rpc: add ability to answer as C# with block as []byte

pkg/rpc/server.go

@@ -152,7 +152,14 @@ Methods:
 			break
 		}
 
+		if len(reqParams) == 2 && reqParams[1].Value == 1 {
 			results = wrappers.NewBlock(block, s.chain)
+		} else {
+			writer := io.NewBufBinWriter()
+			block.EncodeBinary(writer.BinWriter)
+			results = hex.EncodeToString(writer.Bytes())
+		}
+
 	case "getblockcount":
 		getblockcountCalled.Inc()
 		results = s.chain.BlockHeight() + 1

pkg/rpc/server_test.go

@@ -108,7 +108,7 @@ var rpcTestCases = map[string][]rpcTestCase{
 	"getblock": {
 		{
 			name:   "positive",
-			params: "[1]",
+			params: "[1, 1]",
 			result: func(e *executor) interface{} { return &GetBlockResponse{} },
 			check: func(t *testing.T, e *executor, result interface{}) {
 				res, ok := result.(*GetBlockResponse)