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type {\n ControllerGetStateAction,\n ControllerStateChangeEvent,\n} from '@metamask/base-controller';\nimport type { Messenger } from '@metamask/messenger';\nimport { StaticIntervalPollingController } from '@metamask/polling-controller';\nimport type { RemoteFeatureFlagControllerState } from '@metamask/remote-feature-flag-controller';\nimport type { Json } from '@metamask/utils';\n\nimport type {\n AbstractConfigRegistryApiService,\n FetchConfigResult,\n} from './config-registry-api-service';\nimport {\n ConfigRegistryApiService,\n filterNetworks,\n} from './config-registry-api-service';\nimport { isConfigRegistryApiEnabled } from './utils/feature-flags';\n\nconst controllerName = 'ConfigRegistryController';\n\nexport const DEFAULT_POLLING_INTERVAL = 24 * 60 * 60 * 1000;\n\nexport type RegistryConfigEntry = {\n key: string;\n value: Json;\n metadata?: Json;\n};\n\nexport type ConfigRegistryState = {\n configs: {\n networks?: Record;\n };\n version: string | null;\n lastFetched: number | null;\n fetchError: string | null;\n etag: string | null;\n};\n\nconst stateMetadata = {\n configs: {\n persist: true,\n anonymous: false,\n includeInStateLogs: false,\n includeInDebugSnapshot: true,\n usedInUi: true,\n },\n version: {\n persist: true,\n anonymous: false,\n includeInStateLogs: true,\n includeInDebugSnapshot: true,\n usedInUi: false,\n },\n lastFetched: {\n persist: true,\n anonymous: false,\n includeInStateLogs: true,\n includeInDebugSnapshot: true,\n usedInUi: false,\n },\n fetchError: {\n persist: true,\n anonymous: false,\n includeInStateLogs: true,\n includeInDebugSnapshot: true,\n usedInUi: false,\n },\n etag: {\n persist: true,\n anonymous: false,\n includeInStateLogs: false,\n includeInDebugSnapshot: false,\n usedInUi: false,\n },\n};\n\nconst DEFAULT_FALLBACK_CONFIG: Record = {};\n\ntype ConfigRegistryPollingInput = Record;\n\nexport type ConfigRegistryControllerStateChangeEvent =\n ControllerStateChangeEvent;\n\nexport type ConfigRegistryControllerGetStateAction = ControllerGetStateAction<\n typeof controllerName,\n ConfigRegistryState\n>;\n\nexport type ConfigRegistryControllerGetConfigAction = {\n type: `${typeof controllerName}:getConfig`;\n handler: ConfigRegistryController['getConfig'];\n};\n\nexport type ConfigRegistryControllerSetConfigAction = {\n type: `${typeof controllerName}:setConfig`;\n handler: ConfigRegistryController['setConfig'];\n};\n\nexport type ConfigRegistryControllerGetAllConfigsAction = {\n type: `${typeof controllerName}:getAllConfigs`;\n handler: ConfigRegistryController['getAllConfigs'];\n};\n\nexport type ConfigRegistryControllerStartPollingAction = {\n type: `${typeof controllerName}:startPolling`;\n handler: (input: ConfigRegistryPollingInput) => string;\n};\n\nexport type ConfigRegistryControllerStopPollingAction = {\n type: `${typeof controllerName}:stopPolling`;\n handler: () => void;\n};\n\nexport type ConfigRegistryControllerActions =\n | ConfigRegistryControllerGetStateAction\n | ConfigRegistryControllerGetConfigAction\n | ConfigRegistryControllerSetConfigAction\n | ConfigRegistryControllerGetAllConfigsAction\n | ConfigRegistryControllerStartPollingAction\n | ConfigRegistryControllerStopPollingAction\n | {\n type: 'RemoteFeatureFlagController:getState';\n handler: () => RemoteFeatureFlagControllerState;\n };\n\nexport type ConfigRegistryControllerEvents =\n ConfigRegistryControllerStateChangeEvent;\n\nexport type ConfigRegistryMessenger = Messenger<\n typeof controllerName,\n ConfigRegistryControllerActions,\n ConfigRegistryControllerEvents\n>;\n\nexport type ConfigRegistryControllerOptions = {\n messenger: ConfigRegistryMessenger;\n state?: Partial;\n pollingInterval?: number;\n fallbackConfig?: Record;\n apiService?: AbstractConfigRegistryApiService;\n};\n\nexport class ConfigRegistryController extends StaticIntervalPollingController()<\n typeof controllerName,\n ConfigRegistryState,\n ConfigRegistryMessenger\n> {\n readonly #fallbackConfig: Record;\n\n readonly #apiService: AbstractConfigRegistryApiService;\n\n /**\n * @param options - The controller options.\n * @param options.messenger - The controller messenger.\n * @param options.state - Initial state.\n * @param options.pollingInterval - Polling interval in milliseconds.\n * @param options.fallbackConfig - Fallback configuration.\n * @param options.apiService - The API service.\n */\n constructor({\n messenger,\n state = {},\n pollingInterval = DEFAULT_POLLING_INTERVAL,\n fallbackConfig = DEFAULT_FALLBACK_CONFIG,\n apiService = new ConfigRegistryApiService(),\n }: ConfigRegistryControllerOptions) {\n super({\n name: controllerName,\n metadata: stateMetadata,\n messenger,\n state: {\n configs: { networks: {} },\n version: null,\n lastFetched: null,\n fetchError: null,\n etag: null,\n ...state,\n },\n });\n\n this.setIntervalLength(pollingInterval);\n this.#fallbackConfig = fallbackConfig;\n this.#apiService = apiService;\n\n this.messenger.registerActionHandler(\n `${controllerName}:getConfig`,\n (key: string) => this.getConfig(key),\n );\n\n this.messenger.registerActionHandler(\n `${controllerName}:setConfig`,\n (key: string, value: Json, metadata?: Json) =>\n this.setConfig(key, value, metadata),\n );\n\n this.messenger.registerActionHandler(\n `${controllerName}:getAllConfigs`,\n () => this.getAllConfigs(),\n );\n\n this.messenger.registerActionHandler(\n `${controllerName}:startPolling`,\n (input: ConfigRegistryPollingInput) => this.startPolling(input),\n );\n\n this.messenger.registerActionHandler(`${controllerName}:stopPolling`, () =>\n this.stopPolling(),\n );\n }\n\n async _executePoll(_input: ConfigRegistryPollingInput): Promise {\n const isApiEnabled = isConfigRegistryApiEnabled(this.messenger);\n\n if (!isApiEnabled) {\n this.#useFallbackConfig(\n 'Feature flag disabled - using fallback configuration',\n );\n return;\n }\n\n try {\n const result: FetchConfigResult = await this.#apiService.fetchConfig({\n etag: this.state.etag ?? undefined,\n });\n\n if (result.notModified) {\n this.update((state) => {\n state.fetchError = null;\n });\n return;\n }\n\n // Filter networks: only featured, active, non-testnet networks\n const filteredNetworks = filterNetworks(result.data.data.networks, {\n isFeatured: true,\n isActive: true,\n isTestnet: false,\n });\n\n const newConfigs: Record = {};\n for (const network of filteredNetworks) {\n newConfigs[network.chainId] = {\n key: network.chainId,\n value: network as unknown as Json,\n };\n }\n\n this.update((state) => {\n // eslint-disable-next-line @typescript-eslint/no-explicit-any\n (state.configs as any) = { networks: newConfigs };\n state.version = result.data.data.version;\n state.lastFetched = Date.now();\n state.fetchError = null;\n state.etag = result.etag ?? null;\n });\n } catch (error) {\n this.#handleFetchError(error);\n }\n }\n\n #useFallbackConfig(errorMessage?: string): void {\n this.update((state) => {\n // eslint-disable-next-line @typescript-eslint/no-explicit-any\n (state.configs as any) = { networks: { ...this.#fallbackConfig } };\n state.fetchError =\n errorMessage ?? 'Using fallback configuration - API unavailable';\n state.etag = null;\n });\n }\n\n #handleFetchError(error: unknown): void {\n const errorMessage =\n error instanceof Error ? error.message : 'Unknown error occurred';\n\n const hasNoConfigs =\n Object.keys(this.state.configs?.networks ?? {}).length === 0;\n\n if (hasNoConfigs) {\n this.#useFallbackConfig(errorMessage);\n } else {\n this.update((state) => {\n state.fetchError = errorMessage;\n });\n }\n }\n\n getConfig(key: string): RegistryConfigEntry | undefined {\n return this.state.configs?.networks?.[key];\n }\n\n getAllConfigs(): Record {\n return { ...(this.state.configs?.networks ?? {}) };\n }\n\n getConfigValue(key: string): TValue | undefined {\n const entry = this.state.configs?.networks?.[key];\n return entry?.value as TValue | undefined;\n }\n\n setConfig(key: string, value: Json, metadata?: Json): void {\n this.update((state) => {\n if (!state.configs) {\n // eslint-disable-next-line @typescript-eslint/no-explicit-any\n (state.configs as any) = { networks: {} };\n }\n if (!state.configs.networks) {\n // eslint-disable-next-line @typescript-eslint/no-explicit-any\n (state.configs.networks as any) = {};\n }\n // eslint-disable-next-line @typescript-eslint/no-explicit-any\n (state.configs.networks as any)[key] = {\n key,\n value,\n metadata,\n };\n });\n }\n\n removeConfig(key: string): void {\n this.update((state) => {\n if (state.configs?.networks) {\n delete state.configs.networks[key];\n }\n });\n }\n\n clearConfigs(): void {\n this.update((state) => {\n // eslint-disable-next-line @typescript-eslint/no-explicit-any\n (state.configs as any) = { networks: {} };\n });\n }\n\n startPolling(input: ConfigRegistryPollingInput = {}): string {\n return super.startPolling(input);\n }\n\n stopPolling(): void {\n super.stopAllPolling();\n }\n}\n"]}