1 files changed, 12 insertions, 4 deletions
diff --git a/src/transport/identity.rs b/src/transport/identity.rs
index 712e1f9..6f000d0 100644
--- a/src/transport/identity.rs
+++ b/src/transport/identity.rs
@@ -49,6 +49,17 @@ const MAX_HINTS: usize = 8;
 /// anyone can send us proofs (keys are free), so the books are bounded.
 const MAX_ENTRIES: usize = 4096;
 
+/// A send refused because the peer hasn't proven where it is yet (`send_encoded`):
+/// expected when a peer known only from hints is first contacted, and retried.
+#[derive(Debug, thiserror::Error)]
+#[error("{0} hasn't proven where it is yet; asked where it is said to be")]
+pub(crate) struct NotProven(String);
+
+/// Whether `error` is (or was caused by) a [`NotProven`].
+pub(crate) fn is_not_proven(error: &anyhow::Error) -> bool {
+    error.chain().any(|cause| cause.is::<NotProven>())
+}
+
 /// What a node under the identity layer needs (`node::NodeConfig::identity`).
 #[derive(Clone)]
 pub(crate) struct IdentityConfig {
@@ -426,10 +437,7 @@ impl Transport for IdentityTransport {
             for target in hints {
                 self.shared.ask(&target, false);
             }
-            bail!(
-                "{} hasn't proven where it is yet; asked where it is said to be",
-                message.peer
-            );
+            return Err(NotProven(message.peer.clone()).into());
         }
         let mut inner = message.clone();
         inner.peer = message.address.clone();