Merge dc3b207 into 4d89a0e

ChainSafe · Mar 9, 2023 · 2ebc877 · 2ebc877
2 parents 4d89a0e + dc3b207
commit 2ebc877
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/packages/light-client/src/spec/validateLightClientUpdate.ts b/packages/light-client/src/spec/validateLightClientUpdate.ts
@@ -113,7 +113,7 @@ export function validateLightClientUpdate(
 
   const signingRoot = ssz.phase0.SigningData.hashTreeRoot({
     objectRoot: ssz.phase0.BeaconBlockHeader.hashTreeRoot(update.attestedHeader.beacon),
-    domain: store.config.getDomain(update.signatureSlot, DOMAIN_SYNC_COMMITTEE),
+    domain: store.config.getDomain(update.signatureSlot - 1, DOMAIN_SYNC_COMMITTEE),
   });
 
   if (!isValidBlsAggregate(participantPubkeys, signingRoot, update.syncAggregate.syncCommitteeSignature)) {