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type {\n ApprovalControllerAcceptRequestAction,\n ApprovalControllerHasRequestAction,\n} from '@metamask/approval-controller';\nimport type {\n ControllerGetStateAction,\n ControllerStateChangeEvent,\n} from '@metamask/base-controller';\nimport { BaseController } from '@metamask/base-controller';\nimport type { Messenger } from '@metamask/messenger';\nimport type { PermissionControllerHasPermissionAction } from '@metamask/permission-controller';\nimport type {\n InterfaceState,\n SnapId,\n ComponentOrElement,\n InterfaceContext,\n FungibleAssetMetadata,\n} from '@metamask/snaps-sdk';\nimport { ContentType } from '@metamask/snaps-sdk';\nimport type { JSXElement } from '@metamask/snaps-sdk/jsx';\nimport type { InternalAccount } from '@metamask/snaps-utils';\nimport {\n getJsonSizeUnsafe,\n snapOwnsAccount,\n validateJsxElements,\n} from '@metamask/snaps-utils';\nimport type {\n CaipAccountId,\n CaipAssetType,\n CaipChainId,\n Json,\n} from '@metamask/utils';\nimport { assert, hasProperty, parseCaipAccountId } from '@metamask/utils';\nimport { castDraft } from 'immer';\nimport { nanoid } from 'nanoid';\n\nimport type { SnapInterfaceControllerMethodActions } from './SnapInterfaceController-method-action-types';\nimport {\n constructState,\n getJsxInterface,\n isMatchingChainId,\n validateInterfaceContext,\n} from './utils';\nimport type { SnapControllerGetSnapAction } from '../snaps';\n\nconst MAX_UI_CONTENT_SIZE = 10_000_000; // 10 mb\n\nconst controllerName = 'SnapInterfaceController';\n\nconst MESSENGER_EXPOSED_METHODS = [\n 'createInterface',\n 'getInterface',\n 'getInterfaceState',\n 'updateInterface',\n 'deleteInterface',\n 'updateInterfaceState',\n 'resolveInterface',\n 'setInterfaceDisplayed',\n] as const;\n\ntype AccountsControllerGetAccountByAddressAction = {\n type: `AccountsController:getAccountByAddress`;\n handler: (address: string) => InternalAccount | undefined;\n};\n\ntype AccountsControllerGetSelectedMultichainAccountAction = {\n type: `AccountsController:getSelectedMultichainAccount`;\n handler: () => InternalAccount;\n};\n\ntype AccountsControllerListMultichainAccountsAction = {\n type: `AccountsController:listMultichainAccounts`;\n handler: (chainId?: CaipChainId) => InternalAccount[];\n};\n\nexport type SnapInterfaceControllerGetStateAction = ControllerGetStateAction<\n typeof controllerName,\n SnapInterfaceControllerState\n>;\n\ntype MultichainAssetsControllerGetStateAction = ControllerGetStateAction<\n 'MultichainAssetsController',\n {\n assetsMetadata: {\n [asset: CaipAssetType]: FungibleAssetMetadata;\n };\n accountsAssets: { [account: string]: CaipAssetType[] };\n }\n>;\n\ntype PhishingControllerTestOrigin = {\n type: 'PhishingController:testOrigin';\n handler: (origin: string) => { result: boolean; type: string };\n};\n\ntype AllowedActions =\n | PhishingControllerTestOrigin\n | ApprovalControllerHasRequestAction\n | ApprovalControllerAcceptRequestAction\n | SnapControllerGetSnapAction\n | MultichainAssetsControllerGetStateAction\n | AccountsControllerGetSelectedMultichainAccountAction\n | AccountsControllerGetAccountByAddressAction\n | AccountsControllerListMultichainAccountsAction\n | PermissionControllerHasPermissionAction;\n\nexport type SnapInterfaceControllerActions =\n | SnapInterfaceControllerGetStateAction\n | SnapInterfaceControllerMethodActions;\n\nexport type SnapInterfaceControllerStateChangeEvent =\n ControllerStateChangeEvent<\n typeof controllerName,\n SnapInterfaceControllerState\n >;\n\ntype OtherNotification = { type: string; [key: string]: unknown };\n\ntype ExpandedView = {\n title: string;\n interfaceId: string;\n footerLink?: { href: string; text: string };\n};\n\ntype NormalSnapNotificationData = { message: string; origin: string };\n\ntype ExpandedSnapNotificationData = {\n message: string;\n origin: string;\n detailedView: ExpandedView;\n};\n\ntype SnapNotification = {\n type: 'snap';\n data: NormalSnapNotificationData | ExpandedSnapNotificationData;\n readDate: string | null;\n};\n\ntype Notification = OtherNotification | SnapNotification;\n\ntype NotificationListUpdatedEvent = {\n type: 'NotificationServicesController:notificationsListUpdated';\n payload: [Notification[]];\n};\n\ntype AllowedEvents = NotificationListUpdatedEvent;\n\nexport type SnapInterfaceControllerEvents =\n SnapInterfaceControllerStateChangeEvent;\n\nexport type SnapInterfaceControllerMessenger = Messenger<\n typeof controllerName,\n SnapInterfaceControllerActions | AllowedActions,\n SnapInterfaceControllerEvents | AllowedEvents\n>;\n\nexport type StoredInterface = {\n snapId: SnapId;\n content: JSXElement;\n state: InterfaceState;\n context: InterfaceContext | null;\n contentType: ContentType | null;\n\n /**\n * Whether the interface has been displayed in the UI at least once.\n */\n displayed: boolean;\n};\n\nexport type SnapInterfaceControllerState = {\n interfaces: Record;\n};\n\nexport type SnapInterfaceControllerArgs = {\n messenger: SnapInterfaceControllerMessenger;\n state?: SnapInterfaceControllerState;\n};\n\n/**\n * Use this controller to manage snaps UI interfaces using RPC method hooks.\n */\nexport class SnapInterfaceController extends BaseController<\n typeof controllerName,\n SnapInterfaceControllerState,\n SnapInterfaceControllerMessenger\n> {\n constructor({ messenger, state }: SnapInterfaceControllerArgs) {\n super({\n messenger,\n metadata: {\n interfaces: {\n includeInStateLogs: true,\n persist: (interfaces: Record) => {\n return Object.entries(interfaces).reduce<\n Record\n >((persistedInterfaces, [id, snapInterface]) => {\n switch (snapInterface.contentType) {\n case ContentType.Notification:\n persistedInterfaces[id] = snapInterface;\n return persistedInterfaces;\n default:\n return persistedInterfaces;\n }\n }, {});\n },\n includeInDebugSnapshot: false,\n usedInUi: true,\n },\n },\n name: controllerName,\n state: { interfaces: {}, ...state },\n });\n\n this.messenger.subscribe(\n 'NotificationServicesController:notificationsListUpdated',\n this.#onNotificationsListUpdated.bind(this),\n );\n\n this.messenger.registerMethodActionHandlers(\n this,\n MESSENGER_EXPOSED_METHODS,\n );\n }\n\n /**\n * Create an interface in the controller state with the associated data.\n *\n * @param snapId - The snap id that created the interface.\n * @param content - The interface content.\n * @param context - An optional interface context object.\n * @param contentType - The type of content.\n * @returns The newly interface id.\n */\n createInterface(\n snapId: SnapId,\n content: ComponentOrElement,\n context?: InterfaceContext,\n contentType?: ContentType,\n ) {\n const element = getJsxInterface(content);\n this.#validateContent(snapId, element);\n validateInterfaceContext(context);\n\n const id = nanoid();\n const componentState = constructState({}, element, {\n getAssetsState: this.#getAssetsState.bind(this),\n getAccountByAddress: this.#getAccountByAddress.bind(this),\n getSelectedAccount: this.#getSelectedAccount.bind(this),\n listAccounts: this.#listAccounts.bind(this),\n snapOwnsAccount: (account: InternalAccount) =>\n snapOwnsAccount(snapId, account),\n });\n\n this.update((draftState) => {\n // @ts-expect-error - TS2589: Type instantiation is excessively deep and\n // possibly infinite.\n draftState.interfaces[id] = {\n snapId,\n content: castDraft(element),\n state: componentState,\n context: context ?? null,\n contentType: contentType ?? null,\n displayed: false,\n };\n });\n\n return id;\n }\n\n /**\n * Get the data of a given interface id.\n *\n * @param snapId - The snap id requesting the interface data.\n * @param id - The interface id.\n * @returns The interface state.\n */\n getInterface(snapId: SnapId, id: string) {\n this.#validateArgs(snapId, id);\n\n return this.state.interfaces[id];\n }\n\n /**\n * Get the state of a given interface ID, if the interface has been displayed\n * at least once.\n *\n * @param snapId - The snap ID requesting the interface state.\n * @param id - The interface ID.\n * @returns The interface state.\n */\n getInterfaceState(snapId: SnapId, id: string) {\n const storedInterface = this.getInterface(snapId, id);\n if (!storedInterface.displayed) {\n throw new Error(\n `Interface with ID '${id}' has not been displayed yet. Interface state is not available until the interface has been displayed at least once.`,\n );\n }\n\n return storedInterface.state;\n }\n\n /**\n * Update the interface with the given content.\n *\n * @param snapId - The snap id requesting the update.\n * @param id - The interface id.\n * @param content - The new content.\n * @param context - An optional interface context object.\n */\n updateInterface(\n snapId: SnapId,\n id: string,\n content: ComponentOrElement,\n context?: InterfaceContext,\n ) {\n this.#validateArgs(snapId, id);\n const element = getJsxInterface(content);\n this.#validateContent(snapId, element);\n validateInterfaceContext(context);\n\n const oldState = this.state.interfaces[id].state;\n const newState = constructState(oldState, element, {\n getAssetsState: this.#getAssetsState.bind(this),\n getAccountByAddress: this.#getAccountByAddress.bind(this),\n getSelectedAccount: this.#getSelectedAccount.bind(this),\n listAccounts: this.#listAccounts.bind(this),\n snapOwnsAccount: (account: InternalAccount) =>\n snapOwnsAccount(snapId, account),\n });\n\n this.update((draftState) => {\n draftState.interfaces[id].state = newState;\n draftState.interfaces[id].content = castDraft(element);\n if (context) {\n draftState.interfaces[id].context = context;\n }\n });\n }\n\n /**\n * Delete an interface from state.\n *\n * @param id - The interface id.\n */\n deleteInterface(id: string) {\n this.update((draftState) => {\n delete draftState.interfaces[id];\n });\n }\n\n /**\n * Update the interface state.\n *\n * @param id - The interface id.\n * @param state - The new state.\n */\n updateInterfaceState(id: string, state: InterfaceState) {\n this.update((draftState) => {\n draftState.interfaces[id].state = state;\n });\n }\n\n /**\n * Resolve the promise of a given interface approval request.\n * The approval needs to have the same ID as the interface.\n *\n * @param snapId - The snap id.\n * @param id - The interface id.\n * @param value - The value to resolve the promise with.\n */\n async resolveInterface(snapId: SnapId, id: string, value: Json) {\n this.#validateArgs(snapId, id);\n this.#validateApproval(id);\n\n await this.#acceptApprovalRequest(id, value);\n\n this.deleteInterface(id);\n }\n\n /**\n * Set the interface as displayed.\n *\n * @param snapId - The snap ID requesting the update.\n * @param id - The interface ID.\n */\n setInterfaceDisplayed(snapId: SnapId, id: string) {\n this.#validateArgs(snapId, id);\n\n if (this.state.interfaces[id].displayed) {\n return;\n }\n\n this.update((draftState) => {\n draftState.interfaces[id].displayed = true;\n });\n }\n\n /**\n * Utility function to validate the args passed to the other methods.\n *\n * @param snapId - The snap id.\n * @param id - The interface id.\n */\n #validateArgs(snapId: SnapId, id: string) {\n const existingInterface = this.state.interfaces[id];\n\n assert(\n existingInterface !== undefined,\n `Interface with id '${id}' not found.`,\n );\n assert(\n existingInterface.snapId === snapId,\n `Interface not created by ${snapId}.`,\n );\n }\n\n /**\n * Utility function to validate that the approval request exists.\n *\n * @param id - The interface id.\n */\n #validateApproval(id: string) {\n assert(\n this.#hasApprovalRequest(id),\n `Approval request with id '${id}' not found.`,\n );\n }\n\n /**\n * Check an origin against the phishing list.\n *\n * @param origin - The origin to check.\n * @returns True if the origin is on the phishing list, otherwise false.\n */\n #checkPhishingList(origin: string) {\n return this.messenger.call('PhishingController:testOrigin', origin).result;\n }\n\n /**\n * Check if an approval request exists for a given interface by looking up\n * if the ApprovalController has a request with the given interface ID.\n *\n * @param id - The interface id.\n * @returns True if an approval request exists, otherwise false.\n */\n #hasApprovalRequest(id: string) {\n return this.messenger.call('ApprovalController:hasRequest', {\n id,\n });\n }\n\n /**\n * Accept an approval request for a given interface.\n *\n * @param id - The interface id.\n * @param value - The value to resolve the promise with.\n */\n async #acceptApprovalRequest(id: string, value: Json) {\n await this.messenger.call('ApprovalController:acceptRequest', id, value);\n }\n\n /**\n * Get the selected account in the client.\n *\n * @returns The selected account.\n */\n #getSelectedAccount() {\n return this.messenger.call(\n 'AccountsController:getSelectedMultichainAccount',\n );\n }\n\n /**\n * Get a list of accounts for the given chain IDs.\n *\n * @param chainIds - The chain IDs to get the accounts for.\n * @returns The list of accounts.\n */\n #listAccounts(chainIds?: CaipChainId[]) {\n const accounts = this.messenger.call(\n 'AccountsController:listMultichainAccounts',\n );\n\n if (!chainIds || chainIds.length === 0) {\n return accounts;\n }\n\n return accounts.filter((account) =>\n account.scopes.some((scope) => isMatchingChainId(scope, chainIds)),\n );\n }\n\n /**\n * Get an account by its address.\n *\n * @param address - The account address.\n * @returns The account or undefined if not found.\n */\n #getAccountByAddress(address: CaipAccountId) {\n const { address: parsedAddress } = parseCaipAccountId(address);\n\n return this.messenger.call(\n 'AccountsController:getAccountByAddress',\n parsedAddress,\n );\n }\n\n /**\n * Get the MultichainAssetsController state.\n *\n * @returns The MultichainAssetsController state.\n */\n #getAssetsState() {\n return this.messenger.call('MultichainAssetsController:getState');\n }\n\n /**\n * Get a snap by its id.\n *\n * @param id - The snap id.\n * @returns The snap.\n */\n #getSnap(id: string) {\n return this.messenger.call('SnapController:getSnap', id);\n }\n\n #hasPermission(snapId: SnapId, permission: string) {\n return this.messenger.call(\n 'PermissionController:hasPermission',\n snapId,\n permission,\n );\n }\n\n /**\n * Utility function to validate the components of an interface.\n * Throws if something is invalid.\n *\n * @param snapId - The Snap ID.\n * @param element - The JSX element to verify.\n */\n #validateContent(snapId: SnapId, element: JSXElement) {\n // We assume the validity of this JSON to be validated by the caller.\n // E.g., in the RPC method implementation.\n const size = getJsonSizeUnsafe(element);\n assert(\n size <= MAX_UI_CONTENT_SIZE,\n `A Snap UI may not be larger than ${MAX_UI_CONTENT_SIZE / 1000000} MB.`,\n );\n\n validateJsxElements(element, {\n isOnPhishingList: this.#checkPhishingList.bind(this),\n getSnap: this.#getSnap.bind(this),\n getAccountByAddress: this.#getAccountByAddress.bind(this),\n hasPermission: this.#hasPermission.bind(this, snapId),\n });\n }\n\n #onNotificationsListUpdated(notificationsList: Notification[]) {\n const snapNotificationsWithInterface = notificationsList.filter(\n (notification) => {\n return (\n notification.type === 'snap' &&\n hasProperty((notification as SnapNotification).data, 'detailedView')\n );\n },\n );\n\n const interfaceIdSet = new Set(\n snapNotificationsWithInterface.map(\n (notification) =>\n (\n (notification as SnapNotification)\n .data as ExpandedSnapNotificationData\n ).detailedView.interfaceId,\n ),\n );\n\n this.update((state) => {\n Object.entries(state.interfaces).forEach(([id, snapInterface]) => {\n if (\n snapInterface.contentType === ContentType.Notification &&\n !interfaceIdSet.has(id)\n ) {\n delete state.interfaces[id];\n }\n });\n });\n }\n}\n"]}