declare const ED25519_SIGNATURE_LENGTH = 64;
declare const ED25519_PUBLIC_KEY_LENGTH = 32;
/**
 * Generate an Ed25519 keypair
 * @returns Object containing 32-byte private key and 32-byte public key
 */
declare function generateKeypair(): {
    privateKey: Uint8Array;
    publicKey: Uint8Array;
};
/**
 * Sign a message using Ed25519
 * @param privateKey - 32-byte private key
 * @param message - Message to sign
 * @returns 64-byte Ed25519 signature
 */
declare function signMessage(privateKey: Uint8Array, message: Uint8Array): Uint8Array;
/**
 * Verify an Ed25519 signature
 * @param publicKey - 32-byte public key
 * @param message - Original message
 * @param signature - 64-byte signature to verify
 * @returns true if signature is valid, false otherwise
 */
declare function verifySignature(publicKey: Uint8Array, message: Uint8Array, signature: Uint8Array): boolean;
/**
 * Convert hex string to Uint8Array
 */
declare function hexToBytes(hex: string): Uint8Array;
/**
 * Convert Uint8Array to hex string
 */
declare function bytesToHex(bytes: Uint8Array): string;

export { ED25519_PUBLIC_KEY_LENGTH, ED25519_SIGNATURE_LENGTH, bytesToHex, generateKeypair, hexToBytes, signMessage, verifySignature };