/**
 * Fallback receipts inbox when tenant-specific / cards-config email is unset.
 * Keep in sync with `DEFAULT_RECEIPTS_EMAIL` exported from
 * `@zeniai/client-epic-state` (used by `getReceiptsEmail`).
 *
 * Prefer re-exporting from CES once the consuming package bumps to a version
 * that exports this constant:
 * `export {DEFAULT_RECEIPTS_EMAIL} from "@zeniai/client-epic-state";`
 */
export declare const DEFAULT_RECEIPTS_EMAIL = "receipts@zeni.ai";
/**
 * First non-empty candidate, else {@link DEFAULT_RECEIPTS_EMAIL}.
 * Treats `null`, `undefined`, and `""` as unset (API may send empty string).
 */
export declare function resolveReceiptsEmail(...candidates: Array<string | null | undefined>): string;