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// SPDX-License-Identifier: MIT
pragma solidity 0.8.19;

import {AuthorizedReceiver} from "./AuthorizedReceiver.sol";
import {LinkTokenReceiver} from "./LinkTokenReceiver.sol";
import {ConfirmedOwner} from "../shared/access/ConfirmedOwner.sol";
import {LinkTokenInterface} from "../shared/interfaces/LinkTokenInterface.sol";
import {IAuthorizedReceiver} from "./interfaces/IAuthorizedReceiver.sol";
import {OperatorInterface} from "../interfaces/OperatorInterface.sol";
import {IOwnable} from "../shared/interfaces/IOwnable.sol";
import {IWithdrawal} from "./interfaces/IWithdrawal.sol";
import {OracleInterface} from "../interfaces/OracleInterface.sol";
import {SafeCast} from "../vendor/openzeppelin-solidity/v4.8.3/contracts/utils/math/SafeCast.sol";

// @title The Chainlink Operator contract
// @notice Node operators can deploy this contract to fulfill requests sent to them
// solhint-disable gas-custom-errors
contract Operator is AuthorizedReceiver, ConfirmedOwner, LinkTokenReceiver, OperatorInterface, IWithdrawal {
  struct Commitment {
    bytes31 paramsHash;
    uint8 dataVersion;
  }

  uint256 public constant EXPIRYTIME = 5 minutes;
  uint256 private constant MAXIMUM_DATA_VERSION = 256;
  uint256 private constant MINIMUM_CONSUMER_GAS_LIMIT = 400000;
  uint256 private constant SELECTOR_LENGTH = 4;
  uint256 private constant EXPECTED_REQUEST_WORDS = 2;
  uint256 private constant MINIMUM_REQUEST_LENGTH = SELECTOR_LENGTH + (32 * EXPECTED_REQUEST_WORDS);
  // We initialize fields to 1 instead of 0 so that the first invocation
  // does not cost more gas.
  uint256 private constant ONE_FOR_CONSISTENT_GAS_COST = 1;
  // oracleRequest is intended for version 1, enabling single word responses
  bytes4 private constant ORACLE_REQUEST_SELECTOR = this.oracleRequest.selector;
  // operatorRequest is intended for version 2, enabling multi-word responses
  bytes4 private constant OPERATOR_REQUEST_SELECTOR = this.operatorRequest.selector;

  LinkTokenInterface internal immutable i_linkToken;
  mapping(bytes32 => Commitment) private s_commitments;
  mapping(address => bool) private s_owned;
  // Tokens sent for requests that have not been fulfilled yet
  uint256 private s_tokensInEscrow = ONE_FOR_CONSISTENT_GAS_COST;

  event OracleRequest(
    bytes32 indexed specId,
    address requester,
    bytes32 requestId,
    uint256 payment,
    address callbackAddr,
    bytes4 callbackFunctionId,
    uint256 cancelExpiration,
    uint256 dataVersion,
    bytes data
  );

  event CancelOracleRequest(bytes32 indexed requestId);

  event OracleResponse(bytes32 indexed requestId);

  event OwnableContractAccepted(address indexed acceptedContract);

  event TargetsUpdatedAuthorizedSenders(address[] targets, address[] senders, address changedBy);

  // @notice Deploy with the address of the LINK token
  // @dev Sets the LinkToken address for the imported LinkTokenInterface
  // @param link The address of the LINK token
  // @param owner The address of the owner
  constructor(address link, address owner) ConfirmedOwner(owner) {
    i_linkToken = LinkTokenInterface(link); // external but already deployed and unalterable
  }

  string public constant typeAndVersion = "Operator 1.0.0";

  // @notice Creates the Chainlink request. This is a backwards compatible API
  // with the Oracle.sol contract, but the behavior changes because
  // callbackAddress is assumed to be the same as the request sender.
  // @param callbackAddress The consumer of the request
  // @param payment The amount of payment given (specified in wei)
  // @param specId The Job Specification ID
  // @param callbackAddress The address the oracle data will be sent to
  // @param callbackFunctionId The callback function ID for the response
  // @param nonce The nonce sent by the requester
  // @param dataVersion The specified data version
  // @param data The extra request parameters
  function oracleRequest(
    address sender,
    uint256 payment,
    bytes32 specId,
    address callbackAddress,
    bytes4 callbackFunctionId,
    uint256 nonce,
    uint256 dataVersion,
    bytes calldata data
  ) external override validateFromLINK {
    (bytes32 requestId, uint256 expiration) = _verifyAndProcessOracleRequest(
      sender,
      payment,
      callbackAddress,
      callbackFunctionId,
      nonce,
      dataVersion
    );
    emit OracleRequest(specId, sender, requestId, payment, sender, callbackFunctionId, expiration, dataVersion, data);
  }

  // @notice Creates the Chainlink request
  // @dev Stores the hash of the params as the on-chain commitment for the request.
  // Emits OracleRequest event for the Chainlink node to detect.
  // @param sender The sender of the request
  // @param payment The amount of payment given (specified in wei)
  // @param specId The Job Specification ID
  // @param callbackFunctionId The callback function ID for the response
  // @param nonce The nonce sent by the requester
  // @param dataVersion The specified data version
  // @param data The extra request parameters
  function operatorRequest(
    address sender,
    uint256 payment,
    bytes32 specId,
    bytes4 callbackFunctionId,
    uint256 nonce,
    uint256 dataVersion,
    bytes calldata data
  ) external override validateFromLINK {
    (bytes32 requestId, uint256 expiration) = _verifyAndProcessOracleRequest(
      sender,
      payment,
      sender,
      callbackFunctionId,
      nonce,
      dataVersion
    );
    emit OracleRequest(specId, sender, requestId, payment, sender, callbackFunctionId, expiration, dataVersion, data);
  }

  // @notice Called by the Chainlink node to fulfill requests
  // @dev Given params must hash back to the commitment stored from `oracleRequest`.
  // Will call the callback address' callback function without bubbling up error
  // checking in a `require` so that the node can get paid.
  // @param requestId The fulfillment request ID that must match the requester's
  // @param payment The payment amount that will be released for the oracle (specified in wei)
  // @param callbackAddress The callback address to call for fulfillment
  // @param callbackFunctionId The callback function ID to use for fulfillment
  // @param expiration The expiration that the node should respond by before the requester can cancel
  // @param data The data to return to the consuming contract
  // @return Status if the external call was successful
  function fulfillOracleRequest(
    bytes32 requestId,
    uint256 payment,
    address callbackAddress,
    bytes4 callbackFunctionId,
    uint256 expiration,
    bytes32 data
  )
    external
    override
    validateAuthorizedSender
    validateRequestId(requestId)
    validateCallbackAddress(callbackAddress)
    returns (bool)
  {
    _verifyOracleRequestAndProcessPayment(requestId, payment, callbackAddress, callbackFunctionId, expiration, 1);
    emit OracleResponse(requestId);
    require(gasleft() >= MINIMUM_CONSUMER_GAS_LIMIT, "Must provide consumer enough gas");
    // All updates to the oracle's fulfillment should come before calling the
    // callback(addr+functionId) as it is untrusted.
    // See: https://solidity.readthedocs.io/en/develop/security-considerations.html#use-the-checks-effects-interactions-pattern
    (bool success, ) = callbackAddress.call(abi.encodeWithSelector(callbackFunctionId, requestId, data)); // solhint-disable-line avoid-low-level-calls
    return success;
  }

  // @notice Called by the Chainlink node to fulfill requests with multi-word support
  // @dev Given params must hash back to the commitment stored from `oracleRequest`.
  // Will call the callback address' callback function without bubbling up error
  // checking in a `require` so that the node can get paid.
  // @param requestId The fulfillment request ID that must match the requester's
  // @param payment The payment amount that will be released for the oracle (specified in wei)
  // @param callbackAddress The callback address to call for fulfillment
  // @param callbackFunctionId The callback function ID to use for fulfillment
  // @param expiration The expiration that the node should respond by before the requester can cancel
  // @param data The data to return to the consuming contract
  // @return Status if the external call was successful
  function fulfillOracleRequest2(
    bytes32 requestId,
    uint256 payment,
    address callbackAddress,
    bytes4 callbackFunctionId,
    uint256 expiration,
    bytes calldata data
  )
    external
    override
    validateAuthorizedSender
    validateRequestId(requestId)
    validateCallbackAddress(callbackAddress)
    validateMultiWordResponseId(requestId, data)
    returns (bool)
  {
    _verifyOracleRequestAndProcessPayment(requestId, payment, callbackAddress, callbackFunctionId, expiration, 2);
    emit OracleResponse(requestId);
    require(gasleft() >= MINIMUM_CONSUMER_GAS_LIMIT, "Must provide consumer enough gas");
    // All updates to the oracle's fulfillment should come before calling the
    // callback(addr+functionId) as it is untrusted.
    // See: https://solidity.readthedocs.io/en/develop/security-considerations.html#use-the-checks-effects-interactions-pattern
    (bool success, ) = callbackAddress.call(abi.encodePacked(callbackFunctionId, data)); // solhint-disable-line avoid-low-level-calls
    return success;
  }

  // @notice Transfer the ownership of ownable contracts. This is primarily
  // intended for Authorized Forwarders but could possibly be extended to work
  // with future contracts.OracleInterface
  // @param ownable list of addresses to transfer
  // @param newOwner address to transfer ownership to
  function transferOwnableContracts(address[] calldata ownable, address newOwner) external onlyOwner {
    for (uint256 i = 0; i < ownable.length; ++i) {
      s_owned[ownable[i]] = false;
      IOwnable(ownable[i]).transferOwnership(newOwner);
    }
  }

  // @notice Accept the ownership of an ownable contract. This is primarily
  // intended for Authorized Forwarders but could possibly be extended to work
  // with future contracts.
  // @dev Must be the pending owner on the contract
  // @param ownable list of addresses of Ownable contracts to accept
  function acceptOwnableContracts(address[] calldata ownable) public validateAuthorizedSenderSetter {
    for (uint256 i = 0; i < ownable.length; ++i) {
      s_owned[ownable[i]] = true;
      emit OwnableContractAccepted(ownable[i]);
      IOwnable(ownable[i]).acceptOwnership();
    }
  }

  // @notice Sets the fulfillment permission for
  // @param targets The addresses to set permissions on
  // @param senders The addresses that are allowed to send updates
  function setAuthorizedSendersOn(
    address[] calldata targets,
    address[] calldata senders
  ) public validateAuthorizedSenderSetter {
    emit TargetsUpdatedAuthorizedSenders(targets, senders, msg.sender);

    for (uint256 i = 0; i < targets.length; ++i) {
      IAuthorizedReceiver(targets[i]).setAuthorizedSenders(senders);
    }
  }

  // @notice Accepts ownership of ownable contracts and then immediately sets
  // the authorized sender list on each of the newly owned contracts. This is
  // primarily intended for Authorized Forwarders but could possibly be
  // extended to work with future contracts.
  // @param targets The addresses to set permissions on
  // @param senders The addresses that are allowed to send updates
  function acceptAuthorizedReceivers(
    address[] calldata targets,
    address[] calldata senders
  ) external validateAuthorizedSenderSetter {
    acceptOwnableContracts(targets);
    setAuthorizedSendersOn(targets, senders);
  }

  // @notice Allows the node operator to withdraw earned LINK to a given address
  // @dev The owner of the contract can be another wallet and does not have to be a Chainlink node
  // @param recipient The address to send the LINK token to
  // @param amount The amount to send (specified in wei)
  function withdraw(
    address recipient,
    uint256 amount
  ) external override(OracleInterface, IWithdrawal) onlyOwner validateAvailableFunds(amount) {
    assert(i_linkToken.transfer(recipient, amount));
  }

  // @notice Displays the amount of LINK that is available for the node operator to withdraw
  // @dev We use `ONE_FOR_CONSISTENT_GAS_COST` in place of 0 in storage
  // @return The amount of withdrawable LINK on the contract
  function withdrawable() external view override(OracleInterface, IWithdrawal) returns (uint256) {
    return _fundsAvailable();
  }

  // @notice Forward a call to another contract
  // @dev Only callable by the owner
  // @param to address
  // @param data to forward
  function ownerForward(address to, bytes calldata data) external onlyOwner validateNotToLINK(to) {
    require(to.code.length != 0, "Must forward to a contract");
    // solhint-disable-next-line avoid-low-level-calls
    (bool status, ) = to.call(data);
    require(status, "Forwarded call failed");
  }

  // @notice Interact with other LinkTokenReceiver contracts by calling transferAndCall
  // @param to The address to transfer to.
  // @param value The amount to be transferred.
  // @param data The extra data to be passed to the receiving contract.
  // @return success bool
  function ownerTransferAndCall(
    address to,
    uint256 value,
    bytes calldata data
  ) external override onlyOwner validateAvailableFunds(value) returns (bool success) {
    return i_linkToken.transferAndCall(to, value, data);
  }

  // @notice Distribute funds to multiple addresses using ETH send
  // to this payable function.
  // @dev Array length must be equal, ETH sent must equal the sum of amounts.
  // A malicious receiver could cause the distribution to revert, in which case
  // it is expected that the address is removed from the list.
  // @param receivers list of addresses
  // @param amounts list of amounts
  function distributeFunds(address payable[] calldata receivers, uint256[] calldata amounts) external payable {
    require(receivers.length > 0 && receivers.length == amounts.length, "Invalid array length(s)");
    uint256 valueRemaining = msg.value;
    for (uint256 i = 0; i < receivers.length; ++i) {
      uint256 sendAmount = amounts[i];
      valueRemaining = valueRemaining - sendAmount;
      (bool success, ) = receivers[i].call{value: sendAmount}("");
      require(success, "Address: unable to send value, recipient may have reverted");
    }
    require(valueRemaining == 0, "Too much ETH sent");
  }

  // @notice Allows recipient to cancel requests sent to this oracle contract.
  // Will transfer the LINK sent for the request back to the recipient address.
  // @dev Given params must hash to a commitment stored on the contract in order
  // for the request to be valid. Emits CancelOracleRequest event.
  // @param requestId The request ID
  // @param payment The amount of payment given (specified in wei)
  // @param callbackFunc The requester's specified callback function selector
  // @param expiration The time of the expiration for the request
  function cancelOracleRequest(
    bytes32 requestId,
    uint256 payment,
    bytes4 callbackFunc,
    uint256 expiration
  ) public override {
    bytes31 paramsHash = _buildParamsHash(payment, msg.sender, callbackFunc, expiration);
    require(s_commitments[requestId].paramsHash == paramsHash, "Params do not match request ID");
    // solhint-disable-next-line not-rely-on-time
    require(expiration <= block.timestamp, "Request is not expired");

    delete s_commitments[requestId];
    emit CancelOracleRequest(requestId);

    // Free up the escrowed funds, as we're sending them back to the requester
    s_tokensInEscrow -= payment;
    i_linkToken.transfer(msg.sender, payment);
  }

  // @notice Allows requester to cancel requests sent to this oracle contract.
  // Will transfer the LINK sent for the request back to the recipient address.
  // @dev Given params must hash to a commitment stored on the contract in order
  // for the request to be valid. Emits CancelOracleRequest event.
  // @param nonce The nonce used to generate the request ID
  // @param payment The amount of payment given (specified in wei)
  // @param callbackFunc The requester's specified callback function selector
  // @param expiration The time of the expiration for the request
  function cancelOracleRequestByRequester(
    uint256 nonce,
    uint256 payment,
    bytes4 callbackFunc,
    uint256 expiration
  ) external {
    cancelOracleRequest(keccak256(abi.encodePacked(msg.sender, nonce)), payment, callbackFunc, expiration);
  }

  // @notice Returns the address of the LINK token
  // @dev This is the public implementation for chainlinkTokenAddress, which is
  // an internal method of the ChainlinkClient contract
  function getChainlinkToken() public view override returns (address) {
    return address(i_linkToken);
  }

  // @notice Require that the token transfer action is valid
  // @dev OPERATOR_REQUEST_SELECTOR = multiword, ORACLE_REQUEST_SELECTOR = singleword
  function _validateTokenTransferAction(bytes4 funcSelector, bytes memory data) internal pure override {
    require(data.length >= MINIMUM_REQUEST_LENGTH, "Invalid request length");
    require(
      funcSelector == OPERATOR_REQUEST_SELECTOR || funcSelector == ORACLE_REQUEST_SELECTOR,
      "Must use whitelisted functions"
    );
  }

  // @notice Verify the Oracle Request and record necessary information
  // @param sender The sender of the request
  // @param payment The amount of payment given (specified in wei)
  // @param callbackAddress The callback address for the response
  // @param callbackFunctionId The callback function ID for the response
  // @param nonce The nonce sent by the requester
  function _verifyAndProcessOracleRequest(
    address sender,
    uint256 payment,
    address callbackAddress,
    bytes4 callbackFunctionId,
    uint256 nonce,
    uint256 dataVersion
  ) private validateNotToLINK(callbackAddress) returns (bytes32 requestId, uint256 expiration) {
    requestId = keccak256(abi.encodePacked(sender, nonce));
    require(s_commitments[requestId].paramsHash == 0, "Must use a unique ID");
    // solhint-disable-next-line not-rely-on-time
    expiration = block.timestamp + EXPIRYTIME;
    bytes31 paramsHash = _buildParamsHash(payment, callbackAddress, callbackFunctionId, expiration);
    s_commitments[requestId] = Commitment(paramsHash, SafeCast.toUint8(dataVersion));
    s_tokensInEscrow = s_tokensInEscrow + payment;
    return (requestId, expiration);
  }

  // @notice Verify the Oracle request and unlock escrowed payment
  // @param requestId The fulfillment request ID that must match the requester's
  // @param payment The payment amount that will be released for the oracle (specified in wei)
  // @param callbackAddress The callback address to call for fulfillment
  // @param callbackFunctionId The callback function ID to use for fulfillment
  // @param expiration The expiration that the node should respond by before the requester can cancel
  function _verifyOracleRequestAndProcessPayment(
    bytes32 requestId,
    uint256 payment,
    address callbackAddress,
    bytes4 callbackFunctionId,
    uint256 expiration,
    uint256 dataVersion
  ) internal {
    bytes31 paramsHash = _buildParamsHash(payment, callbackAddress, callbackFunctionId, expiration);
    require(s_commitments[requestId].paramsHash == paramsHash, "Params do not match request ID");
    require(s_commitments[requestId].dataVersion <= SafeCast.toUint8(dataVersion), "Data versions must match");
    s_tokensInEscrow = s_tokensInEscrow - payment;
    delete s_commitments[requestId];
  }

  // @notice Build the bytes31 hash from the payment, callback and expiration.
  // @param payment The payment amount that will be released for the oracle (specified in wei)
  // @param callbackAddress The callback address to call for fulfillment
  // @param callbackFunctionId The callback function ID to use for fulfillment
  // @param expiration The expiration that the node should respond by before the requester can cancel
  // @return hash bytes31
  function _buildParamsHash(
    uint256 payment,
    address callbackAddress,
    bytes4 callbackFunctionId,
    uint256 expiration
  ) internal pure returns (bytes31) {
    return bytes31(keccak256(abi.encodePacked(payment, callbackAddress, callbackFunctionId, expiration)));
  }

  // @notice Returns the LINK available in this contract, not locked in escrow
  // @return uint256 LINK tokens available
  function _fundsAvailable() private view returns (uint256) {
    return i_linkToken.balanceOf(address(this)) - (s_tokensInEscrow - ONE_FOR_CONSISTENT_GAS_COST);
  }

  // @notice concrete implementation of AuthorizedReceiver
  // @return bool of whether sender is authorized
  function _canSetAuthorizedSenders() internal view override returns (bool) {
    return isAuthorizedSender(msg.sender) || owner() == msg.sender;
  }

  // MODIFIERS

  // @dev Reverts if the first 32 bytes of the bytes array is not equal to requestId
  // @param requestId bytes32
  // @param data bytes
  modifier validateMultiWordResponseId(bytes32 requestId, bytes calldata data) {
    require(data.length >= 32, "Response must be > 32 bytes");
    bytes32 firstDataWord;
    assembly {
      firstDataWord := calldataload(data.offset)
    }
    require(requestId == firstDataWord, "First word must be requestId");
    _;
  }

  // @dev Reverts if amount requested is greater than withdrawable balance
  // @param amount The given amount to compare to `s_withdrawableTokens`
  modifier validateAvailableFunds(uint256 amount) {
    require(_fundsAvailable() >= amount, "Amount requested is greater than withdrawable balance");
    _;
  }

  // @dev Reverts if request ID does not exist
  // @param requestId The given request ID to check in stored `commitments`
  modifier validateRequestId(bytes32 requestId) {
    require(s_commitments[requestId].paramsHash != 0, "Must have a valid requestId");
    _;
  }

  // @dev Reverts if the callback address is the LINK token
  // @param to The callback address
  modifier validateNotToLINK(address to) {
    require(to != address(i_linkToken), "Cannot call to LINK");
    _;
  }

  // @dev Reverts if the target address is owned by the operator
  modifier validateCallbackAddress(address callbackAddress) {
    require(!s_owned[callbackAddress], "Cannot call owned contract");
    _;
  }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

interface ChainlinkRequestInterface {
  function oracleRequest(
    address sender,
    uint256 requestPrice,
    bytes32 serviceAgreementID,
    address callbackAddress,
    bytes4 callbackFunctionId,
    uint256 nonce,
    uint256 dataVersion,
    bytes calldata data
  ) external;

  function cancelOracleRequest(
    bytes32 requestId,
    uint256 payment,
    bytes4 callbackFunctionId,
    uint256 expiration
  ) external;
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import {OracleInterface} from "./OracleInterface.sol";
import {ChainlinkRequestInterface} from "./ChainlinkRequestInterface.sol";

interface OperatorInterface is OracleInterface, ChainlinkRequestInterface {
  function operatorRequest(
    address sender,
    uint256 payment,
    bytes32 specId,
    bytes4 callbackFunctionId,
    uint256 nonce,
    uint256 dataVersion,
    bytes calldata data
  ) external;

  function fulfillOracleRequest2(
    bytes32 requestId,
    uint256 payment,
    address callbackAddress,
    bytes4 callbackFunctionId,
    uint256 expiration,
    bytes calldata data
  ) external returns (bool);

  function ownerTransferAndCall(address to, uint256 value, bytes calldata data) external returns (bool success);

  function distributeFunds(address payable[] calldata receivers, uint256[] calldata amounts) external payable;
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

interface OracleInterface {
  function fulfillOracleRequest(
    bytes32 requestId,
    uint256 payment,
    address callbackAddress,
    bytes4 callbackFunctionId,
    uint256 expiration,
    bytes32 data
  ) external returns (bool);

  function withdraw(address recipient, uint256 amount) external;

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

// SPDX-License-Identifier: MIT
pragma solidity 0.8.19;

import {IAuthorizedReceiver} from "./interfaces/IAuthorizedReceiver.sol";

// solhint-disable gas-custom-errors
abstract contract AuthorizedReceiver is IAuthorizedReceiver {
  mapping(address sender => bool authorized) private s_authorizedSenders;
  address[] private s_authorizedSenderList;

  event AuthorizedSendersChanged(address[] senders, address changedBy);

  // @notice Sets the fulfillment permission for a given node. Use `true` to allow, `false` to disallow.
  // @param senders The addresses of the authorized Chainlink node
  function setAuthorizedSenders(address[] calldata senders) external override validateAuthorizedSenderSetter {
    require(senders.length > 0, "Must have at least 1 sender");
    // Set previous authorized senders to false
    uint256 authorizedSendersLength = s_authorizedSenderList.length;
    for (uint256 i = 0; i < authorizedSendersLength; ++i) {
      s_authorizedSenders[s_authorizedSenderList[i]] = false;
    }
    // Set new to true
    for (uint256 i = 0; i < senders.length; ++i) {
      require(s_authorizedSenders[senders[i]] == false, "Must not have duplicate senders");
      s_authorizedSenders[senders[i]] = true;
    }
    // Replace list
    s_authorizedSenderList = senders;
    emit AuthorizedSendersChanged(senders, msg.sender);
  }

  // @notice Retrieve a list of authorized senders
  // @return array of addresses
  function getAuthorizedSenders() external view override returns (address[] memory) {
    return s_authorizedSenderList;
  }

  // @notice Use this to check if a node is authorized for fulfilling requests
  // @param sender The address of the Chainlink node
  // @return The authorization status of the node
  function isAuthorizedSender(address sender) public view override returns (bool) {
    return s_authorizedSenders[sender];
  }

  // @notice customizable guard of who can update the authorized sender list
  // @return bool whether sender can update authorized sender list
  function _canSetAuthorizedSenders() internal virtual returns (bool);

  // @notice validates the sender is an authorized sender
  function _validateIsAuthorizedSender() internal view {
    require(isAuthorizedSender(msg.sender), "Not authorized sender");
  }

  // @notice prevents non-authorized addresses from calling this method
  modifier validateAuthorizedSender() {
    _validateIsAuthorizedSender();
    _;
  }

  // @notice prevents non-authorized addresses from calling this method
  modifier validateAuthorizedSenderSetter() {
    require(_canSetAuthorizedSenders(), "Cannot set authorized senders");
    _;
  }
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.19;

// solhint-disable gas-custom-errors
abstract contract LinkTokenReceiver {
  // @notice Called when LINK is sent to the contract via `transferAndCall`
  // @dev The data payload's first 2 words will be overwritten by the `sender` and `amount`
  // values to ensure correctness. Calls oracleRequest.
  // @param sender Address of the sender
  // @param amount Amount of LINK sent (specified in wei)
  // @param data Payload of the transaction
  function onTokenTransfer(
    address sender,
    uint256 amount,
    bytes memory data
  ) public validateFromLINK permittedFunctionsForLINK(data) {
    assembly {
      // solhint-disable-next-line avoid-low-level-calls
      mstore(add(data, 36), sender) // ensure correct sender is passed
      // solhint-disable-next-line avoid-low-level-calls
      mstore(add(data, 68), amount) // ensure correct amount is passed0.8.19
    }
    // solhint-disable-next-line avoid-low-level-calls
    (bool success, ) = address(this).delegatecall(data); // calls oracleRequest
    require(success, "Unable to create request");
  }

  function getChainlinkToken() public view virtual returns (address);

  // @notice Validate the function called on token transfer
  function _validateTokenTransferAction(bytes4 funcSelector, bytes memory data) internal virtual;

  // @dev Reverts if not sent from the LINK token
  modifier validateFromLINK() {
    require(msg.sender == getChainlinkToken(), "Must use LINK token");
    _;
  }

  // @dev Reverts if the given data does not begin with the `oracleRequest` function selector
  // @param data The data payload of the request
  modifier permittedFunctionsForLINK(bytes memory data) {
    bytes4 funcSelector;
    assembly {
      // solhint-disable-next-line avoid-low-level-calls
      funcSelector := mload(add(data, 32))
    }
    _validateTokenTransferAction(funcSelector, data);
    _;
  }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

interface IAuthorizedReceiver {
  function isAuthorizedSender(address sender) external view returns (bool);

  function getAuthorizedSenders() external returns (address[] memory);

  function setAuthorizedSenders(address[] calldata senders) external;
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

interface IWithdrawal {
  // @notice transfer LINK held by the contract belonging to msg.sender to
  // another address
  // @param recipient is the address to send the LINK to
  // @param amount is the amount of LINK to send
  function withdraw(address recipient, uint256 amount) external;

  // @notice query the available amount of LINK to withdraw by msg.sender
  function withdrawable() external view returns (uint256);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

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

/// @title The ConfirmedOwner contract
/// @notice A contract with helpers for basic contract ownership.
contract ConfirmedOwner is ConfirmedOwnerWithProposal {
  constructor(address newOwner) ConfirmedOwnerWithProposal(newOwner, address(0)) {}
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import {IOwnable} from "../interfaces/IOwnable.sol";

/// @title The ConfirmedOwner contract
/// @notice A contract with helpers for basic contract ownership.
contract ConfirmedOwnerWithProposal is IOwnable {
  address private s_owner;
  address private s_pendingOwner;

  event OwnershipTransferRequested(address indexed from, address indexed to);
  event OwnershipTransferred(address indexed from, address indexed to);

  constructor(address newOwner, address pendingOwner) {
    // solhint-disable-next-line gas-custom-errors
    require(newOwner != address(0), "Cannot set owner to zero");

    s_owner = newOwner;
    if (pendingOwner != address(0)) {
      _transferOwnership(pendingOwner);
    }
  }

  /// @notice Allows an owner to begin transferring ownership to a new address.
  function transferOwnership(address to) public override onlyOwner {
    _transferOwnership(to);
  }

  /// @notice Allows an ownership transfer to be completed by the recipient.
  function acceptOwnership() external override {
    // solhint-disable-next-line gas-custom-errors
    require(msg.sender == s_pendingOwner, "Must be proposed owner");

    address oldOwner = s_owner;
    s_owner = msg.sender;
    s_pendingOwner = address(0);

    emit OwnershipTransferred(oldOwner, msg.sender);
  }

  /// @notice Get the current owner
  function owner() public view override returns (address) {
    return s_owner;
  }

  /// @notice validate, transfer ownership, and emit relevant events
  function _transferOwnership(address to) private {
    // solhint-disable-next-line gas-custom-errors
    require(to != msg.sender, "Cannot transfer to self");

    s_pendingOwner = to;

    emit OwnershipTransferRequested(s_owner, to);
  }

  /// @notice validate access
  function _validateOwnership() internal view {
    // solhint-disable-next-line gas-custom-errors
    require(msg.sender == s_owner, "Only callable by owner");
  }

  /// @notice Reverts if called by anyone other than the contract owner.
  modifier onlyOwner() {
    _validateOwnership();
    _;
  }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

interface IOwnable {
  function owner() external returns (address);

  function transferOwnership(address recipient) external;

  function acceptOwnership() external;
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

interface LinkTokenInterface {
  function allowance(address owner, address spender) external view returns (uint256 remaining);

  function approve(address spender, uint256 value) external returns (bool success);

  function balanceOf(address owner) external view returns (uint256 balance);

  function decimals() external view returns (uint8 decimalPlaces);

  function decreaseApproval(address spender, uint256 addedValue) external returns (bool success);

  function increaseApproval(address spender, uint256 subtractedValue) external;

  function name() external view returns (string memory tokenName);

  function symbol() external view returns (string memory tokenSymbol);

  function totalSupply() external view returns (uint256 totalTokensIssued);

  function transfer(address to, uint256 value) external returns (bool success);

  function transferAndCall(address to, uint256 value, bytes calldata data) external returns (bool success);

  function transferFrom(address from, address to, uint256 value) external returns (bool success);
}

// 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);
  }
}

{
  "remappings": [
    "ds-test/=foundry-lib/forge-std/lib/ds-test/src/",
    "forge-std/=foundry-lib/forge-std/src/",
    "@openzeppelin/=node_modules/@openzeppelin/",
    "hardhat/=node_modules/hardhat/",
    "@eth-optimism/=node_modules/@eth-optimism/",
    "@scroll-tech/=node_modules/@scroll-tech/",
    "erc4626-tests/=foundry-lib/openzeppelin-contracts/lib/erc4626-tests/",
    "openzeppelin-contracts/=foundry-lib/openzeppelin-contracts/"
  ],
  "optimizer": {
    "enabled": true,
    "runs": 1000000
  },
  "metadata": {
    "useLiteralContent": false,
    "bytecodeHash": "none",
    "appendCBOR": true
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "evmVersion": "paris",
  "viaIR": false,
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

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ype":"function"},{"inputs":[],"name":"withdrawable","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"}]

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