/**
 * Typed errors returned by Personal Server endpoints.
 *
 * @remarks
 * vana-connect (and other PS clients) need to branch on a small, stable set
 * of lowercase error codes. Personal Server routes currently return protocol
 * errors as `{ error: { code, errorCode, message } }`, while older PoC
 * clients used `{ code, message }`; the parser accepts both shapes.
 *
 * @category Auth
 */
/** Stable error codes returned by Personal Server. */
export type PSErrorCode = "missing_auth" | "invalid_signature" | "unregistered_builder" | "not_owner" | "expired_token" | "grant_invalid" | "grant_required" | "grant_expired" | "grant_revoked" | "scope_mismatch" | "fee_required" | "ps_unavailable" | "server_not_configured" | "content_too_large";
/** Typed error wrapping a non-2xx Personal Server response. */
export declare class PSError extends Error {
    readonly code: PSErrorCode;
    constructor(code: PSErrorCode, message: string);
}
/**
 * Read a Personal Server JSON error body from a non-2xx {@link Response} and
 * return the typed {@link PSError}. The returned code is always lowercase.
 *
 * @returns A {@link PSError} for non-2xx responses with a recognised code,
 *   or `null` for 2xx responses, malformed JSON, or unrecognised codes.
 */
export declare function parsePSError(response: Response): Promise<PSError | null>;