/// <summary>
/// Create new Ed25519 signature
/// </summary>
/// <param name="signature">
/// Buffer for signature
/// </param>
/// <param name="message">
/// Message bytes
/// </param>
/// <param name="expandedPrivateKey">
/// Expanded form of private key
/// </param>
public static void Sign(ArraySegment <byte> signature, ArraySegment <byte> message,
ArraySegment <byte> expandedPrivateKey)
{
Ed25519Operations.CryptoSign(signature.Array, signature.Offset, message.Array, message.Offset,
message.Count, expandedPrivateKey.Array, expandedPrivateKey.Offset);
}