/**
 * Node.js implementation of ECIES using native secp256k1 for performance
 *
 * @remarks
 * Uses native secp256k1 bindings for all elliptic curve operations.
 * Uses Node.js crypto module for hashing and AES operations.
 * Provides Uint8Array-only interface with no Buffer exposure.
 */
import { BaseECIESUint8 } from "./base";
/**
 * Node.js-specific ECIES provider using native secp256k1
 *
 * @remarks
 * This implementation:
 * - Uses native secp256k1 for all EC operations (optimal performance)
 * - Uses Node.js crypto for SHA-512, HMAC, and AES operations
 * - Internally works with Uint8Array
 * - Only uses Buffer at crypto API boundaries
 */
export declare class NodeECIESUint8Provider extends BaseECIESUint8 {
    private readonly identityHashFn;
    protected generateRandomBytes(length: number): Uint8Array;
    protected verifyPrivateKey(privateKey: Uint8Array): boolean;
    protected createPublicKey(privateKey: Uint8Array, compressed: boolean): Uint8Array | null;
    protected validatePublicKey(publicKey: Uint8Array): boolean;
    protected decompressPublicKey(publicKey: Uint8Array): Uint8Array | null;
    protected performECDH(publicKey: Uint8Array, privateKey: Uint8Array): Uint8Array;
    protected sha512(data: Uint8Array): Uint8Array;
    protected hmacSha256(key: Uint8Array, data: Uint8Array): Uint8Array;
    protected aesEncrypt(key: Uint8Array, iv: Uint8Array, plaintext: Uint8Array): Promise<Uint8Array>;
    protected aesDecrypt(key: Uint8Array, iv: Uint8Array, ciphertext: Uint8Array): Promise<Uint8Array>;
    /**
     * Normalizes a public key to uncompressed format (65 bytes with 0x04 prefix).
     * Handles compressed (33 bytes) and uncompressed (65 bytes) formats only.
     *
     * @remarks
     * Strict policy: Does not accept 64-byte raw coordinates to avoid masking
     * malformed data. Callers must provide properly formatted keys.
     *
     * @param publicKey - The public key to normalize (33 or 65 bytes)
     * @returns The normalized uncompressed public key (65 bytes)
     * @throws {Error} When public key format is invalid or decompression fails
     */
    normalizeToUncompressed(publicKey: Uint8Array): Uint8Array;
}