import type { WalletSigner } from '../types';
/**
 * Signs a message with the provided signer and returns a serialized signature
 * suitable for IMX registration and authorization.
 *
 * This is inlined from @imtbl/toolkit to avoid ethers dependency.
 *
 * @param payload - The message to sign
 * @param signer - A WalletSigner implementation
 * @returns The serialized signature as a hex string
 */
export declare function signRaw(payload: string, signer: WalletSigner): Promise<string>;