Merge pull request #101 from vulcanize/update-transformer-execute

VDB-696 Update transformer execute

libraries/shared/factories/event/repository.go

@@ -17,14 +17,11 @@
 package event
 
 import (
-	"github.com/vulcanize/vulcanizedb/pkg/core"
 	"github.com/vulcanize/vulcanizedb/pkg/datastore/postgres"
 )
 
 type Repository interface {
 	Create(headerID int64, models []interface{}) error
 	MarkHeaderChecked(headerID int64) error
-	MissingHeaders(startingBlockNumber, endingBlockNumber int64) ([]core.Header, error)
-	RecheckHeaders(startingBlockNumber, endingBlockNUmber int64) ([]core.Header, error)
 	SetDB(db *postgres.DB)
 }

libraries/shared/factories/event/transformer.go

@@ -20,7 +20,6 @@ import (
 	"github.com/ethereum/go-ethereum/core/types"
 	log "github.com/sirupsen/logrus"
 
-	"github.com/vulcanize/vulcanizedb/libraries/shared/constants"
 	"github.com/vulcanize/vulcanizedb/libraries/shared/transformer"
 	"github.com/vulcanize/vulcanizedb/pkg/core"
 	"github.com/vulcanize/vulcanizedb/pkg/datastore/postgres"
@@ -37,7 +36,7 @@ func (transformer Transformer) NewTransformer(db *postgres.DB) transformer.Event
 	return transformer
 }
 
-func (transformer Transformer) Execute(logs []types.Log, header core.Header, recheckHeaders constants.TransformerExecution) error {
+func (transformer Transformer) Execute(logs []types.Log, header core.Header) error {
 	transformerName := transformer.Config.TransformerName
 	config := transformer.Config
 

libraries/shared/factories/event/transformer_test.go

@@ -23,7 +23,6 @@ import (
 	. "github.com/onsi/ginkgo"
 	. "github.com/onsi/gomega"
 
-	"github.com/vulcanize/vulcanizedb/libraries/shared/constants"
 	"github.com/vulcanize/vulcanizedb/libraries/shared/factories/event"
 	"github.com/vulcanize/vulcanizedb/libraries/shared/mocks"
 	"github.com/vulcanize/vulcanizedb/libraries/shared/test_data"
@@ -60,14 +59,14 @@ var _ = Describe("Transformer", func() {
 	})
 
 	It("marks header checked if no logs returned", func() {
-		err := t.Execute([]types.Log{}, headerOne, constants.HeaderMissing)
+		err := t.Execute([]types.Log{}, headerOne)
 
 		Expect(err).NotTo(HaveOccurred())
 		repository.AssertMarkHeaderCheckedCalledWith(headerOne.Id)
 	})
 
 	It("doesn't attempt to convert or persist an empty collection when there are no logs", func() {
-		err := t.Execute([]types.Log{}, headerOne, constants.HeaderMissing)
+		err := t.Execute([]types.Log{}, headerOne)
 
 		Expect(err).NotTo(HaveOccurred())
 		Expect(converter.ToEntitiesCalledCounter).To(Equal(0))
@@ -76,7 +75,7 @@ var _ = Describe("Transformer", func() {
 	})
 
 	It("does not call repository.MarkCheckedHeader when there are logs", func() {
-		err := t.Execute(logs, headerOne, constants.HeaderMissing)
+		err := t.Execute(logs, headerOne)
 
 		Expect(err).NotTo(HaveOccurred())
 		repository.AssertMarkHeaderCheckedNotCalled()
@@ -85,14 +84,14 @@ var _ = Describe("Transformer", func() {
 	It("returns error if marking header checked returns err", func() {
 		repository.SetMarkHeaderCheckedError(fakes.FakeError)
 
-		err := t.Execute([]types.Log{}, headerOne, constants.HeaderMissing)
+		err := t.Execute([]types.Log{}, headerOne)
 
 		Expect(err).To(HaveOccurred())
 		Expect(err).To(MatchError(fakes.FakeError))
 	})
 
 	It("converts an eth log to an entity", func() {
-		err := t.Execute(logs, headerOne, constants.HeaderMissing)
+		err := t.Execute(logs, headerOne)
 
 		Expect(err).NotTo(HaveOccurred())
 		Expect(converter.ContractAbi).To(Equal(config.ContractAbi))
@@ -102,7 +101,7 @@ var _ = Describe("Transformer", func() {
 	It("returns an error if converter fails", func() {
 		converter.ToEntitiesError = fakes.FakeError
 
-		err := t.Execute(logs, headerOne, constants.HeaderMissing)
+		err := t.Execute(logs, headerOne)
 
 		Expect(err).To(HaveOccurred())
 		Expect(err).To(MatchError(fakes.FakeError))
@@ -111,7 +110,7 @@ var _ = Describe("Transformer", func() {
 	It("converts an entity to a model", func() {
 		converter.EntitiesToReturn = []interface{}{test_data.GenericEntity{}}
 
-		err := t.Execute(logs, headerOne, constants.HeaderMissing)
+		err := t.Execute(logs, headerOne)
 
 		Expect(err).NotTo(HaveOccurred())
 		Expect(converter.EntitiesToConvert[0]).To(Equal(test_data.GenericEntity{}))
@@ -121,7 +120,7 @@ var _ = Describe("Transformer", func() {
 		converter.EntitiesToReturn = []interface{}{test_data.GenericEntity{}}
 		converter.ToModelsError = fakes.FakeError
 
-		err := t.Execute(logs, headerOne, constants.HeaderMissing)
+		err := t.Execute(logs, headerOne)
 
 		Expect(err).To(HaveOccurred())
 		Expect(err).To(MatchError(fakes.FakeError))
@@ -130,7 +129,7 @@ var _ = Describe("Transformer", func() {
 	It("persists the record", func() {
 		converter.ModelsToReturn = []interface{}{test_data.GenericModel{}}
 
-		err := t.Execute(logs, headerOne, constants.HeaderMissing)
+		err := t.Execute(logs, headerOne)
 
 		Expect(err).NotTo(HaveOccurred())
 		Expect(repository.PassedHeaderID).To(Equal(headerOne.Id))
@@ -139,7 +138,7 @@ var _ = Describe("Transformer", func() {
 
 	It("returns error if persisting the record fails", func() {
 		repository.SetCreateError(fakes.FakeError)
-		err := t.Execute(logs, headerOne, constants.HeaderMissing)
+		err := t.Execute(logs, headerOne)
 
 		Expect(err).To(HaveOccurred())
 		Expect(err).To(MatchError(fakes.FakeError))

libraries/shared/mocks/transformer.go

@@ -19,7 +19,6 @@ package mocks
 import (
 	"github.com/ethereum/go-ethereum/core/types"
 
-	"github.com/vulcanize/vulcanizedb/libraries/shared/constants"
 	shared_t "github.com/vulcanize/vulcanizedb/libraries/shared/transformer"
 	"github.com/vulcanize/vulcanizedb/pkg/core"
 	"github.com/vulcanize/vulcanizedb/pkg/datastore/postgres"
@@ -33,7 +32,7 @@ type MockTransformer struct {
 	config           shared_t.EventTransformerConfig
 }
 
-func (mh *MockTransformer) Execute(logs []types.Log, header core.Header, recheckHeaders constants.TransformerExecution) error {
+func (mh *MockTransformer) Execute(logs []types.Log, header core.Header) error {
 	if mh.ExecuteError != nil {
 		return mh.ExecuteError
 	}

libraries/shared/repository/repository.go

@@ -69,31 +69,6 @@ func MissingHeaders(startingBlockNumber, endingBlockNumber int64, db *postgres.D
 	return result, err
 }
 
-func RecheckHeaders(startingBlockNumber, endingBlockNumber int64, db *postgres.DB, checkedHeadersColumn string) ([]core.Header, error) {
-	var result []core.Header
-	var query string
-	var err error
-
-	if endingBlockNumber == -1 {
-		query = `SELECT headers.id, headers.block_number, headers.hash FROM headers
-				LEFT JOIN checked_headers on headers.id = header_id
-				WHERE ` + checkedHeadersColumn + ` between 1 and ` + constants.RecheckHeaderCap + `
-				AND headers.block_number >= $1
-				AND headers.eth_node_fingerprint = $2`
-		err = db.Select(&result, query, startingBlockNumber, db.Node.ID)
-	} else {
-		query = `SELECT headers.id, headers.block_number, headers.hash FROM headers
-				LEFT JOIN checked_headers on headers.id = header_id
-				WHERE ` + checkedHeadersColumn + ` between 1 and ` + constants.RecheckHeaderCap + `
-				AND headers.block_number >= $1
-				AND headers.block_number <= $2
-				AND headers.eth_node_fingerprint = $3`
-		err = db.Select(&result, query, startingBlockNumber, endingBlockNumber, db.Node.ID)
-	}
-
-	return result, err
-}
-
 func GetCheckedColumnNames(db *postgres.DB) ([]string, error) {
 	// Query returns `[]driver.Value`, nullable polymorphic interface
 	var queryResult []driver.Value
@@ -121,37 +96,47 @@ func GetCheckedColumnNames(db *postgres.DB) ([]string, error) {
 	return columnNames, nil
 }
 
-// Builds a SQL string that checks if any column value is 0, given the column names.
+// Builds a SQL string that checks if any column should be checked/rechecked.
 // Defaults to FALSE when no columns are provided.
 // Ex: ["columnA", "columnB"] => "NOT (columnA!=0 AND columnB!=0)"
 //     [] => "FALSE"
-func CreateNotCheckedSQL(boolColumns []string, recheckHeaders constants.TransformerExecution) string {
+func CreateHeaderCheckedPredicateSQL(boolColumns []string, recheckHeaders constants.TransformerExecution) string {
-
-	var result bytes.Buffer
-
 	if len(boolColumns) == 0 {
 		return "FALSE"
 	}
 
-	result.WriteString("NOT (")
+	if recheckHeaders {
+		return createHeaderCheckedPredicateSQLForRecheckedHeaders(boolColumns)
+	} else {
+		return createHeaderCheckedPredicateSQLForMissingHeaders(boolColumns)
+	}
+}
+
+func createHeaderCheckedPredicateSQLForMissingHeaders(boolColumns []string) string {
+	var result bytes.Buffer
+	result.WriteString(" (")
 
 	// Loop excluding last column name
 	for _, column := range boolColumns[:len(boolColumns)-1] {
-
+		result.WriteString(fmt.Sprintf("%v=0 OR ", column))
-		if recheckHeaders {
-			result.WriteString(fmt.Sprintf("%v>=%s AND ", column, constants.RecheckHeaderCap))
-		} else {
-			result.WriteString(fmt.Sprintf("%v!=0 AND ", column))
-		}
 	}
 
-	// No trailing "OR" for the last column name
+	result.WriteString(fmt.Sprintf("%v=0)", boolColumns[len(boolColumns)-1]))
-	if recheckHeaders {
+
-		result.WriteString(fmt.Sprintf("%v>=%s)", boolColumns[len(boolColumns)-1], constants.RecheckHeaderCap))
+	return result.String()
-	} else {
+}
-		result.WriteString(fmt.Sprintf("%v!=0)", boolColumns[len(boolColumns)-1]))
+
-
+func createHeaderCheckedPredicateSQLForRecheckedHeaders(boolColumns []string) string {
-	}
+	var result bytes.Buffer
+	result.WriteString(" (")
+
+	// Loop excluding last column name
+	for _, column := range boolColumns[:len(boolColumns)-1] {
+		result.WriteString(fmt.Sprintf("%v<%s OR ", column, constants.RecheckHeaderCap))
+	}
+
+	// No trailing "OR" for the last column name
+	result.WriteString(fmt.Sprintf("%v<%s)", boolColumns[len(boolColumns)-1], constants.RecheckHeaderCap))
 
 	return result.String()
 }

libraries/shared/repository/repository_test.go

@@ -36,12 +36,12 @@ import (
 )
 
 var _ = Describe("Repository", func() {
-	Describe("MarkHeaderChecked", func() {
 	var (
 		checkedHeadersColumn string
 		db                   *postgres.DB
 	)
 
+	Describe("MarkHeaderChecked", func() {
 		BeforeEach(func() {
 			db = test_config.NewTestDB(test_config.NewTestNode())
 			test_config.CleanTestDB(db)
@@ -73,11 +73,6 @@ var _ = Describe("Repository", func() {
 	})
 
 	Describe("MarkHeaderCheckedInTransaction", func() {
-		var (
-			checkedHeadersColumn string
-			db                   *postgres.DB
-		)
-
 		BeforeEach(func() {
 			db = test_config.NewTestDB(test_config.NewTestNode())
 			test_config.CleanTestDB(db)
@@ -114,16 +109,17 @@ var _ = Describe("Repository", func() {
 
 	Describe("MissingHeaders", func() {
 		var (
-			db                       *postgres.DB
 			headerRepository         datastore.HeaderRepository
 			startingBlockNumber      int64
 			endingBlockNumber        int64
 			eventSpecificBlockNumber int64
+			outOfRangeBlockNumber    int64
 			blockNumbers             []int64
 			headerIDs                []int64
 			notCheckedSQL            string
 			err                      error
 			hr                       r2.HeaderRepository
+			columnNames              []string
 		)
 
 		BeforeEach(func() {
@@ -133,14 +129,14 @@ var _ = Describe("Repository", func() {
 			hr = r2.NewHeaderRepository(db)
 			hr.AddCheckColumns(getExpectedColumnNames())
 
-			columnNames, err := shared.GetCheckedColumnNames(db)
+			columnNames, err = shared.GetCheckedColumnNames(db)
 			Expect(err).NotTo(HaveOccurred())
-			notCheckedSQL = shared.CreateNotCheckedSQL(columnNames, constants.HeaderMissing)
+			notCheckedSQL = shared.CreateHeaderCheckedPredicateSQL(columnNames, constants.HeaderMissing)
 
 			startingBlockNumber = rand.Int63()
 			eventSpecificBlockNumber = startingBlockNumber + 1
 			endingBlockNumber = startingBlockNumber + 2
-			outOfRangeBlockNumber := endingBlockNumber + 1
+			outOfRangeBlockNumber = endingBlockNumber + 1
 
 			blockNumbers = []int64{startingBlockNumber, eventSpecificBlockNumber, endingBlockNumber, outOfRangeBlockNumber}
 
@@ -157,6 +153,7 @@ var _ = Describe("Repository", func() {
 		})
 
 		It("only treats headers as checked if the event specific logs have been checked", func() {
+			//add a checked_header record, but don't mark it check for any of the columns
 			_, err = db.Exec(`INSERT INTO public.checked_headers (header_id) VALUES ($1)`, headerIDs[1])
 			Expect(err).NotTo(HaveOccurred())
 
@@ -191,83 +188,47 @@ var _ = Describe("Repository", func() {
 			Expect(nodeTwoMissingHeaders[0].BlockNumber).To(Or(Equal(startingBlockNumber+10), Equal(eventSpecificBlockNumber+10), Equal(endingBlockNumber+10)))
 			Expect(nodeTwoMissingHeaders[1].BlockNumber).To(Or(Equal(startingBlockNumber+10), Equal(eventSpecificBlockNumber+10), Equal(endingBlockNumber+10)))
 		})
+
+		It("handles an ending block of -1 ", func() {
+			endingBlock := int64(-1)
+			headers, err := shared.MissingHeaders(startingBlockNumber, endingBlock, db, notCheckedSQL)
+
+			Expect(err).NotTo(HaveOccurred())
+			Expect(len(headers)).To(Equal(4))
+			Expect(headers[0].BlockNumber).To(Or(Equal(startingBlockNumber), Equal(endingBlockNumber), Equal(eventSpecificBlockNumber), Equal(outOfRangeBlockNumber)))
+			Expect(headers[1].BlockNumber).To(Or(Equal(startingBlockNumber), Equal(endingBlockNumber), Equal(eventSpecificBlockNumber), Equal(outOfRangeBlockNumber)))
+			Expect(headers[2].BlockNumber).To(Or(Equal(startingBlockNumber), Equal(endingBlockNumber), Equal(eventSpecificBlockNumber), Equal(outOfRangeBlockNumber)))
+			Expect(headers[3].BlockNumber).To(Or(Equal(startingBlockNumber), Equal(endingBlockNumber), Equal(eventSpecificBlockNumber), Equal(outOfRangeBlockNumber)))
+
 		})
 
-	Describe("RecheckHeaders", func() {
+		It("when a the `notCheckedSQL` argument allows for rechecks it returns headers where the checked count is less than the maximum", func() {
-		var (
+			columnName := columnNames[0]
-			checkedHeadersColumn                                      string
+			recheckedSQL := shared.CreateHeaderCheckedPredicateSQL([]string{columnName}, constants.HeaderRecheck)
-			db                                                        *postgres.DB
+			// mark every header checked at least once
-			headerOneID, headerTwoID, headerThreeID, headerFourID     int64
+			// header 4 is marked the maximum number of times, it it is not longer checked
-			headerOneErr, headerTwoErr, headerThreeErr, headerFourErr error
-		)
 
-		BeforeEach(func() {
-			db = test_config.NewTestDB(test_config.NewTestNode())
-			test_config.CleanTestDB(db)
-
-			// create header checked column
-			checkedHeadersColumn = "test_column_checked"
-			_, migrateErr := db.Exec(`ALTER TABLE public.checked_headers ADD COLUMN ` + checkedHeadersColumn + ` integer`)
-			Expect(migrateErr).NotTo(HaveOccurred())
-
-			// create headers
-			headerRepository := repositories.NewHeaderRepository(db)
-			headerOneID, headerOneErr = headerRepository.CreateOrUpdateHeader(fakes.GetFakeHeader(1))
-			Expect(headerOneErr).NotTo(HaveOccurred())
-			headerTwoID, headerTwoErr = headerRepository.CreateOrUpdateHeader(fakes.GetFakeHeader(2))
-			Expect(headerTwoErr).NotTo(HaveOccurred())
-			headerThreeID, headerThreeErr = headerRepository.CreateOrUpdateHeader(fakes.GetFakeHeader(3))
-			Expect(headerThreeErr).NotTo(HaveOccurred())
-			headerFourID, headerFourErr = headerRepository.CreateOrUpdateHeader(fakes.GetFakeHeader(4))
-			Expect(headerFourErr).NotTo(HaveOccurred())
-
-			// mark every header checked at least once, with one fully rechecked (headerThree)
 			maxCheckCount, intConversionErr := strconv.Atoi(constants.RecheckHeaderCap)
 			Expect(intConversionErr).NotTo(HaveOccurred())
-			_, markHeaderOneCheckedErr := db.Exec(
-				`INSERT INTO public.checked_headers (header_id, `+checkedHeadersColumn+`) VALUES ($1, $2)`,
-				headerOneID, maxCheckCount)
-			Expect(markHeaderOneCheckedErr).NotTo(HaveOccurred())
-			_, markHeaderTwoCheckedErr := db.Exec(
-				`INSERT INTO public.checked_headers (header_id, `+checkedHeadersColumn+`) VALUES ($1, $2)`,
-				headerTwoID, maxCheckCount)
-			Expect(markHeaderTwoCheckedErr).NotTo(HaveOccurred())
-			_, markHeaderThreeCheckedErr := db.Exec(
-				`INSERT INTO public.checked_headers (header_id, `+checkedHeadersColumn+`) VALUES ($1, $2)`,
-				headerThreeID, maxCheckCount+1)
-			Expect(markHeaderThreeCheckedErr).NotTo(HaveOccurred())
-			_, markHeaderFourCheckedErr := db.Exec(
-				`INSERT INTO public.checked_headers (header_id, `+checkedHeadersColumn+`) VALUES ($1, $2)`,
-				headerFourID, maxCheckCount)
-			Expect(markHeaderFourCheckedErr).NotTo(HaveOccurred())
-		})
 
-		AfterEach(func() {
+			markHeaderOneErr := shared.MarkHeaderChecked(headerIDs[0], db, columnName)
-			_, cleanupMigrateErr := db.Exec(`ALTER TABLE public.checked_headers DROP COLUMN ` + checkedHeadersColumn)
+			Expect(markHeaderOneErr).NotTo(HaveOccurred())
-			Expect(cleanupMigrateErr).NotTo(HaveOccurred())
+			markHeaderTwoErr := shared.MarkHeaderChecked(headerIDs[1], db, columnName)
-		})
+			Expect(markHeaderTwoErr).NotTo(HaveOccurred())
+			markHeaderThreeErr := shared.MarkHeaderChecked(headerIDs[2], db, columnName)
+			Expect(markHeaderThreeErr).NotTo(HaveOccurred())
+			for i := 0; i <= maxCheckCount; i++ {
+				markHeaderFourErr := shared.MarkHeaderChecked(headerIDs[3], db, columnName)
+				Expect(markHeaderFourErr).NotTo(HaveOccurred())
+			}
 
-		Describe("when no ending block number (ending block number == -1)", func() {
+			headers, err := shared.MissingHeaders(1, -1, db, recheckedSQL)
-			It("returns all headers since starting block where checked count is less than cap", func() {
-				headers, err := shared.RecheckHeaders(1, -1, db, checkedHeadersColumn)
 
 			Expect(err).NotTo(HaveOccurred())
 			Expect(len(headers)).To(Equal(3))
-				Expect(headers[0].Id).To(Or(Equal(headerOneID), Equal(headerTwoID), Equal(headerFourID)))
+			Expect(headers[0].Id).To(Or(Equal(headerIDs[0]), Equal(headerIDs[1]), Equal(headerIDs[2])))
-				Expect(headers[1].Id).To(Or(Equal(headerOneID), Equal(headerTwoID), Equal(headerFourID)))
+			Expect(headers[1].Id).To(Or(Equal(headerIDs[0]), Equal(headerIDs[1]), Equal(headerIDs[2])))
-				Expect(headers[2].Id).To(Or(Equal(headerOneID), Equal(headerTwoID), Equal(headerFourID)))
+			Expect(headers[2].Id).To(Or(Equal(headerIDs[0]), Equal(headerIDs[1]), Equal(headerIDs[2])))
-			})
-		})
-
-		Describe("when ending block number specified", func() {
-			It("returns headers between starting and ending block where checked count is less than cap", func() {
-				headers, err := shared.RecheckHeaders(1, 3, db, checkedHeadersColumn)
-
-				Expect(err).NotTo(HaveOccurred())
-				Expect(len(headers)).To(Equal(2))
-				Expect(headers[0].Id).To(Or(Equal(headerOneID), Equal(headerTwoID)))
-				Expect(headers[1].Id).To(Or(Equal(headerOneID), Equal(headerTwoID)))
-			})
 		})
 	})
 
@@ -285,33 +246,50 @@ var _ = Describe("Repository", func() {
 		})
 	})
 
-	Describe("CreateNotCheckedSQL", func() {
+	Describe("CreateHeaderCheckedPredicateSQL", func() {
+		Describe("for headers that haven't been checked for logs", func() {
 			It("generates a correct SQL string for one column", func() {
 				columns := []string{"columnA"}
-			expected := "NOT (columnA!=0)"
+				expected := " (columnA=0)"
-			actual := shared.CreateNotCheckedSQL(columns, constants.HeaderMissing)
+				actual := shared.CreateHeaderCheckedPredicateSQL(columns, constants.HeaderMissing)
 				Expect(actual).To(Equal(expected))
 			})
 
 			It("generates a correct SQL string for several columns", func() {
 				columns := []string{"columnA", "columnB"}
-			expected := "NOT (columnA!=0 AND columnB!=0)"
+				expected := " (columnA=0 OR columnB=0)"
-			actual := shared.CreateNotCheckedSQL(columns, constants.HeaderMissing)
+				actual := shared.CreateHeaderCheckedPredicateSQL(columns, constants.HeaderMissing)
 				Expect(actual).To(Equal(expected))
 			})
 
 			It("defaults to FALSE when there are no columns", func() {
 				expected := "FALSE"
-			actual := shared.CreateNotCheckedSQL([]string{}, constants.HeaderMissing)
+				actual := shared.CreateHeaderCheckedPredicateSQL([]string{}, constants.HeaderMissing)
+				Expect(actual).To(Equal(expected))
+			})
+		})
+
+		Describe("for headers that are being rechecked for logs", func() {
+			It("generates a correct SQL string for rechecking headers for one column", func() {
+				columns := []string{"columnA"}
+				expected := fmt.Sprintf(" (columnA<%s)", constants.RecheckHeaderCap)
+				actual := shared.CreateHeaderCheckedPredicateSQL(columns, constants.HeaderRecheck)
 				Expect(actual).To(Equal(expected))
 			})
 
-		It("generates a correct SQL string for rechecking headers", func() {
+			It("generates a correct SQL string for rechecking headers for several columns", func() {
 				columns := []string{"columnA", "columnB"}
-			expected := fmt.Sprintf("NOT (columnA>=%s AND columnB>=%s)", constants.RecheckHeaderCap, constants.RecheckHeaderCap)
+				expected := fmt.Sprintf(" (columnA<%s OR columnB<%s)", constants.RecheckHeaderCap, constants.RecheckHeaderCap)
-			actual := shared.CreateNotCheckedSQL(columns, constants.HeaderRecheck)
+				actual := shared.CreateHeaderCheckedPredicateSQL(columns, constants.HeaderRecheck)
 				Expect(actual).To(Equal(expected))
 			})
+
+			It("defaults to FALSE when there are no columns", func() {
+				expected := "FALSE"
+				actual := shared.CreateHeaderCheckedPredicateSQL([]string{}, constants.HeaderRecheck)
+				Expect(actual).To(Equal(expected))
+			})
+		})
 	})
 })
 

libraries/shared/transformer/event_transformer.go

@@ -20,13 +20,12 @@ import (
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/core/types"
 
-	"github.com/vulcanize/vulcanizedb/libraries/shared/constants"
 	"github.com/vulcanize/vulcanizedb/pkg/core"
 	"github.com/vulcanize/vulcanizedb/pkg/datastore/postgres"
 )
 
 type EventTransformer interface {
-	Execute(logs []types.Log, header core.Header, recheckHeaders constants.TransformerExecution) error
+	Execute(logs []types.Log, header core.Header) error
 	GetConfig() EventTransformerConfig
 }
 

libraries/shared/watcher/event_watcher.go

@@ -96,7 +96,7 @@ func (watcher *EventWatcher) Execute(recheckHeaders constants.TransformerExecuti
 	if err != nil {
 		return err
 	}
-	notCheckedSQL := repository.CreateNotCheckedSQL(checkedColumnNames, recheckHeaders)
+	notCheckedSQL := repository.CreateHeaderCheckedPredicateSQL(checkedColumnNames, recheckHeaders)
 
 	missingHeaders, err := repository.MissingHeaders(*watcher.StartingBlock, -1, watcher.DB, notCheckedSQL)
 	if err != nil {
@@ -134,7 +134,7 @@ func (watcher *EventWatcher) transformLogs(logs []types.Log, header core.Header)
 	for _, t := range watcher.Transformers {
 		transformerName := t.GetConfig().TransformerName
 		logChunk := chunkedLogs[transformerName]
-		err := t.Execute(logChunk, header, constants.HeaderMissing)
+		err := t.Execute(logChunk, header)
 		if err != nil {
 			logrus.Errorf("%v transformer failed to execute in watcher: %v", transformerName, err)
 			return err