import { PublicKey } from "@solana/web3.js";
/**
 * A Set implementation that uses PublicKey as values.
 *
 * This class extends the standard Set and allows using PublicKey objects
 * as values by converting them to base58 strings internally. This solves the
 * problem of PublicKey object reference equality - two PublicKey objects
 * with the same address would normally be considered different values in a Set.
 *
 * @example
 * ```typescript
 * // Create empty set
 * const set = new PkSet();
 * const key = new PublicKey("11111111111111111111111111111111");
 * set.add(key);
 *
 * // Create with initial values
 * const set2 = new PkSet([
 *   new PublicKey("11111111111111111111111111111111"),
 *   new PublicKey("22222222222222222222222222222222")
 * ]);
 *
 * // Can check with a different PublicKey object with same address
 * const sameKey = new PublicKey("11111111111111111111111111111111");
 * console.log(set.has(sameKey)); // true
 * ```
 */
export declare class PkSet {
    private readonly _set;
    /**
     * Creates a new PkSet instance.
     * @param values - Optional initial values as PublicKey array
     */
    constructor(values?: readonly PublicKey[] | null);
    /**
     * Adds the specified PublicKey to this set.
     * @param value - The PublicKey to add to the set
     * @returns This PkSet instance for chaining
     */
    add(value: PublicKey): this;
    /**
     * Returns true if this set contains the specified PublicKey.
     * @param value - The PublicKey whose presence in this set is to be tested
     * @returns true if this set contains the specified PublicKey
     */
    has(value: PublicKey): boolean;
    /**
     * Removes the specified PublicKey from this set if present.
     * @param value - The PublicKey to be removed
     * @returns true if the element was removed, false otherwise
     */
    delete(value: PublicKey): boolean;
    /**
     * Returns an iterator of all PublicKey values in this set.
     * Note: This reconstructs PublicKey objects from the stored base58 strings.
     * @returns An iterator of PublicKey objects
     */
    pkValues(): IterableIterator<PublicKey>;
    /**
     * Executes a provided function once per each PublicKey in the Set.
     * @param callbackfn - Function to execute for each value
     * @param thisArg - Value to use as this when executing callback
     */
    forEach(callbackfn: (value: PublicKey, value2: PublicKey, set: PkSet) => void, thisArg?: any): void;
    get size(): number;
    clear(): void;
    [Symbol.iterator](): IterableIterator<PublicKey>;
    equals(other: PkSet): boolean;
    /**
     * @returns true if this set contains all the PublicKeys in the other set
     */
    includes(other: PkSet): boolean;
}