Combine price feed transformers

- fetches logs from all three price feeds in one query
- assumes eth/usd price feed will be updated to include LogValue event
- updates transformers to run separate from header sync

pkg/transformers/flip_kick/config.go

@@ -14,16 +14,10 @@
 
 package flip_kick
 
-type TransformerConfig struct {
-	ContractAddress     string
-	ContractAbi         string
-	Topics              []string
-	StartingBlockNumber int64
-	EndingBlockNumber   int64
-}
+import "github.com/vulcanize/vulcanizedb/pkg/transformers/shared"
 
-var FlipKickConfig = TransformerConfig{
-	ContractAddress:     "0x08cb6176addcca2e1d1ffe21bee464b72ee4cd8d", //this is a temporary address deployed locally
+var FlipKickConfig = shared.TransformerConfig{
+	ContractAddresses:   "0x08cb6176addcca2e1d1ffe21bee464b72ee4cd8d", //this is a temporary address deployed locally
 	ContractAbi:         FlipperABI,
 	Topics:              []string{FlipKickSignature},
 	StartingBlockNumber: 0,

pkg/transformers/flip_kick/transformer.go

@@ -30,11 +30,11 @@ type FlipKickTransformer struct {
 	Fetcher    shared.LogFetcher
 	Converter  Converter
 	Repository Repository
-	Config     TransformerConfig
+	Config     shared.TransformerConfig
 }
 
 type FlipKickTransformerInitializer struct {
-	Config TransformerConfig
+	Config shared.TransformerConfig
 }
 
 func (i FlipKickTransformerInitializer) NewFlipKickTransformer(db *postgres.DB, blockChain core.BlockChain) shared.Transformer {
@@ -50,7 +50,7 @@ func (i FlipKickTransformerInitializer) NewFlipKickTransformer(db *postgres.DB,
 	return transformer
 }
 
-func (fkt *FlipKickTransformer) SetConfig(config TransformerConfig) {
+func (fkt *FlipKickTransformer) SetConfig(config shared.TransformerConfig) {
 	fkt.Config = config
 }
 
@@ -91,13 +91,13 @@ func (fkt FlipKickTransformer) Execute() error {
 	log.Printf("Fetching event logs for %d headers \n", len(headers))
 	var resultingErrors []error
 	for _, header := range headers {
-		ethLogs, err := fkt.Fetcher.FetchLogs(config.ContractAddress, topics, header.BlockNumber)
+		ethLogs, err := fkt.Fetcher.FetchLogs(config.ContractAddresses, topics, header.BlockNumber)
 		if err != nil {
 			resultingErrors = append(resultingErrors, newTransformerError(err, header.BlockNumber, FetcherError))
 		}
 
 		for _, ethLog := range ethLogs {
-			entity, err := fkt.Converter.ToEntity(config.ContractAddress, config.ContractAbi, ethLog)
+			entity, err := fkt.Converter.ToEntity(config.ContractAddresses, config.ContractAbi, ethLog)
 			if err != nil {
 				resultingErrors = append(resultingErrors, newTransformerError(err, header.BlockNumber, LogToEntityError))
 			}

pkg/transformers/flip_kick/transformer_test.go

@@ -25,6 +25,7 @@ import (
 	"github.com/vulcanize/vulcanizedb/pkg/core"
 	"github.com/vulcanize/vulcanizedb/pkg/fakes"
 	"github.com/vulcanize/vulcanizedb/pkg/transformers/flip_kick"
+	"github.com/vulcanize/vulcanizedb/pkg/transformers/shared"
 	"github.com/vulcanize/vulcanizedb/pkg/transformers/test_data"
 	"github.com/vulcanize/vulcanizedb/pkg/transformers/test_data/mocks"
 	flip_kick_mocks "github.com/vulcanize/vulcanizedb/pkg/transformers/test_data/mocks/flip_kick"
@@ -35,7 +36,7 @@ var _ = Describe("FlipKick Transformer", func() {
 	var fetcher mocks.MockLogFetcher
 	var converter flip_kick_mocks.MockFlipKickConverter
 	var repository flip_kick_mocks.MockFlipKickRepository
-	var testConfig flip_kick.TransformerConfig
+	var testConfig shared.TransformerConfig
 	var blockNumber int64
 	var headerId int64
 	var headers []core.Header
@@ -52,8 +53,8 @@ var _ = Describe("FlipKick Transformer", func() {
 		}
 
 		startingBlockNumber := rand.Int63()
-		testConfig = flip_kick.TransformerConfig{
-			ContractAddress:     "0x12345",
+		testConfig = shared.TransformerConfig{
+			ContractAddresses:   "0x12345",
 			ContractAbi:         "test abi",
 			Topics:              []string{flip_kick.FlipKickSignature},
 			StartingBlockNumber: startingBlockNumber,
@@ -82,7 +83,7 @@ var _ = Describe("FlipKick Transformer", func() {
 		err := transformer.Execute()
 		Expect(err).NotTo(HaveOccurred())
 
-		Expect(fetcher.FetchedContractAddress).To(Equal(testConfig.ContractAddress))
+		Expect(fetcher.FetchedContractAddress).To(Equal(testConfig.ContractAddresses))
 		Expect(fetcher.FetchedTopics).To(Equal(expectedTopics))
 		Expect(fetcher.FetchedBlocks).To(Equal([]int64{blockNumber}))
 	})
@@ -99,7 +100,7 @@ var _ = Describe("FlipKick Transformer", func() {
 		err := transformer.Execute()
 		Expect(err).NotTo(HaveOccurred())
 
-		Expect(converter.ConverterContract).To(Equal(testConfig.ContractAddress))
+		Expect(converter.ConverterContract).To(Equal(testConfig.ContractAddresses))
 		Expect(converter.ConverterAbi).To(Equal(testConfig.ContractAbi))
 		Expect(converter.LogsToConvert).To(Equal(logs))
 		Expect(converter.EntitiesToConvert).To(Equal([]flip_kick.FlipKickEntity{test_data.FlipKickEntity}))