/**
 * Opacus Key Manager
 * Handles Ed25519 signing keys and X25519 encryption keys
 */
import { AgentIdentity } from '../types';
export declare class KeyManager {
    /**
     * Generate complete key pair (Ed25519 + X25519)
     */
    static generateKeyPair(): Promise<{
        signing: {
            pub: Uint8Array;
            priv: Uint8Array;
        };
        encryption: {
            pub: Uint8Array;
            priv: Uint8Array;
        };
    }>;
    /**
     * Generate Ed25519 key pair for signatures
     */
    static generateEd25519(): Promise<{
        pub: Uint8Array;
        priv: Uint8Array;
    }>;
    /**
     * Generate X25519 key pair for ECDH
     */
    static generateX25519(): {
        pub: Uint8Array;
        priv: Uint8Array;
    };
    /**
     * Generate full agent identity with both key pairs
     */
    static generateFullIdentity(chainId?: number): Promise<AgentIdentity>;
    /**
     * Convert bytes to hex string
     */
    static toHex(bytes: Uint8Array): string;
    /**
     * Convert hex string to bytes
     */
    static fromHex(hex: string): Uint8Array;
    /**
     * Export identity to JSON
     */
    static exportIdentity(identity: AgentIdentity): string;
    /**
     * Import identity from JSON
     */
    static importIdentity(json: string): AgentIdentity;
}
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