From 644e669a15b54975f7ba7c8872c33e4b694fbee2 Mon Sep 17 00:00:00 2001
From: Simon Wicky <simon@nymtech.net>
Date: Fri, 15 May 2026 12:47:04 +0200
Subject: [PATCH] helper changes

---
 .../src/asymmetric/x25519/serde_helpers.rs     | 18 +++++++++++++++++-
 common/nym-lp-data/src/packet/header.rs        |  2 ++
 2 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/common/crypto/src/asymmetric/x25519/serde_helpers.rs b/common/crypto/src/asymmetric/x25519/serde_helpers.rs
index 14fe273f10..4ba14d7335 100644
--- a/common/crypto/src/asymmetric/x25519/serde_helpers.rs
+++ b/common/crypto/src/asymmetric/x25519/serde_helpers.rs
@@ -1,7 +1,23 @@
 // Copyright 2024 - Nym Technologies SA <contact@nymtech.net>
 // SPDX-License-Identifier: Apache-2.0
 
-use super::PublicKey;
+use super::{PrivateKey, PublicKey};
+
+pub mod bs58_x25519_private_key {
+    use super::*;
+    use serde::{Deserialize, Deserializer, Serializer};
+
+    pub fn serialize<S: Serializer>(key: &PrivateKey, serializer: S) -> Result<S::Ok, S::Error> {
+        serializer.serialize_str(&key.to_base58_string())
+    }
+
+    pub fn deserialize<'de, D: Deserializer<'de>>(
+        deserializer: D,
+    ) -> Result<PrivateKey, D::Error> {
+        let s = String::deserialize(deserializer)?;
+        PrivateKey::from_base58_string(s).map_err(serde::de::Error::custom)
+    }
+}
 
 pub mod bs58_x25519_pubkey {
     use super::*;
diff --git a/common/nym-lp-data/src/packet/header.rs b/common/nym-lp-data/src/packet/header.rs
index f6f573cecb..de3fa9020f 100644
--- a/common/nym-lp-data/src/packet/header.rs
+++ b/common/nym-lp-data/src/packet/header.rs
@@ -120,6 +120,8 @@ pub struct LpHeader {
 }
 
 impl LpHeader {
+    pub const SIZE: usize = OuterHeader::SIZE + InnerHeader::SIZE;
+
     pub fn new(receiver_idx: LpReceiverIndex, counter: u64, protocol_version: u8) -> Self {
         Self {
             outer: OuterHeader {