/**
 * Resolves the transfer-convertible source transaction types for the caller's
 * company from the `update_transaction_type_config` Statsig dynamic config.
 *
 * Expected JSON shape (Statsig configValue):
 * ```
 * {
 *   "transaction_types": {
 *     "all": ["expense", "journal_entry", "credit_card_credit", "vendor_credit"],
 *     "c_0bdec3e6-...": ["expense", "journal_entry", ...]
 *   }
 * }
 * ```
 *
 * Resolution (first match wins): per-company override
 * (`transaction_types[companyId]`) → shared `all` list →
 * {@link DEFAULT_TRANSFER_CONVERTIBLE_SOURCE_TYPES} (also returned while loading).
 *
 * `companyId` is passed in (not read inside the hook) because it lives in the
 * host app's state, which `web-components` does not depend on directly.
 */
export declare function useTransferConvertibleSourceTypes(companyId: string | undefined): Set<string>;