import type { Chain, Hex, PublicClient, Transport } from 'viem';
type GenerateIntentNonceParams = {
    /** The wallet address whose delegation contract is queried for `isNonceUsed`. */
    walletAddress: Hex;
};
type GenerateIntentNonceDeps = {
    publicClient: PublicClient<Transport, Chain>;
};
/**
 * Generates a random 256-bit bitmap nonce for UGD `AuthorizedExecutions`
 * signing.
 *
 * Uses `crypto.getRandomValues` for entropy; collisions are essentially
 * impossible at 256 bits. As a safety check the freshly-generated nonce is
 * validated against the on-chain `isNonceUsed` view — if the contract call
 * fails (e.g. delegation not yet active), the random nonce is still safe to
 * use because it was generated locally with 256 bits of entropy.
 */
export declare const generateIntentNonce: ({ walletAddress }: GenerateIntentNonceParams, { publicClient }: GenerateIntentNonceDeps) => Promise<bigint>;
export {};