import { ethers } from 'ethers';
declare const defineProperties: typeof ethers.defineProperties, resolveProperties: typeof ethers.resolveProperties;
export { defineProperties, resolveProperties };
export type Optionals<T extends object> = Omit<T, Exclude<{
    [K in keyof T]: T extends Record<K, T[K]> ? K : never;
}[keyof T], undefined>>;
export type Mask<T, K> = Omit<T, keyof K>;
export type Forbid<T, K extends keyof any> = T & {
    [P in K]?: never;
};