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{ Web3Provider } from '@ethersproject/providers';\nimport type {\n AccountsControllerSelectedEvmAccountChangeEvent,\n AccountsControllerGetSelectedAccountAction,\n AccountsControllerListAccountsAction,\n} from '@metamask/accounts-controller';\nimport type {\n ControllerStateChangeEvent,\n ControllerGetStateAction,\n StateMetadata,\n} from '@metamask/base-controller';\nimport {\n query,\n safelyExecuteWithTimeout,\n toChecksumHexAddress,\n} from '@metamask/controller-utils';\nimport EthQuery from '@metamask/eth-query';\nimport type {\n KeyringControllerGetStateAction,\n KeyringControllerLockEvent,\n KeyringControllerUnlockEvent,\n} from '@metamask/keyring-controller';\nimport type { InternalAccount } from '@metamask/keyring-internal-api';\nimport type { Messenger } from '@metamask/messenger';\nimport type {\n NetworkClient,\n NetworkClientId,\n NetworkControllerGetNetworkClientByIdAction,\n NetworkControllerGetStateAction,\n NetworkControllerNetworkAddedEvent,\n} from '@metamask/network-controller';\nimport type {\n NetworkEnablementControllerGetStateAction,\n NetworkEnablementControllerListPopularEvmNetworksAction,\n} from '@metamask/network-enablement-controller';\nimport { StaticIntervalPollingController } from '@metamask/polling-controller';\nimport type {\n TransactionControllerTransactionConfirmedEvent,\n TransactionControllerUnapprovedTransactionAddedEvent,\n TransactionMeta,\n} from '@metamask/transaction-controller';\nimport { assert, KnownCaipNamespace } from '@metamask/utils';\nimport type { Hex } from '@metamask/utils';\nimport { Mutex } from 'async-mutex';\nimport { cloneDeep, isEqual } from 'lodash';\n\nimport type { AccountTrackerControllerMethodActions } from './AccountTrackerController-method-action-types';\nimport { STAKING_CONTRACT_ADDRESS_BY_CHAINID } from './AssetsContractController';\nimport type {\n AssetsContractController,\n StakedBalance,\n} from './AssetsContractController';\nimport { shouldIncludeNativeToken } from './constants';\nimport { AccountsApiBalanceFetcher } from './multi-chain-accounts-service/api-balance-fetcher';\nimport type {\n BalanceFetcher,\n BalanceFetchResult,\n ProcessedBalance,\n} from './multi-chain-accounts-service/api-balance-fetcher';\nimport { RpcBalanceFetcher } from './rpc-service/rpc-balance-fetcher';\n\n/**\n * The name of the {@link AccountTrackerController}.\n */\nconst controllerName = 'AccountTrackerController';\n\nexport type ChainIdHex = Hex;\nexport type ChecksumAddress = Hex;\n\nconst ZERO_ADDRESS =\n '0x0000000000000000000000000000000000000000' as ChecksumAddress;\n\n/**\n * Creates an RPC balance fetcher configured for AccountTracker use case.\n * Returns only native balances and staked balances (no token balances).\n *\n * @param getProvider - Function to get Web3Provider for a given chain ID\n * @param getNetworkClient - Function to get NetworkClient for a given chain ID\n * @param includeStakedAssets - Whether to include staked assets in the fetch\n * @returns BalanceFetcher configured to fetch only native and optionally staked balances\n */\nfunction createAccountTrackerRpcBalanceFetcher(\n getProvider: (chainId: Hex) => Web3Provider,\n getNetworkClient: (chainId: Hex) => NetworkClient,\n includeStakedAssets: boolean,\n): BalanceFetcher {\n // Provide empty tokens state to ensure only native and staked balances are fetched\n const getEmptyTokensState = (): {\n allTokens: Record;\n allDetectedTokens: Record;\n } => ({\n allTokens: {},\n allDetectedTokens: {},\n });\n\n const rpcBalanceFetcher = new RpcBalanceFetcher(\n getProvider,\n getNetworkClient,\n getEmptyTokensState,\n );\n\n // Wrap the RpcBalanceFetcher to filter staked balances when not needed\n return {\n supports(_chainId: ChainIdHex): boolean {\n return rpcBalanceFetcher.supports();\n },\n\n async fetch(\n params: Parameters[0],\n ): Promise {\n const result = await rpcBalanceFetcher.fetch(params);\n\n if (!includeStakedAssets) {\n // Filter out staked balances from the results\n return {\n balances: result.balances.filter(\n (balance) => balance.token === ZERO_ADDRESS,\n ),\n unprocessedChainIds: result.unprocessedChainIds,\n };\n }\n\n return result;\n },\n };\n}\n\n/**\n * AccountInformation\n *\n * Account information object\n *\n * balance - Hex string of an account balance in wei\n *\n * stakedBalance - Hex string of an account staked balance in wei\n */\nexport type AccountInformation = {\n balance: string;\n stakedBalance?: string;\n};\n\n/**\n * AccountTrackerControllerState\n *\n * Account tracker controller state\n *\n * accountsByChainId - Map of addresses to account information by chain\n */\nexport type AccountTrackerControllerState = {\n accountsByChainId: Record;\n};\n\nconst accountTrackerMetadata: StateMetadata = {\n accountsByChainId: {\n includeInStateLogs: false,\n persist: true,\n includeInDebugSnapshot: false,\n usedInUi: true,\n },\n};\n\n/**\n * The action that can be performed to get the state of the {@link AccountTrackerController}.\n */\nexport type AccountTrackerControllerGetStateAction = ControllerGetStateAction<\n typeof controllerName,\n AccountTrackerControllerState\n>;\n\n/**\n * The actions that can be performed using the {@link AccountTrackerController}.\n */\nexport type AccountTrackerControllerActions =\n | AccountTrackerControllerGetStateAction\n | AccountTrackerControllerMethodActions;\n\n/**\n * The messenger of the {@link AccountTrackerController} for communication.\n */\nexport type AllowedActions =\n | AccountsControllerListAccountsAction\n | {\n type: 'PreferencesController:getState';\n handler: () => { isMultiAccountBalancesEnabled: boolean };\n }\n | AccountsControllerGetSelectedAccountAction\n | NetworkControllerGetStateAction\n | NetworkControllerGetNetworkClientByIdAction\n | NetworkEnablementControllerGetStateAction\n | NetworkEnablementControllerListPopularEvmNetworksAction\n | KeyringControllerGetStateAction;\n\n/**\n * The event that {@link AccountTrackerController} can emit.\n */\nexport type AccountTrackerControllerStateChangeEvent =\n ControllerStateChangeEvent<\n typeof controllerName,\n AccountTrackerControllerState\n >;\n\n/**\n * The events that {@link AccountTrackerController} can emit.\n */\nexport type AccountTrackerControllerEvents =\n AccountTrackerControllerStateChangeEvent;\n\n/**\n * The external events available to the {@link AccountTrackerController}.\n */\nexport type AllowedEvents =\n | AccountsControllerSelectedEvmAccountChangeEvent\n | TransactionControllerUnapprovedTransactionAddedEvent\n | TransactionControllerTransactionConfirmedEvent\n | NetworkControllerNetworkAddedEvent\n | KeyringControllerLockEvent\n | KeyringControllerUnlockEvent;\n\n/**\n * The messenger of the {@link AccountTrackerController}.\n */\nexport type AccountTrackerControllerMessenger = Messenger<\n typeof controllerName,\n AccountTrackerControllerActions | AllowedActions,\n AccountTrackerControllerEvents | AllowedEvents\n>;\n\n/** The input to start polling for the {@link AccountTrackerController} */\ntype AccountTrackerPollingInput = {\n networkClientIds: NetworkClientId[];\n queryAllAccounts?: boolean;\n};\n\nconst MESSENGER_EXPOSED_METHODS = [\n 'updateNativeBalances',\n 'updateStakedBalances',\n] as const;\n\n/**\n * Controller that tracks the network balances for all user accounts.\n */\nexport class AccountTrackerController extends StaticIntervalPollingController()<\n typeof controllerName,\n AccountTrackerControllerState,\n AccountTrackerControllerMessenger\n> {\n readonly #refreshMutex = new Mutex();\n\n readonly #includeStakedAssets: boolean;\n\n readonly #accountsApiChainIds: () => ChainIdHex[];\n\n readonly #getStakedBalanceForChain: AssetsContractController['getStakedBalanceForChain'];\n\n readonly #balanceFetchers: BalanceFetcher[];\n\n readonly #fetchingEnabled: () => boolean;\n\n readonly #isOnboarded: () => boolean;\n\n readonly #isHomepageSectionsV1Enabled: () => boolean;\n\n /** Track if the keyring is locked */\n #isLocked = true;\n\n /**\n * Creates an AccountTracker instance.\n *\n * @param options - The controller options.\n * @param options.interval - Polling interval used to fetch new account balances.\n * @param options.state - Initial state to set on this controller.\n * @param options.messenger - The controller messenger.\n * @param options.getStakedBalanceForChain - The function to get the staked native asset balance for a chain.\n * @param options.includeStakedAssets - Whether to include staked assets in the account balances.\n * @param options.accountsApiChainIds - Function that returns array of chainIds that should use Accounts-API strategy (if supported by API).\n * @param options.allowExternalServices - Disable external HTTP calls (privacy / offline mode).\n * @param options.fetchingEnabled - Function that returns whether the controller is fetching enabled.\n * @param options.isOnboarded - Whether the user has completed onboarding. If false, balance updates are skipped.\n * @param options.isHomepageSectionsV1Enabled - Whether the homepage sections v1 is enabled.\n */\n constructor({\n interval = 10000,\n state,\n messenger,\n getStakedBalanceForChain,\n includeStakedAssets = false,\n accountsApiChainIds = (): ChainIdHex[] => [],\n allowExternalServices = (): boolean => true,\n fetchingEnabled = (): boolean => true,\n isOnboarded = (): boolean => true,\n isHomepageSectionsV1Enabled = (): boolean => false,\n }: {\n interval?: number;\n state?: Partial;\n messenger: AccountTrackerControllerMessenger;\n getStakedBalanceForChain: AssetsContractController['getStakedBalanceForChain'];\n includeStakedAssets?: boolean;\n accountsApiChainIds?: () => ChainIdHex[];\n isHomepageSectionsV1Enabled?: () => boolean;\n allowExternalServices?: () => boolean;\n fetchingEnabled?: () => boolean;\n isOnboarded?: () => boolean;\n }) {\n const { selectedNetworkClientId } = messenger.call(\n 'NetworkController:getState',\n );\n const {\n configuration: { chainId },\n } = messenger.call(\n 'NetworkController:getNetworkClientById',\n selectedNetworkClientId,\n );\n super({\n name: controllerName,\n messenger,\n state: {\n accountsByChainId: {\n [chainId]: {},\n },\n ...state,\n },\n metadata: accountTrackerMetadata,\n });\n this.#getStakedBalanceForChain = getStakedBalanceForChain;\n\n this.#includeStakedAssets = includeStakedAssets;\n this.#accountsApiChainIds = accountsApiChainIds;\n this.#isHomepageSectionsV1Enabled = isHomepageSectionsV1Enabled;\n\n // Initialize balance fetchers - Strategy order: API first, then RPC fallback\n this.#balanceFetchers = [\n ...(accountsApiChainIds().length > 0 && allowExternalServices()\n ? [this.#createAccountsApiFetcher()]\n : []),\n createAccountTrackerRpcBalanceFetcher(\n this.#getProvider,\n this.#getNetworkClient,\n this.#includeStakedAssets,\n ),\n ];\n\n this.#fetchingEnabled = fetchingEnabled;\n this.#isOnboarded = isOnboarded;\n\n const { isUnlocked } = this.messenger.call('KeyringController:getState');\n this.#isLocked = !isUnlocked;\n\n this.setIntervalLength(interval);\n\n this.messenger.subscribe(\n 'AccountsController:selectedEvmAccountChange',\n (newAddress, prevAddress) => {\n if (newAddress !== prevAddress) {\n // Making an async call for this new event\n // eslint-disable-next-line @typescript-eslint/no-floating-promises\n this.refresh(this.#getNetworkClientIds());\n }\n },\n (event): string => event.address,\n );\n\n this.messenger.subscribe(\n 'NetworkController:networkAdded',\n (networkConfiguration) => {\n const { networkClientId } =\n networkConfiguration.rpcEndpoints[\n networkConfiguration.defaultRpcEndpointIndex\n ];\n this.refresh([networkClientId]).catch(() => {\n // Silently handle refresh errors\n });\n },\n );\n\n this.messenger.subscribe('KeyringController:unlock', () => {\n this.#isLocked = false;\n const networkClientIds = this.#getNetworkClientIds();\n this.refresh(networkClientIds).catch((error) => {\n console.error('Error refreshing balances after keyring unlock:', error);\n });\n });\n\n this.messenger.subscribe('KeyringController:lock', () => {\n this.#isLocked = true;\n });\n\n this.messenger.subscribe(\n 'TransactionController:unapprovedTransactionAdded',\n (transactionMeta: TransactionMeta) => {\n const addresses = [transactionMeta.txParams.from];\n if (transactionMeta.txParams.to) {\n addresses.push(transactionMeta.txParams.to);\n }\n this.refreshAddresses({\n networkClientIds: [transactionMeta.networkClientId],\n addresses,\n }).catch(() => {\n // Silently handle refresh errors\n });\n },\n );\n\n this.messenger.subscribe(\n 'TransactionController:transactionConfirmed',\n (transactionMeta: TransactionMeta) => {\n const addresses = [transactionMeta.txParams.from];\n if (transactionMeta.txParams.to) {\n addresses.push(transactionMeta.txParams.to);\n }\n this.refreshAddresses({\n networkClientIds: [transactionMeta.networkClientId],\n addresses,\n }).catch(() => {\n // Silently handle refresh errors\n });\n },\n );\n\n messenger.registerMethodActionHandlers(this, MESSENGER_EXPOSED_METHODS);\n }\n\n /**\n * Whether the controller is active (keyring is unlocked and user is onboarded).\n * When locked or not onboarded, balance updates should be skipped.\n *\n * @returns Whether the controller should perform balance updates.\n */\n get isActive(): boolean {\n return !this.#isLocked && this.#isOnboarded();\n }\n\n #syncAccounts(newChainIds: string[]): void {\n const accountsByChainId = cloneDeep(this.state.accountsByChainId);\n const { selectedNetworkClientId } = this.messenger.call(\n 'NetworkController:getState',\n );\n const {\n configuration: { chainId: currentChainId },\n } = this.messenger.call(\n 'NetworkController:getNetworkClientById',\n selectedNetworkClientId,\n );\n\n const existing = Object.keys(accountsByChainId?.[currentChainId] ?? {});\n\n // Initialize new chain IDs if they don't exist\n newChainIds.forEach((newChainId) => {\n if (!accountsByChainId[newChainId]) {\n accountsByChainId[newChainId] = {};\n existing.forEach((address) => {\n accountsByChainId[newChainId][address] = { balance: '0x0' };\n });\n }\n });\n\n // Note: The address from the preferences controller are checksummed\n // The addresses from the accounts controller are lowercased\n const addresses = Object.values(\n this.messenger\n .call('AccountsController:listAccounts')\n .map((internalAccount) =>\n toChecksumHexAddress(internalAccount.address),\n ),\n );\n const newAddresses = addresses.filter(\n (address) => !existing.includes(address),\n );\n const oldAddresses = existing.filter(\n (address) => !addresses.includes(address),\n );\n Object.keys(accountsByChainId).forEach((chainId) => {\n newAddresses.forEach((address) => {\n accountsByChainId[chainId][address] = {\n balance: '0x0',\n };\n });\n });\n\n Object.keys(accountsByChainId).forEach((chainId) => {\n oldAddresses.forEach((address) => {\n delete accountsByChainId[chainId][address];\n });\n });\n\n if (!isEqual(this.state.accountsByChainId, accountsByChainId)) {\n this.update((state) => {\n state.accountsByChainId = accountsByChainId;\n });\n }\n }\n\n readonly #getProvider = (chainId: Hex): Web3Provider => {\n const { networkConfigurationsByChainId } = this.messenger.call(\n 'NetworkController:getState',\n );\n const networkConfig = networkConfigurationsByChainId[chainId];\n const { networkClientId } =\n networkConfig.rpcEndpoints[networkConfig.defaultRpcEndpointIndex];\n const client = this.messenger.call(\n 'NetworkController:getNetworkClientById',\n networkClientId,\n );\n return new Web3Provider(client.provider);\n };\n\n readonly #getNetworkClient = (chainId: Hex): NetworkClient => {\n const { networkConfigurationsByChainId } = this.messenger.call(\n 'NetworkController:getState',\n );\n const networkConfig = networkConfigurationsByChainId[chainId];\n const { networkClientId } =\n networkConfig.rpcEndpoints[networkConfig.defaultRpcEndpointIndex];\n return this.messenger.call(\n 'NetworkController:getNetworkClientById',\n networkClientId,\n );\n };\n\n /**\n * Creates an AccountsApiBalanceFetcher that only supports chains in the accountsApiChainIds array\n *\n * @returns A BalanceFetcher that wraps AccountsApiBalanceFetcher with chainId filtering\n */\n readonly #createAccountsApiFetcher = (): BalanceFetcher => {\n const originalFetcher = new AccountsApiBalanceFetcher(\n 'extension',\n this.#getProvider,\n );\n\n return {\n supports: (chainId: ChainIdHex): boolean => {\n // Only support chains that are both:\n // 1. In our specified accountsApiChainIds array\n // 2. Actually supported by the AccountsApi\n return (\n this.#accountsApiChainIds().includes(chainId) &&\n originalFetcher.supports(chainId)\n );\n },\n fetch: originalFetcher.fetch.bind(originalFetcher),\n };\n };\n\n /**\n * Resolves a networkClientId to a network client config\n * or globally selected network config if not provided\n *\n * @param networkClientId - Optional networkClientId to fetch a network client with\n * @returns network client config\n */\n #getCorrectNetworkClient(networkClientId?: NetworkClientId): {\n chainId: Hex;\n provider: NetworkClient['provider'];\n ethQuery: EthQuery;\n blockTracker: NetworkClient['blockTracker'];\n } {\n const selectedNetworkClientId =\n networkClientId ??\n this.messenger.call('NetworkController:getState').selectedNetworkClientId;\n const {\n configuration: { chainId },\n provider,\n blockTracker,\n } = this.messenger.call(\n 'NetworkController:getNetworkClientById',\n selectedNetworkClientId,\n );\n\n return {\n chainId,\n provider,\n ethQuery: new EthQuery(provider),\n blockTracker,\n };\n }\n\n /**\n * Retrieves the list of network client IDs.\n *\n * @returns An array of network client IDs.\n */\n #getNetworkClientIds(): NetworkClientId[] {\n const { networkConfigurationsByChainId } = this.messenger.call(\n 'NetworkController:getState',\n );\n\n if (this.#isHomepageSectionsV1Enabled()) {\n const popularEvmChainIds = this.messenger.call(\n 'NetworkEnablementController:listPopularEvmNetworks',\n );\n return popularEvmChainIds\n .map((hexChainId) => {\n const networkConfig = networkConfigurationsByChainId[hexChainId];\n return networkConfig?.rpcEndpoints[\n networkConfig.defaultRpcEndpointIndex\n ]?.networkClientId;\n })\n .filter((id): id is NetworkClientId => id !== undefined);\n }\n\n const { enabledNetworkMap } = this.messenger.call(\n 'NetworkEnablementController:getState',\n );\n\n const evmEnabledStorageKeys = enabledNetworkMap[KnownCaipNamespace.Eip155]\n ? Object.keys(enabledNetworkMap[KnownCaipNamespace.Eip155])\n : [];\n\n return evmEnabledStorageKeys\n .map((hexChainId) => {\n const networkConfig = networkConfigurationsByChainId[hexChainId as Hex];\n return networkConfig?.rpcEndpoints[\n networkConfig.defaultRpcEndpointIndex\n ]?.networkClientId;\n })\n .filter((id): id is NetworkClientId => id !== undefined);\n }\n\n /**\n * Refreshes the balances of the accounts using the networkClientId\n *\n * @param input - The input for the poll.\n * @param input.networkClientIds - The network client IDs used to get balances.\n * @param input.queryAllAccounts - Whether to query all accounts or just the selected account\n */\n async _executePoll({\n networkClientIds,\n queryAllAccounts = false,\n }: AccountTrackerPollingInput): Promise {\n // TODO: Either fix this lint violation or explain why it's necessary to ignore.\n // eslint-disable-next-line @typescript-eslint/no-floating-promises\n this.refresh(networkClientIds, queryAllAccounts);\n }\n\n /**\n * Refreshes the balances of the accounts depending on the multi-account setting.\n * If multi-account is disabled, only updates the selected account balance.\n * If multi-account is enabled, updates balances for all accounts.\n *\n * @param networkClientIds - Optional network client IDs to fetch a network client with\n * @param queryAllAccounts - Whether to query all accounts or just the selected account\n */\n async refresh(\n networkClientIds: NetworkClientId[],\n queryAllAccounts: boolean = false,\n ): Promise {\n const selectedAccount = this.messenger.call(\n 'AccountsController:getSelectedAccount',\n );\n const allAccounts = this.messenger.call('AccountsController:listAccounts');\n const { isMultiAccountBalancesEnabled } = this.messenger.call(\n 'PreferencesController:getState',\n );\n\n await this.#refreshAccounts({\n networkClientIds,\n queryAllAccounts: queryAllAccounts ?? isMultiAccountBalancesEnabled,\n selectedAccount: toChecksumHexAddress(\n selectedAccount.address,\n ) as ChecksumAddress,\n allAccounts,\n });\n }\n\n async refreshAddresses({\n networkClientIds,\n addresses,\n }: {\n networkClientIds: NetworkClientId[];\n addresses: string[];\n }): Promise {\n const checksummedAddresses = addresses.map((address) =>\n toChecksumHexAddress(address),\n );\n\n const accounts = this.messenger\n .call('AccountsController:listAccounts')\n .filter((account) =>\n checksummedAddresses.includes(toChecksumHexAddress(account.address)),\n );\n\n await this.#refreshAccounts({\n networkClientIds,\n queryAllAccounts: true,\n selectedAccount: '0x0',\n allAccounts: accounts,\n });\n }\n\n async #refreshAccounts({\n networkClientIds,\n queryAllAccounts,\n selectedAccount,\n allAccounts,\n }: {\n networkClientIds: NetworkClientId[];\n queryAllAccounts: boolean;\n selectedAccount: ChecksumAddress;\n allAccounts: InternalAccount[];\n }): Promise {\n const releaseLock = await this.#refreshMutex.acquire();\n try {\n const chainIds = networkClientIds.map((networkClientId) => {\n const { chainId } = this.#getCorrectNetworkClient(networkClientId);\n return chainId;\n });\n\n this.#syncAccounts(chainIds);\n\n if (!this.#fetchingEnabled() || !this.isActive) {\n return;\n }\n\n // Use balance fetchers with fallback strategy\n const aggregated: ProcessedBalance[] = [];\n let remainingChains = [...chainIds] as ChainIdHex[];\n\n // Temporary normalization to lowercase for balance fetching to match TokenBalancesController and enable HTTP caching\n const lowerCaseSelectedAccount =\n selectedAccount.toLowerCase() as ChecksumAddress;\n const lowerCaseAllAccounts = allAccounts.map((account) => ({\n ...account,\n address: account.address.toLowerCase(),\n }));\n\n // Try each fetcher in order, removing successfully processed chains\n for (const fetcher of this.#balanceFetchers) {\n const supportedChains = remainingChains.filter((chainId) =>\n fetcher.supports(chainId),\n );\n if (!supportedChains.length) {\n continue;\n }\n\n try {\n const result = await fetcher.fetch({\n chainIds: supportedChains,\n queryAllAccounts,\n selectedAccount: lowerCaseSelectedAccount,\n allAccounts: lowerCaseAllAccounts,\n });\n\n if (result.balances && result.balances.length > 0) {\n aggregated.push(...result.balances);\n // Remove chains that were successfully processed\n const processedChains = new Set(\n result.balances.map((b) => b.chainId),\n );\n remainingChains = remainingChains.filter(\n (chain) => !processedChains.has(chain),\n );\n }\n\n // Add unprocessed chains back to remainingChains for next fetcher\n if (\n result.unprocessedChainIds &&\n result.unprocessedChainIds.length > 0\n ) {\n // Only add chains that were originally requested and aren't already in remainingChains\n const currentRemainingChains = remainingChains;\n const chainsToAdd = result.unprocessedChainIds.filter(\n (chainId) =>\n supportedChains.includes(chainId) &&\n !currentRemainingChains.includes(chainId),\n );\n remainingChains.push(...chainsToAdd);\n }\n } catch (error) {\n console.warn(\n `Balance fetcher failed for chains ${supportedChains.join(', ')}: ${String(error)}`,\n );\n // Continue to next fetcher (fallback)\n }\n\n // If all chains have been processed, break early\n if (remainingChains.length === 0) {\n break;\n }\n }\n\n // Build a _copy_ of the current state and track whether anything changed\n const nextAccountsByChainId: AccountTrackerControllerState['accountsByChainId'] =\n cloneDeep(this.state.accountsByChainId);\n let hasChanges = false;\n\n // Process the aggregated balance results\n const stakedBalancesByChainAndAddress: Record<\n string,\n Record\n > = {};\n\n aggregated.forEach(({ success, value, account, token, chainId }) => {\n if (success && value !== undefined) {\n const checksumAddress = toChecksumHexAddress(account);\n const hexValue = `0x${value.toString(16)}`;\n\n if (token === ZERO_ADDRESS) {\n // Native balance\n // Ensure the account entry exists before accessing it\n if (!nextAccountsByChainId[chainId]) {\n nextAccountsByChainId[chainId] = {};\n }\n if (!nextAccountsByChainId[chainId][checksumAddress]) {\n nextAccountsByChainId[chainId][checksumAddress] = {\n balance: '0x0',\n };\n }\n\n if (\n nextAccountsByChainId[chainId][checksumAddress].balance !==\n hexValue\n ) {\n nextAccountsByChainId[chainId][checksumAddress].balance =\n hexValue;\n hasChanges = true;\n }\n } else if (\n STAKING_CONTRACT_ADDRESS_BY_CHAINID[chainId]?.toLowerCase() ===\n token.toLowerCase()\n ) {\n // Staked balance (from staking contract address)\n if (!stakedBalancesByChainAndAddress[chainId]) {\n stakedBalancesByChainAndAddress[chainId] = {};\n }\n stakedBalancesByChainAndAddress[chainId][checksumAddress] =\n hexValue;\n }\n }\n });\n\n // Apply staked balances\n Object.entries(stakedBalancesByChainAndAddress).forEach(\n ([chainId, balancesByAddress]) => {\n Object.entries(balancesByAddress).forEach(\n ([address, stakedBalance]) => {\n // Ensure account structure exists\n if (!nextAccountsByChainId[chainId]) {\n nextAccountsByChainId[chainId] = {};\n }\n if (!nextAccountsByChainId[chainId][address]) {\n nextAccountsByChainId[chainId][address] = { balance: '0x0' };\n }\n if (\n nextAccountsByChainId[chainId][address].stakedBalance !==\n stakedBalance\n ) {\n nextAccountsByChainId[chainId][address].stakedBalance =\n stakedBalance;\n hasChanges = true;\n }\n },\n );\n },\n );\n\n // Only update state if something changed\n if (hasChanges) {\n this.update((state) => {\n state.accountsByChainId = nextAccountsByChainId;\n });\n }\n } finally {\n releaseLock();\n }\n }\n\n /**\n * Sync accounts balances with some additional addresses.\n *\n * @param addresses - the additional addresses, may be hardware wallet addresses.\n * @param networkClientId - Optional networkClientId to fetch a network client with.\n * @returns accounts - addresses with synced balance\n */\n async syncBalanceWithAddresses(\n addresses: string[],\n networkClientId?: NetworkClientId,\n ): Promise<\n Record\n > {\n // Skip balance fetching if locked or not onboarded to avoid unnecessary RPC calls\n if (!this.isActive) {\n return {};\n }\n\n const { ethQuery, chainId } =\n this.#getCorrectNetworkClient(networkClientId);\n\n // Skip native token fetching for chains that return arbitrary large numbers\n if (!shouldIncludeNativeToken(chainId)) {\n // Return empty balances for chains that skip native token fetching\n return addresses.reduce<\n Record\n >((acc, address) => {\n acc[address] = { balance: '0x0' };\n return acc;\n }, {});\n }\n\n // TODO: This should use multicall when enabled by the user.\n return await Promise.all(\n addresses.map(\n (address): Promise<[string, string, StakedBalance] | undefined> => {\n return safelyExecuteWithTimeout(async () => {\n assert(ethQuery, 'Provider not set.');\n const balance = await query(ethQuery, 'getBalance', [address]);\n\n let stakedBalance: StakedBalance;\n if (this.#includeStakedAssets) {\n stakedBalance = (\n await this.#getStakedBalanceForChain([address], networkClientId)\n )[address];\n }\n return [address, balance, stakedBalance];\n });\n },\n ),\n ).then((value) => {\n return value.reduce((obj, item) => {\n if (!item) {\n return obj;\n }\n\n const [address, balance, stakedBalance] = item;\n return {\n ...obj,\n [address]: {\n balance,\n stakedBalance,\n },\n };\n }, {});\n });\n }\n\n /**\n * Updates the balances of multiple native tokens in a single batch operation.\n * This is more efficient than calling updateNativeToken multiple times as it\n * triggers only one state update.\n *\n * @param balances - Array of balance updates, each containing address, chainId, and balance.\n */\n updateNativeBalances(\n balances: { address: string; chainId: Hex; balance: Hex }[],\n ): void {\n const nextAccountsByChainId = cloneDeep(this.state.accountsByChainId);\n let hasChanges = false;\n\n balances.forEach(({ address, chainId, balance }) => {\n const checksumAddress = toChecksumHexAddress(address);\n\n // Ensure the chainId exists in the state\n if (!nextAccountsByChainId[chainId]) {\n nextAccountsByChainId[chainId] = {};\n hasChanges = true;\n }\n\n // Check if the address exists for this chain\n const accountExists = Boolean(\n nextAccountsByChainId[chainId][checksumAddress],\n );\n\n // Ensure the address exists for this chain\n if (!accountExists) {\n nextAccountsByChainId[chainId][checksumAddress] = {\n balance: '0x0',\n };\n hasChanges = true;\n }\n\n // Only update the balance if it has changed, or if this is a new account\n const currentBalance =\n nextAccountsByChainId[chainId][checksumAddress].balance;\n if (!accountExists || currentBalance !== balance) {\n nextAccountsByChainId[chainId][checksumAddress].balance = balance;\n hasChanges = true;\n }\n });\n\n // Only call update if there are actual changes\n if (hasChanges) {\n this.update((state) => {\n state.accountsByChainId = nextAccountsByChainId;\n });\n }\n }\n\n /**\n * Updates the staked balances of multiple accounts in a single batch operation.\n * This is more efficient than updating staked balances individually as it\n * triggers only one state update.\n *\n * @param stakedBalances - Array of staked balance updates, each containing address, chainId, and stakedBalance.\n */\n updateStakedBalances(\n stakedBalances: {\n address: string;\n chainId: Hex;\n stakedBalance: StakedBalance;\n }[],\n ): void {\n const nextAccountsByChainId = cloneDeep(this.state.accountsByChainId);\n let hasChanges = false;\n\n stakedBalances.forEach(({ address, chainId, stakedBalance }) => {\n const checksumAddress = toChecksumHexAddress(address);\n\n // Ensure the chainId exists in the state\n if (!nextAccountsByChainId[chainId]) {\n nextAccountsByChainId[chainId] = {};\n hasChanges = true;\n }\n\n // Check if the address exists for this chain\n const accountExists = Boolean(\n nextAccountsByChainId[chainId][checksumAddress],\n );\n\n // Ensure the address exists for this chain\n if (!accountExists) {\n nextAccountsByChainId[chainId][checksumAddress] = {\n balance: '0x0',\n };\n hasChanges = true;\n }\n\n // Only update the staked balance if it has changed, or if this is a new account\n const currentStakedBalance =\n nextAccountsByChainId[chainId][checksumAddress].stakedBalance;\n if (!accountExists || !isEqual(currentStakedBalance, stakedBalance)) {\n nextAccountsByChainId[chainId][checksumAddress].stakedBalance =\n stakedBalance;\n hasChanges = true;\n }\n });\n\n // Only call update if there are actual changes\n if (hasChanges) {\n this.update((state) => {\n state.accountsByChainId = nextAccountsByChainId;\n });\n }\n }\n}\n\nexport default AccountTrackerController;\n"]}