Add Pit file stability fee event

- file event on the pit contract is overloaded and each implementation
  logs a note
- existing Pit file transformer now specified as dealing with ilks

pkg/transformers/pit_file/config.go

@@ -7,7 +7,7 @@ import (
 var PitFileConfig = shared.TransformerConfig{
 	ContractAddress:     "0xff3f2400f1600f3f493a9a92704a29b96795af1a", // temporary address from Ganache deploy
 	ContractAbi:         shared.PitABI,
-	Topics:              []string{shared.PitFileSignatureOne},
+	Topics:              []string{shared.PitFileIlkSignature, shared.PitFileDebtCeilingSignature, shared.PitFileStabilityFeeSignature},
 	StartingBlockNumber: 0,
 	EndingBlockNumber:   100,
 }

pkg/transformers/pit_file/converter_test.go

@@ -1,20 +0,0 @@
-package pit_file_test
-
-import (
-	. "github.com/onsi/ginkgo"
-	. "github.com/onsi/gomega"
-	"github.com/vulcanize/vulcanizedb/pkg/transformers/pit_file"
-	"github.com/vulcanize/vulcanizedb/pkg/transformers/shared"
-	"github.com/vulcanize/vulcanizedb/pkg/transformers/test_data"
-)
-
-var _ = Describe("Pit file converter", func() {
-	It("converts a log to an entity", func() {
-		converter := pit_file.PitFileConverter{}
-
-		model, err := converter.ToModel(test_data.PitAddress, shared.PitABI, test_data.EthPitFileLog)
-
-		Expect(err).NotTo(HaveOccurred())
-		Expect(model).To(Equal(test_data.PitFileModel))
-	})
-})

pkg/transformers/pit_file/debt_ceiling/debt_ceiling_suite_test.go

@@ -0,0 +1,13 @@
+package debt_ceiling_test
+
+import (
+	"testing"
+
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+)
+
+func TestDebtCeiling(t *testing.T) {
+	RegisterFailHandler(Fail)
+	RunSpecs(t, "DebtCeiling Suite")
+}

pkg/transformers/pit_file/ilk/converter.go

@@ -1,4 +1,4 @@
-package pit_file
+package ilk
 
 import (
 	"bytes"
@@ -8,13 +8,12 @@ import (
 )
 
 type Converter interface {
-	ToModel(contractAddress string, contractAbi string, ethLog types.Log) (PitFileModel, error)
+	ToModel(contractAddress string, contractAbi string, ethLog types.Log) (PitFileIlkModel, error)
 }
 
-type PitFileConverter struct {
-}
+type PitFileIlkConverter struct{}
 
-func (PitFileConverter) ToModel(contractAddress string, contractAbi string, ethLog types.Log) (entity PitFileModel, err error) {
+func (PitFileIlkConverter) ToModel(contractAddress string, contractAbi string, ethLog types.Log) (entity PitFileIlkModel, err error) {
 	ilk := string(bytes.Trim(ethLog.Topics[2].Bytes(), "\x00"))
 	what := string(bytes.Trim(ethLog.Topics[3].Bytes(), "\x00"))
 	itemByteLength := 32
@@ -22,10 +21,10 @@ func (PitFileConverter) ToModel(contractAddress string, contractAbi string, ethL
 	risk := big.NewInt(0).SetBytes(riskBytes).String()
 
 	raw, err := json.Marshal(ethLog)
-	return PitFileModel{
+	return PitFileIlkModel{
 		Ilk:              ilk,
 		What:             what,
-		Risk:             risk,
+		Data:             risk,
 		TransactionIndex: ethLog.TxIndex,
 		Raw:              raw,
 	}, err

pkg/transformers/pit_file/ilk/converter_test.go

@@ -0,0 +1,20 @@
+package ilk_test
+
+import (
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/pit_file/ilk"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/shared"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/test_data"
+)
+
+var _ = Describe("Pit file ilk converter", func() {
+	It("converts a log to an model", func() {
+		converter := ilk.PitFileIlkConverter{}
+
+		model, err := converter.ToModel(test_data.PitAddress, shared.PitABI, test_data.EthPitFileIlkLog)
+
+		Expect(err).NotTo(HaveOccurred())
+		Expect(model).To(Equal(test_data.PitFileIlkModel))
+	})
+})

pkg/transformers/pit_file/ilk/ilk_suite_test.go

@@ -1,4 +1,4 @@
-package pit_file_test
+package ilk_test
 
 import (
 	"testing"
@@ -7,7 +7,7 @@ import (
 	. "github.com/onsi/gomega"
 )
 
-func TestPitFile(t *testing.T) {
+func TestIlk(t *testing.T) {
 	RegisterFailHandler(Fail)
-	RunSpecs(t, "PitFile Suite")
+	RunSpecs(t, "Ilk Suite")
 }

pkg/transformers/pit_file/ilk/model.go

@@ -1,9 +1,9 @@
-package pit_file
+package ilk
 
-type PitFileModel struct {
+type PitFileIlkModel struct {
 	Ilk              string
 	What             string
-	Risk             string
+	Data             string
 	TransactionIndex uint   `db:"tx_idx"`
 	Raw              []byte `db:"raw_log"`
 }

pkg/transformers/pit_file/ilk/repository.go

@@ -1,4 +1,4 @@
-package pit_file
+package ilk
 
 import (
 	"github.com/vulcanize/vulcanizedb/pkg/core"
@@ -6,35 +6,35 @@ import (
 )
 
 type Repository interface {
-	Create(headerID int64, transactionIndex uint, model PitFileModel) error
+	Create(headerID int64, model PitFileIlkModel) error
 	MissingHeaders(startingBlockNumber, endingBlockNumber int64) ([]core.Header, error)
 }
 
-type PitFileRepository struct {
+type PitFileIlkRepository struct {
 	db *postgres.DB
 }
 
-func NewPitFileRepository(db *postgres.DB) PitFileRepository {
-	return PitFileRepository{
+func NewPitFileIlkRepository(db *postgres.DB) PitFileIlkRepository {
+	return PitFileIlkRepository{
 		db: db,
 	}
 }
 
-func (repository PitFileRepository) Create(headerID int64, transactionIndex uint, model PitFileModel) error {
+func (repository PitFileIlkRepository) Create(headerID int64, model PitFileIlkModel) error {
 	_, err := repository.db.Exec(
-		`INSERT into maker.pit_file (header_id, ilk, what, risk, tx_idx, raw_log)
+		`INSERT into maker.pit_file_ilk (header_id, ilk, what, data, tx_idx, raw_log)
         VALUES($1, $2, $3, $4::NUMERIC, $5, $6)`,
-		headerID, model.Ilk, model.What, model.Risk, model.TransactionIndex, model.Raw,
+		headerID, model.Ilk, model.What, model.Data, model.TransactionIndex, model.Raw,
 	)
 	return err
 }
 
-func (repository PitFileRepository) MissingHeaders(startingBlockNumber, endingBlockNumber int64) ([]core.Header, error) {
+func (repository PitFileIlkRepository) 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.pit_file on headers.id = header_id
+               LEFT JOIN maker.pit_file_ilk on headers.id = header_id
                WHERE header_id ISNULL
                AND headers.block_number >= $1
                AND headers.block_number <= $2

pkg/transformers/pit_file/ilk/repository_test.go

@@ -0,0 +1,129 @@
+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/pit_file/ilk"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/test_data"
+	"github.com/vulcanize/vulcanizedb/test_config"
+)
+
+var _ = Describe("Pit file ilk repository", func() {
+	Describe("Create", func() {
+		It("adds a pit 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())
+			pitFileRepository := ilk.NewPitFileIlkRepository(db)
+
+			err = pitFileRepository.Create(headerID, test_data.PitFileIlkModel)
+
+			Expect(err).NotTo(HaveOccurred())
+			var dbPitFile ilk.PitFileIlkModel
+			err = db.Get(&dbPitFile, `SELECT ilk, what, data, tx_idx, raw_log FROM maker.pit_file_ilk WHERE header_id = $1`, headerID)
+			Expect(err).NotTo(HaveOccurred())
+			Expect(dbPitFile.Ilk).To(Equal(test_data.PitFileIlkModel.Ilk))
+			Expect(dbPitFile.What).To(Equal(test_data.PitFileIlkModel.What))
+			Expect(dbPitFile.Data).To(Equal(test_data.PitFileIlkModel.Data))
+			Expect(dbPitFile.TransactionIndex).To(Equal(test_data.PitFileIlkModel.TransactionIndex))
+			Expect(dbPitFile.Raw).To(MatchJSON(test_data.PitFileIlkModel.Raw))
+		})
+
+		It("does not duplicate pit file ilk 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())
+			pitFileRepository := ilk.NewPitFileIlkRepository(db)
+			err = pitFileRepository.Create(headerID, test_data.PitFileIlkModel)
+			Expect(err).NotTo(HaveOccurred())
+
+			err = pitFileRepository.Create(headerID, test_data.PitFileIlkModel)
+
+			Expect(err).To(HaveOccurred())
+			Expect(err.Error()).To(ContainSubstring("pq: duplicate key value violates unique constraint"))
+		})
+
+		It("removes pit file ilk 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())
+			pitFileRepository := ilk.NewPitFileIlkRepository(db)
+			err = pitFileRepository.Create(headerID, test_data.PitFileIlkModel)
+			Expect(err).NotTo(HaveOccurred())
+
+			_, err = db.Exec(`DELETE FROM headers WHERE id = $1`, headerID)
+
+			Expect(err).NotTo(HaveOccurred())
+			var dbPitFile ilk.PitFileIlkModel
+			err = db.Get(&dbPitFile, `SELECT ilk, what, data, tx_idx, raw_log FROM maker.pit_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 pit file ilk event", func() {
+			db := test_config.NewTestDB(core.Node{})
+			test_config.CleanTestDB(db)
+			headerRepository := repositories.NewHeaderRepository(db)
+			startingBlockNumber := int64(1)
+			pitFileBlockNumber := int64(2)
+			endingBlockNumber := int64(3)
+			blockNumbers := []int64{startingBlockNumber, pitFileBlockNumber, 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())
+			}
+			pitFileRepository := ilk.NewPitFileIlkRepository(db)
+			err := pitFileRepository.Create(headerIDs[1], test_data.PitFileIlkModel)
+			Expect(err).NotTo(HaveOccurred())
+
+			headers, err := pitFileRepository.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())
+			}
+			pitFileRepository := ilk.NewPitFileIlkRepository(db)
+			pitFileRepositoryTwo := ilk.NewPitFileIlkRepository(dbTwo)
+			err := pitFileRepository.Create(headerIDs[0], test_data.PitFileIlkModel)
+			Expect(err).NotTo(HaveOccurred())
+
+			nodeOneMissingHeaders, err := pitFileRepository.MissingHeaders(blockNumbers[0], blockNumbers[len(blockNumbers)-1])
+			Expect(err).NotTo(HaveOccurred())
+			Expect(len(nodeOneMissingHeaders)).To(Equal(len(blockNumbers) - 1))
+
+			nodeTwoMissingHeaders, err := pitFileRepositoryTwo.MissingHeaders(blockNumbers[0], blockNumbers[len(blockNumbers)-1])
+			Expect(err).NotTo(HaveOccurred())
+			Expect(len(nodeTwoMissingHeaders)).To(Equal(len(blockNumbers)))
+		})
+	})
+})

pkg/transformers/pit_file/ilk/transformer.go

@@ -1,28 +1,29 @@
-package pit_file
+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/pit_file"
 	"github.com/vulcanize/vulcanizedb/pkg/transformers/shared"
 )
 
-type PitFileTransformer struct {
+type PitFileIlkTransformer struct {
 	Config     shared.TransformerConfig
 	Converter  Converter
 	Fetcher    shared.LogFetcher
 	Repository Repository
 }
 
-type PitFileTransformerInitializer struct {
+type PitFileIlkTransformerInitializer struct {
 	Config shared.TransformerConfig
 }
 
-func (initializer PitFileTransformerInitializer) NewPitFileTransformer(db *postgres.DB, blockChain core.BlockChain) shared.Transformer {
-	converter := PitFileConverter{}
+func (initializer PitFileIlkTransformerInitializer) NewPitFileIlkTransformer(db *postgres.DB, blockChain core.BlockChain) shared.Transformer {
+	converter := PitFileIlkConverter{}
 	fetcher := shared.NewFetcher(blockChain)
-	repository := NewPitFileRepository(db)
-	return PitFileTransformer{
+	repository := NewPitFileIlkRepository(db)
+	return PitFileIlkTransformer{
 		Config:     initializer.Config,
 		Converter:  converter,
 		Fetcher:    fetcher,
@@ -30,23 +31,23 @@ func (initializer PitFileTransformerInitializer) NewPitFileTransformer(db *postg
 	}
 }
 
-func (transformer PitFileTransformer) Execute() error {
+func (transformer PitFileIlkTransformer) 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.PitFileSignatureOne)}}
-		matchingLogs, err := transformer.Fetcher.FetchLogs(PitFileConfig.ContractAddress, topics, header.BlockNumber)
+		topics := [][]common.Hash{{common.HexToHash(shared.PitFileIlkSignature)}}
+		matchingLogs, err := transformer.Fetcher.FetchLogs(pit_file.PitFileConfig.ContractAddress, topics, header.BlockNumber)
 		if err != nil {
 			return err
 		}
 		for _, log := range matchingLogs {
-			model, err := transformer.Converter.ToModel(PitFileConfig.ContractAddress, shared.PitABI, log)
+			model, err := transformer.Converter.ToModel(pit_file.PitFileConfig.ContractAddress, shared.PitABI, log)
 			if err != nil {
 				return err
 			}
-			err = transformer.Repository.Create(header.Id, log.TxIndex, model)
+			err = transformer.Repository.Create(header.Id, model)
 			if err != nil {
 				return err
 			}

pkg/transformers/pit_file/ilk/transformer_test.go

@@ -1,4 +1,4 @@
-package pit_file_test
+package ilk_test
 
 import (
 	"github.com/ethereum/go-ethereum/common"
@@ -8,19 +8,20 @@ import (
 	"github.com/vulcanize/vulcanizedb/pkg/core"
 	"github.com/vulcanize/vulcanizedb/pkg/fakes"
 	"github.com/vulcanize/vulcanizedb/pkg/transformers/pit_file"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/pit_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"
-	pit_file_mocks "github.com/vulcanize/vulcanizedb/pkg/transformers/test_data/mocks/pit_file"
+	pit_file_ilk_mocks "github.com/vulcanize/vulcanizedb/pkg/transformers/test_data/mocks/pit_file/ilk"
 )
 
-var _ = Describe("Pit file transformer", func() {
+var _ = Describe("Pit file ilk transformer", func() {
 	It("gets missing headers for block numbers specified in config", func() {
-		repository := &pit_file_mocks.MockPitFileRepository{}
-		transformer := pit_file.PitFileTransformer{
+		repository := &pit_file_ilk_mocks.MockPitFileIlkRepository{}
+		transformer := ilk.PitFileIlkTransformer{
 			Config:     pit_file.PitFileConfig,
 			Fetcher:    &mocks.MockLogFetcher{},
-			Converter:  &pit_file_mocks.MockPitFileConverter{},
+			Converter:  &pit_file_ilk_mocks.MockPitFileIlkConverter{},
 			Repository: repository,
 		}
 
@@ -32,11 +33,11 @@ var _ = Describe("Pit file transformer", func() {
 	})
 
 	It("returns error if repository returns error for missing headers", func() {
-		repository := &pit_file_mocks.MockPitFileRepository{}
+		repository := &pit_file_ilk_mocks.MockPitFileIlkRepository{}
 		repository.SetMissingHeadersErr(fakes.FakeError)
-		transformer := pit_file.PitFileTransformer{
+		transformer := ilk.PitFileIlkTransformer{
 			Fetcher:    &mocks.MockLogFetcher{},
-			Converter:  &pit_file_mocks.MockPitFileConverter{},
+			Converter:  &pit_file_ilk_mocks.MockPitFileIlkConverter{},
 			Repository: repository,
 		}
 
@@ -48,11 +49,11 @@ var _ = Describe("Pit file transformer", func() {
 
 	It("fetches logs for missing headers", func() {
 		fetcher := &mocks.MockLogFetcher{}
-		repository := &pit_file_mocks.MockPitFileRepository{}
+		repository := &pit_file_ilk_mocks.MockPitFileIlkRepository{}
 		repository.SetMissingHeaders([]core.Header{{BlockNumber: 1}, {BlockNumber: 2}})
-		transformer := pit_file.PitFileTransformer{
+		transformer := ilk.PitFileIlkTransformer{
 			Fetcher:    fetcher,
-			Converter:  &pit_file_mocks.MockPitFileConverter{},
+			Converter:  &pit_file_ilk_mocks.MockPitFileIlkConverter{},
 			Repository: repository,
 		}
 
@@ -61,17 +62,17 @@ var _ = Describe("Pit file transformer", func() {
 		Expect(err).NotTo(HaveOccurred())
 		Expect(fetcher.FetchedBlocks).To(Equal([]int64{1, 2}))
 		Expect(fetcher.FetchedContractAddress).To(Equal(pit_file.PitFileConfig.ContractAddress))
-		Expect(fetcher.FetchedTopics).To(Equal([][]common.Hash{{common.HexToHash(shared.PitFileSignatureOne)}}))
+		Expect(fetcher.FetchedTopics).To(Equal([][]common.Hash{{common.HexToHash(shared.PitFileIlkSignature)}}))
 	})
 
 	It("returns error if fetcher returns error", func() {
 		fetcher := &mocks.MockLogFetcher{}
 		fetcher.SetFetcherError(fakes.FakeError)
-		repository := &pit_file_mocks.MockPitFileRepository{}
+		repository := &pit_file_ilk_mocks.MockPitFileIlkRepository{}
 		repository.SetMissingHeaders([]core.Header{{BlockNumber: 1}})
-		transformer := pit_file.PitFileTransformer{
+		transformer := ilk.PitFileIlkTransformer{
 			Fetcher:    fetcher,
-			Converter:  &pit_file_mocks.MockPitFileConverter{},
+			Converter:  &pit_file_ilk_mocks.MockPitFileIlkConverter{},
 			Repository: repository,
 		}
 
@@ -82,12 +83,12 @@ var _ = Describe("Pit file transformer", func() {
 	})
 
 	It("converts matching logs", func() {
-		converter := &pit_file_mocks.MockPitFileConverter{}
+		converter := &pit_file_ilk_mocks.MockPitFileIlkConverter{}
 		fetcher := &mocks.MockLogFetcher{}
-		fetcher.SetFetchedLogs([]types.Log{test_data.EthPitFileLog})
-		repository := &pit_file_mocks.MockPitFileRepository{}
+		fetcher.SetFetchedLogs([]types.Log{test_data.EthPitFileIlkLog})
+		repository := &pit_file_ilk_mocks.MockPitFileIlkRepository{}
 		repository.SetMissingHeaders([]core.Header{{BlockNumber: 1}})
-		transformer := pit_file.PitFileTransformer{
+		transformer := ilk.PitFileIlkTransformer{
 			Fetcher:    fetcher,
 			Converter:  converter,
 			Repository: repository,
@@ -98,17 +99,17 @@ var _ = Describe("Pit file transformer", func() {
 		Expect(err).NotTo(HaveOccurred())
 		Expect(converter.PassedContractAddress).To(Equal(pit_file.PitFileConfig.ContractAddress))
 		Expect(converter.PassedContractABI).To(Equal(pit_file.PitFileConfig.ContractAbi))
-		Expect(converter.PassedLog).To(Equal(test_data.EthPitFileLog))
+		Expect(converter.PassedLog).To(Equal(test_data.EthPitFileIlkLog))
 	})
 
 	It("returns error if converter returns error", func() {
-		converter := &pit_file_mocks.MockPitFileConverter{}
+		converter := &pit_file_ilk_mocks.MockPitFileIlkConverter{}
 		converter.SetConverterError(fakes.FakeError)
 		fetcher := &mocks.MockLogFetcher{}
-		fetcher.SetFetchedLogs([]types.Log{test_data.EthPitFileLog})
-		repository := &pit_file_mocks.MockPitFileRepository{}
+		fetcher.SetFetchedLogs([]types.Log{test_data.EthPitFileIlkLog})
+		repository := &pit_file_ilk_mocks.MockPitFileIlkRepository{}
 		repository.SetMissingHeaders([]core.Header{{BlockNumber: 1}})
-		transformer := pit_file.PitFileTransformer{
+		transformer := ilk.PitFileIlkTransformer{
 			Fetcher:    fetcher,
 			Converter:  converter,
 			Repository: repository,
@@ -121,13 +122,13 @@ var _ = Describe("Pit file transformer", func() {
 	})
 
 	It("persists pit file model", func() {
-		converter := &pit_file_mocks.MockPitFileConverter{}
+		converter := &pit_file_ilk_mocks.MockPitFileIlkConverter{}
 		fetcher := &mocks.MockLogFetcher{}
-		fetcher.SetFetchedLogs([]types.Log{test_data.EthPitFileLog})
-		repository := &pit_file_mocks.MockPitFileRepository{}
+		fetcher.SetFetchedLogs([]types.Log{test_data.EthPitFileIlkLog})
+		repository := &pit_file_ilk_mocks.MockPitFileIlkRepository{}
 		fakeHeader := core.Header{BlockNumber: 1, Id: 2}
 		repository.SetMissingHeaders([]core.Header{fakeHeader})
-		transformer := pit_file.PitFileTransformer{
+		transformer := ilk.PitFileIlkTransformer{
 			Fetcher:    fetcher,
 			Converter:  converter,
 			Repository: repository,
@@ -137,18 +138,17 @@ var _ = Describe("Pit file transformer", func() {
 
 		Expect(err).NotTo(HaveOccurred())
 		Expect(repository.PassedHeaderID).To(Equal(fakeHeader.Id))
-		Expect(repository.PassedTransactionIndex).To(Equal(test_data.EthPitFileLog.TxIndex))
-		Expect(repository.PassedModel).To(Equal(test_data.PitFileModel))
+		Expect(repository.PassedModel).To(Equal(test_data.PitFileIlkModel))
 	})
 
 	It("returns error if repository returns error for create", func() {
-		converter := &pit_file_mocks.MockPitFileConverter{}
+		converter := &pit_file_ilk_mocks.MockPitFileIlkConverter{}
 		fetcher := &mocks.MockLogFetcher{}
-		fetcher.SetFetchedLogs([]types.Log{test_data.EthPitFileLog})
-		repository := &pit_file_mocks.MockPitFileRepository{}
+		fetcher.SetFetchedLogs([]types.Log{test_data.EthPitFileIlkLog})
+		repository := &pit_file_ilk_mocks.MockPitFileIlkRepository{}
 		repository.SetMissingHeaders([]core.Header{{BlockNumber: 1, Id: 2}})
 		repository.SetCreateError(fakes.FakeError)
-		transformer := pit_file.PitFileTransformer{
+		transformer := ilk.PitFileIlkTransformer{
 			Fetcher:    fetcher,
 			Converter:  converter,
 			Repository: repository,

pkg/transformers/pit_file/stability_fee/converter.go

@@ -0,0 +1,27 @@
+package stability_fee
+
+import (
+	"bytes"
+	"encoding/json"
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/core/types"
+)
+
+type Converter interface {
+	ToModel(contractAddress string, contractAbi string, ethLog types.Log) (PitFileStabilityFeeModel, error)
+}
+
+type PitFileStabilityFeeConverter struct{}
+
+func (PitFileStabilityFeeConverter) ToModel(contractAddress string, contractAbi string, ethLog types.Log) (PitFileStabilityFeeModel, error) {
+	what := string(bytes.Trim(ethLog.Topics[2].Bytes(), "\x00"))
+	data := common.HexToAddress(ethLog.Topics[1].String()).Hex()
+
+	raw, err := json.Marshal(ethLog)
+	return PitFileStabilityFeeModel{
+		What:             what,
+		Data:             data,
+		TransactionIndex: ethLog.TxIndex,
+		Raw:              raw,
+	}, err
+}

pkg/transformers/pit_file/stability_fee/converter_test.go

@@ -0,0 +1,20 @@
+package stability_fee_test
+
+import (
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/pit_file/stability_fee"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/shared"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/test_data"
+)
+
+var _ = Describe("Pit file stability fee converter", func() {
+	It("converts a log to an model", func() {
+		converter := stability_fee.PitFileStabilityFeeConverter{}
+
+		model, err := converter.ToModel(test_data.PitAddress, shared.PitABI, test_data.EthPitFileStabilityFeeLog)
+
+		Expect(err).NotTo(HaveOccurred())
+		Expect(model).To(Equal(test_data.PitFileStabilityFeeModel))
+	})
+})

pkg/transformers/pit_file/stability_fee/model.go

@@ -0,0 +1,8 @@
+package stability_fee
+
+type PitFileStabilityFeeModel struct {
+	What             string
+	Data             string
+	TransactionIndex uint   `db:"tx_idx"`
+	Raw              []byte `db:"raw_log"`
+}

pkg/transformers/pit_file/stability_fee/repository.go

@@ -0,0 +1,48 @@
+package stability_fee
+
+import (
+	"github.com/vulcanize/vulcanizedb/pkg/core"
+	"github.com/vulcanize/vulcanizedb/pkg/datastore/postgres"
+)
+
+type Repository interface {
+	Create(headerID int64, model PitFileStabilityFeeModel) error
+	MissingHeaders(startingBlockNumber, endingBlockNumber int64) ([]core.Header, error)
+}
+
+type PitFileStabilityFeeRepository struct {
+	db *postgres.DB
+}
+
+func NewPitFileStabilityFeeRepository(db *postgres.DB) PitFileStabilityFeeRepository {
+	return PitFileStabilityFeeRepository{
+		db: db,
+	}
+}
+
+func (repository PitFileStabilityFeeRepository) Create(headerID int64, model PitFileStabilityFeeModel) error {
+	_, err := repository.db.Exec(
+		`INSERT into maker.pit_file_stability_fee (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 PitFileStabilityFeeRepository) 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.pit_file_stability_fee 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/pit_file/stability_fee/repository_test.go

@@ -1,37 +1,38 @@
-package pit_file_test
+package stability_fee_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/pit_file"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/pit_file/stability_fee"
 	"github.com/vulcanize/vulcanizedb/pkg/transformers/test_data"
 	"github.com/vulcanize/vulcanizedb/test_config"
 )
 
-var _ = Describe("Pit file repository", func() {
+var _ = Describe("", func() {
 	Describe("Create", func() {
-		It("adds a pit file event", func() {
+		It("adds a pit file stability fee 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())
-			pitFileRepository := pit_file.NewPitFileRepository(db)
+			pitFileRepository := stability_fee.NewPitFileStabilityFeeRepository(db)
 
-			err = pitFileRepository.Create(headerID, 123, test_data.PitFileModel)
+			err = pitFileRepository.Create(headerID, test_data.PitFileStabilityFeeModel)
 
 			Expect(err).NotTo(HaveOccurred())
-			var dbPitFile pit_file.PitFileModel
-			err = db.Get(&dbPitFile, `SELECT ilk, what, risk, tx_idx, raw_log FROM maker.pit_file WHERE header_id = $1`, headerID)
+			var dbPitFile stability_fee.PitFileStabilityFeeModel
+			err = db.Get(&dbPitFile, `SELECT what, data, tx_idx, raw_log FROM maker.pit_file_stability_fee WHERE header_id = $1`, headerID)
 			Expect(err).NotTo(HaveOccurred())
-			Expect(dbPitFile.Ilk).To(Equal(test_data.PitFileModel.Ilk))
-			Expect(dbPitFile.What).To(Equal(test_data.PitFileModel.What))
-			Expect(dbPitFile.Risk).To(Equal(test_data.PitFileModel.Risk))
-			Expect(dbPitFile.TransactionIndex).To(Equal(test_data.PitFileModel.TransactionIndex))
-			Expect(dbPitFile.Raw).To(MatchJSON(test_data.PitFileModel.Raw))
+			Expect(dbPitFile.What).To(Equal(test_data.PitFileStabilityFeeModel.What))
+			Expect(dbPitFile.Data).To(Equal(test_data.PitFileStabilityFeeModel.Data))
+			Expect(dbPitFile.TransactionIndex).To(Equal(test_data.PitFileStabilityFeeModel.TransactionIndex))
+			Expect(dbPitFile.Raw).To(MatchJSON(test_data.PitFileStabilityFeeModel.Raw))
 		})
 
 		It("does not duplicate pit file events", func() {
@@ -40,11 +41,11 @@ var _ = Describe("Pit file repository", func() {
 			headerRepository := repositories.NewHeaderRepository(db)
 			headerID, err := headerRepository.CreateOrUpdateHeader(core.Header{})
 			Expect(err).NotTo(HaveOccurred())
-			pitFileRepository := pit_file.NewPitFileRepository(db)
-			err = pitFileRepository.Create(headerID, 123, test_data.PitFileModel)
+			pitFileRepository := stability_fee.NewPitFileStabilityFeeRepository(db)
+			err = pitFileRepository.Create(headerID, test_data.PitFileStabilityFeeModel)
 			Expect(err).NotTo(HaveOccurred())
 
-			err = pitFileRepository.Create(headerID, 123, test_data.PitFileModel)
+			err = pitFileRepository.Create(headerID, test_data.PitFileStabilityFeeModel)
 
 			Expect(err).To(HaveOccurred())
 			Expect(err.Error()).To(ContainSubstring("pq: duplicate key value violates unique constraint"))
@@ -56,15 +57,15 @@ var _ = Describe("Pit file repository", func() {
 			headerRepository := repositories.NewHeaderRepository(db)
 			headerID, err := headerRepository.CreateOrUpdateHeader(core.Header{})
 			Expect(err).NotTo(HaveOccurred())
-			pitFileRepository := pit_file.NewPitFileRepository(db)
-			err = pitFileRepository.Create(headerID, 123, test_data.PitFileModel)
+			pitFileRepository := stability_fee.NewPitFileStabilityFeeRepository(db)
+			err = pitFileRepository.Create(headerID, test_data.PitFileStabilityFeeModel)
 			Expect(err).NotTo(HaveOccurred())
 
 			_, err = db.Exec(`DELETE FROM headers WHERE id = $1`, headerID)
 
 			Expect(err).NotTo(HaveOccurred())
-			var dbPitFile pit_file.PitFileModel
-			err = db.Get(&dbPitFile, `SELECT ilk, what, risk, tx_idx, raw_log FROM maker.pit_file WHERE header_id = $1`, headerID)
+			var dbPitFile stability_fee.PitFileStabilityFeeModel
+			err = db.Get(&dbPitFile, `SELECT what, data, tx_idx, raw_log FROM maker.pit_file_stability_fee WHERE header_id = $1`, headerID)
 			Expect(err).To(HaveOccurred())
 			Expect(err).To(MatchError(sql.ErrNoRows))
 		})
@@ -85,8 +86,8 @@ var _ = Describe("Pit file repository", func() {
 				headerIDs = append(headerIDs, headerID)
 				Expect(err).NotTo(HaveOccurred())
 			}
-			pitFileRepository := pit_file.NewPitFileRepository(db)
-			err := pitFileRepository.Create(headerIDs[1], 123, test_data.PitFileModel)
+			pitFileRepository := stability_fee.NewPitFileStabilityFeeRepository(db)
+			err := pitFileRepository.Create(headerIDs[1], test_data.PitFileStabilityFeeModel)
 			Expect(err).NotTo(HaveOccurred())
 
 			headers, err := pitFileRepository.MissingHeaders(startingBlockNumber, endingBlockNumber)
@@ -112,9 +113,9 @@ var _ = Describe("Pit file repository", func() {
 				_, err = headerRepositoryTwo.CreateOrUpdateHeader(core.Header{BlockNumber: n})
 				Expect(err).NotTo(HaveOccurred())
 			}
-			pitFileRepository := pit_file.NewPitFileRepository(db)
-			pitFileRepositoryTwo := pit_file.NewPitFileRepository(dbTwo)
-			err := pitFileRepository.Create(headerIDs[0], 0, test_data.PitFileModel)
+			pitFileRepository := stability_fee.NewPitFileStabilityFeeRepository(db)
+			pitFileRepositoryTwo := stability_fee.NewPitFileStabilityFeeRepository(dbTwo)
+			err := pitFileRepository.Create(headerIDs[0], test_data.PitFileStabilityFeeModel)
 			Expect(err).NotTo(HaveOccurred())
 
 			nodeOneMissingHeaders, err := pitFileRepository.MissingHeaders(blockNumbers[0], blockNumbers[len(blockNumbers)-1])

pkg/transformers/pit_file/stability_fee/stability_fee_suite_test.go

@@ -0,0 +1,13 @@
+package stability_fee_test
+
+import (
+	"testing"
+
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+)
+
+func TestStabilityFee(t *testing.T) {
+	RegisterFailHandler(Fail)
+	RunSpecs(t, "StabilityFee Suite")
+}

pkg/transformers/pit_file/stability_fee/transformer.go

@@ -0,0 +1,57 @@
+package stability_fee
+
+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/pit_file"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/shared"
+)
+
+type PitFileStabilityFeeTransformer struct {
+	Config     shared.TransformerConfig
+	Converter  Converter
+	Fetcher    shared.LogFetcher
+	Repository Repository
+}
+
+type PitFileStabilityFeeTransformerInitializer struct {
+	Config shared.TransformerConfig
+}
+
+func (initializer PitFileStabilityFeeTransformerInitializer) NewPitFileStabilityFeeTransformer(db *postgres.DB, blockChain core.BlockChain) shared.Transformer {
+	converter := PitFileStabilityFeeConverter{}
+	fetcher := shared.NewFetcher(blockChain)
+	repository := NewPitFileStabilityFeeRepository(db)
+	return PitFileStabilityFeeTransformer{
+		Config:     initializer.Config,
+		Converter:  converter,
+		Fetcher:    fetcher,
+		Repository: repository,
+	}
+}
+
+func (transformer PitFileStabilityFeeTransformer) 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.PitFileStabilityFeeSignature)}}
+		matchingLogs, err := transformer.Fetcher.FetchLogs(pit_file.PitFileConfig.ContractAddress, topics, header.BlockNumber)
+		if err != nil {
+			return err
+		}
+		for _, log := range matchingLogs {
+			model, err := transformer.Converter.ToModel(pit_file.PitFileConfig.ContractAddress, shared.PitABI, log)
+			if err != nil {
+				return err
+			}
+			err = transformer.Repository.Create(header.Id, model)
+			if err != nil {
+				return err
+			}
+		}
+	}
+	return nil
+}

pkg/transformers/pit_file/stability_fee/transformer_test.go

@@ -0,0 +1,163 @@
+package stability_fee_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/pit_file"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/pit_file/stability_fee"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/shared"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/test_data"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/test_data/mocks"
+	stability_fee_mocks "github.com/vulcanize/vulcanizedb/pkg/transformers/test_data/mocks/pit_file/stability_fee"
+)
+
+var _ = Describe("", func() {
+	It("gets missing headers for block numbers specified in config", func() {
+		repository := &stability_fee_mocks.MockPitFileStabilityFeeRepository{}
+		transformer := stability_fee.PitFileStabilityFeeTransformer{
+			Config:     pit_file.PitFileConfig,
+			Fetcher:    &mocks.MockLogFetcher{},
+			Converter:  &stability_fee_mocks.MockPitFileStabilityFeeConverter{},
+			Repository: repository,
+		}
+
+		err := transformer.Execute()
+
+		Expect(err).NotTo(HaveOccurred())
+		Expect(repository.PassedStartingBlockNumber).To(Equal(pit_file.PitFileConfig.StartingBlockNumber))
+		Expect(repository.PassedEndingBlockNumber).To(Equal(pit_file.PitFileConfig.EndingBlockNumber))
+	})
+
+	It("returns error if repository returns error for missing headers", func() {
+		repository := &stability_fee_mocks.MockPitFileStabilityFeeRepository{}
+		repository.SetMissingHeadersErr(fakes.FakeError)
+		transformer := stability_fee.PitFileStabilityFeeTransformer{
+			Fetcher:    &mocks.MockLogFetcher{},
+			Converter:  &stability_fee_mocks.MockPitFileStabilityFeeConverter{},
+			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 := &stability_fee_mocks.MockPitFileStabilityFeeRepository{}
+		repository.SetMissingHeaders([]core.Header{{BlockNumber: 1}, {BlockNumber: 2}})
+		transformer := stability_fee.PitFileStabilityFeeTransformer{
+			Fetcher:    fetcher,
+			Converter:  &stability_fee_mocks.MockPitFileStabilityFeeConverter{},
+			Repository: repository,
+		}
+
+		err := transformer.Execute()
+
+		Expect(err).NotTo(HaveOccurred())
+		Expect(fetcher.FetchedBlocks).To(Equal([]int64{1, 2}))
+		Expect(fetcher.FetchedContractAddress).To(Equal(pit_file.PitFileConfig.ContractAddress))
+		Expect(fetcher.FetchedTopics).To(Equal([][]common.Hash{{common.HexToHash(shared.PitFileStabilityFeeSignature)}}))
+	})
+
+	It("returns error if fetcher returns error", func() {
+		fetcher := &mocks.MockLogFetcher{}
+		fetcher.SetFetcherError(fakes.FakeError)
+		repository := &stability_fee_mocks.MockPitFileStabilityFeeRepository{}
+		repository.SetMissingHeaders([]core.Header{{BlockNumber: 1}})
+		transformer := stability_fee.PitFileStabilityFeeTransformer{
+			Fetcher:    fetcher,
+			Converter:  &stability_fee_mocks.MockPitFileStabilityFeeConverter{},
+			Repository: repository,
+		}
+
+		err := transformer.Execute()
+
+		Expect(err).To(HaveOccurred())
+		Expect(err).To(MatchError(fakes.FakeError))
+	})
+
+	It("converts matching logs", func() {
+		converter := &stability_fee_mocks.MockPitFileStabilityFeeConverter{}
+		fetcher := &mocks.MockLogFetcher{}
+		fetcher.SetFetchedLogs([]types.Log{test_data.EthPitFileStabilityFeeLog})
+		repository := &stability_fee_mocks.MockPitFileStabilityFeeRepository{}
+		repository.SetMissingHeaders([]core.Header{{BlockNumber: 1}})
+		transformer := stability_fee.PitFileStabilityFeeTransformer{
+			Fetcher:    fetcher,
+			Converter:  converter,
+			Repository: repository,
+		}
+
+		err := transformer.Execute()
+
+		Expect(err).NotTo(HaveOccurred())
+		Expect(converter.PassedContractAddress).To(Equal(pit_file.PitFileConfig.ContractAddress))
+		Expect(converter.PassedContractABI).To(Equal(pit_file.PitFileConfig.ContractAbi))
+		Expect(converter.PassedLog).To(Equal(test_data.EthPitFileStabilityFeeLog))
+	})
+
+	It("returns error if converter returns error", func() {
+		converter := &stability_fee_mocks.MockPitFileStabilityFeeConverter{}
+		converter.SetConverterError(fakes.FakeError)
+		fetcher := &mocks.MockLogFetcher{}
+		fetcher.SetFetchedLogs([]types.Log{test_data.EthPitFileStabilityFeeLog})
+		repository := &stability_fee_mocks.MockPitFileStabilityFeeRepository{}
+		repository.SetMissingHeaders([]core.Header{{BlockNumber: 1}})
+		transformer := stability_fee.PitFileStabilityFeeTransformer{
+			Fetcher:    fetcher,
+			Converter:  converter,
+			Repository: repository,
+		}
+
+		err := transformer.Execute()
+
+		Expect(err).To(HaveOccurred())
+		Expect(err).To(MatchError(fakes.FakeError))
+	})
+
+	It("persists pit file model", func() {
+		converter := &stability_fee_mocks.MockPitFileStabilityFeeConverter{}
+		fetcher := &mocks.MockLogFetcher{}
+		fetcher.SetFetchedLogs([]types.Log{test_data.EthPitFileStabilityFeeLog})
+		repository := &stability_fee_mocks.MockPitFileStabilityFeeRepository{}
+		fakeHeader := core.Header{BlockNumber: 1, Id: 2}
+		repository.SetMissingHeaders([]core.Header{fakeHeader})
+		transformer := stability_fee.PitFileStabilityFeeTransformer{
+			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.PitFileStabilityFeeModel))
+	})
+
+	It("returns error if repository returns error for create", func() {
+		converter := &stability_fee_mocks.MockPitFileStabilityFeeConverter{}
+		fetcher := &mocks.MockLogFetcher{}
+		fetcher.SetFetchedLogs([]types.Log{test_data.EthPitFileStabilityFeeLog})
+		repository := &stability_fee_mocks.MockPitFileStabilityFeeRepository{}
+		repository.SetMissingHeaders([]core.Header{{BlockNumber: 1, Id: 2}})
+		repository.SetCreateError(fakes.FakeError)
+		transformer := stability_fee.PitFileStabilityFeeTransformer{
+			Fetcher:    fetcher,
+			Converter:  converter,
+			Repository: repository,
+		}
+
+		err := transformer.Execute()
+
+		Expect(err).To(HaveOccurred())
+		Expect(err).To(MatchError(fakes.FakeError))
+	})
+})