import { BundleInfo, Medallion, ChainStart, Muid } from "./typedefs";
/**
 * A class to keep track of what data a given instance (self or peer) has for each
 * chain.  So it's kind of like Map<[Medallion, ChainStart], SeenThrough>.
 * This is essentially the same data that's in the Greeting message, so I've included
 * functionality to convert from/to Greeting objects.
 */
export declare class ChainTracker {
    private readonly data;
    private readonly waiters;
    constructor({ greetingBytes, greeting }: {
        greetingBytes?: any;
        greeting?: any;
    });
    /**
     * Allows you to wait until an instance has seen a particular bundle.
     * @param what either a muid address or a bundle info (indicates what to watch for)
     * @param timeoutMs how long to wait before giving up, default of undefined doesn't time out
     * @returns a promise that resolves when the thing has been marked as seen, or rejects at timeout
     */
    waitTillHas({ medallion, timestamp }: BundleInfo | Muid, timeoutMs?: number): Promise<void>;
    /**
     * First, determine if the bundle is novel (represents data not previously marked),
     * then second, mark the data in the data structure (possibly checking that it's a sensible extension).
     * Note that checkValidExtension is used here as a safeguard to make sure we don't
     * send broken chains to the peer; the store should have its own check for receiving.
     * @param bundleInfo Metadata about a particular bundle.
     * @param checkValidExtension If true then barfs if this bundle isn't a valid extension.
     * @returns true if the bundle represents data not seen before
     */
    markAsHaving(bundleInfo: BundleInfo, checkValidExtension?: boolean): boolean;
    /**
     * Constructs the greeting for use during the initial handshake.  Note that
     * the priorTimes aren't included, so recipient should not markIfNovel using
     * @returns
     */
    private constructGreeting;
    /**
     * @returns bytes that can be sent during the initial handshake
     */
    getGreetingMessageBytes(): Uint8Array;
    /**
     * Returns how far along data is seen for a particular chain.
     * @param key A [Medallion, ChainStart] tuple
     * @returns SeenThrough (a Timestamp) or undefined if not yet seen
     */
    getBundleInfo(key: [Medallion, ChainStart]): BundleInfo | undefined;
    /**
     * Gets a list of chains seen for a particular medallion, or a list of all seen chains
     * @param singleMedallion The single medallion to get chains for (returns all if undefined)
     * @returns a list of known chains
     */
    getChains(singleMedallion?: Medallion): Array<[Medallion, ChainStart]>;
}