private boolean isInSync(final ChainHead localChain, final ChainHeadEstimate remoteChain) {
    return isInSync(localChain, remoteChain, syncTolerance);
  }
Tracks the sync status of this node within the specified {@code syncTolerance}.
ethereum/eth/src/main/java/org/hyperledger/besu/ethereum/eth/sync/state/InSyncTracker.java