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chainId: Hex }) => Promise<{\n isSupported: boolean;\n upgradeContractAddress?: string;\n }>;\n};\n\nconst isAccountUpgraded = async (\n address: string,\n networkClientId: string,\n getCode: (address: string, networkClientId: string) => Promise,\n): Promise<{ isUpgraded: boolean; upgradedAddress: Hex | null }> => {\n const code = await getCode(address, networkClientId);\n if (!code || code === '0x' || code.length <= 2) {\n return { isUpgraded: false, upgradedAddress: null };\n }\n\n if (!code.startsWith(DELEGATION_INDICATOR_PREFIX)) {\n return { isUpgraded: false, upgradedAddress: null };\n }\n\n const expectedLength = DELEGATION_INDICATOR_PREFIX.length + 40; // 0xef0100 + 40 hex chars\n if (code.length !== expectedLength) {\n return { isUpgraded: false, upgradedAddress: null };\n }\n\n // Extract the 20-byte address (40 hex characters after the prefix)\n const upgradedAddress = `0x${code.slice(8, 48)}` as Hex;\n\n return { isUpgraded: true, upgradedAddress };\n};\n\n/**\n * The RPC method handler middleware for `wallet_getAccountUpgradeStatus`\n *\n * @param req - The JSON RPC request's end callback.\n * @param res - The JSON RPC request's pending response object.\n * @param hooks - The hooks required for account upgrade status checking.\n */\nexport async function walletGetAccountUpgradeStatus(\n req: JsonRpcRequest & { origin: string },\n res: PendingJsonRpcResponse,\n hooks: WalletGetAccountUpgradeStatusHooks,\n): Promise {\n const { params, origin } = req;\n\n // Validate parameters using Superstruct\n validateParams(params, GetAccountUpgradeStatusParamsStruct);\n\n const { account, chainId } = params;\n\n // Validate and normalize the account address with authorization check\n const normalizedAccount = await validateAndNormalizeAddress(\n account,\n origin,\n hooks.getPermittedAccountsForOrigin,\n );\n\n // Use current chain ID if not provided\n let targetChainId: Hex;\n if (chainId !== undefined) {\n targetChainId = chainId;\n } else {\n const currentChainIdForDomain = hooks.getCurrentChainIdForDomain(origin);\n if (!currentChainIdForDomain) {\n throw rpcErrors.invalidParams({\n message: `Could not determine current chain ID for origin: ${origin}`,\n });\n }\n targetChainId = currentChainIdForDomain;\n }\n\n const { isSupported } = await hooks.isEip7702Supported({\n address: normalizedAccount,\n chainId: targetChainId,\n });\n\n if (!isSupported) {\n res.result = {\n isSupported,\n account: normalizedAccount,\n isUpgraded: false,\n upgradedAddress: null,\n chainId: targetChainId,\n };\n return;\n }\n\n try {\n // Get the network configuration for the target chain\n const hexChainId = targetChainId;\n const networkClientId =\n hooks.getSelectedNetworkClientIdForChain(hexChainId);\n\n if (!networkClientId) {\n throw rpcErrors.invalidParams({\n message: `Network client ID not found for chain ID ${targetChainId}`,\n });\n }\n\n // Check if the account is upgraded using the EIP7702 utils\n const { isUpgraded, upgradedAddress } = await isAccountUpgraded(\n normalizedAccount,\n networkClientId,\n hooks.getCode,\n );\n\n res.result = {\n isSupported,\n account: normalizedAccount,\n isUpgraded,\n upgradedAddress,\n chainId: targetChainId,\n };\n } catch (error) {\n // Re-throw RPC errors as-is\n if (error instanceof JsonRpcError) {\n throw error;\n }\n throw rpcErrors.internal({\n message: `Failed to get account upgrade status: ${getErrorMessage(error)}`,\n });\n }\n}\n"]}