Add drip file transformers

- for all three file functions on the drip contract

db/migrations/1536603967_create_drip_file_tables.down.sql

@@ -0,0 +1,3 @@
+DROP TABLE maker.drip_file_ilk;
+DROP TABLE maker.drip_file_repo;
+DROP TABLE maker.drip_file_vow;

db/migrations/1536603967_create_drip_file_tables.up.sql

@@ -0,0 +1,30 @@
+CREATE TABLE maker.drip_file_ilk (
+  id            SERIAL PRIMARY KEY,
+  header_id     INTEGER NOT NULL REFERENCES headers (id) ON DELETE CASCADE,
+  ilk           TEXT,
+  vow           TEXT,
+  tax           NUMERIC,
+	tx_idx        INTEGER NOT NUll,
+  raw_log       JSONB,
+  UNIQUE (header_id, tx_idx)
+);
+
+CREATE TABLE maker.drip_file_repo (
+  id SERIAL PRIMARY KEY,
+  header_id INTEGER NOT NULL REFERENCES headers (id) ON DELETE CASCADE,
+  what      TEXT,
+  data      NUMERIC,
+  tx_idx    INTEGER NOT NULL,
+  raw_log   JSONB,
+  UNIQUE (header_id, tx_idx)
+);
+
+CREATE TABLE maker.drip_file_vow (
+  id SERIAL PRIMARY KEY,
+  header_id INTEGER NOT NULL REFERENCES headers (id) ON DELETE CASCADE,
+  what      TEXT,
+  data      TEXT,
+  tx_idx    INTEGER NOT NULL,
+  raw_log   JSONB,
+  UNIQUE (header_id, tx_idx)
+);

db/schema.sql

@@ -116,6 +116,109 @@ CREATE SEQUENCE maker.dent_db_id_seq
 ALTER SEQUENCE maker.dent_db_id_seq OWNED BY maker.dent.db_id;
 
 
+--
+-- Name: drip_file_ilk; Type: TABLE; Schema: maker; Owner: -
+--
+
+CREATE TABLE maker.drip_file_ilk (
+    id integer NOT NULL,
+    header_id integer NOT NULL,
+    ilk text,
+    vow text,
+    tax numeric,
+    tx_idx integer NOT NULL,
+    raw_log jsonb
+);
+
+
+--
+-- Name: drip_file_ilk_id_seq; Type: SEQUENCE; Schema: maker; Owner: -
+--
+
+CREATE SEQUENCE maker.drip_file_ilk_id_seq
+    AS integer
+    START WITH 1
+    INCREMENT BY 1
+    NO MINVALUE
+    NO MAXVALUE
+    CACHE 1;
+
+
+--
+-- Name: drip_file_ilk_id_seq; Type: SEQUENCE OWNED BY; Schema: maker; Owner: -
+--
+
+ALTER SEQUENCE maker.drip_file_ilk_id_seq OWNED BY maker.drip_file_ilk.id;
+
+
+--
+-- Name: drip_file_repo; Type: TABLE; Schema: maker; Owner: -
+--
+
+CREATE TABLE maker.drip_file_repo (
+    id integer NOT NULL,
+    header_id integer NOT NULL,
+    what text,
+    data numeric,
+    tx_idx integer NOT NULL,
+    raw_log jsonb
+);
+
+
+--
+-- Name: drip_file_repo_id_seq; Type: SEQUENCE; Schema: maker; Owner: -
+--
+
+CREATE SEQUENCE maker.drip_file_repo_id_seq
+    AS integer
+    START WITH 1
+    INCREMENT BY 1
+    NO MINVALUE
+    NO MAXVALUE
+    CACHE 1;
+
+
+--
+-- Name: drip_file_repo_id_seq; Type: SEQUENCE OWNED BY; Schema: maker; Owner: -
+--
+
+ALTER SEQUENCE maker.drip_file_repo_id_seq OWNED BY maker.drip_file_repo.id;
+
+
+--
+-- Name: drip_file_vow; Type: TABLE; Schema: maker; Owner: -
+--
+
+CREATE TABLE maker.drip_file_vow (
+    id integer NOT NULL,
+    header_id integer NOT NULL,
+    what text,
+    data text,
+    tx_idx integer NOT NULL,
+    raw_log jsonb
+);
+
+
+--
+-- Name: drip_file_vow_id_seq; Type: SEQUENCE; Schema: maker; Owner: -
+--
+
+CREATE SEQUENCE maker.drip_file_vow_id_seq
+    AS integer
+    START WITH 1
+    INCREMENT BY 1
+    NO MINVALUE
+    NO MAXVALUE
+    CACHE 1;
+
+
+--
+-- Name: drip_file_vow_id_seq; Type: SEQUENCE OWNED BY; Schema: maker; Owner: -
+--
+
+ALTER SEQUENCE maker.drip_file_vow_id_seq OWNED BY maker.drip_file_vow.id;
+
+
 --
 -- Name: flip_kick; Type: TABLE; Schema: maker; Owner: -
 --
@@ -786,6 +889,27 @@ ALTER TABLE ONLY maker.bite ALTER COLUMN id SET DEFAULT nextval('maker.bite_id_s
 ALTER TABLE ONLY maker.dent ALTER COLUMN db_id SET DEFAULT nextval('maker.dent_db_id_seq'::regclass);
 
 
+--
+-- Name: drip_file_ilk id; Type: DEFAULT; Schema: maker; Owner: -
+--
+
+ALTER TABLE ONLY maker.drip_file_ilk ALTER COLUMN id SET DEFAULT nextval('maker.drip_file_ilk_id_seq'::regclass);
+
+
+--
+-- Name: drip_file_repo id; Type: DEFAULT; Schema: maker; Owner: -
+--
+
+ALTER TABLE ONLY maker.drip_file_repo ALTER COLUMN id SET DEFAULT nextval('maker.drip_file_repo_id_seq'::regclass);
+
+
+--
+-- Name: drip_file_vow id; Type: DEFAULT; Schema: maker; Owner: -
+--
+
+ALTER TABLE ONLY maker.drip_file_vow ALTER COLUMN id SET DEFAULT nextval('maker.drip_file_vow_id_seq'::regclass);
+
+
 --
 -- Name: flip_kick db_id; Type: DEFAULT; Schema: maker; Owner: -
 --
@@ -937,6 +1061,54 @@ ALTER TABLE ONLY maker.dent
     ADD CONSTRAINT dent_pkey PRIMARY KEY (db_id);
 
 
+--
+-- Name: drip_file_ilk drip_file_ilk_header_id_tx_idx_key; Type: CONSTRAINT; Schema: maker; Owner: -
+--
+
+ALTER TABLE ONLY maker.drip_file_ilk
+    ADD CONSTRAINT drip_file_ilk_header_id_tx_idx_key UNIQUE (header_id, tx_idx);
+
+
+--
+-- Name: drip_file_ilk drip_file_ilk_pkey; Type: CONSTRAINT; Schema: maker; Owner: -
+--
+
+ALTER TABLE ONLY maker.drip_file_ilk
+    ADD CONSTRAINT drip_file_ilk_pkey PRIMARY KEY (id);
+
+
+--
+-- Name: drip_file_repo drip_file_repo_header_id_tx_idx_key; Type: CONSTRAINT; Schema: maker; Owner: -
+--
+
+ALTER TABLE ONLY maker.drip_file_repo
+    ADD CONSTRAINT drip_file_repo_header_id_tx_idx_key UNIQUE (header_id, tx_idx);
+
+
+--
+-- Name: drip_file_repo drip_file_repo_pkey; Type: CONSTRAINT; Schema: maker; Owner: -
+--
+
+ALTER TABLE ONLY maker.drip_file_repo
+    ADD CONSTRAINT drip_file_repo_pkey PRIMARY KEY (id);
+
+
+--
+-- Name: drip_file_vow drip_file_vow_header_id_tx_idx_key; Type: CONSTRAINT; Schema: maker; Owner: -
+--
+
+ALTER TABLE ONLY maker.drip_file_vow
+    ADD CONSTRAINT drip_file_vow_header_id_tx_idx_key UNIQUE (header_id, tx_idx);
+
+
+--
+-- Name: drip_file_vow drip_file_vow_pkey; Type: CONSTRAINT; Schema: maker; Owner: -
+--
+
+ALTER TABLE ONLY maker.drip_file_vow
+    ADD CONSTRAINT drip_file_vow_pkey PRIMARY KEY (id);
+
+
 --
 -- Name: flip_kick flip_kick_id_key; Type: CONSTRAINT; Schema: maker; Owner: -
 --
@@ -1212,6 +1384,30 @@ ALTER TABLE ONLY maker.dent
     ADD CONSTRAINT dent_header_id_fkey FOREIGN KEY (header_id) REFERENCES public.headers(id) ON DELETE CASCADE;
 
 
+--
+-- Name: drip_file_ilk drip_file_ilk_header_id_fkey; Type: FK CONSTRAINT; Schema: maker; Owner: -
+--
+
+ALTER TABLE ONLY maker.drip_file_ilk
+    ADD CONSTRAINT drip_file_ilk_header_id_fkey FOREIGN KEY (header_id) REFERENCES public.headers(id) ON DELETE CASCADE;
+
+
+--
+-- Name: drip_file_repo drip_file_repo_header_id_fkey; Type: FK CONSTRAINT; Schema: maker; Owner: -
+--
+
+ALTER TABLE ONLY maker.drip_file_repo
+    ADD CONSTRAINT drip_file_repo_header_id_fkey FOREIGN KEY (header_id) REFERENCES public.headers(id) ON DELETE CASCADE;
+
+
+--
+-- Name: drip_file_vow drip_file_vow_header_id_fkey; Type: FK CONSTRAINT; Schema: maker; Owner: -
+--
+
+ALTER TABLE ONLY maker.drip_file_vow
+    ADD CONSTRAINT drip_file_vow_header_id_fkey FOREIGN KEY (header_id) REFERENCES public.headers(id) ON DELETE CASCADE;
+
+
 --
 -- Name: flip_kick flip_kick_header_id_fkey; Type: FK CONSTRAINT; Schema: maker; Owner: -
 --

pkg/transformers/drip_file/config.go

@@ -0,0 +1,25 @@
+// Copyright 2018 Vulcanize
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package drip_file
+
+import "github.com/vulcanize/vulcanizedb/pkg/transformers/shared"
+
+var DripFileConfig = shared.TransformerConfig{
+	ContractAddress:     shared.DripContractAddress,
+	ContractAbi:         shared.DripABI,
+	Topics:              []string{shared.DripFileIlkSignature, shared.DripFileRepoSignature},
+	StartingBlockNumber: 0,
+	EndingBlockNumber:   100,
+}

pkg/transformers/drip_file/ilk/converter.go

@@ -0,0 +1,60 @@
+// Copyright 2018 Vulcanize
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package ilk
+
+import (
+	"bytes"
+	"encoding/json"
+	"math/big"
+
+	"errors"
+	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/shared"
+)
+
+type Converter interface {
+	ToModel(ethLog types.Log) (DripFileIlkModel, error)
+}
+
+type DripFileIlkConverter struct{}
+
+func (DripFileIlkConverter) ToModel(ethLog types.Log) (DripFileIlkModel, error) {
+	err := verifyLog(ethLog)
+	if err != nil {
+		return DripFileIlkModel{}, err
+	}
+	ilk := string(bytes.Trim(ethLog.Topics[2].Bytes(), "\x00"))
+	vow := string(bytes.Trim(ethLog.Topics[3].Bytes(), "\x00"))
+	taxBytes := ethLog.Data[len(ethLog.Data)-shared.DataItemLength:]
+	tax := big.NewInt(0).SetBytes(taxBytes).String()
+	raw, err := json.Marshal(ethLog)
+	return DripFileIlkModel{
+		Ilk:              ilk,
+		Vow:              vow,
+		Tax:              tax,
+		TransactionIndex: ethLog.TxIndex,
+		Raw:              raw,
+	}, err
+}
+
+func verifyLog(log types.Log) error {
+	if len(log.Topics) < 4 {
+		return errors.New("log missing topics")
+	}
+	if len(log.Data) < shared.DataItemLength {
+		return errors.New("log missing data")
+	}
+	return nil
+}

pkg/transformers/drip_file/ilk/converter_test.go

@@ -0,0 +1,60 @@
+// Copyright 2018 Vulcanize
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package ilk_test
+
+import (
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/drip_file/ilk"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/test_data"
+)
+
+var _ = Describe("Drip file ilk converter", func() {
+	It("returns err if log missing topics", func() {
+		converter := ilk.DripFileIlkConverter{}
+		badLog := types.Log{
+			Topics: []common.Hash{{}},
+			Data:   []byte{1, 1, 1, 1, 1},
+		}
+
+		_, err := converter.ToModel(badLog)
+
+		Expect(err).To(HaveOccurred())
+	})
+
+	It("returns err if log missing data", func() {
+		converter := ilk.DripFileIlkConverter{}
+		badLog := types.Log{
+			Topics: []common.Hash{{}, {}, {}, {}},
+		}
+
+		_, err := converter.ToModel(badLog)
+
+		Expect(err).To(HaveOccurred())
+
+	})
+
+	It("converts a log to a model", func() {
+		converter := ilk.DripFileIlkConverter{}
+
+		model, err := converter.ToModel(test_data.EthDripFileIlkLog)
+
+		Expect(err).NotTo(HaveOccurred())
+		Expect(model).To(Equal(test_data.DripFileIlkModel))
+	})
+})

pkg/transformers/drip_file/ilk/ilk_suite_test.go

@@ -0,0 +1,27 @@
+// Copyright 2018 Vulcanize
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package ilk_test
+
+import (
+	"testing"
+
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+)
+
+func TestIlk(t *testing.T) {
+	RegisterFailHandler(Fail)
+	RunSpecs(t, "Ilk Suite")
+}

pkg/transformers/drip_file/ilk/model.go

@@ -0,0 +1,23 @@
+// Copyright 2018 Vulcanize
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package ilk
+
+type DripFileIlkModel struct {
+	Ilk              string
+	Vow              string
+	Tax              string
+	TransactionIndex uint   `db:"tx_idx"`
+	Raw              []byte `db:"raw_log"`
+}

pkg/transformers/drip_file/ilk/repository.go

@@ -0,0 +1,59 @@
+// Copyright 2018 Vulcanize
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package ilk
+
+import (
+	"github.com/vulcanize/vulcanizedb/pkg/core"
+	"github.com/vulcanize/vulcanizedb/pkg/datastore/postgres"
+)
+
+type Repository interface {
+	Create(headerID int64, model DripFileIlkModel) error
+	MissingHeaders(startingBlockNumber, endingBlockNumber int64) ([]core.Header, error)
+}
+
+type DripFileIlkRepository struct {
+	db *postgres.DB
+}
+
+func NewDripFileIlkRepository(db *postgres.DB) DripFileIlkRepository {
+	return DripFileIlkRepository{db: db}
+}
+
+func (repository DripFileIlkRepository) Create(headerID int64, model DripFileIlkModel) error {
+	_, err := repository.db.Exec(
+		`INSERT into maker.drip_file_ilk (header_id, ilk, vow, tax, tx_idx, raw_log)
+        VALUES($1, $2, $3, $4::NUMERIC, $5, $6)`,
+		headerID, model.Ilk, model.Vow, model.Tax, model.TransactionIndex, model.Raw,
+	)
+	return err
+}
+
+func (repository DripFileIlkRepository) MissingHeaders(startingBlockNumber, endingBlockNumber int64) ([]core.Header, error) {
+	var result []core.Header
+	err := repository.db.Select(
+		&result,
+		`SELECT headers.id, headers.block_number FROM headers
+               LEFT JOIN maker.drip_file_ilk on headers.id = header_id
+               WHERE header_id ISNULL
+               AND headers.block_number >= $1
+               AND headers.block_number <= $2
+               AND headers.eth_node_fingerprint = $3`,
+		startingBlockNumber,
+		endingBlockNumber,
+		repository.db.Node.ID,
+	)
+	return result, err
+}

pkg/transformers/drip_file/ilk/repository_test.go

@@ -0,0 +1,145 @@
+// Copyright 2018 Vulcanize
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package ilk_test
+
+import (
+	"database/sql"
+
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+
+	"github.com/vulcanize/vulcanizedb/pkg/core"
+	"github.com/vulcanize/vulcanizedb/pkg/datastore/postgres/repositories"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/drip_file/ilk"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/test_data"
+	"github.com/vulcanize/vulcanizedb/test_config"
+)
+
+var _ = Describe("Drip file ilk repository", func() {
+	Describe("Create", func() {
+		It("adds a drip file ilk event", func() {
+			db := test_config.NewTestDB(core.Node{})
+			test_config.CleanTestDB(db)
+			headerRepository := repositories.NewHeaderRepository(db)
+			headerID, err := headerRepository.CreateOrUpdateHeader(core.Header{})
+			Expect(err).NotTo(HaveOccurred())
+			dripFileIlkRepository := ilk.NewDripFileIlkRepository(db)
+
+			err = dripFileIlkRepository.Create(headerID, test_data.DripFileIlkModel)
+
+			Expect(err).NotTo(HaveOccurred())
+			var dbDripFileIlk ilk.DripFileIlkModel
+			err = db.Get(&dbDripFileIlk, `SELECT ilk, vow, tax, tx_idx, raw_log FROM maker.drip_file_ilk WHERE header_id = $1`, headerID)
+			Expect(err).NotTo(HaveOccurred())
+			Expect(dbDripFileIlk.Ilk).To(Equal(test_data.DripFileIlkModel.Ilk))
+			Expect(dbDripFileIlk.Vow).To(Equal(test_data.DripFileIlkModel.Vow))
+			Expect(dbDripFileIlk.Tax).To(Equal(test_data.DripFileIlkModel.Tax))
+			Expect(dbDripFileIlk.TransactionIndex).To(Equal(test_data.DripFileIlkModel.TransactionIndex))
+			Expect(dbDripFileIlk.Raw).To(MatchJSON(test_data.DripFileIlkModel.Raw))
+		})
+
+		It("does not duplicate drip file events", func() {
+			db := test_config.NewTestDB(core.Node{})
+			test_config.CleanTestDB(db)
+			headerRepository := repositories.NewHeaderRepository(db)
+			headerID, err := headerRepository.CreateOrUpdateHeader(core.Header{})
+			Expect(err).NotTo(HaveOccurred())
+			dripFileIlkRepository := ilk.NewDripFileIlkRepository(db)
+			err = dripFileIlkRepository.Create(headerID, test_data.DripFileIlkModel)
+			Expect(err).NotTo(HaveOccurred())
+
+			err = dripFileIlkRepository.Create(headerID, test_data.DripFileIlkModel)
+
+			Expect(err).To(HaveOccurred())
+			Expect(err.Error()).To(ContainSubstring("pq: duplicate key value violates unique constraint"))
+		})
+
+		It("removes drip file if corresponding header is deleted", func() {
+			db := test_config.NewTestDB(core.Node{})
+			test_config.CleanTestDB(db)
+			headerRepository := repositories.NewHeaderRepository(db)
+			headerID, err := headerRepository.CreateOrUpdateHeader(core.Header{})
+			Expect(err).NotTo(HaveOccurred())
+			dripFileIlkRepository := ilk.NewDripFileIlkRepository(db)
+			err = dripFileIlkRepository.Create(headerID, test_data.DripFileIlkModel)
+			Expect(err).NotTo(HaveOccurred())
+
+			_, err = db.Exec(`DELETE FROM headers WHERE id = $1`, headerID)
+
+			Expect(err).NotTo(HaveOccurred())
+			var dbDripFileIlk ilk.DripFileIlkModel
+			err = db.Get(&dbDripFileIlk, `SELECT ilk, vow, tax, tx_idx, raw_log FROM maker.drip_file_ilk WHERE header_id = $1`, headerID)
+			Expect(err).To(HaveOccurred())
+			Expect(err).To(MatchError(sql.ErrNoRows))
+		})
+	})
+
+	Describe("MissingHeaders", func() {
+		It("returns headers with no associated drip file event", func() {
+			db := test_config.NewTestDB(core.Node{})
+			test_config.CleanTestDB(db)
+			headerRepository := repositories.NewHeaderRepository(db)
+			startingBlockNumber := int64(1)
+			dripFileIlkBlockNumber := int64(2)
+			endingBlockNumber := int64(3)
+			blockNumbers := []int64{startingBlockNumber, dripFileIlkBlockNumber, endingBlockNumber, endingBlockNumber + 1}
+			var headerIDs []int64
+			for _, n := range blockNumbers {
+				headerID, err := headerRepository.CreateOrUpdateHeader(core.Header{BlockNumber: n})
+				headerIDs = append(headerIDs, headerID)
+				Expect(err).NotTo(HaveOccurred())
+			}
+			dripFileIlkRepository := ilk.NewDripFileIlkRepository(db)
+			err := dripFileIlkRepository.Create(headerIDs[1], test_data.DripFileIlkModel)
+			Expect(err).NotTo(HaveOccurred())
+
+			headers, err := dripFileIlkRepository.MissingHeaders(startingBlockNumber, endingBlockNumber)
+
+			Expect(err).NotTo(HaveOccurred())
+			Expect(len(headers)).To(Equal(2))
+			Expect(headers[0].BlockNumber).To(Or(Equal(startingBlockNumber), Equal(endingBlockNumber)))
+			Expect(headers[1].BlockNumber).To(Or(Equal(startingBlockNumber), Equal(endingBlockNumber)))
+		})
+
+		It("only returns headers associated with the current node", func() {
+			db := test_config.NewTestDB(core.Node{})
+			test_config.CleanTestDB(db)
+			blockNumbers := []int64{1, 2, 3}
+			headerRepository := repositories.NewHeaderRepository(db)
+			dbTwo := test_config.NewTestDB(core.Node{ID: "second"})
+			headerRepositoryTwo := repositories.NewHeaderRepository(dbTwo)
+			var headerIDs []int64
+			for _, n := range blockNumbers {
+				headerID, err := headerRepository.CreateOrUpdateHeader(core.Header{BlockNumber: n})
+				Expect(err).NotTo(HaveOccurred())
+				headerIDs = append(headerIDs, headerID)
+				_, err = headerRepositoryTwo.CreateOrUpdateHeader(core.Header{BlockNumber: n})
+				Expect(err).NotTo(HaveOccurred())
+			}
+			dripFileIlkRepository := ilk.NewDripFileIlkRepository(db)
+			dripFileIlkRepositoryTwo := ilk.NewDripFileIlkRepository(dbTwo)
+			err := dripFileIlkRepository.Create(headerIDs[0], test_data.DripFileIlkModel)
+			Expect(err).NotTo(HaveOccurred())
+
+			nodeOneMissingHeaders, err := dripFileIlkRepository.MissingHeaders(blockNumbers[0], blockNumbers[len(blockNumbers)-1])
+			Expect(err).NotTo(HaveOccurred())
+			Expect(len(nodeOneMissingHeaders)).To(Equal(len(blockNumbers) - 1))
+
+			nodeTwoMissingHeaders, err := dripFileIlkRepositoryTwo.MissingHeaders(blockNumbers[0], blockNumbers[len(blockNumbers)-1])
+			Expect(err).NotTo(HaveOccurred())
+			Expect(len(nodeTwoMissingHeaders)).To(Equal(len(blockNumbers)))
+		})
+	})
+})

pkg/transformers/drip_file/ilk/transformer.go

@@ -0,0 +1,71 @@
+// Copyright 2018 Vulcanize
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package ilk
+
+import (
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/vulcanize/vulcanizedb/pkg/core"
+	"github.com/vulcanize/vulcanizedb/pkg/datastore/postgres"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/drip_file"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/shared"
+)
+
+type DripFileIlkTransformer struct {
+	Config     shared.TransformerConfig
+	Converter  Converter
+	Fetcher    shared.LogFetcher
+	Repository Repository
+}
+
+type DripFileIlkTransformerInitializer struct {
+	Config shared.TransformerConfig
+}
+
+func (initializer DripFileIlkTransformerInitializer) NewDripFileIlkTransformer(db *postgres.DB, blockChain core.BlockChain) shared.Transformer {
+	converter := DripFileIlkConverter{}
+	fetcher := shared.NewFetcher(blockChain)
+	repository := NewDripFileIlkRepository(db)
+	return DripFileIlkTransformer{
+		Config:     initializer.Config,
+		Converter:  converter,
+		Fetcher:    fetcher,
+		Repository: repository,
+	}
+}
+
+func (transformer DripFileIlkTransformer) Execute() error {
+	missingHeaders, err := transformer.Repository.MissingHeaders(transformer.Config.StartingBlockNumber, transformer.Config.EndingBlockNumber)
+	if err != nil {
+		return err
+	}
+	for _, header := range missingHeaders {
+		topics := [][]common.Hash{{common.HexToHash(shared.DripFileIlkSignature)}}
+		matchingLogs, err := transformer.Fetcher.FetchLogs(drip_file.DripFileConfig.ContractAddress, topics, header.BlockNumber)
+		if err != nil {
+			return err
+		}
+		for _, log := range matchingLogs {
+			model, err := transformer.Converter.ToModel(log)
+			if err != nil {
+				return err
+			}
+			err = transformer.Repository.Create(header.Id, model)
+			if err != nil {
+				return err
+			}
+		}
+	}
+	return nil
+}

pkg/transformers/drip_file/ilk/transformer_test.go

@@ -0,0 +1,174 @@
+// Copyright 2018 Vulcanize
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package ilk_test
+
+import (
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/core/types"
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+	"github.com/vulcanize/vulcanizedb/pkg/core"
+	"github.com/vulcanize/vulcanizedb/pkg/fakes"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/drip_file"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/drip_file/ilk"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/shared"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/test_data"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/test_data/mocks"
+	ilk_mocks "github.com/vulcanize/vulcanizedb/pkg/transformers/test_data/mocks/drip_file/ilk"
+)
+
+var _ = Describe("Drip file ilk transformer", func() {
+	It("gets missing headers for block numbers specified in config", func() {
+		repository := &ilk_mocks.MockDripFileIlkRepository{}
+		transformer := ilk.DripFileIlkTransformer{
+			Config:     drip_file.DripFileConfig,
+			Fetcher:    &mocks.MockLogFetcher{},
+			Converter:  &ilk_mocks.MockDripFileIlkConverter{},
+			Repository: repository,
+		}
+
+		err := transformer.Execute()
+
+		Expect(err).NotTo(HaveOccurred())
+		Expect(repository.PassedStartingBlockNumber).To(Equal(drip_file.DripFileConfig.StartingBlockNumber))
+		Expect(repository.PassedEndingBlockNumber).To(Equal(drip_file.DripFileConfig.EndingBlockNumber))
+	})
+
+	It("returns error if repository returns error for missing headers", func() {
+		repository := &ilk_mocks.MockDripFileIlkRepository{}
+		repository.SetMissingHeadersErr(fakes.FakeError)
+		transformer := ilk.DripFileIlkTransformer{
+			Fetcher:    &mocks.MockLogFetcher{},
+			Converter:  &ilk_mocks.MockDripFileIlkConverter{},
+			Repository: repository,
+		}
+
+		err := transformer.Execute()
+
+		Expect(err).To(HaveOccurred())
+		Expect(err).To(MatchError(fakes.FakeError))
+	})
+
+	It("fetches logs for missing headers", func() {
+		fetcher := &mocks.MockLogFetcher{}
+		repository := &ilk_mocks.MockDripFileIlkRepository{}
+		repository.SetMissingHeaders([]core.Header{{BlockNumber: 1}, {BlockNumber: 2}})
+		transformer := ilk.DripFileIlkTransformer{
+			Fetcher:    fetcher,
+			Converter:  &ilk_mocks.MockDripFileIlkConverter{},
+			Repository: repository,
+		}
+
+		err := transformer.Execute()
+
+		Expect(err).NotTo(HaveOccurred())
+		Expect(fetcher.FetchedBlocks).To(Equal([]int64{1, 2}))
+		Expect(fetcher.FetchedContractAddress).To(Equal(drip_file.DripFileConfig.ContractAddress))
+		Expect(fetcher.FetchedTopics).To(Equal([][]common.Hash{{common.HexToHash(shared.DripFileIlkSignature)}}))
+	})
+
+	It("returns error if fetcher returns error", func() {
+		fetcher := &mocks.MockLogFetcher{}
+		fetcher.SetFetcherError(fakes.FakeError)
+		repository := &ilk_mocks.MockDripFileIlkRepository{}
+		repository.SetMissingHeaders([]core.Header{{BlockNumber: 1}})
+		transformer := ilk.DripFileIlkTransformer{
+			Fetcher:    fetcher,
+			Converter:  &ilk_mocks.MockDripFileIlkConverter{},
+			Repository: repository,
+		}
+
+		err := transformer.Execute()
+
+		Expect(err).To(HaveOccurred())
+		Expect(err).To(MatchError(fakes.FakeError))
+	})
+
+	It("converts matching logs", func() {
+		converter := &ilk_mocks.MockDripFileIlkConverter{}
+		fetcher := &mocks.MockLogFetcher{}
+		fetcher.SetFetchedLogs([]types.Log{test_data.EthDripFileIlkLog})
+		repository := &ilk_mocks.MockDripFileIlkRepository{}
+		repository.SetMissingHeaders([]core.Header{{BlockNumber: 1}})
+		transformer := ilk.DripFileIlkTransformer{
+			Fetcher:    fetcher,
+			Converter:  converter,
+			Repository: repository,
+		}
+
+		err := transformer.Execute()
+
+		Expect(err).NotTo(HaveOccurred())
+		Expect(converter.PassedLog).To(Equal(test_data.EthDripFileIlkLog))
+	})
+
+	It("returns error if converter returns error", func() {
+		converter := &ilk_mocks.MockDripFileIlkConverter{}
+		converter.SetConverterError(fakes.FakeError)
+		fetcher := &mocks.MockLogFetcher{}
+		fetcher.SetFetchedLogs([]types.Log{test_data.EthDripFileIlkLog})
+		repository := &ilk_mocks.MockDripFileIlkRepository{}
+		repository.SetMissingHeaders([]core.Header{{BlockNumber: 1}})
+		transformer := ilk.DripFileIlkTransformer{
+			Fetcher:    fetcher,
+			Converter:  converter,
+			Repository: repository,
+		}
+
+		err := transformer.Execute()
+
+		Expect(err).To(HaveOccurred())
+		Expect(err).To(MatchError(fakes.FakeError))
+	})
+
+	It("persists drip file model", func() {
+		converter := &ilk_mocks.MockDripFileIlkConverter{}
+		fetcher := &mocks.MockLogFetcher{}
+		fetcher.SetFetchedLogs([]types.Log{test_data.EthDripFileIlkLog})
+		repository := &ilk_mocks.MockDripFileIlkRepository{}
+		fakeHeader := core.Header{BlockNumber: 1, Id: 2}
+		repository.SetMissingHeaders([]core.Header{fakeHeader})
+		transformer := ilk.DripFileIlkTransformer{
+			Fetcher:    fetcher,
+			Converter:  converter,
+			Repository: repository,
+		}
+
+		err := transformer.Execute()
+
+		Expect(err).NotTo(HaveOccurred())
+		Expect(repository.PassedHeaderID).To(Equal(fakeHeader.Id))
+		Expect(repository.PassedModel).To(Equal(test_data.DripFileIlkModel))
+	})
+
+	It("returns error if repository returns error for create", func() {
+		converter := &ilk_mocks.MockDripFileIlkConverter{}
+		fetcher := &mocks.MockLogFetcher{}
+		fetcher.SetFetchedLogs([]types.Log{test_data.EthDripFileIlkLog})
+		repository := &ilk_mocks.MockDripFileIlkRepository{}
+		repository.SetMissingHeaders([]core.Header{{BlockNumber: 1, Id: 2}})
+		repository.SetCreateError(fakes.FakeError)
+		transformer := ilk.DripFileIlkTransformer{
+			Fetcher:    fetcher,
+			Converter:  converter,
+			Repository: repository,
+		}
+
+		err := transformer.Execute()
+
+		Expect(err).To(HaveOccurred())
+		Expect(err).To(MatchError(fakes.FakeError))
+	})
+})

pkg/transformers/drip_file/repo/converter.go

@@ -0,0 +1,52 @@
+// Copyright 2018 Vulcanize
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package repo
+
+import (
+	"bytes"
+	"encoding/json"
+	"errors"
+	"github.com/ethereum/go-ethereum/core/types"
+	"math/big"
+)
+
+type Converter interface {
+	ToModel(ethLog types.Log) (DripFileRepoModel, error)
+}
+
+type DripFileRepoConverter struct{}
+
+func (DripFileRepoConverter) ToModel(ethLog types.Log) (DripFileRepoModel, error) {
+	err := verifyLog(ethLog)
+	if err != nil {
+		return DripFileRepoModel{}, err
+	}
+	what := string(bytes.Trim(ethLog.Topics[2].Bytes(), "\x00"))
+	data := big.NewInt(0).SetBytes(ethLog.Topics[3].Bytes()).String()
+	raw, err := json.Marshal(ethLog)
+	return DripFileRepoModel{
+		What:             what,
+		Data:             data,
+		TransactionIndex: ethLog.TxIndex,
+		Raw:              raw,
+	}, err
+}
+
+func verifyLog(log types.Log) error {
+	if len(log.Topics) < 4 {
+		return errors.New("log missing topics")
+	}
+	return nil
+}

pkg/transformers/drip_file/repo/converter_test.go

@@ -0,0 +1,48 @@
+// Copyright 2018 Vulcanize
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package repo_test
+
+import (
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/drip_file/repo"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/test_data"
+)
+
+var _ = Describe("Drip file repo converter", func() {
+	It("returns err if log missing topics", func() {
+		converter := repo.DripFileRepoConverter{}
+		badLog := types.Log{
+			Topics: []common.Hash{{}},
+			Data:   []byte{1, 1, 1, 1, 1},
+		}
+
+		_, err := converter.ToModel(badLog)
+
+		Expect(err).To(HaveOccurred())
+	})
+
+	It("converts a log to a model", func() {
+		converter := repo.DripFileRepoConverter{}
+
+		model, err := converter.ToModel(test_data.EthDripFileRepoLog)
+
+		Expect(err).NotTo(HaveOccurred())
+		Expect(model).To(Equal(test_data.DripFileRepoModel))
+	})
+})

pkg/transformers/drip_file/repo/model.go

@@ -0,0 +1,22 @@
+// Copyright 2018 Vulcanize
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package repo
+
+type DripFileRepoModel struct {
+	What             string
+	Data             string
+	TransactionIndex uint   `db:"tx_idx"`
+	Raw              []byte `db:"raw_log"`
+}

pkg/transformers/drip_file/repo/repo_suite_test.go

@@ -0,0 +1,27 @@
+// Copyright 2018 Vulcanize
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package repo_test
+
+import (
+	"testing"
+
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+)
+
+func TestRepo(t *testing.T) {
+	RegisterFailHandler(Fail)
+	RunSpecs(t, "Repo Suite")
+}

pkg/transformers/drip_file/repo/repository.go

@@ -0,0 +1,59 @@
+// Copyright 2018 Vulcanize
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package repo
+
+import (
+	"github.com/vulcanize/vulcanizedb/pkg/core"
+	"github.com/vulcanize/vulcanizedb/pkg/datastore/postgres"
+)
+
+type Repository interface {
+	Create(headerID int64, model DripFileRepoModel) error
+	MissingHeaders(startingBlockNumber, endingBlockNumber int64) ([]core.Header, error)
+}
+
+type DripFileRepoRepository struct {
+	db *postgres.DB
+}
+
+func NewDripFileRepoRepository(db *postgres.DB) DripFileRepoRepository {
+	return DripFileRepoRepository{db: db}
+}
+
+func (repository DripFileRepoRepository) Create(headerID int64, model DripFileRepoModel) error {
+	_, err := repository.db.Exec(
+		`INSERT into maker.drip_file_repo (header_id, what, data, tx_idx, raw_log)
+        VALUES($1, $2, $3::NUMERIC, $4, $5)`,
+		headerID, model.What, model.Data, model.TransactionIndex, model.Raw,
+	)
+	return err
+}
+
+func (repository DripFileRepoRepository) MissingHeaders(startingBlockNumber, endingBlockNumber int64) ([]core.Header, error) {
+	var result []core.Header
+	err := repository.db.Select(
+		&result,
+		`SELECT headers.id, headers.block_number FROM headers
+               LEFT JOIN maker.drip_file_repo on headers.id = header_id
+               WHERE header_id ISNULL
+               AND headers.block_number >= $1
+               AND headers.block_number <= $2
+               AND headers.eth_node_fingerprint = $3`,
+		startingBlockNumber,
+		endingBlockNumber,
+		repository.db.Node.ID,
+	)
+	return result, err
+}

pkg/transformers/drip_file/repo/repository_test.go

@@ -0,0 +1,142 @@
+// Copyright 2018 Vulcanize
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package repo_test
+
+import (
+	"database/sql"
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+	"github.com/vulcanize/vulcanizedb/pkg/core"
+	"github.com/vulcanize/vulcanizedb/pkg/datastore/postgres/repositories"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/drip_file/repo"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/test_data"
+	"github.com/vulcanize/vulcanizedb/test_config"
+)
+
+var _ = Describe("", func() {
+	Describe("Create", func() {
+		It("adds a drip file repo event", func() {
+			db := test_config.NewTestDB(core.Node{})
+			test_config.CleanTestDB(db)
+			headerRepository := repositories.NewHeaderRepository(db)
+			headerID, err := headerRepository.CreateOrUpdateHeader(core.Header{})
+			Expect(err).NotTo(HaveOccurred())
+			dripFileRepoRepository := repo.NewDripFileRepoRepository(db)
+
+			err = dripFileRepoRepository.Create(headerID, test_data.DripFileRepoModel)
+
+			Expect(err).NotTo(HaveOccurred())
+			var dbDripFileRepo repo.DripFileRepoModel
+			err = db.Get(&dbDripFileRepo, `SELECT what, data, tx_idx, raw_log FROM maker.drip_file_repo WHERE header_id = $1`, headerID)
+			Expect(err).NotTo(HaveOccurred())
+			Expect(dbDripFileRepo.What).To(Equal(test_data.DripFileRepoModel.What))
+			Expect(dbDripFileRepo.Data).To(Equal(test_data.DripFileRepoModel.Data))
+			Expect(dbDripFileRepo.TransactionIndex).To(Equal(test_data.DripFileRepoModel.TransactionIndex))
+			Expect(dbDripFileRepo.Raw).To(MatchJSON(test_data.DripFileRepoModel.Raw))
+		})
+
+		It("does not duplicate drip file events", func() {
+			db := test_config.NewTestDB(core.Node{})
+			test_config.CleanTestDB(db)
+			headerRepository := repositories.NewHeaderRepository(db)
+			headerID, err := headerRepository.CreateOrUpdateHeader(core.Header{})
+			Expect(err).NotTo(HaveOccurred())
+			dripFileRepoRepository := repo.NewDripFileRepoRepository(db)
+			err = dripFileRepoRepository.Create(headerID, test_data.DripFileRepoModel)
+			Expect(err).NotTo(HaveOccurred())
+
+			err = dripFileRepoRepository.Create(headerID, test_data.DripFileRepoModel)
+
+			Expect(err).To(HaveOccurred())
+			Expect(err.Error()).To(ContainSubstring("pq: duplicate key value violates unique constraint"))
+		})
+
+		It("removes drip file if corresponding header is deleted", func() {
+			db := test_config.NewTestDB(core.Node{})
+			test_config.CleanTestDB(db)
+			headerRepository := repositories.NewHeaderRepository(db)
+			headerID, err := headerRepository.CreateOrUpdateHeader(core.Header{})
+			Expect(err).NotTo(HaveOccurred())
+			dripFileRepoRepository := repo.NewDripFileRepoRepository(db)
+			err = dripFileRepoRepository.Create(headerID, test_data.DripFileRepoModel)
+			Expect(err).NotTo(HaveOccurred())
+
+			_, err = db.Exec(`DELETE FROM headers WHERE id = $1`, headerID)
+
+			Expect(err).NotTo(HaveOccurred())
+			var dbDripFileRepo repo.DripFileRepoModel
+			err = db.Get(&dbDripFileRepo, `SELECT what, data, tx_idx, raw_log FROM maker.drip_file_repo WHERE header_id = $1`, headerID)
+			Expect(err).To(HaveOccurred())
+			Expect(err).To(MatchError(sql.ErrNoRows))
+		})
+	})
+
+	Describe("MissingHeaders", func() {
+		It("returns headers with no associated drip file event", func() {
+			db := test_config.NewTestDB(core.Node{})
+			test_config.CleanTestDB(db)
+			headerRepository := repositories.NewHeaderRepository(db)
+			startingBlockNumber := int64(1)
+			dripFileRepoBlockNumber := int64(2)
+			endingBlockNumber := int64(3)
+			blockNumbers := []int64{startingBlockNumber, dripFileRepoBlockNumber, endingBlockNumber, endingBlockNumber + 1}
+			var headerIDs []int64
+			for _, n := range blockNumbers {
+				headerID, err := headerRepository.CreateOrUpdateHeader(core.Header{BlockNumber: n})
+				headerIDs = append(headerIDs, headerID)
+				Expect(err).NotTo(HaveOccurred())
+			}
+			dripFileRepoRepository := repo.NewDripFileRepoRepository(db)
+			err := dripFileRepoRepository.Create(headerIDs[1], test_data.DripFileRepoModel)
+			Expect(err).NotTo(HaveOccurred())
+
+			headers, err := dripFileRepoRepository.MissingHeaders(startingBlockNumber, endingBlockNumber)
+
+			Expect(err).NotTo(HaveOccurred())
+			Expect(len(headers)).To(Equal(2))
+			Expect(headers[0].BlockNumber).To(Or(Equal(startingBlockNumber), Equal(endingBlockNumber)))
+			Expect(headers[1].BlockNumber).To(Or(Equal(startingBlockNumber), Equal(endingBlockNumber)))
+		})
+
+		It("only returns headers associated with the current node", func() {
+			db := test_config.NewTestDB(core.Node{})
+			test_config.CleanTestDB(db)
+			blockNumbers := []int64{1, 2, 3}
+			headerRepository := repositories.NewHeaderRepository(db)
+			dbTwo := test_config.NewTestDB(core.Node{ID: "second"})
+			headerRepositoryTwo := repositories.NewHeaderRepository(dbTwo)
+			var headerIDs []int64
+			for _, n := range blockNumbers {
+				headerID, err := headerRepository.CreateOrUpdateHeader(core.Header{BlockNumber: n})
+				Expect(err).NotTo(HaveOccurred())
+				headerIDs = append(headerIDs, headerID)
+				_, err = headerRepositoryTwo.CreateOrUpdateHeader(core.Header{BlockNumber: n})
+				Expect(err).NotTo(HaveOccurred())
+			}
+			dripFileRepoRepository := repo.NewDripFileRepoRepository(db)
+			dripFileRepoRepositoryTwo := repo.NewDripFileRepoRepository(dbTwo)
+			err := dripFileRepoRepository.Create(headerIDs[0], test_data.DripFileRepoModel)
+			Expect(err).NotTo(HaveOccurred())
+
+			nodeOneMissingHeaders, err := dripFileRepoRepository.MissingHeaders(blockNumbers[0], blockNumbers[len(blockNumbers)-1])
+			Expect(err).NotTo(HaveOccurred())
+			Expect(len(nodeOneMissingHeaders)).To(Equal(len(blockNumbers) - 1))
+
+			nodeTwoMissingHeaders, err := dripFileRepoRepositoryTwo.MissingHeaders(blockNumbers[0], blockNumbers[len(blockNumbers)-1])
+			Expect(err).NotTo(HaveOccurred())
+			Expect(len(nodeTwoMissingHeaders)).To(Equal(len(blockNumbers)))
+		})
+	})
+})

pkg/transformers/drip_file/repo/transformer.go

@@ -0,0 +1,71 @@
+// Copyright 2018 Vulcanize
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package repo
+
+import (
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/vulcanize/vulcanizedb/pkg/core"
+	"github.com/vulcanize/vulcanizedb/pkg/datastore/postgres"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/drip_file"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/shared"
+)
+
+type DripFileRepoTransformer struct {
+	Config     shared.TransformerConfig
+	Converter  Converter
+	Fetcher    shared.LogFetcher
+	Repository Repository
+}
+
+type DripFileRepoTransformerInitializer struct {
+	Config shared.TransformerConfig
+}
+
+func (initializer DripFileRepoTransformerInitializer) NewDripFileRepoTransformer(db *postgres.DB, blockChain core.BlockChain) shared.Transformer {
+	converter := DripFileRepoConverter{}
+	fetcher := shared.NewFetcher(blockChain)
+	repository := NewDripFileRepoRepository(db)
+	return DripFileRepoTransformer{
+		Config:     initializer.Config,
+		Converter:  converter,
+		Fetcher:    fetcher,
+		Repository: repository,
+	}
+}
+
+func (transformer DripFileRepoTransformer) Execute() error {
+	missingHeaders, err := transformer.Repository.MissingHeaders(transformer.Config.StartingBlockNumber, transformer.Config.EndingBlockNumber)
+	if err != nil {
+		return err
+	}
+	for _, header := range missingHeaders {
+		topics := [][]common.Hash{{common.HexToHash(shared.DripFileRepoSignature)}}
+		matchingLogs, err := transformer.Fetcher.FetchLogs(drip_file.DripFileConfig.ContractAddress, topics, header.BlockNumber)
+		if err != nil {
+			return err
+		}
+		for _, log := range matchingLogs {
+			model, err := transformer.Converter.ToModel(log)
+			if err != nil {
+				return err
+			}
+			err = transformer.Repository.Create(header.Id, model)
+			if err != nil {
+				return err
+			}
+		}
+	}
+	return nil
+}

pkg/transformers/drip_file/repo/transformer_test.go

@@ -0,0 +1,175 @@
+// Copyright 2018 Vulcanize
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package repo_test
+
+import (
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/core/types"
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+
+	"github.com/vulcanize/vulcanizedb/pkg/core"
+	"github.com/vulcanize/vulcanizedb/pkg/fakes"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/drip_file"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/drip_file/repo"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/shared"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/test_data"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/test_data/mocks"
+	repo_mocks "github.com/vulcanize/vulcanizedb/pkg/transformers/test_data/mocks/drip_file/repo"
+)
+
+var _ = Describe("Drip file repo transformer", func() {
+	It("gets missing headers for block numbers specified in config", func() {
+		repository := &repo_mocks.MockDripFileRepoRepository{}
+		transformer := repo.DripFileRepoTransformer{
+			Config:     drip_file.DripFileConfig,
+			Fetcher:    &mocks.MockLogFetcher{},
+			Converter:  &repo_mocks.MockDripFileRepoConverter{},
+			Repository: repository,
+		}
+
+		err := transformer.Execute()
+
+		Expect(err).NotTo(HaveOccurred())
+		Expect(repository.PassedStartingBlockNumber).To(Equal(drip_file.DripFileConfig.StartingBlockNumber))
+		Expect(repository.PassedEndingBlockNumber).To(Equal(drip_file.DripFileConfig.EndingBlockNumber))
+	})
+
+	It("returns error if repository returns error for missing headers", func() {
+		repository := &repo_mocks.MockDripFileRepoRepository{}
+		repository.SetMissingHeadersErr(fakes.FakeError)
+		transformer := repo.DripFileRepoTransformer{
+			Fetcher:    &mocks.MockLogFetcher{},
+			Converter:  &repo_mocks.MockDripFileRepoConverter{},
+			Repository: repository,
+		}
+
+		err := transformer.Execute()
+
+		Expect(err).To(HaveOccurred())
+		Expect(err).To(MatchError(fakes.FakeError))
+	})
+
+	It("fetches logs for missing headers", func() {
+		fetcher := &mocks.MockLogFetcher{}
+		repository := &repo_mocks.MockDripFileRepoRepository{}
+		repository.SetMissingHeaders([]core.Header{{BlockNumber: 1}, {BlockNumber: 2}})
+		transformer := repo.DripFileRepoTransformer{
+			Fetcher:    fetcher,
+			Converter:  &repo_mocks.MockDripFileRepoConverter{},
+			Repository: repository,
+		}
+
+		err := transformer.Execute()
+
+		Expect(err).NotTo(HaveOccurred())
+		Expect(fetcher.FetchedBlocks).To(Equal([]int64{1, 2}))
+		Expect(fetcher.FetchedContractAddress).To(Equal(drip_file.DripFileConfig.ContractAddress))
+		Expect(fetcher.FetchedTopics).To(Equal([][]common.Hash{{common.HexToHash(shared.DripFileRepoSignature)}}))
+	})
+
+	It("returns error if fetcher returns error", func() {
+		fetcher := &mocks.MockLogFetcher{}
+		fetcher.SetFetcherError(fakes.FakeError)
+		repository := &repo_mocks.MockDripFileRepoRepository{}
+		repository.SetMissingHeaders([]core.Header{{BlockNumber: 1}})
+		transformer := repo.DripFileRepoTransformer{
+			Fetcher:    fetcher,
+			Converter:  &repo_mocks.MockDripFileRepoConverter{},
+			Repository: repository,
+		}
+
+		err := transformer.Execute()
+
+		Expect(err).To(HaveOccurred())
+		Expect(err).To(MatchError(fakes.FakeError))
+	})
+
+	It("converts matching logs", func() {
+		converter := &repo_mocks.MockDripFileRepoConverter{}
+		fetcher := &mocks.MockLogFetcher{}
+		fetcher.SetFetchedLogs([]types.Log{test_data.EthDripFileRepoLog})
+		repository := &repo_mocks.MockDripFileRepoRepository{}
+		repository.SetMissingHeaders([]core.Header{{BlockNumber: 1}})
+		transformer := repo.DripFileRepoTransformer{
+			Fetcher:    fetcher,
+			Converter:  converter,
+			Repository: repository,
+		}
+
+		err := transformer.Execute()
+
+		Expect(err).NotTo(HaveOccurred())
+		Expect(converter.PassedLog).To(Equal(test_data.EthDripFileRepoLog))
+	})
+
+	It("returns error if converter returns error", func() {
+		converter := &repo_mocks.MockDripFileRepoConverter{}
+		converter.SetConverterError(fakes.FakeError)
+		fetcher := &mocks.MockLogFetcher{}
+		fetcher.SetFetchedLogs([]types.Log{test_data.EthDripFileRepoLog})
+		repository := &repo_mocks.MockDripFileRepoRepository{}
+		repository.SetMissingHeaders([]core.Header{{BlockNumber: 1}})
+		transformer := repo.DripFileRepoTransformer{
+			Fetcher:    fetcher,
+			Converter:  converter,
+			Repository: repository,
+		}
+
+		err := transformer.Execute()
+
+		Expect(err).To(HaveOccurred())
+		Expect(err).To(MatchError(fakes.FakeError))
+	})
+
+	It("persists drip file model", func() {
+		converter := &repo_mocks.MockDripFileRepoConverter{}
+		fetcher := &mocks.MockLogFetcher{}
+		fetcher.SetFetchedLogs([]types.Log{test_data.EthDripFileRepoLog})
+		repository := &repo_mocks.MockDripFileRepoRepository{}
+		fakeHeader := core.Header{BlockNumber: 1, Id: 2}
+		repository.SetMissingHeaders([]core.Header{fakeHeader})
+		transformer := repo.DripFileRepoTransformer{
+			Fetcher:    fetcher,
+			Converter:  converter,
+			Repository: repository,
+		}
+
+		err := transformer.Execute()
+
+		Expect(err).NotTo(HaveOccurred())
+		Expect(repository.PassedHeaderID).To(Equal(fakeHeader.Id))
+		Expect(repository.PassedModel).To(Equal(test_data.DripFileRepoModel))
+	})
+
+	It("returns error if repository returns error for create", func() {
+		converter := &repo_mocks.MockDripFileRepoConverter{}
+		fetcher := &mocks.MockLogFetcher{}
+		fetcher.SetFetchedLogs([]types.Log{test_data.EthDripFileRepoLog})
+		repository := &repo_mocks.MockDripFileRepoRepository{}
+		repository.SetMissingHeaders([]core.Header{{BlockNumber: 1, Id: 2}})
+		repository.SetCreateError(fakes.FakeError)
+		transformer := repo.DripFileRepoTransformer{
+			Fetcher:    fetcher,
+			Converter:  converter,
+			Repository: repository,
+		}
+
+		err := transformer.Execute()
+
+		Expect(err).To(HaveOccurred())
+		Expect(err).To(MatchError(fakes.FakeError))
+	})
+})

pkg/transformers/drip_file/vow/converter.go

@@ -0,0 +1,51 @@
+// Copyright 2018 Vulcanize
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package vow
+
+import (
+	"bytes"
+	"encoding/json"
+	"errors"
+	"github.com/ethereum/go-ethereum/core/types"
+)
+
+type Converter interface {
+	ToModel(ethLog types.Log) (DripFileVowModel, error)
+}
+
+type DripFileVowConverter struct{}
+
+func (DripFileVowConverter) ToModel(ethLog types.Log) (DripFileVowModel, error) {
+	err := verifyLog(ethLog)
+	if err != nil {
+		return DripFileVowModel{}, err
+	}
+	what := string(bytes.Trim(ethLog.Topics[2].Bytes(), "\x00"))
+	data := string(bytes.Trim(ethLog.Topics[3].Bytes(), "\x00"))
+	raw, err := json.Marshal(ethLog)
+	return DripFileVowModel{
+		What:             what,
+		Data:             data,
+		TransactionIndex: ethLog.TxIndex,
+		Raw:              raw,
+	}, err
+}
+
+func verifyLog(log types.Log) error {
+	if len(log.Topics) < 4 {
+		return errors.New("log missing topics")
+	}
+	return nil
+}

pkg/transformers/drip_file/vow/converter_test.go

@@ -0,0 +1,48 @@
+// Copyright 2018 Vulcanize
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package vow_test
+
+import (
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/drip_file/vow"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/test_data"
+)
+
+var _ = Describe("Drip file repo converter", func() {
+	It("returns err if log missing topics", func() {
+		converter := vow.DripFileVowConverter{}
+		badLog := types.Log{
+			Topics: []common.Hash{{}},
+			Data:   []byte{1, 1, 1, 1, 1},
+		}
+
+		_, err := converter.ToModel(badLog)
+
+		Expect(err).To(HaveOccurred())
+	})
+
+	It("converts a log to a model", func() {
+		converter := vow.DripFileVowConverter{}
+
+		model, err := converter.ToModel(test_data.EthDripFileVowLog)
+
+		Expect(err).NotTo(HaveOccurred())
+		Expect(model).To(Equal(test_data.DripFileVowModel))
+	})
+})

pkg/transformers/drip_file/vow/model.go

@@ -0,0 +1,22 @@
+// Copyright 2018 Vulcanize
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package vow
+
+type DripFileVowModel struct {
+	What             string
+	Data             string
+	TransactionIndex uint   `db:"tx_idx"`
+	Raw              []byte `db:"raw_log"`
+}

pkg/transformers/drip_file/vow/repository.go

@@ -0,0 +1,59 @@
+// Copyright 2018 Vulcanize
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package vow
+
+import (
+	"github.com/vulcanize/vulcanizedb/pkg/core"
+	"github.com/vulcanize/vulcanizedb/pkg/datastore/postgres"
+)
+
+type Repository interface {
+	Create(headerID int64, model DripFileVowModel) error
+	MissingHeaders(startingBlockNumber, endingBlockNumber int64) ([]core.Header, error)
+}
+
+type DripFileVowRepository struct {
+	db *postgres.DB
+}
+
+func NewDripFileVowRepository(db *postgres.DB) DripFileVowRepository {
+	return DripFileVowRepository{db: db}
+}
+
+func (repository DripFileVowRepository) Create(headerID int64, model DripFileVowModel) error {
+	_, err := repository.db.Exec(
+		`INSERT into maker.drip_file_vow (header_id, what, data, tx_idx, raw_log)
+        VALUES($1, $2, $3, $4, $5)`,
+		headerID, model.What, model.Data, model.TransactionIndex, model.Raw,
+	)
+	return err
+}
+
+func (repository DripFileVowRepository) MissingHeaders(startingBlockNumber, endingBlockNumber int64) ([]core.Header, error) {
+	var result []core.Header
+	err := repository.db.Select(
+		&result,
+		`SELECT headers.id, headers.block_number FROM headers
+               LEFT JOIN maker.drip_file_vow on headers.id = header_id
+               WHERE header_id ISNULL
+               AND headers.block_number >= $1
+               AND headers.block_number <= $2
+               AND headers.eth_node_fingerprint = $3`,
+		startingBlockNumber,
+		endingBlockNumber,
+		repository.db.Node.ID,
+	)
+	return result, err
+}

pkg/transformers/drip_file/vow/repository_test.go

@@ -0,0 +1,142 @@
+// Copyright 2018 Vulcanize
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package vow_test
+
+import (
+	"database/sql"
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+	"github.com/vulcanize/vulcanizedb/pkg/core"
+	"github.com/vulcanize/vulcanizedb/pkg/datastore/postgres/repositories"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/drip_file/vow"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/test_data"
+	"github.com/vulcanize/vulcanizedb/test_config"
+)
+
+var _ = Describe("", func() {
+	Describe("Create", func() {
+		It("adds a drip file vow event", func() {
+			db := test_config.NewTestDB(core.Node{})
+			test_config.CleanTestDB(db)
+			headerRepository := repositories.NewHeaderRepository(db)
+			headerID, err := headerRepository.CreateOrUpdateHeader(core.Header{})
+			Expect(err).NotTo(HaveOccurred())
+			dripFileVowRepository := vow.NewDripFileVowRepository(db)
+
+			err = dripFileVowRepository.Create(headerID, test_data.DripFileVowModel)
+
+			Expect(err).NotTo(HaveOccurred())
+			var dbDripFileVow vow.DripFileVowModel
+			err = db.Get(&dbDripFileVow, `SELECT what, data, tx_idx, raw_log FROM maker.drip_file_vow WHERE header_id = $1`, headerID)
+			Expect(err).NotTo(HaveOccurred())
+			Expect(dbDripFileVow.What).To(Equal(test_data.DripFileVowModel.What))
+			Expect(dbDripFileVow.Data).To(Equal(test_data.DripFileVowModel.Data))
+			Expect(dbDripFileVow.TransactionIndex).To(Equal(test_data.DripFileVowModel.TransactionIndex))
+			Expect(dbDripFileVow.Raw).To(MatchJSON(test_data.DripFileVowModel.Raw))
+		})
+
+		It("does not duplicate drip file events", func() {
+			db := test_config.NewTestDB(core.Node{})
+			test_config.CleanTestDB(db)
+			headerRepository := repositories.NewHeaderRepository(db)
+			headerID, err := headerRepository.CreateOrUpdateHeader(core.Header{})
+			Expect(err).NotTo(HaveOccurred())
+			dripFileVowRepository := vow.NewDripFileVowRepository(db)
+			err = dripFileVowRepository.Create(headerID, test_data.DripFileVowModel)
+			Expect(err).NotTo(HaveOccurred())
+
+			err = dripFileVowRepository.Create(headerID, test_data.DripFileVowModel)
+
+			Expect(err).To(HaveOccurred())
+			Expect(err.Error()).To(ContainSubstring("pq: duplicate key value violates unique constraint"))
+		})
+
+		It("removes drip file if corresponding header is deleted", func() {
+			db := test_config.NewTestDB(core.Node{})
+			test_config.CleanTestDB(db)
+			headerRepository := repositories.NewHeaderRepository(db)
+			headerID, err := headerRepository.CreateOrUpdateHeader(core.Header{})
+			Expect(err).NotTo(HaveOccurred())
+			dripFileVowRepository := vow.NewDripFileVowRepository(db)
+			err = dripFileVowRepository.Create(headerID, test_data.DripFileVowModel)
+			Expect(err).NotTo(HaveOccurred())
+
+			_, err = db.Exec(`DELETE FROM headers WHERE id = $1`, headerID)
+
+			Expect(err).NotTo(HaveOccurred())
+			var dbDripFileVow vow.DripFileVowModel
+			err = db.Get(&dbDripFileVow, `SELECT what, data, tx_idx, raw_log FROM maker.drip_file_vow WHERE header_id = $1`, headerID)
+			Expect(err).To(HaveOccurred())
+			Expect(err).To(MatchError(sql.ErrNoRows))
+		})
+	})
+
+	Describe("MissingHeaders", func() {
+		It("returns headers with no associated drip file event", func() {
+			db := test_config.NewTestDB(core.Node{})
+			test_config.CleanTestDB(db)
+			headerRepository := repositories.NewHeaderRepository(db)
+			startingBlockNumber := int64(1)
+			dripFileVowBlockNumber := int64(2)
+			endingBlockNumber := int64(3)
+			blockNumbers := []int64{startingBlockNumber, dripFileVowBlockNumber, endingBlockNumber, endingBlockNumber + 1}
+			var headerIDs []int64
+			for _, n := range blockNumbers {
+				headerID, err := headerRepository.CreateOrUpdateHeader(core.Header{BlockNumber: n})
+				headerIDs = append(headerIDs, headerID)
+				Expect(err).NotTo(HaveOccurred())
+			}
+			dripFileVowRepository := vow.NewDripFileVowRepository(db)
+			err := dripFileVowRepository.Create(headerIDs[1], test_data.DripFileVowModel)
+			Expect(err).NotTo(HaveOccurred())
+
+			headers, err := dripFileVowRepository.MissingHeaders(startingBlockNumber, endingBlockNumber)
+
+			Expect(err).NotTo(HaveOccurred())
+			Expect(len(headers)).To(Equal(2))
+			Expect(headers[0].BlockNumber).To(Or(Equal(startingBlockNumber), Equal(endingBlockNumber)))
+			Expect(headers[1].BlockNumber).To(Or(Equal(startingBlockNumber), Equal(endingBlockNumber)))
+		})
+
+		It("only returns headers associated with the current node", func() {
+			db := test_config.NewTestDB(core.Node{})
+			test_config.CleanTestDB(db)
+			blockNumbers := []int64{1, 2, 3}
+			headerRepository := repositories.NewHeaderRepository(db)
+			dbTwo := test_config.NewTestDB(core.Node{ID: "second"})
+			headerRepositoryTwo := repositories.NewHeaderRepository(dbTwo)
+			var headerIDs []int64
+			for _, n := range blockNumbers {
+				headerID, err := headerRepository.CreateOrUpdateHeader(core.Header{BlockNumber: n})
+				Expect(err).NotTo(HaveOccurred())
+				headerIDs = append(headerIDs, headerID)
+				_, err = headerRepositoryTwo.CreateOrUpdateHeader(core.Header{BlockNumber: n})
+				Expect(err).NotTo(HaveOccurred())
+			}
+			dripFileVowRepository := vow.NewDripFileVowRepository(db)
+			dripFileVowRepositoryTwo := vow.NewDripFileVowRepository(dbTwo)
+			err := dripFileVowRepository.Create(headerIDs[0], test_data.DripFileVowModel)
+			Expect(err).NotTo(HaveOccurred())
+
+			nodeOneMissingHeaders, err := dripFileVowRepository.MissingHeaders(blockNumbers[0], blockNumbers[len(blockNumbers)-1])
+			Expect(err).NotTo(HaveOccurred())
+			Expect(len(nodeOneMissingHeaders)).To(Equal(len(blockNumbers) - 1))
+
+			nodeTwoMissingHeaders, err := dripFileVowRepositoryTwo.MissingHeaders(blockNumbers[0], blockNumbers[len(blockNumbers)-1])
+			Expect(err).NotTo(HaveOccurred())
+			Expect(len(nodeTwoMissingHeaders)).To(Equal(len(blockNumbers)))
+		})
+	})
+})

pkg/transformers/drip_file/vow/transformer.go

@@ -0,0 +1,53 @@
+// Copyright 2018 Vulcanize
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package vow
+
+import (
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/drip_file"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/shared"
+)
+
+type DripFileVowTransformer struct {
+	Config     shared.TransformerConfig
+	Converter  Converter
+	Fetcher    shared.LogFetcher
+	Repository Repository
+}
+
+func (transformer DripFileVowTransformer) Execute() error {
+	missingHeaders, err := transformer.Repository.MissingHeaders(transformer.Config.StartingBlockNumber, transformer.Config.EndingBlockNumber)
+	if err != nil {
+		return err
+	}
+	for _, header := range missingHeaders {
+		topics := [][]common.Hash{{common.HexToHash(shared.DripFileVowSignature)}}
+		matchingLogs, err := transformer.Fetcher.FetchLogs(drip_file.DripFileConfig.ContractAddress, topics, header.BlockNumber)
+		if err != nil {
+			return err
+		}
+		for _, log := range matchingLogs {
+			model, err := transformer.Converter.ToModel(log)
+			if err != nil {
+				return err
+			}
+			err = transformer.Repository.Create(header.Id, model)
+			if err != nil {
+				return err
+			}
+		}
+	}
+	return nil
+}

pkg/transformers/drip_file/vow/transformer_test.go

@@ -0,0 +1,175 @@
+// Copyright 2018 Vulcanize
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package vow_test
+
+import (
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/core/types"
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+
+	"github.com/vulcanize/vulcanizedb/pkg/core"
+	"github.com/vulcanize/vulcanizedb/pkg/fakes"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/drip_file"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/drip_file/vow"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/shared"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/test_data"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/test_data/mocks"
+	vow_mocks "github.com/vulcanize/vulcanizedb/pkg/transformers/test_data/mocks/drip_file/vow"
+)
+
+var _ = Describe("Drip file vow transformer", func() {
+	It("gets missing headers for block numbers specified in config", func() {
+		repository := &vow_mocks.MockDripFileVowRepository{}
+		transformer := vow.DripFileVowTransformer{
+			Config:     drip_file.DripFileConfig,
+			Fetcher:    &mocks.MockLogFetcher{},
+			Converter:  &vow_mocks.MockDripFileVowConverter{},
+			Repository: repository,
+		}
+
+		err := transformer.Execute()
+
+		Expect(err).NotTo(HaveOccurred())
+		Expect(repository.PassedStartingBlockNumber).To(Equal(drip_file.DripFileConfig.StartingBlockNumber))
+		Expect(repository.PassedEndingBlockNumber).To(Equal(drip_file.DripFileConfig.EndingBlockNumber))
+	})
+
+	It("returns error if repository returns error for missing headers", func() {
+		repository := &vow_mocks.MockDripFileVowRepository{}
+		repository.SetMissingHeadersErr(fakes.FakeError)
+		transformer := vow.DripFileVowTransformer{
+			Fetcher:    &mocks.MockLogFetcher{},
+			Converter:  &vow_mocks.MockDripFileVowConverter{},
+			Repository: repository,
+		}
+
+		err := transformer.Execute()
+
+		Expect(err).To(HaveOccurred())
+		Expect(err).To(MatchError(fakes.FakeError))
+	})
+
+	It("fetches logs for missing headers", func() {
+		fetcher := &mocks.MockLogFetcher{}
+		repository := &vow_mocks.MockDripFileVowRepository{}
+		repository.SetMissingHeaders([]core.Header{{BlockNumber: 1}, {BlockNumber: 2}})
+		transformer := vow.DripFileVowTransformer{
+			Fetcher:    fetcher,
+			Converter:  &vow_mocks.MockDripFileVowConverter{},
+			Repository: repository,
+		}
+
+		err := transformer.Execute()
+
+		Expect(err).NotTo(HaveOccurred())
+		Expect(fetcher.FetchedBlocks).To(Equal([]int64{1, 2}))
+		Expect(fetcher.FetchedContractAddress).To(Equal(drip_file.DripFileConfig.ContractAddress))
+		Expect(fetcher.FetchedTopics).To(Equal([][]common.Hash{{common.HexToHash(shared.DripFileVowSignature)}}))
+	})
+
+	It("returns error if fetcher returns error", func() {
+		fetcher := &mocks.MockLogFetcher{}
+		fetcher.SetFetcherError(fakes.FakeError)
+		repository := &vow_mocks.MockDripFileVowRepository{}
+		repository.SetMissingHeaders([]core.Header{{BlockNumber: 1}})
+		transformer := vow.DripFileVowTransformer{
+			Fetcher:    fetcher,
+			Converter:  &vow_mocks.MockDripFileVowConverter{},
+			Repository: repository,
+		}
+
+		err := transformer.Execute()
+
+		Expect(err).To(HaveOccurred())
+		Expect(err).To(MatchError(fakes.FakeError))
+	})
+
+	It("converts matching logs", func() {
+		converter := &vow_mocks.MockDripFileVowConverter{}
+		fetcher := &mocks.MockLogFetcher{}
+		fetcher.SetFetchedLogs([]types.Log{test_data.EthDripFileVowLog})
+		repository := &vow_mocks.MockDripFileVowRepository{}
+		repository.SetMissingHeaders([]core.Header{{BlockNumber: 1}})
+		transformer := vow.DripFileVowTransformer{
+			Fetcher:    fetcher,
+			Converter:  converter,
+			Repository: repository,
+		}
+
+		err := transformer.Execute()
+
+		Expect(err).NotTo(HaveOccurred())
+		Expect(converter.PassedLog).To(Equal(test_data.EthDripFileVowLog))
+	})
+
+	It("returns error if converter returns error", func() {
+		converter := &vow_mocks.MockDripFileVowConverter{}
+		converter.SetConverterError(fakes.FakeError)
+		fetcher := &mocks.MockLogFetcher{}
+		fetcher.SetFetchedLogs([]types.Log{test_data.EthDripFileVowLog})
+		repository := &vow_mocks.MockDripFileVowRepository{}
+		repository.SetMissingHeaders([]core.Header{{BlockNumber: 1}})
+		transformer := vow.DripFileVowTransformer{
+			Fetcher:    fetcher,
+			Converter:  converter,
+			Repository: repository,
+		}
+
+		err := transformer.Execute()
+
+		Expect(err).To(HaveOccurred())
+		Expect(err).To(MatchError(fakes.FakeError))
+	})
+
+	It("persists drip file model", func() {
+		converter := &vow_mocks.MockDripFileVowConverter{}
+		fetcher := &mocks.MockLogFetcher{}
+		fetcher.SetFetchedLogs([]types.Log{test_data.EthDripFileVowLog})
+		repository := &vow_mocks.MockDripFileVowRepository{}
+		fakeHeader := core.Header{BlockNumber: 1, Id: 2}
+		repository.SetMissingHeaders([]core.Header{fakeHeader})
+		transformer := vow.DripFileVowTransformer{
+			Fetcher:    fetcher,
+			Converter:  converter,
+			Repository: repository,
+		}
+
+		err := transformer.Execute()
+
+		Expect(err).NotTo(HaveOccurred())
+		Expect(repository.PassedHeaderID).To(Equal(fakeHeader.Id))
+		Expect(repository.PassedModel).To(Equal(test_data.DripFileVowModel))
+	})
+
+	It("returns error if repository returns error for create", func() {
+		converter := &vow_mocks.MockDripFileVowConverter{}
+		fetcher := &mocks.MockLogFetcher{}
+		fetcher.SetFetchedLogs([]types.Log{test_data.EthDripFileVowLog})
+		repository := &vow_mocks.MockDripFileVowRepository{}
+		repository.SetMissingHeaders([]core.Header{{BlockNumber: 1, Id: 2}})
+		repository.SetCreateError(fakes.FakeError)
+		transformer := vow.DripFileVowTransformer{
+			Fetcher:    fetcher,
+			Converter:  converter,
+			Repository: repository,
+		}
+
+		err := transformer.Execute()
+
+		Expect(err).To(HaveOccurred())
+		Expect(err).To(MatchError(fakes.FakeError))
+	})
+})

pkg/transformers/drip_file/vow/vow_suite_test.go

@@ -0,0 +1,27 @@
+// Copyright 2018 Vulcanize
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package vow_test
+
+import (
+	"testing"
+
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+)
+
+func TestVow(t *testing.T) {
+	RegisterFailHandler(Fail)
+	RunSpecs(t, "Vow Suite")
+}

pkg/transformers/pit_file/ilk/converter.go

@@ -17,9 +17,9 @@ package ilk
 import (
 	"bytes"
 	"encoding/json"
+	"errors"
 	"math/big"
 
-	"errors"
 	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/vulcanize/vulcanizedb/pkg/transformers/shared"
 )

pkg/transformers/pit_file/ilk/converter_test.go

@@ -15,11 +15,11 @@
 package ilk_test
 
 import (
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/core/types"
 	. "github.com/onsi/ginkgo"
 	. "github.com/onsi/gomega"
 
-	"github.com/ethereum/go-ethereum/common"
-	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/vulcanize/vulcanizedb/pkg/transformers/pit_file/ilk"
 	"github.com/vulcanize/vulcanizedb/pkg/transformers/test_data"
 )

pkg/transformers/pit_file/stability_fee/converter.go

@@ -17,8 +17,8 @@ package stability_fee
 import (
 	"bytes"
 	"encoding/json"
-
 	"errors"
+
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/core/types"
 )

pkg/transformers/pit_file/stability_fee/converter_test.go

@@ -15,10 +15,10 @@
 package stability_fee_test
 
 import (
+	"github.com/ethereum/go-ethereum/core/types"
 	. "github.com/onsi/ginkgo"
 	. "github.com/onsi/gomega"
 
-	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/vulcanize/vulcanizedb/pkg/transformers/pit_file/stability_fee"
 	"github.com/vulcanize/vulcanizedb/pkg/transformers/test_data"
 )

pkg/transformers/shared/constants.go

@@ -18,6 +18,7 @@ var (
 	DataItemLength = 32
 
 	CatABI        = "[{\"constant\":true,\"inputs\":[],\"name\":\"vat\",\"outputs\":[{\"name\":\"\",\"type\":\"address\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"vow\",\"outputs\":[{\"name\":\"\",\"type\":\"address\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"name\":\"\",\"type\":\"uint256\"}],\"name\":\"flips\",\"outputs\":[{\"name\":\"ilk\",\"type\":\"bytes32\"},{\"name\":\"lad\",\"type\":\"bytes32\"},{\"name\":\"ink\",\"type\":\"uint256\"},{\"name\":\"tab\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"nflip\",\"outputs\":[{\"name\":\"\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"live\",\"outputs\":[{\"name\":\"\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"name\":\"\",\"type\":\"address\"}],\"name\":\"wards\",\"outputs\":[{\"name\":\"\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"name\":\"\",\"type\":\"bytes32\"}],\"name\":\"ilks\",\"outputs\":[{\"name\":\"flip\",\"type\":\"address\"},{\"name\":\"chop\",\"type\":\"uint256\"},{\"name\":\"lump\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"pit\",\"outputs\":[{\"name\":\"\",\"type\":\"address\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"name\":\"vat_\",\"type\":\"address\"},{\"name\":\"pit_\",\"type\":\"address\"},{\"name\":\"vow_\",\"type\":\"address\"}],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"constructor\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"name\":\"ilk\",\"type\":\"bytes32\"},{\"indexed\":true,\"name\":\"lad\",\"type\":\"bytes32\"},{\"indexed\":false,\"name\":\"ink\",\"type\":\"uint256\"},{\"indexed\":false,\"name\":\"art\",\"type\":\"uint256\"},{\"indexed\":false,\"name\":\"tab\",\"type\":\"uint256\"},{\"indexed\":false,\"name\":\"flip\",\"type\":\"uint256\"},{\"indexed\":false,\"name\":\"iArt\",\"type\":\"uint256\"}],\"name\":\"Bite\",\"type\":\"event\"},{\"anonymous\":true,\"inputs\":[{\"indexed\":true,\"name\":\"sig\",\"type\":\"bytes4\"},{\"indexed\":true,\"name\":\"guy\",\"type\":\"address\"},{\"indexed\":true,\"name\":\"foo\",\"type\":\"bytes32\"},{\"indexed\":true,\"name\":\"bar\",\"type\":\"bytes32\"},{\"indexed\":false,\"name\":\"wad\",\"type\":\"uint256\"},{\"indexed\":false,\"name\":\"fax\",\"type\":\"bytes\"}],\"name\":\"LogNote\",\"type\":\"event\"},{\"constant\":false,\"inputs\":[{\"name\":\"guy\",\"type\":\"address\"}],\"name\":\"rely\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"name\":\"guy\",\"type\":\"address\"}],\"name\":\"deny\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"name\":\"ilk\",\"type\":\"bytes32\"},{\"name\":\"what\",\"type\":\"bytes32\"},{\"name\":\"data\",\"type\":\"uint256\"}],\"name\":\"file\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"name\":\"ilk\",\"type\":\"bytes32\"},{\"name\":\"what\",\"type\":\"bytes32\"},{\"name\":\"flip\",\"type\":\"address\"}],\"name\":\"file\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"name\":\"ilk\",\"type\":\"bytes32\"},{\"name\":\"lad\",\"type\":\"bytes32\"}],\"name\":\"bite\",\"outputs\":[{\"name\":\"\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"name\":\"n\",\"type\":\"uint256\"},{\"name\":\"wad\",\"type\":\"uint256\"}],\"name\":\"flip\",\"outputs\":[{\"name\":\"id\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"}]"
+	DripABI       = `[{"constant":true,"inputs":[],"name":"vat","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function","signature":"0x36569e77"},{"constant":true,"inputs":[],"name":"repo","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function","signature":"0x56ff3122"},{"constant":true,"inputs":[{"name":"","type":"address"}],"name":"wards","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function","signature":"0xbf353dbb"},{"constant":true,"inputs":[{"name":"","type":"bytes32"}],"name":"ilks","outputs":[{"name":"vow","type":"bytes32"},{"name":"tax","type":"uint256"},{"name":"rho","type":"uint48"}],"payable":false,"stateMutability":"view","type":"function","signature":"0xd9638d36"},{"inputs":[{"name":"vat_","type":"address"}],"payable":false,"stateMutability":"nonpayable","type":"constructor","signature":"constructor"},{"anonymous":true,"inputs":[{"indexed":true,"name":"sig","type":"bytes4"},{"indexed":true,"name":"guy","type":"address"},{"indexed":true,"name":"foo","type":"bytes32"},{"indexed":true,"name":"bar","type":"bytes32"},{"indexed":false,"name":"wad","type":"uint256"},{"indexed":false,"name":"fax","type":"bytes"}],"name":"LogNote","type":"event","signature":"0x644843f351d3fba4abcd60109eaff9f54bac8fb8ccf0bab941009c21df21cf31"},{"constant":false,"inputs":[{"name":"guy","type":"address"}],"name":"rely","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function","signature":"0x65fae35e"},{"constant":false,"inputs":[{"name":"guy","type":"address"}],"name":"deny","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function","signature":"0x9c52a7f1"},{"constant":true,"inputs":[],"name":"era","outputs":[{"name":"","type":"uint48"}],"payable":false,"stateMutability":"view","type":"function","signature":"0x143e55e0"},{"constant":false,"inputs":[{"name":"ilk","type":"bytes32"},{"name":"vow","type":"bytes32"},{"name":"tax","type":"uint256"}],"name":"file","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function","signature":"0x1a0b287e"},{"constant":false,"inputs":[{"name":"what","type":"bytes32"},{"name":"data","type":"uint256"}],"name":"file","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function","signature":"0x29ae8114"},{"constant":false,"inputs":[{"name":"ilk","type":"bytes32"}],"name":"drip","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function","signature":"0x44e2a5a8"}]`
 	FlipperABI    = `[{"constant":true,"inputs":[{"name":"","type":"uint256"}],"name":"bids","outputs":[{"name":"bid","type":"uint256"},{"name":"lot","type":"uint256"},{"name":"guy","type":"address"},{"name":"tic","type":"uint48"},{"name":"end","type":"uint48"},{"name":"urn","type":"bytes32"},{"name":"gal","type":"address"},{"name":"tab","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function","signature":"0x4423c5f1"},{"constant":true,"inputs":[],"name":"ttl","outputs":[{"name":"","type":"uint48"}],"payable":false,"stateMutability":"view","type":"function","signature":"0x4e8b1dd5"},{"constant":true,"inputs":[],"name":"gem","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function","signature":"0x7bd2bea7"},{"constant":true,"inputs":[],"name":"beg","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function","signature":"0x7d780d82"},{"constant":true,"inputs":[],"name":"tau","outputs":[{"name":"","type":"uint48"}],"payable":false,"stateMutability":"view","type":"function","signature":"0xcfc4af55"},{"constant":true,"inputs":[],"name":"kicks","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function","signature":"0xcfdd3302"},{"constant":true,"inputs":[],"name":"dai","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function","signature":"0xf4b9fa75"},{"inputs":[{"name":"dai_","type":"address"},{"name":"gem_","type":"address"}],"payable":false,"stateMutability":"nonpayable","type":"constructor","signature":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"name":"id","type":"uint256"},{"indexed":false,"name":"lot","type":"uint256"},{"indexed":false,"name":"bid","type":"uint256"},{"indexed":false,"name":"gal","type":"address"},{"indexed":false,"name":"end","type":"uint48"},{"indexed":true,"name":"urn","type":"bytes32"},{"indexed":false,"name":"tab","type":"uint256"}],"name":"Kick","type":"event","signature":"0xbac86238bdba81d21995024470425ecb370078fa62b7271b90cf28cbd1e3e87e"},{"anonymous":true,"inputs":[{"indexed":true,"name":"sig","type":"bytes4"},{"indexed":true,"name":"guy","type":"address"},{"indexed":true,"name":"foo","type":"bytes32"},{"indexed":true,"name":"bar","type":"bytes32"},{"indexed":false,"name":"wad","type":"uint256"},{"indexed":false,"name":"fax","type":"bytes"}],"name":"LogNote","type":"event","signature":"0x644843f351d3fba4abcd60109eaff9f54bac8fb8ccf0bab941009c21df21cf31"},{"constant":true,"inputs":[],"name":"era","outputs":[{"name":"","type":"uint48"}],"payable":false,"stateMutability":"view","type":"function","signature":"0x143e55e0"},{"constant":false,"inputs":[{"name":"urn","type":"bytes32"},{"name":"gal","type":"address"},{"name":"tab","type":"uint256"},{"name":"lot","type":"uint256"},{"name":"bid","type":"uint256"}],"name":"kick","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"nonpayable","type":"function","signature":"0xeae19d9e"},{"constant":false,"inputs":[{"name":"id","type":"uint256"}],"name":"tick","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function","signature":"0xfc7b6aee"},{"constant":false,"inputs":[{"name":"id","type":"uint256"},{"name":"lot","type":"uint256"},{"name":"bid","type":"uint256"}],"name":"tend","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function","signature":"0x4b43ed12"},{"constant":false,"inputs":[{"name":"id","type":"uint256"},{"name":"lot","type":"uint256"},{"name":"bid","type":"uint256"}],"name":"dent","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function","signature":"0x5ff3a382"},{"constant":false,"inputs":[{"name":"id","type":"uint256"}],"name":"deal","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function","signature":"0xc959c42b"}]`
 	MedianizerABI = `[{"constant":false,"inputs":[{"name":"owner_","type":"address"}],"name":"setOwner","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"","type":"bytes32"}],"name":"poke","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[],"name":"poke","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"compute","outputs":[{"name":"","type":"bytes32"},{"name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"wat","type":"address"}],"name":"set","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"wat","type":"address"}],"name":"unset","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"","type":"address"}],"name":"indexes","outputs":[{"name":"","type":"bytes12"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"next","outputs":[{"name":"","type":"bytes12"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"read","outputs":[{"name":"","type":"bytes32"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"peek","outputs":[{"name":"","type":"bytes32"},{"name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"name":"","type":"bytes12"}],"name":"values","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"min_","type":"uint96"}],"name":"setMin","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"authority_","type":"address"}],"name":"setAuthority","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"owner","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[],"name":"void","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"pos","type":"bytes12"},{"name":"wat","type":"address"}],"name":"set","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"authority","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"pos","type":"bytes12"}],"name":"unset","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"next_","type":"bytes12"}],"name":"setNext","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"min","outputs":[{"name":"","type":"uint96"}],"payable":false,"stateMutability":"view","type":"function"},{"anonymous":false,"inputs":[{"indexed":false,"name":"val","type":"bytes32"}],"name":"LogValue","type":"event"},{"anonymous":true,"inputs":[{"indexed":true,"name":"sig","type":"bytes4"},{"indexed":true,"name":"guy","type":"address"},{"indexed":true,"name":"foo","type":"bytes32"},{"indexed":true,"name":"bar","type":"bytes32"},{"indexed":false,"name":"wad","type":"uint256"},{"indexed":false,"name":"fax","type":"bytes"}],"name":"LogNote","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"authority","type":"address"}],"name":"LogSetAuthority","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"owner","type":"address"}],"name":"LogSetOwner","type":"event"}]]`
 	PitABI        = `[{"constant":true,"inputs":[],"name":"vat","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function","signature":"0x36569e77"},{"constant":true,"inputs":[],"name":"live","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function","signature":"0x957aa58c"},{"constant":true,"inputs":[],"name":"drip","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function","signature":"0x9f678cca"},{"constant":true,"inputs":[],"name":"Line","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function","signature":"0xbabe8a3f"},{"constant":true,"inputs":[{"name":"","type":"address"}],"name":"wards","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function","signature":"0xbf353dbb"},{"constant":true,"inputs":[{"name":"","type":"bytes32"}],"name":"ilks","outputs":[{"name":"spot","type":"uint256"},{"name":"line","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function","signature":"0xd9638d36"},{"inputs":[{"name":"vat_","type":"address"}],"payable":false,"stateMutability":"nonpayable","type":"constructor","signature":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"name":"ilk","type":"bytes32"},{"indexed":true,"name":"urn","type":"bytes32"},{"indexed":false,"name":"ink","type":"uint256"},{"indexed":false,"name":"art","type":"uint256"},{"indexed":false,"name":"dink","type":"int256"},{"indexed":false,"name":"dart","type":"int256"},{"indexed":false,"name":"iArt","type":"uint256"}],"name":"Frob","type":"event","signature":"0xb2afa28318bcc689926b52835d844de174ef8de97e982a85c0199d584920791b"},{"anonymous":true,"inputs":[{"indexed":true,"name":"sig","type":"bytes4"},{"indexed":true,"name":"guy","type":"address"},{"indexed":true,"name":"foo","type":"bytes32"},{"indexed":true,"name":"bar","type":"bytes32"},{"indexed":false,"name":"wad","type":"uint256"},{"indexed":false,"name":"fax","type":"bytes"}],"name":"LogNote","type":"event","signature":"0x644843f351d3fba4abcd60109eaff9f54bac8fb8ccf0bab941009c21df21cf31"},{"constant":false,"inputs":[{"name":"guy","type":"address"}],"name":"rely","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function","signature":"0x65fae35e"},{"constant":false,"inputs":[{"name":"guy","type":"address"}],"name":"deny","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function","signature":"0x9c52a7f1"},{"constant":false,"inputs":[{"name":"ilk","type":"bytes32"},{"name":"what","type":"bytes32"},{"name":"data","type":"uint256"}],"name":"file","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function","signature":"0x1a0b287e"},{"constant":false,"inputs":[{"name":"what","type":"bytes32"},{"name":"data","type":"uint256"}],"name":"file","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function","signature":"0x29ae8114"},{"constant":false,"inputs":[{"name":"what","type":"bytes32"},{"name":"data","type":"address"}],"name":"file","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function","signature":"0xd4e8be83"},{"constant":false,"inputs":[{"name":"ilk","type":"bytes32"},{"name":"dink","type":"int256"},{"name":"dart","type":"int256"}],"name":"frob","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function","signature":"0x5a984ded"}]`
@@ -25,6 +26,7 @@ var (
 
 	// temporary addresses from local Ganache deployment
 	CatContractAddress     = "0xe0f0fa6982c59d8aa4ae0134bfe048327bd788cacf758b643ca41f055ffce76c"
+	DripContractAddress    = "0xD4ae7420FCF54ab7cd27ab9c24DCC876eF6b64C3"
 	FlipperContractAddress = "0x6b59c42097e2fff7cad96cb08ceefd601081ad9c"
 	PepContractAddress     = "0x99041F808D598B782D5a3e498681C2452A31da08"
 	PipContractAddress     = "0x729D19f657BD0614b4985Cf1D82531c67569197B"
@@ -32,11 +34,14 @@ var (
 	RepContractAddress     = "0xF5f94b7F9De14D43112e713835BCef2d55b76c1C"
 	VatContractAddress     = "0x239E6f0AB02713f1F8AA90ebeDeD9FC66Dc96CD6"
 
+	//TODO: get pit and drip file method signatures directly from the ABI
 	biteMethod                = GetSolidityMethodSignature(CatABI, "Bite")
 	dentMethod                = GetSolidityMethodSignature(FlipperABI, "dent")
+	dripFileIlkMethod         = "file(bytes32,bytes32,uint256)"
+	dripFileRepoMethod        = GetSolidityMethodSignature(DripABI, "file")
+	dripFileVowMethod         = "file(bytes32,bytes32)"
 	flipKickMethod            = GetSolidityMethodSignature(FlipperABI, "Kick")
 	frobMethod                = GetSolidityMethodSignature(PitABI, "Frob")
-	//TODO: get these pit file method signatures directly from the ABI
 	pitFileDebtCeilingMethod  = "file(bytes32,uint256)"
 	pitFileIlkMethod          = "file(bytes32,bytes32,uint256)"
 	pitFileStabilityFeeMethod = GetSolidityMethodSignature(PitABI, "file")
@@ -46,6 +51,9 @@ var (
 
 	BiteSignature                = GetEventSignature(biteMethod)
 	DentFunctionSignature        = GetLogNoteSignature(dentMethod)
+	DripFileIlkSignature         = GetLogNoteSignature(dripFileIlkMethod)
+	DripFileRepoSignature        = GetLogNoteSignature(dripFileRepoMethod)
+	DripFileVowSignature         = GetLogNoteSignature(dripFileVowMethod)
 	FlipKickSignature            = GetEventSignature(flipKickMethod)
 	FrobSignature                = GetEventSignature(frobMethod)
 	LogValueSignature            = GetEventSignature(logValueMethod)

pkg/transformers/shared/event_signature_generator.go

@@ -15,11 +15,13 @@
 package shared
 
 import (
-	"github.com/ethereum/go-ethereum/crypto"
-	"github.com/vulcanize/vulcanizedb/pkg/geth"
-	"github.com/ethereum/go-ethereum/accounts/abi"
 	"fmt"
 	"strings"
+
+	"github.com/ethereum/go-ethereum/accounts/abi"
+	"github.com/ethereum/go-ethereum/crypto"
+
+	"github.com/vulcanize/vulcanizedb/pkg/geth"
 )
 
 func GetEventSignature(solidityMethodSignature string) string {

pkg/transformers/tend/converter.go

@@ -21,14 +21,13 @@ import (
 
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/core/types"
-
 )
 
 type Converter interface {
 	Convert(contractAddress string, contractAbi string, ethLog types.Log) (TendModel, error)
 }
 
-type TendConverter struct {}
+type TendConverter struct{}
 
 func NewTendConverter() TendConverter {
 	return TendConverter{}

pkg/transformers/test_data/drip_file.go

@@ -0,0 +1,103 @@
+// Copyright 2018 Vulcanize
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package test_data
+
+import (
+	"encoding/json"
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/common/hexutil"
+	"github.com/ethereum/go-ethereum/core/types"
+	ilk2 "github.com/vulcanize/vulcanizedb/pkg/transformers/drip_file/ilk"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/drip_file/repo"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/drip_file/vow"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/shared"
+	"math/big"
+)
+
+var EthDripFileIlkLog = types.Log{
+	Address: common.HexToAddress(shared.DripContractAddress),
+	Topics: []common.Hash{
+		common.HexToHash("0x1a0b287e00000000000000000000000000000000000000000000000000000000"),
+		common.HexToHash("0x00000000000000000000000064d922894153be9eef7b7218dc565d1d0ce2a092"),
+		common.HexToHash("0x66616b6520696c6b000000000000000000000000000000000000000000000000"),
+		common.HexToHash("0x66616b6520766f77000000000000000000000000000000000000000000000000"),
+	},
+	Data:        hexutil.MustDecode("0x0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000000000000000000000000000641a0b287e66616b6520696c6b00000000000000000000000000000000000000000000000066616b6520766f77000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000007b"),
+	BlockNumber: 35,
+	TxHash:      common.HexToHash("0xa1c31b7e6389470902237161263558615e60b40f2e63060b2f4aeafe92d57e5f"),
+	TxIndex:     12,
+	BlockHash:   common.HexToHash("0x0188f3ee3cc05aa72457fa328e6a461de31e4cbd429fc37f9a52da4e9773c0b4"),
+	Index:       0,
+	Removed:     false,
+}
+
+var rawDripFileIlkLog, _ = json.Marshal(EthDripFileIlkLog)
+var DripFileIlkModel = ilk2.DripFileIlkModel{
+	Ilk:              "fake ilk",
+	Vow:              "fake vow",
+	Tax:              big.NewInt(123).String(),
+	TransactionIndex: EthDripFileIlkLog.TxIndex,
+	Raw:              rawDripFileIlkLog,
+}
+
+var EthDripFileRepoLog = types.Log{
+	Address: common.HexToAddress(shared.DripContractAddress),
+	Topics: []common.Hash{
+		common.HexToHash("0x29ae811400000000000000000000000000000000000000000000000000000000"),
+		common.HexToHash("0x00000000000000000000000064d922894153be9eef7b7218dc565d1d0ce2a092"),
+		common.HexToHash("0x66616b6520776861740000000000000000000000000000000000000000000000"),
+		common.HexToHash("0x000000000000000000000000000000000000000000000000000000000000007b"),
+	},
+	Data:        hexutil.MustDecode("0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000040000000000000000000000000000000000000000000000000000000000000004429ae811466616b6520776861740000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000007b"),
+	BlockNumber: 36,
+	TxHash:      common.HexToHash("0xeeaa16de1d91c239b66773e8c2116a26cfeaaf5d962b31466c9bf047a5caa20f"),
+	TxIndex:     13,
+	BlockHash:   common.HexToHash("0x89de4145ea8e34dfd9db9a7ea34f5be6f1f402e812fd389acca342513b353288"),
+	Index:       0,
+	Removed:     false,
+}
+
+var rawDripFileRepoLog, _ = json.Marshal(EthDripFileRepoLog)
+var DripFileRepoModel = repo.DripFileRepoModel{
+	What:             "fake what",
+	Data:             big.NewInt(123).String(),
+	TransactionIndex: EthDripFileRepoLog.TxIndex,
+	Raw:              rawDripFileRepoLog,
+}
+
+var EthDripFileVowLog = types.Log{
+	Address: common.HexToAddress(shared.DripContractAddress),
+	Topics: []common.Hash{
+		common.HexToHash("0xe9b674b900000000000000000000000000000000000000000000000000000000"),
+		common.HexToHash("0x00000000000000000000000064d922894153be9eef7b7218dc565d1d0ce2a092"),
+		common.HexToHash("0x66616b6520776861740000000000000000000000000000000000000000000000"),
+		common.HexToHash("0x66616b6520646174610000000000000000000000000000000000000000000000"),
+	},
+	Data:        hexutil.MustDecode("0x000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000044e9b674b966616b652077686174000000000000000000000000000000000000000000000066616b6520646174610000000000000000000000000000000000000000000000"),
+	BlockNumber: 51,
+	TxHash:      common.HexToHash("0x586e26b71b41fcd6905044dbe8f0cca300517542278f74a9b925c4f800fed85c"),
+	TxIndex:     14,
+	BlockHash:   common.HexToHash("0xbec69b1e93503679c9c006819477b86fe16aaff3a418da1e916c431b68be5522"),
+	Index:       0,
+	Removed:     false,
+}
+
+var rawDripFileVowLog, _ = json.Marshal(EthDripFileVowLog)
+var DripFileVowModel = vow.DripFileVowModel{
+	What:             "fake what",
+	Data:             "fake data",
+	TransactionIndex: EthDripFileVowLog.TxIndex,
+	Raw:              rawDripFileVowLog,
+}

pkg/transformers/test_data/mocks/drip_file/ilk/converter.go

@@ -0,0 +1,35 @@
+// Copyright 2018 Vulcanize
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package ilk
+
+import (
+	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/drip_file/ilk"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/test_data"
+)
+
+type MockDripFileIlkConverter struct {
+	converterErr error
+	PassedLog    types.Log
+}
+
+func (converter *MockDripFileIlkConverter) ToModel(ethLog types.Log) (ilk.DripFileIlkModel, error) {
+	converter.PassedLog = ethLog
+	return test_data.DripFileIlkModel, converter.converterErr
+}
+
+func (converter *MockDripFileIlkConverter) SetConverterError(e error) {
+	converter.converterErr = e
+}

pkg/transformers/test_data/mocks/drip_file/ilk/repository.go

@@ -0,0 +1,54 @@
+// Copyright 2018 Vulcanize
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package ilk
+
+import (
+	"github.com/vulcanize/vulcanizedb/pkg/core"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/drip_file/ilk"
+)
+
+type MockDripFileIlkRepository struct {
+	createErr                 error
+	missingHeaders            []core.Header
+	missingHeadersErr         error
+	PassedStartingBlockNumber int64
+	PassedEndingBlockNumber   int64
+	PassedHeaderID            int64
+	PassedModel               ilk.DripFileIlkModel
+}
+
+func (repository *MockDripFileIlkRepository) Create(headerID int64, model ilk.DripFileIlkModel) error {
+	repository.PassedHeaderID = headerID
+	repository.PassedModel = model
+	return repository.createErr
+}
+
+func (repository *MockDripFileIlkRepository) MissingHeaders(startingBlockNumber, endingBlockNumber int64) ([]core.Header, error) {
+	repository.PassedStartingBlockNumber = startingBlockNumber
+	repository.PassedEndingBlockNumber = endingBlockNumber
+	return repository.missingHeaders, repository.missingHeadersErr
+}
+
+func (repository *MockDripFileIlkRepository) SetMissingHeadersErr(e error) {
+	repository.missingHeadersErr = e
+}
+
+func (repository *MockDripFileIlkRepository) SetMissingHeaders(headers []core.Header) {
+	repository.missingHeaders = headers
+}
+
+func (repository *MockDripFileIlkRepository) SetCreateError(e error) {
+	repository.createErr = e
+}

pkg/transformers/test_data/mocks/drip_file/repo/converter.go

@@ -0,0 +1,35 @@
+// Copyright 2018 Vulcanize
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package repo
+
+import (
+	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/drip_file/repo"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/test_data"
+)
+
+type MockDripFileRepoConverter struct {
+	converterErr error
+	PassedLog    types.Log
+}
+
+func (converter *MockDripFileRepoConverter) ToModel(ethLog types.Log) (repo.DripFileRepoModel, error) {
+	converter.PassedLog = ethLog
+	return test_data.DripFileRepoModel, converter.converterErr
+}
+
+func (converter *MockDripFileRepoConverter) SetConverterError(e error) {
+	converter.converterErr = e
+}

pkg/transformers/test_data/mocks/drip_file/repo/repository.go

@@ -0,0 +1,54 @@
+// Copyright 2018 Vulcanize
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package repo
+
+import (
+	"github.com/vulcanize/vulcanizedb/pkg/core"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/drip_file/repo"
+)
+
+type MockDripFileRepoRepository struct {
+	createErr                 error
+	missingHeaders            []core.Header
+	missingHeadersErr         error
+	PassedStartingBlockNumber int64
+	PassedEndingBlockNumber   int64
+	PassedHeaderID            int64
+	PassedModel               repo.DripFileRepoModel
+}
+
+func (repository *MockDripFileRepoRepository) Create(headerID int64, model repo.DripFileRepoModel) error {
+	repository.PassedHeaderID = headerID
+	repository.PassedModel = model
+	return repository.createErr
+}
+
+func (repository *MockDripFileRepoRepository) MissingHeaders(startingBlockNumber, endingBlockNumber int64) ([]core.Header, error) {
+	repository.PassedStartingBlockNumber = startingBlockNumber
+	repository.PassedEndingBlockNumber = endingBlockNumber
+	return repository.missingHeaders, repository.missingHeadersErr
+}
+
+func (repository *MockDripFileRepoRepository) SetMissingHeadersErr(e error) {
+	repository.missingHeadersErr = e
+}
+
+func (repository *MockDripFileRepoRepository) SetMissingHeaders(headers []core.Header) {
+	repository.missingHeaders = headers
+}
+
+func (repository *MockDripFileRepoRepository) SetCreateError(e error) {
+	repository.createErr = e
+}

pkg/transformers/test_data/mocks/drip_file/vow/converter.go

@@ -0,0 +1,35 @@
+// Copyright 2018 Vulcanize
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package vow
+
+import (
+	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/drip_file/vow"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/test_data"
+)
+
+type MockDripFileVowConverter struct {
+	converterErr error
+	PassedLog    types.Log
+}
+
+func (converter *MockDripFileVowConverter) ToModel(ethLog types.Log) (vow.DripFileVowModel, error) {
+	converter.PassedLog = ethLog
+	return test_data.DripFileVowModel, converter.converterErr
+}
+
+func (converter *MockDripFileVowConverter) SetConverterError(e error) {
+	converter.converterErr = e
+}

pkg/transformers/test_data/mocks/drip_file/vow/repository.go

@@ -0,0 +1,54 @@
+// Copyright 2018 Vulcanize
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package vow
+
+import (
+	"github.com/vulcanize/vulcanizedb/pkg/core"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/drip_file/vow"
+)
+
+type MockDripFileVowRepository struct {
+	createErr                 error
+	missingHeaders            []core.Header
+	missingHeadersErr         error
+	PassedStartingBlockNumber int64
+	PassedEndingBlockNumber   int64
+	PassedHeaderID            int64
+	PassedModel               vow.DripFileVowModel
+}
+
+func (repository *MockDripFileVowRepository) Create(headerID int64, model vow.DripFileVowModel) error {
+	repository.PassedHeaderID = headerID
+	repository.PassedModel = model
+	return repository.createErr
+}
+
+func (repository *MockDripFileVowRepository) MissingHeaders(startingBlockNumber, endingBlockNumber int64) ([]core.Header, error) {
+	repository.PassedStartingBlockNumber = startingBlockNumber
+	repository.PassedEndingBlockNumber = endingBlockNumber
+	return repository.missingHeaders, repository.missingHeadersErr
+}
+
+func (repository *MockDripFileVowRepository) SetMissingHeadersErr(e error) {
+	repository.missingHeadersErr = e
+}
+
+func (repository *MockDripFileVowRepository) SetMissingHeaders(headers []core.Header) {
+	repository.missingHeaders = headers
+}
+
+func (repository *MockDripFileVowRepository) SetCreateError(e error) {
+	repository.createErr = e
+}

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

@@ -0,0 +1,37 @@
+// Copyright 2018 Vulcanize
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package price_feeds
+
+import (
+	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/price_feeds"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/test_data"
+)
+
+type MockPriceFeedConverter struct {
+	converterErr   error
+	PassedLog      types.Log
+	PassedHeaderID int64
+}
+
+func (converter *MockPriceFeedConverter) ToModel(log types.Log, headerID int64) (price_feeds.PriceFeedModel, error) {
+	converter.PassedLog = log
+	converter.PassedHeaderID = headerID
+	return test_data.PriceFeedModel, converter.converterErr
+}
+
+func (converter *MockPriceFeedConverter) SetConverterErr(e error) {
+	converter.converterErr = e
+}

pkg/transformers/test_data/price_feed.go

@@ -0,0 +1,50 @@
+// Copyright 2018 Vulcanize
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package test_data
+
+import (
+	"encoding/json"
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/price_feeds"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/shared"
+)
+
+var (
+	medianizerAddress = common.HexToAddress("0x99041f808d598b782d5a3e498681c2452a31da08")
+	blockNumber       = uint64(6147230)
+	txIndex           = uint(119)
+)
+
+// https://etherscan.io/tx/0xa51a50a2adbfba4e2ab3d72dfd67a21c769f1bc8d2b180663a15500a56cde58f
+var EthPriceFeedLog = types.Log{
+	Address:     medianizerAddress,
+	Topics:      []common.Hash{common.HexToHash(shared.LogValueSignature)},
+	Data:        common.FromHex("00000000000000000000000000000000000000000000001486f658319fb0c100"),
+	BlockNumber: blockNumber,
+	TxHash:      common.HexToHash("0xa51a50a2adbfba4e2ab3d72dfd67a21c769f1bc8d2b180663a15500a56cde58f"),
+	TxIndex:     txIndex,
+	BlockHash:   common.HexToHash("0x27ecebbf69eefa3bb3cf65f472322a80ff4946653a50a2171dc605f49829467d"),
+	Index:       0,
+	Removed:     false,
+}
+
+var rawPriceFeedLog, _ = json.Marshal(EthPriceFeedLog)
+var PriceFeedModel = price_feeds.PriceFeedModel{
+	BlockNumber:       blockNumber,
+	MedianizerAddress: EthPriceFeedLog.Address[:],
+	UsdValue:          "378.6599388897",
+	TransactionIndex:  EthPriceFeedLog.TxIndex,
+}

pkg/transformers/transformers.go

@@ -17,6 +17,9 @@ package transformers
 import (
 	"github.com/vulcanize/vulcanizedb/pkg/transformers/bite"
 	"github.com/vulcanize/vulcanizedb/pkg/transformers/dent"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/drip_file"
+	ilk2 "github.com/vulcanize/vulcanizedb/pkg/transformers/drip_file/ilk"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/drip_file/repo"
 	"github.com/vulcanize/vulcanizedb/pkg/transformers/flip_kick"
 	"github.com/vulcanize/vulcanizedb/pkg/transformers/frob"
 	"github.com/vulcanize/vulcanizedb/pkg/transformers/pit_file"
@@ -34,6 +37,9 @@ func TransformerInitializers() []shared.TransformerInitializer {
 	dentTransformerInitializer := dent.DentTransformerInitializer{Config: dent.DentConfig}
 	flipKickTransformerInitializer := flip_kick.FlipKickTransformerInitializer{Config: flip_kick.FlipKickConfig}
 	frobTransformerInitializer := frob.FrobTransformerInitializer{Config: frob.FrobConfig}
+	dripFileConfig := drip_file.DripFileConfig
+	dripFileIlkTransformerInitializer := ilk2.DripFileIlkTransformerInitializer{Config: dripFileConfig}
+	dripFileRepoTransformerInitializer := repo.DripFileRepoTransformerInitializer{Config: dripFileConfig}
 	pitFileConfig := pit_file.PitFileConfig
 	pitFileDebtCeilingTransformerInitializer := debt_ceiling.PitFileDebtCeilingTransformerInitializer{Config: pitFileConfig}
 	pitFileIlkTransformerInitializer := ilk.PitFileIlkTransformerInitializer{Config: pitFileConfig}
@@ -46,6 +52,8 @@ func TransformerInitializers() []shared.TransformerInitializer {
 	return []shared.TransformerInitializer{
 		biteTransformerInitializer.NewBiteTransformer,
 		dentTransformerInitializer.NewDentTransformer,
+		dripFileIlkTransformerInitializer.NewDripFileIlkTransformer,
+		dripFileRepoTransformerInitializer.NewDripFileRepoTransformer,
 		flipKickTransformerInitializer.NewFlipKickTransformer,
 		frobTransformerInitializer.NewFrobTransformer,
 		pitFileDebtCeilingTransformerInitializer.NewPitFileDebtCeilingTransformer,

test_config/test_config.go

@@ -77,6 +77,11 @@ func CleanTestDB(db *postgres.DB) {
 	db.MustExec("DELETE FROM headers")
 	db.MustExec("DELETE FROM log_filters")
 	db.MustExec("DELETE FROM logs")
+	db.MustExec("DELETE FROM maker.bite")
+	db.MustExec("DELETE FROM maker.drip_file_ilk")
+	db.MustExec("DELETE FROM maker.drip_file_repo")
+	db.MustExec("DELETE FROM maker.drip_file_vow")
+	db.MustExec("DELETE FROM maker.pit_file_debt_ceiling")
 	db.MustExec("DELETE FROM maker.pit_file_ilk")
 	db.MustExec("DELETE FROM maker.pit_file_stability_fee")
 	db.MustExec("DELETE FROM receipts")