import { type Encrypted, type PreEncryptOpts } from "./helpers.js";
/**
 * Encrypts a message with ECIES.
 * @param publicKeyTo Recipient public key bytes.
 * @param msg Plaintext bytes.
 * @param opts Optional encryption overrides.
 * @returns Encrypted payload.
 */
export declare function encrypt(publicKeyTo: Uint8Array, msg: Uint8Array, opts?: Partial<PreEncryptOpts>): Promise<Encrypted>;
/**
 * Decrypts an ECIES payload.
 * @param privateKey Recipient private key bytes.
 * @param opts Encrypted payload.
 * @returns Decrypted plaintext bytes.
 */
export declare function decrypt(privateKey: Uint8Array, opts: Encrypted): Promise<Uint8Array>;
/**
 * Encrypts a message with ECIES using sync primitives.
 * @param publicKeyTo Recipient public key bytes.
 * @param msg Plaintext bytes.
 * @param opts Optional encryption overrides.
 * @returns Encrypted payload.
 */
export declare function encryptSync(publicKeyTo: Uint8Array, msg: Uint8Array, opts?: Partial<PreEncryptOpts>): Encrypted;
/**
 * Decrypts an ECIES payload using sync primitives.
 * @param privateKey Recipient private key bytes.
 * @param opts Encrypted payload.
 * @returns Decrypted plaintext bytes.
 */
export declare function decryptSync(privateKey: Uint8Array, opts: Encrypted): Uint8Array;
/**
 * Serializes an encrypted payload into a single byte array.
 * @param opts Encrypted payload.
 * @returns Serialized payload bytes.
 */
export declare function serialize(opts: Encrypted): Uint8Array;
/**
 * Deserializes a byte array into an encrypted payload object.
 * @param buf Serialized payload bytes.
 * @returns Encrypted payload.
 */
export declare function deserialize(buf: Uint8Array): Encrypted;
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