refactor: add check_nakamoto_no_missing_blocks func

This function can be used to check for missing burn blocks, ignoring a
block missing during the transition to epoch 3.0.

testnet/stacks-node/src/tests/nakamoto_integrations.rs

@@ -14,6 +14,7 @@
 // You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 use std::collections::{BTreeMap, HashMap, HashSet};
+use std::ops::RangeBounds;
 use std::sync::atomic::{AtomicU64, Ordering};
 use std::sync::mpsc::{channel, Receiver, Sender};
 use std::sync::{Arc, Mutex};
@@ -1488,6 +1489,26 @@ fn wait_for_first_naka_block_commit(timeout_secs: u64, naka_commits_submitted: &
     }
 }
 
+// Check for missing burn blocks in `range`, but allow for a missed block at
+// the epoch 3 transition. Panic if any other blocks are missing.
+fn check_nakamoto_no_missing_blocks(conf: &Config, range: impl RangeBounds<u64>) {
+    let epoch_3 = &conf.burnchain.epochs.as_ref().unwrap()[StacksEpochId::Epoch30];
+    let missing = test_observer::get_missing_burn_blocks(range).unwrap();
+    let missing_is_error: Vec<_> = missing
+        .into_iter()
+        .filter(|&i| {
+            (i != epoch_3.start_height - 1) || {
+                warn!("Missing burn block {} at epoch 3 transition", i);
+                false
+            }
+        })
+        .collect();
+
+    if !missing_is_error.is_empty() {
+        panic!("Missing the following burn blocks: {missing_is_error:?}");
+    }
+}
+
 #[test]
 #[ignore]
 /// This test spins up a nakamoto-neon node.
@@ -1689,27 +1710,8 @@ fn simple_neon_integration() {
     assert!(tip.stacks_block_height >= block_height_pre_3_0 + 30);
 
     // Check that we aren't missing burn blocks (except during the Nakamoto transition)
-    let epoch_3 = &naka_conf.burnchain.epochs.unwrap()[StacksEpochId::Epoch30];
     let bhh = u64::from(tip.burn_header_height);
-    let missing = test_observer::get_missing_burn_blocks(220..=bhh).unwrap();
-
-    // This test was flaky because it was sometimes missing burn block 230, which is right at the Nakamoto transition
-    // So it was possible to miss a burn block during the transition
-    // But I don't think it matters at this point since the Nakamoto transition has already happened on mainnet
-    // So just print a warning instead, don't count it as an error
-    let missing_is_error: Vec<_> = missing
-        .into_iter()
-        .filter(|&i| {
-            (i != epoch_3.start_height - 1) || {
-                warn!("Missing burn block {} at epoch 3 transition", i);
-                false
-            }
-        })
-        .collect();
-
-    if !missing_is_error.is_empty() {
-        panic!("Missing the following burn blocks: {missing_is_error:?}");
-    }
+    check_nakamoto_no_missing_blocks(&naka_conf, 220..=bhh);
 
     // make sure prometheus returns an updated number of processed blocks
     #[cfg(feature = "monitoring_prom")]
@@ -10106,22 +10108,8 @@ fn skip_mining_long_tx() {
     assert_eq!(sender_1_nonce, 4);
 
     // Check that we aren't missing burn blocks (except during the Nakamoto transition)
-    let epoch_3 = &naka_conf.burnchain.epochs.unwrap()[StacksEpochId::Epoch30];
     let bhh = u64::from(tip.burn_header_height);
-    let missing = test_observer::get_missing_burn_blocks(220..=bhh).unwrap();
-    let missing_is_error: Vec<_> = missing
-        .into_iter()
-        .filter(|&i| {
-            (i != epoch_3.start_height - 1) || {
-                warn!("Missing burn block {} at epoch 3 transition", i);
-                false
-            }
-        })
-        .collect();
-
-    if !missing_is_error.is_empty() {
-        panic!("Missing the following burn blocks: {missing_is_error:?}");
-    }
+    check_nakamoto_no_missing_blocks(&naka_conf, 220..=bhh);
 
     check_nakamoto_empty_block_heuristics();