/**
 * ECIES service access for blocks to avoid circular dependencies
 * Updated to use new @digitaldefiance/ecies-lib API
 */
export declare class BlockECIES {
    static encrypt(receiverPublicKey: Uint8Array, message: Uint8Array): Promise<Uint8Array>;
    static decrypt(privateKey: Uint8Array, encryptedData: Uint8Array): Promise<Uint8Array>;
    static decryptWithComponents(privateKey: Uint8Array, ephemeralPublicKey: Uint8Array, iv: Uint8Array, authTag: Uint8Array, encrypted: Uint8Array): Promise<{
        decrypted: Uint8Array;
        ciphertextLength?: number;
    }>;
}
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