import { AmountData, BalanceItem } from '@soul-wallet/extension-base/background/KoniTypes';
import { ChainService } from '@soul-wallet/extension-base/services/chain-service';
export declare class BalanceService {
    private chainService;
    constructor(chainService: ChainService);
    subscribeTokenFreeBalance(address: string, chain: string, tokenSlug: string | undefined, callback?: (rs: AmountData) => void): Promise<[() => void, AmountData]>;
    getTokenFreeBalance(address: string, chain: string, tokenSlug?: string): Promise<AmountData>;
    subscribeBalance(addresses: string[], chains: string[] | null, callback: (rs: BalanceItem) => void): () => void;
}