sdk

commit b65f714457dd6eff1d6cb00b3828fc0c2aa12760
parent 52e1cfff74b8d7720d5bac84bc2367cc8c5edee4
Author: triesap <tyson@radroots.org>
Date:   Tue,  7 Jul 2026 08:33:50 +0000

transport: reject custom Reticulum preview targets

Diffstat:
M
crates/sdk/src/transport.rs
 | 
14
+++++++++++++-
M
crates/sdk/tests/unit/transport_tests.rs
 | 
15
+++++++++++++++

2 files changed, 28 insertions(+), 1 deletion(-)
diff --git a/crates/sdk/src/transport.rs b/crates/sdk/src/transport.rs
@@ -16,6 +16,7 @@ pub use radroots_transport::{
 };
 
 pub const SDK_TRANSPORT_TARGET_MAX_COUNT: usize = 20;
+const RETICULUM_PREVIEW_ENDPOINT_URI: &str = "reticulum:preview-unavailable";
 
 #[derive(Clone, Copy, Debug, PartialEq, Eq, serde::Serialize)]
 #[serde(rename_all = "snake_case")]
@@ -234,6 +235,17 @@ impl TargetSet {
                 targets.len(),
             ));
         }
+        for target in &targets {
+            if target.kind == RadrootsTransportKind::Reticulum
+                && target.uri.as_str() != RETICULUM_PREVIEW_ENDPOINT_URI
+            {
+                return Err(RadrootsSdkError::InvalidRequest {
+                    message: format!(
+                        "Reticulum preview endpoint must be {RETICULUM_PREVIEW_ENDPOINT_URI}"
+                    ),
+                });
+            }
+        }
         let canonical_targets = targets
             .iter()
             .map(|target| {
@@ -296,7 +308,7 @@ pub struct ReticulumPreviewProfile {
 impl ReticulumPreviewProfile {
     pub fn preview_unavailable() -> Self {
         Self {
-            endpoint_uri: "reticulum:preview-unavailable".to_owned(),
+            endpoint_uri: RETICULUM_PREVIEW_ENDPOINT_URI.to_owned(),
             behavior: ReticulumPreviewBehavior::RejectDeliveryAttempts,
         }
     }
diff --git a/crates/sdk/tests/unit/transport_tests.rs b/crates/sdk/tests/unit/transport_tests.rs
@@ -3,6 +3,7 @@ use super::{
     ReticulumPreviewProfile, SatisfactionPolicy, TargetPolicy, TargetSet, TransportProfile,
 };
 use crate::{RadrootsSdkError, SDK_TRANSPORT_TARGET_MAX_COUNT};
+use radroots_transport::{RadrootsTransportKind, RadrootsTransportTarget};
 
 #[path = "../support/serializer_failure.rs"]
 mod serializer_failure;
@@ -197,6 +198,20 @@ fn reticulum_preview_profile_uses_canonical_endpoint_and_behavior_names() {
 }
 
 #[test]
+fn explicit_target_sets_reject_noncanonical_reticulum_preview_endpoints() {
+    let err = TargetSet::transport_targets(vec![
+        RadrootsTransportTarget::new(
+            RadrootsTransportKind::Reticulum,
+            "reticulum:preview-unavailable-alt",
+        )
+        .expect("target"),
+    ])
+    .expect_err("noncanonical Reticulum endpoint");
+
+    assert!(matches!(err, RadrootsSdkError::InvalidRequest { .. }));
+}
+
+#[test]
 fn normalized_relays_reject_empty_and_over_limit_sets() {
     assert!(matches!(
         TargetSet::from_normalized_nostr_relays(Vec::new()),