/**
 * Returns the localized name of a language given its BCP-47 code.
 *
 * @param languageCode - The BCP-47 language code (e.g. "en")
 * @returns The localized language name (e.g. "English") or the original code if unavailable.
 */
export declare function getLanguageName(languageCode: string): string;
/**
 * Requests access to the microphone.
 *
 * This function checks if the microphone permission is in "prompt" state, then requests
 * access and stops any active tracks immediately. It also logs if permission is already granted.
 *
 * @returns A promise that resolves when the permission request is complete.
 */
export declare function requestMicAccess(): Promise<void>;
/**
 * Retrieves available audio input devices.
 *
 * This function uses the mediaDevices API to enumerate devices and filters out those
 * which are audio inputs. In some browsers, you may need to request user media before
 * device labels are populated.
 *
 * @returns A promise that resolves with an object containing:
 *  - `devices`: an array of MediaDeviceInfo objects for audio inputs.
 *  - `defaultDeviceId`: the deviceId of the first audio input, if available.
 */
export declare function getAudioDevices(): Promise<{
    devices: MediaDeviceInfo[];
    defaultDevice?: MediaDeviceInfo;
}>;
/**
 * Decodes a JWT token and extracts environment and tenant details from its issuer URL.
 *
 * This function assumes the JWT token follows the standard header.payload.signature format.
 * It decodes the payload from base64 URL format, parses it as JSON, and then uses a regex
 * to extract the `environment` and `tenant` from the issuer URL (iss field) if it matches the pattern:
 * https://keycloak.{environment}.corti.app/realms/{tenant}.
 *
 * @param token - A JSON Web Token (JWT) string.
 * @returns An object containing:
 *  - `environment`: The extracted environment from the issuer URL.
 *  - `tenant`: The extracted tenant from the issuer URL.
 *  - `accessToken`: The original token string.
 * If the issuer URL doesn't match the expected format, the function returns the full decoded token details.
 *
 * @throws Will throw an error if:
 *  - The token format is invalid.
 *  - The base64 decoding or URI decoding fails.
 *  - The JSON payload is invalid.
 *  - The token payload does not contain an issuer (iss) field.
 */
export declare function decodeToken(token: string): {
    environment: string;
    tenant: string;
    accessToken: string;
} | undefined;
export declare function getMediaStream(deviceId?: string): Promise<MediaStream>;