import { type Hex } from "viem";
import type { SmartAccountSigner } from "@aa-sdk/core";
import type { WebAuthnPublicKey } from "@alchemy/wallet-api-types";
import type { ToWebAuthnAccountParameters } from "viem/account-abstraction";
import type { WebAuthnSigner } from "./client";
export type Expect<T extends true> = T;
export declare const assertNever: (_val: never, msg: string) => never;
/**
 * If the value is already Hex, it is returned unchanged. If it's a string, number or bigint, it's converted.
 *
 * @param {string | number | bigint | Hex} val - The value to convert to Hex.
 * @returns {Hex} The Hex value.
 *
 * @example
 * ```ts
 * const hex = castToHex("0x1234");
 * const hex2 = castToHex(1234);
 * const hex3 = castToHex(BigInt(1234));
 * ```
 */
export declare const castToHex: (val: string | number | bigint | Hex) => Hex;
export declare function isWebAuthnSigner(signer: SmartAccountSigner | WebAuthnSigner): signer is WebAuthnSigner;
export declare function credentialToWebAuthnPublicKey(credential: ToWebAuthnAccountParameters["credential"]): WebAuthnPublicKey;