/**
 * OAuth2.0 Verifier Payload
 * @typedef {object} OAuthPayload
 * @property {string} nonce state identifier
 * @property {string} codeVerifier code verifier
 * @memberof SessionState
 */
export interface OAuthPayload {
    nonce: string;
    state: string;
    codeVerifier: string;
}
export declare const OAUTH_LOCAL_STORAGE_KEY = "TWILIO_FLEX_OAUTH";
export declare const OAuthStorage: {
    set(value: OAuthPayload): void;
    get(): OAuthPayload | undefined;
    setToOpenerWindow(value: OAuthPayload): void;
    getFromOpenerWindow(): OAuthPayload | undefined;
    clear(): void;
};