refactor _getTokenAndGasPrices

contracts/src/v0.8/ccip/FeeQuoter.sol

@@ -35,7 +35,6 @@ contract FeeQuoter is AuthorizedCallers, IFeeQuoter, ITypeAndVersion, IReceiver,
   error DataFeedValueOutOfUint224Range();
   error InvalidDestBytesOverhead(address token, uint32 destBytesOverhead);
   error MessageGasLimitTooHigh();
-  error DestinationChainNotEnabled(uint64 destChainSelector);
   error ExtraArgOutOfOrderExecutionMustBeTrue();
   error InvalidExtraArgsTag();
   error SourceTokenDataTooLarge(address token);
@@ -308,7 +307,9 @@ contract FeeQuoter is AuthorizedCallers, IFeeQuoter, ITypeAndVersion, IReceiver,
     address token,
     uint64 destChainSelector
   ) external view returns (uint224 tokenPrice, uint224 gasPriceValue) {
-    return _getTokenAndGasPrices(token, destChainSelector, s_destChainConfigs[destChainSelector]);
+    if (!s_destChainConfigs[destChainSelector].isEnabled) revert ChainNotSupported(destChainSelector);
+    return
+      _getTokenAndGasPrices(token, destChainSelector, s_destChainConfigs[destChainSelector].gasPriceStalenessThreshold);
   }
 
   /// @notice Convert a given token amount to target token amount.
@@ -373,22 +374,20 @@ contract FeeQuoter is AuthorizedCallers, IFeeQuoter, ITypeAndVersion, IReceiver,
   /// @dev 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.
-  /// @param destChainConfig The config struct for the dest chain selector.
   /// @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,
-    DestChainConfig memory destChainConfig
+    uint32 gasPriceStalenessThreshold
   ) private view returns (uint224 tokenPrice, uint224 gasPriceValue) {
-    if (!destChainConfig.isEnabled) revert ChainNotSupported(destChainSelector);
     Internal.TimestampedPackedUint224 memory gasPrice = s_usdPerUnitGasByDestChainSelector[destChainSelector];
     // If the staleness threshold is 0, we consider the gas price to be always valid
-    if (destChainConfig.gasPriceStalenessThreshold != 0) {
+    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 > destChainConfig.gasPriceStalenessThreshold) {
-        revert StaleGasPrice(destChainSelector, destChainConfig.gasPriceStalenessThreshold, timePassed);
+      if (timePassed > gasPriceStalenessThreshold) {
+        revert StaleGasPrice(destChainSelector, gasPriceStalenessThreshold, timePassed);
       }
     }
 
@@ -521,15 +520,15 @@ contract FeeQuoter is AuthorizedCallers, IFeeQuoter, ITypeAndVersion, IReceiver,
     Client.EVM2AnyMessage calldata message
   ) external view returns (uint256 feeTokenAmount) {
     DestChainConfig memory destChainConfig = s_destChainConfigs[destChainSelector];
-    if (!destChainConfig.isEnabled) revert DestinationChainNotEnabled(destChainSelector);
+    if (!destChainConfig.isEnabled) revert ChainNotSupported(destChainSelector);
     if (!s_feeTokens.contains(message.feeToken)) revert FeeTokenNotSupported(message.feeToken);
 
     uint256 numberOfTokens = message.tokenAmounts.length;
     _validateMessage(destChainConfig, message.data.length, numberOfTokens, message.receiver);
 
     // The below call asserts that feeToken is a supported token
     (uint224 feeTokenPrice, uint224 packedGasPrice) =
-      _getTokenAndGasPrices(message.feeToken, destChainSelector, destChainConfig);
+      _getTokenAndGasPrices(message.feeToken, 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.

contracts/src/v0.8/ccip/test/feeQuoter/FeeQuoter.t.sol

@@ -1658,8 +1658,8 @@ contract FeeQuoter_getValidatedFee is FeeQuoterFeeSetup {
 
   // Reverts
 
-  function test_DestinationChainNotEnabled_Revert() public {
-    vm.expectRevert(abi.encodeWithSelector(FeeQuoter.DestinationChainNotEnabled.selector, DEST_CHAIN_SELECTOR + 1));
+  function test_ChainNotSupported_Revert() public {
+    vm.expectRevert(abi.encodeWithSelector(FeeQuoter.ChainNotSupported.selector, DEST_CHAIN_SELECTOR + 1));
     s_feeQuoter.getValidatedFee(DEST_CHAIN_SELECTOR + 1, _generateEmptyMessage());
   }