/**
 * Auth-specific error classes for Web3Signed verification.
 *
 * @remarks
 * Mirrors the relevant subset of `personal-server-ts` `ProtocolError` so server
 * code that consumes Web3Signed primitives can branch on typed errors. They
 * extend {@link VanaError} so they fit the SDK error hierarchy.
 *
 * @category Error Handling
 */
import { VanaError } from "../errors.js";
/** Thrown when an Authorization header is missing or empty. */
export declare class MissingAuthError extends VanaError {
    readonly details?: Record<string, unknown> | undefined;
    constructor(message?: string, details?: Record<string, unknown> | undefined);
}
/** Thrown when a Web3Signed header is malformed or its signature does not verify. */
export declare class InvalidSignatureError extends VanaError {
    readonly details?: Record<string, unknown> | undefined;
    constructor(details?: Record<string, unknown> | undefined, message?: string);
}
/** Thrown when a Web3Signed token is expired or issued too far in the future. */
export declare class ExpiredTokenError extends VanaError {
    readonly details?: Record<string, unknown> | undefined;
    constructor(details?: Record<string, unknown> | undefined, message?: string);
}