import type { PublicKey } from '@solana/web3.js';
import type { ValidationOptions } from 'class-validator';
export type PublicKeyValidationOptions = ValidationOptions & {
    allowNull?: boolean;
};
export declare function IsPublicKey(validationOptions?: PublicKeyValidationOptions): (object: object, propertyName: string) => void;
export declare function IsPublicKeyArray(validationOptions?: PublicKeyValidationOptions): (object: object, propertyName: string) => void;
export declare function isPublicKey(value: unknown): value is PublicKey;
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