import { Gindex, HashComputationLevel, Node, Tree } from "@chainsafe/persistent-merkle-tree";
import { Require } from "../util/types.ts";
import { ByteViews, JsonPath, JsonPathProp, Type } from "./abstract.ts";
import { CompositeType } from "./composite.ts";
export type NonOptionalType<T extends Type<unknown>> = T extends OptionalType<infer U> ? U : T;
export type NonOptionalFields<Fields extends Record<string, Type<unknown>>> = {
    [K in keyof Fields]: NonOptionalType<Fields[K]>;
};
export type OptionalOpts = {
    typeName?: string;
};
type ValueOfType<ElementType extends Type<unknown>> = ElementType extends Type<infer T> ? T | null : never;
/**
 * Optional: optional type containing either None or a type
 * - Notation: Optional[type], e.g. optional[uint64]
 * - merklizes as list of length 0 or 1, essentially acts like
 *   - like Union[none,type] or
 *   - list [], [type]
 */
export declare class OptionalType<ElementType extends Type<unknown>> extends CompositeType<ValueOfType<ElementType>, ValueOfType<ElementType>, ValueOfType<ElementType>> {
    readonly elementType: ElementType;
    readonly typeName: string;
    readonly depth: number;
    readonly maxChunkCount: number;
    readonly fixedSize: null;
    readonly minSize: number;
    readonly maxSize: number;
    readonly isList = true;
    readonly isViewMutable = true;
    readonly mixInLengthBlockBytes: Uint8Array<ArrayBuffer>;
    readonly mixInLengthBuffer: Buffer<ArrayBufferLike>;
    constructor(elementType: ElementType, opts?: OptionalOpts);
    static named<ElementType extends Type<unknown>>(elementType: ElementType, opts: Require<OptionalOpts, "typeName">): OptionalType<ElementType>;
    defaultValue(): ValueOfType<ElementType>;
    getView(tree: Tree): ValueOfType<ElementType>;
    getViewDU(node: Node): ValueOfType<ElementType>;
    commitView(view: ValueOfType<ElementType>): Node;
    commitViewDU(view: ValueOfType<ElementType>, hcOffset?: number, hcByLevel?: HashComputationLevel[] | null): Node;
    cacheOfViewDU(): unknown;
    value_serializedSize(value: ValueOfType<ElementType>): number;
    value_serializeToBytes(output: ByteViews, offset: number, value: ValueOfType<ElementType>): number;
    value_deserializeFromBytes(data: ByteViews, start: number, end: number, reuseBytes?: boolean): ValueOfType<ElementType>;
    tree_serializedSize(node: Node): number;
    tree_serializeToBytes(output: ByteViews, offset: number, node: Node): number;
    tree_deserializeFromBytes(data: ByteViews, start: number, end: number): Node;
    hashTreeRoot(value: ValueOfType<ElementType>): Uint8Array;
    hashTreeRootInto(value: ValueOfType<ElementType>, output: Uint8Array, offset: number): void;
    protected getBlocksBytes(value: ValueOfType<ElementType>): Uint8Array;
    getPropertyGindex(prop: JsonPathProp): Gindex | null;
    getPropertyType(prop: JsonPathProp): Type<unknown>;
    getIndexProperty(index: number): JsonPathProp | null;
    tree_createProofGindexes(node: Node, jsonPaths: JsonPath[]): Gindex[];
    tree_getLeafGindices(rootGindex: bigint, rootNode?: Node): Gindex[];
    fromJson(json: unknown): ValueOfType<ElementType>;
    toJson(value: ValueOfType<ElementType>): unknown | Record<string, unknown>;
    clone(value: ValueOfType<ElementType>): ValueOfType<ElementType>;
    equals(a: ValueOfType<ElementType>, b: ValueOfType<ElementType>): boolean;
}
export declare function isOptionalType(type: Type<unknown>): type is OptionalType<Type<unknown>>;
export declare function toNonOptionalType<T extends Type<unknown>>(type: T): NonOptionalType<T>;
export {};