import { Connection } from '@solana/web3.js';
/**
 * FillFeed example implementation.
 */
export declare class FillFeed {
    private connection;
    private wss;
    private shouldEnd;
    private ended;
    private lastUpdateUnix;
    constructor(connection: Connection);
    msSinceLastUpdate(): number;
    stopParseLogs(): Promise<void>;
    /**
     * Parse logs in an endless loop.
     */
    parseLogs(endEarly?: boolean): Promise<void>;
    /**
     * Handle a signature by fetching the tx onchain and possibly sending a fill
     * notification.
     */
    private handleSignature;
}