/**
 * [Gitea #318] The fork's `io.lotus.call_error`: its error page is showing
 * (`{ code, recoverable }`) or was cleared (`{ code: null }`).
 */
export type CallErrorState = { code: string; recoverable: boolean } | null;

/** Pure: parse a report; undefined for garbage (ignored). */
export function parseCallError(data: unknown): CallErrorState | undefined {
  if (typeof data !== 'object' || data === null) return undefined;
  const { code, recoverable } = data as { code?: unknown; recoverable?: unknown };
  if (code === null) return null;
  if (typeof code !== 'string' || !code) return undefined;
  return { code, recoverable: recoverable === true };
}