import { AccountId } from '@plugnet/types/interfaces';
import { ApiInterfaceRx } from '@plugnet/api/types';
import { Observable } from 'rxjs';
/**
 * @name approvalsOf
 * @returns A nested array of boolean approvals for the given account in each voter set index, converted from its ApprovalFlag(s).
 * @example
 * <BR>
 *
 * ```javascript
 * api.derive.elections.approvalsOf(ALICE, (approvals) => {
 *   // approvals === [[false], [true, false], ...]
 * });
 * ```
 */
export declare function approvalsOf(api: ApiInterfaceRx): (who: AccountId) => Observable<boolean[][]>;