot0()
    external
    view
    returns (
      uint160 sqrtPriceX96,
      int24 tick,
      uint16 observationIndex,
      uint16 observationCardinality,
      uint16 observationCardinalityNext,
      uint8 feeProtocol,
      bool unlocked
    );

  function liquidity() external view returns (uint128);

  function feeGrowthGlobal0X128() external view returns (uint256);

  function feeGrowthGlobal1X128() external view returns (uint256);

  function tickSpacing() external view returns (int24);
}

contract SwapProbe is ReentrancyGuard {
  using SafeERC20 for IERC20;

  enum DexType {
    V2,
    V3
  }

  uint8 internal constant SNAPSHOT_PHASE_BEFORE = 0;
  uint8 internal constant SNAPSHOT_PHASE_AFTER = 1;

  struct SwapLeg {
    DexType dex;
    address router;
    address pool;
    address tokenIn;
    address tokenOut;
    uint24 feeTier;
    uint256 minAmountOut;
  }

  struct ExecutionSummary {
    bytes32 routeId;
    address caller;
    address tokenIn;
    address tokenOut;
    uint256 amountIn;
    uint256 amountOut;
  }

  struct PoolSnapshot {
    address pool;
    address token0;
    address token1;
    uint256 reserve0;
    uint256 reserve1;
    uint128 liquidity;
    int24 tick;
    uint160 sqrtPriceX96;
    uint16 observationIndex;
    uint16 observationCardinality;
    uint16 observationCardinalityNext;
    uint8 feeProtocol;
    bool unlocked;
    int24 tickSpacing;
    uint256 feeGrowthGlobal0X128;
    uint256 feeGrowthGlobal1X128;
    uint256 price0CumulativeLast;
    uint256 price1CumulativeLast;
    uint256 kLast;
    uint256 blockTimestampLast;
  }

  struct LegExecution {
    SwapLeg leg;
    uint256 amountIn;
    uint256 amountOut;
    PoolSnapshot beforeSnapshot;
    PoolSnapshot afterSnapshot;
  }

  error InvalidRoute();
  error UnsupportedDex(uint8 dex);
  error TokenMismatch(address expected, address actual);
  error AmountTooLow();
  error FinalAmountTooLow(uint256 received, uint256 required);

  event LegExecuted(
    bytes32 indexed routeId,
    uint256 indexed legIndex,
    DexType dex,
    address tokenIn,
    address tokenOut,
    uint256 amountIn,
    uint256 amountOut
  );

  event RouteSettled(
    bytes32 indexed routeId,
    address indexed caller,
    address tokenIn,
    address tokenOut,
    uint256 amountIn,
    uint256 amountOut
  );

  event LegObservation(
    bytes32 indexed routeId,
    uint256 indexed legIndex,
    uint8 phase,
    DexType dex,
    PoolSnapshot snapshot,
    uint256 amountIn,
    uint256 amountOut
  );

  function executeSimple(
    bytes32 routeId,
    SwapLeg calldata leg0,
    SwapLeg calldata leg1,
    uint256 amountIn,
    uint256 minFinalAmountOut,
    address recipient
  ) external nonReentrant returns (ExecutionSummary memory summary, LegExecution[] memory legs) {
    SwapLeg[] memory route = new SwapLeg[](2);
    route[0] = leg0;
    route[1] = leg1;
    return _executeRoute(routeId, route, amountIn, minFinalAmountOut, recipient);
  }

  function executeTriangular(
    bytes32 routeId,
    SwapLeg calldata leg0,
    SwapLeg calldata leg1,
    SwapLeg calldata leg2,
    uint256 amountIn,
    uint256 minFinalAmountOut,
    address recipient
  ) external nonReentrant returns (ExecutionSummary memory summary, LegExecution[] memory legs) {
    SwapLeg[] memory route = new SwapLeg[](3);
    route[0] = leg0;
    route[1] = leg1;
    route[2] = leg2;
    return _executeRoute(routeId, route, amountIn, minFinalAmountOut, recipient);
  }

  function executeCustom(
    bytes32 routeId,
    SwapLeg[] calldata legs,
    uint256 amountIn,
    uint256 minFinalAmountOut,
    address recipient
  ) external nonReentrant returns (ExecutionSummary memory summary, LegExecution[] memory executedLegs) {
    if (legs.length == 0) revert InvalidRoute();
    SwapLeg[] memory localLegs = new SwapLeg[](legs.length);
    for (uint256 i = 0; i < legs.length; i++) {
      localLegs[i] = legs[i];
    }
    return _executeRoute(routeId, localLegs, amountIn, minFinalAmountOut, recipient);
  }

  function _executeRoute(
    bytes32 routeId,
    SwapLeg[] memory legs,
    uint256 amountIn,
    uint256 minFinalAmountOut,
    address recipient
  ) internal returns (ExecutionSummary memory summary, LegExecution[] memory legExecutions) {
    if (legs.length == 0) revert InvalidRoute();
    if (amountIn == 0) revert AmountTooLow();
    if (recipient == address(0)) {
      recipient = msg.sender;
    }

    address currentToken = legs[0].tokenIn;
    IERC20(currentToken).safeTransferFrom(msg.sender, address(this), amountIn);
    uint256 currentAmount = amountIn;

    legExecutions = new LegExecution[](legs.length);

    for (uint256 i = 0; i < legs.length; i++) {
      SwapLeg memory leg = legs[i];
      if (leg.tokenIn != currentToken) revert TokenMismatch(currentToken, leg.tokenIn);
      if (leg.router == address(0)) revert InvalidRoute();
      if (currentAmount == 0) revert AmountTooLow();

      uint256 amountBefore = currentAmount;
      PoolSnapshot memory beforeSnapshot = _snapshotPool(leg);
      _emitLegObservation(routeId, i, SNAPSHOT_PHASE_BEFORE, leg.dex, beforeSnapshot, amountBefore, 0);

      if (leg.dex == DexType.V2) {
        currentAmount = _executeV2Swap(leg, currentAmount);
      } else if (leg.dex == DexType.V3) {
        currentAmount = _executeV3Swap(leg, currentAmount);
      } else {
        revert UnsupportedDex(uint8(leg.dex));
      }

      PoolSnapshot memory afterSnapshot = _snapshotPool(leg);
      _emitLegObservation(routeId, i, SNAPSHOT_PHASE_AFTER, leg.dex, afterSnapshot, amountBefore, currentAmount);

      legExecutions[i] = LegExecution({
        leg: leg,
        amountIn: amountBefore,
        amountOut: currentAmount,
        beforeSnapshot: beforeSnapshot,
        afterSnapshot: afterSnapshot
      });

      emit LegExecuted(routeId, i, leg.dex, leg.tokenIn, leg.tokenOut, amountBefore, currentAmount);

      currentToken = leg.tokenOut;
    }

    if (currentAmount < minFinalAmountOut) {
      revert FinalAmountTooLow(currentAmount, minFinalAmountOut);
    }

    IERC20(currentToken).safeTransfer(recipient, currentAmount);

    emit RouteSettled(routeId, msg.sender, legs[0].tokenIn, currentToken, amountIn, currentAmount);

    summary = ExecutionSummary({
      routeId: routeId,
      caller: msg.sender,
      tokenIn: legs[0].tokenIn,
      tokenOut: currentToken,
      amountIn: amountIn,
      amountOut: currentAmount
    });
  }

  function _emitLegObservation(
    bytes32 routeId,
    uint256 legIndex,
    uint8 phase,
    DexType dex,
    PoolSnapshot memory snapshot,
    uint256 amountIn,
    uint256 amountOut
  ) internal {
    emit LegObservation(routeId, legIndex, phase, dex, snapshot, amountIn, amountOut);
  }

  function _executeV2Swap(SwapLeg memory leg, uint256 amountIn) internal returns (uint256 amountOut) {
    IERC20(leg.tokenIn).safeApprove(leg.router, 0);
    IERC20(leg.tokenIn).safeApprove(leg.router, amountIn);

    address[] memory path = new address[](2);
    path[0] = leg.tokenIn;
    path[1] = leg.tokenOut;

    uint256[] memory amounts = IUniswapV2Router02(leg.router).swapExactTokensForTokens(
      amountIn,
      leg.minAmountOut,
      path,
      address(this),
      block.timestamp
    );
    amountOut = amounts[amounts.length - 1];
  }

  function _executeV3Swap(SwapLeg memory leg, uint256 amountIn) internal returns (uint256 amountOut) {
    IERC20(leg.tokenIn).safeApprove(leg.router, 0);
    IERC20(leg.tokenIn).safeApprove(leg.router, amountIn);

    ISwapRouter.ExactInputSingleParams memory params = ISwapRouter.ExactInputSingleParams({
      tokenIn: leg.tokenIn,
      tokenOut: leg.tokenOut,
      fee: leg.feeTier,
      recipient: address(this),
      deadline: block.timestamp,
      amountIn: amountIn,
      amountOutMinimum: leg.minAmountOut,
      sqrtPriceLimitX96: 0
    });

    amountOut = ISwapRouter(leg.router).exactInputSingle(params);
  }

  function _snapshotPool(SwapLeg memory leg) internal view returns (PoolSnapshot memory snapshot) {
    snapshot.pool = leg.pool;
    if (leg.pool == address(0)) {
      return snapshot;
    }

    if (leg.dex == DexType.V2) {
      IUniswapV2Pair pair = IUniswapV2Pair(leg.pool);
      try pair.token0() returns (address token0) {
        snapshot.token0 = token0;
      } catch {}
      try pair.token1() returns (address token1) {
        snapshot.token1 = token1;
      } catch {}
      try pair.getReserves() returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast) {
        snapshot.reserve0 = reserve0;
        snapshot.reserve1 = reserve1;
        snapshot.blockTimestampLast = blockTimestampLast;
      } catch {}
      try pair.price0CumulativeLast() returns (uint256 price0CumulativeLast) {
        snapshot.price0CumulativeLast = price0CumulativeLast;
      } catch {}
      try pair.price1CumulativeLast() returns (uint256 price1CumulativeLast) {
        snapshot.price1CumulativeLast = price1CumulativeLast;
      } catch {}
      try pair.kLast() returns (uint256 kLast) {
        snapshot.kLast = kLast;
      } catch {}
    } else if (leg.dex == DexType.V3) {
      IUniswapV3Pool pool = IUniswapV3Pool(leg.pool);
      try pool.token0() returns (address token0) {
        snapshot.token0 = token0;
      } catch {}
      try pool.token1() returns (address token1) {
        snapshot.token1 = token1;
      } catch {}
      try pool.slot0()
        returns (
          uint160 sqrtPriceX96,
          int24 tick,
          uint16 observationIndex,
          uint16 observationCardinality,
          uint16 observationCardinalityNext,
          uint8 feeProtocol,
          bool unlocked
        )
      {
        snapshot.sqrtPriceX96 = sqrtPriceX96;
        snapshot.tick = tick;
        snapshot.observationIndex = observationIndex;
        snapshot.observationCardinality = observationCardinality;
        snapshot.observationCardinalityNext = observationCardinalityNext;
        snapshot.feeProtocol = feeProtocol;
        snapshot.unlocked = unlocked;
      } catch {}
      try pool.liquidity() returns (uint128 liquidity_) {
        snapshot.liquidity = liquidity_;
      } catch {}
      try pool.tickSpacing() returns (int24 tickSpacing_) {
        snapshot.tickSpacing = tickSpacing_;
      } catch {}
      try pool.feeGrowthGlobal0X128() returns (uint256 feeGrowth0) {
        snapshot.feeGrowthGlobal0X128 = feeGrowth0;
      } catch {}
      try pool.feeGrowthGlobal1X128() returns (uint256 feeGrowth1) {
        snapshot.feeGrowthGlobal1X128 = feeGrowth1;
      } catch {}

      if (snapshot.token0 != address(0)) {
        try IERC20(snapshot.token0).balanceOf(leg.pool) returns (uint256 reserve0) {
          snapshot.reserve0 = reserve0;
        } catch {}
      }
      if (snapshot.token1 != address(0)) {
        try IERC20(snapshot.token1).balanceOf(leg.pool) returns (uint256 reserve1) {
          snapshot.reserve1 = reserve1;
        } catch {}
      }
    }
    return snapshot;
  }
}
"
    },
    "dependencies/@openzeppelin-contracts-4.9.6/security/ReentrancyGuard.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (security/ReentrancyGuard.sol)

pragma solidity ^0.8.0;

/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 *
 * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
 * available, which can be applied to functions to make sure there are no nested
 * (reentrant) calls to them.
 *
 * Note that because there is a single `nonReentrant` guard, functions marked as
 * `nonReentrant` may not call one another. This can be worked around by making
 * those functions `private`, and then adding `external` `nonReentrant` entry
 * points to them.
 *
 * TIP: If you would like to learn more about reentrancy and alternative ways
 * to protect against it, check out our blog post
 * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
 */
abstract contract ReentrancyGuard {
    // Booleans are more expensive than uint256 or any type that takes up a full
    // word because each write operation emits an extra SLOAD to first read the
    // slot's contents, replace the bits taken up by the boolean, and then write
    // back. This is the compiler's defense against contract upgrades and
    // pointer aliasing, and it cannot be disabled.

    // The values being non-zero value makes deployment a bit more expensive,
    // but in exchange the refund on every call to nonReentrant will be lower in
    // amount. Since refunds are capped to a percentage of the total
    // transaction's gas, it is best to keep them low in cases like this one, to
    // increase the likelihood of the full refund coming into effect.
    uint256 private constant _NOT_ENTERED = 1;
    uint256 private constant _ENTERED = 2;

    uint256 private _status;

    constructor() {
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and making it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        _nonReentrantBefore();
        _;
        _nonReentrantAfter();
    }

    function _nonReentrantBefore() private {
        // On the first call to nonReentrant, _status will be _NOT_ENTERED
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

        // Any calls to nonReentrant after this point will fail
        _status = _ENTERED;
    }

    function _nonReentrantAfter() private {
        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a
     * `nonReentrant` function in the call stack.
     */
    function _reentrancyGuardEntered() internal view returns (bool) {
        return _status == _ENTERED;
    }
}
"
    },
    "dependencies/@openzeppelin-contracts-4.9.6/token/ERC20/utils/SafeERC20.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.3) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";
import "../extensions/IERC20Permit.sol";
import "../../../utils/Address.sol";

/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20 {
    using Address for address;

    /**
     * @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeTransfer(IERC20 token, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    /**
     * @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the
     * calling contract. If `token` returns no value, non-reverting calls are assumed to be successful.
     */
    function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

    /**
     * @dev Deprecated. This function has issues similar to the ones found in
     * {IERC20-approve}, and its usage is discouraged.
     *
     * Whenever possible, use {safeIncreaseAllowance} and
     * {safeDecreaseAllowance} instead.
     */
    function safeApprove(IERC20 token, address spender, uint256 value) internal {
        // safeApprove should only be called when setting an initial allowance,
        // or when resetting it to zero. To increase and decrease it, use
        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
        require(
            (value == 0) || (token.allowance(address(this), spender) == 0),
            "SafeERC20: approve from non-zero to non-zero allowance"
        );
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
    }

    /**
     * @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 oldAllowance = token.allowance(address(this), spender);
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance + value));
    }

    /**
     * @dev Decrease the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        unchecked {
            uint256 oldAllowance = token.allowance(address(this), spender);
            require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance - value));
        }
    }

    /**
     * @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful. Meant to be used with tokens that require the approval
     * to be set to zero before setting it to a non-zero value, such as USDT.
     */
    function forceApprove(IERC20 token, address spender, uint256 value) internal {
        bytes memory approvalCall = abi.encodeWithSelector(token.approve.selector, spender, value);

        if (!_callOptionalReturnBool(token, approvalCall)) {
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, 0));
            _callOptionalReturn(token, approvalCall);
        }
    }

    /**
     * @dev Use a ERC-2612 signature to set the `owner` approval toward `spender` on `token`.
     * Revert on invalid signature.
     */
    function safePermit(
        IERC20Permit token,
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal {
        uint256 nonceBefore = token.nonces(owner);
        token.permit(owner, spender, value, deadline, v, r, s);
        uint256 nonceAfter = token.nonces(owner);
        require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed");
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     */
    function _callOptionalReturn(IERC20 token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We use {Address-functionCall} to perform this call, which verifies that
        // the target address contains contract code and also asserts for success in the low-level call.

        bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
        require(returndata.length == 0 || abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     *
     * This is a variant of {_callOptionalReturn} that silents catches all reverts and returns a bool instead.
     */
    function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We cannot use {Address-functionCall} here since this should return false
        // and not revert is the subcall reverts.

        (bool success, bytes memory returndata) = address(token).call(data);
        return
            success && (returndata.length == 0 || abi.decode(returndata, (bool))) && Address.isContract(address(token));
    }
}
"
    },
    "dependencies/@openzeppelin-contracts-4.9.6/token/ERC20/IERC20.sol": {
      "content": "// 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);
}
"
    },
    "dependencies/@openzeppelin-contracts-4.9.6/token/ERC20/extensions/IERC20Permit.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.4) (token/ERC20/extensions/IERC20Permit.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
 * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
 *
 * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
 * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
 * need to send a transaction, and thus is not required to hold Ether at all.
 *
 * ==== Security Considerations
 *
 * There are two important considerations concerning the use of `permit`. The first is that a valid permit signature
 * expresses an allowance, and it should not be assumed to convey additional meaning. In particular, it should not be
 * considered as an intention to spend the allowance in any specific way. The second is that because permits have
 * built-in replay protection and can be submitted by anyone, they can be frontrun. A protocol that uses permits should
 * take this into consideration and allow a `permit` call to fail. Combining these two aspects, a pattern that may be
 * generally recommended is:
 *
 * ```solidity
 * function doThingWithPermit(..., uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) public {
 *     try token.permit(msg.sender, address(this), value, deadline, v, r, s) {} catch {}
 *     doThing(..., value);
 * }
 *
 * function doThing(..., uint256 value) public {
 *     token.safeTransferFrom(msg.sender, address(this), value);
 *     ...
 * }
 * ```
 *
 * Observe that: 1) `msg.sender` is used as the owner, leaving no ambiguity as to the signer intent, and 2) the use of
 * `try/catch` allows the permit to fail and makes the code tolerant to frontrunning. (See also
 * {SafeERC20-safeTransferFrom}).
 *
 * Additionally, note that smart contract wallets (such as Argent or Safe) are not able to produce permit signatures, so
 * contracts should have entry points that don't rely on permit.
 */
interface IERC20Permit {
    /**
     * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
     * given ``owner``'s signed approval.
     *
     * IMPORTANT: The same issues {IERC20-approve} has related to transaction
     * ordering also apply here.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `deadline` must be a timestamp in the future.
     * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
     * over the EIP712-formatted function arguments.
     * - the signature must use ``owner``'s current nonce (see {nonces}).
     *
     * For more information on the signature format, see the
     * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
     * section].
     *
     * CAUTION: See Security Considerations above.
     */
    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

    /**
     * @dev Returns the current nonce for `owner`. This value must be
     * included whenever a signature is generated for {permit}.
     *
     * Every successful call to {permit} increases ``owner``'s nonce by one. This
     * prevents a signature from being used multiple times.
     */
    function nonces(address owner) external view returns (uint256);

    /**
     * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.
     */
    // solhint-disable-next-line func-name-mixedcase
    function DOMAIN_SEPARATOR() external view returns (bytes32);
}
"
    },
    "dependencies/@openzeppelin-contracts-4.9.6/utils/Address.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol)

pragma solidity ^0.8.1;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     *
     * Furthermore, `isContract` will also return true if the target contract within
     * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,
     * which only has an effect at the end of a transaction.
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
     * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
     *
     * _Available since v4.8._
     */
    function verifyCallResultFromTarget(
        address target,
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        if (success) {
            if (returndata.length == 0) {
                // only check isContract if the call was successful and the return data is empty
                // otherwise we already know that it was a contract
                require(isContract(target), "Address: call to non-contract");
            }
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    /**
     * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason or using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    function _revert(bytes memory returndata, string memory errorMessage) private pure {
        // Look for revert reason and bubble it up if present
        if (returndata.length > 0) {
            // The easiest way to bubble the revert reason is using memory via assembly
            /// @solidity memory-safe-assembly
            assembly {
                let returndata_size := mload(returndata)
                revert(add(32, returndata), returndata_size)
            }
        } else {
            revert(errorMessage);
        }
    }
}
"
    }
  },
  "settings": {
    "remappings": [
      "@openzeppelin-contracts-4.9.6/=dependencies/@openzeppelin-contracts-4.9.6/",
      "forge-std-1.11.0/=dependencies/forge-std-1.11.0/",
      "@openzeppelin/contracts/=dependencies/@openzeppelin-contracts-4.9.6/",
      "forge-std/=dependencies/forge-std-1.11.0/src/"
    ],
    "optimizer": {
      "enabled": false,
      "runs": 200
    },
    "metadata": {
      "useLiteralContent": false,
      "bytecodeHash": "ipfs",
      "appendCBOR": true
    },
    "outputSelection": {
      "*": {
        "*": [
          "evm.bytecode",
          "evm.deployedBytecode",
          "devdoc",
          "userdoc",
          "metadata",
          "abi"
        ]
      }
    },
    "evmVersion": "prague",
    "viaIR": false
  }
}}