import { AccountId, SetIndex } from '@plugnet/types/interfaces';
import { ApiInterfaceRx } from '@plugnet/api/types';
import { Observable } from 'rxjs';
/**
 * @name approvalsOfAt
 * @returns An array of boolean approvals for the account and set index, converted from the returned ApprovalFlag.
 * @example
 * <BR>
 *
 * ```javascript
 * api.derive.elections.approvalsOfAt(ALICE, new BN(0), (approvals) => {
 *   // approvals === [false, true, ...]
 * });
 * ```
 */
export declare function approvalsOfAt(api: ApiInterfaceRx): (who: AccountId, at: SetIndex) => Observable<boolean[]>;