add crypto news

crypto/handler/crypto.go

@@ -20,6 +20,20 @@ var (
 	re = regexp.MustCompile(`\d{4}-\d{2}-\d{2}`)
 )
 
+type Article struct {
+	Title string
+	Description string
+	Url string
+	Source string
+	Date string
+}
+
+type News struct {
+	Ticker string
+	Limit int32
+	News []*Article
+}
+
 type Crypto struct {
 	Api   string
 	Key   string
@@ -76,6 +90,47 @@ func New() *Crypto {
 	}
 }
 
+func (c *Crypto) News(ctx context.Context, req *pb.NewsRequest, rsp *pb.NewsResponse) error {
+	if len(req.Symbol) <= 0 {
+		return errors.BadRequest("crypto.news", "invalid symbol")
+	}
+
+	uri := fmt.Sprintf("%snews/cryptocurrency/%s?apikey=%s", c.Api, req.Symbol, c.Key)
+
+	resp, err := http.Get(uri)
+	if err != nil {
+		logger.Errorf("Failed to get news: %v\n", err)
+		return errors.InternalServerError("crypto.news", "failed to get news")
+	}
+	defer resp.Body.Close()
+
+	b, _ := ioutil.ReadAll(resp.Body)
+
+	if resp.StatusCode != 200 {
+		logger.Errorf("Failed to get news (non 200): %d %v\n", resp.StatusCode, string(b))
+		return errors.InternalServerError("crypto.news", "failed to get news")
+	}
+
+	var respBody News
+
+	if err := json.Unmarshal(b, &respBody); err != nil {
+		logger.Errorf("Failed to unmarshal news: %v\n", err)
+		return errors.InternalServerError("crypto.news", "failed to get news")
+	}
+
+	for _, article := range respBody.News {
+		rsp.Articles = append(rsp.Articles, &pb.Article{
+			Title: article.Title,
+			Description: article.Description,
+			Url: article.Url,
+			Source: article.Source,
+			Date: article.Date,
+		})
+	}
+
+	return nil
+}
+
 func (s *Crypto) History(ctx context.Context, req *pb.HistoryRequest, rsp *pb.HistoryResponse) error {
 	if len(req.Symbol) <= 0 {
 		return errors.BadRequest("crypto.history", "invalid symbol")

crypto/proto/crypto.pb.go

@@ -20,6 +20,196 @@ const (
 	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
 )
 
+type Article struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// title of the article
+	Title string `protobuf:"bytes,1,opt,name=title,proto3" json:"title,omitempty"`
+	// its description
+	Description string `protobuf:"bytes,2,opt,name=description,proto3" json:"description,omitempty"`
+	// the source url
+	Url string `protobuf:"bytes,3,opt,name=url,proto3" json:"url,omitempty"`
+	// the date published
+	Date string `protobuf:"bytes,4,opt,name=date,proto3" json:"date,omitempty"`
+	// the source
+	Source string `protobuf:"bytes,5,opt,name=source,proto3" json:"source,omitempty"`
+}
+
+func (x *Article) Reset() {
+	*x = Article{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_proto_crypto_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *Article) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Article) ProtoMessage() {}
+
+func (x *Article) ProtoReflect() protoreflect.Message {
+	mi := &file_proto_crypto_proto_msgTypes[0]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Article.ProtoReflect.Descriptor instead.
+func (*Article) Descriptor() ([]byte, []int) {
+	return file_proto_crypto_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *Article) GetTitle() string {
+	if x != nil {
+		return x.Title
+	}
+	return ""
+}
+
+func (x *Article) GetDescription() string {
+	if x != nil {
+		return x.Description
+	}
+	return ""
+}
+
+func (x *Article) GetUrl() string {
+	if x != nil {
+		return x.Url
+	}
+	return ""
+}
+
+func (x *Article) GetDate() string {
+	if x != nil {
+		return x.Date
+	}
+	return ""
+}
+
+func (x *Article) GetSource() string {
+	if x != nil {
+		return x.Source
+	}
+	return ""
+}
+
+// Get news related to a currency
+type NewsRequest struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// cryptocurrency to request news for e.g BTC
+	Symbol string `protobuf:"bytes,1,opt,name=symbol,proto3" json:"symbol,omitempty"`
+}
+
+func (x *NewsRequest) Reset() {
+	*x = NewsRequest{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_proto_crypto_proto_msgTypes[1]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *NewsRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*NewsRequest) ProtoMessage() {}
+
+func (x *NewsRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_proto_crypto_proto_msgTypes[1]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use NewsRequest.ProtoReflect.Descriptor instead.
+func (*NewsRequest) Descriptor() ([]byte, []int) {
+	return file_proto_crypto_proto_rawDescGZIP(), []int{1}
+}
+
+func (x *NewsRequest) GetSymbol() string {
+	if x != nil {
+		return x.Symbol
+	}
+	return ""
+}
+
+type NewsResponse struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// symbol requested for
+	Symbol string `protobuf:"bytes,1,opt,name=symbol,proto3" json:"symbol,omitempty"`
+	// list of articles
+	Articles []*Article `protobuf:"bytes,2,rep,name=articles,proto3" json:"articles,omitempty"`
+}
+
+func (x *NewsResponse) Reset() {
+	*x = NewsResponse{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_proto_crypto_proto_msgTypes[2]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *NewsResponse) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*NewsResponse) ProtoMessage() {}
+
+func (x *NewsResponse) ProtoReflect() protoreflect.Message {
+	mi := &file_proto_crypto_proto_msgTypes[2]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use NewsResponse.ProtoReflect.Descriptor instead.
+func (*NewsResponse) Descriptor() ([]byte, []int) {
+	return file_proto_crypto_proto_rawDescGZIP(), []int{2}
+}
+
+func (x *NewsResponse) GetSymbol() string {
+	if x != nil {
+		return x.Symbol
+	}
+	return ""
+}
+
+func (x *NewsResponse) GetArticles() []*Article {
+	if x != nil {
+		return x.Articles
+	}
+	return nil
+}
+
 // Get the last price for a given crypto ticker
 type PriceRequest struct {
 	state         protoimpl.MessageState
@@ -33,7 +223,7 @@ type PriceRequest struct {
 func (x *PriceRequest) Reset() {
 	*x = PriceRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_proto_crypto_proto_msgTypes[0]
+		mi := &file_proto_crypto_proto_msgTypes[3]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -46,7 +236,7 @@ func (x *PriceRequest) String() string {
 func (*PriceRequest) ProtoMessage() {}
 
 func (x *PriceRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_proto_crypto_proto_msgTypes[0]
+	mi := &file_proto_crypto_proto_msgTypes[3]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -59,7 +249,7 @@ func (x *PriceRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use PriceRequest.ProtoReflect.Descriptor instead.
 func (*PriceRequest) Descriptor() ([]byte, []int) {
-	return file_proto_crypto_proto_rawDescGZIP(), []int{0}
+	return file_proto_crypto_proto_rawDescGZIP(), []int{3}
 }
 
 func (x *PriceRequest) GetSymbol() string {
@@ -83,7 +273,7 @@ type PriceResponse struct {
 func (x *PriceResponse) Reset() {
 	*x = PriceResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_proto_crypto_proto_msgTypes[1]
+		mi := &file_proto_crypto_proto_msgTypes[4]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -96,7 +286,7 @@ func (x *PriceResponse) String() string {
 func (*PriceResponse) ProtoMessage() {}
 
 func (x *PriceResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_proto_crypto_proto_msgTypes[1]
+	mi := &file_proto_crypto_proto_msgTypes[4]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -109,7 +299,7 @@ func (x *PriceResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use PriceResponse.ProtoReflect.Descriptor instead.
 func (*PriceResponse) Descriptor() ([]byte, []int) {
-	return file_proto_crypto_proto_rawDescGZIP(), []int{1}
+	return file_proto_crypto_proto_rawDescGZIP(), []int{4}
 }
 
 func (x *PriceResponse) GetSymbol() string {
@@ -139,7 +329,7 @@ type QuoteRequest struct {
 func (x *QuoteRequest) Reset() {
 	*x = QuoteRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_proto_crypto_proto_msgTypes[2]
+		mi := &file_proto_crypto_proto_msgTypes[5]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -152,7 +342,7 @@ func (x *QuoteRequest) String() string {
 func (*QuoteRequest) ProtoMessage() {}
 
 func (x *QuoteRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_proto_crypto_proto_msgTypes[2]
+	mi := &file_proto_crypto_proto_msgTypes[5]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -165,7 +355,7 @@ func (x *QuoteRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use QuoteRequest.ProtoReflect.Descriptor instead.
 func (*QuoteRequest) Descriptor() ([]byte, []int) {
-	return file_proto_crypto_proto_rawDescGZIP(), []int{2}
+	return file_proto_crypto_proto_rawDescGZIP(), []int{5}
 }
 
 func (x *QuoteRequest) GetSymbol() string {
@@ -197,7 +387,7 @@ type QuoteResponse struct {
 func (x *QuoteResponse) Reset() {
 	*x = QuoteResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_proto_crypto_proto_msgTypes[3]
+		mi := &file_proto_crypto_proto_msgTypes[6]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -210,7 +400,7 @@ func (x *QuoteResponse) String() string {
 func (*QuoteResponse) ProtoMessage() {}
 
 func (x *QuoteResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_proto_crypto_proto_msgTypes[3]
+	mi := &file_proto_crypto_proto_msgTypes[6]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -223,7 +413,7 @@ func (x *QuoteResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use QuoteResponse.ProtoReflect.Descriptor instead.
 func (*QuoteResponse) Descriptor() ([]byte, []int) {
-	return file_proto_crypto_proto_rawDescGZIP(), []int{3}
+	return file_proto_crypto_proto_rawDescGZIP(), []int{6}
 }
 
 func (x *QuoteResponse) GetSymbol() string {
@@ -281,7 +471,7 @@ type HistoryRequest struct {
 func (x *HistoryRequest) Reset() {
 	*x = HistoryRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_proto_crypto_proto_msgTypes[4]
+		mi := &file_proto_crypto_proto_msgTypes[7]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -294,7 +484,7 @@ func (x *HistoryRequest) String() string {
 func (*HistoryRequest) ProtoMessage() {}
 
 func (x *HistoryRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_proto_crypto_proto_msgTypes[4]
+	mi := &file_proto_crypto_proto_msgTypes[7]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -307,7 +497,7 @@ func (x *HistoryRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use HistoryRequest.ProtoReflect.Descriptor instead.
 func (*HistoryRequest) Descriptor() ([]byte, []int) {
-	return file_proto_crypto_proto_rawDescGZIP(), []int{4}
+	return file_proto_crypto_proto_rawDescGZIP(), []int{7}
 }
 
 func (x *HistoryRequest) GetSymbol() string {
@@ -341,7 +531,7 @@ type HistoryResponse struct {
 func (x *HistoryResponse) Reset() {
 	*x = HistoryResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_proto_crypto_proto_msgTypes[5]
+		mi := &file_proto_crypto_proto_msgTypes[8]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -354,7 +544,7 @@ func (x *HistoryResponse) String() string {
 func (*HistoryResponse) ProtoMessage() {}
 
 func (x *HistoryResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_proto_crypto_proto_msgTypes[5]
+	mi := &file_proto_crypto_proto_msgTypes[8]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -367,7 +557,7 @@ func (x *HistoryResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use HistoryResponse.ProtoReflect.Descriptor instead.
 func (*HistoryResponse) Descriptor() ([]byte, []int) {
-	return file_proto_crypto_proto_rawDescGZIP(), []int{5}
+	return file_proto_crypto_proto_rawDescGZIP(), []int{8}
 }
 
 func (x *HistoryResponse) GetSymbol() string {
@@ -423,54 +613,73 @@ var File_proto_crypto_proto protoreflect.FileDescriptor
 
 var file_proto_crypto_proto_rawDesc = []byte{
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+	0x74, 0x6f, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
@@ -485,27 +694,33 @@ func file_proto_crypto_proto_rawDescGZIP() []byte {
 	return file_proto_crypto_proto_rawDescData
 }
 
-var file_proto_crypto_proto_msgTypes = make([]protoimpl.MessageInfo, 6)
+var file_proto_crypto_proto_msgTypes = make([]protoimpl.MessageInfo, 9)
 var file_proto_crypto_proto_goTypes = []interface{}{
-	(*PriceRequest)(nil),    // 0: crypto.PriceRequest
+	(*Article)(nil),         // 0: crypto.Article
-	(*PriceResponse)(nil),   // 1: crypto.PriceResponse
+	(*NewsRequest)(nil),     // 1: crypto.NewsRequest
-	(*QuoteRequest)(nil),    // 2: crypto.QuoteRequest
+	(*NewsResponse)(nil),    // 2: crypto.NewsResponse
-	(*QuoteResponse)(nil),   // 3: crypto.QuoteResponse
+	(*PriceRequest)(nil),    // 3: crypto.PriceRequest
-	(*HistoryRequest)(nil),  // 4: crypto.HistoryRequest
+	(*PriceResponse)(nil),   // 4: crypto.PriceResponse
-	(*HistoryResponse)(nil), // 5: crypto.HistoryResponse
+	(*QuoteRequest)(nil),    // 5: crypto.QuoteRequest
+	(*QuoteResponse)(nil),   // 6: crypto.QuoteResponse
+	(*HistoryRequest)(nil),  // 7: crypto.HistoryRequest
+	(*HistoryResponse)(nil), // 8: crypto.HistoryResponse
 }
 var file_proto_crypto_proto_depIdxs = []int32{
-	2, // 0: crypto.Crypto.Quote:input_type -> crypto.QuoteRequest
+	0, // 0: crypto.NewsResponse.articles:type_name -> crypto.Article
-	0, // 1: crypto.Crypto.Price:input_type -> crypto.PriceRequest
+	1, // 1: crypto.Crypto.News:input_type -> crypto.NewsRequest
-	4, // 2: crypto.Crypto.History:input_type -> crypto.HistoryRequest
+	5, // 2: crypto.Crypto.Quote:input_type -> crypto.QuoteRequest
-	3, // 3: crypto.Crypto.Quote:output_type -> crypto.QuoteResponse
+	3, // 3: crypto.Crypto.Price:input_type -> crypto.PriceRequest
-	1, // 4: crypto.Crypto.Price:output_type -> crypto.PriceResponse
+	7, // 4: crypto.Crypto.History:input_type -> crypto.HistoryRequest
-	5, // 5: crypto.Crypto.History:output_type -> crypto.HistoryResponse
+	2, // 5: crypto.Crypto.News:output_type -> crypto.NewsResponse
-	3, // [3:6] is the sub-list for method output_type
+	6, // 6: crypto.Crypto.Quote:output_type -> crypto.QuoteResponse
-	0, // [0:3] is the sub-list for method input_type
+	4, // 7: crypto.Crypto.Price:output_type -> crypto.PriceResponse
-	0, // [0:0] is the sub-list for extension type_name
+	8, // 8: crypto.Crypto.History:output_type -> crypto.HistoryResponse
-	0, // [0:0] is the sub-list for extension extendee
+	5, // [5:9] is the sub-list for method output_type
-	0, // [0:0] is the sub-list for field type_name
+	1, // [1:5] is the sub-list for method input_type
+	1, // [1:1] is the sub-list for extension type_name
+	1, // [1:1] is the sub-list for extension extendee
+	0, // [0:1] is the sub-list for field type_name
 }
 
 func init() { file_proto_crypto_proto_init() }
@@ -515,7 +730,7 @@ func file_proto_crypto_proto_init() {
 	}
 	if !protoimpl.UnsafeEnabled {
 		file_proto_crypto_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*PriceRequest); i {
+			switch v := v.(*Article); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -527,7 +742,7 @@ func file_proto_crypto_proto_init() {
 			}
 		}
 		file_proto_crypto_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*PriceResponse); i {
+			switch v := v.(*NewsRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -539,7 +754,7 @@ func file_proto_crypto_proto_init() {
 			}
 		}
 		file_proto_crypto_proto_msgTypes[2].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*QuoteRequest); i {
+			switch v := v.(*NewsResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -551,7 +766,7 @@ func file_proto_crypto_proto_init() {
 			}
 		}
 		file_proto_crypto_proto_msgTypes[3].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*QuoteResponse); i {
+			switch v := v.(*PriceRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -563,7 +778,7 @@ func file_proto_crypto_proto_init() {
 			}
 		}
 		file_proto_crypto_proto_msgTypes[4].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*HistoryRequest); i {
+			switch v := v.(*PriceResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -575,6 +790,42 @@ func file_proto_crypto_proto_init() {
 			}
 		}
 		file_proto_crypto_proto_msgTypes[5].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*QuoteRequest); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_proto_crypto_proto_msgTypes[6].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*QuoteResponse); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_proto_crypto_proto_msgTypes[7].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*HistoryRequest); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_proto_crypto_proto_msgTypes[8].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*HistoryResponse); i {
 			case 0:
 				return &v.state
@@ -593,7 +844,7 @@ func file_proto_crypto_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_proto_crypto_proto_rawDesc,
 			NumEnums:      0,
-			NumMessages:   6,
+			NumMessages:   9,
 			NumExtensions: 0,
 			NumServices:   1,
 		},

crypto/proto/crypto.pb.micro.go

@@ -42,6 +42,7 @@ func NewCryptoEndpoints() []*api.Endpoint {
 // Client API for Crypto service
 
 type CryptoService interface {
+	News(ctx context.Context, in *NewsRequest, opts ...client.CallOption) (*NewsResponse, error)
 	Quote(ctx context.Context, in *QuoteRequest, opts ...client.CallOption) (*QuoteResponse, error)
 	Price(ctx context.Context, in *PriceRequest, opts ...client.CallOption) (*PriceResponse, error)
 	History(ctx context.Context, in *HistoryRequest, opts ...client.CallOption) (*HistoryResponse, error)
@@ -59,6 +60,16 @@ func NewCryptoService(name string, c client.Client) CryptoService {
 	}
 }
 
+func (c *cryptoService) News(ctx context.Context, in *NewsRequest, opts ...client.CallOption) (*NewsResponse, error) {
+	req := c.c.NewRequest(c.name, "Crypto.News", in)
+	out := new(NewsResponse)
+	err := c.c.Call(ctx, req, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
 func (c *cryptoService) Quote(ctx context.Context, in *QuoteRequest, opts ...client.CallOption) (*QuoteResponse, error) {
 	req := c.c.NewRequest(c.name, "Crypto.Quote", in)
 	out := new(QuoteResponse)
@@ -92,6 +103,7 @@ func (c *cryptoService) History(ctx context.Context, in *HistoryRequest, opts ..
 // Server API for Crypto service
 
 type CryptoHandler interface {
+	News(context.Context, *NewsRequest, *NewsResponse) error
 	Quote(context.Context, *QuoteRequest, *QuoteResponse) error
 	Price(context.Context, *PriceRequest, *PriceResponse) error
 	History(context.Context, *HistoryRequest, *HistoryResponse) error
@@ -99,6 +111,7 @@ type CryptoHandler interface {
 
 func RegisterCryptoHandler(s server.Server, hdlr CryptoHandler, opts ...server.HandlerOption) error {
 	type crypto interface {
+		News(ctx context.Context, in *NewsRequest, out *NewsResponse) error
 		Quote(ctx context.Context, in *QuoteRequest, out *QuoteResponse) error
 		Price(ctx context.Context, in *PriceRequest, out *PriceResponse) error
 		History(ctx context.Context, in *HistoryRequest, out *HistoryResponse) error
@@ -114,6 +127,10 @@ type cryptoHandler struct {
 	CryptoHandler
 }
 
+func (h *cryptoHandler) News(ctx context.Context, in *NewsRequest, out *NewsResponse) error {
+	return h.CryptoHandler.News(ctx, in, out)
+}
+
 func (h *cryptoHandler) Quote(ctx context.Context, in *QuoteRequest, out *QuoteResponse) error {
 	return h.CryptoHandler.Quote(ctx, in, out)
 }

crypto/proto/crypto.proto

@@ -5,11 +5,38 @@ package crypto;
 option go_package = "./proto;crypto";
 
 service Crypto {
+	rpc News(NewsRequest) returns (NewsResponse) {}
 	rpc Quote(QuoteRequest) returns (QuoteResponse) {}
 	rpc Price(PriceRequest) returns (PriceResponse) {}
 	rpc History(HistoryRequest) returns (HistoryResponse) {}
 }
 
+message Article {
+	// title of the article
+	string title = 1;
+	// its description	
+	string description = 2;
+	// the source url
+	string url = 3;
+	// the date published
+	string date = 4;
+	// the source
+	string source = 5;
+}
+
+// Get news related to a currency
+message NewsRequest {
+	// cryptocurrency ticker to request news for e.g BTC
+	string symbol = 1;
+}
+
+message NewsResponse {
+	// symbol requested for
+	string symbol = 1;
+	// list of articles
+	repeated Article articles = 2;
+}
+
 // Get the last price for a given crypto ticker
 message PriceRequest {
 	// crypto symbol e.g BTCUSD