5 files changed, 21 insertions, 0 deletions
diff --git a/src/transport/firewall.rs b/src/transport/firewall.rs
index c8592bd..23d91fe 100644
--- a/src/transport/firewall.rs
+++ b/src/transport/firewall.rs
@@ -65,6 +65,10 @@ impl Transport for FirewallTransport {
         self.inner.local_id()
     }
 
+    fn is_peer_id(&self, id: &str) -> bool {
+        self.inner.is_peer_id(id)
+    }
+
     async fn resolve_seed(&self, seed: &str) -> Result<String> {
         self.inner.resolve_seed(seed).await
     }
diff --git a/src/transport/mod.rs b/src/transport/mod.rs
index 14c5ee4..b2ce63f 100644
--- a/src/transport/mod.rs
+++ b/src/transport/mod.rs
@@ -323,6 +323,10 @@ pub trait Transport: Send + Sync {
     /// This node's identity on the transport (for Mycelium: its public key).
     fn local_id(&self) -> &str;
 
+    /// Whether `id` can be a node's identity on this transport (for Mycelium: a public
+    /// key). Identities other peers name to us (in a HELLO_REPLY) are checked with it.
+    fn is_peer_id(&self, id: &str) -> bool;
+
     /// Resolves a seed (anything that leads to a node, e.g. an address) to that node's
     /// identity, as `local_id` gives it on that node.
     async fn resolve_seed(&self, seed: &str) -> Result<String>;
diff --git a/src/transport/mycelium/mod.rs b/src/transport/mycelium/mod.rs
index cbae567..0b74793 100644
--- a/src/transport/mycelium/mod.rs
+++ b/src/transport/mycelium/mod.rs
@@ -168,6 +168,10 @@ impl Transport for MyceliumTransport {
         &self.local_id
     }
 
+    fn is_peer_id(&self, id: &str) -> bool {
+        is_pubkey(id)
+    }
+
     async fn resolve_seed(&self, hint: &str) -> Result<String> {
         if is_pubkey(hint) {
             return Ok(hint.to_owned());
diff --git a/src/transport/sim.rs b/src/transport/sim.rs
index 675f382..05160f8 100644
--- a/src/transport/sim.rs
+++ b/src/transport/sim.rs
@@ -255,6 +255,11 @@ impl Transport for SimTransport {
         &self.id
     }
 
+    /// Any name will do.
+    fn is_peer_id(&self, id: &str) -> bool {
+        !id.is_empty()
+    }
+
     /// A seed is a node ID; one no node has doesn't resolve (yet).
     async fn resolve_seed(&self, seed: &str) -> Result<String> {
         if self.net.is_known(seed) {
diff --git a/src/transport/traffic.rs b/src/transport/traffic.rs
index 3d17860..78c5fee 100644
--- a/src/transport/traffic.rs
+++ b/src/transport/traffic.rs
@@ -138,6 +138,10 @@ impl Transport for CountingTransport {
         self.inner.local_id()
     }
 
+    fn is_peer_id(&self, id: &str) -> bool {
+        self.inner.is_peer_id(id)
+    }
+
     async fn resolve_seed(&self, seed: &str) -> Result<String> {
         self.inner.resolve_seed(seed).await
     }