export interface QboFaultError {
    code?: string;
    message?: string;
    detail?: string;
    element?: string;
}
export interface QboFault {
    type?: string;
    errors: QboFaultError[];
}
/** The QBO Fault carried by `error`, wherever it happens to be, or undefined. */
export declare function extractQboFault(error: unknown): QboFault | undefined;
/** HTTP status attached by axios (`response.status`) or by rest.ts (`status`). */
export declare function extractHttpStatus(error: unknown): number | undefined;
/**
 * Whether QuickBooks rejected the credentials rather than the request.
 *
 * The fault is looked up wherever it sits, which is the whole point: a call made
 * through a node-quickbooks method rejects with the raw axios error, so an
 * expired token arrives as a generic Error carrying the AuthenticationFault down
 * on `response.data`. Reading only the top level classifies that as an ordinary
 * failure and the caller never learns to refresh.
 */
export declare function isAuthFault(error: unknown): boolean;
/**
 * A caller-facing description of a failed QuickBooks call: the transport-level
 * message, plus every Fault entry QBO returned. Only fields QBO put in the
 * fault are echoed — never the request body, which for a write is client
 * financial data.
 */
export declare function formatQboError(error: unknown): string;
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