/**
 * Copyright (c) Microsoft Corporation. All rights reserved.
 * Licensed under the MIT License.
 */
/**
 * General information about a read receipt.
 */
export declare class ReadReceiptInfo {
    /**
     * The id of the last read message.
     */
    lastReadMessageId: string;
    /**
     * Initializes a new instance of the ReadReceiptInfo class.
     *
     * @param lastReadMessageId Optional. The id of the last read message.
     */
    constructor(lastReadMessageId?: string);
    /**
     * Helper method useful for determining if a message has been read. This method
     * converts the strings to numbers. If the compareMessageId is less than or equal to
     * the lastReadMessageId, then the message has been read.
     *
     * @param compareMessageId The id of the message to compare.
     * @param lastReadMessageId The id of the last message read by the user.
     * @returns True if the compareMessageId is less than or equal to the lastReadMessageId.
     */
    static isMessageRead(compareMessageId: string, lastReadMessageId: string): boolean;
    /**
     * Helper method useful for determining if a message has been read.
     * If the compareMessageId is less than or equal to the lastReadMessageId, then the message has been read.
     *
     * @param compareMessageId The id of the message to compare.
     * @returns True if the compareMessageId is less than or equal to the lastReadMessageId.
     */
    isMessageRead(compareMessageId: string): boolean;
}
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