diff --git a/db/migrations/1533844125_create_frob_table.up.sql b/db/migrations/1533844125_create_frob_table.up.sql
index 78a0fdb0..13be1690 100644
--- a/db/migrations/1533844125_create_frob_table.up.sql
+++ b/db/migrations/1533844125_create_frob_table.up.sql
@@ -1,14 +1,15 @@
 CREATE TABLE maker.frob (
   id        SERIAL PRIMARY KEY,
   header_id INTEGER NOT NULL REFERENCES headers (id) ON DELETE CASCADE,
-  ilk       bytea,
-  urn       bytea,
+  ilk       TEXT,
+  urn       TEXT,
   dink      NUMERIC,
   dart      NUMERIC,
   ink       NUMERIC,
   art       NUMERIC,
   iart      NUMERIC,
+  log_idx   INTEGER NOT NUll,
   tx_idx    INTEGER NOT NUll,
   raw_log   JSONB,
-  UNIQUE (header_id, tx_idx)
+  UNIQUE (header_id, tx_idx, log_idx)
 );
\ No newline at end of file
diff --git a/db/migrations/1538670026_update_frob_bite_urn_ilk_type.down.sql b/db/migrations/1538670026_update_frob_bite_urn_ilk_type.down.sql
deleted file mode 100644
index e134b3f3..00000000
--- a/db/migrations/1538670026_update_frob_bite_urn_ilk_type.down.sql
+++ /dev/null
@@ -1,7 +0,0 @@
-ALTER TABLE maker.bite
-  ALTER COLUMN ilk SET DATA TYPE bytea,
-  ALTER COLUMN urn SET DATA TYPE bytea;
-
-ALTER TABLE maker.frob
-  ALTER COLUMN ilk SET DATA TYPE bytea,
-  ALTER COLUMN urn SET DATA TYPE bytea;
diff --git a/db/migrations/1538670026_update_frob_bite_urn_ilk_type.up.sql b/db/migrations/1538670026_update_frob_bite_urn_ilk_type.up.sql
deleted file mode 100644
index 730241d9..00000000
--- a/db/migrations/1538670026_update_frob_bite_urn_ilk_type.up.sql
+++ /dev/null
@@ -1,7 +0,0 @@
-ALTER TABLE maker.bite
-  ALTER COLUMN ilk SET DATA TYPE text,
-  ALTER COLUMN urn SET DATA TYPE text;
-
-ALTER TABLE maker.frob
-  ALTER COLUMN ilk SET DATA TYPE text,
-  ALTER COLUMN urn SET DATA TYPE text;
diff --git a/db/schema.sql b/db/schema.sql
index df584fc5..90f1de40 100644
--- a/db/schema.sql
+++ b/db/schema.sql
@@ -507,6 +507,7 @@ CREATE TABLE maker.frob (
     ink numeric,
     art numeric,
     iart numeric,
+    log_idx integer NOT NULL,
     tx_idx integer NOT NULL,
     raw_log jsonb
 );
@@ -1912,11 +1913,11 @@ ALTER TABLE ONLY maker.flop_kick
 
 
 --
--- Name: frob frob_header_id_tx_idx_key; Type: CONSTRAINT; Schema: maker; Owner: -
+-- Name: frob frob_header_id_tx_idx_log_idx_key; Type: CONSTRAINT; Schema: maker; Owner: -
 --
 
 ALTER TABLE ONLY maker.frob
-    ADD CONSTRAINT frob_header_id_tx_idx_key UNIQUE (header_id, tx_idx);
+    ADD CONSTRAINT frob_header_id_tx_idx_log_idx_key UNIQUE (header_id, tx_idx, log_idx);
 
 
 --
diff --git a/pkg/transformers/frob/converter.go b/pkg/transformers/frob/converter.go
index 9f22bd25..34bb1ea3 100644
--- a/pkg/transformers/frob/converter.go
+++ b/pkg/transformers/frob/converter.go
@@ -42,6 +42,10 @@ func (FrobConverter) ToEntities(contractAbi string, ethLogs []types.Log) ([]Frob
 		}
 		contract := bind.NewBoundContract(address, abi, nil, nil, nil)
 		err = contract.UnpackLog(&entity, "Frob", ethLog)
+		if err != nil {
+			return entities, err
+		}
+		entity.LogIndex = ethLog.Index
 		entity.TransactionIndex = ethLog.TxIndex
 		entity.Raw = ethLog
 		entities = append(entities, entity)
@@ -65,6 +69,7 @@ func (FrobConverter) ToModels(entities []FrobEntity) ([]FrobModel, error) {
 			Dink:             entity.Dink.String(),
 			Dart:             entity.Dart.String(),
 			IArt:             entity.IArt.String(),
+			LogIndex:         entity.LogIndex,
 			TransactionIndex: entity.TransactionIndex,
 			Raw:              rawLog,
 		}
diff --git a/pkg/transformers/frob/entity.go b/pkg/transformers/frob/entity.go
index c150219e..d33eb49d 100644
--- a/pkg/transformers/frob/entity.go
+++ b/pkg/transformers/frob/entity.go
@@ -28,6 +28,7 @@ type FrobEntity struct {
 	Dink             *big.Int
 	Dart             *big.Int
 	IArt             *big.Int
+	LogIndex         uint
 	TransactionIndex uint
 	Raw              types.Log
 }
diff --git a/pkg/transformers/frob/model.go b/pkg/transformers/frob/model.go
index bbb31f37..eef52833 100644
--- a/pkg/transformers/frob/model.go
+++ b/pkg/transformers/frob/model.go
@@ -22,6 +22,7 @@ type FrobModel struct {
 	Dink             string
 	Dart             string
 	IArt             string
+	LogIndex         uint   `db:"log_idx"`
 	TransactionIndex uint   `db:"tx_idx"`
 	Raw              []byte `db:"raw_log"`
 }
diff --git a/pkg/transformers/frob/repository.go b/pkg/transformers/frob/repository.go
index e4e1dfb7..ab7de620 100644
--- a/pkg/transformers/frob/repository.go
+++ b/pkg/transformers/frob/repository.go
@@ -39,9 +39,9 @@ func (repository FrobRepository) Create(headerID int64, models []FrobModel) erro
 		return err
 	}
 	for _, model := range models {
-		_, err = tx.Exec(`INSERT INTO maker.frob (header_id, art, dart, dink, iart, ilk, ink, urn, raw_log, tx_idx)
-		VALUES($1, $2::NUMERIC, $3::NUMERIC, $4::NUMERIC, $5::NUMERIC, $6, $7::NUMERIC, $8, $9, $10)`,
-			headerID, model.Art, model.Dart, model.Dink, model.IArt, model.Ilk, model.Ink, model.Urn, model.Raw, model.TransactionIndex)
+		_, err = tx.Exec(`INSERT INTO maker.frob (header_id, art, dart, dink, iart, ilk, ink, urn, raw_log, log_idx, tx_idx)
+		VALUES($1, $2::NUMERIC, $3::NUMERIC, $4::NUMERIC, $5::NUMERIC, $6, $7::NUMERIC, $8, $9, $10, $11)`,
+			headerID, model.Art, model.Dart, model.Dink, model.IArt, model.Ilk, model.Ink, model.Urn, model.Raw, model.LogIndex, model.TransactionIndex)
 		if err != nil {
 			tx.Rollback()
 			return err
diff --git a/pkg/transformers/frob/repository_test.go b/pkg/transformers/frob/repository_test.go
index 1bc96071..dc14e824 100644
--- a/pkg/transformers/frob/repository_test.go
+++ b/pkg/transformers/frob/repository_test.go
@@ -51,14 +51,14 @@ var _ = Describe("Frob repository", func() {
 		BeforeEach(func() {
 			headerID, err = headerRepository.CreateOrUpdateHeader(fakes.FakeHeader)
 			Expect(err).NotTo(HaveOccurred())
-
-			err = frobRepository.Create(headerID, []frob.FrobModel{test_data.FrobModel})
-			Expect(err).NotTo(HaveOccurred())
 		})
 
 		It("adds a frob", func() {
+			err = frobRepository.Create(headerID, []frob.FrobModel{test_data.FrobModel})
+
+			Expect(err).NotTo(HaveOccurred())
 			var dbFrob frob.FrobModel
-			err = db.Get(&dbFrob, `SELECT art, dart, dink, iart, ilk, ink, urn, tx_idx, raw_log FROM maker.frob WHERE header_id = $1`, headerID)
+			err = db.Get(&dbFrob, `SELECT art, dart, dink, iart, ilk, ink, urn, log_idx, tx_idx, raw_log FROM maker.frob WHERE header_id = $1`, headerID)
 			Expect(err).NotTo(HaveOccurred())
 			Expect(dbFrob.Ilk).To(Equal(test_data.FrobModel.Ilk))
 			Expect(dbFrob.Urn).To(Equal(test_data.FrobModel.Urn))
@@ -67,11 +67,28 @@ var _ = Describe("Frob repository", func() {
 			Expect(dbFrob.Dink).To(Equal(test_data.FrobModel.Dink))
 			Expect(dbFrob.Dart).To(Equal(test_data.FrobModel.Dart))
 			Expect(dbFrob.IArt).To(Equal(test_data.FrobModel.IArt))
+			Expect(dbFrob.LogIndex).To(Equal(test_data.FrobModel.LogIndex))
 			Expect(dbFrob.TransactionIndex).To(Equal(test_data.FrobModel.TransactionIndex))
 			Expect(dbFrob.Raw).To(MatchJSON(test_data.FrobModel.Raw))
 		})
 
 		It("marks header as checked for logs", func() {
+			err = frobRepository.Create(headerID, []frob.FrobModel{test_data.FrobModel})
+
+			Expect(err).NotTo(HaveOccurred())
+			var headerChecked bool
+			err = db.Get(&headerChecked, `SELECT frob_checked FROM public.checked_headers WHERE header_id = $1`, headerID)
+			Expect(err).NotTo(HaveOccurred())
+			Expect(headerChecked).To(BeTrue())
+		})
+
+		It("updates the header to checked if checked headers row already exists", func() {
+			_, err = db.Exec(`INSERT INTO public.checked_headers (header_id) VALUES ($1)`, headerID)
+			Expect(err).NotTo(HaveOccurred())
+
+			err = frobRepository.Create(headerID, []frob.FrobModel{test_data.FrobModel})
+
+			Expect(err).NotTo(HaveOccurred())
 			var headerChecked bool
 			err = db.Get(&headerChecked, `SELECT frob_checked FROM public.checked_headers WHERE header_id = $1`, headerID)
 			Expect(err).NotTo(HaveOccurred())
@@ -79,6 +96,9 @@ var _ = Describe("Frob repository", func() {
 		})
 
 		It("does not duplicate frob events", func() {
+			err = frobRepository.Create(headerID, []frob.FrobModel{test_data.FrobModel})
+			Expect(err).NotTo(HaveOccurred())
+
 			err = frobRepository.Create(headerID, []frob.FrobModel{test_data.FrobModel})
 
 			Expect(err).To(HaveOccurred())
@@ -86,11 +106,14 @@ var _ = Describe("Frob repository", func() {
 		})
 
 		It("removes frob if corresponding header is deleted", func() {
+			err = frobRepository.Create(headerID, []frob.FrobModel{test_data.FrobModel})
+			Expect(err).NotTo(HaveOccurred())
+
 			_, err = db.Exec(`DELETE FROM headers WHERE id = $1`, headerID)
 
 			Expect(err).NotTo(HaveOccurred())
 			var dbFrob frob.FrobModel
-			err = db.Get(&dbFrob, `SELECT art, iart, ilk, ink, urn, tx_idx, raw_log FROM maker.frob WHERE header_id = $1`, headerID)
+			err = db.Get(&dbFrob, `SELECT art, iart, ilk, ink, urn, log_idx, tx_idx, raw_log FROM maker.frob WHERE header_id = $1`, headerID)
 			Expect(err).To(HaveOccurred())
 			Expect(err).To(MatchError(sql.ErrNoRows))
 		})
diff --git a/pkg/transformers/test_data/frob.go b/pkg/transformers/test_data/frob.go
index 7ed5cd1c..69d828d5 100644
--- a/pkg/transformers/test_data/frob.go
+++ b/pkg/transformers/test_data/frob.go
@@ -57,7 +57,7 @@ var EthFrobLog = types.Log{
 	TxHash:      common.HexToHash(TemporaryFrobTransaction),
 	TxIndex:     123,
 	BlockHash:   TemporaryFrobBlockHash,
-	Index:       0,
+	Index:       7,
 	Removed:     false,
 }
 
@@ -69,6 +69,7 @@ var FrobEntity = frob.FrobEntity{
 	Dink:             dink,
 	Dart:             dart,
 	IArt:             iArt,
+	LogIndex:         EthFrobLog.Index,
 	TransactionIndex: EthFrobLog.TxIndex,
 	Raw:              EthFrobLog,
 }
@@ -82,6 +83,7 @@ var FrobModel = frob.FrobModel{
 	Dink:             dink.String(),
 	Dart:             dart.String(),
 	IArt:             iArt.String(),
+	LogIndex:         EthFrobLog.Index,
 	TransactionIndex: EthFrobLog.TxIndex,
 	Raw:              rawFrobLog,
 }