bug: fix activation after leave

gateway/src/subnet.rs

@@ -47,6 +47,8 @@ impl Subnet {
         self.stake += value;
         if self.stake < st.min_stake {
             self.status = Status::Inactive;
+        } else {
+            self.status = Status::Active;
         }
         st.flush_subnet(rt.store(), self)?;
         Ok(())

gateway/tests/gateway_test.rs

@@ -208,6 +208,11 @@ fn release_stake() {
         ExitCode::USR_ILLEGAL_STATE,
     )
     .unwrap();
+
+    // Add some stake to see if we activate again
+    h.add_stake(&mut rt, &shid, &value, ExitCode::OK).unwrap();
+    let subnet = h.get_subnet(&rt, &shid).unwrap();
+    assert_eq!(subnet.status, Active);
 }
 
 #[test]

subnet-actor/src/lib.rs

@@ -266,6 +266,11 @@ impl SubnetActor for Actor {
             return Err(actor_error!(illegal_state, "not validator"));
         }
 
+        // always translate to f0-based SubnetID
+        let mut ch = ch;
+        ch.enforce_f0_source(rt)
+            .map_err(|_| actor_error!(illegal_argument, "cannot translate source subnetID"))?;
+
         state
             .verify_checkpoint(rt, &ch)
             .map_err(|e| actor_error!(illegal_state, format!("checkpoint failed: {}", e)))?;