import { BalanceChecker, TokenDetailsWithBalance } from '@unilogin/commons';
import ObserverRunner from './ObserverRunner';
import { TokensDetailsStore } from '../services/TokensDetailsStore';
export declare type OnBalanceChange = (data: TokenDetailsWithBalance[]) => void;
export declare class BalanceObserver extends ObserverRunner {
    private balanceChecker;
    private walletAddress;
    private tokenDetailsStore;
    private lastTokenBalances;
    private callbacks;
    constructor(balanceChecker: BalanceChecker, walletAddress: string, tokenDetailsStore: TokensDetailsStore, tick: number);
    execute(): Promise<void>;
    getBalances(): Promise<TokenDetailsWithBalance[]>;
    checkBalanceNow(): Promise<void>;
    subscribe(callback: OnBalanceChange): () => void;
}
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