Relay/RelayClient/Crypto/KeyStorage.cs

namespace RelayClient.Crypto;

public static class KeyStorage
{
    public static void SavePrivateKey(string username, string privateKey)
    {
        Directory.CreateDirectory("keys");
        File.WriteAllText(Path.Combine("keys", $"{username}.private.key"), privateKey);
    }

    public static string LoadPrivateKey(string username)
    {
        return File.ReadAllText(Path.Combine("keys", $"{username}.private.key"));
    }

    public static bool PrivateKeyExists(string username)
    {
        return File.Exists(Path.Combine("keys", $"{username}.private.key"));
    }
}