Refactor stability_fee transfomer

pkg/transformers/pit_file/stability_fee/config.go

@@ -0,0 +1,28 @@
+// 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 stability_fee
+
+import (
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/shared"
+)
+
+var StabilityFeeFileConfig = shared.TransformerConfig{
+	TransformerName:     "stability fee",
+	ContractAddresses:   []string{shared.PitContractAddress},
+	ContractAbi:         shared.PitABI,
+	Topics:              []string{shared.PitFileStabilityFeeSignature},
+	StartingBlockNumber: 0,
+	EndingBlockNumber:   10000000,
+}

pkg/transformers/pit_file/stability_fee/converter.go

@@ -23,14 +23,10 @@ import (
 	"github.com/ethereum/go-ethereum/core/types"
 )
 
-type Converter interface {
-	ToModels(ethLogs []types.Log) ([]PitFileStabilityFeeModel, error)
-}
-
 type PitFileStabilityFeeConverter struct{}
 
-func (PitFileStabilityFeeConverter) ToModels(ethLogs []types.Log) ([]PitFileStabilityFeeModel, error) {
+func (PitFileStabilityFeeConverter) ToModels(ethLogs []types.Log) ([]interface{}, error) {
-	var models []PitFileStabilityFeeModel
+	var models []interface{}
 	for _, ethLog := range ethLogs {
 		err := verifyLog(ethLog)
 		if err != nil {

pkg/transformers/pit_file/stability_fee/repository.go

@@ -19,51 +19,46 @@ import (
 	"github.com/vulcanize/vulcanizedb/pkg/datastore/postgres"
 )
 
-type Repository interface {
-	Create(headerID int64, models []PitFileStabilityFeeModel) error
-	MarkHeaderChecked(headerID int64) error
-	MissingHeaders(startingBlockNumber, endingBlockNumber int64) ([]core.Header, error)
-}
-
 type PitFileStabilityFeeRepository struct {
-	db *postgres.DB
+	DB *postgres.DB
 }
 
-func NewPitFileStabilityFeeRepository(db *postgres.DB) PitFileStabilityFeeRepository {
+func (repository PitFileStabilityFeeRepository) Create(headerID int64, models []interface{}) error {
-	return PitFileStabilityFeeRepository{
+	tx, err := repository.DB.Begin()
-		db: db,
-	}
-}
-
-func (repository PitFileStabilityFeeRepository) Create(headerID int64, models []PitFileStabilityFeeModel) error {
-	tx, err := repository.db.Begin()
 	if err != nil {
 		return err
 	}
+
+	var pitFileSF PitFileStabilityFeeModel
 	for _, model := range models {
+		pitFileSF = model.(PitFileStabilityFeeModel)
 		_, err = tx.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,
+			headerID, pitFileSF.What, pitFileSF.Data, pitFileSF.TransactionIndex, pitFileSF.Raw,
 		)
+
 		if err != nil {
 			tx.Rollback()
 			return err
 		}
 	}
+
 	_, err = tx.Exec(`INSERT INTO public.checked_headers (header_id, pit_file_stability_fee_checked)
 		VALUES ($1, $2) 
 	ON CONFLICT (header_id) DO
 		UPDATE SET pit_file_stability_fee_checked = $2`, headerID, true)
+
 	if err != nil {
 		tx.Rollback()
 		return err
 	}
+
 	return tx.Commit()
 }
 
 func (repository PitFileStabilityFeeRepository) MarkHeaderChecked(headerID int64) error {
-	_, err := repository.db.Exec(`INSERT INTO public.checked_headers (header_id, pit_file_stability_fee_checked)
+	_, err := repository.DB.Exec(`INSERT INTO public.checked_headers (header_id, pit_file_stability_fee_checked)
 		VALUES ($1, $2) 
 	ON CONFLICT (header_id) DO
 		UPDATE SET pit_file_stability_fee_checked = $2`, headerID, true)
@@ -72,7 +67,7 @@ func (repository PitFileStabilityFeeRepository) MarkHeaderChecked(headerID int64
 
 func (repository PitFileStabilityFeeRepository) MissingHeaders(startingBlockNumber, endingBlockNumber int64) ([]core.Header, error) {
 	var result []core.Header
-	err := repository.db.Select(
+	err := repository.DB.Select(
 		&result,
 		`SELECT headers.id, headers.block_number FROM headers
                LEFT JOIN checked_headers on headers.id = header_id
@@ -82,7 +77,11 @@ func (repository PitFileStabilityFeeRepository) MissingHeaders(startingBlockNumb
                AND headers.eth_node_fingerprint = $3`,
 		startingBlockNumber,
 		endingBlockNumber,
-		repository.db.Node.ID,
+		repository.DB.Node.ID,
 	)
 	return result, err
 }
+
+func (repository *PitFileStabilityFeeRepository) SetDB(db *postgres.DB) {
+	repository.DB = db
+}

pkg/transformers/pit_file/stability_fee/transformer.go

@@ -1,79 +0,0 @@
-// 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 stability_fee
-
-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/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
-	}
-	log.Printf("Fetching pit file stability fee event logs for %d headers \n", len(missingHeaders))
-	for _, header := range missingHeaders {
-		topics := [][]common.Hash{{common.HexToHash(shared.PitFileStabilityFeeSignature)}}
-		matchingLogs, err := transformer.Fetcher.FetchLogs(pit_file.PitFileConfig.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/transformers.go

@@ -68,9 +68,15 @@ var (
 	pitFileConfig                             = pit_file.PitFileConfig
 	PitFileDebtCeilingTransformerInitializer  = debt_ceiling.PitFileDebtCeilingTransformerInitializer{Config: pitFileConfig}.NewPitFileDebtCeilingTransformer
 	PitFileIlkTransformerInitializer          = ilk.PitFileIlkTransformerInitializer{Config: pitFileConfig}.NewPitFileIlkTransformer
-	PitFileStabilityFeeTransformerInitializer = stability_fee.PitFileStabilityFeeTransformerInitializer{Config: pitFileConfig}.NewPitFileStabilityFeeTransformer
 	PriceFeedTransformerInitializer           = price_feeds.PriceFeedTransformerInitializer{Config: price_feeds.PriceFeedConfig}.NewPriceFeedTransformer
 	VatGrabTransformerInitializer             = vat_grab.VatGrabTransformerInitializer{Config: vat_grab.VatGrabConfig}.NewVatGrabTransformer
+	PitFileStabilityFeeTransformerInitializer = factories.Transformer{
+		Config:     stability_fee.StabilityFeeFileConfig,
+		Converter:  &stability_fee.PitFileStabilityFeeConverter{},
+		Repository: &stability_fee.PitFileStabilityFeeRepository{},
+		Fetcher:    &shared.Fetcher{},
+	}.NewTransformer
+
 	TendTransformerInitializer      = factories.Transformer{
 		Config:     tend.TendConfig,
 		Converter:  &tend.TendConverter{},