fix: back to start only insufficient confirmation blocks (#374)

Co-authored-by: Raul Jordan <[email protected]>

challenge-manager/edge-tracker/tracker.go

@@ -28,6 +28,7 @@ import (
 var (
  srvlog = log.New("service", "edge-tracker")
  errBadOneStepProof = errors.New("bad one step proof data")
+ errNotYetConfirmable = errors.New("edge is not yet confirmable")
  spawnedCounter = metrics.NewRegisteredCounter("arb/validator/tracker/spawned", nil)
  bisectedCounter = metrics.NewRegisteredCounter("arb/validator/tracker/bisected", nil)
  confirmedCounter = metrics.NewRegisteredCounter("arb/validator/tracker/confirmed", nil)
@@ -215,8 +216,12 @@ func (et *Tracker) Act(ctx context.Context) error {
  }
  wasConfirmed, err := et.tryToConfirm(ctx)
  if err != nil {
- srvlog.Debug("Could not confirm edge yet", err, fields)
- return et.fsm.Do(edgeBackToStart{})
+ fields["err"] = err
+ if errors.Is(err, errNotYetConfirmable) {
+ srvlog.Debug("Edge not yet confirmable", fields)
+ } else {
+ srvlog.Error("Could not check if edge can be confirmed", fields)
+ }
  }
  if wasConfirmed {
  return et.fsm.Do(edgeConfirm{})
@@ -437,7 +442,7 @@ func (et *Tracker) tryToConfirm(ctx context.Context) (bool, error) {
  confirmedCounter.Inc(1)
  return true, nil
  }
- return false, nil
+ return false, errNotYetConfirmable
 }
 
 // Determines the bisection point from parentHeight to toHeight and returns a history