* update transformer to able to recheck headers (#4)

* update transformer to able to recheck headers
* put cap on rechecking header
* integration test for recheck headers
* use enum for recheck headers param; make recheck cap configurable
* update integration tests with new test config
* update omni pkg with new recheck header column type
* update migration with new migration tool and final tweaks needed to accommodate changes in omni pkg

cmd/backfillMakerLogs.go

@@ -22,6 +22,7 @@ import (
 	"github.com/vulcanize/vulcanizedb/libraries/shared"
 	"github.com/vulcanize/vulcanizedb/pkg/datastore/postgres"
 	"github.com/vulcanize/vulcanizedb/pkg/transformers"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/shared/constants"
 )
 
 // backfillMakerLogsCmd represents the backfillMakerLogs command
@@ -50,7 +51,7 @@ func backfillMakerLogs() {
 	watcher := shared.NewEventWatcher(db, blockChain)
 
 	watcher.AddTransformers(transformers.TransformerInitializers())
-	err = watcher.Execute()
+	err = watcher.Execute(constants.HeaderMissing)
 	if err != nil {
 		// TODO Handle watcher error in backfillMakerLogs
 	}

cmd/continuousLogSync.go

@@ -49,6 +49,7 @@ This command expects a light sync to have been run, and the presence of header r
 }
 
 var transformerNames []string
+var recheckHeadersArg bool
 
 func syncMakerLogs() {
 	ticker := time.NewTicker(pollingInterval)
@@ -66,7 +67,11 @@ func syncMakerLogs() {
 	watcher.AddTransformers(initializers)
 
 	for range ticker.C {
-		err = watcher.Execute()
+		if recheckHeadersArg {
+			err = watcher.Execute(constants.HeaderRecheck)
+		} else {
+			err = watcher.Execute(constants.HeaderMissing)
+		}
 		if err != nil {
 			// TODO Handle watcher errors in ContinuousLogSync
 		}
@@ -125,4 +130,5 @@ func buildTransformerInitializerMap() map[string]shared2.TransformerInitializer
 func init() {
 	rootCmd.AddCommand(continuousLogSyncCmd)
 	continuousLogSyncCmd.Flags().StringSliceVar(&transformerNames, "transformers", []string{"all"}, "transformer names to be run during this command")
+	continuousLogSyncCmd.Flags().BoolVar(&recheckHeadersArg, "recheckHeaders", false, "checks headers that are already checked for each transformer.")
 }