/**
 * JWT header object.
 */
export type JwtHeader = {
    typ?: "JWT";
    alg?: string;
    kid?: string;
};
/**
 * JWT payload object.
 */
export type JwtPayload = object;
/**
 * JWT none algorithm support.
 */
export declare const NONE_KEY: unique symbol;
/**
 * Support `none` JWT key.
 */
export type Key = CryptoKey | typeof NONE_KEY;
/**
 * Raw JWT used for signing.
 */
export type RawJwt = {
    header: JwtHeader;
    payload: JwtPayload;
    data: Uint8Array;
    signature: Uint8Array;
};
/**
 * Decode results for invalid JWTs.
 */
export declare const NOOP_JWT: RawJwt;
/**
 * Decode the JWT using base64url and JSON.
 */
export declare function decodeJwt(token: string): RawJwt;
/**
 * Verify the JWT contents by deriving the signature from the content.
 */
export declare function verifyJwt(raw: RawJwt, key: Key): Promise<boolean>;
/**
 * Stringify a JWT payload and sign using crypto key.
 */
export declare function encodeJwt(header: JwtHeader, payload: JwtPayload, key: Key): Promise<string>;