import { type EthSignature } from './secp.js';
/**
 * EIP-191 personal_sign: keccak256("\x19Ethereum Signed Message:\n" + len + message).
 *
 * `message` is treated as opaque bytes. If you have a string, encode it to UTF-8 first.
 */
export declare function personalSignDigest(message: Buffer | Uint8Array): Buffer;
/**
 * EIP-191 personal_sign returning a 65-byte serialized sig (r || s || v) where v = recovery + 27.
 */
export declare function personalSign(message: Buffer | Uint8Array, privateKey: Buffer | Uint8Array): Buffer;
/**
 * Serialize an EthSignature to the 65-byte form used by personal_sign / eth_sign_typed_data:
 * r (32) || s (32) || v (1, where v = recovery + 27).
 */
export declare function serializeEthSignature(sig: EthSignature): Buffer;
export declare function deserializeEthSignature(bytes: Buffer | Uint8Array): EthSignature;
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