import type { SignerOptions } from './types/signer-options';
import { type Prompts, type RegisterPrompts } from './types/signer-prompts';
export declare class Signer {
    #private;
    private constructor();
    /**
     * Creates a signer that listens and communicates with a relying party.
     *
     * @static
     * @param {SignerOptions} options - The options for the signer.
     * @returns {Signer} The connected signer.
     */
    static init(options: SignerOptions): Signer;
    /**
     * Disconnects the signer, removing the message event listener and cleanup.
     * @returns {void}
     */
    disconnect: () => void;
    private readonly onMessageListener;
    private readonly onMessage;
    /**
     * Handles a potential readonly-only message request.
     *
     * The readonly-only message request might be triggered while the signer is busy processing requests.
     * Since these informative requests do not impact the signer's behavior, it is acceptable to provide a response read-only requests.
     *
     * @private
     * @param {SignerMessageEvent} message - The message event to process.
     * @returns {{ handled: boolean }} - An object indicating whether the message was handled.
     */
    private handleReadOnlyMessage;
    private handleMessage;
    private setWalletOrigin;
    /**
     * When establishing a connection, validates the origin of a message event to ensure it matches the existing wallet origin - i.e. subsequent status requests - or is undefined - i.e. first status request.
     * If the origin is invalid, it sends an error notification with the appropriate error code and message.
     *
     * @private
     * @param {object} event - The message event to validate.
     * @param {any} event.data - The data sent in the message event.
     * @param {string} event.origin - The origin of the message event.
     *
     * @returns {object} An object containing a `valid` boolean property.
     * @returns {boolean} returns `true` if the origin is either undefined or matches the expected wallet origin, otherwise returns `false` and notifies the error.
     */
    private assertUndefinedOrSameOrigin;
    /**
     * Checks if the signer is busy and notifies the relying party if it is.
     *
     * This is required for security reason to avoid the consumer of the signer to for example process a call canister while at the same time new permissions are requested.
     *
     * @private
     * @param {object} event - The message event to validate.
     * @param {any} event.data - The data sent in the message event.
     * @param {string} event.origin - The origin of the message event.
     *
     * @returns {object} An object containing a `busy` boolean property.
     * @returns {boolean} returns true` if the signer is busy, otherwise `false`.
     */
    private assertNotBusy;
    private handleWithBusy;
    private setIdle;
    /**
     * Validates that the wallet origin is defined and matches the origin of the message event that established the connection.
     * If the origin is invalid or the wallet origin is not defined, it sends an error notification
     * with the appropriate error code and message.
     *
     * @private
     * @param {object} event - The message event to validate.
     * @param {any} event.data - The data sent in the message event.
     * @param {string} event.origin - The origin of the message event.
     *
     * @returns {object} An object containing a `valid` boolean property.
     * @returns {boolean} returns `true` if the wallet origin is defined and matches the origin of the message event, otherwise returns `false` and notifies the error.
     */
    private assertNotUndefinedAndSameOrigin;
    /**
     * Registers a prompt handler for a specified method in the signer service.
     *
     * @template T
     * @param {RegisterPrompts<T>} options - An object containing the method and corresponding prompt handler.
     * @param {T} options.method - The method for which the prompt handler is being registered. Supported methods include ICRC standards.
     * @param {Prompts[T]} options.prompt - The prompt handler that should be registered. The prompt type depends on the method being registered.
     *
     * @throws {Error} Throws an error if the method is not supported or the prompt type does not match the expected type for the given method.
     *
     * @example
     * // Register a permissions prompt
     * register({
     *   method: 'icrc25_request_permissions', // or alternatively using related constant ICRC25_REQUEST_PERMISSIONS
     *   prompt: (payload) => {
     *     payload.confirm(requestedScopes);
     *   }
     * });
     */
    register: <T extends keyof Prompts>({ method, prompt }: RegisterPrompts<T>) => void;
    /**
     * Handles incoming status requests.
     *
     * Parses the message data to determine if it conforms to a status request, sends a notification indicating that the signer is ready and set the origin for asserting subsequent calls.
     *
     * @param {SignerMessageEvent} message - The incoming message event containing the data and origin.
     * @returns {Object} An object with a boolean property `handled` indicating whether the request was handled.
     */
    private handleStatusRequest;
    /**
     * Handles incoming messages to list the supported standards.
     *
     * Parses the message data to determine if it conforms to a supported standards request and responds with a notification with the supported standards.
     *
     * @param {SignerMessageEvent} message - The incoming message event containing the data and origin.
     * @returns {Object} An object with a boolean property `handled` indicating whether the request was handled.
     */
    private handleSupportedStandards;
    /**
     * Handles incoming messages to list the permissions.
     *
     * Parses the message data to determine if it conforms to a permissions request and responds with a notification with the scopes of the permissions.
     *
     * @param {SignerMessageEvent} message - The incoming message event containing the data and origin.
     * @returns {Object} An object with a boolean property `handled` indicating whether the request was handled.
     */
    private handlePermissionsRequest;
    /**
     * Handles incoming messages to request permissions.
     *
     * Parses the message data to determine if it conforms to a request permissions schema. If it does,
     * forwards the parameters to the clients, as requesting permissions requires the user to review
     * and approve or decline them.
     *
     * @param {SignerMessageEvent} message - The incoming message event containing the data and origin.
     * @returns {Object} An object with a boolean property `handled` indicating whether the request was processed as a permissions request.
     */
    private handleRequestPermissionsRequest;
    private promptPermissions;
    private emitPermissions;
    private assertWalletOriginAndNotifyMissingPromptError;
    private savePermissions;
    /**
     * Handles incoming messages to list the accounts.
     *
     * Parses the message data to determine if it conforms to a accounts request and responds with the accounts if the permissions are granted.
     *
     * @param {SignerMessageEvent} message - The incoming message event containing the data and origin.
     * @returns {Object} An object with a boolean property `handled` indicating whether the request was handled.
     */
    private handleAccounts;
    private prompt;
    private promptAccounts;
    /**
     * Handles incoming messages to call a canister.
     *
     * Parses the message data to determine if it conforms to a call canister request and responds with the result of the call if the permissions are granted and if the user accept the consent message.
     *
     * @param {SignerMessageEvent} message - The incoming message event containing the data and origin.
     * @returns {Object} An object with a boolean property `handled` indicating whether the request was handled.
     */
    private handleCallCanister;
    /**
     * Asserts the current permission state for the given method and origin. If the permission
     * is set to 'ask_on_use', prompts the user for permission and returns the updated state.
     *
     * @private
     * @async
     * @function
     * @param {Object} params - The parameters for the function.
     * @param {IcrcScopedMethod} params.method - The method for which permissions are being checked.
     * @param {string} params.origin - The origin from where the request is made.
     * @param {RpcId} params.requestId - The unique identifier for the RPC request.
     *
     * @returns {Promise<Omit<IcrcPermissionState, 'ask_on_use'>>} - A promise that resolves to the updated
     * permission state ('granted' or 'denied'), or the current permission if no prompt is needed.
     *
     * @throws {Error} - Throws an error if the permission prompt fails.
     */
    private assertAndPromptPermissions;
}