Fix iteration order in onBlobsSidecarsByRange (#4876)

ChainSafe · Dec 7, 2022 · 4115f67 · 4115f67 · github-actions · Dec 7, 2022
1 parent 17c4d85
commit 4115f67
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/packages/beacon-node/src/network/reqresp/handlers/blobsSidecarsByRange.ts b/packages/beacon-node/src/network/reqresp/handlers/blobsSidecarsByRange.ts
@@ -61,7 +61,9 @@ export async function* onBlobsSidecarsByRange(
     const headChain = chain.forkChoice.getAllAncestorBlocks(headRoot);
 
     // Iterate head chain with ascending block numbers
-    for (const block of headChain) {
+    for (let i = headChain.length - 1; i >= 0; i--) {
+      const block = headChain[i];
+
       // Must include only blocks in the range requested
       if (block.slot >= startSlot && block.slot < endSlot) {
         // Note: Here the forkChoice head may change due to a re-org, so the headChain reflects the cannonical chain