Flop deal (#39)

*Refactor deal transformer to take in several contract addresses
* Add flop address to deal transformer

pkg/transformers/drip_drip/config.go

@@ -17,7 +17,7 @@ package drip_drip
 import "github.com/vulcanize/vulcanizedb/pkg/transformers/shared"
 
 var DripDripConfig = shared.TransformerConfig{
-	ContractAddress:     shared.DripContractAddress,
+	ContractAddresses:   []string{shared.DripContractAddress},
 	ContractAbi:         shared.DripABI,
 	Topics:              []string{shared.DripDripSignature},
 	StartingBlockNumber: 0,

pkg/transformers/drip_drip/transformer.go

@@ -55,7 +55,7 @@ func (transformer DripDripTransformer) Execute() error {
 	log.Printf("Fetching drip drip event logs for %d headers \n", len(missingHeaders))
 	for _, header := range missingHeaders {
 		topics := [][]common.Hash{{common.HexToHash(shared.DripDripSignature)}}
-		matchingLogs, err := transformer.Fetcher.FetchLogs(transformer.Config.ContractAddress, topics, header.BlockNumber)
+		matchingLogs, err := transformer.Fetcher.FetchLogs(transformer.Config.ContractAddresses, topics, header.BlockNumber)
 		if err != nil {
 			return err
 		}

pkg/transformers/drip_drip/transformer_test.go

@@ -76,7 +76,7 @@ var _ = Describe("Drip drip transformer", func() {
 
 		Expect(err).NotTo(HaveOccurred())
 		Expect(fetcher.FetchedBlocks).To(Equal([]int64{1, 2}))
-		Expect(fetcher.FetchedContractAddress).To(Equal(drip_drip.DripDripConfig.ContractAddress))
+		Expect(fetcher.FetchedContractAddresses).To(Equal([][]string{drip_drip.DripDripConfig.ContractAddresses, drip_drip.DripDripConfig.ContractAddresses}))
 		Expect(fetcher.FetchedTopics).To(Equal([][]common.Hash{{common.HexToHash(shared.DripDripSignature)}}))
 	})