Add Vat slip transformer

cmd/continuousLogSync.go

@@ -109,6 +109,7 @@ func buildTransformerInitializerMap() map[string]shared2.TransformerInitializer
 	transformerInitializerMap["vatMove"] = transformers.VatMoveTransformerInitializer
 	transformerInitializerMap["vatHeal"] = transformers.VatHealTransformerInitializer
 	transformerInitializerMap["vatFold"] = transformers.VatFoldTransformerInitializer
+	transformerInitializerMap["vatSlip"] = transformers.VatSlipTransformerInitializer
 	transformerInitializerMap["vatToll"] = transformers.VatTollTransformerInitializer
 	transformerInitializerMap["vatTune"] = transformers.VatTuneTransformerInitializer
 	transformerInitializerMap["vatFlux"] = transformers.VatFluxTransformerInitializer

cmd/getSignatures.go

@@ -53,7 +53,9 @@ func init() {
 	signatures["VatHealSignature"] = shared.VatHealSignature
 	signatures["VatGrabSignature"] = shared.VatGrabSignature
 	signatures["VatInitSignature"] = shared.VatInitSignature
+	signatures["VatFluxSignature"] = shared.VatFluxSignature
 	signatures["VatFoldSignature"] = shared.VatFoldSignature
+	signatures["VatSlipSignature"] = shared.VatSlipSignature
 	signatures["VatTollSignature"] = shared.VatTollSignature
 	signatures["VatTuneSignature"] = shared.VatTuneSignature
 

db/migrations/1539638109_create_vat_slip.down.sql

@@ -0,0 +1,3 @@
+DROP TABLE maker.vat_slip;
+ALTER TABLE public.checked_headers
+  DROP COLUMN vat_slip_checked;

db/migrations/1539638109_create_vat_slip.up.sql

@@ -0,0 +1,13 @@
+CREATE TABLE maker.vat_slip (
+  id            SERIAL PRIMARY KEY,
+  header_id     INTEGER NOT NULL REFERENCES headers (id) ON DELETE CASCADE,
+  ilk           TEXT,
+  guy           TEXT,
+  rad           NUMERIC,
+  tx_idx        INTEGER NOT NULL,
+  raw_log       JSONB,
+  UNIQUE (header_id, tx_idx)
+);
+
+ALTER TABLE public.checked_headers
+  ADD COLUMN vat_slip_checked BOOLEAN NOT NULL DEFAULT FALSE;

db/schema.sql

@@ -909,6 +909,41 @@ CREATE SEQUENCE maker.vat_move_id_seq
 ALTER SEQUENCE maker.vat_move_id_seq OWNED BY maker.vat_move.id;
 
 
+--
+-- Name: vat_slip; Type: TABLE; Schema: maker; Owner: -
+--
+
+CREATE TABLE maker.vat_slip (
+    id integer NOT NULL,
+    header_id integer NOT NULL,
+    ilk text,
+    guy text,
+    rad numeric,
+    tx_idx integer NOT NULL,
+    raw_log jsonb
+);
+
+
+--
+-- Name: vat_slip_id_seq; Type: SEQUENCE; Schema: maker; Owner: -
+--
+
+CREATE SEQUENCE maker.vat_slip_id_seq
+    AS integer
+    START WITH 1
+    INCREMENT BY 1
+    NO MINVALUE
+    NO MAXVALUE
+    CACHE 1;
+
+
+--
+-- Name: vat_slip_id_seq; Type: SEQUENCE OWNED BY; Schema: maker; Owner: -
+--
+
+ALTER SEQUENCE maker.vat_slip_id_seq OWNED BY maker.vat_slip.id;
+
+
 --
 -- Name: vat_toll; Type: TABLE; Schema: maker; Owner: -
 --
@@ -1089,7 +1124,8 @@ CREATE TABLE public.checked_headers (
     vat_toll_checked boolean DEFAULT false NOT NULL,
     vat_tune_checked boolean DEFAULT false NOT NULL,
     vat_grab_checked boolean DEFAULT false NOT NULL,
-    vat_flux_checked boolean DEFAULT false NOT NULL
+    vat_flux_checked boolean DEFAULT false NOT NULL,
+    vat_slip_checked boolean DEFAULT false NOT NULL
 );
 
 
@@ -1579,6 +1615,13 @@ ALTER TABLE ONLY maker.vat_init ALTER COLUMN id SET DEFAULT nextval('maker.vat_i
 ALTER TABLE ONLY maker.vat_move ALTER COLUMN id SET DEFAULT nextval('maker.vat_move_id_seq'::regclass);
 
 
+--
+-- Name: vat_slip id; Type: DEFAULT; Schema: maker; Owner: -
+--
+
+ALTER TABLE ONLY maker.vat_slip ALTER COLUMN id SET DEFAULT nextval('maker.vat_slip_id_seq'::regclass);
+
+
 --
 -- Name: vat_toll id; Type: DEFAULT; Schema: maker; Owner: -
 --
@@ -2047,6 +2090,22 @@ ALTER TABLE ONLY maker.vat_move
     ADD CONSTRAINT vat_move_pkey PRIMARY KEY (id);
 
 
+--
+-- Name: vat_slip vat_slip_header_id_tx_idx_key; Type: CONSTRAINT; Schema: maker; Owner: -
+--
+
+ALTER TABLE ONLY maker.vat_slip
+    ADD CONSTRAINT vat_slip_header_id_tx_idx_key UNIQUE (header_id, tx_idx);
+
+
+--
+-- Name: vat_slip vat_slip_pkey; Type: CONSTRAINT; Schema: maker; Owner: -
+--
+
+ALTER TABLE ONLY maker.vat_slip
+    ADD CONSTRAINT vat_slip_pkey PRIMARY KEY (id);
+
+
 --
 -- Name: vat_toll vat_toll_header_id_tx_idx_key; Type: CONSTRAINT; Schema: maker; Owner: -
 --
@@ -2425,6 +2484,14 @@ ALTER TABLE ONLY maker.vat_move
     ADD CONSTRAINT vat_move_header_id_fkey FOREIGN KEY (header_id) REFERENCES public.headers(id) ON DELETE CASCADE;
 
 
+--
+-- Name: vat_slip vat_slip_header_id_fkey; Type: FK CONSTRAINT; Schema: maker; Owner: -
+--
+
+ALTER TABLE ONLY maker.vat_slip
+    ADD CONSTRAINT vat_slip_header_id_fkey FOREIGN KEY (header_id) REFERENCES public.headers(id) ON DELETE CASCADE;
+
+
 --
 -- Name: vat_toll vat_toll_header_id_fkey; Type: FK CONSTRAINT; Schema: maker; Owner: -
 --

pkg/transformers/integration_tests/frob.go

@@ -34,7 +34,6 @@ var _ = Describe("Frob Transformer", func() {
 		config.StartingBlockNumber = blockNumber
 		config.EndingBlockNumber = blockNumber
 
-		ipc := "https://kovan.infura.io/J5Vd2fRtGsw0zZ0Ov3BL"
 		rpcClient, ethClient, err := getClients(ipc)
 		Expect(err).NotTo(HaveOccurred())
 		blockchain, err := getBlockChain(rpcClient, ethClient)

pkg/transformers/integration_tests/helpers.go

@@ -15,19 +15,16 @@
 package integration_tests
 
 import (
-	"context"
-	"encoding/json"
-	"github.com/ethereum/go-ethereum/common/hexutil"
 	"github.com/ethereum/go-ethereum/ethclient"
 	"github.com/ethereum/go-ethereum/rpc"
 	"github.com/vulcanize/vulcanizedb/pkg/core"
 	"github.com/vulcanize/vulcanizedb/pkg/datastore/postgres"
 	"github.com/vulcanize/vulcanizedb/pkg/datastore/postgres/repositories"
+	"github.com/vulcanize/vulcanizedb/pkg/fakes"
 	"github.com/vulcanize/vulcanizedb/pkg/geth"
 	"github.com/vulcanize/vulcanizedb/pkg/geth/client"
 	rpc2 "github.com/vulcanize/vulcanizedb/pkg/geth/converters/rpc"
 	"github.com/vulcanize/vulcanizedb/pkg/geth/node"
-	"math/big"
 )
 
 func getClients(ipc string) (client.RpcClient, *ethclient.Client, error) {
@@ -46,22 +43,7 @@ func getBlockChain(rpcClient client.RpcClient, ethClient *ethclient.Client) (cor
 }
 
 func persistHeader(rpcClient client.RpcClient, db *postgres.DB, blockNumber int64) error {
-	var poaHeader core.POAHeader
-	blockNumberArg := hexutil.EncodeBig(big.NewInt(int64(blockNumber)))
-	err := rpcClient.CallContext(context.Background(), &poaHeader, "eth_getBlockByNumber", blockNumberArg, false)
-	if err != nil {
-		return err
-	}
-	rawHeader, err := json.Marshal(poaHeader)
-	if err != nil {
-		return err
-	}
 	headerRepository := repositories.NewHeaderRepository(db)
-	_, err = headerRepository.CreateOrUpdateHeader(core.Header{
+	_, err := headerRepository.CreateOrUpdateHeader(fakes.GetFakeHeader(blockNumber))
-		BlockNumber: poaHeader.Number.ToInt().Int64(),
-		Hash:        poaHeader.Hash.String(),
-		Raw:         rawHeader,
-		Timestamp:   poaHeader.Time.ToInt().String(),
-	})
 	return err
 }

pkg/transformers/integration_tests/integration_tests_suite_test.go

@@ -1,13 +1,30 @@
 package integration_tests
 
 import (
+	"log"
 	"testing"
 
 	. "github.com/onsi/ginkgo"
 	. "github.com/onsi/gomega"
+	"github.com/spf13/viper"
+	"io/ioutil"
 )
 
+var ipc string
+
 func TestIntegrationTests(t *testing.T) {
 	RegisterFailHandler(Fail)
 	RunSpecs(t, "IntegrationTests Suite")
 }
+
+var _ = BeforeSuite(func() {
+	testConfig := viper.New()
+	testConfig.SetConfigName("staging")
+	testConfig.AddConfigPath("$GOPATH/src/github.com/vulcanize/vulcanizedb/environments/")
+	err := testConfig.ReadInConfig()
+	ipc = testConfig.GetString("client.ipcPath")
+	if err != nil {
+		log.Fatal(err)
+	}
+	log.SetOutput(ioutil.Discard)
+})

pkg/transformers/integration_tests/price_feeds.go

@@ -33,7 +33,6 @@ var _ = Describe("Price feeds transformer", func() {
 	)
 
 	BeforeEach(func() {
-		ipc := "https://kovan.infura.io/J5Vd2fRtGsw0zZ0Ov3BL"
 		rpcClient, ethClient, err := getClients(ipc)
 		Expect(err).NotTo(HaveOccurred())
 		blockChain, err = getBlockChain(rpcClient, ethClient)

pkg/transformers/integration_tests/vat_grab.go

@@ -31,7 +31,6 @@ var _ = Describe("Vat Grab Transformer", func() {
 		config.StartingBlockNumber = blockNumber
 		config.EndingBlockNumber = blockNumber
 
-		ipc := "https://kovan.infura.io/J5Vd2fRtGsw0zZ0Ov3BL"
 		rpcClient, ethClient, err := getClients(ipc)
 		Expect(err).NotTo(HaveOccurred())
 		blockchain, err := getBlockChain(rpcClient, ethClient)

pkg/transformers/integration_tests/vat_slip.go

@@ -0,0 +1,59 @@
+package integration_tests
+
+import (
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+	"github.com/vulcanize/vulcanizedb/pkg/core"
+	"github.com/vulcanize/vulcanizedb/pkg/datastore/postgres"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/shared"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/vat_slip"
+	"github.com/vulcanize/vulcanizedb/test_config"
+)
+
+var _ = Describe("Vat slip transformer", func() {
+	var (
+		db         *postgres.DB
+		blockChain core.BlockChain
+	)
+
+	BeforeEach(func() {
+		rpcClient, ethClient, err := getClients(ipc)
+		Expect(err).NotTo(HaveOccurred())
+		blockChain, err = getBlockChain(rpcClient, ethClient)
+		Expect(err).NotTo(HaveOccurred())
+		db = test_config.NewTestDB(blockChain.Node())
+		test_config.CleanTestDB(db)
+
+		err = persistHeader(rpcClient, db, 8953655)
+		Expect(err).NotTo(HaveOccurred())
+	})
+
+	It("persists vat slip event", func(done Done) {
+		config := shared.TransformerConfig{
+			ContractAddresses:   []string{"0xcd726790550afcd77e9a7a47e86a3f9010af126b"},
+			StartingBlockNumber: 8953655,
+			EndingBlockNumber:   8953655,
+		}
+		transformerInitializer := vat_slip.VatSlipTransformerInitializer{Config: config}
+		transformer := transformerInitializer.NewVatSlipTransformer(db, blockChain)
+
+		err := transformer.Execute()
+
+		Expect(err).NotTo(HaveOccurred())
+		var headerID int64
+		err = db.Get(&headerID, `SELECT id FROM public.headers WHERE block_number = $1`, config.StartingBlockNumber)
+		Expect(err).NotTo(HaveOccurred())
+		var model vat_slip.VatSlipModel
+		err = db.Get(&model, `SELECT ilk, guy, rad, tx_idx FROM maker.vat_slip WHERE header_id = $1`, headerID)
+		Expect(err).NotTo(HaveOccurred())
+		Expect(model.Ilk).To(Equal("ETH"))
+		Expect(model.Guy).To(Equal("0xDA15dCE70ab462E66779f23ee14F21d993789eE3"))
+		Expect(model.Rad).To(Equal("100000000000000000000000000000000000000000000000"))
+		Expect(model.TransactionIndex).To(Equal(uint(0)))
+		var headerChecked bool
+		err = db.Get(&headerChecked, `SELECT vat_slip_checked FROM public.checked_headers WHERE header_id = $1`, headerID)
+		Expect(err).NotTo(HaveOccurred())
+		Expect(headerChecked).To(BeTrue())
+		close(done)
+	}, 15)
+})

pkg/transformers/integration_tests/vat_tune.go

@@ -31,7 +31,6 @@ var _ = Describe("VatTune Transformer", func() {
 		config.StartingBlockNumber = blockNumber
 		config.EndingBlockNumber = blockNumber
 
-		ipc := "https://kovan.infura.io/J5Vd2fRtGsw0zZ0Ov3BL"
 		rpcClient, ethClient, err := getClients(ipc)
 		Expect(err).NotTo(HaveOccurred())
 		blockchain, err := getBlockChain(rpcClient, ethClient)

pkg/transformers/shared/constants.go

@@ -60,6 +60,7 @@ var (
 	vatInitMethod             = GetSolidityMethodSignature(VatABI, "init")
 	vatMoveMethod             = GetSolidityMethodSignature(VatABI, "move")
 	vatFoldMethod             = GetSolidityMethodSignature(VatABI, "fold")
+	vatSlipMethod             = GetSolidityMethodSignature(VatABI, "slip")
 	vatTollMethod             = GetSolidityMethodSignature(VatABI, "toll")
 	vatTuneMethod             = GetSolidityMethodSignature(VatABI, "tune")
 	vatFluxMethod             = GetSolidityMethodSignature(VatABI, "flux")
@@ -87,6 +88,7 @@ var (
 	VatInitSignature             = GetLogNoteSignature(vatInitMethod)
 	VatMoveSignature             = GetLogNoteSignature(vatMoveMethod)
 	VatFoldSignature             = GetLogNoteSignature(vatFoldMethod)
+	VatSlipSignature             = GetLogNoteSignature(vatSlipMethod)
 	VatTollSignature             = GetLogNoteSignature(vatTollMethod)
 	VatTuneSignature             = GetLogNoteSignature(vatTuneMethod)
 	VatFluxSignature             = GetLogNoteSignature(vatFluxMethod)

pkg/transformers/shared/event_signature_generator_test.go

@@ -160,6 +160,13 @@ var _ = Describe("Event signature generator", func() {
 
 				Expect(expected).To(Equal(actual))
 			})
+
+			It("gets the vat slip method signature", func() {
+				expected := "slip(bytes32,bytes32,int256)"
+				actual := shared.GetSolidityMethodSignature(shared.VatABI, "slip")
+
+				Expect(expected).To(Equal(actual))
+			})
 		})
 
 		Describe("it handles events", func() {
@@ -196,7 +203,6 @@ var _ = Describe("Event signature generator", func() {
 				actual := shared.GetSolidityMethodSignature(shared.MedianizerABI, "LogValue")
 
 				Expect(expected).To(Equal(actual))
-
 			})
 		})
 	})

pkg/transformers/test_data/mocks/vat_slip/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 vat_slip
+
+import (
+	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/test_data"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/vat_slip"
+)
+
+type MockVatSlipConverter struct {
+	err        error
+	PassedLogs []types.Log
+}
+
+func (converter *MockVatSlipConverter) ToModels(ethLogs []types.Log) ([]vat_slip.VatSlipModel, error) {
+	converter.PassedLogs = ethLogs
+	return []vat_slip.VatSlipModel{test_data.VatSlipModel}, converter.err
+}
+
+func (converter *MockVatSlipConverter) SetConverterError(e error) {
+	converter.err = e
+}

pkg/transformers/test_data/mocks/vat_slip/repository.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 vat_slip
+
+import (
+	. "github.com/onsi/gomega"
+
+	"github.com/vulcanize/vulcanizedb/pkg/core"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/vat_slip"
+)
+
+type MockVatSlipRepository struct {
+	createError                     error
+	markHeaderCheckedError          error
+	markHeaderCheckedPassedHeaderID int64
+	missingHeadersError             error
+	missingHeaders                  []core.Header
+	PassedStartingBlockNumber       int64
+	PassedEndingBlockNumber         int64
+	PassedHeaderID                  int64
+	PassedModels                    []vat_slip.VatSlipModel
+}
+
+func (repository *MockVatSlipRepository) Create(headerID int64, models []vat_slip.VatSlipModel) error {
+	repository.PassedHeaderID = headerID
+	repository.PassedModels = models
+	return repository.createError
+}
+
+func (repository *MockVatSlipRepository) MarkHeaderChecked(headerID int64) error {
+	repository.markHeaderCheckedPassedHeaderID = headerID
+	return repository.markHeaderCheckedError
+}
+
+func (repository *MockVatSlipRepository) MissingHeaders(startingBlockNumber, endingBlockNumber int64) ([]core.Header, error) {
+	repository.PassedStartingBlockNumber = startingBlockNumber
+	repository.PassedEndingBlockNumber = endingBlockNumber
+	return repository.missingHeaders, repository.missingHeadersError
+}
+
+func (repository *MockVatSlipRepository) SetCreateError(e error) {
+	repository.createError = e
+}
+
+func (repository *MockVatSlipRepository) SetMarkHeaderCheckedErr(e error) {
+	repository.markHeaderCheckedError = e
+}
+
+func (repository *MockVatSlipRepository) SetMissingHeadersErr(e error) {
+	repository.missingHeadersError = e
+}
+
+func (repository *MockVatSlipRepository) SetMissingHeaders(headers []core.Header) {
+	repository.missingHeaders = headers
+}
+
+func (repository *MockVatSlipRepository) AssertMarkHeaderCheckedCalledWith(i int64) {
+	Expect(repository.markHeaderCheckedPassedHeaderID).To(Equal(i))
+}

pkg/transformers/test_data/vat_slip.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 test_data
+
+import (
+	"encoding/json"
+
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/core/types"
+
+	"github.com/ethereum/go-ethereum/common/hexutil"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/shared"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/vat_slip"
+)
+
+var EthVatSlipLog = types.Log{
+	Address: common.HexToAddress(shared.VatContractAddress),
+	Topics: []common.Hash{
+		common.HexToHash("0x42066cbb00000000000000000000000000000000000000000000000000000000"),
+		common.HexToHash("0x66616b6520696c6b000000000000000000000000000000000000000000000000"),
+		common.HexToHash("0x0000000000000000000000007d7bee5fcfd8028cf7b00876c5b1421c800561a6"),
+		common.HexToHash("0x000000000000000000000000000000000000000000000000000000003ade68b1"),
+	},
+	Data:        hexutil.MustDecode("0x0000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000006442066cbb66616b6520696c6b0000000000000000000000000000000000000000000000000000000000000000000000007d7bee5fcfd8028cf7b00876c5b1421c800561a6000000000000000000000000000000000000000000000000000000003ade68b1"),
+	BlockNumber: 10,
+	TxHash:      common.HexToHash("0xb114ba306c80c86d51bdbf4a5ac8ed151020cd81b70cfa1dc9822f4a1f73930b"),
+	TxIndex:     3,
+	BlockHash:   common.HexToHash("0x34b7e5ddb3be73257a5a0087f10b8bf68d4df5c8831ec04c63ecae4094de72ad"),
+	Index:       0,
+	Removed:     false,
+}
+
+var rawVatSlipLog, _ = json.Marshal(EthVatSlipLog)
+var VatSlipModel = vat_slip.VatSlipModel{
+	Ilk:              "fake ilk",
+	Guy:              common.HexToAddress("0x7d7bEe5fCfD8028cf7b00876C5b1421c800561A6").String(),
+	Rad:              "987654321",
+	TransactionIndex: EthVatSlipLog.TxIndex,
+	Raw:              rawVatSlipLog,
+}

pkg/transformers/transformers.go

@@ -43,6 +43,7 @@ import (
 	"github.com/vulcanize/vulcanizedb/pkg/transformers/vat_heal"
 	"github.com/vulcanize/vulcanizedb/pkg/transformers/vat_init"
 	"github.com/vulcanize/vulcanizedb/pkg/transformers/vat_move"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/vat_slip"
 	"github.com/vulcanize/vulcanizedb/pkg/transformers/vat_toll"
 	"github.com/vulcanize/vulcanizedb/pkg/transformers/vat_tune"
 )
@@ -74,6 +75,7 @@ var (
 	VatMoveTransformerInitializer             = vat_move.VatMoveTransformerInitializer{Config: vat_move.VatMoveConfig}.NewVatMoveTransformer
 	VatHealTransformerInitializer             = vat_heal.VatHealTransformerInitializer{Config: vat_heal.VatHealConfig}.NewVatHealTransformer
 	VatFoldTransformerInitializer             = vat_fold.VatFoldTransformerInitializer{Config: vat_fold.VatFoldConfig}.NewVatFoldTransformer
+	VatSlipTransformerInitializer             = vat_slip.VatSlipTransformerInitializer{Config: vat_slip.VatSlipConfig}.NewVatSlipTransformer
 	VatTollTransformerInitializer             = vat_toll.VatTollTransformerInitializer{Config: vat_toll.VatTollConfig}.NewVatTollTransformer
 	VatTuneTransformerInitializer             = vat_tune.VatTuneTransformerInitializer{Config: vat_tune.VatTuneConfig}.NewVatTuneTransformer
 	VatFluxTransformerInitializer             = vat_flux.VatFluxTransformerInitializer{Config: vat_flux.VatFluxConfig}.NewVatFluxTransformer
@@ -104,6 +106,7 @@ func TransformerInitializers() []shared.TransformerInitializer {
 		VatMoveTransformerInitializer,
 		VatHealTransformerInitializer,
 		VatFoldTransformerInitializer,
+		VatSlipTransformerInitializer,
 		VatTollTransformerInitializer,
 		VatTuneTransformerInitializer,
 		VatFluxTransformerInitializer,

pkg/transformers/vat_slip/config.go

@@ -0,0 +1,11 @@
+package vat_slip
+
+import "github.com/vulcanize/vulcanizedb/pkg/transformers/shared"
+
+var VatSlipConfig = shared.TransformerConfig{
+	ContractAddresses:   []string{shared.VatContractAddress},
+	ContractAbi:         shared.VatABI,
+	Topics:              []string{shared.VatSlipSignature},
+	StartingBlockNumber: 0,
+	EndingBlockNumber:   10000000,
+}

pkg/transformers/vat_slip/converter.go

@@ -0,0 +1,64 @@
+// 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 vat_slip
+
+import (
+	"bytes"
+	"encoding/json"
+	"errors"
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/core/types"
+)
+
+type Converter interface {
+	ToModels(ethLogs []types.Log) ([]VatSlipModel, error)
+}
+
+type VatSlipConverter struct{}
+
+func (VatSlipConverter) ToModels(ethLogs []types.Log) ([]VatSlipModel, error) {
+	var models []VatSlipModel
+	for _, ethLog := range ethLogs {
+		err := verifyLog(ethLog)
+		if err != nil {
+			return nil, err
+		}
+		ilk := string(bytes.Trim(ethLog.Topics[1].Bytes(), "\x00"))
+		guy := common.BytesToAddress(ethLog.Topics[2].Bytes())
+		rad := ethLog.Topics[3].Big()
+
+		raw, err := json.Marshal(ethLog)
+		if err != nil {
+			return nil, err
+		}
+		model := VatSlipModel{
+			Ilk:              ilk,
+			Guy:              guy.String(),
+			Rad:              rad.String(),
+			TransactionIndex: ethLog.TxIndex,
+			Raw:              raw,
+		}
+		models = append(models, model)
+	}
+	return models, nil
+}
+
+func verifyLog(log types.Log) error {
+	numTopicInValidLog := 4
+	if len(log.Topics) < numTopicInValidLog {
+		return errors.New("log missing topics")
+	}
+	return nil
+}

pkg/transformers/vat_slip/converter_test.go

@@ -0,0 +1,47 @@
+// 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 vat_slip_test
+
+import (
+	"github.com/ethereum/go-ethereum/core/types"
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/test_data"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/vat_slip"
+)
+
+var _ = Describe("Vat slip converter", func() {
+	It("returns err if log is missing topics", func() {
+		converter := vat_slip.VatSlipConverter{}
+		badLog := types.Log{
+			Data: []byte{1, 1, 1, 1, 1},
+		}
+
+		_, err := converter.ToModels([]types.Log{badLog})
+
+		Expect(err).To(HaveOccurred())
+	})
+
+	It("converts a log to an model", func() {
+		converter := vat_slip.VatSlipConverter{}
+
+		models, err := converter.ToModels([]types.Log{test_data.EthVatSlipLog})
+
+		Expect(err).NotTo(HaveOccurred())
+		Expect(len(models)).To(Equal(1))
+		Expect(models[0]).To(Equal(test_data.VatSlipModel))
+	})
+})

pkg/transformers/vat_slip/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 vat_slip
+
+type VatSlipModel struct {
+	Ilk              string
+	Guy              string
+	Rad              string
+	TransactionIndex uint   `db:"tx_idx"`
+	Raw              []byte `db:"raw_log"`
+}

pkg/transformers/vat_slip/repository.go

@@ -0,0 +1,74 @@
+package vat_slip
+
+import (
+	"github.com/vulcanize/vulcanizedb/pkg/core"
+	"github.com/vulcanize/vulcanizedb/pkg/datastore/postgres"
+)
+
+type Repository interface {
+	Create(headerID int64, models []VatSlipModel) error
+	MarkHeaderChecked(headerID int64) error
+	MissingHeaders(startingBlockNumber, endingBlockNumber int64) ([]core.Header, error)
+}
+
+type VatSlipRepository struct {
+	db *postgres.DB
+}
+
+func NewVatSlipRepository(db *postgres.DB) VatSlipRepository {
+	return VatSlipRepository{
+		db: db,
+	}
+}
+
+func (repository VatSlipRepository) Create(headerID int64, models []VatSlipModel) error {
+	tx, err := repository.db.Begin()
+	if err != nil {
+		return err
+	}
+	for _, model := range models {
+		_, err = tx.Exec(
+			`INSERT into maker.vat_slip (header_id, ilk, guy, rad, tx_idx, raw_log)
+        VALUES($1, $2, $3, $4::NUMERIC, $5, $6)`,
+			headerID, model.Ilk, model.Guy, model.Rad, model.TransactionIndex, model.Raw,
+		)
+		if err != nil {
+			tx.Rollback()
+			return err
+		}
+	}
+	_, err = tx.Exec(`INSERT INTO public.checked_headers (header_id, vat_slip_checked)
+		VALUES ($1, $2)
+	ON CONFLICT (header_id) DO
+		UPDATE SET vat_slip_checked = $2`, headerID, true)
+	if err != nil {
+		tx.Rollback()
+		return err
+	}
+	return tx.Commit()
+}
+
+func (repository VatSlipRepository) MarkHeaderChecked(headerID int64) error {
+	_, err := repository.db.Exec(`INSERT INTO public.checked_headers (header_id, vat_slip_checked)
+		VALUES ($1, $2)
+	ON CONFLICT (header_id) DO
+		UPDATE SET vat_slip_checked = $2`, headerID, true)
+	return err
+}
+
+func (repository VatSlipRepository) 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 checked_headers on headers.id = header_id
+               WHERE (header_id ISNULL OR vat_slip_checked IS FALSE)
+               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/vat_slip/repository_test.go

@@ -0,0 +1,178 @@
+package vat_slip_test
+
+import (
+	"database/sql"
+
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+
+	"github.com/vulcanize/vulcanizedb/pkg/core"
+	"github.com/vulcanize/vulcanizedb/pkg/datastore"
+	"github.com/vulcanize/vulcanizedb/pkg/datastore/postgres"
+	"github.com/vulcanize/vulcanizedb/pkg/datastore/postgres/repositories"
+	"github.com/vulcanize/vulcanizedb/pkg/fakes"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/test_data"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/vat_slip"
+	"github.com/vulcanize/vulcanizedb/test_config"
+)
+
+var _ = Describe("Vat slip repository", func() {
+	var (
+		db                *postgres.DB
+		vatSlipRepository vat_slip.Repository
+		err               error
+		headerRepository  datastore.HeaderRepository
+	)
+
+	BeforeEach(func() {
+		db = test_config.NewTestDB(core.Node{})
+		test_config.CleanTestDB(db)
+		headerRepository = repositories.NewHeaderRepository(db)
+		vatSlipRepository = vat_slip.NewVatSlipRepository(db)
+	})
+
+	Describe("Create", func() {
+		var headerID int64
+
+		BeforeEach(func() {
+			headerID, err = headerRepository.CreateOrUpdateHeader(fakes.FakeHeader)
+			Expect(err).NotTo(HaveOccurred())
+
+			err = vatSlipRepository.Create(headerID, []vat_slip.VatSlipModel{test_data.VatSlipModel})
+			Expect(err).NotTo(HaveOccurred())
+		})
+
+		It("adds a vat slip event", func() {
+			var dbVatSlip vat_slip.VatSlipModel
+			err = db.Get(&dbVatSlip, `SELECT ilk, guy, rad, tx_idx, raw_log FROM maker.vat_slip WHERE header_id = $1`, headerID)
+			Expect(err).NotTo(HaveOccurred())
+			Expect(dbVatSlip.Ilk).To(Equal(test_data.VatSlipModel.Ilk))
+			Expect(dbVatSlip.Guy).To(Equal(test_data.VatSlipModel.Guy))
+			Expect(dbVatSlip.Rad).To(Equal(test_data.VatSlipModel.Rad))
+			Expect(dbVatSlip.TransactionIndex).To(Equal(test_data.VatSlipModel.TransactionIndex))
+			Expect(dbVatSlip.Raw).To(MatchJSON(test_data.VatSlipModel.Raw))
+		})
+
+		It("marks header as checked for logs", func() {
+			var headerChecked bool
+			err = db.Get(&headerChecked, `SELECT vat_slip_checked FROM public.checked_headers WHERE header_id = $1`, headerID)
+			Expect(err).NotTo(HaveOccurred())
+			Expect(headerChecked).To(BeTrue())
+		})
+
+		It("does not duplicate vat slip events", func() {
+			err = vatSlipRepository.Create(headerID, []vat_slip.VatSlipModel{test_data.VatSlipModel})
+
+			Expect(err).To(HaveOccurred())
+			Expect(err.Error()).To(ContainSubstring("pq: duplicate key value violates unique constraint"))
+		})
+
+		It("removes vat slip if corresponding header is deleted", func() {
+			_, err = db.Exec(`DELETE FROM headers WHERE id = $1`, headerID)
+
+			Expect(err).NotTo(HaveOccurred())
+			var dbVatSlip vat_slip.VatSlipModel
+			err = db.Get(&dbVatSlip, `SELECT ilk, guy, rad, tx_idx, raw_log FROM maker.vat_slip WHERE header_id = $1`, headerID)
+			Expect(err).To(HaveOccurred())
+			Expect(err).To(MatchError(sql.ErrNoRows))
+		})
+	})
+
+	Describe("MarkHeaderChecked", func() {
+		var headerID int64
+
+		BeforeEach(func() {
+			headerID, err = headerRepository.CreateOrUpdateHeader(fakes.FakeHeader)
+			Expect(err).NotTo(HaveOccurred())
+		})
+
+		It("creates a row for a new headerID", func() {
+			err = vatSlipRepository.MarkHeaderChecked(headerID)
+
+			Expect(err).NotTo(HaveOccurred())
+			var headerChecked bool
+			err = db.Get(&headerChecked, `SELECT vat_slip_checked FROM public.checked_headers WHERE header_id = $1`, headerID)
+			Expect(err).NotTo(HaveOccurred())
+			Expect(headerChecked).To(BeTrue())
+		})
+
+		It("updates row when headerID already exists", func() {
+			_, err = db.Exec(`INSERT INTO public.checked_headers (header_id) VALUES ($1)`, headerID)
+
+			err = vatSlipRepository.MarkHeaderChecked(headerID)
+
+			Expect(err).NotTo(HaveOccurred())
+			var headerChecked bool
+			err = db.Get(&headerChecked, `SELECT vat_slip_checked FROM public.checked_headers WHERE header_id = $1`, headerID)
+			Expect(err).NotTo(HaveOccurred())
+			Expect(headerChecked).To(BeTrue())
+		})
+	})
+
+	Describe("MissingHeaders", func() {
+		var (
+			startingBlock, endingBlock, vatSlipBlock int64
+			blockNumbers, headerIDs                  []int64
+		)
+
+		BeforeEach(func() {
+			startingBlock = GinkgoRandomSeed()
+			vatSlipBlock = startingBlock + 1
+			endingBlock = startingBlock + 2
+
+			blockNumbers = []int64{startingBlock, vatSlipBlock, endingBlock, endingBlock + 1}
+
+			headerIDs = []int64{}
+			for _, n := range blockNumbers {
+				headerID, err := headerRepository.CreateOrUpdateHeader(fakes.GetFakeHeader(n))
+				Expect(err).NotTo(HaveOccurred())
+				headerIDs = append(headerIDs, headerID)
+			}
+		})
+
+		It("returns headers that haven't been checked", func() {
+			err := vatSlipRepository.MarkHeaderChecked(headerIDs[1])
+			Expect(err).NotTo(HaveOccurred())
+
+			headers, err := vatSlipRepository.MissingHeaders(startingBlock, endingBlock)
+
+			Expect(err).NotTo(HaveOccurred())
+			Expect(len(headers)).To(Equal(2))
+			Expect(headers[0].BlockNumber).To(Or(Equal(startingBlock), Equal(endingBlock)))
+			Expect(headers[1].BlockNumber).To(Or(Equal(startingBlock), Equal(endingBlock)))
+		})
+
+		It("only treats headers as checked if vat slip logs have been checked", func() {
+			_, err := db.Exec(`INSERT INTO public.checked_headers (header_id) VALUES ($1)`, headerIDs[1])
+			Expect(err).NotTo(HaveOccurred())
+
+			headers, err := vatSlipRepository.MissingHeaders(startingBlock, endingBlock)
+
+			Expect(err).NotTo(HaveOccurred())
+			Expect(len(headers)).To(Equal(3))
+			Expect(headers[0].BlockNumber).To(Or(Equal(startingBlock), Equal(endingBlock), Equal(vatSlipBlock)))
+			Expect(headers[1].BlockNumber).To(Or(Equal(startingBlock), Equal(endingBlock), Equal(vatSlipBlock)))
+			Expect(headers[2].BlockNumber).To(Or(Equal(startingBlock), Equal(endingBlock), Equal(vatSlipBlock)))
+		})
+
+		It("only returns headers associated with the current node", func() {
+			dbTwo := test_config.NewTestDB(core.Node{ID: "second"})
+			headerRepositoryTwo := repositories.NewHeaderRepository(dbTwo)
+			for _, n := range blockNumbers {
+				_, err = headerRepositoryTwo.CreateOrUpdateHeader(fakes.GetFakeHeader(n))
+				Expect(err).NotTo(HaveOccurred())
+			}
+			vatSlipRepositoryTwo := vat_slip.NewVatSlipRepository(dbTwo)
+			err := vatSlipRepository.MarkHeaderChecked(headerIDs[0])
+			Expect(err).NotTo(HaveOccurred())
+
+			nodeOneMissingHeaders, err := vatSlipRepository.MissingHeaders(blockNumbers[0], blockNumbers[len(blockNumbers)-1])
+			Expect(err).NotTo(HaveOccurred())
+			Expect(len(nodeOneMissingHeaders)).To(Equal(len(blockNumbers) - 1))
+
+			nodeTwoMissingHeaders, err := vatSlipRepositoryTwo.MissingHeaders(blockNumbers[0], blockNumbers[len(blockNumbers)-1])
+			Expect(err).NotTo(HaveOccurred())
+			Expect(len(nodeTwoMissingHeaders)).To(Equal(len(blockNumbers)))
+		})
+	})
+})

pkg/transformers/vat_slip/transformer.go

@@ -0,0 +1,64 @@
+package vat_slip
+
+import (
+	"log"
+
+	"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/shared"
+)
+
+type VatSlipTransformer struct {
+	Config     shared.TransformerConfig
+	Converter  Converter
+	Fetcher    shared.LogFetcher
+	Repository Repository
+}
+
+type VatSlipTransformerInitializer struct {
+	Config shared.TransformerConfig
+}
+
+func (initializer VatSlipTransformerInitializer) NewVatSlipTransformer(db *postgres.DB, blockChain core.BlockChain) shared.Transformer {
+	converter := VatSlipConverter{}
+	fetcher := shared.NewFetcher(blockChain)
+	repository := NewVatSlipRepository(db)
+	return VatSlipTransformer{
+		Config:     initializer.Config,
+		Converter:  converter,
+		Fetcher:    fetcher,
+		Repository: repository,
+	}
+}
+
+func (transformer VatSlipTransformer) Execute() error {
+	missingHeaders, err := transformer.Repository.MissingHeaders(transformer.Config.StartingBlockNumber, transformer.Config.EndingBlockNumber)
+	if err != nil {
+		return err
+	}
+	log.Printf("Fetching vat slip event logs for %d headers \n", len(missingHeaders))
+	for _, header := range missingHeaders {
+		topics := [][]common.Hash{{common.HexToHash(shared.VatSlipSignature)}}
+		matchingLogs, err := transformer.Fetcher.FetchLogs(VatSlipConfig.ContractAddresses, topics, header.BlockNumber)
+		if err != nil {
+			return err
+		}
+		if len(matchingLogs) < 1 {
+			err = transformer.Repository.MarkHeaderChecked(header.Id)
+			if err != nil {
+				return err
+			}
+		}
+		models, err := transformer.Converter.ToModels(matchingLogs)
+		if err != nil {
+			return err
+		}
+		err = transformer.Repository.Create(header.Id, models)
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}

pkg/transformers/vat_slip/transformer_test.go

@@ -0,0 +1,143 @@
+package vat_slip_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/shared"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/test_data"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/test_data/mocks"
+	vat_slip_mocks "github.com/vulcanize/vulcanizedb/pkg/transformers/test_data/mocks/vat_slip"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/vat_slip"
+)
+
+var _ = Describe("Vat slip transformer", func() {
+	var (
+		config      shared.TransformerConfig
+		converter   *vat_slip_mocks.MockVatSlipConverter
+		fetcher     *mocks.MockLogFetcher
+		repository  *vat_slip_mocks.MockVatSlipRepository
+		transformer vat_slip.VatSlipTransformer
+	)
+
+	BeforeEach(func() {
+		config = vat_slip.VatSlipConfig
+		converter = &vat_slip_mocks.MockVatSlipConverter{}
+		fetcher = &mocks.MockLogFetcher{}
+		repository = &vat_slip_mocks.MockVatSlipRepository{}
+		transformer = vat_slip.VatSlipTransformer{
+			Config:     config,
+			Converter:  converter,
+			Fetcher:    fetcher,
+			Repository: repository,
+		}
+	})
+
+	It("gets missing headers for block numbers specified in config", func() {
+		err := transformer.Execute()
+
+		Expect(err).NotTo(HaveOccurred())
+		Expect(repository.PassedStartingBlockNumber).To(Equal(vat_slip.VatSlipConfig.StartingBlockNumber))
+		Expect(repository.PassedEndingBlockNumber).To(Equal(vat_slip.VatSlipConfig.EndingBlockNumber))
+	})
+
+	It("returns error if repository returns error for missing headers", func() {
+		repository.SetMissingHeadersErr(fakes.FakeError)
+
+		err := transformer.Execute()
+
+		Expect(err).To(HaveOccurred())
+		Expect(err).To(MatchError(fakes.FakeError))
+	})
+
+	It("fetches logs for missing headers", func() {
+		headerOne := core.Header{BlockNumber: GinkgoRandomSeed()}
+		headerTwo := core.Header{BlockNumber: GinkgoRandomSeed()}
+		repository.SetMissingHeaders([]core.Header{headerOne, headerTwo})
+
+		err := transformer.Execute()
+
+		Expect(err).NotTo(HaveOccurred())
+		Expect(fetcher.FetchedBlocks).To(Equal([]int64{headerOne.BlockNumber, headerTwo.BlockNumber}))
+		Expect(fetcher.FetchedContractAddresses).To(Equal([][]string{vat_slip.VatSlipConfig.ContractAddresses, vat_slip.VatSlipConfig.ContractAddresses}))
+		Expect(fetcher.FetchedTopics).To(Equal([][]common.Hash{{common.HexToHash(shared.VatSlipSignature)}}))
+	})
+
+	It("returns error if fetcher returns error", func() {
+		fetcher.SetFetcherError(fakes.FakeError)
+		repository.SetMissingHeaders([]core.Header{{BlockNumber: GinkgoRandomSeed()}})
+
+		err := transformer.Execute()
+
+		Expect(err).To(HaveOccurred())
+		Expect(err).To(MatchError(fakes.FakeError))
+	})
+
+	It("marks header checked if no logs returned", func() {
+		headerID := GinkgoRandomSeed()
+		repository.SetMissingHeaders([]core.Header{{Id: headerID}})
+
+		err := transformer.Execute()
+
+		Expect(err).NotTo(HaveOccurred())
+		repository.AssertMarkHeaderCheckedCalledWith(headerID)
+	})
+
+	It("returns error if marking header checked returns err", func() {
+		repository.SetMissingHeaders([]core.Header{{Id: GinkgoRandomSeed()}})
+		repository.SetMarkHeaderCheckedErr(fakes.FakeError)
+
+		err := transformer.Execute()
+
+		Expect(err).To(HaveOccurred())
+		Expect(err).To(MatchError(fakes.FakeError))
+	})
+
+	It("converts matching logs", func() {
+		fetcher.SetFetchedLogs([]types.Log{test_data.EthVatSlipLog})
+		repository.SetMissingHeaders([]core.Header{{BlockNumber: GinkgoRandomSeed()}})
+
+		err := transformer.Execute()
+
+		Expect(err).NotTo(HaveOccurred())
+		Expect(converter.PassedLogs).To(Equal([]types.Log{test_data.EthVatSlipLog}))
+	})
+
+	It("returns error if converter returns error", func() {
+		converter.SetConverterError(fakes.FakeError)
+		fetcher.SetFetchedLogs([]types.Log{test_data.EthVatSlipLog})
+		repository.SetMissingHeaders([]core.Header{{BlockNumber: GinkgoRandomSeed()}})
+
+		err := transformer.Execute()
+
+		Expect(err).To(HaveOccurred())
+		Expect(err).To(MatchError(fakes.FakeError))
+	})
+
+	It("persists vat slip model", func() {
+		fetcher.SetFetchedLogs([]types.Log{test_data.EthVatSlipLog})
+		fakeHeader := core.Header{BlockNumber: GinkgoRandomSeed(), Id: GinkgoRandomSeed()}
+		repository.SetMissingHeaders([]core.Header{fakeHeader})
+
+		err := transformer.Execute()
+
+		Expect(err).NotTo(HaveOccurred())
+		Expect(repository.PassedHeaderID).To(Equal(fakeHeader.Id))
+		Expect(repository.PassedModels).To(Equal([]vat_slip.VatSlipModel{test_data.VatSlipModel}))
+	})
+
+	It("returns error if repository returns error for create", func() {
+		fetcher.SetFetchedLogs([]types.Log{test_data.EthVatSlipLog})
+		repository.SetMissingHeaders([]core.Header{{BlockNumber: GinkgoRandomSeed(), Id: GinkgoRandomSeed()}})
+		repository.SetCreateError(fakes.FakeError)
+
+		err := transformer.Execute()
+
+		Expect(err).To(HaveOccurred())
+		Expect(err).To(MatchError(fakes.FakeError))
+	})
+})

pkg/transformers/vat_slip/vat_slip_suite_test.go

@@ -0,0 +1,33 @@
+// 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 vat_slip_test
+
+import (
+	"testing"
+
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+	"io/ioutil"
+	"log"
+)
+
+func TestVatSlip(t *testing.T) {
+	RegisterFailHandler(Fail)
+	RunSpecs(t, "VatSlip Suite")
+}
+
+var _ = BeforeSuite(func() {
+	log.SetOutput(ioutil.Discard)
+})

test_config/test_config.go

@@ -101,6 +101,7 @@ func CleanTestDB(db *postgres.DB) {
 	db.MustExec("DELETE FROM maker.vat_init")
 	db.MustExec("DELETE FROM maker.vat_move")
 	db.MustExec("DELETE FROM maker.vat_fold")
+	db.MustExec("DELETE FROM maker.vat_slip")
 	db.MustExec("DELETE FROM maker.vat_toll")
 	db.MustExec("DELETE FROM maker.vat_tune")
 	db.MustExec("DELETE FROM maker.vat_flux")