export type Diff = {
    s?: [string, Encoded][];
    r?: string[];
};
export type EncodedRef = number;
export type EncodedDelta = {
    b: number;
    d: Diff;
};
export type EncodedLit = {
    v: any;
};
export type EncodedNested = {
    nd: Diff;
};
export type Encoded = EncodedRef | EncodedDelta | EncodedLit | EncodedNested;
export type CodecSnapshot = {
    v: 1;
    dict: any[];
    maxSize: number;
};
export declare class StructCodec {
    private dict;
    private index;
    private maxSize;
    constructor(opts?: {
        maxSize?: number;
    });
    get size(): number;
    reset(): void;
    fork(): StructCodec;
    toJSON(): CodecSnapshot;
    static fromJSON(snap: CodecSnapshot): StructCodec;
    encode(value: any, basis?: any): Encoded;
    decode(encoded: Encoded): any;
    private decodeInner;
    private decodeSetValue;
    private computeDelta;
    private encodeNestedValue;
    private applyDiff;
    private findExact;
    private addToDict;
    private rebuildIndex;
    private estimateSize;
}
export type CompactedTree = {
    v: 1;
    dict: any[];
    root: any;
};
export declare function compactTree(value: any): CompactedTree;
export declare function expandTree(data: any): any;
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