Implement getTotalChainConfigurations (#1419)

## Motivation
The goal of this PR is to add a getter function to the `CCIPConfig`
contract to fetch the total number of chains configured. This value is
necessary to correctly call `getAllChainConfigs` and previously, the
only way to access it was through events.

## Solution
Implement `getTotalChainConfigurations`.

contracts/gas-snapshots/ccip.gas-snapshot

@@ -36,44 +36,44 @@ BurnWithFromMintTokenPool_lockOrBurn:test_PoolBurn_Success() (gas: 243707)
 BurnWithFromMintTokenPool_lockOrBurn:test_Setup_Success() (gas: 23951)
 CCIPClientExample_sanity:test_ImmutableExamples_Success() (gas: 2096747)
 CCIPConfigSetup:test_getCapabilityConfiguration_Success() (gas: 9539)
-CCIPConfig_ConfigStateMachine:test__computeConfigDigest_Success() (gas: 66088)
-CCIPConfig_ConfigStateMachine:test__computeNewConfigWithMeta_InitToRunning_Success() (gas: 358063)
-CCIPConfig_ConfigStateMachine:test__computeNewConfigWithMeta_RunningToStaging_Success() (gas: 474771)
-CCIPConfig_ConfigStateMachine:test__computeNewConfigWithMeta_StagingToRunning_Success() (gas: 441974)
-CCIPConfig_ConfigStateMachine:test__groupByPluginType_TooManyOCR3Configs_Reverts() (gas: 33804)
-CCIPConfig_ConfigStateMachine:test__groupByPluginType_threeCommitConfigs_Reverts() (gas: 56870)
-CCIPConfig_ConfigStateMachine:test__groupByPluginType_threeExecutionConfigs_Reverts() (gas: 56808)
+CCIPConfig_ConfigStateMachine:test__computeConfigDigest_Success() (gas: 66000)
+CCIPConfig_ConfigStateMachine:test__computeNewConfigWithMeta_InitToRunning_Success() (gas: 358041)
+CCIPConfig_ConfigStateMachine:test__computeNewConfigWithMeta_RunningToStaging_Success() (gas: 474705)
+CCIPConfig_ConfigStateMachine:test__computeNewConfigWithMeta_StagingToRunning_Success() (gas: 441908)
+CCIPConfig_ConfigStateMachine:test__groupByPluginType_TooManyOCR3Configs_Reverts() (gas: 33848)
+CCIPConfig_ConfigStateMachine:test__groupByPluginType_threeCommitConfigs_Reverts() (gas: 56914)
+CCIPConfig_ConfigStateMachine:test__groupByPluginType_threeExecutionConfigs_Reverts() (gas: 56852)
 CCIPConfig_ConfigStateMachine:test__stateFromConfigLength_Success() (gas: 11719)
-CCIPConfig_ConfigStateMachine:test__validateConfigStateTransition_Success() (gas: 8780)
-CCIPConfig_ConfigStateMachine:test__validateConfigTransition_InitToRunning_Success() (gas: 309744)
-CCIPConfig_ConfigStateMachine:test__validateConfigTransition_InitToRunning_WrongConfigCount_Reverts() (gas: 45887)
+CCIPConfig_ConfigStateMachine:test__validateConfigStateTransition_Success() (gas: 8849)
+CCIPConfig_ConfigStateMachine:test__validateConfigTransition_InitToRunning_Success() (gas: 309722)
+CCIPConfig_ConfigStateMachine:test__validateConfigTransition_InitToRunning_WrongConfigCount_Reverts() (gas: 45865)
 CCIPConfig_ConfigStateMachine:test__validateConfigTransition_NonExistentConfigTransition_Reverts() (gas: 29690)
-CCIPConfig_ConfigStateMachine:test__validateConfigTransition_RunningToStaging_Success() (gas: 370075)
-CCIPConfig_ConfigStateMachine:test__validateConfigTransition_RunningToStaging_WrongConfigCount_Reverts() (gas: 111442)
-CCIPConfig_ConfigStateMachine:test__validateConfigTransition_RunningToStaging_WrongConfigDigestBlueGreen_Reverts() (gas: 145556)
-CCIPConfig_ConfigStateMachine:test__validateConfigTransition_StagingToRunning_Success() (gas: 369851)
-CCIPConfig_ConfigStateMachine:test__validateConfigTransition_StagingToRunning_WrongConfigDigest_Reverts() (gas: 145623)
+CCIPConfig_ConfigStateMachine:test__validateConfigTransition_RunningToStaging_Success() (gas: 370009)
+CCIPConfig_ConfigStateMachine:test__validateConfigTransition_RunningToStaging_WrongConfigCount_Reverts() (gas: 111376)
+CCIPConfig_ConfigStateMachine:test__validateConfigTransition_RunningToStaging_WrongConfigDigestBlueGreen_Reverts() (gas: 145446)
+CCIPConfig_ConfigStateMachine:test__validateConfigTransition_StagingToRunning_Success() (gas: 369785)
+CCIPConfig_ConfigStateMachine:test__validateConfigTransition_StagingToRunning_WrongConfigDigest_Reverts() (gas: 145513)
 CCIPConfig_ConfigStateMachine:test_getCapabilityConfiguration_Success() (gas: 9627)
-CCIPConfig_beforeCapabilityConfigSet:test_beforeCapabilityConfigSet_CommitAndExecConfig_Success() (gas: 1752579)
-CCIPConfig_beforeCapabilityConfigSet:test_beforeCapabilityConfigSet_CommitConfigOnly_Success() (gas: 1019042)
-CCIPConfig_beforeCapabilityConfigSet:test_beforeCapabilityConfigSet_ExecConfigOnly_Success() (gas: 1019073)
+CCIPConfig_beforeCapabilityConfigSet:test_beforeCapabilityConfigSet_CommitAndExecConfig_Success() (gas: 1752535)
+CCIPConfig_beforeCapabilityConfigSet:test_beforeCapabilityConfigSet_CommitConfigOnly_Success() (gas: 1019020)
+CCIPConfig_beforeCapabilityConfigSet:test_beforeCapabilityConfigSet_ExecConfigOnly_Success() (gas: 1019051)
 CCIPConfig_beforeCapabilityConfigSet:test_beforeCapabilityConfigSet_OnlyCapabilitiesRegistryCanCall_Reverts() (gas: 9611)
 CCIPConfig_beforeCapabilityConfigSet:test_beforeCapabilityConfigSet_ZeroLengthConfig_Success() (gas: 15996)
 CCIPConfig_beforeCapabilityConfigSet:test_getCapabilityConfiguration_Success() (gas: 9627)
 CCIPConfig_chainConfig:test__applyChainConfigUpdates_FChainNotPositive_Reverts() (gas: 184771)
-CCIPConfig_chainConfig:test_applyChainConfigUpdates_addChainConfigs_Success() (gas: 344939)
+CCIPConfig_chainConfig:test_applyChainConfigUpdates_addChainConfigs_Success() (gas: 346687)
 CCIPConfig_chainConfig:test_applyChainConfigUpdates_nodeNotInRegistry_Reverts() (gas: 20340)
-CCIPConfig_chainConfig:test_applyChainConfigUpdates_removeChainConfigs_Success() (gas: 267596)
+CCIPConfig_chainConfig:test_applyChainConfigUpdates_removeChainConfigs_Success() (gas: 270334)
 CCIPConfig_chainConfig:test_applyChainConfigUpdates_selectorNotFound_Reverts() (gas: 14819)
 CCIPConfig_chainConfig:test_getCapabilityConfiguration_Success() (gas: 9648)
 CCIPConfig_chainConfig:test_getPaginatedCCIPConfigs_Success() (gas: 370293)
-CCIPConfig_constructor:test_constructor_Success() (gas: 3334093)
-CCIPConfig_constructor:test_constructor_ZeroAddressNotAllowed_Revert() (gas: 61438)
-CCIPConfig_updatePluginConfig:test__updatePluginConfig_InitToRunning_Success() (gas: 1008449)
+CCIPConfig_constructor:test_constructor_Success() (gas: 3344515)
+CCIPConfig_constructor:test_constructor_ZeroAddressNotAllowed_Revert() (gas: 61446)
+CCIPConfig_updatePluginConfig:test__updatePluginConfig_InitToRunning_Success() (gas: 1008427)
 CCIPConfig_updatePluginConfig:test__updatePluginConfig_InvalidConfigLength_Reverts() (gas: 25584)
 CCIPConfig_updatePluginConfig:test__updatePluginConfig_InvalidConfigStateTransition_Reverts() (gas: 21799)
-CCIPConfig_updatePluginConfig:test__updatePluginConfig_RunningToStaging_Success() (gas: 1895621)
-CCIPConfig_updatePluginConfig:test__updatePluginConfig_StagingToRunning_Success() (gas: 2465231)
+CCIPConfig_updatePluginConfig:test__updatePluginConfig_RunningToStaging_Success() (gas: 1895604)
+CCIPConfig_updatePluginConfig:test__updatePluginConfig_StagingToRunning_Success() (gas: 2465196)
 CCIPConfig_updatePluginConfig:test_getCapabilityConfiguration_Success() (gas: 9627)
 CCIPConfig_validateConfig:test__validateConfig_ABIEncodedAddress_OfframpAddressCannotBeZero_Reverts() (gas: 290828)
 CCIPConfig_validateConfig:test__validateConfig_ChainSelectorNotFound_Reverts() (gas: 293559)

contracts/src/v0.8/ccip/capability/CCIPConfig.sol

@@ -101,6 +101,12 @@ contract CCIPConfig is ITypeAndVersion, ICapabilityConfiguration, OwnerIsCreator
     return i_capabilitiesRegistry;
   }
 
+  /// @notice Returns the total number of chains configured.
+  /// @return The total number of chains configured.
+  function getNumChainConfigurations() external view returns (uint256) {
+    return s_remoteChainSelectors.length();
+  }
+
   /// @notice Returns all the chain configurations.
   /// @param pageIndex The page index.
   /// @param pageSize The page size.

contracts/src/v0.8/ccip/test/capability/CCIPConfig.t.sol

@@ -1,7 +1,6 @@
 // SPDX-License-Identifier: BUSL-1.1
 pragma solidity ^0.8.24;
 
-import {SortedSetValidationUtil} from "../../../shared/util/SortedSetValidationUtil.sol";
 import {CCIPConfig} from "../../capability/CCIPConfig.sol";
 import {ICapabilitiesRegistry} from "../../capability/interfaces/ICapabilitiesRegistry.sol";
 import {CCIPConfigTypes} from "../../capability/libraries/CCIPConfigTypes.sol";
@@ -164,6 +163,7 @@ contract CCIPConfig_chainConfig is CCIPConfigSetup {
     assertEq(configs.length, 2, "chain configs length must be 2");
     assertEq(configs[0].chainSelector, 1, "chain selector must match");
     assertEq(configs[1].chainSelector, 2, "chain selector must match");
+    assertEq(s_ccipCC.getNumChainConfigurations(), 2, "total chain configs must be 2");
   }
 
   function test_getPaginatedCCIPConfigs_Success() public {
@@ -252,12 +252,16 @@ contract CCIPConfig_chainConfig is CCIPConfigSetup {
     emit CCIPConfig.ChainConfigSet(2, adds[1].chainConfig);
     s_ccipCC.applyChainConfigUpdates(new uint64[](0), adds);
 
+    assertEq(s_ccipCC.getNumChainConfigurations(), 2, "total chain configs must be 2");
+
     uint64[] memory removes = new uint64[](1);
     removes[0] = uint64(1);
 
     vm.expectEmit();
     emit CCIPConfig.ChainConfigRemoved(1);
     s_ccipCC.applyChainConfigUpdates(removes, new CCIPConfigTypes.ChainConfigInfo[](0));
+
+    assertEq(s_ccipCC.getNumChainConfigurations(), 1, "total chain configs must be 1");
   }
 
   // Reverts.

core/gethwrappers/ccip/generation/generated-wrapper-dependency-versions-do-not-edit.txt

@@ -4,7 +4,7 @@ burn_mint_token_pool: ../../../contracts/solc/v0.8.24/BurnMintTokenPool/BurnMint
 burn_mint_token_pool_and_proxy: ../../../contracts/solc/v0.8.24/BurnMintTokenPoolAndProxy/BurnMintTokenPoolAndProxy.abi ../../../contracts/solc/v0.8.24/BurnMintTokenPoolAndProxy/BurnMintTokenPoolAndProxy.bin 717c079d5d13300cf3c3ee871c6e5bf9af904411f204fb081a9f3b263cca1391
 burn_with_from_mint_token_pool: ../../../contracts/solc/v0.8.24/BurnWithFromMintTokenPool/BurnWithFromMintTokenPool.abi ../../../contracts/solc/v0.8.24/BurnWithFromMintTokenPool/BurnWithFromMintTokenPool.bin 6333d0314d0bd29e75ea5e05fe62a4516ade0c6db91c30b6f93645035db52ed8
 burn_with_from_mint_token_pool_and_proxy: ../../../contracts/solc/v0.8.24/BurnWithFromMintTokenPoolAndProxy/BurnWithFromMintTokenPoolAndProxy.abi ../../../contracts/solc/v0.8.24/BurnWithFromMintTokenPoolAndProxy/BurnWithFromMintTokenPoolAndProxy.bin 08ed1235dda921ce8841b26aa18d0c0f36db4884779dd7670857159801b6d597
-ccip_config: ../../../contracts/solc/v0.8.24/CCIPConfig/CCIPConfig.abi ../../../contracts/solc/v0.8.24/CCIPConfig/CCIPConfig.bin 75955a3dcfd66b308be07eda54d6036cc79e87d3cdcf3c5c3115813c55912af8
+ccip_config: ../../../contracts/solc/v0.8.24/CCIPConfig/CCIPConfig.abi ../../../contracts/solc/v0.8.24/CCIPConfig/CCIPConfig.bin b64994e8719f666101322b32c87d7d569b865be30bc6966aa8751ecb9249bcf4
 ccip_reader_tester: ../../../contracts/solc/v0.8.24/CCIPReaderTester/CCIPReaderTester.abi ../../../contracts/solc/v0.8.24/CCIPReaderTester/CCIPReaderTester.bin 481d461f14c98308cd788b64be1151e92bac6f95ddd55eefc926296454316f13
 commit_store: ../../../contracts/solc/v0.8.24/CommitStore/CommitStore.abi ../../../contracts/solc/v0.8.24/CommitStore/CommitStore.bin 274d87db70b643e00ab0a7e7845bb4b791f3b613bfc87708d33fc5a8369e2a41
 commit_store_helper: ../../../contracts/solc/v0.8.24/CommitStoreHelper/CommitStoreHelper.abi ../../../contracts/solc/v0.8.24/CommitStoreHelper/CommitStoreHelper.bin f7128dcc2ee6dbcbc976288abcc16970ffb19b59412c5202ef6b259d2007f801