import { ISolanaRecentHash } from '../../interfaces';
import { IMap } from '../../types';
import { BaseLoggerService } from '../base-logger.service';
import { SolanaApiService } from './solana-api.service';
export declare class SolanaHashService {
    protected readonly logger: BaseLoggerService;
    protected readonly solanaApi: SolanaApiService;
    recentHashes: ISolanaRecentHash[];
    hashHistory: IMap<ISolanaRecentHash>;
    readonly logPrefix = "[SolanaHash]";
    private isInitialized;
    private isActive;
    private readonly loopDelayMs;
    private readonly fastDelayMs;
    private readonly fastDelaySize;
    private readonly maxSize;
    constructor(logger: BaseLoggerService, solanaApi: SolanaApiService);
    init(): Promise<boolean>;
    setLoopState(state: boolean): Promise<void>;
    getHashCount(): Promise<number>;
    addHashLoop(): Promise<void>;
    peekHash(): Promise<string>;
    popHash(retries?: number): Promise<string>;
    popHashFront(minValidBlockHeight: number): Promise<ISolanaRecentHash | null>;
    popHashFrontBySlot(minSlot: number): Promise<ISolanaRecentHash | null>;
    private getHashPromise;
    private getHash;
}
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