blockwatch: don't log backfilling statement when no blocks have elapsed

CHANGELOG_PENDING.md

@@ -8,6 +8,8 @@
 
 - \#1810 Display "n/a" in CLI when max gas price isn't specified (@kyriediculous)
 - \#1827 Limit the maximum size of a segment read over HTTP (@jailuthra)
+- \#1809 Don't log statement that blocks have been backfilled when no blocks have elapsed
+- \#1809 Avoid nil pointer error in SyncToLatestBlock when no blocks are present in the database (@kyriediculous)
 
 #### Orchestrator
 

eth/blockwatch/block_watcher.go

@@ -159,6 +159,10 @@ func (w *Watcher) syncToLatestBlock() error {
 		return err
 	}
 
+	if lastSeenHeader == nil {
+		return w.pollNextBlock()
+	}
+
 	for i := lastSeenHeader.Number; i.Cmp(newestHeader.Number) < 0; i = i.Add(i, big.NewInt(1)) {
 		if err := w.pollNextBlock(); err != nil {
 			return err
@@ -332,7 +336,7 @@ func (w *Watcher) getMissedEventsToBackfill(ctx context.Context) ([]*Event, erro
 		return events, nil
 	}
 
-	if blocksElapsed = latestBlockNum - startBlockNum; blocksElapsed == 0 {
+	if blocksElapsed = latestBlockNum - startBlockNum; blocksElapsed <= 0 {
 		return events, nil
 	}