From 1dcf40f06c27f4deff73df204dc05fbf999234f5 Mon Sep 17 00:00:00 2001
From: tv <tv@krebsco.de>
Date: Thu, 22 Oct 2026 20:37:34 +0200
Subject: introduce pre-shared swarm key

---
 src/transport/mod.rs      | 4 ++++
 src/transport/mycelium.rs | 8 ++++++++
 2 files changed, 12 insertions(+)

(limited to 'src/transport')

diff --git a/src/transport/mod.rs b/src/transport/mod.rs
index 0afb5ee..58db611 100644
--- a/src/transport/mod.rs
+++ b/src/transport/mod.rs
@@ -43,6 +43,8 @@ impl ParsedMessage {
 #[derive(Debug, Clone)]
 pub struct HelloRequest {
     pub epoch: Epoch,
+    /// Proof of the swarm key (`swarm::auth`); empty without one.
+    pub auth: Vec<u8>,
 }
 
 #[derive(Debug, Clone)]
@@ -50,6 +52,8 @@ pub struct HelloReply {
     pub swarm_id: String,
     pub peers: Vec<String>,
     pub epoch: Epoch,
+    /// Proof of the swarm key (`swarm::auth`); empty without one.
+    pub auth: Vec<u8>,
 }
 
 #[derive(Debug, Clone)]
diff --git a/src/transport/mycelium.rs b/src/transport/mycelium.rs
index 194f998..057916f 100644
--- a/src/transport/mycelium.rs
+++ b/src/transport/mycelium.rs
@@ -851,6 +851,8 @@ fn bytes_to_keepalive(bytes: &[u8]) -> Result<Keepalive, TransportError> {
 pub struct HelloRequestShadow {
     #[serde(default)]
     epoch: EpochShadow,
+    #[serde(default)]
+    auth: ByteBuf,
 }
 
 #[derive(Serialize, Deserialize)]
@@ -861,6 +863,8 @@ pub struct HelloReplyShadow<'a> {
     pub peers: Vec<String>,
     #[serde(default)]
     epoch: EpochShadow,
+    #[serde(default)]
+    auth: ByteBuf,
 }
 
 #[derive(Serialize, Deserialize)]
@@ -905,12 +909,14 @@ mod automerge_msg_codec {
 pub fn hello_request_to_bytes(msg: &HelloRequest) -> Result<Vec<u8>, rmp_serde::encode::Error> {
     rmp_serde::to_vec(&HelloRequestShadow {
         epoch: epoch_to_shadow(&msg.epoch),
+        auth: ByteBuf::from(msg.auth.clone()),
     })
 }
 pub fn bytes_to_hello_request(bytes: &[u8]) -> Result<HelloRequest, TransportError> {
     let shadow: HelloRequestShadow = rmp_serde::from_slice(bytes)?;
     Ok(HelloRequest {
         epoch: epoch_from_shadow(shadow.epoch)?,
+        auth: shadow.auth.into_vec(),
     })
 }
 
@@ -920,6 +926,7 @@ pub fn hello_reply_to_bytes(msg: &HelloReply) -> Result<Vec<u8>, rmp_serde::enco
         swarm_id: Cow::Borrowed(&msg.swarm_id),
         peers: msg.peers.clone(), // Vec must be cloned for serialization wrapper matching
         epoch: epoch_to_shadow(&msg.epoch),
+        auth: ByteBuf::from(msg.auth.clone()),
     };
     rmp_serde::to_vec(&shadow)
 }
@@ -929,6 +936,7 @@ pub fn bytes_to_hello_reply(bytes: &[u8]) -> Result<HelloReply, TransportError>
         swarm_id: shadow.swarm_id.into_owned(),
         peers: shadow.peers,
         epoch: epoch_from_shadow(shadow.epoch)?,
+        auth: shadow.auth.into_vec(),
     })
 }
 
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