// SPDX-License-Identifier: BUSL-1.1
pragma solidity ^0.8.24;

import {IFeeQuoter} from "./interfaces/IFeeQuoter.sol";
import {IPriceRegistry} from "./interfaces/IPriceRegistry.sol";
import {IReceiver} from "@chainlink/contracts/src/v0.8/keystone/interfaces/IReceiver.sol";
import {ITypeAndVersion} from "@chainlink/contracts/src/v0.8/shared/interfaces/ITypeAndVersion.sol";

import {Client} from "./libraries/Client.sol";
import {Internal} from "./libraries/Internal.sol";
import {Pool} from "./libraries/Pool.sol";
import {USDPriceWith18Decimals} from "./libraries/USDPriceWith18Decimals.sol";
import {KeystoneFeedsPermissionHandler} from "@chainlink/contracts/src/v0.8/keystone/KeystoneFeedsPermissionHandler.sol";
import {KeystoneFeedDefaultMetadataLib} from
  "@chainlink/contracts/src/v0.8/keystone/lib/KeystoneFeedDefaultMetadataLib.sol";
import {AuthorizedCallers} from "@chainlink/contracts/src/v0.8/shared/access/AuthorizedCallers.sol";
import {AggregatorV3Interface} from "@chainlink/contracts/src/v0.8/shared/interfaces/AggregatorV3Interface.sol";

import {IERC165} from
  "@chainlink/contracts/src/v0.8/vendor/openzeppelin-solidity/v5.0.2/contracts/interfaces/IERC165.sol";
import {EnumerableSet} from
  "@chainlink/contracts/src/v0.8/vendor/openzeppelin-solidity/v5.0.2/contracts/utils/structs/EnumerableSet.sol";

/// @notice The FeeQuoter contract responsibility is to:
///   - Store the current gas price in USD for a given destination chain.
///   - Store the price of a token in USD allowing the owner or priceUpdater to update this value.
///   - Manage chain specific fee calculations.
/// The authorized callers in the contract represent the fee price updaters.
contract FeeQuoter is AuthorizedCallers, IFeeQuoter, ITypeAndVersion, IReceiver, KeystoneFeedsPermissionHandler {
  using EnumerableSet for EnumerableSet.AddressSet;
  using USDPriceWith18Decimals for uint224;
  using KeystoneFeedDefaultMetadataLib for bytes;

  error TokenNotSupported(address token);
  error FeeTokenNotSupported(address token);
  error StaleGasPrice(uint64 destChainSelector, uint256 threshold, uint256 timePassed);
  error DataFeedValueOutOfUint224Range();
  error InvalidDestBytesOverhead(address token, uint32 destBytesOverhead);
  error MessageGasLimitTooHigh();
  error MessageComputeUnitLimitTooHigh();
  error DestinationChainNotEnabled(uint64 destChainSelector);
  error ExtraArgOutOfOrderExecutionMustBeTrue();
  error InvalidExtraArgsTag();
  error InvalidExtraArgsData();
  error SourceTokenDataTooLarge(address token);
  error InvalidDestChainConfig(uint64 destChainSelector);
  error MessageFeeTooHigh(uint256 msgFeeJuels, uint256 maxFeeJuelsPerMsg);
  error InvalidStaticConfig();
  error MessageTooLarge(uint256 maxSize, uint256 actualSize);
  error UnsupportedNumberOfTokens(uint256 numberOfTokens, uint256 maxNumberOfTokensPerMsg);
  error InvalidFeeRange(uint256 minFeeUSDCents, uint256 maxFeeUSDCents);
  error InvalidChainFamilySelector(bytes4 chainFamilySelector);
  error InvalidTokenReceiver();
  error TooManySVMExtraArgsAccounts(uint256 numAccounts, uint256 maxAccounts);
  error InvalidSVMExtraArgsWritableBitmap(uint64 accountIsWritableBitmap, uint256 numAccounts);

  event FeeTokenAdded(address indexed feeToken);
  event FeeTokenRemoved(address indexed feeToken);
  event UsdPerUnitGasUpdated(uint64 indexed destChain, uint256 value, uint256 timestamp);
  event UsdPerTokenUpdated(address indexed token, uint256 value, uint256 timestamp);
  event PriceFeedPerTokenUpdated(address indexed token, TokenPriceFeedConfig priceFeedConfig);
  event TokenTransferFeeConfigUpdated(
    uint64 indexed destChainSelector, address indexed token, TokenTransferFeeConfig tokenTransferFeeConfig
  );
  event TokenTransferFeeConfigDeleted(uint64 indexed destChainSelector, address indexed token);
  event PremiumMultiplierWeiPerEthUpdated(address indexed token, uint64 premiumMultiplierWeiPerEth);
  event DestChainConfigUpdated(uint64 indexed destChainSelector, DestChainConfig destChainConfig);
  event DestChainAdded(uint64 indexed destChainSelector, DestChainConfig destChainConfig);

  /// @dev Contains token price configuration used in both the keystone price updates and the price feed fallback logic.
  struct TokenPriceFeedConfig {
    address dataFeedAddress; // ─╮ Price feed contract. Can be address(0) to indicate no feed is configured.
    uint8 tokenDecimals; //      │ Decimals of the token, used for both keystone and price feed decimal multiplications.
    bool isEnabled; // ──────────╯ Whether the token is configured to receive keystone and/or price feed updates.
  }

  /// @dev Token price data feed update.
  struct TokenPriceFeedUpdate {
    address sourceToken; // Source token to update feed for.
    TokenPriceFeedConfig feedConfig; // Feed config update data.
  }

  /// @dev Struct that contains the static configuration.
  /// RMN depends on this struct, if changing, please notify the RMN maintainers.
  // solhint-disable-next-line gas-struct-packing
  struct StaticConfig {
    uint96 maxFeeJuelsPerMsg; // ─╮ Maximum fee that can be charged for a message.
    address linkToken; // ────────╯ LINK token address.
    // The amount of time a token price can be stale before it is considered invalid. Gas price staleness is configured
    // per dest chain.
    uint32 tokenPriceStalenessThreshold;
  }

  /// @dev The struct representing the received CCIP feed report from keystone IReceiver.onReport().
  struct ReceivedCCIPFeedReport {
    address token; //       Token address.
    uint224 price; // ────╮ Price of the token in USD with 18 decimals.
    uint32 timestamp; // ─╯ Timestamp of the price update.
  }

  /// @dev Struct to hold the fee & validation configs for a destination chain.
  struct DestChainConfig {
    bool isEnabled; // ─────────────────────────╮ Whether this destination chain is enabled.
    uint16 maxNumberOfTokensPerMsg; //          │ Maximum number of distinct ERC20 tokens transferred per message.
    uint32 maxDataBytes; //                     │ Maximum data payload size in bytes.
    uint32 maxPerMsgGasLimit; //                │ Maximum gas limit for messages targeting EVMs.
    uint32 destGasOverhead; //                  │ Gas charged on top of the gasLimit to cover destination chain costs.
    uint8 destGasPerPayloadByteBase; //         │ Default dest-chain gas charged each byte of `data` payload.
    uint8 destGasPerPayloadByteHigh; //         │ High dest-chain gas charged each byte of `data` payload, used to account for eip-7623.
    uint16 destGasPerPayloadByteThreshold; //   │ The value at which the billing switches from destGasPerPayloadByteBase to destGasPerPayloadByteHigh.
    uint32 destDataAvailabilityOverheadGas; //  │ Data availability gas charged for overhead costs e.g. for OCR.
    uint16 destGasPerDataAvailabilityByte; //   │ Gas units charged per byte of message data that needs availability.
    uint16 destDataAvailabilityMultiplierBps; //│ Multiplier for data availability gas, multiples of bps, or 0.0001.
    bytes4 chainFamilySelector; //              │ Selector that identifies the destination chain's family. Used to determine the correct validations to perform for the dest chain.
    bool enforceOutOfOrder; // ─────────────────╯ Whether to enforce the allowOutOfOrderExecution extraArg value to be true.
    // The following three properties are defaults, they can be overridden by setting the TokenTransferFeeConfig for a token.
    uint16 defaultTokenFeeUSDCents; // ────╮ Default token fee charged per token transfer.
    uint32 defaultTokenDestGasOverhead; // │ Default gas charged to execute a token transfer on the destination chain.
    uint32 defaultTxGasLimit; //           │ Default gas limit for a tx.
    uint64 gasMultiplierWeiPerEth; //      │ Multiplier for gas costs, 1e18 based so 11e17 = 10% extra cost.
    uint32 gasPriceStalenessThreshold; //  │ The amount of time a gas price can be stale before it is considered invalid (0 means disabled).
    uint32 networkFeeUSDCents; // ─────────╯ Flat network fee to charge for messages, multiples of 0.01 USD.
  }

  /// @dev Struct to hold the configs and its destination chain selector. Same as DestChainConfig but with the
  /// destChainSelector so that an array of these can be passed in the constructor and applyDestChainConfigUpdates.
  /// solhint-disable gas-struct-packing
  struct DestChainConfigArgs {
    uint64 destChainSelector; // Destination chain selector.
    DestChainConfig destChainConfig; // Config to update for the chain selector.
  }

  /// @dev Struct with transfer fee configuration for token transfers.
  struct TokenTransferFeeConfig {
    uint32 minFeeUSDCents; // ───╮ Minimum fee to charge per token transfer, multiples of 0.01 USD.
    uint32 maxFeeUSDCents; //    │ Maximum fee to charge per token transfer, multiples of 0.01 USD.
    uint16 deciBps; //           │ Basis points charged on token transfers, multiples of 0.1bps, or 1e-5.
    uint32 destGasOverhead; //   │ Gas charged to execute the token transfer on the destination chain.
    //                           │ Data availability bytes that are returned from the source pool and sent to the dest
    uint32 destBytesOverhead; // │ pool. Must be >= Pool.CCIP_LOCK_OR_BURN_V1_RET_BYTES. Set as multiple of 32 bytes.
    bool isEnabled; // ──────────╯ Whether this token has custom transfer fees.
  }

  /// @dev Struct with token transfer fee configurations for a token, same as TokenTransferFeeConfig but with the token
  /// address included.
  struct TokenTransferFeeConfigSingleTokenArgs {
    address token; // Token address.
    TokenTransferFeeConfig tokenTransferFeeConfig; // Struct to hold the transfer fee configuration for token transfers.
  }

  /// @dev Struct with args for setting the token transfer fee configurations for a destination chain and a set of tokens.
  struct TokenTransferFeeConfigArgs {
    uint64 destChainSelector; // Destination chain selector.
    TokenTransferFeeConfigSingleTokenArgs[] tokenTransferFeeConfigs; // Array of token transfer fee configurations.
  }

  /// @dev Struct with a pair of destination chain selector and token address so that an array of these can be passed in
  /// the applyTokenTransferFeeConfigUpdates function to remove the token transfer fee configuration for a token.
  struct TokenTransferFeeConfigRemoveArgs {
    uint64 destChainSelector; // ─╮ Destination chain selector.
    address token; // ────────────╯ Token address.
  }

  /// @dev Struct with fee token configuration for a token.
  struct PremiumMultiplierWeiPerEthArgs {
    address token; // // ──────────────────╮ Token address.
    uint64 premiumMultiplierWeiPerEth; // ─╯ Multiplier for destination chain specific premiums.
  }

  /// @dev The base decimals for cost calculations.
  uint256 public constant FEE_BASE_DECIMALS = 36;
  /// @dev The decimals that Keystone reports prices in.
  uint256 public constant KEYSTONE_PRICE_DECIMALS = 18;

  string public constant override typeAndVersion = "FeeQuoter 1.6.0";

  /// @dev The gas price per unit of gas for a given destination chain, in USD with 18 decimals. Multiple gas prices can
  /// be encoded into the same value. Each price takes {Internal.GAS_PRICE_BITS} bits. For example, if Optimism is the
  /// destination chain, gas price can include L1 base fee and L2 gas price. Logic to parse the price components is
  ///  chain-specific, and should live in OnRamp.
  /// @dev Price of 1e18 is 1 USD. Examples:
  ///     Very Expensive:   1 unit of gas costs 1 USD                  -> 1e18.
  ///     Expensive:        1 unit of gas costs 0.1 USD                -> 1e17.
  ///     Cheap:            1 unit of gas costs 0.000001 USD           -> 1e12.
  mapping(uint64 destChainSelector => Internal.TimestampedPackedUint224 price) private
    s_usdPerUnitGasByDestChainSelector;

  /// @dev The price, in USD with 18 decimals, per 1e18 of the smallest token denomination.
  /// @dev Price of 1e18 represents 1 USD per 1e18 token amount.
  ///     1 USDC = 1.00 USD per full token, each full token is 1e6 units -> 1 * 1e18 * 1e18 / 1e6 = 1e30.
  ///     1 ETH = 2,000 USD per full token, each full token is 1e18 units -> 2000 * 1e18 * 1e18 / 1e18 = 2_000e18.
  ///     1 LINK = 5.00 USD per full token, each full token is 1e18 units -> 5 * 1e18 * 1e18 / 1e18 = 5e18.
  mapping(address token => Internal.TimestampedPackedUint224 price) private s_usdPerToken;

  /// @dev Stores the price data feed configurations per token.
  mapping(address token => TokenPriceFeedConfig dataFeedAddress) private s_usdPriceFeedsPerToken;

  /// @dev The multiplier for destination chain specific premiums that can be set by the owner or fee admin.
  mapping(address token => uint64 premiumMultiplierWeiPerEth) private s_premiumMultiplierWeiPerEth;

  /// @dev The destination chain specific fee configs.
  mapping(uint64 destChainSelector => DestChainConfig destChainConfig) internal s_destChainConfigs;

  /// @dev The token transfer fee config that can be set by the owner or fee admin.
  mapping(uint64 destChainSelector => mapping(address token => TokenTransferFeeConfig tranferFeeConfig)) private
    s_tokenTransferFeeConfig;

  /// @dev Maximum fee that can be charged for a message. This is a guard to prevent massively overcharging due to
  /// misconfiguration.
  uint96 internal immutable i_maxFeeJuelsPerMsg;
  /// @dev The link token address.
  address internal immutable i_linkToken;

  /// @dev Subset of tokens which prices tracked by this registry which are fee tokens.
  EnumerableSet.AddressSet private s_feeTokens;
  /// @dev The amount of time a token price can be stale before it is considered invalid.
  uint32 private immutable i_tokenPriceStalenessThreshold;

  constructor(
    StaticConfig memory staticConfig,
    address[] memory priceUpdaters,
    address[] memory feeTokens,
    TokenPriceFeedUpdate[] memory tokenPriceFeeds,
    TokenTransferFeeConfigArgs[] memory tokenTransferFeeConfigArgs,
    PremiumMultiplierWeiPerEthArgs[] memory premiumMultiplierWeiPerEthArgs,
    DestChainConfigArgs[] memory destChainConfigArgs
  ) AuthorizedCallers(priceUpdaters) {
    if (
      staticConfig.linkToken == address(0) || staticConfig.maxFeeJuelsPerMsg == 0
        || staticConfig.tokenPriceStalenessThreshold == 0
    ) {
      revert InvalidStaticConfig();
    }

    i_linkToken = staticConfig.linkToken;
    i_maxFeeJuelsPerMsg = staticConfig.maxFeeJuelsPerMsg;
    i_tokenPriceStalenessThreshold = staticConfig.tokenPriceStalenessThreshold;

    _applyFeeTokensUpdates(new address[](0), feeTokens);
    _updateTokenPriceFeeds(tokenPriceFeeds);
    _applyDestChainConfigUpdates(destChainConfigArgs);
    _applyPremiumMultiplierWeiPerEthUpdates(premiumMultiplierWeiPerEthArgs);
    _applyTokenTransferFeeConfigUpdates(tokenTransferFeeConfigArgs, new TokenTransferFeeConfigRemoveArgs[](0));
  }

  // ================================================================
  // │                     Price calculations                       │
  // ================================================================

  /// @inheritdoc IPriceRegistry
  function getTokenPrice(
    address token
  ) public view override returns (Internal.TimestampedPackedUint224 memory) {
    Internal.TimestampedPackedUint224 memory tokenPrice = s_usdPerToken[token];

    // If the token price is not stale, return it.
    if (block.timestamp - tokenPrice.timestamp < i_tokenPriceStalenessThreshold) {
      return tokenPrice;
    }

    // When we have a stale price we should check if there is a more up to date source. If not, return the stale price.
    TokenPriceFeedConfig memory priceFeedConfig = s_usdPriceFeedsPerToken[token];
    if (!priceFeedConfig.isEnabled || priceFeedConfig.dataFeedAddress == address(0)) {
      return tokenPrice;
    }

    // If the token price feed is set, retrieve the price from the feed.
    Internal.TimestampedPackedUint224 memory feedPrice = _getTokenPriceFromDataFeed(priceFeedConfig);

    // We check if the feed price isn't more stale than the stored price. Return the most recent one.
    return feedPrice.timestamp >= tokenPrice.timestamp ? feedPrice : tokenPrice;
  }

  /// @notice Get the `tokenPrice` for a given token, checks if the price is valid.
  /// @param token The token to get the price for.
  /// @return tokenPrice The tokenPrice for the given token if it exists and is valid.
  function getValidatedTokenPrice(
    address token
  ) external view returns (uint224) {
    return _getValidatedTokenPrice(token);
  }

  /// @notice Get the `tokenPrice` for an array of tokens.
  /// @param tokens The tokens to get prices for.
  /// @return tokenPrices The tokenPrices for the given tokens.
  function getTokenPrices(
    address[] calldata tokens
  ) external view returns (Internal.TimestampedPackedUint224[] memory) {
    uint256 length = tokens.length;
    Internal.TimestampedPackedUint224[] memory tokenPrices = new Internal.TimestampedPackedUint224[](length);
    for (uint256 i = 0; i < length; ++i) {
      tokenPrices[i] = getTokenPrice(tokens[i]);
    }
    return tokenPrices;
  }

  /// @notice Returns the token price data feed configuration.
  /// @param token The token to retrieve the feed config for.
  /// @return tokenPriceFeedConfig The token price data feed config (if feed address is 0, the feed config is disabled).
  function getTokenPriceFeedConfig(
    address token
  ) external view returns (TokenPriceFeedConfig memory) {
    return s_usdPriceFeedsPerToken[token];
  }

  /// @notice Get an encoded `gasPrice` for a given destination chain ID.
  /// The 224-bit result encodes necessary gas price components.
  /// - On L1 chains like Ethereum or Avax, the only component is the gas price.
  /// - On Optimistic Rollups, there are two components - the L2 gas price, and L1 base fee for data availability.
  /// - On future chains, there could be more or differing price components.
  /// PriceRegistry does not contain chain-specific logic to parse destination chain price components.
  /// @param destChainSelector The destination chain to get the price for.
  /// @return gasPrice The encoded gasPrice for the given destination chain ID.
  /// @dev Does not validate if the chain is enabled
  function getDestinationChainGasPrice(
    uint64 destChainSelector
  ) external view returns (Internal.TimestampedPackedUint224 memory) {
    return s_usdPerUnitGasByDestChainSelector[destChainSelector];
  }

  /// @notice Gets the fee token price and the gas price, both denominated in dollars.
  /// @param token The source token to get the price for.
  /// @param destChainSelector The destination chain to get the gas price for.
  /// @return tokenPrice The price of the feeToken in 1e18 dollars per base unit.
  /// @return gasPriceValue The price of gas in 1e18 dollars per base unit.
  function getTokenAndGasPrices(
    address token,
    uint64 destChainSelector
  ) external view returns (uint224 tokenPrice, uint224 gasPriceValue) {
    if (!s_destChainConfigs[destChainSelector].isEnabled) revert DestinationChainNotEnabled(destChainSelector);
    return (
      _getValidatedTokenPrice(token),
      _getValidatedGasPrice(destChainSelector, s_destChainConfigs[destChainSelector].gasPriceStalenessThreshold)
    );
  }

  /// @notice Convert a given token amount to target token amount.
  /// @dev this function assumes that no more than 1e59 dollars are sent as payment.
  /// If more is sent, the multiplication of feeTokenAmount and feeTokenValue will overflow.
  /// Since there isn't even close to 1e59 dollars in the world economy this is safe.
  /// @param fromToken The given token address.
  /// @param fromTokenAmount The given token amount.
  /// @param toToken The target token address.
  /// @return toTokenAmount The target token amount.
  function convertTokenAmount(
    address fromToken,
    uint256 fromTokenAmount,
    address toToken
  ) public view returns (uint256) {
    /// Example:
    /// fromTokenAmount:   1e18      // 1 ETH
    /// ETH:               2_000e18
    /// LINK:              5e18
    /// return:            1e18 * 2_000e18 / 5e18 = 400e18 (400 LINK)
    return (fromTokenAmount * _getValidatedTokenPrice(fromToken)) / _getValidatedTokenPrice(toToken);
  }

  /// @notice Gets the token price for a given token and reverts if the token is not supported.
  /// @param token The address of the token to get the price for.
  /// @return tokenPriceValue The token price.
  function _getValidatedTokenPrice(
    address token
  ) internal view returns (uint224) {
    Internal.TimestampedPackedUint224 memory tokenPrice = getTokenPrice(token);
    // Token price must be set at least once.
    if (tokenPrice.timestamp == 0 || tokenPrice.value == 0) revert TokenNotSupported(token);
    return tokenPrice.value;
  }

  /// @notice Gets the token price from a data feed address, rebased to the same units as s_usdPerToken.
  /// @param priceFeedConfig token data feed configuration with valid data feed address (used to retrieve price & timestamp).
  /// @return tokenPrice data feed price answer rebased to s_usdPerToken units, with latest block timestamp.
  function _getTokenPriceFromDataFeed(
    TokenPriceFeedConfig memory priceFeedConfig
  ) internal view returns (Internal.TimestampedPackedUint224 memory tokenPrice) {
    AggregatorV3Interface dataFeedContract = AggregatorV3Interface(priceFeedConfig.dataFeedAddress);
    (
      // uint80 roundID
      ,
      int256 dataFeedAnswer,
      // uint startedAt
      ,
      uint256 updatedAt,
      // uint80 answeredInRound
    ) = dataFeedContract.latestRoundData();

    if (dataFeedAnswer < 0) {
      revert DataFeedValueOutOfUint224Range();
    }
    uint224 rebasedValue =
      _calculateRebasedValue(dataFeedContract.decimals(), priceFeedConfig.tokenDecimals, uint256(dataFeedAnswer));

    // Data feed staleness is unchecked to decouple the FeeQuoter from data feed delay issues.
    return Internal.TimestampedPackedUint224({value: rebasedValue, timestamp: uint32(updatedAt)});
  }

  /// @dev Gets the fee token price and the gas price, both denominated in dollars.
  /// @param destChainSelector The destination chain to get the gas price for.
  /// @param gasPriceStalenessThreshold The amount of time a gas price can be stale before it is considered invalid.
  /// @return gasPriceValue The price of gas in 1e18 dollars per base unit.
  function _getValidatedGasPrice(
    uint64 destChainSelector,
    uint32 gasPriceStalenessThreshold
  ) private view returns (uint224 gasPriceValue) {
    Internal.TimestampedPackedUint224 memory gasPrice = s_usdPerUnitGasByDestChainSelector[destChainSelector];
    // If the staleness threshold is 0, we consider the gas price to be always valid.
    if (gasPriceStalenessThreshold != 0) {
      // We do allow a gas price of 0, but no stale or unset gas prices.
      uint256 timePassed = block.timestamp - gasPrice.timestamp;
      if (timePassed > gasPriceStalenessThreshold) {
        revert StaleGasPrice(destChainSelector, gasPriceStalenessThreshold, timePassed);
      }
    }

    return gasPrice.value;
  }

  // ================================================================
  // │                         Fee tokens                           │
  // ================================================================

  /// @inheritdoc IPriceRegistry
  function getFeeTokens() external view returns (address[] memory) {
    return s_feeTokens.values();
  }

  /// @notice Add and remove tokens from feeTokens set.
  /// @param feeTokensToRemove The addresses of the tokens which are no longer considered feeTokens.
  /// @param feeTokensToAdd The addresses of the tokens which are now considered fee tokens and can be used
  /// to calculate fees.
  function applyFeeTokensUpdates(
    address[] memory feeTokensToRemove,
    address[] memory feeTokensToAdd
  ) external onlyOwner {
    _applyFeeTokensUpdates(feeTokensToRemove, feeTokensToAdd);
  }

  /// @notice Add and remove tokens from feeTokens set.
  /// @param feeTokensToRemove The addresses of the tokens which are no longer considered feeTokens.
  /// @param feeTokensToAdd The addresses of the tokens which are now considered fee tokens.
  /// and can be used to calculate fees.
  function _applyFeeTokensUpdates(address[] memory feeTokensToRemove, address[] memory feeTokensToAdd) private {
    for (uint256 i = 0; i < feeTokensToRemove.length; ++i) {
      if (s_feeTokens.remove(feeTokensToRemove[i])) {
        emit FeeTokenRemoved(feeTokensToRemove[i]);
      }
    }
    for (uint256 i = 0; i < feeTokensToAdd.length; ++i) {
      if (s_feeTokens.add(feeTokensToAdd[i])) {
        emit FeeTokenAdded(feeTokensToAdd[i]);
      }
    }
  }

  // ================================================================
  // │                       Price updates                          │
  // ================================================================

  /// @inheritdoc IPriceRegistry
  function updatePrices(
    Internal.PriceUpdates calldata priceUpdates
  ) external override {
    // The caller must be a fee updater.
    _validateCaller();

    uint256 tokenUpdatesLength = priceUpdates.tokenPriceUpdates.length;

    for (uint256 i = 0; i < tokenUpdatesLength; ++i) {
      Internal.TokenPriceUpdate memory update = priceUpdates.tokenPriceUpdates[i];
      s_usdPerToken[update.sourceToken] =
        Internal.TimestampedPackedUint224({value: update.usdPerToken, timestamp: uint32(block.timestamp)});
      emit UsdPerTokenUpdated(update.sourceToken, update.usdPerToken, block.timestamp);
    }

    uint256 gasUpdatesLength = priceUpdates.gasPriceUpdates.length;

    for (uint256 i = 0; i < gasUpdatesLength; ++i) {
      Internal.GasPriceUpdate memory update = priceUpdates.gasPriceUpdates[i];
      s_usdPerUnitGasByDestChainSelector[update.destChainSelector] =
        Internal.TimestampedPackedUint224({value: update.usdPerUnitGas, timestamp: uint32(block.timestamp)});
      emit UsdPerUnitGasUpdated(update.destChainSelector, update.usdPerUnitGas, block.timestamp);
    }
  }

  /// @notice Updates the USD token price feeds for given tokens.
  /// @param tokenPriceFeedUpdates Token price feed updates to apply.
  function updateTokenPriceFeeds(
    TokenPriceFeedUpdate[] memory tokenPriceFeedUpdates
  ) external onlyOwner {
    _updateTokenPriceFeeds(tokenPriceFeedUpdates);
  }

  /// @notice Updates the USD token price feeds for given tokens.
  /// @param tokenPriceFeedUpdates Token price feed updates to apply.
  function _updateTokenPriceFeeds(
    TokenPriceFeedUpdate[] memory tokenPriceFeedUpdates
  ) private {
    for (uint256 i; i < tokenPriceFeedUpdates.length; ++i) {
      TokenPriceFeedUpdate memory update = tokenPriceFeedUpdates[i];
      address sourceToken = update.sourceToken;
      TokenPriceFeedConfig memory tokenPriceFeedConfig = update.feedConfig;

      s_usdPriceFeedsPerToken[sourceToken] = tokenPriceFeedConfig;
      emit PriceFeedPerTokenUpdated(sourceToken, tokenPriceFeedConfig);
    }
  }

  /// @notice Signals which version of the pool interface is supported
  function supportsInterface(
    bytes4 interfaceId
  ) public pure override returns (bool) {
    return interfaceId == type(IReceiver).interfaceId || interfaceId == type(IFeeQuoter).interfaceId
      || interfaceId == type(ITypeAndVersion).interfaceId || interfaceId == type(IERC165).interfaceId;
  }

  /// @inheritdoc IReceiver
  /// @notice Handles the report containing price feeds and updates the internal price storage.
  /// @dev This function is called to process incoming price feed data.
  /// @param metadata Arbitrary metadata associated with the report (not used in this implementation).
  /// @param report Encoded report containing an array of `ReceivedCCIPFeedReport` structs.
  function onReport(bytes calldata metadata, bytes calldata report) external {
    (bytes10 workflowName, address workflowOwner, bytes2 reportName) = metadata._extractMetadataInfo();

    _validateReportPermission(msg.sender, workflowOwner, workflowName, reportName);

    ReceivedCCIPFeedReport[] memory feeds = abi.decode(report, (ReceivedCCIPFeedReport[]));

    for (uint256 i = 0; i < feeds.length; ++i) {
      TokenPriceFeedConfig memory feedConfig = s_usdPriceFeedsPerToken[feeds[i].token];

      // If the token is not enabled we revert the entire report as that indicates some type of misconfiguration.
      if (!feedConfig.isEnabled) {
        revert TokenNotSupported(feeds[i].token);
      }
      // Keystone reports prices in USD with 18 decimals, so we passing it as 18 in the _calculateRebasedValue function.
      uint224 rebasedValue =
        _calculateRebasedValue(uint8(KEYSTONE_PRICE_DECIMALS), feedConfig.tokenDecimals, feeds[i].price);

      // If the feed timestamp is older than the current stored price, skip the update.
      // We do not revert Keystone price feeds deliberately.
      if (feeds[i].timestamp < s_usdPerToken[feeds[i].token].timestamp) {
        continue;
      }

      // Update the token price with the new value and timestamp.
      s_usdPerToken[feeds[i].token] =
        Internal.TimestampedPackedUint224({value: rebasedValue, timestamp: feeds[i].timestamp});
      emit UsdPerTokenUpdated(feeds[i].token, rebasedValue, feeds[i].timestamp);
    }
  }

  // ================================================================
  // │                       Fee quoting                            │
  // ================================================================

  /// @inheritdoc IFeeQuoter
  /// @dev The function should always validate message.extraArgs, message.receiver and family-specific configs.
  function getValidatedFee(
    uint64 destChainSelector,
    Client.EVM2AnyMessage calldata message
  ) external view returns (uint256 feeTokenAmount) {
    DestChainConfig memory destChainConfig = s_destChainConfigs[destChainSelector];
    if (!destChainConfig.isEnabled) revert DestinationChainNotEnabled(destChainSelector);
    if (!s_feeTokens.contains(message.feeToken)) revert FeeTokenNotSupported(message.feeToken);

    uint256 numberOfTokens = message.tokenAmounts.length;
    uint256 gasLimit = _validateMessageAndResolveGasLimitForDestination(destChainSelector, destChainConfig, message);

    // The below call asserts that feeToken is a supported token.
    uint224 feeTokenPrice = _getValidatedTokenPrice(message.feeToken);
    uint224 packedGasPrice = _getValidatedGasPrice(destChainSelector, destChainConfig.gasPriceStalenessThreshold);

    // Calculate premiumFee in USD with 18 decimals precision first.
    // If message-only and no token transfers, a flat network fee is charged.
    // If there are token transfers, premiumFee is calculated from token transfer fee.
    // If there are both token transfers and message, premiumFee is only calculated from token transfer fee.
    uint256 premiumFeeUSDWei = 0;
    uint32 tokenTransferGas = 0;
    uint32 tokenTransferBytesOverhead = 0;
    if (numberOfTokens > 0) {
      (premiumFeeUSDWei, tokenTransferGas, tokenTransferBytesOverhead) = _getTokenTransferCost(
        destChainConfig.defaultTokenFeeUSDCents,
        destChainConfig.defaultTokenDestGasOverhead,
        destChainSelector,
        message.feeToken,
        feeTokenPrice,
        message.tokenAmounts
      );
    } else {
      // Convert USD cents with 2 decimals to 18 decimals.
      premiumFeeUSDWei = uint256(destChainConfig.networkFeeUSDCents) * 1e16;
    }
    // Apply the premium multiplier for the fee token, making it 36 decimals
    premiumFeeUSDWei *= s_premiumMultiplierWeiPerEth[message.feeToken];

    // Calculate data availability cost in USD with 36 decimals. Data availability cost exists on rollups that need to
    // post transaction calldata onto another storage layer, e.g. Eth mainnet, incurring additional storage gas costs.
    uint256 dataAvailabilityCostUSD36Decimals = 0;

    // Only calculate data availability cost if data availability multiplier is non-zero.
    // The multiplier should be set to 0 if destination chain does not charge data availability cost.
    if (destChainConfig.destDataAvailabilityMultiplierBps > 0) {
      dataAvailabilityCostUSD36Decimals = _getDataAvailabilityCost(
        destChainConfig,
        // Parse the data availability gas price stored in the higher-order 112 bits of the encoded gas price.
        uint112(packedGasPrice >> Internal.GAS_PRICE_BITS),
        message.data.length,
        numberOfTokens,
        tokenTransferBytesOverhead
      );
    }

    // Calculate the calldata, taking into account EIP-7623. We charge destGasPerPayloadByteBase for the calldata cost
    // up to destGasPerPayloadByteThreshold, even when the total calldata length exceeds the threshold. This is safe
    // because we also charge for execution gas on top of this. When correct values are chosen, the execution gas we
    // charge is always higher than the difference between the base and high calldata costs for the first
    // destGasPerPayloadByteThreshold bytes. Since we don't pay for execution gas in EIP-7623, this execution gas is
    // effectively used to cover the higher calldata costs for the first destGasPerPayloadByteThreshold bytes.
    // The threshold should be adjusted based on expected execution cost and, potentially, to discourage large payloads.
    // Example: 16 base, 40 high, 100k execution cost. 100k/(40-16) = max 4.16kb as the threshold. Take 4kb threshold.
    // Calldata length = 5000
    // Our calculations: 1000 * 40 + 4000 * 16 = 104k calldata cost + 100k execution cost = 204k calculated cost.
    // Actual cost: 5000 * 40 = 200k
    // The difference is 4k in favour of CCIP. The lower the threshold, the more premium is charged for large payloads.
    uint256 calldataLength = message.data.length + tokenTransferBytesOverhead;
    uint256 destCallDataCost = calldataLength * destChainConfig.destGasPerPayloadByteBase;
    if (calldataLength > destChainConfig.destGasPerPayloadByteThreshold) {
      destCallDataCost = destChainConfig.destGasPerPayloadByteBase * destChainConfig.destGasPerPayloadByteThreshold
        + (calldataLength - destChainConfig.destGasPerPayloadByteThreshold) * destChainConfig.destGasPerPayloadByteHigh;
    }

    // We add the destination chain CCIP overhead (commit, exec), the token transfer gas, the calldata cost and the msg
    // gas limit to get the total gas the tx costs to execute on the destination chain.
    uint256 totalDestChainGas = destChainConfig.destGasOverhead + tokenTransferGas + destCallDataCost + gasLimit;

    // Total USD fee is in 36 decimals, feeTokenPrice is in 18 decimals USD for 1e18 smallest token denominations.
    // The result is the fee in the feeTokens smallest denominations (e.g. wei for ETH).
    // uint112(packedGasPrice) = executionGasPrice
    return (
      totalDestChainGas * uint112(packedGasPrice) * destChainConfig.gasMultiplierWeiPerEth + premiumFeeUSDWei
        + dataAvailabilityCostUSD36Decimals
    ) / feeTokenPrice;
  }

  /// @notice Sets the fee configuration for a token.
  /// @param premiumMultiplierWeiPerEthArgs Array of PremiumMultiplierWeiPerEthArgs structs.
  function applyPremiumMultiplierWeiPerEthUpdates(
    PremiumMultiplierWeiPerEthArgs[] memory premiumMultiplierWeiPerEthArgs
  ) external onlyOwner {
    _applyPremiumMultiplierWeiPerEthUpdates(premiumMultiplierWeiPerEthArgs);
  }

  /// @dev Sets the fee config.
  /// @param premiumMultiplierWeiPerEthArgs The multiplier for destination chain specific premiums.
  function _applyPremiumMultiplierWeiPerEthUpdates(
    PremiumMultiplierWeiPerEthArgs[] memory premiumMultiplierWeiPerEthArgs
  ) internal {
    for (uint256 i = 0; i < premiumMultiplierWeiPerEthArgs.length; ++i) {
      address token = premiumMultiplierWeiPerEthArgs[i].token;
      uint64 premiumMultiplierWeiPerEth = premiumMultiplierWeiPerEthArgs[i].premiumMultiplierWeiPerEth;
      s_premiumMultiplierWeiPerEth[token] = premiumMultiplierWeiPerEth;

      emit PremiumMultiplierWeiPerEthUpdated(token, premiumMultiplierWeiPerEth);
    }
  }

  /// @notice Gets the fee configuration for a token.
  /// @param token The token to get the fee configuration for.
  /// @return premiumMultiplierWeiPerEth The multiplier for destination chain specific premiums.
  function getPremiumMultiplierWeiPerEth(
    address token
  ) external view returns (uint64 premiumMultiplierWeiPerEth) {
    return s_premiumMultiplierWeiPerEth[token];
  }

  /// @notice Returns the token transfer cost parameters.
  /// A basis point fee is calculated from the USD value of each token transfer.
  /// For each individual transfer, this fee is between [minFeeUSD, maxFeeUSD].
  /// Total transfer fee is the sum of each individual token transfer fee.
  /// @dev Assumes that tokenAmounts are validated to be listed tokens elsewhere.
  /// @dev Splitting one token transfer into multiple transfers is discouraged, as it will result in a transferFee
  /// equal or greater than the same amount aggregated/de-duped.
  /// @param defaultTokenFeeUSDCents the default token fee in USD cents.
  /// @param defaultTokenDestGasOverhead the default token destination gas overhead.
  /// @param destChainSelector the destination chain selector.
  /// @param feeToken address of the feeToken.
  /// @param feeTokenPrice price of feeToken in USD with 18 decimals.
  /// @param tokenAmounts token transfers in the message.
  /// @return tokenTransferFeeUSDWei total token transfer bps fee in USD with 18 decimals.
  /// @return tokenTransferGas total execution gas of the token transfers.
  /// @return tokenTransferBytesOverhead additional token transfer data passed to destination, e.g. USDC attestation.
  function _getTokenTransferCost(
    uint256 defaultTokenFeeUSDCents,
    uint32 defaultTokenDestGasOverhead,
    uint64 destChainSelector,
    address feeToken,
    uint224 feeTokenPrice,
    Client.EVMTokenAmount[] calldata tokenAmounts
  ) internal view returns (uint256 tokenTransferFeeUSDWei, uint32 tokenTransferGas, uint32 tokenTransferBytesOverhead) {
    uint256 numberOfTokens = tokenAmounts.length;

    for (uint256 i = 0; i < numberOfTokens; ++i) {
      Client.EVMTokenAmount memory tokenAmount = tokenAmounts[i];
      TokenTransferFeeConfig memory transferFeeConfig = s_tokenTransferFeeConfig[destChainSelector][tokenAmount.token];

      // If the token has no specific overrides configured, we use the global defaults.
      if (!transferFeeConfig.isEnabled) {
        tokenTransferFeeUSDWei += defaultTokenFeeUSDCents * 1e16;
        tokenTransferGas += defaultTokenDestGasOverhead;
        tokenTransferBytesOverhead += Pool.CCIP_LOCK_OR_BURN_V1_RET_BYTES;
        continue;
      }

      uint256 bpsFeeUSDWei = 0;
      // Only calculate bps fee if ratio is greater than 0. Ratio of 0 means no bps fee for a token.
      // Useful for when the FeeQuoter cannot return a valid price for the token.
      if (transferFeeConfig.deciBps > 0) {
        uint224 tokenPrice = 0;
        if (tokenAmount.token != feeToken) {
          tokenPrice = _getValidatedTokenPrice(tokenAmount.token);
        } else {
          tokenPrice = feeTokenPrice;
        }

        // Calculate token transfer value, then apply fee ratio.
        // ratio represents multiples of 0.1bps, or 1e-5.
        bpsFeeUSDWei = (tokenPrice._calcUSDValueFromTokenAmount(tokenAmount.amount) * transferFeeConfig.deciBps) / 1e5;
      }

      tokenTransferGas += transferFeeConfig.destGasOverhead;
      tokenTransferBytesOverhead += transferFeeConfig.destBytesOverhead;

      // Bps fees should be kept within range of [minFeeUSD, maxFeeUSD].
      // Convert USD values with 2 decimals to 18 decimals.
      uint256 minFeeUSDWei = uint256(transferFeeConfig.minFeeUSDCents) * 1e16;
      if (bpsFeeUSDWei < minFeeUSDWei) {
        tokenTransferFeeUSDWei += minFeeUSDWei;
        continue;
      }

      uint256 maxFeeUSDWei = uint256(transferFeeConfig.maxFeeUSDCents) * 1e16;
      if (bpsFeeUSDWei > maxFeeUSDWei) {
        tokenTransferFeeUSDWei += maxFeeUSDWei;
        continue;
      }

      // In the case where bpsFeeUSDWei, minFeeUSDWei, and maxFeeUSDWei are all 0, we skip the fee. This is intended
      // to allow for a fee of 0 to be set.
      tokenTransferFeeUSDWei += bpsFeeUSDWei;
    }

    return (tokenTransferFeeUSDWei, tokenTransferGas, tokenTransferBytesOverhead);
  }

  /// @notice calculates the rebased value for 1e18 smallest token denomination.
  /// @param dataFeedDecimal decimal of the data feed.
  /// @param tokenDecimal decimal of the token.
  /// @param feedValue value of the data feed.
  /// @return rebasedValue rebased value.
  function _calculateRebasedValue(
    uint8 dataFeedDecimal,
    uint8 tokenDecimal,
    uint256 feedValue
  ) internal pure returns (uint224 rebasedValue) {
    // Rebase formula for units in smallest token denomination: usdValue * (1e18 * 1e18) / 1eTokenDecimals.
    // feedValue * (10 ** (18 - feedDecimals)) * (10 ** (18 - erc20Decimals))
    // feedValue * (10 ** ((18 - feedDecimals) + (18 - erc20Decimals)))
    // feedValue * (10 ** (36 - feedDecimals - erc20Decimals))
    // feedValue * (10 ** (36 - (feedDecimals + erc20Decimals)))
    // feedValue * (10 ** (36 - excessDecimals))
    // If excessDecimals > 36 => flip it to feedValue / (10 ** (excessDecimals - 36)).
    uint8 excessDecimals = dataFeedDecimal + tokenDecimal;
    uint256 rebasedVal;

    if (excessDecimals > FEE_BASE_DECIMALS) {
      rebasedVal = feedValue / (10 ** (excessDecimals - FEE_BASE_DECIMALS));
    } else {
      rebasedVal = feedValue * (10 ** (FEE_BASE_DECIMALS - excessDecimals));
    }

    if (rebasedVal > type(uint224).max) {
      revert DataFeedValueOutOfUint224Range();
    }

    return uint224(rebasedVal);
  }

  /// @notice Returns the estimated data availability cost of the message.
  /// @dev To save on gas, we use a single destGasPerDataAvailabilityByte value for both zero and non-zero bytes.
  /// @param destChainConfig the config configured for the destination chain selector.
  /// @param dataAvailabilityGasPrice USD per data availability gas in 18 decimals.
  /// @param messageDataLength length of the data field in the message.
  /// @param numberOfTokens number of distinct token transfers in the message.
  /// @param tokenTransferBytesOverhead additional token transfer data passed to destination, e.g. USDC attestation.
  /// @return dataAvailabilityCostUSD36Decimal total data availability cost in USD with 36 decimals.
  function _getDataAvailabilityCost(
    DestChainConfig memory destChainConfig,
    uint112 dataAvailabilityGasPrice,
    uint256 messageDataLength,
    uint256 numberOfTokens,
    uint32 tokenTransferBytesOverhead
  ) internal pure returns (uint256 dataAvailabilityCostUSD36Decimal) {
    // dataAvailabilityLengthBytes sums up byte lengths of fixed message fields and dynamic message fields.
    // Fixed message fields do account for the offset and length slot of the dynamic fields.
    uint256 dataAvailabilityLengthBytes = Internal.MESSAGE_FIXED_BYTES + messageDataLength
      + (numberOfTokens * Internal.MESSAGE_FIXED_BYTES_PER_TOKEN) + tokenTransferBytesOverhead;

    // destDataAvailabilityOverheadGas is a separate config value for flexibility to be updated independently of message
    // cost. Its value is determined by CCIP lane implementation, e.g. the overhead data posted for OCR.
    uint256 dataAvailabilityGas = (dataAvailabilityLengthBytes * destChainConfig.destGasPerDataAvailabilityByte)
      + destChainConfig.destDataAvailabilityOverheadGas;

    // dataAvailabilityGasPrice is in 18 decimals, destDataAvailabilityMultiplierBps is in 4 decimals.
    // We pad 14 decimals to bring the result to 36 decimals, in line with token bps and execution fee.
    return ((dataAvailabilityGas * dataAvailabilityGasPrice) * destChainConfig.destDataAvailabilityMultiplierBps) * 1e14;
  }

  /// @notice Gets the transfer fee config for a given token.
  /// @param destChainSelector The destination chain selector.
  /// @param token The token address.
  /// @return tokenTransferFeeConfig The transfer fee config for the token.
  function getTokenTransferFeeConfig(
    uint64 destChainSelector,
    address token
  ) external view returns (TokenTransferFeeConfig memory tokenTransferFeeConfig) {
    return s_tokenTransferFeeConfig[destChainSelector][token];
  }

  /// @notice Sets the transfer fee config.
  /// @dev only callable by the owner or admin.
  function applyTokenTransferFeeConfigUpdates(
    TokenTransferFeeConfigArgs[] memory tokenTransferFeeConfigArgs,
    TokenTransferFeeConfigRemoveArgs[] memory tokensToUseDefaultFeeConfigs
  ) external onlyOwner {
    _applyTokenTransferFeeConfigUpdates(tokenTransferFeeConfigArgs, tokensToUseDefaultFeeConfigs);
  }

  /// @notice internal helper to set the token transfer fee config.
  function _applyTokenTransferFeeConfigUpdates(
    TokenTransferFeeConfigArgs[] memory tokenTransferFeeConfigArgs,
    TokenTransferFeeConfigRemoveArgs[] memory tokensToUseDefaultFeeConfigs
  ) internal {
    for (uint256 i = 0; i < tokenTransferFeeConfigArgs.length; ++i) {
      TokenTransferFeeConfigArgs memory tokenTransferFeeConfigArg = tokenTransferFeeConfigArgs[i];
      uint64 destChainSelector = tokenTransferFeeConfigArg.destChainSelector;

      for (uint256 j = 0; j < tokenTransferFeeConfigArg.tokenTransferFeeConfigs.length; ++j) {
        TokenTransferFeeConfig memory tokenTransferFeeConfig =
          tokenTransferFeeConfigArg.tokenTransferFeeConfigs[j].tokenTransferFeeConfig;
        address token = tokenTransferFeeConfigArg.tokenTransferFeeConfigs[j].token;

        if (tokenTransferFeeConfig.minFeeUSDCents >= tokenTransferFeeConfig.maxFeeUSDCents) {
          revert InvalidFeeRange(tokenTransferFeeConfig.minFeeUSDCents, tokenTransferFeeConfig.maxFeeUSDCents);
        }

        if (tokenTransferFeeConfig.destBytesOverhead < Pool.CCIP_LOCK_OR_BURN_V1_RET_BYTES) {
          revert InvalidDestBytesOverhead(token, tokenTransferFeeConfig.destBytesOverhead);
        }

        s_tokenTransferFeeConfig[destChainSelector][token] = tokenTransferFeeConfig;

        emit TokenTransferFeeConfigUpdated(destChainSelector, token, tokenTransferFeeConfig);
      }
    }

    // Remove the custom fee configs for the tokens that are in the tokensToUseDefaultFeeConfigs array.
    for (uint256 i = 0; i < tokensToUseDefaultFeeConfigs.length; ++i) {
      uint64 destChainSelector = tokensToUseDefaultFeeConfigs[i].destChainSelector;
      address token = tokensToUseDefaultFeeConfigs[i].token;
      delete s_tokenTransferFeeConfig[destChainSelector][token];
      emit TokenTransferFeeConfigDeleted(destChainSelector, token);
    }
  }

  // ================================================================
  // │             Validations & message processing                 │
  // ================================================================

  /// @notice Validates that the destAddress matches the expected format of the family.
  /// @param chainFamilySelector Tag to identify the target family.
  /// @param destAddress Dest address to validate.
  /// @dev precondition - assumes the family tag is correct and validated.
  function _validateDestFamilyAddress(
    bytes4 chainFamilySelector,
    bytes memory destAddress,
    uint256 gasLimit
  ) internal pure {
    if (chainFamilySelector == Internal.CHAIN_FAMILY_SELECTOR_EVM) {
      return Internal._validateEVMAddress(destAddress);
    }
    if (chainFamilySelector == Internal.CHAIN_FAMILY_SELECTOR_SVM) {
      // SVM addresses don't have a precompile space at the first X addresses, instead we validate that if the gasLimit
      // is non-zero, the address must not be 0x0.
      return Internal._validate32ByteAddress(destAddress, gasLimit > 0 ? 1 : 0);
    }
    if (
      chainFamilySelector == Internal.CHAIN_FAMILY_SELECTOR_APTOS
        || chainFamilySelector == Internal.CHAIN_FAMILY_SELECTOR_SUI
    ) {
      return Internal._validate32ByteAddress(destAddress, Internal.APTOS_PRECOMPILE_SPACE);
    }
    revert InvalidChainFamilySelector(chainFamilySelector);
  }

  /// @notice Parse and validate the SVM specific Extra Args Bytes.
  function _parseSVMExtraArgsFromBytes(
    bytes calldata extraArgs,
    uint256 maxPerMsgGasLimit,
    bool enforceOutOfOrder
  ) internal pure returns (Client.SVMExtraArgsV1 memory svmExtraArgs) {
    if (extraArgs.length == 0) {
      revert InvalidExtraArgsData();
    }

    bytes4 tag = bytes4(extraArgs[:4]);
    if (tag != Client.SVM_EXTRA_ARGS_V1_TAG) {
      revert InvalidExtraArgsTag();
    }

    svmExtraArgs = abi.decode(extraArgs[4:], (Client.SVMExtraArgsV1));

    if (enforceOutOfOrder && !svmExtraArgs.allowOutOfOrderExecution) {
      revert ExtraArgOutOfOrderExecutionMustBeTrue();
    }

    if (svmExtraArgs.computeUnits > maxPerMsgGasLimit) {
      revert MessageComputeUnitLimitTooHigh();
    }

    return svmExtraArgs;
  }

  /// @dev Convert the extra args bytes into a struct with validations against the dest chain config.
  /// @param extraArgs The extra args bytes.
  /// @return genericExtraArgs The GenericExtraArgs struct.
  function _parseGenericExtraArgsFromBytes(
    bytes calldata extraArgs,
    uint32 defaultTxGasLimit,
    uint256 maxPerMsgGasLimit,
    bool enforceOutOfOrder
  ) internal pure returns (Client.GenericExtraArgsV2 memory) {
    // Since GenericExtraArgs are simply a superset of EVMExtraArgsV1, we can parse them as such. For Aptos, this
    // technically means EVMExtraArgsV1 are processed like they would be valid, but they will always fail on the
    // allowedOutOfOrderExecution check below.
    Client.GenericExtraArgsV2 memory parsedExtraArgs =
      _parseUnvalidatedEVMExtraArgsFromBytes(extraArgs, defaultTxGasLimit);

    if (parsedExtraArgs.gasLimit > maxPerMsgGasLimit) revert MessageGasLimitTooHigh();

    // If the chain enforces out of order execution, the extra args must allow it, otherwise revert. We cannot assume
    // the user intended to use OOO on any chain that requires it as it may lead to unexpected behavior. Therefore we
    // revert instead of assuming the user intended to use OOO.
    if (enforceOutOfOrder && !parsedExtraArgs.allowOutOfOrderExecution) {
      revert ExtraArgOutOfOrderExecutionMustBeTrue();
    }

    return parsedExtraArgs;
  }

  /// @dev Convert the extra args bytes into a struct.
  /// @param extraArgs The extra args bytes.
  /// @param defaultTxGasLimit default tx gas limit to use in the absence of extra args.
  /// @return EVMExtraArgsV2 the extra args struct populated with either the given args or default values.
  function _parseUnvalidatedEVMExtraArgsFromBytes(
    bytes calldata extraArgs,
    uint64 defaultTxGasLimit
  ) private pure returns (Client.GenericExtraArgsV2 memory) {
    if (extraArgs.length == 0) {
      // If extra args are empty, generate default values.
      return Client.GenericExtraArgsV2({gasLimit: defaultTxGasLimit, allowOutOfOrderExecution: false});
    }

    bytes4 extraArgsTag = bytes4(extraArgs);
    bytes memory argsData = extraArgs[4:];

    if (extraArgsTag == Client.GENERIC_EXTRA_ARGS_V2_TAG) {
      return abi.decode(argsData, (Client.GenericExtraArgsV2));
    } else if (extraArgsTag == Client.EVM_EXTRA_ARGS_V1_TAG) {
      // EVMExtraArgsV1 originally included a second boolean (strict) field which has been deprecated.
      // Clients may still include it but it will be ignored.
      return Client.GenericExtraArgsV2({gasLimit: abi.decode(argsData, (uint256)), allowOutOfOrderExecution: false});
    }
    revert InvalidExtraArgsTag();
  }

  /// @notice Validate the forwarded message to ensure it matches the configuration limits (message length, number of
  /// tokens) and family-specific expectations (address format).
  /// @param destChainSelector The destination chain selector.
  /// @param destChainConfig The destination chain config.
  /// @param message The message to validate.
  /// @return gasLimit The gas limit to use for the message.
  function _validateMessageAndResolveGasLimitForDestination(
    uint64 destChainSelector,
    DestChainConfig memory destChainConfig,
    Client.EVM2AnyMessage calldata message
  ) internal view returns (uint256 gasLimit) {
    uint256 dataLength = message.data.length;
    uint256 numberOfTokens = message.tokenAmounts.length;

    // Check that payload is formed correctly.
    if (dataLength > uint256(destChainConfig.maxDataBytes)) {
      revert MessageTooLarge(uint256(destChainConfig.maxDataBytes), dataLength);
    }
    if (numberOfTokens > uint256(destChainConfig.maxNumberOfTokensPerMsg)) {
      revert UnsupportedNumberOfTokens(numberOfTokens, destChainConfig.maxNumberOfTokensPerMsg);
    }

    // resolve gas limit and validate chainFamilySelector
    if (
      destChainConfig.chainFamilySelector == Internal.CHAIN_FAMILY_SELECTOR_EVM
        || destChainConfig.chainFamilySelector == Internal.CHAIN_FAMILY_SELECTOR_APTOS
        || destChainConfig.chainFamilySelector == Internal.CHAIN_FAMILY_SELECTOR_SUI
    ) {
      gasLimit = _parseGenericExtraArgsFromBytes(
        message.extraArgs,
        destChainConfig.defaultTxGasLimit,
        destChainConfig.maxPerMsgGasLimit,
        destChainConfig.enforceOutOfOrder
      ).gasLimit;

      _validateDestFamilyAddress(destChainConfig.chainFamilySelector, message.receiver, gasLimit);
    } else if (destChainConfig.chainFamilySelector == Internal.CHAIN_FAMILY_SELECTOR_SVM) {
      Client.SVMExtraArgsV1 memory svmExtraArgsV1 = _parseSVMExtraArgsFromBytes(
        message.extraArgs, destChainConfig.maxPerMsgGasLimit, destChainConfig.enforceOutOfOrder
      );

      gasLimit = svmExtraArgsV1.computeUnits;

      _validateDestFamilyAddress(destChainConfig.chainFamilySelector, message.receiver, gasLimit);

      uint256 accountsLength = svmExtraArgsV1.accounts.length;
      // The max payload size for SVM is heavily dependent on the accounts passed into extra args and the number of
      // tokens. Below, token and account overhead will count towards maxDataBytes.
      uint256 svmExpandedDataLength = dataLength;

      // This abi.decode is safe because the address is validated above.
      if (abi.decode(message.receiver, (uint256)) == 0) {
        // When message receiver is zero, CCIP receiver is not invoked on SVM.
        // There should not be additional accounts specified for the receiver.
        if (accountsLength > 0) {
          revert TooManySVMExtraArgsAccounts(accountsLength, 0);
        }
      } else {
        // The messaging accounts needed for CCIP receiver on SVM are:
        // message receiver, offramp PDA signer,
        // plus remaining accounts specified in SVM extraArgs. Each account is 32 bytes.
        svmExpandedDataLength +=
          ((accountsLength + Client.SVM_MESSAGING_ACCOUNTS_OVERHEAD) * Client.SVM_ACCOUNT_BYTE_SIZE);
      }

      if (numberOfTokens > 0 && svmExtraArgsV1.tokenReceiver == bytes32(0)) {
        revert InvalidTokenReceiver();
      }
      if (accountsLength > Client.SVM_EXTRA_ARGS_MAX_ACCOUNTS) {
        revert TooManySVMExtraArgsAccounts(accountsLength, Client.SVM_EXTRA_ARGS_MAX_ACCOUNTS);
      }
      if (svmExtraArgsV1.accountIsWritableBitmap >> accountsLength != 0) {
        revert InvalidSVMExtraArgsWritableBitmap(svmExtraArgsV1.accountIsWritableBitmap, accountsLength);
      }

      svmExpandedDataLength += (numberOfTokens * Client.SVM_TOKEN_TRANSFER_DATA_OVERHEAD);

      // The token destBytesOverhead can be very different per token so we have to take it into account as well.
      for (uint256 i = 0; i < numberOfTokens; ++i) {
        uint256 destBytesOverhead =
          s_tokenTransferFeeConfig[destChainSelector][message.tokenAmounts[i].token].destBytesOverhead;

        // Pools get Pool.CCIP_LOCK_OR_BURN_V1_RET_BYTES by default, but if an override is set we use that instead.
        if (destBytesOverhead > 0) {
          svmExpandedDataLength += destBytesOverhead;
        } else {
          svmExpandedDataLength += Pool.CCIP_LOCK_OR_BURN_V1_RET_BYTES;
        }
      }

      if (svmExpandedDataLength > uint256(destChainConfig.maxDataBytes)) {
        revert MessageTooLarge(uint256(destChainConfig.maxDataBytes), svmExpandedDataLength);
      }
    } else {
      revert InvalidChainFamilySelector(destChainConfig.chainFamilySelector);
    }

    return gasLimit;
  }

  /// @inheritdoc IFeeQuoter
  /// @dev precondition - onRampTokenTransfers and sourceTokenAmounts lengths must be equal.
  function processMessageArgs(
    uint64 destChainSelector,
    address feeToken,
    uint256 feeTokenAmount,
    bytes calldata extraArgs,
    bytes calldata messageReceiver
  )
    external
    view
    returns (
      uint256 msgFeeJuels,
      bool isOutOfOrderExecution,
      bytes memory convertedExtraArgs,
      bytes memory tokenReceiver
    )
  {
    // Convert feeToken to link if not already in link.
    if (feeToken == i_linkToken) {
      msgFeeJuels = feeTokenAmount;
    } else {
      msgFeeJuels = convertTokenAmount(feeToken, feeTokenAmount, i_linkToken);
    }

    if (msgFeeJuels > i_maxFeeJuelsPerMsg) revert MessageFeeTooHigh(msgFeeJuels, i_maxFeeJuelsPerMsg);

    (convertedExtraArgs, isOutOfOrderExecution, tokenReceiver) =
      _processChainFamilySelector(destChainSelector, messageReceiver, extraArgs);

    return (msgFeeJuels, isOutOfOrderExecution, convertedExtraArgs, tokenReceiver);
  }

  /// @notice Parses the extra Args based on the chain family selector. Isolated into a separate function
  /// as it was the only way to prevent a stack too deep error, and makes future chain family additions easier.
  // solhint-disable-next-line chainlink-solidity/explicit-returns
  function _processChainFamilySelector(
    uint64 destChainSelector,
    bytes calldata messageReceiver,
    bytes calldata extraArgs
  ) internal view returns (bytes memory validatedExtraArgs, bool allowOutOfOrderExecution, bytes memory tokenReceiver) {
    // Since this function is called after getFee, which already validates the params, no validation is necessary.
    DestChainConfig memory destChainConfig = s_destChainConfigs[destChainSelector];
    // EVM and Aptos both use the same GenericExtraArgs, with EVM also supporting EVMExtraArgsV1 which is handled inside
    // the generic function.
    if (
      destChainConfig.chainFamilySelector == Internal.CHAIN_FAMILY_SELECTOR_EVM
        || destChainConfig.chainFamilySelector == Internal.CHAIN_FAMILY_SELECTOR_APTOS
        || destChainConfig.chainFamilySelector == Internal.CHAIN_FAMILY_SELECTOR_SUI
    ) {
      Client.GenericExtraArgsV2 memory parsedExtraArgs =
        _parseUnvalidatedEVMExtraArgsFromBytes(extraArgs, destChainConfig.defaultTxGasLimit);

      return (Client._argsToBytes(parsedExtraArgs), parsedExtraArgs.allowOutOfOrderExecution, messageReceiver);
    }
    if (destChainConfig.chainFamilySelector == Internal.CHAIN_FAMILY_SELECTOR_SVM) {
      // If extraArgs passes the parsing it's valid and can be returned unchanged.
      // ExtraArgs are required on SVM, meaning the supplied extraArgs are either invalid and we would have reverted
      // or we have valid extraArgs and we can return them without having to re-encode them.
      return (
        extraArgs,
        true,
        abi.encode(
          _parseSVMExtraArgsFromBytes(extraArgs, destChainConfig.maxPerMsgGasLimit, destChainConfig.enforceOutOfOrder)
            .tokenReceiver
        )
      );
    }
    revert InvalidChainFamilySelector(destChainConfig.chainFamilySelector);
  }

  /// @inheritdoc IFeeQuoter
  function processPoolReturnData(
    uint64 destChainSelector,
    Internal.EVM2AnyTokenTransfer[] calldata onRampTokenTransfers,
    Client.EVMTokenAmount[] calldata sourceTokenAmounts
  ) external view returns (bytes[] memory destExecDataPerToken) {
    bytes4 chainFamilySelector = s_destChainConfigs[destChainSelector].chainFamilySelector;
    destExecDataPerToken = new bytes[](onRampTokenTransfers.length);
    for (uint256 i = 0; i < onRampTokenTransfers.length; ++i) {
      address sourceToken = sourceTokenAmounts[i].token;

      // Since the DON has to pay for the extraData to be included on the destination chain, we cap the length of the
      // extraData. This prevents gas bomb attacks on the NOPs. As destBytesOverhead accounts for both.
      // extraData and offchainData, this caps the worst case abuse to the number of bytes reserved for offchainData.
      uint256 destPoolDataLength = onRampTokenTransfers[i].extraData.length;
      if (destPoolDataLength > Pool.CCIP_LOCK_OR_BURN_V1_RET_BYTES) {
        if (destPoolDataLength > s_tokenTransferFeeConfig[destChainSelector][sourceToken].destBytesOverhead) {
          revert SourceTokenDataTooLarge(sourceToken);
        }
      }

      // We pass '1' here so that SVM validation requires a non-zero token address.
      // The 'gasLimit' parameter isn't actually used for gas in this context; it simply
      // signals that the address must not be zero on SVM.
      _validateDestFamilyAddress(chainFamilySelector, onRampTokenTransfers[i].destTokenAddress, 1);
      FeeQuoter.TokenTransferFeeConfig memory tokenTransferFeeConfig =
        s_tokenTransferFeeConfig[destChainSelector][sourceToken];

      uint32 destGasAmount = tokenTransferFeeConfig.isEnabled
        ? tokenTransferFeeConfig.destGasOverhead
        : s_destChainConfigs[destChainSelector].defaultTokenDestGasOverhead;

      // The user will be billed either the default or the override, so we send the exact amount that we billed for
      // to the destination chain to be used for the token releaseOrMint and transfer.
      destExecDataPerToken[i] = abi.encode(destGasAmount);
    }
    return destExecDataPerToken;
  }

  // ================================================================
  // │                           Configs                            │
  // ================================================================

  /// @notice Returns the configured config for the dest chain selector.
  /// @param destChainSelector Destination chain selector to fetch config for.
  /// @return destChainConfig Config for the destination chain.
  function getDestChainConfig(
    uint64 destChainSelector
  ) external view returns (DestChainConfig memory) {
    return s_destChainConfigs[destChainSelector];
  }

  /// @notice Updates the destination chain specific config.
  /// @param destChainConfigArgs Array of source chain specific configs.
  function applyDestChainConfigUpdates(
    DestChainConfigArgs[] memory destChainConfigArgs
  ) external onlyOwner {
    _applyDestChainConfigUpdates(destChainConfigArgs);
  }

  /// @notice Internal version of applyDestChainConfigUpdates.
  function _applyDestChainConfigUpdates(
    DestChainConfigArgs[] memory destChainConfigArgs
  ) internal {
    for (uint256 i = 0; i < destChainConfigArgs.length; ++i) {
      DestChainConfigArgs memory destChainConfigArg = destChainConfigArgs[i];
      uint64 destChainSelector = destChainConfigArgs[i].destChainSelector;
      DestChainConfig memory destChainConfig = destChainConfigArg.destChainConfig;

      // destChainSelector must be non-zero, defaultTxGasLimit must be set, must be less than maxPerMsgGasLimit
      if (
        destChainSelector == 0 || destChainConfig.defaultTxGasLimit == 0
          || destChainConfig.defaultTxGasLimit > destChainConfig.maxPerMsgGasLimit
          || (
            destChainConfig.chainFamilySelector != Internal.CHAIN_FAMILY_SELECTOR_EVM
              && destChainConfig.chainFamilySelector != Internal.CHAIN_FAMILY_SELECTOR_SVM
              && destChainConfig.chainFamilySelector != Internal.CHAIN_FAMILY_SELECTOR_APTOS
              && destChainConfig.chainFamilySelector != Internal.CHAIN_FAMILY_SELECTOR_SUI
          )
      ) {
        revert InvalidDestChainConfig(destChainSelector);
      }

      // If the chain family selector is zero, it indicates that the chain was never configured and we
      // are adding a new chain.
      if (s_destChainConfigs[destChainSelector].chainFamilySelector == 0) {
        emit DestChainAdded(destChainSelector, destChainConfig);
      } else {
        emit DestChainConfigUpdated(destChainSelector, destChainConfig);
      }

      s_destChainConfigs[destChainSelector] = destChainConfig;
    }
  }

  /// @notice Returns the static FeeQuoter config.
  /// @dev RMN depends on this function, if updated, please notify the RMN maintainers.
  /// @return staticConfig The static configuration.
  function getStaticConfig() external view returns (StaticConfig memory) {
    return StaticConfig({
      maxFeeJuelsPerMsg: i_maxFeeJuelsPerMsg,
      linkToken: i_linkToken,
      tokenPriceStalenessThreshold: i_tokenPriceStalenessThreshold
    });
  }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

import {Client} from "../libraries/Client.sol";
import {Internal} from "../libraries/Internal.sol";
import {IPriceRegistry} from "./IPriceRegistry.sol";

interface IFeeQuoter is IPriceRegistry {
  /// @notice Validates the ccip message & returns the fee.
  /// @param destChainSelector The destination chain selector.
  /// @param message The message to get quote for.
  /// @return feeTokenAmount The amount of fee token needed for the fee, in smallest denomination of the fee token.
  function getValidatedFee(
    uint64 destChainSelector,
    Client.EVM2AnyMessage calldata message
  ) external view returns (uint256 feeTokenAmount);

  /// @notice Converts the extraArgs to the latest version and returns the converted message fee in juels.
  /// @notice Validates pool return data.
  /// @param destChainSelector destination chain selector to process, must be a configured valid chain.
  /// @param feeToken token address used to pay for message fees, must be a configured valid fee token.
  /// @param feeTokenAmount Fee token amount.
  /// @param extraArgs Message extra args that were passed in by the client.
  /// @param messageReceiver Message receiver address in bytes from EVM2AnyMessage.receiver
  /// @return msgFeeJuels message fee in juels.
  /// @return isOutOfOrderExecution true if the message should be executed out of order.
  /// @return convertedExtraArgs extra args converted to the latest family-specific args version.
  /// @return tokenReceiver token receiver address in bytes on destination chain
  function processMessageArgs(
    uint64 destChainSelector,
    address feeToken,
    uint256 feeTokenAmount,
    bytes calldata extraArgs,
    bytes calldata messageReceiver
  )
    external
    view
    returns (
      uint256 msgFeeJuels,
      bool isOutOfOrderExecution,
      bytes memory convertedExtraArgs,
      bytes memory tokenReceiver
    );

  /// @notice Validates pool return data.
  /// @param destChainSelector Destination chain selector to which the token amounts are sent to.
  /// @param onRampTokenTransfers Token amounts with populated pool return data.
  /// @param sourceTokenAmounts Token amounts originally sent in a Client.EVM2AnyMessage message.
  /// @return destExecDataPerToken Destination chain execution data.
  function processPoolReturnData(
    uint64 destChainSelector,
    Internal.EVM2AnyTokenTransfer[] calldata onRampTokenTransfers,
    Client.EVMTokenAmount[] calldata sourceTokenAmounts
  ) external view returns (bytes[] memory destExecDataPerToken);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

import {Internal} from "../libraries/Internal.sol";

interface IPriceRegistry {
  /// @notice Update the price for given tokens and gas prices for given chains.
  /// @param priceUpdates The price updates to apply.
  function updatePrices(
    Internal.PriceUpdates memory priceUpdates
  ) external;

  /// @notice Get the `tokenPrice` for a given token.
  /// @param token The token to get the price for.
  /// @return tokenPrice The tokenPrice for the given token.
  function getTokenPrice(
    address token
  ) external view returns (Internal.TimestampedPackedUint224 memory);

  /// @notice Get the `tokenPrice` for a given token, checks if the price is valid.
  /// @param token The token to get the price for.
  /// @return tokenPrice The tokenPrice for the given token if it exists and is valid.
  function getValidatedTokenPrice(
    address token
  ) external view returns (uint224);

  /// @notice Get the `tokenPrice` for an array of tokens.
  /// @param tokens The tokens to get prices for.
  /// @return tokenPrices The tokenPrices for the given tokens.
  function getTokenPrices(
    address[] calldata tokens
  ) external view returns (Internal.TimestampedPackedUint224[] memory);

  /// @notice Get an encoded `gasPrice` for a given destination chain ID.
  /// The 224-bit result encodes necessary gas price components.
  /// On L1 chains like Ethereum or Avax, the only component is the gas price.
  /// On Optimistic Rollups, there are two components - the L2 gas price, and L1 base fee for data availability.
  /// On future chains, there could be more or differing price components.
  /// PriceRegistry does not contain chain-specific logic to parse destination chain price components.
  /// @param destChainSelector The destination chain to get the price for.
  /// @return gasPrice The encoded gasPrice for the given destination chain ID.
  function getDestinationChainGasPrice(
    uint64 destChainSelector
  ) external view returns (Internal.TimestampedPackedUint224 memory);

  /// @notice Gets the fee token price and the gas price, both denominated in dollars.
  /// @param token The source token to get the price for.
  /// @param destChainSelector The destination chain to get the gas price for.
  /// @return tokenPrice The price of the feeToken in 1e18 dollars per base unit.
  /// @return gasPrice The price of gas in 1e18 dollars per base unit.
  function getTokenAndGasPrices(
    address token,
    uint64 destChainSelector
  ) external view returns (uint224 tokenPrice, uint224 gasPrice);

  /// @notice Convert a given token amount to target token amount.
  /// @param fromToken The given token address.
  /// @param fromTokenAmount The given token amount.
  /// @param toToken The target token address.
  /// @return toTokenAmount The target token amount.
  function convertTokenAmount(
    address fromToken,
    uint256 fromTokenAmount,
    address toToken
  ) external view returns (uint256 toTokenAmount);

  /// @notice Get the list of fee tokens.
  /// @return feeTokens The tokens set as fee tokens.
  function getFeeTokens() external view returns (address[] memory);
}

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

// End consumer library.
library Client {
  /// @dev RMN depends on this struct, if changing, please notify the RMN maintainers.
  struct EVMTokenAmount {
    address token; // token address on the local chain.
    uint256 amount; // Amount of tokens.
  }

  struct Any2EVMMessage {
    bytes32 messageId; // MessageId corresponding to ccipSend on source.
    uint64 sourceChainSelector; // Source chain selector.
    bytes sender; // abi.decode(sender) if coming from an EVM chain.
    bytes data; // payload sent in original message.
    EVMTokenAmount[] destTokenAmounts; // Tokens and their amounts in their destination chain representation.
  }

  // If extraArgs is empty bytes, the default is 200k gas limit.
  struct EVM2AnyMessage {
    bytes receiver; // abi.encode(receiver address) for dest EVM chains.
    bytes data; // Data payload.
    EVMTokenAmount[] tokenAmounts; // Token transfers.
    address feeToken; // Address of feeToken. address(0) means you will send msg.value.
    bytes extraArgs; // Populate this with _argsToBytes(EVMExtraArgsV2).
  }

  // Tag to indicate only a gas limit. Only usable for EVM as destination chain.
  bytes4 public constant EVM_EXTRA_ARGS_V1_TAG = 0x97a657c9;

  struct EVMExtraArgsV1 {
    uint256 gasLimit;
  }

  function _argsToBytes(
    EVMExtraArgsV1 memory extraArgs
  ) internal pure returns (bytes memory bts) {
    return abi.encodeWithSelector(EVM_EXTRA_ARGS_V1_TAG, extraArgs);
  }

  // Tag to indicate a gas limit (or dest chain equivalent processing units) and Out Of Order Execution. This tag is
  // available for multiple chain families. If there is no chain family specific tag, this is the default available
  // for a chain.
  // Note: not available for Solana VM based chains.
  bytes4 public constant GENERIC_EXTRA_ARGS_V2_TAG = 0x181dcf10;

  /// @param gasLimit: gas limit for the callback on the destination chain.
  /// @param allowOutOfOrderExecution: if true, it indicates that the message can be executed in any order relative to
  /// other messages from the same sender. This value's default varies by chain. On some chains, a particular value is
  /// enforced, meaning if the expected value is not set, the message request will revert.
  /// @dev Fully compatible with the previously existing EVMExtraArgsV2.
  struct GenericExtraArgsV2 {
    uint256 gasLimit;
    bool allowOutOfOrderExecution;
  }

  // Extra args tag for chains that use the Solana VM.
  bytes4 public constant SVM_EXTRA_ARGS_V1_TAG = 0x1f3b3aba;

  struct SVMExtraArgsV1 {
    uint32 computeUnits;
    uint64 accountIsWritableBitmap;
    bool allowOutOfOrderExecution;
    bytes32 tokenReceiver;
    // Additional accounts needed for execution of CCIP receiver. Must be empty if message.receiver is zero.
    // Token transfer related accounts are specified in the token pool lookup table on SVM.
    bytes32[] accounts;
  }

  /// @dev The maximum number of accounts that can be passed in SVMExtraArgs.
  uint256 public constant SVM_EXTRA_ARGS_MAX_ACCOUNTS = 64;

  /// @dev The expected static payload size of a token transfer when Borsh encoded and submitted to SVM.
  /// TokenPool extra data and offchain data sizes are dynamic, and should be accounted for separately.
  uint256 public constant SVM_TOKEN_TRANSFER_DATA_OVERHEAD = (4 + 32) // source_pool
    + 32 // token_address
    + 4 // gas_amount
    + 4 // extra_data overhead
    + 32 // amount
    + 32 // size of the token lookup table account
    + 32 // token-related accounts in the lookup table, over-estimated to 32, typically between 11 - 13
    + 32 // token account belonging to the token receiver, e.g ATA, not included in the token lookup table
    + 32 // per-chain token pool config, not included in the token lookup table
    + 32 // per-chain token billing config, not always included in the token lookup table
    + 32; // OffRamp pool signer PDA, not included in the token lookup table

  /// @dev Number of overhead accounts needed for message execution on SVM.
  /// @dev These are message.receiver, and the OffRamp Signer PDA specific to the receiver.
  uint256 public constant SVM_MESSAGING_ACCOUNTS_OVERHEAD = 2;

  /// @dev The size of each SVM account address in bytes.
  uint256 public constant SVM_ACCOUNT_BYTE_SIZE = 32;

  function _argsToBytes(
    GenericExtraArgsV2 memory extraArgs
  ) internal pure returns (bytes memory bts) {
    return abi.encodeWithSelector(GENERIC_EXTRA_ARGS_V2_TAG, extraArgs);
  }

  function _svmArgsToBytes(
    SVMExtraArgsV1 memory extraArgs
  ) internal pure returns (bytes memory bts) {
    return abi.encodeWithSelector(SVM_EXTRA_ARGS_V1_TAG, extraArgs);
  }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

import {MerkleMultiProof} from "../libraries/MerkleMultiProof.sol";

/// @notice Library for CCIP internal definitions common to multiple contracts.
/// @dev The following is a non-exhaustive list of "known issues" for CCIP:
/// - We could implement yield claiming for Blast. This is not worth the custom code path on non-blast chains.
/// - uint32 is used for timestamps, which will overflow in 2106. This is not a concern for the current use case, as we
/// expect to have migrated to a new version by then.
library Internal {
  error InvalidEVMAddress(bytes encodedAddress);
  error Invalid32ByteAddress(bytes encodedAddress);

  /// @dev We limit return data to a selector plus 4 words. This is to avoid malicious contracts from returning
  /// large amounts of data and causing repeated out-of-gas scenarios.
  uint16 internal constant MAX_RET_BYTES = 4 + 4 * 32;
  /// @dev The expected number of bytes returned by the balanceOf function.
  uint256 internal constant MAX_BALANCE_OF_RET_BYTES = 32;

  /// @dev The address used to send calls for gas estimation.
  /// You only need to use this address if the minimum gas limit specified by the user is not actually enough to execute the
  /// given message and you're attempting to estimate the actual necessary gas limit
  address public constant GAS_ESTIMATION_SENDER = address(0xC11C11C11C11C11C11C11C11C11C11C11C11C1);

  /// @notice A collection of token price and gas price updates.
  /// @dev RMN depends on this struct, if changing, please notify the RMN maintainers.
  struct PriceUpdates {
    TokenPriceUpdate[] tokenPriceUpdates;
    GasPriceUpdate[] gasPriceUpdates;
  }

  /// @notice Token price in USD.
  /// @dev RMN depends on this struct, if changing, please notify the RMN maintainers.
  struct TokenPriceUpdate {
    address sourceToken; // Source token.
    uint224 usdPerToken; // 1e18 USD per 1e18 of the smallest token denomination.
  }

  /// @notice Gas price for a given chain in USD, its value may contain tightly packed fields.
  /// @dev RMN depends on this struct, if changing, please notify the RMN maintainers.
  struct GasPriceUpdate {
    uint64 destChainSelector; // Destination chain selector.
    uint224 usdPerUnitGas; // 1e18 USD per smallest unit (e.g. wei) of destination chain gas.
  }

  /// @notice A timestamped uint224 value that can contain several tightly packed fields.
  struct TimestampedPackedUint224 {
    uint224 value; // ────╮ Value in uint224, packed.
    uint32 timestamp; // ─╯ Timestamp of the most recent price update.
  }

  /// @dev Gas price is stored in 112-bit unsigned int. uint224 can pack 2 prices.
  /// When packing L1 and L2 gas prices, L1 gas price is left-shifted to the higher-order bits.
  /// Using uint8 type, which cannot be higher than other bit shift operands, to avoid shift operand type warning.
  uint8 public constant GAS_PRICE_BITS = 112;

  struct SourceTokenData {
    // The source pool address, abi encoded. This value is trusted as it was obtained through the onRamp. It can be
    // relied upon by the destination pool to validate the source pool.
    bytes sourcePoolAddress;
    // The address of the destination token, abi encoded in the case of EVM chains.
    // This value is UNTRUSTED as any pool owner can return whatever value they want.
    bytes destTokenAddress;
    // Optional pool data to be transferred to the destination chain. Be default this is capped at
    // CCIP_LOCK_OR_BURN_V1_RET_BYTES bytes. If more data is required, the TokenTransferFeeConfig.destBytesOverhead
    // has to be set for the specific token.
    bytes extraData;
    uint32 destGasAmount; // The amount of gas available for the releaseOrMint and balanceOf calls on the offRamp
  }

  /// @notice Report that is submitted by the execution DON at the execution phase, including chain selector data.
  /// @dev RMN depends on this struct, if changing, please notify the RMN maintainers.
  struct ExecutionReport {
    uint64 sourceChainSelector; // Source chain selector for which the report is submitted.
    Any2EVMRampMessage[] messages;
    // Contains a bytes array for each message, each inner bytes array contains bytes per transferred token.
    bytes[][] offchainTokenData;
    bytes32[] proofs;
    uint256 proofFlagBits;
  }

  /// @dev Any2EVMRampMessage struct has 10 fields, including 3 variable unnested arrays, sender, data and tokenAmounts.
  /// Each variable array takes 1 more slot to store its length.
  /// When abi encoded, excluding array contents, Any2EVMMessage takes up a fixed number of 13 slots, 32 bytes each.
  /// Assume 1 slot for sender
  /// For structs that contain arrays, 1 more slot is added to the front, reaching a total of 14.
  /// The fixed bytes does not cover struct data (this is represented by MESSAGE_FIXED_BYTES_PER_TOKEN)
  uint256 public constant MESSAGE_FIXED_BYTES = 32 * 15;

  /// @dev Any2EVMTokensTransfer struct bytes length
  /// 0x20
  /// sourcePoolAddress_offset
  /// destTokenAddress
  /// destGasAmount
  /// extraData_offset
  /// amount
  /// sourcePoolAddress_length
  /// sourcePoolAddress_content // assume 1 slot
  /// extraData_length // contents billed separately
  uint256 public constant MESSAGE_FIXED_BYTES_PER_TOKEN = 32 * (4 + (3 + 2));

  bytes32 internal constant ANY_2_EVM_MESSAGE_HASH = keccak256("Any2EVMMessageHashV1");
  bytes32 internal constant EVM_2_ANY_MESSAGE_HASH = keccak256("EVM2AnyMessageHashV1");

  /// @dev Used to hash messages for multi-lane family-agnostic OffRamps.
  /// OnRamp hash(EVM2AnyMessage) != Any2EVMRampMessage.messageId.
  /// OnRamp hash(EVM2AnyMessage) != OffRamp hash(Any2EVMRampMessage).
  /// @param original OffRamp message to hash.
  /// @param metadataHash Hash preimage to ensure global uniqueness.
  /// @return hashedMessage hashed message as a keccak256.
  function _hash(Any2EVMRampMessage memory original, bytes32 metadataHash) internal pure returns (bytes32) {
    // Fixed-size message fields are included in nested hash to reduce stack pressure.
    // This hashing scheme is also used by RMN. If changing it, please notify the RMN maintainers.
    return keccak256(
      abi.encode(
        MerkleMultiProof.LEAF_DOMAIN_SEPARATOR,
        metadataHash,
        keccak256(
          abi.encode(
            original.header.messageId,
            original.receiver,
            original.header.sequenceNumber,
            original.gasLimit,
            original.header.nonce
          )
        ),
        keccak256(original.sender),
        keccak256(original.data),
        keccak256(abi.encode(original.tokenAmounts))
      )
    );
  }

  function _hash(EVM2AnyRampMessage memory original, bytes32 metadataHash) internal pure returns (bytes32) {
    // Fixed-size message fields are included in nested hash to reduce stack pressure.
    // This hashing scheme is also used by RMN. If changing it, please notify the RMN maintainers.
    return keccak256(
      abi.encode(
        MerkleMultiProof.LEAF_DOMAIN_SEPARATOR,
        metadataHash,
        keccak256(
          abi.encode(
            original.sender,
            original.header.sequenceNumber,
            original.header.nonce,
            original.feeToken,
            original.feeTokenAmount
          )
        ),
        keccak256(original.receiver),
        keccak256(original.data),
        keccak256(abi.encode(original.tokenAmounts)),
        keccak256(original.extraArgs)
      )
    );
  }

  /// @dev We disallow the first 1024 addresses to avoid calling into a range known for hosting precompiles. Calling
  /// into precompiles probably won't cause any issues, but to be safe we can disallow this range. It is extremely
  /// unlikely that anyone would ever be able to generate an address in this range. There is no official range of
  /// precompiles, but EIP-7587 proposes to reserve the range 0x100 to 0x1ff. Our range is more conservative, even
  /// though it might not be exhaustive for all chains, which is OK. We also disallow the zero address, which is a
  /// common practice.
  uint256 public constant EVM_PRECOMPILE_SPACE = 1024;

  // According to the Aptos docs, the first 0xa addresses are reserved for precompiles.
  // https://github.com/aptos-labs/aptos-core/blob/main/aptos-move/framework/aptos-framework/doc/account.md#function-create_framework_reserved_account-1
  uint256 public constant APTOS_PRECOMPILE_SPACE = 0x0b;

  /// @notice This methods provides validation for parsing abi encoded addresses by ensuring the address is within the
  /// EVM address space. If it isn't it will revert with an InvalidEVMAddress error, which we can catch and handle
  /// more gracefully than a revert from abi.decode.
  function _validateEVMAddress(
    bytes memory encodedAddress
  ) internal pure {
    if (encodedAddress.length != 32) revert InvalidEVMAddress(encodedAddress);
    uint256 encodedAddressUint = abi.decode(encodedAddress, (uint256));
    if (encodedAddressUint > type(uint160).max || encodedAddressUint < EVM_PRECOMPILE_SPACE) {
      revert InvalidEVMAddress(encodedAddress);
    }
  }

  /// @notice This methods provides validation for parsing abi encoded addresses by ensuring the address is within the
  /// bounds of [minValue, uint256.max]. If it isn't it will revert with an Invalid32ByteAddress error.
  function _validate32ByteAddress(bytes memory encodedAddress, uint256 minValue) internal pure {
    if (encodedAddress.length != 32) revert Invalid32ByteAddress(encodedAddress);
    if (minValue > 0) {
      if (abi.decode(encodedAddress, (uint256)) < minValue) {
        revert Invalid32ByteAddress(encodedAddress);
      }
    }
  }

  /// @notice Enum listing the possible message execution states within the offRamp contract.
  /// UNTOUCHED never executed.
  /// IN_PROGRESS currently being executed, used a replay protection.
  /// SUCCESS successfully executed. End state.
  /// FAILURE unsuccessfully executed, manual execution is now enabled.
  /// @dev RMN depends on this enum, if changing, please notify the RMN maintainers.
  enum MessageExecutionState {
    UNTOUCHED,
    IN_PROGRESS,
    SUCCESS,
    FAILURE
  }

  /// @notice CCIP OCR plugin type, used to separate execution & commit transmissions and configs.
  enum OCRPluginType {
    Commit,
    Execution
  }

  /// @notice Family-agnostic header for OnRamp & OffRamp messages.
  /// The messageId is not expected to match hash(message), since it may originate from another ramp family.
  struct RampMessageHeader {
    bytes32 messageId; // Unique identifier for the message, generated with the source chain's encoding scheme (i.e. not necessarily abi.encoded).
    uint64 sourceChainSelector; // ─╮ the chain selector of the source chain, note: not chainId.
    uint64 destChainSelector; //    │ the chain selector of the destination chain, note: not chainId.
    uint64 sequenceNumber; //       │ sequence number, not unique across lanes.
    uint64 nonce; // ───────────────╯ nonce for this lane for this sender, not unique across senders/lanes.
  }

  struct EVM2AnyTokenTransfer {
    // The source pool EVM address. This value is trusted as it was obtained through the onRamp. It can be relied
    // upon by the destination pool to validate the source pool.
    address sourcePoolAddress;
    // The EVM address of the destination token.
    // This value is UNTRUSTED as any pool owner can return whatever value they want.
    bytes destTokenAddress;
    // Optional pool data to be transferred to the destination chain. Be default this is capped at
    // CCIP_LOCK_OR_BURN_V1_RET_BYTES bytes. If more data is required, the TokenTransferFeeConfig.destBytesOverhead
    // has to be set for the specific token.
    bytes extraData;
    uint256 amount; // Amount of tokens.
    // Destination chain data used to execute the token transfer on the destination chain. For an EVM destination, it
    // consists of the amount of gas available for the releaseOrMint and transfer calls made by the offRamp.
    bytes destExecData;
  }

  struct Any2EVMTokenTransfer {
    // The source pool EVM address encoded to bytes. This value is trusted as it is obtained through the onRamp. It can
    // be relied upon by the destination pool to validate the source pool.
    bytes sourcePoolAddress;
    address destTokenAddress; // ─╮ Address of destination token
    uint32 destGasAmount; // ─────╯ The amount of gas available for the releaseOrMint and transfer calls on the offRamp.
    // Optional pool data to be transferred to the destination chain. Be default this is capped at
    // CCIP_LOCK_OR_BURN_V1_RET_BYTES bytes. If more data is required, the TokenTransferFeeConfig.destBytesOverhead
    // has to be set for the specific token.
    bytes extraData;
    uint256 amount; // Amount of tokens.
  }

  /// @notice Family-agnostic message routed to an OffRamp.
  /// Note: hash(Any2EVMRampMessage) != hash(EVM2AnyRampMessage), hash(Any2EVMRampMessage) != messageId due to encoding
  /// and parameter differences.
  struct Any2EVMRampMessage {
    RampMessageHeader header; // Message header.
    bytes sender; // sender address on the source chain.
    bytes data; // arbitrary data payload supplied by the message sender.
    address receiver; // receiver address on the destination chain.
    uint256 gasLimit; // user supplied maximum gas amount available for dest chain execution.
    Any2EVMTokenTransfer[] tokenAmounts; // array of tokens and amounts to transfer.
  }

  /// @notice Family-agnostic message emitted from the OnRamp.
  /// Note: hash(Any2EVMRampMessage) != hash(EVM2AnyRampMessage) due to encoding & parameter differences.
  /// messageId = hash(EVM2AnyRampMessage) using the source EVM chain's encoding format.
  struct EVM2AnyRampMessage {
    RampMessageHeader header; // Message header.
    address sender; // sender address on the source chain.
    bytes data; // arbitrary data payload supplied by the message sender.
    bytes receiver; // receiver address on the destination chain.
    bytes extraArgs; // destination-chain specific extra args, such as the gasLimit for EVM chains.
    address feeToken; // fee token.
    uint256 feeTokenAmount; // fee token amount.
    uint256 feeValueJuels; // fee amount in Juels.
    EVM2AnyTokenTransfer[] tokenAmounts; // array of tokens and amounts to transfer.
  }

  // bytes4(keccak256("CCIP ChainFamilySelector EVM"));
  bytes4 public constant CHAIN_FAMILY_SELECTOR_EVM = 0x2812d52c;

  // bytes4(keccak256("CCIP ChainFamilySelector SVM"));
  bytes4 public constant CHAIN_FAMILY_SELECTOR_SVM = 0x1e10bdc4;

  // bytes4(keccak256("CCIP ChainFamilySelector APTOS"));
  bytes4 public constant CHAIN_FAMILY_SELECTOR_APTOS = 0xac77ffec;

  // bytes4(keccak256("CCIP ChainFamilySelector SUI"));
  bytes4 public constant CHAIN_FAMILY_SELECTOR_SUI = 0xc4e05953;

  /// @dev Holds a merkle root and interval for a source chain so that an array of these can be passed in the CommitReport.
  /// @dev RMN depends on this struct, if changing, please notify the RMN maintainers.
  /// @dev inefficient struct packing intentionally chosen to maintain order of specificity. Not a storage struct so impact is minimal.
  // solhint-disable-next-line gas-struct-packing
  struct MerkleRoot {
    uint64 sourceChainSelector; // Remote source chain selector that the Merkle Root is scoped to
    bytes onRampAddress; //        Generic onRamp address, to support arbitrary sources; for EVM, use abi.encode
    uint64 minSeqNr; // ─────────╮ Minimum sequence number, inclusive
    uint64 maxSeqNr; // ─────────╯ Maximum sequence number, inclusive
    bytes32 merkleRoot; //         Merkle root covering the interval & source chain messages
  }
}

// SPDX-License-Identifier: BUSL-1.1
pragma solidity ^0.8.4;

library MerkleMultiProof {
  /// @notice Leaf domain separator, should be used as the first 32 bytes of a leaf's preimage.
  bytes32 internal constant LEAF_DOMAIN_SEPARATOR = 0x0000000000000000000000000000000000000000000000000000000000000000;
  /// @notice Internal domain separator, should be used as the first 32 bytes of an internal node's preimage.
  bytes32 internal constant INTERNAL_DOMAIN_SEPARATOR =
    0x0000000000000000000000000000000000000000000000000000000000000001;

  uint256 internal constant MAX_NUM_HASHES = 256;

  error InvalidProof();
  error LeavesCannotBeEmpty();

  /// @notice Computes the root based on provided pre-hashed leaf nodes in leaves, internal nodes  in proofs, and using
  /// proofFlagBits' i-th bit to determine if an element of proofs or one of the previously computed leafs or internal
  /// nodes will be used for the i-th hash.
  /// @param leaves Should be pre-hashed and the first 32 bytes of a leaf's preimage should match LEAF_DOMAIN_SEPARATOR.
  /// @param proofs Hashes to be used instead of a leaf hash when the proofFlagBits indicates a proof should be used.
  /// @param proofFlagBits A single uint256 of which each bit indicates whether a leaf or a proof needs to be used in
  /// a hash operation.
  /// @dev the maximum number of hash operations it set to 256. Any input that would require more than 256 hashes to get
  /// to a root will revert.
  /// @dev For given input `leaves` = [a,b,c] `proofs` = [D] and `proofFlagBits` = 5
  ///     totalHashes = 3 + 1 - 1 = 3
  ///  ** round 1 **
  ///    proofFlagBits = (5 >> 0) & 1 = true
  ///    hashes[0] = hashPair(a, b)
  ///    (leafPos, hashPos, proofPos) = (2, 0, 0);
  ///
  ///  ** round 2 **
  ///    proofFlagBits = (5 >> 1) & 1 = false
  ///    hashes[1] = hashPair(D, c)
  ///    (leafPos, hashPos, proofPos) = (3, 0, 1);
  ///
  ///  ** round 3 **
  ///    proofFlagBits = (5 >> 2) & 1 = true
  ///    hashes[2] = hashPair(hashes[0], hashes[1])
  ///    (leafPos, hashPos, proofPos) = (3, 2, 1);
  ///
  ///    i = 3 and no longer < totalHashes. The algorithm is done
  ///    return hashes[totalHashes - 1] = hashes[2]; the last hash we computed.
  // We mark this function as internal to force it to be inlined in contracts that use it, but semantically it is public.
  function _merkleRoot(
    bytes32[] memory leaves,
    bytes32[] memory proofs,
    uint256 proofFlagBits
  ) internal pure returns (bytes32) {
    unchecked {
      uint256 leavesLen = leaves.length;
      uint256 proofsLen = proofs.length;
      if (leavesLen == 0) revert LeavesCannotBeEmpty();
      if (!(leavesLen <= MAX_NUM_HASHES + 1 && proofsLen <= MAX_NUM_HASHES + 1)) revert InvalidProof();
      uint256 totalHashes = leavesLen + proofsLen - 1;
      if (!(totalHashes <= MAX_NUM_HASHES)) revert InvalidProof();
      if (totalHashes == 0) {
        return leaves[0];
      }
      bytes32[] memory hashes = new bytes32[](totalHashes);
      (uint256 leafPos, uint256 hashPos, uint256 proofPos) = (0, 0, 0);

      for (uint256 i = 0; i < totalHashes; ++i) {
        // Checks if the bit flag signals the use of a supplied proof or a leaf/previous hash.
        bytes32 a;
        if (proofFlagBits & (1 << i) == (1 << i)) {
          // Use a leaf or a previously computed hash.
          if (leafPos < leavesLen) {
            a = leaves[leafPos++];
          } else {
            a = hashes[hashPos++];
          }
        } else {
          // Use a supplied proof.
          a = proofs[proofPos++];
        }

        // The second part of the hashed pair is never a proof as hashing two proofs would result in a
        // hash that can already be computed offchain.
        bytes32 b;
        if (leafPos < leavesLen) {
          b = leaves[leafPos++];
        } else {
          b = hashes[hashPos++];
        }

        if (!(hashPos <= i)) revert InvalidProof();

        hashes[i] = _hashPair(a, b);
      }
      if (!(hashPos == totalHashes - 1 && leafPos == leavesLen && proofPos == proofsLen)) revert InvalidProof();
      // Return the last hash.
      return hashes[totalHashes - 1];
    }
  }

  /// @notice Hashes two bytes32 objects in their given order, prepended by the INTERNAL_DOMAIN_SEPARATOR.
  function _hashInternalNode(bytes32 left, bytes32 right) private pure returns (bytes32 hash) {
    return keccak256(abi.encode(INTERNAL_DOMAIN_SEPARATOR, left, right));
  }

  /// @notice Hashes two bytes32 objects. The order is taken into account, using the lower value first.
  function _hashPair(bytes32 a, bytes32 b) private pure returns (bytes32) {
    return a < b ? _hashInternalNode(a, b) : _hashInternalNode(b, a);
  }
}

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

/// @notice This library contains various token pool functions to aid constructing the return data.
library Pool {
  // The tag used to signal support for the pool v1 standard.
  // bytes4(keccak256("CCIP_POOL_V1"))
  bytes4 public constant CCIP_POOL_V1 = 0xaff2afbf;

  // The number of bytes in the return data for a pool v1 releaseOrMint call.
  // This should match the size of the ReleaseOrMintOutV1 struct.
  uint16 public constant CCIP_POOL_V1_RET_BYTES = 32;

  // The default max number of bytes in the return data for a pool v1 lockOrBurn call.
  // This data can be used to send information to the destination chain token pool. Can be overwritten
  // in the TokenTransferFeeConfig.destBytesOverhead if more data is required.
  uint32 public constant CCIP_LOCK_OR_BURN_V1_RET_BYTES = 32;

  struct LockOrBurnInV1 {
    bytes receiver; //  The recipient of the tokens on the destination chain, abi encoded.
    uint64 remoteChainSelector; // ─╮ The chain ID of the destination chain.
    address originalSender; // ─────╯ The original sender of the tx on the source chain.
    uint256 amount; //  The amount of tokens to lock or burn, denominated in the source token's decimals.
    address localToken; //  The address on this chain of the token to lock or burn.
  }

  struct LockOrBurnOutV1 {
    // The address of the destination token, abi encoded in the case of EVM chains.
    // This value is UNTRUSTED as any pool owner can return whatever value they want.
    bytes destTokenAddress;
    // Optional pool data to be transferred to the destination chain. Be default this is capped at
    // CCIP_LOCK_OR_BURN_V1_RET_BYTES bytes. If more data is required, the TokenTransferFeeConfig.destBytesOverhead
    // has to be set for the specific token.
    bytes destPoolData;
  }

  struct ReleaseOrMintInV1 {
    bytes originalSender; //          The original sender of the tx on the source chain.
    uint64 remoteChainSelector; // ─╮ The chain ID of the source chain.
    address receiver; // ───────────╯ The recipient of the tokens on the destination chain.
    uint256 amount; //                The amount of tokens to release or mint, denominated in the source token's decimals.
    address localToken; //            The address on this chain of the token to release or mint.
    /// @dev WARNING: sourcePoolAddress should be checked prior to any processing of funds. Make sure it matches the
    /// expected pool address for the given remoteChainSelector.
    bytes sourcePoolAddress; //       The address of the source pool, abi encoded in the case of EVM chains.
    bytes sourcePoolData; //          The data received from the source pool to process the release or mint.
    /// @dev WARNING: offchainTokenData is untrusted data.
    bytes offchainTokenData; //       The offchain data to process the release or mint.
  }

  struct ReleaseOrMintOutV1 {
    // The number of tokens released or minted on the destination chain, denominated in the local token's decimals.
    // This value is expected to be equal to the ReleaseOrMintInV1.amount in the case where the source and destination
    // chain have the same number of decimals.
    uint256 destinationAmount;
  }
}

// SPDX-License-Identifier: BUSL-1.1
pragma solidity ^0.8.0;

library USDPriceWith18Decimals {
  /// @notice Takes a price in USD, with 18 decimals per 1e18 token amount, and amount of the smallest token
  /// denomination, calculates the value in USD with 18 decimals.
  /// @param tokenPrice The USD price of the token.
  /// @param tokenAmount Amount of the smallest token denomination.
  /// @return USD value with 18 decimals.
  /// @dev this function assumes that no more than 1e59 US dollar worth of token is passed in. If more is sent, this
  /// function will overflow and revert. Since there isn't even close to 1e59 dollars, this is ok for all legit tokens.
  function _calcUSDValueFromTokenAmount(uint224 tokenPrice, uint256 tokenAmount) internal pure returns (uint256) {
    /// LINK Example:
    /// tokenPrice:         8e18 -> $8/LINK, as 1e18 token amount is 1 LINK, worth 8 USD, or 8e18 with 18 decimals
    /// tokenAmount:        2e18 -> 2 LINK
    /// result:             8e18 * 2e18 / 1e18 -> 16e18 with 18 decimals = $16

    /// USDC Example:
    /// tokenPrice:         1e30 -> $1/USDC, as 1e18 token amount is 1e12 USDC, worth 1e12 USD, or 1e30 with 18 decimals
    /// tokenAmount:        5e6  -> 5 USDC
    /// result:             1e30 * 5e6 / 1e18 -> 5e18 with 18 decimals = $5
    return (tokenPrice * tokenAmount) / 1e18;
  }

  /// @notice Takes a price in USD, with 18 decimals per 1e18 token amount, and USD value with 18 decimals, calculates
  /// amount of the smallest token denomination.
  /// @param tokenPrice The USD price of the token.
  /// @param usdValue USD value with 18 decimals.
  /// @return Amount of the smallest token denomination.
  function _calcTokenAmountFromUSDValue(uint224 tokenPrice, uint256 usdValue) internal pure returns (uint256) {
    /// LINK Example:
    /// tokenPrice:          8e18 -> $8/LINK, as 1e18 token amount is 1 LINK, worth 8 USD, or 8e18 with 18 decimals
    /// usdValue:           16e18 -> $16
    /// result:             16e18 * 1e18 / 8e18 -> 2e18 = 2 LINK

    /// USDC Example:
    /// tokenPrice:         1e30 -> $1/USDC, as 1e18 token amount is 1e12 USDC, worth 1e12 USD, or 1e30 with 18 decimals
    /// usdValue:           5e18 -> $5
    /// result:             5e18 * 1e18 / 1e30 -> 5e6 = 5 USDC
    return (usdValue * 1e18) / tokenPrice;
  }
}

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

import {Ownable2StepMsgSender} from "../shared/access/Ownable2StepMsgSender.sol";

/// @title Keystone Feeds Permission Handler
/// @notice This contract is designed to manage and validate permissions for accessing specific reports within a decentralized system.
/// @dev The contract uses mappings to keep track of report permissions associated with a unique report ID.
abstract contract KeystoneFeedsPermissionHandler is Ownable2StepMsgSender {
  /// @notice Holds the details for permissions of a report
  /// @dev Workflow names and report names are stored as bytes to optimize for gas efficiency.
  struct Permission {
    address forwarder; // ─────╮ The address of the forwarder (20 bytes)
    bytes10 workflowName; //   │ The name of the workflow in bytes10
    bytes2 reportName; // ─────╯ The name of the report in bytes2
    address workflowOwner; // ─╮ The address of the workflow owner (20 bytes)
    bool isAllowed; // ────────╯ Whether the report is allowed or not (1 byte)
  }

  /// @notice Event emitted when report permissions are set
  event ReportPermissionSet(bytes32 indexed reportId, Permission permission);

  /// @notice Error to be thrown when an unauthorized access attempt is made
  error ReportForwarderUnauthorized(address forwarder, address workflowOwner, bytes10 workflowName, bytes2 reportName);

  /// @dev Mapping from a report ID to a boolean indicating whether the report is allowed or not
  mapping(bytes32 reportId => bool isAllowed) internal s_allowedReports;

  /// @notice Sets permissions for multiple reports
  /// @param permissions An array of Permission structs for which to set permissions
  /// @dev Emits a ReportPermissionSet event for each permission set
  function setReportPermissions(Permission[] memory permissions) external onlyOwner {
    for (uint256 i; i < permissions.length; ++i) {
      _setReportPermission(permissions[i]);
    }
  }

  /// @dev Internal function to set a single report permission
  /// @param permission The Permission struct containing details about the permission to set
  /// @dev Emits a ReportPermissionSet event
  function _setReportPermission(Permission memory permission) internal {
    bytes32 reportId = _createReportId(
      permission.forwarder,
      permission.workflowOwner,
      permission.workflowName,
      permission.reportName
    );
    s_allowedReports[reportId] = permission.isAllowed;
    emit ReportPermissionSet(reportId, permission);
  }

  /// @dev Internal view function to validate if a report is allowed for a given set of details
  /// @param forwarder The address of the forwarder
  /// @param workflowOwner The address of the workflow owner
  /// @param workflowName The name of the workflow in bytes10
  /// @param reportName The name of the report in bytes2
  /// @dev Reverts with Unauthorized if the report is not allowed
  function _validateReportPermission(
    address forwarder,
    address workflowOwner,
    bytes10 workflowName,
    bytes2 reportName
  ) internal view {
    bytes32 reportId = _createReportId(forwarder, workflowOwner, workflowName, reportName);
    if (!s_allowedReports[reportId]) {
      revert ReportForwarderUnauthorized(forwarder, workflowOwner, workflowName, reportName);
    }
  }

  /// @notice Generates a unique report ID based on the provided parameters.
  /// @dev The report ID is computed using the Keccak-256 hash function over the encoded parameters.
  /// @param forwarder The address of the forwarder associated with the report.
  /// @param workflowOwner The address of the owner of the workflow.
  /// @param workflowName The name of the workflow, represented as a 10-byte value.
  /// @param reportName The name of the report, represented as a 2-byte value.
  /// @return reportId The computed unique report ID as a bytes32 value.
  function _createReportId(
    address forwarder,
    address workflowOwner,
    bytes10 workflowName,
    bytes2 reportName
  ) internal pure returns (bytes32 reportId) {
    return keccak256(abi.encode(forwarder, workflowOwner, workflowName, reportName));
  }
}

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

import {IERC165} from "../../vendor/openzeppelin-solidity/v5.0.2/contracts/utils/introspection/IERC165.sol";

/// @title IReceiver - receives keystone reports
/// @notice Implementations must support the IReceiver interface through ERC165.
interface IReceiver is IERC165 {
  /// @notice Handles incoming keystone reports.
  /// @dev If this function call reverts, it can be retried with a higher gas
  /// limit. The receiver is responsible for discarding stale reports.
  /// @param metadata Report's metadata.
  /// @param report Workflow report.
  function onReport(bytes calldata metadata, bytes calldata report) external;
}

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

library KeystoneFeedDefaultMetadataLib {
  /**
   * Metadata Layout:
   *
   * +-------------------------------+--------------------+---------------------+---------------+
   * | 32 bytes (length prefix)      | 32 bytes           | 10 bytes            | 20 bytes      | 2 bytes        |
   * | (Not used in function)        | workflow_cid       | workflow_name       | workflow_owner| report_name    |
   * +-------------------------------+--------------------+---------------------+---------------+----------------+
   * |                               |                    |                     |               |                |
   * |          (Offset 0)           |     (Offset 32)    |     (Offset 64)     |  (Offset 74)  |  (Offset 94)   |
   * +-------------------------------+--------------------+---------------------+---------------+----------------+
   * @dev used to slice metadata bytes into workflowName, workflowOwner and report name
   */
  function _extractMetadataInfo(
    bytes memory metadata
  ) internal pure returns (bytes10 workflowName, address workflowOwner, bytes2 reportName) {
    // (first 32 bytes contain length of the byte array)
    // workflow_cid             // offset 32, size 32
    // workflow_name            // offset 64, size 10
    // workflow_owner           // offset 74, size 20
    // report_name              // offset 94, size  2
    assembly {
      // no shifting needed for bytes10 type
      workflowName := mload(add(metadata, 64))
      // shift right by 12 bytes to get the actual value
      workflowOwner := shr(mul(12, 8), mload(add(metadata, 74)))
      // no shifting needed for bytes2 type
      reportName := mload(add(metadata, 94))
    }
    return (workflowName, workflowOwner, reportName);
  }
}

// SPDX-License-Identifier: BUSL-1.1
pragma solidity ^0.8.4;

import {Ownable2StepMsgSender} from "./Ownable2StepMsgSender.sol";
import {EnumerableSet} from "../../vendor/openzeppelin-solidity/v4.8.3/contracts/utils/structs/EnumerableSet.sol";

/// @title The AuthorizedCallers contract
/// @notice A contract that manages multiple authorized callers. Enables restricting access to certain functions to a set of addresses.
contract AuthorizedCallers is Ownable2StepMsgSender {
  using EnumerableSet for EnumerableSet.AddressSet;

  event AuthorizedCallerAdded(address caller);
  event AuthorizedCallerRemoved(address caller);

  error UnauthorizedCaller(address caller);
  error ZeroAddressNotAllowed();

  /// @notice Update args for changing the authorized callers
  struct AuthorizedCallerArgs {
    address[] addedCallers;
    address[] removedCallers;
  }

  /// @dev Set of authorized callers
  EnumerableSet.AddressSet internal s_authorizedCallers;

  /// @param authorizedCallers the authorized callers to set
  constructor(address[] memory authorizedCallers) {
    _applyAuthorizedCallerUpdates(
      AuthorizedCallerArgs({addedCallers: authorizedCallers, removedCallers: new address[](0)})
    );
  }

  /// @return authorizedCallers Returns all authorized callers
  function getAllAuthorizedCallers() external view returns (address[] memory) {
    return s_authorizedCallers.values();
  }

  /// @notice Updates the list of authorized callers
  /// @param authorizedCallerArgs Callers to add and remove. Removals are performed first.
  function applyAuthorizedCallerUpdates(AuthorizedCallerArgs memory authorizedCallerArgs) external onlyOwner {
    _applyAuthorizedCallerUpdates(authorizedCallerArgs);
  }

  /// @notice Updates the list of authorized callers
  /// @param authorizedCallerArgs Callers to add and remove. Removals are performed first.
  function _applyAuthorizedCallerUpdates(AuthorizedCallerArgs memory authorizedCallerArgs) internal {
    address[] memory removedCallers = authorizedCallerArgs.removedCallers;
    for (uint256 i = 0; i < removedCallers.length; ++i) {
      address caller = removedCallers[i];

      if (s_authorizedCallers.remove(caller)) {
        emit AuthorizedCallerRemoved(caller);
      }
    }

    address[] memory addedCallers = authorizedCallerArgs.addedCallers;
    for (uint256 i = 0; i < addedCallers.length; ++i) {
      address caller = addedCallers[i];

      if (caller == address(0)) {
        revert ZeroAddressNotAllowed();
      }

      s_authorizedCallers.add(caller);
      emit AuthorizedCallerAdded(caller);
    }
  }

  /// @notice Checks the sender and reverts if it is anyone other than a listed authorized caller.
  function _validateCaller() internal view {
    if (!s_authorizedCallers.contains(msg.sender)) {
      revert UnauthorizedCaller(msg.sender);
    }
  }

  /// @notice Checks the sender and reverts if it is anyone other than a listed authorized caller.
  modifier onlyAuthorizedCallers() {
    _validateCaller();
    _;
  }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

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

/// @notice A minimal contract that implements 2-step ownership transfer and nothing more. It's made to be minimal
/// to reduce the impact of the bytecode size on any contract that inherits from it.
contract Ownable2Step is IOwnable {
  /// @notice The pending owner is the address to which ownership may be transferred.
  address private s_pendingOwner;
  /// @notice The owner is the current owner of the contract.
  /// @dev The owner is the second storage variable so any implementing contract could pack other state with it
  /// instead of the much less used s_pendingOwner.
  address private s_owner;

  error OwnerCannotBeZero();
  error MustBeProposedOwner();
  error CannotTransferToSelf();
  error OnlyCallableByOwner();

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

  constructor(address newOwner, address pendingOwner) {
    if (newOwner == address(0)) {
      revert OwnerCannotBeZero();
    }

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

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

  /// @notice Allows an owner to begin transferring ownership to a new address. The new owner needs to call
  /// `acceptOwnership` to accept the transfer before any permissions are changed.
  /// @param to The address to which ownership will be transferred.
  function transferOwnership(address to) public override onlyOwner {
    _transferOwnership(to);
  }

  /// @notice validate, transfer ownership, and emit relevant events
  /// @param to The address to which ownership will be transferred.
  function _transferOwnership(address to) private {
    if (to == msg.sender) {
      revert CannotTransferToSelf();
    }

    s_pendingOwner = to;

    emit OwnershipTransferRequested(s_owner, to);
  }

  /// @notice Allows an ownership transfer to be completed by the recipient.
  function acceptOwnership() external override {
    if (msg.sender != s_pendingOwner) {
      revert MustBeProposedOwner();
    }

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

    emit OwnershipTransferred(oldOwner, msg.sender);
  }

  /// @notice validate access
  function _validateOwnership() internal view {
    if (msg.sender != s_owner) {
      revert OnlyCallableByOwner();
    }
  }

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

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

import {Ownable2Step} from "./Ownable2Step.sol";

/// @notice Sets the msg.sender to be the owner of the contract and does not set a pending owner.
contract Ownable2StepMsgSender is Ownable2Step {
  constructor() Ownable2Step(msg.sender, address(0)) {}
}

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

// solhint-disable-next-line interface-starts-with-i
interface AggregatorV3Interface {
  function decimals() external view returns (uint8);

  function description() external view returns (string memory);

  function version() external view returns (uint256);

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

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

// 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 ITypeAndVersion {
  function typeAndVersion() external pure returns (string memory);
}

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

pragma solidity ^0.8.0;

/**
 * @dev Library for managing
 * https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive
 * types.
 *
 * Sets have the following properties:
 *
 * - Elements are added, removed, and checked for existence in constant time
 * (O(1)).
 * - Elements are enumerated in O(n). No guarantees are made on the ordering.
 *
 * ```
 * contract Example {
 *     // Add the library methods
 *     using EnumerableSet for EnumerableSet.AddressSet;
 *
 *     // Declare a set state variable
 *     EnumerableSet.AddressSet private mySet;
 * }
 * ```
 *
 * As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`)
 * and `uint256` (`UintSet`) are supported.
 *
 * [WARNING]
 * ====
 * Trying to delete such a structure from storage will likely result in data corruption, rendering the structure
 * unusable.
 * See https://github.com/ethereum/solidity/pull/11843[ethereum/solidity#11843] for more info.
 *
 * In order to clean an EnumerableSet, you can either remove all elements one by one or create a fresh instance using an
 * array of EnumerableSet.
 * ====
 */
library EnumerableSet {
  // To implement this library for multiple types with as little code
  // repetition as possible, we write it in terms of a generic Set type with
  // bytes32 values.
  // The Set implementation uses private functions, and user-facing
  // implementations (such as AddressSet) are just wrappers around the
  // underlying Set.
  // This means that we can only create new EnumerableSets for types that fit
  // in bytes32.

  struct Set {
    // Storage of set values
    bytes32[] _values;
    // Position of the value in the `values` array, plus 1 because index 0
    // means a value is not in the set.
    mapping(bytes32 => uint256) _indexes;
  }

  /**
   * @dev Add a value to a set. O(1).
   *
   * Returns true if the value was added to the set, that is if it was not
   * already present.
   */
  function _add(Set storage set, bytes32 value) private returns (bool) {
    if (!_contains(set, value)) {
      set._values.push(value);
      // The value is stored at length-1, but we add 1 to all indexes
      // and use 0 as a sentinel value
      set._indexes[value] = set._values.length;
      return true;
    } else {
      return false;
    }
  }

  /**
   * @dev Removes a value from a set. O(1).
   *
   * Returns true if the value was removed from the set, that is if it was
   * present.
   */
  function _remove(Set storage set, bytes32 value) private returns (bool) {
    // We read and store the value's index to prevent multiple reads from the same storage slot
    uint256 valueIndex = set._indexes[value];

    if (valueIndex != 0) {
      // Equivalent to contains(set, value)
      // To delete an element from the _values array in O(1), we swap the element to delete with the last one in
      // the array, and then remove the last element (sometimes called as 'swap and pop').
      // This modifies the order of the array, as noted in {at}.

      uint256 toDeleteIndex = valueIndex - 1;
      uint256 lastIndex = set._values.length - 1;

      if (lastIndex != toDeleteIndex) {
        bytes32 lastValue = set._values[lastIndex];

        // Move the last value to the index where the value to delete is
        set._values[toDeleteIndex] = lastValue;
        // Update the index for the moved value
        set._indexes[lastValue] = valueIndex; // Replace lastValue's index to valueIndex
      }

      // Delete the slot where the moved value was stored
      set._values.pop();

      // Delete the index for the deleted slot
      delete set._indexes[value];

      return true;
    } else {
      return false;
    }
  }

  /**
   * @dev Returns true if the value is in the set. O(1).
   */
  function _contains(Set storage set, bytes32 value) private view returns (bool) {
    return set._indexes[value] != 0;
  }

  /**
   * @dev Returns the number of values on the set. O(1).
   */
  function _length(Set storage set) private view returns (uint256) {
    return set._values.length;
  }

  /**
   * @dev Returns the value stored at position `index` in the set. O(1).
   *
   * Note that there are no guarantees on the ordering of values inside the
   * array, and it may change when more values are added or removed.
   *
   * Requirements:
   *
   * - `index` must be strictly less than {length}.
   */
  function _at(Set storage set, uint256 index) private view returns (bytes32) {
    return set._values[index];
  }

  /**
   * @dev Return the entire set in an array
   *
   * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
   * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
   * this function has an unbounded cost, and using it as part of a state-changing function may render the function
   * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
   */
  function _values(Set storage set) private view returns (bytes32[] memory) {
    return set._values;
  }

  // Bytes32Set

  struct Bytes32Set {
    Set _inner;
  }

  /**
   * @dev Add a value to a set. O(1).
   *
   * Returns true if the value was added to the set, that is if it was not
   * already present.
   */
  function add(Bytes32Set storage set, bytes32 value) internal returns (bool) {
    return _add(set._inner, value);
  }

  /**
   * @dev Removes a value from a set. O(1).
   *
   * Returns true if the value was removed from the set, that is if it was
   * present.
   */
  function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) {
    return _remove(set._inner, value);
  }

  /**
   * @dev Returns true if the value is in the set. O(1).
   */
  function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) {
    return _contains(set._inner, value);
  }

  /**
   * @dev Returns the number of values in the set. O(1).
   */
  function length(Bytes32Set storage set) internal view returns (uint256) {
    return _length(set._inner);
  }

  /**
   * @dev Returns the value stored at position `index` in the set. O(1).
   *
   * Note that there are no guarantees on the ordering of values inside the
   * array, and it may change when more values are added or removed.
   *
   * Requirements:
   *
   * - `index` must be strictly less than {length}.
   */
  function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) {
    return _at(set._inner, index);
  }

  /**
   * @dev Return the entire set in an array
   *
   * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
   * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
   * this function has an unbounded cost, and using it as part of a state-changing function may render the function
   * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
   */
  function values(Bytes32Set storage set) internal view returns (bytes32[] memory) {
    bytes32[] memory store = _values(set._inner);
    bytes32[] memory result;

    /// @solidity memory-safe-assembly
    assembly {
      result := store
    }

    return result;
  }

  // AddressSet

  struct AddressSet {
    Set _inner;
  }

  /**
   * @dev Add a value to a set. O(1).
   *
   * Returns true if the value was added to the set, that is if it was not
   * already present.
   */
  function add(AddressSet storage set, address value) internal returns (bool) {
    return _add(set._inner, bytes32(uint256(uint160(value))));
  }

  /**
   * @dev Removes a value from a set. O(1).
   *
   * Returns true if the value was removed from the set, that is if it was
   * present.
   */
  function remove(AddressSet storage set, address value) internal returns (bool) {
    return _remove(set._inner, bytes32(uint256(uint160(value))));
  }

  /**
   * @dev Returns true if the value is in the set. O(1).
   */
  function contains(AddressSet storage set, address value) internal view returns (bool) {
    return _contains(set._inner, bytes32(uint256(uint160(value))));
  }

  /**
   * @dev Returns the number of values in the set. O(1).
   */
  function length(AddressSet storage set) internal view returns (uint256) {
    return _length(set._inner);
  }

  /**
   * @dev Returns the value stored at position `index` in the set. O(1).
   *
   * Note that there are no guarantees on the ordering of values inside the
   * array, and it may change when more values are added or removed.
   *
   * Requirements:
   *
   * - `index` must be strictly less than {length}.
   */
  function at(AddressSet storage set, uint256 index) internal view returns (address) {
    return address(uint160(uint256(_at(set._inner, index))));
  }

  /**
   * @dev Return the entire set in an array
   *
   * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
   * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
   * this function has an unbounded cost, and using it as part of a state-changing function may render the function
   * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
   */
  function values(AddressSet storage set) internal view returns (address[] memory) {
    bytes32[] memory store = _values(set._inner);
    address[] memory result;

    /// @solidity memory-safe-assembly
    assembly {
      result := store
    }

    return result;
  }

  // UintSet

  struct UintSet {
    Set _inner;
  }

  /**
   * @dev Add a value to a set. O(1).
   *
   * Returns true if the value was added to the set, that is if it was not
   * already present.
   */
  function add(UintSet storage set, uint256 value) internal returns (bool) {
    return _add(set._inner, bytes32(value));
  }

  /**
   * @dev Removes a value from a set. O(1).
   *
   * Returns true if the value was removed from the set, that is if it was
   * present.
   */
  function remove(UintSet storage set, uint256 value) internal returns (bool) {
    return _remove(set._inner, bytes32(value));
  }

  /**
   * @dev Returns true if the value is in the set. O(1).
   */
  function contains(UintSet storage set, uint256 value) internal view returns (bool) {
    return _contains(set._inner, bytes32(value));
  }

  /**
   * @dev Returns the number of values in the set. O(1).
   */
  function length(UintSet storage set) internal view returns (uint256) {
    return _length(set._inner);
  }

  /**
   * @dev Returns the value stored at position `index` in the set. O(1).
   *
   * Note that there are no guarantees on the ordering of values inside the
   * array, and it may change when more values are added or removed.
   *
   * Requirements:
   *
   * - `index` must be strictly less than {length}.
   */
  function at(UintSet storage set, uint256 index) internal view returns (uint256) {
    return uint256(_at(set._inner, index));
  }

  /**
   * @dev Return the entire set in an array
   *
   * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
   * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
   * this function has an unbounded cost, and using it as part of a state-changing function may render the function
   * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
   */
  function values(UintSet storage set) internal view returns (uint256[] memory) {
    bytes32[] memory store = _values(set._inner);
    uint256[] memory result;

    /// @solidity memory-safe-assembly
    assembly {
      result := store
    }

    return result;
  }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (interfaces/IERC165.sol)

pragma solidity ^0.8.20;

import {IERC165} from "../utils/introspection/IERC165.sol";

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/introspection/IERC165.sol)

pragma solidity ^0.8.20;

/**
 * @dev Interface of the ERC165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[EIP].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165 {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/structs/EnumerableSet.sol)
// This file was procedurally generated from scripts/generate/templates/EnumerableSet.js.

pragma solidity ^0.8.20;

/**
 * @dev Library for managing
 * https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive
 * types.
 *
 * Sets have the following properties:
 *
 * - Elements are added, removed, and checked for existence in constant time
 * (O(1)).
 * - Elements are enumerated in O(n). No guarantees are made on the ordering.
 *
 * ```solidity
 * contract Example {
 *     // Add the library methods
 *     using EnumerableSet for EnumerableSet.AddressSet;
 *
 *     // Declare a set state variable
 *     EnumerableSet.AddressSet private mySet;
 * }
 * ```
 *
 * As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`)
 * and `uint256` (`UintSet`) are supported.
 *
 * [WARNING]
 * ====
 * Trying to delete such a structure from storage will likely result in data corruption, rendering the structure
 * unusable.
 * See https://github.com/ethereum/solidity/pull/11843[ethereum/solidity#11843] for more info.
 *
 * In order to clean an EnumerableSet, you can either remove all elements one by one or create a fresh instance using an
 * array of EnumerableSet.
 * ====
 */
library EnumerableSet {
    // To implement this library for multiple types with as little code
    // repetition as possible, we write it in terms of a generic Set type with
    // bytes32 values.
    // The Set implementation uses private functions, and user-facing
    // implementations (such as AddressSet) are just wrappers around the
    // underlying Set.
    // This means that we can only create new EnumerableSets for types that fit
    // in bytes32.

    struct Set {
        // Storage of set values
        bytes32[] _values;
        // Position is the index of the value in the `values` array plus 1.
        // Position 0 is used to mean a value is not in the set.
        mapping(bytes32 value => uint256) _positions;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function _add(Set storage set, bytes32 value) private returns (bool) {
        if (!_contains(set, value)) {
            set._values.push(value);
            // The value is stored at length-1, but we add 1 to all indexes
            // and use 0 as a sentinel value
            set._positions[value] = set._values.length;
            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function _remove(Set storage set, bytes32 value) private returns (bool) {
        // We cache the value's position to prevent multiple reads from the same storage slot
        uint256 position = set._positions[value];

        if (position != 0) {
            // Equivalent to contains(set, value)
            // To delete an element from the _values array in O(1), we swap the element to delete with the last one in
            // the array, and then remove the last element (sometimes called as 'swap and pop').
            // This modifies the order of the array, as noted in {at}.

            uint256 valueIndex = position - 1;
            uint256 lastIndex = set._values.length - 1;

            if (valueIndex != lastIndex) {
                bytes32 lastValue = set._values[lastIndex];

                // Move the lastValue to the index where the value to delete is
                set._values[valueIndex] = lastValue;
                // Update the tracked position of the lastValue (that was just moved)
                set._positions[lastValue] = position;
            }

            // Delete the slot where the moved value was stored
            set._values.pop();

            // Delete the tracked position for the deleted slot
            delete set._positions[value];

            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function _contains(Set storage set, bytes32 value) private view returns (bool) {
        return set._positions[value] != 0;
    }

    /**
     * @dev Returns the number of values on the set. O(1).
     */
    function _length(Set storage set) private view returns (uint256) {
        return set._values.length;
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function _at(Set storage set, uint256 index) private view returns (bytes32) {
        return set._values[index];
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function _values(Set storage set) private view returns (bytes32[] memory) {
        return set._values;
    }

    // Bytes32Set

    struct Bytes32Set {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(Bytes32Set storage set, bytes32 value) internal returns (bool) {
        return _add(set._inner, value);
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) {
        return _remove(set._inner, value);
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) {
        return _contains(set._inner, value);
    }

    /**
     * @dev Returns the number of values in the set. O(1).
     */
    function length(Bytes32Set storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) {
        return _at(set._inner, index);
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function values(Bytes32Set storage set) internal view returns (bytes32[] memory) {
        bytes32[] memory store = _values(set._inner);
        bytes32[] memory result;

        /// @solidity memory-safe-assembly
        assembly {
            result := store
        }

        return result;
    }

    // AddressSet

    struct AddressSet {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(AddressSet storage set, address value) internal returns (bool) {
        return _add(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(AddressSet storage set, address value) internal returns (bool) {
        return _remove(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(AddressSet storage set, address value) internal view returns (bool) {
        return _contains(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Returns the number of values in the set. O(1).
     */
    function length(AddressSet storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(AddressSet storage set, uint256 index) internal view returns (address) {
        return address(uint160(uint256(_at(set._inner, index))));
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function values(AddressSet storage set) internal view returns (address[] memory) {
        bytes32[] memory store = _values(set._inner);
        address[] memory result;

        /// @solidity memory-safe-assembly
        assembly {
            result := store
        }

        return result;
    }

    // UintSet

    struct UintSet {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(UintSet storage set, uint256 value) internal returns (bool) {
        return _add(set._inner, bytes32(value));
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(UintSet storage set, uint256 value) internal returns (bool) {
        return _remove(set._inner, bytes32(value));
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(UintSet storage set, uint256 value) internal view returns (bool) {
        return _contains(set._inner, bytes32(value));
    }

    /**
     * @dev Returns the number of values in the set. O(1).
     */
    function length(UintSet storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(UintSet storage set, uint256 index) internal view returns (uint256) {
        return uint256(_at(set._inner, index));
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function values(UintSet storage set) internal view returns (uint256[] memory) {
        bytes32[] memory store = _values(set._inner);
        uint256[] memory result;

        /// @solidity memory-safe-assembly
        assembly {
            result := store
        }

        return result;
    }
}

{
  "evmVersion": "paris",
  "libraries": {},
  "metadata": {
    "appendCBOR": true,
    "bytecodeHash": "none",
    "useLiteralContent": false
  },
  "optimizer": {
    "enabled": true,
    "runs": 8000
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "remappings": [
    "forge-std/=node_modules/@chainlink/contracts/src/v0.8/vendor/forge-std/src/",
    "@chainlink/contracts/=node_modules/@chainlink/contracts/"
  ],
  "viaIR": true
}

• No Contract Security Audit Submitted- Submit Audit Here

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FeeQuoter.TokenTransferFeeConfig","name":"tokenTransferFeeConfig","type":"tuple"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint64","name":"destChainSelector","type":"uint64"},{"components":[{"internalType":"bytes","name":"receiver","type":"bytes"},{"internalType":"bytes","name":"data","type":"bytes"},{"components":[{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"internalType":"struct Client.EVMTokenAmount[]","name":"tokenAmounts","type":"tuple[]"},{"internalType":"address","name":"feeToken","type":"address"},{"internalType":"bytes","name":"extraArgs","type":"bytes"}],"internalType":"struct Client.EVM2AnyMessage","name":"message","type":"tuple"}],"name":"getValidatedFee","outputs":[{"internalType":"uint256","name":"feeTokenAmount","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"}],"name":"getValidatedTokenPrice","outputs":[{"internalType":"uint224","name":"","type":"uint224"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes","name":"metadata","type":"bytes"},{"internalType":"bytes","name":"report","type":"bytes"}],"name":"onReport","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint64","name":"destChainSelector","type":"uint64"},{"internalType":"address","name":"feeToken","type":"address"},{"internalType":"uint256","name":"feeTokenAmount","type":"uint256"},{"internalType":"bytes","name":"extraArgs","type":"bytes"},{"internalType":"bytes","name":"messageReceiver","type":"bytes"}],"name":"processMessageArgs","outputs":[{"internalType":"uint256","name":"msgFeeJuels","type":"uint256"},{"internalType":"bool","name":"isOutOfOrderExecution","type":"bool"},{"internalType":"bytes","name":"convertedExtraArgs","type":"bytes"},{"internalType":"bytes","name":"tokenReceiver","type":"bytes"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint64","name":"destChainSelector","type":"uint64"},{"components":[{"internalType":"address","name":"sourcePoolAddress","type":"address"},{"internalType":"bytes","name":"destTokenAddress","type":"bytes"},{"internalType":"bytes","name":"extraData","type":"bytes"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"bytes","name":"destExecData","type":"bytes"}],"internalType":"struct Internal.EVM2AnyTokenTransfer[]","name":"onRampTokenTransfers","type":"tuple[]"},{"components":[{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"internalType":"struct Client.EVMTokenAmount[]","name":"sourceTokenAmounts","type":"tuple[]"}],"name":"processPoolReturnData","outputs":[{"internalType":"bytes[]","name":"destExecDataPerToken","type":"bytes[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"components":[{"internalType":"address","name":"forwarder","type":"address"},{"internalType":"bytes10","name":"workflowName","type":"bytes10"},{"internalType":"bytes2","name":"reportName","type":"bytes2"},{"internalType":"address","name":"workflowOwner","type":"address"},{"internalType":"bool","name":"isAllowed","type":"bool"}],"internalType":"struct KeystoneFeedsPermissionHandler.Permission[]","name":"permissions","type":"tuple[]"}],"name":"setReportPermissions","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes4","name":"interfaceId","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"typeAndVersion","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"components":[{"components":[{"internalType":"address","name":"sourceToken","type":"address"},{"internalType":"uint224","name":"usdPerToken","type":"uint224"}],"internalType":"struct Internal.TokenPriceUpdate[]","name":"tokenPriceUpdates","type":"tuple[]"},{"components":[{"internalType":"uint64","name":"destChainSelector","type":"uint64"},{"internalType":"uint224","name":"usdPerUnitGas","type":"uint224"}],"internalType":"struct Internal.GasPriceUpdate[]","name":"gasPriceUpdates","type":"tuple[]"}],"internalType":"struct Internal.PriceUpdates","name":"priceUpdates","type":"tuple"}],"name":"updatePrices","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"components":[{"internalType":"address","name":"sourceToken","type":"address"},{"components":[{"internalType":"address","name":"dataFeedAddress","type":"address"},{"internalType":"uint8","name":"tokenDecimals","type":"uint8"},{"internalType":"bool","name":"isEnabled","type":"bool"}],"internalType":"struct FeeQuoter.TokenPriceFeedConfig","name":"feedConfig","type":"tuple"}],"internalType":"struct FeeQuoter.TokenPriceFeedUpdate[]","name":"tokenPriceFeedUpdates","type":"tuple[]"}],"name":"updateTokenPriceFeeds","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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