set next id in bridge events script to event id + 1 (#667) (#681)

(cherry picked from commit 26463ac)

Co-authored-by: Tian <tian@dydx.exchange>

protocol/scripts/bridge_events/bridge_events.go

@@ -110,7 +110,7 @@ func main() {
 	// Iterate over each event and populate the above fields
 	for _, log := range logs {
 		event := libeth.BridgeLogToEvent(log, denom)
-		aei.NextId = lib.Max(aei.NextId, event.Id)
+		aei.NextId = lib.Max(aei.NextId, event.Id+1)
 		aei.EthBlockHeight = lib.Max(aei.EthBlockHeight, log.BlockNumber)
 
 		// Add amount to total bridged amount.