import { Cid } from '@atproto/lex-data';
import { ReadableBlockstore } from '../storage';
import { MstOpts, NodeData, NodeEntry } from './mst';
export declare const leadingZerosOnHash: (key: string | Uint8Array) => Promise<number>;
export declare const layerForEntries: (entries: NodeEntry[]) => Promise<number | null>;
export declare const deserializeNodeData: (storage: ReadableBlockstore, data: NodeData, opts?: Partial<MstOpts>) => Promise<NodeEntry[]>;
export declare const serializeNodeData: (entries: NodeEntry[]) => NodeData;
export declare const countPrefixLen: (a: string, b: string) => number;
export declare const cidForEntries: (entries: NodeEntry[]) => Promise<Cid>;
export declare const isValidMstKey: (str: string) => boolean;
export declare const validCharsRegex: RegExp;
export declare const isValidChars: (str: string) => boolean;
export declare const ensureValidMstKey: (str: string) => void;
export declare class InvalidMstKeyError extends Error {
    key: string;
    constructor(key: string);
}
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