import { TypedDataDomain, TypedDataField } from '@ethersproject/abstract-signer';
export declare const EIP712_DOMAIN_NAME = "UniversalRouter";
export declare const EIP712_DOMAIN_VERSION = "2";
export declare const EXECUTE_SIGNED_TYPES: Record<string, TypedDataField[]>;
/**
 * Generate EIP712 domain for Universal Router
 */
export declare function getUniversalRouterDomain(chainId: number, verifyingContract: string): TypedDataDomain;
/**
 * Generate a random nonce for signed execution
 * Uses ethers.utils.randomBytes for secure randomness
 */
export declare function generateNonce(): string;
/**
 * Sentinel value to skip nonce checking (allows signature replay)
 */
export declare const NONCE_SKIP_CHECK: string;