Flop deal (#39)

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

pkg/transformers/vat_init/config.go

@@ -19,7 +19,7 @@ import (
 )
 
 var VatInitConfig = shared.TransformerConfig{
-	ContractAddress:     shared.VatContractAddress,
+	ContractAddresses:   []string{shared.VatContractAddress},
 	ContractAbi:         shared.VatABI,
 	Topics:              []string{shared.VatInitSignature},
 	StartingBlockNumber: 0,

pkg/transformers/vat_init/transformer.go

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

pkg/transformers/vat_init/transformer_test.go

@@ -75,7 +75,7 @@ var _ = Describe("Vat init transformer", func() {
 
 		Expect(err).NotTo(HaveOccurred())
 		Expect(fetcher.FetchedBlocks).To(Equal([]int64{1, 2}))
-		Expect(fetcher.FetchedContractAddress).To(Equal(vat_init.VatInitConfig.ContractAddress))
+		Expect(fetcher.FetchedContractAddresses).To(Equal([][]string{vat_init.VatInitConfig.ContractAddresses, vat_init.VatInitConfig.ContractAddresses}))
 		Expect(fetcher.FetchedTopics).To(Equal([][]common.Hash{{common.HexToHash(shared.VatInitSignature)}}))
 	})