Watch contact updates (#127)

* Downcase all arguments for contact watching

* ABI retrieval from test networks

pkg/geth/abi.go

@@ -38,6 +38,19 @@ func NewEtherScanClient(url string) *EtherScanApi {
 
 }
 
+func GenUrl(network string) string {
+	switch network {
+	case "ropsten":
+		return "https://ropsten.etherscan.io"
+	case "kovan":
+		return "https://kovan.etherscan.io"
+	case "rinkeby":
+		return "https://rinkeby.etherscan.io"
+	default:
+		return "https://api.etherscan.io"
+	}
+}
+
 //https://api.etherscan.io/api?module=contract&action=getabi&address=%s
 func (e *EtherScanApi) GetAbi(contractHash string) (string, error) {
 	target := new(Response)

pkg/geth/abi_test.go

@@ -101,5 +101,22 @@ var _ = Describe("ABI files", func() {
 				})
 			})
 		})
+
+		Describe("Generating etherscan endpoints based on network", func() {
+			It("should return the main endpoint as the default", func() {
+				url := geth.GenUrl("")
+				Expect(url).To(Equal("https://api.etherscan.io"))
+			})
+
+			It("generates various test network endpoint if test network is supplied", func() {
+				ropstenUrl := geth.GenUrl("ropsten")
+				rinkebyUrl := geth.GenUrl("rinkeby")
+				kovanUrl := geth.GenUrl("kovan")
+
+				Expect(ropstenUrl).To(Equal("https://ropsten.etherscan.io"))
+				Expect(kovanUrl).To(Equal("https://kovan.etherscan.io"))
+				Expect(rinkebyUrl).To(Equal("https://rinkeby.etherscan.io"))
+			})
+		})
 	})
 })

pkg/geth/block_to_core_block.go

@@ -25,7 +25,7 @@ func ToCoreBlock(gethBlock *types.Block, client GethClient) core.Block {
 		GasLimit:     gethBlock.GasLimit().Int64(),
 		GasUsed:      gethBlock.GasUsed().Int64(),
 		Hash:         gethBlock.Hash().Hex(),
-		Miner:        gethBlock.Coinbase().Hex(),
+		Miner:        strings.ToLower(gethBlock.Coinbase().Hex()),
 		Nonce:        hexutil.Encode(gethBlock.Header().Nonce[:]),
 		Number:       gethBlock.Number().Int64(),
 		ParentHash:   gethBlock.ParentHash().Hex(),