export declare const BLOCK_SIZE: number;
export declare function getBlockId(modified: number): string;
export declare function getBlockRange(blockId: string): {
    min: number;
    max: number;
};
export declare const invalidatedBlockIds: {
    [groupId: string]: {
        [blockId: string]: true;
    };
};
export declare function invalidateCache(groupId: string, modified: number, oldModified?: number): void;
export declare const prefixHashDetails: {
    [groupId: string]: {
        [prefix: string]: {
            [subPrefix: string]: string;
        };
    };
};
export declare function populateGroupHashes(groupId: string): Promise<void>;
export declare function getPrefixHashes(groupId: string, blockPrefix?: string): Promise<{
    [subPrefix: string]: string;
}>;
export declare function getDetailHashes(groupId: string, blockId_?: string): Promise<{
    [blockId: string]: string;
}>;
export declare function getBlockChangeInfo(groupId: string, blockId: string): Promise<{
    id: string;
    modified: number;
}[]>;