Sync unchecked headers for price feeds

- Indicate that a header has been checked for logs if no logs returned
- Indicate that a header has been checked for logs when persisting a log
- Fetch headers that need to be checked based on absence of the above

pkg/transformers/test_data/mocks/price_feeds/repository.go

@@ -22,19 +22,25 @@ import (
 )
 
 type MockPriceFeedRepository struct {
-	createErr                 error
-	missingHeaders            []core.Header
-	missingHeadersErr         error
-	passedEndingBlockNumber   int64
-	passedHeaderID            int64
-	passedModel               price_feeds.PriceFeedModel
-	passedStartingBlockNumber int64
+	createErr                       error
+	createPassedHeaderID            int64
+	markHeaderCheckedErr            error
+	markHeaderCheckedPassedHeaderID int64
+	missingHeaders                  []core.Header
+	missingHeadersErr               error
+	passedEndingBlockNumber         int64
+	passedModel                     price_feeds.PriceFeedModel
+	passedStartingBlockNumber       int64
 }
 
 func (repository *MockPriceFeedRepository) SetCreateErr(err error) {
 	repository.createErr = err
 }
 
+func (repository *MockPriceFeedRepository) SetMarkHeaderCheckedErr(err error) {
+	repository.markHeaderCheckedErr = err
+}
+
 func (repository *MockPriceFeedRepository) SetMissingHeadersErr(err error) {
 	repository.missingHeadersErr = err
 }
@@ -44,11 +50,16 @@ func (repository *MockPriceFeedRepository) SetMissingHeaders(headers []core.Head
 }
 
 func (repository *MockPriceFeedRepository) Create(headerID int64, model price_feeds.PriceFeedModel) error {
-	repository.passedHeaderID = headerID
+	repository.createPassedHeaderID = headerID
 	repository.passedModel = model
 	return repository.createErr
 }
 
+func (repository *MockPriceFeedRepository) MarkHeaderChecked(headerID int64) error {
+	repository.markHeaderCheckedPassedHeaderID = headerID
+	return repository.markHeaderCheckedErr
+}
+
 func (repository *MockPriceFeedRepository) MissingHeaders(startingBlockNumber, endingBlockNumber int64) ([]core.Header, error) {
 	repository.passedStartingBlockNumber = startingBlockNumber
 	repository.passedEndingBlockNumber = endingBlockNumber
@@ -56,10 +67,14 @@ func (repository *MockPriceFeedRepository) MissingHeaders(startingBlockNumber, e
 }
 
 func (repository *MockPriceFeedRepository) AssertCreateCalledWith(headerID int64, model price_feeds.PriceFeedModel) {
-	Expect(repository.passedHeaderID).To(Equal(headerID))
+	Expect(repository.createPassedHeaderID).To(Equal(headerID))
 	Expect(repository.passedModel).To(Equal(model))
 }
 
+func (repository *MockPriceFeedRepository) AssertMarkHeaderCheckedCalledWith(headerID int64) {
+	Expect(repository.markHeaderCheckedPassedHeaderID).To(Equal(headerID))
+}
+
 func (repository *MockPriceFeedRepository) AssertMissingHeadersCalledwith(startingBlockNumber, endingBlockNumber int64) {
 	Expect(repository.passedStartingBlockNumber).To(Equal(startingBlockNumber))
 	Expect(repository.passedEndingBlockNumber).To(Equal(endingBlockNumber))