import { Cardano } from '@cardano-sdk/core';
import { EpochMonitor } from './types';
import { Pool } from 'pg';
export declare const EPOCH_POLL_INTERVAL_DEFAULT = 10000;
export declare class DbSyncEpochPollService implements EpochMonitor {
    #private;
    constructor(db: Pool, interval: number);
    onEpochRollover(cb: Function): () => void;
    getLastKnownEpoch(): Promise<Cardano.EpochNo | null>;
    onEpoch(currentEpoch: Cardano.EpochNo): void;
}
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