Merge pull request #3365 from murgatroid99/node_nan_2.0

Update to nan 2.0

src/node/binding.gyp

@@ -8,7 +8,6 @@
         '-std=c++0x',
         '-Wall',
         '-pthread',
-        '-pedantic',
         '-g',
         '-zdefs',
         '-Werror',

src/node/ext/byte_buffer.cc

@@ -44,15 +44,16 @@
 namespace grpc {
 namespace node {
 
+
 using v8::Context;
 using v8::Function;
-using v8::Handle;
+using v8::Local;
 using v8::Object;
 using v8::Number;
 using v8::Value;
 
-grpc_byte_buffer *BufferToByteBuffer(Handle<Value> buffer) {
-  NanScope();
+grpc_byte_buffer *BufferToByteBuffer(Local<Value> buffer) {
+  Nan::HandleScope scope;
   int length = ::node::Buffer::Length(buffer);
   char *data = ::node::Buffer::Data(buffer);
   gpr_slice slice = gpr_slice_malloc(length);
@@ -62,10 +63,10 @@ grpc_byte_buffer *BufferToByteBuffer(Handle<Value> buffer) {
   return byte_buffer;
 }
 
-Handle<Value> ByteBufferToBuffer(grpc_byte_buffer *buffer) {
-  NanEscapableScope();
+Local<Value> ByteBufferToBuffer(grpc_byte_buffer *buffer) {
+  Nan::EscapableHandleScope scope;
   if (buffer == NULL) {
-    return NanEscapeScope(NanNull());
+    return scope.Escape(Nan::Null());
   }
   size_t length = grpc_byte_buffer_length(buffer);
   char *result = reinterpret_cast<char *>(calloc(length, sizeof(char)));
@@ -77,21 +78,22 @@ Handle<Value> ByteBufferToBuffer(grpc_byte_buffer *buffer) {
     memcpy(result + offset, GPR_SLICE_START_PTR(next), GPR_SLICE_LENGTH(next));
     offset += GPR_SLICE_LENGTH(next);
   }
-  return NanEscapeScope(MakeFastBuffer(NanBufferUse(result, length)));
+  return scope.Escape(MakeFastBuffer(
+      Nan::NewBuffer(result, length).ToLocalChecked()));
 }
 
-Handle<Value> MakeFastBuffer(Handle<Value> slowBuffer) {
-  NanEscapableScope();
-  Handle<Object> globalObj = NanGetCurrentContext()->Global();
-  Handle<Function> bufferConstructor = Handle<Function>::Cast(
-      globalObj->Get(NanNew("Buffer")));
-  Handle<Value> consArgs[3] = {
+Local<Value> MakeFastBuffer(Local<Value> slowBuffer) {
+  Nan::EscapableHandleScope scope;
+  Local<Object> globalObj = Nan::GetCurrentContext()->Global();
+  Local<Function> bufferConstructor = Local<Function>::Cast(
+      globalObj->Get(Nan::New("Buffer").ToLocalChecked()));
+  Local<Value> consArgs[3] = {
     slowBuffer,
-    NanNew<Number>(::node::Buffer::Length(slowBuffer)),
-    NanNew<Number>(0)
+    Nan::New<Number>(::node::Buffer::Length(slowBuffer)),
+    Nan::New<Number>(0)
   };
-  Handle<Object> fastBuffer = bufferConstructor->NewInstance(3, consArgs);
-  return NanEscapeScope(fastBuffer);
+  Local<Object> fastBuffer = bufferConstructor->NewInstance(3, consArgs);
+  return scope.Escape(fastBuffer);
 }
 }  // namespace node
 }  // namespace grpc

src/node/ext/byte_buffer.h

@@ -45,14 +45,14 @@ namespace node {
 
 /* Convert a Node.js Buffer to grpc_byte_buffer. Requires that
    ::node::Buffer::HasInstance(buffer) */
-grpc_byte_buffer *BufferToByteBuffer(v8::Handle<v8::Value> buffer);
+grpc_byte_buffer *BufferToByteBuffer(v8::Local<v8::Value> buffer);
 
 /* Convert a grpc_byte_buffer to a Node.js Buffer */
-v8::Handle<v8::Value> ByteBufferToBuffer(grpc_byte_buffer *buffer);
+v8::Local<v8::Value> ByteBufferToBuffer(grpc_byte_buffer *buffer);
 
 /* Convert a ::node::Buffer to a fast Buffer, as defined in the Node
    Buffer documentation */
-v8::Handle<v8::Value> MakeFastBuffer(v8::Handle<v8::Value> slowBuffer);
+v8::Local<v8::Value> MakeFastBuffer(v8::Local<v8::Value> slowBuffer);
 
 }  // namespace node
 }  // namespace grpc

src/node/ext/call.cc

@@ -54,52 +54,61 @@ using std::vector;
 namespace grpc {
 namespace node {
 
+using Nan::Callback;
+using Nan::EscapableHandleScope;
+using Nan::HandleScope;
+using Nan::Maybe;
+using Nan::MaybeLocal;
+using Nan::ObjectWrap;
+using Nan::Persistent;
+using Nan::Utf8String;
+
 using v8::Array;
 using v8::Boolean;
 using v8::Exception;
 using v8::External;
 using v8::Function;
 using v8::FunctionTemplate;
-using v8::Handle;
-using v8::HandleScope;
 using v8::Integer;
 using v8::Local;
 using v8::Number;
 using v8::Object;
 using v8::ObjectTemplate;
-using v8::Persistent;
 using v8::Uint32;
 using v8::String;
 using v8::Value;
 
-NanCallback *Call::constructor;
+Callback *Call::constructor;
 Persistent<FunctionTemplate> Call::fun_tpl;
 
 bool EndsWith(const char *str, const char *substr) {
   return strcmp(str+strlen(str)-strlen(substr), substr) == 0;
 }
 
-bool CreateMetadataArray(Handle<Object> metadata, grpc_metadata_array *array,
+bool CreateMetadataArray(Local<Object> metadata, grpc_metadata_array *array,
                          shared_ptr<Resources> resources) {
-  NanScope();
+  HandleScope scope;
   grpc_metadata_array_init(array);
-  Handle<Array> keys(metadata->GetOwnPropertyNames());
+  Local<Array> keys = Nan::GetOwnPropertyNames(metadata).ToLocalChecked();
   for (unsigned int i = 0; i < keys->Length(); i++) {
-    Handle<String> current_key(keys->Get(i)->ToString());
-    if (!metadata->Get(current_key)->IsArray()) {
+    Local<String> current_key = Nan::To<String>(
+        Nan::Get(keys, i).ToLocalChecked()).ToLocalChecked();
+    Local<Value> value_array = Nan::Get(metadata, current_key).ToLocalChecked();
+    if (!value_array->IsArray()) {
       return false;
     }
-    array->capacity += Local<Array>::Cast(metadata->Get(current_key))->Length();
+    array->capacity += Local<Array>::Cast(value_array)->Length();
   }
   array->metadata = reinterpret_cast<grpc_metadata*>(
       gpr_malloc(array->capacity * sizeof(grpc_metadata)));
   for (unsigned int i = 0; i < keys->Length(); i++) {
-    Handle<String> current_key(keys->Get(i)->ToString());
-    NanUtf8String *utf8_key = new NanUtf8String(current_key);
-    resources->strings.push_back(unique_ptr<NanUtf8String>(utf8_key));
-    Handle<Array> values = Local<Array>::Cast(metadata->Get(current_key));
+    Local<String> current_key(keys->Get(i)->ToString());
+    Utf8String *utf8_key = new Utf8String(current_key);
+    resources->strings.push_back(unique_ptr<Utf8String>(utf8_key));
+    Local<Array> values = Local<Array>::Cast(
+        Nan::Get(metadata, current_key).ToLocalChecked());
     for (unsigned int j = 0; j < values->Length(); j++) {
-      Handle<Value> value = values->Get(j);
+      Local<Value> value = Nan::Get(values, j).ToLocalChecked();
       grpc_metadata *current = &array->metadata[array->count];
       current->key = **utf8_key;
       // Only allow binary headers for "-bin" keys
@@ -107,18 +116,16 @@ bool CreateMetadataArray(Handle<Object> metadata, grpc_metadata_array *array,
         if (::node::Buffer::HasInstance(value)) {
           current->value = ::node::Buffer::Data(value);
           current->value_length = ::node::Buffer::Length(value);
-          Persistent<Value> *handle = new Persistent<Value>();
-          NanAssignPersistent(*handle, value);
-          resources->handles.push_back(unique_ptr<PersistentHolder>(
-              new PersistentHolder(handle)));
+          PersistentValue *handle = new PersistentValue(value);
+          resources->handles.push_back(unique_ptr<PersistentValue>(handle));
         } else {
           return false;
         }
       } else {
         if (value->IsString()) {
-          Handle<String> string_value = value->ToString();
-          NanUtf8String *utf8_value = new NanUtf8String(string_value);
-          resources->strings.push_back(unique_ptr<NanUtf8String>(utf8_value));
+          Local<String> string_value = Nan::To<String>(value).ToLocalChecked();
+          Utf8String *utf8_value = new Utf8String(string_value);
+          resources->strings.push_back(unique_ptr<Utf8String>(utf8_value));
           current->value = **utf8_value;
           current->value_length = string_value->Length();
         } else {
@@ -131,8 +138,8 @@ bool CreateMetadataArray(Handle<Object> metadata, grpc_metadata_array *array,
   return true;
 }
 
-Handle<Value> ParseMetadata(const grpc_metadata_array *metadata_array) {
-  NanEscapableScope();
+Local<Value> ParseMetadata(const grpc_metadata_array *metadata_array) {
+  EscapableHandleScope scope;
   grpc_metadata *metadata_elements = metadata_array->metadata;
   size_t length = metadata_array->count;
   std::map<const char*, size_t> size_map;
@@ -142,34 +149,39 @@ Handle<Value> ParseMetadata(const grpc_metadata_array *metadata_array) {
     const char *key = metadata_elements[i].key;
     if (size_map.count(key)) {
       size_map[key] += 1;
+    } else {
+      size_map[key] = 1;
     }
     index_map[key] = 0;
   }
-  Handle<Object> metadata_object = NanNew<Object>();
+  Local<Object> metadata_object = Nan::New<Object>();
   for (unsigned int i = 0; i < length; i++) {
     grpc_metadata* elem = &metadata_elements[i];
-    Handle<String> key_string = NanNew(elem->key);
-    Handle<Array> array;
-    if (metadata_object->Has(key_string)) {
-      array = Handle<Array>::Cast(metadata_object->Get(key_string));
+    Local<String> key_string = Nan::New(elem->key).ToLocalChecked();
+    Local<Array> array;
+    MaybeLocal<Value> maybe_array = Nan::Get(metadata_object, key_string);
+    if (maybe_array.IsEmpty() || !maybe_array.ToLocalChecked()->IsArray()) {
+      array = Nan::New<Array>(size_map[elem->key]);
+      Nan::Set(metadata_object, key_string, array);
     } else {
-      array = NanNew<Array>(size_map[elem->key]);
-      metadata_object->Set(key_string, array);
+      array = Local<Array>::Cast(maybe_array.ToLocalChecked());
     }
     if (EndsWith(elem->key, "-bin")) {
-      array->Set(index_map[elem->key],
-                 NanNewBufferHandle(elem->value, elem->value_length));
+      Nan::Set(array, index_map[elem->key],
+               Nan::CopyBuffer(elem->value,
+                               elem->value_length).ToLocalChecked());
     } else {
-      array->Set(index_map[elem->key], NanNew(elem->value));
+      Nan::Set(array, index_map[elem->key],
+               Nan::New(elem->value).ToLocalChecked());
     }
     index_map[elem->key] += 1;
   }
-  return NanEscapeScope(metadata_object);
+  return scope.Escape(metadata_object);
 }
 
-Handle<Value> Op::GetOpType() const {
-  NanEscapableScope();
-  return NanEscapeScope(NanNew<String>(GetTypeString()));
+Local<Value> Op::GetOpType() const {
+  EscapableHandleScope scope;
+  return scope.Escape(Nan::New(GetTypeString()).ToLocalChecked());
 }
 
 Op::~Op() {
@@ -177,17 +189,22 @@ Op::~Op() {
 
 class SendMetadataOp : public Op {
  public:
-  Handle<Value> GetNodeValue() const {
-    NanEscapableScope();
-    return NanEscapeScope(NanTrue());
+  Local<Value> GetNodeValue() const {
+    EscapableHandleScope scope;
+    return scope.Escape(Nan::True());
   }
-  bool ParseOp(Handle<Value> value, grpc_op *out,
+  bool ParseOp(Local<Value> value, grpc_op *out,
                shared_ptr<Resources> resources) {
     if (!value->IsObject()) {
       return false;
     }
     grpc_metadata_array array;
-    if (!CreateMetadataArray(value->ToObject(), &array, resources)) {
+    MaybeLocal<Object> maybe_metadata = Nan::To<Object>(value);
+    if (maybe_metadata.IsEmpty()) {
+      return false;
+    }
+    if (!CreateMetadataArray(maybe_metadata.ToLocalChecked(),
+                             &array, resources)) {
       return false;
     }
     out->data.send_initial_metadata.count = array.count;
@@ -202,27 +219,28 @@ class SendMetadataOp : public Op {
 
 class SendMessageOp : public Op {
  public:
-  Handle<Value> GetNodeValue() const {
-    NanEscapableScope();
-    return NanEscapeScope(NanTrue());
+  Local<Value> GetNodeValue() const {
+    EscapableHandleScope scope;
+    return scope.Escape(Nan::True());
   }
-  bool ParseOp(Handle<Value> value, grpc_op *out,
+  bool ParseOp(Local<Value> value, grpc_op *out,
                shared_ptr<Resources> resources) {
     if (!::node::Buffer::HasInstance(value)) {
       return false;
     }
-    Handle<Object> object_value = value->ToObject();
-    if (object_value->HasOwnProperty(NanNew("grpcWriteFlags"))) {
-      Handle<Value> flag_value = object_value->Get(NanNew("grpcWriteFlags"));
+    Local<Object> object_value = Nan::To<Object>(value).ToLocalChecked();
+    MaybeLocal<Value> maybe_flag_value = Nan::Get(
+        object_value, Nan::New("grpcWriteFlags").ToLocalChecked());
+    if (!maybe_flag_value.IsEmpty()) {
+      Local<Value> flag_value = maybe_flag_value.ToLocalChecked();
       if (flag_value->IsUint32()) {
-        out->flags = flag_value->Uint32Value() & GRPC_WRITE_USED_MASK;
+        Maybe<uint32_t> maybe_flag = Nan::To<uint32_t>(flag_value);
+        out->flags = maybe_flag.FromMaybe(0) & GRPC_WRITE_USED_MASK;
       }
     }
     out->data.send_message = BufferToByteBuffer(value);
-    Persistent<Value> *handle = new Persistent<Value>();
-    NanAssignPersistent(*handle, value);
-    resources->handles.push_back(unique_ptr<PersistentHolder>(
-        new PersistentHolder(handle)));
+    PersistentValue *handle = new PersistentValue(value);
+    resources->handles.push_back(unique_ptr<PersistentValue>(handle));
     return true;
   }
  protected:
@@ -233,11 +251,11 @@ class SendMessageOp : public Op {
 
 class SendClientCloseOp : public Op {
  public:
-  Handle<Value> GetNodeValue() const {
-    NanEscapableScope();
-    return NanEscapeScope(NanTrue());
+  Local<Value> GetNodeValue() const {
+    EscapableHandleScope scope;
+    return scope.Escape(Nan::True());
   }
-  bool ParseOp(Handle<Value> value, grpc_op *out,
+  bool ParseOp(Local<Value> value, grpc_op *out,
                shared_ptr<Resources> resources) {
     return true;
   }
@@ -249,39 +267,55 @@ class SendClientCloseOp : public Op {
 
 class SendServerStatusOp : public Op {
  public:
-  Handle<Value> GetNodeValue() const {
-    NanEscapableScope();
-    return NanEscapeScope(NanTrue());
+  Local<Value> GetNodeValue() const {
+    EscapableHandleScope scope;
+    return scope.Escape(Nan::True());
   }
-  bool ParseOp(Handle<Value> value, grpc_op *out,
+  bool ParseOp(Local<Value> value, grpc_op *out,
                shared_ptr<Resources> resources) {
     if (!value->IsObject()) {
       return false;
     }
-    Handle<Object> server_status = value->ToObject();
-    if (!server_status->Get(NanNew("metadata"))->IsObject()) {
+    Local<Object> server_status = Nan::To<Object>(value).ToLocalChecked();
+    MaybeLocal<Value> maybe_metadata = Nan::Get(
+        server_status, Nan::New("metadata").ToLocalChecked());
+    if (maybe_metadata.IsEmpty()) {
+      return false;
+    }
+    if (!maybe_metadata.ToLocalChecked()->IsObject()) {
+      return false;
+    }
+    Local<Object> metadata = Nan::To<Object>(
+        maybe_metadata.ToLocalChecked()).ToLocalChecked();
+    MaybeLocal<Value> maybe_code = Nan::Get(server_status,
+                                            Nan::New("code").ToLocalChecked());
+    if (maybe_code.IsEmpty()) {
       return false;
     }
-    if (!server_status->Get(NanNew("code"))->IsUint32()) {
+    if (!maybe_code.ToLocalChecked()->IsUint32()) {
       return false;
     }
-    if (!server_status->Get(NanNew("details"))->IsString()) {
+    uint32_t code = Nan::To<uint32_t>(maybe_code.ToLocalChecked()).FromJust();
+    MaybeLocal<Value> maybe_details = Nan::Get(
+        server_status, Nan::New("details").ToLocalChecked());
+    if (maybe_details.IsEmpty()) {
       return false;
     }
+    if (!maybe_details.ToLocalChecked()->IsString()) {
+      return false;
+    }
+    Local<String> details = Nan::To<String>(
+        maybe_details.ToLocalChecked()).ToLocalChecked();
     grpc_metadata_array array;
-    if (!CreateMetadataArray(server_status->Get(NanNew("metadata"))->
-                             ToObject(),
-                             &array, resources)) {
+    if (!CreateMetadataArray(metadata, &array, resources)) {
       return false;
     }
     out->data.send_status_from_server.trailing_metadata_count = array.count;
     out->data.send_status_from_server.trailing_metadata = array.metadata;
     out->data.send_status_from_server.status =
-        static_cast<grpc_status_code>(
-            server_status->Get(NanNew("code"))->Uint32Value());
-    NanUtf8String *str = new NanUtf8String(
-        server_status->Get(NanNew("details")));
-    resources->strings.push_back(unique_ptr<NanUtf8String>(str));
+        static_cast<grpc_status_code>(code);
+    Utf8String *str = new Utf8String(details);
+    resources->strings.push_back(unique_ptr<Utf8String>(str));
     out->data.send_status_from_server.status_details = **str;
     return true;
   }
@@ -301,12 +335,12 @@ class GetMetadataOp : public Op {
     grpc_metadata_array_destroy(&recv_metadata);
   }
 
-  Handle<Value> GetNodeValue() const {
-    NanEscapableScope();
-    return NanEscapeScope(ParseMetadata(&recv_metadata));
+  Local<Value> GetNodeValue() const {
+    EscapableHandleScope scope;
+    return scope.Escape(ParseMetadata(&recv_metadata));
   }
 
-  bool ParseOp(Handle<Value> value, grpc_op *out,
+  bool ParseOp(Local<Value> value, grpc_op *out,
                shared_ptr<Resources> resources) {
     out->data.recv_initial_metadata = &recv_metadata;
     return true;
@@ -331,12 +365,12 @@ class ReadMessageOp : public Op {
       grpc_byte_buffer_destroy(recv_message);
     }
   }
-  Handle<Value> GetNodeValue() const {
-    NanEscapableScope();
-    return NanEscapeScope(ByteBufferToBuffer(recv_message));
+  Local<Value> GetNodeValue() const {
+    EscapableHandleScope scope;
+    return scope.Escape(ByteBufferToBuffer(recv_message));
   }
 
-  bool ParseOp(Handle<Value> value, grpc_op *out,
+  bool ParseOp(Local<Value> value, grpc_op *out,
                shared_ptr<Resources> resources) {
     out->data.recv_message = &recv_message;
     return true;
@@ -364,7 +398,7 @@ class ClientStatusOp : public Op {
     gpr_free(status_details);
   }
 
-  bool ParseOp(Handle<Value> value, grpc_op *out,
+  bool ParseOp(Local<Value> value, grpc_op *out,
                shared_ptr<Resources> resources) {
     out->data.recv_status_on_client.trailing_metadata = &metadata_array;
     out->data.recv_status_on_client.status = &status;
@@ -373,15 +407,18 @@ class ClientStatusOp : public Op {
     return true;
   }
 
-  Handle<Value> GetNodeValue() const {
-    NanEscapableScope();
-    Handle<Object> status_obj = NanNew<Object>();
-    status_obj->Set(NanNew("code"), NanNew<Number>(status));
+  Local<Value> GetNodeValue() const {
+    EscapableHandleScope scope;
+    Local<Object> status_obj = Nan::New<Object>();
+    Nan::Set(status_obj, Nan::New("code").ToLocalChecked(),
+                    Nan::New<Number>(status));
     if (status_details != NULL) {
-      status_obj->Set(NanNew("details"), NanNew(status_details));
+      Nan::Set(status_obj, Nan::New("details").ToLocalChecked(),
+               Nan::New(status_details).ToLocalChecked());
     }
-    status_obj->Set(NanNew("metadata"), ParseMetadata(&metadata_array));
-    return NanEscapeScope(status_obj);
+    Nan::Set(status_obj, Nan::New("metadata").ToLocalChecked(),
+             ParseMetadata(&metadata_array));
+    return scope.Escape(status_obj);
   }
  protected:
   std::string GetTypeString() const {
@@ -396,12 +433,12 @@ class ClientStatusOp : public Op {
 
 class ServerCloseResponseOp : public Op {
  public:
-  Handle<Value> GetNodeValue() const {
-    NanEscapableScope();
-    return NanEscapeScope(NanNew<Boolean>(cancelled));
+  Local<Value> GetNodeValue() const {
+    EscapableHandleScope scope;
+    return scope.Escape(Nan::New<Boolean>(cancelled));
   }
 
-  bool ParseOp(Handle<Value> value, grpc_op *out,
+  bool ParseOp(Local<Value> value, grpc_op *out,
                shared_ptr<Resources> resources) {
     out->data.recv_close_on_server.cancelled = &cancelled;
     return true;
@@ -416,7 +453,7 @@ class ServerCloseResponseOp : public Op {
   int cancelled;
 };
 
-tag::tag(NanCallback *callback, OpVec *ops,
+tag::tag(Callback *callback, OpVec *ops,
          shared_ptr<Resources> resources) :
     callback(callback), ops(ops), resources(resources){
 }
@@ -426,19 +463,19 @@ tag::~tag() {
   delete ops;
 }
 
-Handle<Value> GetTagNodeValue(void *tag) {
-  NanEscapableScope();
+Local<Value> GetTagNodeValue(void *tag) {
+  EscapableHandleScope scope;
   struct tag *tag_struct = reinterpret_cast<struct tag *>(tag);
-  Handle<Object> tag_obj = NanNew<Object>();
+  Local<Object> tag_obj = Nan::New<Object>();
   for (vector<unique_ptr<Op> >::iterator it = tag_struct->ops->begin();
        it != tag_struct->ops->end(); ++it) {
     Op *op_ptr = it->get();
-    tag_obj->Set(op_ptr->GetOpType(), op_ptr->GetNodeValue());
+    Nan::Set(tag_obj, op_ptr->GetOpType(), op_ptr->GetNodeValue());
   }
-  return NanEscapeScope(tag_obj);
+  return scope.Escape(tag_obj);
 }
 
-NanCallback *GetTagCallback(void *tag) {
+Callback *GetTagCallback(void *tag) {
   struct tag *tag_struct = reinterpret_cast<struct tag *>(tag);
   return tag_struct->callback;
 }
@@ -455,140 +492,149 @@ Call::~Call() {
   grpc_call_destroy(wrapped_call);
 }
 
-void Call::Init(Handle<Object> exports) {
-  NanScope();
-  Local<FunctionTemplate> tpl = NanNew<FunctionTemplate>(New);
-  tpl->SetClassName(NanNew("Call"));
+void Call::Init(Local<Object> exports) {
+  HandleScope scope;
+  Local<FunctionTemplate> tpl = Nan::New<FunctionTemplate>(New);
+  tpl->SetClassName(Nan::New("Call").ToLocalChecked());
   tpl->InstanceTemplate()->SetInternalFieldCount(1);
-  NanSetPrototypeTemplate(tpl, "startBatch",
-                          NanNew<FunctionTemplate>(StartBatch)->GetFunction());
-  NanSetPrototypeTemplate(tpl, "cancel",
-                          NanNew<FunctionTemplate>(Cancel)->GetFunction());
-  NanSetPrototypeTemplate(
-      tpl, "cancelWithStatus",
-      NanNew<FunctionTemplate>(CancelWithStatus)->GetFunction());
-  NanSetPrototypeTemplate(tpl, "getPeer",
-                          NanNew<FunctionTemplate>(GetPeer)->GetFunction());
-  NanAssignPersistent(fun_tpl, tpl);
-  Handle<Function> ctr = tpl->GetFunction();
-  exports->Set(NanNew("Call"), ctr);
-  constructor = new NanCallback(ctr);
+  Nan::SetPrototypeMethod(tpl, "startBatch", StartBatch);
+  Nan::SetPrototypeMethod(tpl, "cancel", Cancel);
+  Nan::SetPrototypeMethod(tpl, "cancelWithStatus", CancelWithStatus);
+  Nan::SetPrototypeMethod(tpl, "getPeer", GetPeer);
+  fun_tpl.Reset(tpl);
+  Local<Function> ctr = Nan::GetFunction(tpl).ToLocalChecked();
+  Nan::Set(exports, Nan::New("Call").ToLocalChecked(), ctr);
+  constructor = new Callback(ctr);
 }
 
-bool Call::HasInstance(Handle<Value> val) {
-  NanScope();
-  return NanHasInstance(fun_tpl, val);
+bool Call::HasInstance(Local<Value> val) {
+  HandleScope scope;
+  return Nan::New(fun_tpl)->HasInstance(val);
 }
 
-Handle<Value> Call::WrapStruct(grpc_call *call) {
-  NanEscapableScope();
+Local<Value> Call::WrapStruct(grpc_call *call) {
+  EscapableHandleScope scope;
   if (call == NULL) {
-    return NanEscapeScope(NanNull());
+    return scope.Escape(Nan::Null());
   }
   const int argc = 1;
-  Handle<Value> argv[argc] = {NanNew<External>(reinterpret_cast<void *>(call))};
-  return NanEscapeScope(constructor->GetFunction()->NewInstance(argc, argv));
+  Local<Value> argv[argc] = {Nan::New<External>(
+      reinterpret_cast<void *>(call))};
+  MaybeLocal<Object> maybe_instance = Nan::NewInstance(
+      constructor->GetFunction(), argc, argv);
+  if (maybe_instance.IsEmpty()) {
+    return scope.Escape(Nan::Null());
+  } else {
+    return scope.Escape(maybe_instance.ToLocalChecked());
+  }
 }
 
 NAN_METHOD(Call::New) {
-  NanScope();
-
-  if (args.IsConstructCall()) {
+  if (info.IsConstructCall()) {
     Call *call;
-    if (args[0]->IsExternal()) {
-      Handle<External> ext = args[0].As<External>();
+    if (info[0]->IsExternal()) {
+      Local<External> ext = info[0].As<External>();
       // This option is used for wrapping an existing call
       grpc_call *call_value =
           reinterpret_cast<grpc_call *>(ext->Value());
       call = new Call(call_value);
     } else {
-      if (!Channel::HasInstance(args[0])) {
-        return NanThrowTypeError("Call's first argument must be a Channel");
+      if (!Channel::HasInstance(info[0])) {
+        return Nan::ThrowTypeError("Call's first argument must be a Channel");
       }
-      if (!args[1]->IsString()) {
-        return NanThrowTypeError("Call's second argument must be a string");
+      if (!info[1]->IsString()) {
+        return Nan::ThrowTypeError("Call's second argument must be a string");
       }
-      if (!(args[2]->IsNumber() || args[2]->IsDate())) {
-        return NanThrowTypeError(
+      if (!(info[2]->IsNumber() || info[2]->IsDate())) {
+        return Nan::ThrowTypeError(
             "Call's third argument must be a date or a number");
       }
       // These arguments are at the end because they are optional
       grpc_call *parent_call = NULL;
-      if (Call::HasInstance(args[4])) {
-        Call *parent_obj = ObjectWrap::Unwrap<Call>(args[4]->ToObject());
+      if (Call::HasInstance(info[4])) {
+        Call *parent_obj = ObjectWrap::Unwrap<Call>(
+            Nan::To<Object>(info[4]).ToLocalChecked());
         parent_call = parent_obj->wrapped_call;
-      } else if (!(args[4]->IsUndefined() || args[4]->IsNull())) {
-        return NanThrowTypeError(
+      } else if (!(info[4]->IsUndefined() || info[4]->IsNull())) {
+        return Nan::ThrowTypeError(
             "Call's fifth argument must be another call, if provided");
       }
       gpr_uint32 propagate_flags = GRPC_PROPAGATE_DEFAULTS;
-      if (args[5]->IsUint32()) {
-        propagate_flags = args[5]->Uint32Value();
-      } else if (!(args[5]->IsUndefined() || args[5]->IsNull())) {
-        return NanThrowTypeError(
+      if (info[5]->IsUint32()) {
+        propagate_flags = Nan::To<uint32_t>(info[5]).FromJust();
+      } else if (!(info[5]->IsUndefined() || info[5]->IsNull())) {
+        return Nan::ThrowTypeError(
             "Call's sixth argument must be propagate flags, if provided");
       }
-      Handle<Object> channel_object = args[0]->ToObject();
+      Local<Object> channel_object = Nan::To<Object>(info[0]).ToLocalChecked();
       Channel *channel = ObjectWrap::Unwrap<Channel>(channel_object);
       if (channel->GetWrappedChannel() == NULL) {
-        return NanThrowError("Call cannot be created from a closed channel");
+        return Nan::ThrowError("Call cannot be created from a closed channel");
       }
-      NanUtf8String method(args[1]);
-      double deadline = args[2]->NumberValue();
+      Utf8String method(info[1]);
+      double deadline = Nan::To<double>(info[2]).FromJust();
       grpc_channel *wrapped_channel = channel->GetWrappedChannel();
       grpc_call *wrapped_call;
-      if (args[3]->IsString()) {
-        NanUtf8String host_override(args[3]);
+      if (info[3]->IsString()) {
+        Utf8String host_override(info[3]);
         wrapped_call = grpc_channel_create_call(
             wrapped_channel, parent_call, propagate_flags,
             CompletionQueueAsyncWorker::GetQueue(), *method,
             *host_override, MillisecondsToTimespec(deadline), NULL);
-      } else if (args[3]->IsUndefined() || args[3]->IsNull()) {
+      } else if (info[3]->IsUndefined() || info[3]->IsNull()) {
         wrapped_call = grpc_channel_create_call(
             wrapped_channel, parent_call, propagate_flags,
             CompletionQueueAsyncWorker::GetQueue(), *method,
             NULL, MillisecondsToTimespec(deadline), NULL);
       } else {
-        return NanThrowTypeError("Call's fourth argument must be a string");
+        return Nan::ThrowTypeError("Call's fourth argument must be a string");
       }
       call = new Call(wrapped_call);
-      args.This()->SetHiddenValue(NanNew("channel_"), channel_object);
+      info.This()->SetHiddenValue(Nan::New("channel_").ToLocalChecked(),
+                                  channel_object);
     }
-    call->Wrap(args.This());
-    NanReturnValue(args.This());
+    call->Wrap(info.This());
+    info.GetReturnValue().Set(info.This());
   } else {
     const int argc = 4;
-    Local<Value> argv[argc] = {args[0], args[1], args[2], args[3]};
-    NanReturnValue(constructor->GetFunction()->NewInstance(argc, argv));
+    Local<Value> argv[argc] = {info[0], info[1], info[2], info[3]};
+    MaybeLocal<Object> maybe_instance = constructor->GetFunction()->NewInstance(
+        argc, argv);
+    if (maybe_instance.IsEmpty()) {
+      // There's probably a pending exception
+      return;
+    } else {
+      info.GetReturnValue().Set(maybe_instance.ToLocalChecked());
+    }
   }
 }
 
 NAN_METHOD(Call::StartBatch) {
-  NanScope();
-  if (!HasInstance(args.This())) {
-    return NanThrowTypeError("startBatch can only be called on Call objects");
+  if (!Call::HasInstance(info.This())) {
+    return Nan::ThrowTypeError("startBatch can only be called on Call objects");
   }
-  if (!args[0]->IsObject()) {
-    return NanThrowError("startBatch's first argument must be an object");
+  if (!info[0]->IsObject()) {
+    return Nan::ThrowError("startBatch's first argument must be an object");
   }
-  if (!args[1]->IsFunction()) {
-    return NanThrowError("startBatch's second argument must be a callback");
+  if (!info[1]->IsFunction()) {
+    return Nan::ThrowError("startBatch's second argument must be a callback");
   }
-  Handle<Function> callback_func = args[1].As<Function>();
-  Call *call = ObjectWrap::Unwrap<Call>(args.This());
+  Local<Function> callback_func = info[1].As<Function>();
+  Call *call = ObjectWrap::Unwrap<Call>(info.This());
   shared_ptr<Resources> resources(new Resources);
-  Handle<Object> obj = args[0]->ToObject();
-  Handle<Array> keys = obj->GetOwnPropertyNames();
+  Local<Object> obj = Nan::To<Object>(info[0]).ToLocalChecked();
+  Local<Array> keys = Nan::GetOwnPropertyNames(obj).ToLocalChecked();
   size_t nops = keys->Length();
   vector<grpc_op> ops(nops);
   unique_ptr<OpVec> op_vector(new OpVec());
   for (unsigned int i = 0; i < nops; i++) {
     unique_ptr<Op> op;
-    if (!keys->Get(i)->IsUint32()) {
-      return NanThrowError(
+    MaybeLocal<Value> maybe_key = Nan::Get(keys, i);
+    if (maybe_key.IsEmpty() || (!maybe_key.ToLocalChecked()->IsUint32())) {
+      return Nan::ThrowError(
           "startBatch's first argument's keys must be integers");
     }
-    uint32_t type = keys->Get(i)->Uint32Value();
+    uint32_t type = Nan::To<uint32_t>(maybe_key.ToLocalChecked()).FromJust();
     ops[i].op = static_cast<grpc_op_type>(type);
     ops[i].flags = 0;
     ops[i].reserved = NULL;
@@ -618,67 +664,64 @@ NAN_METHOD(Call::StartBatch) {
         op.reset(new ServerCloseResponseOp());
         break;
       default:
-        return NanThrowError("Argument object had an unrecognized key");
+        return Nan::ThrowError("Argument object had an unrecognized key");
     }
     if (!op->ParseOp(obj->Get(type), &ops[i], resources)) {
-      return NanThrowTypeError("Incorrectly typed arguments to startBatch");
+      return Nan::ThrowTypeError("Incorrectly typed arguments to startBatch");
     }
     op_vector->push_back(std::move(op));
   }
-  NanCallback *callback = new NanCallback(callback_func);
+  Callback *callback = new Callback(callback_func);
   grpc_call_error error = grpc_call_start_batch(
       call->wrapped_call, &ops[0], nops, new struct tag(
           callback, op_vector.release(), resources), NULL);
   if (error != GRPC_CALL_OK) {
-    return NanThrowError(nanErrorWithCode("startBatch failed", error));
+    return Nan::ThrowError(nanErrorWithCode("startBatch failed", error));
   }
   CompletionQueueAsyncWorker::Next();
-  NanReturnUndefined();
 }
 
 NAN_METHOD(Call::Cancel) {
-  NanScope();
-  if (!HasInstance(args.This())) {
-    return NanThrowTypeError("cancel can only be called on Call objects");
+  if (!Call::HasInstance(info.This())) {
+    return Nan::ThrowTypeError("cancel can only be called on Call objects");
   }
-  Call *call = ObjectWrap::Unwrap<Call>(args.This());
+  Call *call = ObjectWrap::Unwrap<Call>(info.This());
   grpc_call_error error = grpc_call_cancel(call->wrapped_call, NULL);
   if (error != GRPC_CALL_OK) {
-    return NanThrowError(nanErrorWithCode("cancel failed", error));
+    return Nan::ThrowError(nanErrorWithCode("cancel failed", error));
   }
-  NanReturnUndefined();
 }
 
 NAN_METHOD(Call::CancelWithStatus) {
-  NanScope();
-  if (!HasInstance(args.This())) {
-    return NanThrowTypeError("cancel can only be called on Call objects");
+  Nan::HandleScope scope;
+  if (!HasInstance(info.This())) {
+    return Nan::ThrowTypeError("cancel can only be called on Call objects");
   }
-  if (!args[0]->IsUint32()) {
-    return NanThrowTypeError(
+  if (!info[0]->IsUint32()) {
+    return Nan::ThrowTypeError(
         "cancelWithStatus's first argument must be a status code");
   }
-  if (!args[1]->IsString()) {
-    return NanThrowTypeError(
+  if (!info[1]->IsString()) {
+    return Nan::ThrowTypeError(
         "cancelWithStatus's second argument must be a string");
   }
-  Call *call = ObjectWrap::Unwrap<Call>(args.This());
-  grpc_status_code code = static_cast<grpc_status_code>(args[0]->Uint32Value());
-  NanUtf8String details(args[0]);
+  Call *call = ObjectWrap::Unwrap<Call>(info.This());
+  grpc_status_code code = static_cast<grpc_status_code>(
+      Nan::To<uint32_t>(info[0]).FromJust());
+  Utf8String details(info[0]);
   grpc_call_cancel_with_status(call->wrapped_call, code, *details, NULL);
-  NanReturnUndefined();
 }
 
 NAN_METHOD(Call::GetPeer) {
-  NanScope();
-  if (!HasInstance(args.This())) {
-    return NanThrowTypeError("getPeer can only be called on Call objects");
+  Nan::HandleScope scope;
+  if (!HasInstance(info.This())) {
+    return Nan::ThrowTypeError("getPeer can only be called on Call objects");
   }
-  Call *call = ObjectWrap::Unwrap<Call>(args.This());
+  Call *call = ObjectWrap::Unwrap<Call>(info.This());
   char *peer = grpc_call_get_peer(call->wrapped_call);
-  Handle<Value> peer_value = NanNew(peer);
+  Local<Value> peer_value = Nan::New(peer).ToLocalChecked();
   gpr_free(peer);
-  NanReturnValue(peer_value);
+  info.GetReturnValue().Set(peer_value);
 }
 
 }  // namespace node

src/node/ext/call.h

@@ -51,6 +51,8 @@ namespace node {
 using std::unique_ptr;
 using std::shared_ptr;
 
+typedef Nan::Persistent<v8::Value, Nan::CopyablePersistentTraits<v8::Value>> PersistentValue;
+
 /**
  * Helper function for throwing errors with a grpc_call_error value.
  * Modified from the answer by Gus Goose to
@@ -58,41 +60,26 @@ using std::shared_ptr;
  */
 inline v8::Local<v8::Value> nanErrorWithCode(const char *msg,
                                              grpc_call_error code) {
-    NanEscapableScope();
-    v8::Local<v8::Object> err = NanError(msg).As<v8::Object>();
-    err->Set(NanNew("code"), NanNew<v8::Uint32>(code));
-    return NanEscapeScope(err);
+  Nan::EscapableHandleScope scope;
+    v8::Local<v8::Object> err = Nan::Error(msg).As<v8::Object>();
+    Nan::Set(err, Nan::New("code").ToLocalChecked(), Nan::New<v8::Uint32>(code));
+    return scope.Escape(err);
 }
 
-v8::Handle<v8::Value> ParseMetadata(const grpc_metadata_array *metadata_array);
-
-class PersistentHolder {
- public:
-  explicit PersistentHolder(v8::Persistent<v8::Value> *persist) :
-      persist(persist) {
-  }
-
-  ~PersistentHolder() {
-    NanDisposePersistent(*persist);
-    delete persist;
-  }
-
- private:
-  v8::Persistent<v8::Value> *persist;
-};
+v8::Local<v8::Value> ParseMetadata(const grpc_metadata_array *metadata_array);
 
 struct Resources {
-  std::vector<unique_ptr<NanUtf8String> > strings;
-  std::vector<unique_ptr<PersistentHolder> > handles;
+  std::vector<unique_ptr<Nan::Utf8String> > strings;
+  std::vector<unique_ptr<PersistentValue> > handles;
 };
 
 class Op {
  public:
-  virtual ~Op();
-  virtual v8::Handle<v8::Value> GetNodeValue() const = 0;
-  virtual bool ParseOp(v8::Handle<v8::Value> value, grpc_op *out,
+  virtual v8::Local<v8::Value> GetNodeValue() const = 0;
+  virtual bool ParseOp(v8::Local<v8::Value> value, grpc_op *out,
                        shared_ptr<Resources> resources) = 0;
-  v8::Handle<v8::Value> GetOpType() const;
+  virtual ~Op();
+  v8::Local<v8::Value> GetOpType() const;
 
  protected:
   virtual std::string GetTypeString() const = 0;
@@ -100,27 +87,27 @@ class Op {
 
 typedef std::vector<unique_ptr<Op>> OpVec;
 struct tag {
-  tag(NanCallback *callback, OpVec *ops,
+  tag(Nan::Callback *callback, OpVec *ops,
       shared_ptr<Resources> resources);
   ~tag();
-  NanCallback *callback;
+  Nan::Callback *callback;
   OpVec *ops;
   shared_ptr<Resources> resources;
 };
 
-v8::Handle<v8::Value> GetTagNodeValue(void *tag);
+v8::Local<v8::Value> GetTagNodeValue(void *tag);
 
-NanCallback *GetTagCallback(void *tag);
+Nan::Callback *GetTagCallback(void *tag);
 
 void DestroyTag(void *tag);
 
 /* Wrapper class for grpc_call structs. */
-class Call : public ::node::ObjectWrap {
+class Call : public Nan::ObjectWrap {
  public:
-  static void Init(v8::Handle<v8::Object> exports);
-  static bool HasInstance(v8::Handle<v8::Value> val);
+  static void Init(v8::Local<v8::Object> exports);
+  static bool HasInstance(v8::Local<v8::Value> val);
   /* Wrap a grpc_call struct in a javascript object */
-  static v8::Handle<v8::Value> WrapStruct(grpc_call *call);
+  static v8::Local<v8::Value> WrapStruct(grpc_call *call);
 
  private:
   explicit Call(grpc_call *call);
@@ -135,9 +122,9 @@ class Call : public ::node::ObjectWrap {
   static NAN_METHOD(Cancel);
   static NAN_METHOD(CancelWithStatus);
   static NAN_METHOD(GetPeer);
-  static NanCallback *constructor;
+  static Nan::Callback *constructor;
   // Used for typechecking instances of this javascript class
-  static v8::Persistent<v8::FunctionTemplate> fun_tpl;
+  static Nan::Persistent<v8::FunctionTemplate> fun_tpl;
 
   grpc_call *wrapped_call;
 };

src/node/ext/channel.cc

@@ -48,21 +48,27 @@
 namespace grpc {
 namespace node {
 
+using Nan::Callback;
+using Nan::EscapableHandleScope;
+using Nan::HandleScope;
+using Nan::Maybe;
+using Nan::MaybeLocal;
+using Nan::ObjectWrap;
+using Nan::Persistent;
+using Nan::Utf8String;
+
 using v8::Array;
 using v8::Exception;
 using v8::Function;
 using v8::FunctionTemplate;
-using v8::Handle;
-using v8::HandleScope;
 using v8::Integer;
 using v8::Local;
 using v8::Number;
 using v8::Object;
-using v8::Persistent;
 using v8::String;
 using v8::Value;
 
-NanCallback *Channel::constructor;
+Callback *Channel::constructor;
 Persistent<FunctionTemplate> Channel::fun_tpl;
 
 Channel::Channel(grpc_channel *channel) : wrapped_channel(channel) {}
@@ -73,88 +79,89 @@ Channel::~Channel() {
   }
 }
 
-void Channel::Init(Handle<Object> exports) {
-  NanScope();
-  Local<FunctionTemplate> tpl = NanNew<FunctionTemplate>(New);
-  tpl->SetClassName(NanNew("Channel"));
+void Channel::Init(Local<Object> exports) {
+  Nan::HandleScope scope;
+  Local<FunctionTemplate> tpl = Nan::New<FunctionTemplate>(New);
+  tpl->SetClassName(Nan::New("Channel").ToLocalChecked());
   tpl->InstanceTemplate()->SetInternalFieldCount(1);
-  NanSetPrototypeTemplate(tpl, "close",
-                          NanNew<FunctionTemplate>(Close)->GetFunction());
-  NanSetPrototypeTemplate(tpl, "getTarget",
-                          NanNew<FunctionTemplate>(GetTarget)->GetFunction());
-  NanSetPrototypeTemplate(
-      tpl, "getConnectivityState",
-      NanNew<FunctionTemplate>(GetConnectivityState)->GetFunction());
-  NanSetPrototypeTemplate(
-      tpl, "watchConnectivityState",
-      NanNew<FunctionTemplate>(WatchConnectivityState)->GetFunction());
-  NanAssignPersistent(fun_tpl, tpl);
-  Handle<Function> ctr = tpl->GetFunction();
-  constructor = new NanCallback(ctr);
-  exports->Set(NanNew("Channel"), ctr);
+  Nan::SetPrototypeMethod(tpl, "close", Close);
+  Nan::SetPrototypeMethod(tpl, "getTarget", GetTarget);
+  Nan::SetPrototypeMethod(tpl, "getConnectivityState", GetConnectivityState);
+  Nan::SetPrototypeMethod(tpl, "watchConnectivityState",
+                          WatchConnectivityState);
+  fun_tpl.Reset(tpl);
+  Local<Function> ctr = Nan::GetFunction(tpl).ToLocalChecked();
+  Nan::Set(exports, Nan::New("Channel").ToLocalChecked(), ctr);
+  constructor = new Callback(ctr);
 }
 
-bool Channel::HasInstance(Handle<Value> val) {
-  NanScope();
-  return NanHasInstance(fun_tpl, val);
+bool Channel::HasInstance(Local<Value> val) {
+  HandleScope scope;
+  return Nan::New(fun_tpl)->HasInstance(val);
 }
 
 grpc_channel *Channel::GetWrappedChannel() { return this->wrapped_channel; }
 
 NAN_METHOD(Channel::New) {
-  NanScope();
-
-  if (args.IsConstructCall()) {
-    if (!args[0]->IsString()) {
-      return NanThrowTypeError(
+  if (info.IsConstructCall()) {
+    if (!info[0]->IsString()) {
+      return Nan::ThrowTypeError(
           "Channel expects a string, a credential and an object");
     }
     grpc_channel *wrapped_channel;
     // Owned by the Channel object
-    NanUtf8String host(args[0]);
+    Utf8String host(info[0]);
     grpc_credentials *creds;
-    if (!Credentials::HasInstance(args[1])) {
-      return NanThrowTypeError(
+    if (!Credentials::HasInstance(info[1])) {
+      return Nan::ThrowTypeError(
           "Channel's second argument must be a credential");
     }
     Credentials *creds_object = ObjectWrap::Unwrap<Credentials>(
-        args[1]->ToObject());
+        Nan::To<Object>(info[1]).ToLocalChecked());
     creds = creds_object->GetWrappedCredentials();
     grpc_channel_args *channel_args_ptr;
-    if (args[2]->IsUndefined()) {
+    if (info[2]->IsUndefined()) {
       channel_args_ptr = NULL;
       wrapped_channel = grpc_insecure_channel_create(*host, NULL, NULL);
-    } else if (args[2]->IsObject()) {
-      Handle<Object> args_hash(args[2]->ToObject()->Clone());
-      Handle<Array> keys(args_hash->GetOwnPropertyNames());
+    } else if (info[2]->IsObject()) {
+      Local<Object> args_hash = Nan::To<Object>(info[2]).ToLocalChecked();
+      Local<Array> keys(Nan::GetOwnPropertyNames(args_hash).ToLocalChecked());
       grpc_channel_args channel_args;
       channel_args.num_args = keys->Length();
       channel_args.args = reinterpret_cast<grpc_arg *>(
           calloc(channel_args.num_args, sizeof(grpc_arg)));
       /* These are used to keep all strings until then end of the block, then
          destroy them */
-      std::vector<NanUtf8String *> key_strings(keys->Length());
-      std::vector<NanUtf8String *> value_strings(keys->Length());
+      std::vector<Nan::Utf8String *> key_strings(keys->Length());
+      std::vector<Nan::Utf8String *> value_strings(keys->Length());
       for (unsigned int i = 0; i < channel_args.num_args; i++) {
-        Handle<String> current_key(keys->Get(i)->ToString());
-        Handle<Value> current_value(args_hash->Get(current_key));
-        key_strings[i] = new NanUtf8String(current_key);
+        MaybeLocal<String> maybe_key = Nan::To<String>(
+            Nan::Get(keys, i).ToLocalChecked());
+        if (maybe_key.IsEmpty()) {
+          free(channel_args.args);
+          return Nan::ThrowTypeError("Arg keys must be strings");
+        }
+        Local<String> current_key = maybe_key.ToLocalChecked();
+        Local<Value> current_value = Nan::Get(args_hash,
+                                               current_key).ToLocalChecked();
+        key_strings[i] = new Nan::Utf8String(current_key);
         channel_args.args[i].key = **key_strings[i];
         if (current_value->IsInt32()) {
           channel_args.args[i].type = GRPC_ARG_INTEGER;
-          channel_args.args[i].value.integer = current_value->Int32Value();
+          channel_args.args[i].value.integer = Nan::To<int32_t>(
+              current_value).FromJust();
         } else if (current_value->IsString()) {
           channel_args.args[i].type = GRPC_ARG_STRING;
-          value_strings[i] = new NanUtf8String(current_value);
+          value_strings[i] = new Nan::Utf8String(current_value);
           channel_args.args[i].value.string = **value_strings[i];
         } else {
           free(channel_args.args);
-          return NanThrowTypeError("Arg values must be strings");
+          return Nan::ThrowTypeError("Arg values must be strings");
         }
       }
       channel_args_ptr = &channel_args;
     } else {
-      return NanThrowTypeError("Channel expects a string and an object");
+      return Nan::ThrowTypeError("Channel expects a string and an object");
     }
     if (creds == NULL) {
       wrapped_channel = grpc_insecure_channel_create(*host, channel_args_ptr,
@@ -167,73 +174,79 @@ NAN_METHOD(Channel::New) {
       free(channel_args_ptr->args);
     }
     Channel *channel = new Channel(wrapped_channel);
-    channel->Wrap(args.This());
-    NanReturnValue(args.This());
+    channel->Wrap(info.This());
+    info.GetReturnValue().Set(info.This());
+    return;
   } else {
     const int argc = 3;
-    Local<Value> argv[argc] = {args[0], args[1], args[2]};
-    NanReturnValue(constructor->GetFunction()->NewInstance(argc, argv));
+    Local<Value> argv[argc] = {info[0], info[1], info[2]};
+    MaybeLocal<Object> maybe_instance = constructor->GetFunction()->NewInstance(
+        argc, argv);
+    if (maybe_instance.IsEmpty()) {
+      // There's probably a pending exception
+      return;
+    } else {
+      info.GetReturnValue().Set(maybe_instance.ToLocalChecked());
+    }
   }
 }
 
 NAN_METHOD(Channel::Close) {
-  NanScope();
-  if (!HasInstance(args.This())) {
-    return NanThrowTypeError("close can only be called on Channel objects");
+  if (!HasInstance(info.This())) {
+    return Nan::ThrowTypeError("close can only be called on Channel objects");
   }
-  Channel *channel = ObjectWrap::Unwrap<Channel>(args.This());
+  Channel *channel = ObjectWrap::Unwrap<Channel>(info.This());
   if (channel->wrapped_channel != NULL) {
     grpc_channel_destroy(channel->wrapped_channel);
     channel->wrapped_channel = NULL;
   }
-  NanReturnUndefined();
 }
 
 NAN_METHOD(Channel::GetTarget) {
-  NanScope();
-  if (!HasInstance(args.This())) {
-    return NanThrowTypeError("getTarget can only be called on Channel objects");
+  if (!HasInstance(info.This())) {
+    return Nan::ThrowTypeError("getTarget can only be called on Channel objects");
   }
-  Channel *channel = ObjectWrap::Unwrap<Channel>(args.This());
-  NanReturnValue(NanNew(grpc_channel_get_target(channel->wrapped_channel)));
+  Channel *channel = ObjectWrap::Unwrap<Channel>(info.This());
+  info.GetReturnValue().Set(Nan::New(
+      grpc_channel_get_target(channel->wrapped_channel)).ToLocalChecked());
 }
 
 NAN_METHOD(Channel::GetConnectivityState) {
-  NanScope();
-  if (!HasInstance(args.This())) {
-    return NanThrowTypeError(
+  if (!HasInstance(info.This())) {
+    return Nan::ThrowTypeError(
         "getConnectivityState can only be called on Channel objects");
   }
-  Channel *channel = ObjectWrap::Unwrap<Channel>(args.This());
-  int try_to_connect = (int)args[0]->Equals(NanTrue());
-  NanReturnValue(grpc_channel_check_connectivity_state(channel->wrapped_channel,
-                                                       try_to_connect));
+  Channel *channel = ObjectWrap::Unwrap<Channel>(info.This());
+  int try_to_connect = (int)info[0]->Equals(Nan::True());
+  info.GetReturnValue().Set(
+      grpc_channel_check_connectivity_state(channel->wrapped_channel,
+                                            try_to_connect));
 }
 
 NAN_METHOD(Channel::WatchConnectivityState) {
-  NanScope();
-  if (!HasInstance(args.This())) {
-    return NanThrowTypeError(
+  if (!HasInstance(info.This())) {
+    return Nan::ThrowTypeError(
         "watchConnectivityState can only be called on Channel objects");
   }
-  if (!args[0]->IsUint32()) {
-    return NanThrowTypeError(
+  if (!info[0]->IsUint32()) {
+    return Nan::ThrowTypeError(
         "watchConnectivityState's first argument must be a channel state");
   }
-  if (!(args[1]->IsNumber() || args[1]->IsDate())) {
-    return NanThrowTypeError(
+  if (!(info[1]->IsNumber() || info[1]->IsDate())) {
+    return Nan::ThrowTypeError(
         "watchConnectivityState's second argument must be a date or a number");
   }
-  if (!args[2]->IsFunction()) {
-    return NanThrowTypeError(
+  if (!info[2]->IsFunction()) {
+    return Nan::ThrowTypeError(
         "watchConnectivityState's third argument must be a callback");
   }
   grpc_connectivity_state last_state =
-      static_cast<grpc_connectivity_state>(args[0]->Uint32Value());
-  double deadline = args[1]->NumberValue();
-  Handle<Function> callback_func = args[2].As<Function>();
-  NanCallback *callback = new NanCallback(callback_func);
-  Channel *channel = ObjectWrap::Unwrap<Channel>(args.This());
+      static_cast<grpc_connectivity_state>(
+          Nan::To<uint32_t>(info[0]).FromJust());
+  double deadline = Nan::To<double>(info[1]).FromJust();
+  Local<Function> callback_func = info[2].As<Function>();
+  Nan::Callback *callback = new Callback(callback_func);
+  Channel *channel = ObjectWrap::Unwrap<Channel>(info.This());
   unique_ptr<OpVec> ops(new OpVec());
   grpc_channel_watch_connectivity_state(
       channel->wrapped_channel, last_state, MillisecondsToTimespec(deadline),
@@ -242,7 +255,6 @@ NAN_METHOD(Channel::WatchConnectivityState) {
                      ops.release(),
                      shared_ptr<Resources>(nullptr)));
   CompletionQueueAsyncWorker::Next();
-  NanReturnUndefined();
 }
 
 }  // namespace node

src/node/ext/channel.h

@@ -42,10 +42,10 @@ namespace grpc {
 namespace node {
 
 /* Wrapper class for grpc_channel structs */
-class Channel : public ::node::ObjectWrap {
+class Channel : public Nan::ObjectWrap {
  public:
-  static void Init(v8::Handle<v8::Object> exports);
-  static bool HasInstance(v8::Handle<v8::Value> val);
+  static void Init(v8::Local<v8::Object> exports);
+  static bool HasInstance(v8::Local<v8::Value> val);
   /* This is used to typecheck javascript objects before converting them to
      this type */
   static v8::Persistent<v8::Value> prototype;
@@ -66,8 +66,8 @@ class Channel : public ::node::ObjectWrap {
   static NAN_METHOD(GetTarget);
   static NAN_METHOD(GetConnectivityState);
   static NAN_METHOD(WatchConnectivityState);
-  static NanCallback *constructor;
-  static v8::Persistent<v8::FunctionTemplate> fun_tpl;
+  static Nan::Callback *constructor;
+  static Nan::Persistent<v8::FunctionTemplate> fun_tpl;
 
   grpc_channel *wrapped_channel;
 };

src/node/ext/completion_queue_async_worker.cc

@@ -46,9 +46,8 @@ namespace node {
 const int max_queue_threads = 2;
 
 using v8::Function;
-using v8::Handle;
+using v8::Local;
 using v8::Object;
-using v8::Persistent;
 using v8::Value;
 
 grpc_completion_queue *CompletionQueueAsyncWorker::queue;
@@ -57,7 +56,7 @@ int CompletionQueueAsyncWorker::current_threads;
 int CompletionQueueAsyncWorker::waiting_next_calls;
 
 CompletionQueueAsyncWorker::CompletionQueueAsyncWorker()
-    : NanAsyncWorker(NULL) {}
+    : Nan::AsyncWorker(NULL) {}
 
 CompletionQueueAsyncWorker::~CompletionQueueAsyncWorker() {}
 
@@ -72,42 +71,42 @@ void CompletionQueueAsyncWorker::Execute() {
 grpc_completion_queue *CompletionQueueAsyncWorker::GetQueue() { return queue; }
 
 void CompletionQueueAsyncWorker::Next() {
-  NanScope();
+  Nan::HandleScope scope;
   if (current_threads < max_queue_threads) {
     CompletionQueueAsyncWorker *worker = new CompletionQueueAsyncWorker();
-    NanAsyncQueueWorker(worker);
+    Nan::AsyncQueueWorker(worker);
   } else {
     waiting_next_calls += 1;
   }
 }
 
-void CompletionQueueAsyncWorker::Init(Handle<Object> exports) {
-  NanScope();
+void CompletionQueueAsyncWorker::Init(Local<Object> exports) {
+  Nan::HandleScope scope;
   current_threads = 0;
   waiting_next_calls = 0;
   queue = grpc_completion_queue_create(NULL);
 }
 
 void CompletionQueueAsyncWorker::HandleOKCallback() {
-  NanScope();
+  Nan::HandleScope scope;
   if (waiting_next_calls > 0) {
     waiting_next_calls -= 1;
     CompletionQueueAsyncWorker *worker = new CompletionQueueAsyncWorker();
-    NanAsyncQueueWorker(worker);
+    Nan::AsyncQueueWorker(worker);
   } else {
     current_threads -= 1;
   }
-  NanCallback *callback = GetTagCallback(result.tag);
-  Handle<Value> argv[] = {NanNull(), GetTagNodeValue(result.tag)};
+  Nan::Callback *callback = GetTagCallback(result.tag);
+  Local<Value> argv[] = {Nan::Null(), GetTagNodeValue(result.tag)};
   callback->Call(2, argv);
 
   DestroyTag(result.tag);
 }
 
 void CompletionQueueAsyncWorker::HandleErrorCallback() {
-  NanScope();
-  NanCallback *callback = GetTagCallback(result.tag);
-  Handle<Value> argv[] = {NanError(ErrorMessage())};
+  Nan::HandleScope scope;
+  Nan::Callback *callback = GetTagCallback(result.tag);
+  Local<Value> argv[] = {Nan::Error(ErrorMessage())};
 
   callback->Call(1, argv);
 

src/node/ext/completion_queue_async_worker.h

@@ -42,7 +42,7 @@ namespace node {
 
 /* A worker that asynchronously calls completion_queue_next, and queues onto the
    node event loop a call to the function stored in the event's tag. */
-class CompletionQueueAsyncWorker : public NanAsyncWorker {
+class CompletionQueueAsyncWorker : public Nan::AsyncWorker {
  public:
   CompletionQueueAsyncWorker();
 
@@ -59,7 +59,7 @@ class CompletionQueueAsyncWorker : public NanAsyncWorker {
   static void Next();
 
   /* Initialize the CompletionQueueAsyncWorker class */
-  static void Init(v8::Handle<v8::Object> exports);
+  static void Init(v8::Local<v8::Object> exports);
 
  protected:
   /* Called when Execute has succeeded (completed without setting an error

src/node/ext/credentials.cc

@@ -41,20 +41,26 @@
 namespace grpc {
 namespace node {
 
+using Nan::Callback;
+using Nan::EscapableHandleScope;
+using Nan::HandleScope;
+using Nan::Maybe;
+using Nan::MaybeLocal;
+using Nan::ObjectWrap;
+using Nan::Persistent;
+using Nan::Utf8String;
+
 using v8::Exception;
 using v8::External;
 using v8::Function;
 using v8::FunctionTemplate;
-using v8::Handle;
-using v8::HandleScope;
 using v8::Integer;
 using v8::Local;
 using v8::Object;
 using v8::ObjectTemplate;
-using v8::Persistent;
 using v8::Value;
 
-NanCallback *Credentials::constructor;
+Nan::Callback *Credentials::constructor;
 Persistent<FunctionTemplate> Credentials::fun_tpl;
 
 Credentials::Credentials(grpc_credentials *credentials)
@@ -64,40 +70,52 @@ Credentials::~Credentials() {
   grpc_credentials_release(wrapped_credentials);
 }
 
-void Credentials::Init(Handle<Object> exports) {
-  NanScope();
-  Local<FunctionTemplate> tpl = NanNew<FunctionTemplate>(New);
-  tpl->SetClassName(NanNew("Credentials"));
+void Credentials::Init(Local<Object> exports) {
+  HandleScope scope;
+  Local<FunctionTemplate> tpl = Nan::New<FunctionTemplate>(New);
+  tpl->SetClassName(Nan::New("Credentials").ToLocalChecked());
   tpl->InstanceTemplate()->SetInternalFieldCount(1);
-  NanAssignPersistent(fun_tpl, tpl);
-  Handle<Function> ctr = tpl->GetFunction();
-  ctr->Set(NanNew("createDefault"),
-           NanNew<FunctionTemplate>(CreateDefault)->GetFunction());
-  ctr->Set(NanNew("createSsl"),
-           NanNew<FunctionTemplate>(CreateSsl)->GetFunction());
-  ctr->Set(NanNew("createComposite"),
-           NanNew<FunctionTemplate>(CreateComposite)->GetFunction());
-  ctr->Set(NanNew("createGce"),
-           NanNew<FunctionTemplate>(CreateGce)->GetFunction());
-  ctr->Set(NanNew("createIam"),
-           NanNew<FunctionTemplate>(CreateIam)->GetFunction());
-  ctr->Set(NanNew("createInsecure"),
-           NanNew<FunctionTemplate>(CreateInsecure)->GetFunction());
-  constructor = new NanCallback(ctr);
-  exports->Set(NanNew("Credentials"), ctr);
+  fun_tpl.Reset(tpl);
+  Local<Function> ctr = Nan::GetFunction(tpl).ToLocalChecked();
+  Nan::Set(ctr, Nan::New("createDefault").ToLocalChecked(),
+           Nan::GetFunction(
+               Nan::New<FunctionTemplate>(CreateDefault)).ToLocalChecked());
+  Nan::Set(ctr, Nan::New("createSsl").ToLocalChecked(),
+           Nan::GetFunction(
+               Nan::New<FunctionTemplate>(CreateSsl)).ToLocalChecked());
+  Nan::Set(ctr, Nan::New("createComposite").ToLocalChecked(),
+           Nan::GetFunction(
+               Nan::New<FunctionTemplate>(CreateComposite)).ToLocalChecked());
+  Nan::Set(ctr, Nan::New("createGce").ToLocalChecked(),
+           Nan::GetFunction(
+               Nan::New<FunctionTemplate>(CreateGce)).ToLocalChecked());
+  Nan::Set(ctr, Nan::New("createIam").ToLocalChecked(),
+           Nan::GetFunction(
+               Nan::New<FunctionTemplate>(CreateIam)).ToLocalChecked());
+  Nan::Set(ctr, Nan::New("createInsecure").ToLocalChecked(),
+           Nan::GetFunction(
+               Nan::New<FunctionTemplate>(CreateInsecure)).ToLocalChecked());
+  Nan::Set(exports, Nan::New("Credentials").ToLocalChecked(), ctr);
+  constructor = new Nan::Callback(ctr);
 }
 
-bool Credentials::HasInstance(Handle<Value> val) {
-  NanScope();
-  return NanHasInstance(fun_tpl, val);
+bool Credentials::HasInstance(Local<Value> val) {
+  HandleScope scope;
+  return Nan::New(fun_tpl)->HasInstance(val);
 }
 
-Handle<Value> Credentials::WrapStruct(grpc_credentials *credentials) {
-  NanEscapableScope();
+Local<Value> Credentials::WrapStruct(grpc_credentials *credentials) {
+  EscapableHandleScope scope;
   const int argc = 1;
-  Handle<Value> argv[argc] = {
-    NanNew<External>(reinterpret_cast<void *>(credentials))};
-  return NanEscapeScope(constructor->GetFunction()->NewInstance(argc, argv));
+  Local<Value> argv[argc] = {
+    Nan::New<External>(reinterpret_cast<void *>(credentials))};
+  MaybeLocal<Object> maybe_instance = Nan::NewInstance(
+      constructor->GetFunction(), argc, argv);
+  if (maybe_instance.IsEmpty()) {
+    return scope.Escape(Nan::Null());
+  } else {
+    return scope.Escape(maybe_instance.ToLocalChecked());
+  }
 }
 
 grpc_credentials *Credentials::GetWrappedCredentials() {
@@ -105,115 +123,123 @@ grpc_credentials *Credentials::GetWrappedCredentials() {
 }
 
 NAN_METHOD(Credentials::New) {
-  NanScope();
-
-  if (args.IsConstructCall()) {
-    if (!args[0]->IsExternal()) {
-      return NanThrowTypeError(
+  if (info.IsConstructCall()) {
+    if (!info[0]->IsExternal()) {
+      return Nan::ThrowTypeError(
           "Credentials can only be created with the provided functions");
     }
-    Handle<External> ext = args[0].As<External>();
+    Local<External> ext = info[0].As<External>();
     grpc_credentials *creds_value =
         reinterpret_cast<grpc_credentials *>(ext->Value());
     Credentials *credentials = new Credentials(creds_value);
-    credentials->Wrap(args.This());
-    NanReturnValue(args.This());
+    credentials->Wrap(info.This());
+    info.GetReturnValue().Set(info.This());
+    return;
   } else {
     const int argc = 1;
-    Local<Value> argv[argc] = {args[0]};
-    NanReturnValue(constructor->GetFunction()->NewInstance(argc, argv));
+    Local<Value> argv[argc] = {info[0]};
+    MaybeLocal<Object> maybe_instance = constructor->GetFunction()->NewInstance(
+        argc, argv);
+    if (maybe_instance.IsEmpty()) {
+      // There's probably a pending exception
+      return;
+    } else {
+      info.GetReturnValue().Set(maybe_instance.ToLocalChecked());
+    }
   }
 }
 
 NAN_METHOD(Credentials::CreateDefault) {
-  NanScope();
   grpc_credentials *creds = grpc_google_default_credentials_create();
   if (creds == NULL) {
-    NanReturnNull();
+    info.GetReturnValue().SetNull();
+  } else {
+    info.GetReturnValue().Set(WrapStruct(creds));
   }
-  NanReturnValue(WrapStruct(creds));
 }
 
 NAN_METHOD(Credentials::CreateSsl) {
-  NanScope();
   char *root_certs = NULL;
   grpc_ssl_pem_key_cert_pair key_cert_pair = {NULL, NULL};
-  if (::node::Buffer::HasInstance(args[0])) {
-    root_certs = ::node::Buffer::Data(args[0]);
-  } else if (!(args[0]->IsNull() || args[0]->IsUndefined())) {
-    return NanThrowTypeError("createSsl's first argument must be a Buffer");
+  if (::node::Buffer::HasInstance(info[0])) {
+    root_certs = ::node::Buffer::Data(info[0]);
+  } else if (!(info[0]->IsNull() || info[0]->IsUndefined())) {
+    return Nan::ThrowTypeError("createSsl's first argument must be a Buffer");
   }
-  if (::node::Buffer::HasInstance(args[1])) {
-    key_cert_pair.private_key = ::node::Buffer::Data(args[1]);
-  } else if (!(args[1]->IsNull() || args[1]->IsUndefined())) {
-    return NanThrowTypeError(
+  if (::node::Buffer::HasInstance(info[1])) {
+    key_cert_pair.private_key = ::node::Buffer::Data(info[1]);
+  } else if (!(info[1]->IsNull() || info[1]->IsUndefined())) {
+    return Nan::ThrowTypeError(
         "createSSl's second argument must be a Buffer if provided");
   }
-  if (::node::Buffer::HasInstance(args[2])) {
-    key_cert_pair.cert_chain = ::node::Buffer::Data(args[2]);
-  } else if (!(args[2]->IsNull() || args[2]->IsUndefined())) {
-    return NanThrowTypeError(
+  if (::node::Buffer::HasInstance(info[2])) {
+    key_cert_pair.cert_chain = ::node::Buffer::Data(info[2]);
+  } else if (!(info[2]->IsNull() || info[2]->IsUndefined())) {
+    return Nan::ThrowTypeError(
         "createSSl's third argument must be a Buffer if provided");
   }
   grpc_credentials *creds = grpc_ssl_credentials_create(
       root_certs, key_cert_pair.private_key == NULL ? NULL : &key_cert_pair,
       NULL);
   if (creds == NULL) {
-    NanReturnNull();
+    info.GetReturnValue().SetNull();
+  } else {
+    info.GetReturnValue().Set(WrapStruct(creds));
   }
-  NanReturnValue(WrapStruct(creds));
 }
 
 NAN_METHOD(Credentials::CreateComposite) {
-  NanScope();
-  if (!HasInstance(args[0])) {
-    return NanThrowTypeError(
+  if (!HasInstance(info[0])) {
+    return Nan::ThrowTypeError(
         "createComposite's first argument must be a Credentials object");
   }
-  if (!HasInstance(args[1])) {
-    return NanThrowTypeError(
+  if (!HasInstance(info[1])) {
+    return Nan::ThrowTypeError(
         "createComposite's second argument must be a Credentials object");
   }
-  Credentials *creds1 = ObjectWrap::Unwrap<Credentials>(args[0]->ToObject());
-  Credentials *creds2 = ObjectWrap::Unwrap<Credentials>(args[1]->ToObject());
+  Credentials *creds1 = ObjectWrap::Unwrap<Credentials>(
+      Nan::To<Object>(info[0]).ToLocalChecked());
+  Credentials *creds2 = ObjectWrap::Unwrap<Credentials>(
+      Nan::To<Object>(info[1]).ToLocalChecked());
   grpc_credentials *creds = grpc_composite_credentials_create(
       creds1->wrapped_credentials, creds2->wrapped_credentials, NULL);
   if (creds == NULL) {
-    NanReturnNull();
+    info.GetReturnValue().SetNull();
+  } else {
+    info.GetReturnValue().Set(WrapStruct(creds));
   }
-  NanReturnValue(WrapStruct(creds));
 }
 
 NAN_METHOD(Credentials::CreateGce) {
-  NanScope();
+  Nan::HandleScope scope;
   grpc_credentials *creds = grpc_google_compute_engine_credentials_create(NULL);
   if (creds == NULL) {
-    NanReturnNull();
+    info.GetReturnValue().SetNull();
+  } else {
+    info.GetReturnValue().Set(WrapStruct(creds));
   }
-  NanReturnValue(WrapStruct(creds));
 }
 
 NAN_METHOD(Credentials::CreateIam) {
-  NanScope();
-  if (!args[0]->IsString()) {
-    return NanThrowTypeError("createIam's first argument must be a string");
+  if (!info[0]->IsString()) {
+    return Nan::ThrowTypeError("createIam's first argument must be a string");
   }
-  if (!args[1]->IsString()) {
-    return NanThrowTypeError("createIam's second argument must be a string");
+  if (!info[1]->IsString()) {
+    return Nan::ThrowTypeError("createIam's second argument must be a string");
   }
-  NanUtf8String auth_token(args[0]);
-  NanUtf8String auth_selector(args[1]);
+  Utf8String auth_token(info[0]);
+  Utf8String auth_selector(info[1]);
   grpc_credentials *creds =
       grpc_google_iam_credentials_create(*auth_token, *auth_selector, NULL);
   if (creds == NULL) {
-    NanReturnNull();
+    info.GetReturnValue().SetNull();
+  } else {
+    info.GetReturnValue().Set(WrapStruct(creds));
   }
-  NanReturnValue(WrapStruct(creds));
 }
 
 NAN_METHOD(Credentials::CreateInsecure) {
-  NanScope();
-  NanReturnValue(WrapStruct(NULL));
+  info.GetReturnValue().Set(WrapStruct(NULL));
 }
 
 }  // namespace node

src/node/ext/credentials.h

@@ -43,12 +43,12 @@ namespace grpc {
 namespace node {
 
 /* Wrapper class for grpc_credentials structs */
-class Credentials : public ::node::ObjectWrap {
+class Credentials : public Nan::ObjectWrap {
  public:
-  static void Init(v8::Handle<v8::Object> exports);
-  static bool HasInstance(v8::Handle<v8::Value> val);
+  static void Init(v8::Local<v8::Object> exports);
+  static bool HasInstance(v8::Local<v8::Value> val);
   /* Wrap a grpc_credentials struct in a javascript object */
-  static v8::Handle<v8::Value> WrapStruct(grpc_credentials *credentials);
+  static v8::Local<v8::Value> WrapStruct(grpc_credentials *credentials);
 
   /* Returns the grpc_credentials struct that this object wraps */
   grpc_credentials *GetWrappedCredentials();
@@ -69,9 +69,9 @@ class Credentials : public ::node::ObjectWrap {
   static NAN_METHOD(CreateFake);
   static NAN_METHOD(CreateIam);
   static NAN_METHOD(CreateInsecure);
-  static NanCallback *constructor;
+  static Nan::Callback *constructor;
   // Used for typechecking instances of this javascript class
-  static v8::Persistent<v8::FunctionTemplate> fun_tpl;
+  static Nan::Persistent<v8::FunctionTemplate> fun_tpl;
 
   grpc_credentials *wrapped_credentials;
 };

src/node/ext/node_grpc.cc

@@ -43,171 +43,194 @@
 #include "credentials.h"
 #include "server_credentials.h"
 
-using v8::Handle;
+using v8::Local;
 using v8::Value;
 using v8::Object;
 using v8::Uint32;
 using v8::String;
 
-void InitStatusConstants(Handle<Object> exports) {
-  NanScope();
-  Handle<Object> status = NanNew<Object>();
-  exports->Set(NanNew("status"), status);
-  Handle<Value> OK(NanNew<Uint32, uint32_t>(GRPC_STATUS_OK));
-  status->Set(NanNew("OK"), OK);
-  Handle<Value> CANCELLED(NanNew<Uint32, uint32_t>(GRPC_STATUS_CANCELLED));
-  status->Set(NanNew("CANCELLED"), CANCELLED);
-  Handle<Value> UNKNOWN(NanNew<Uint32, uint32_t>(GRPC_STATUS_UNKNOWN));
-  status->Set(NanNew("UNKNOWN"), UNKNOWN);
-  Handle<Value> INVALID_ARGUMENT(
-      NanNew<Uint32, uint32_t>(GRPC_STATUS_INVALID_ARGUMENT));
-  status->Set(NanNew("INVALID_ARGUMENT"), INVALID_ARGUMENT);
-  Handle<Value> DEADLINE_EXCEEDED(
-      NanNew<Uint32, uint32_t>(GRPC_STATUS_DEADLINE_EXCEEDED));
-  status->Set(NanNew("DEADLINE_EXCEEDED"), DEADLINE_EXCEEDED);
-  Handle<Value> NOT_FOUND(NanNew<Uint32, uint32_t>(GRPC_STATUS_NOT_FOUND));
-  status->Set(NanNew("NOT_FOUND"), NOT_FOUND);
-  Handle<Value> ALREADY_EXISTS(
-      NanNew<Uint32, uint32_t>(GRPC_STATUS_ALREADY_EXISTS));
-  status->Set(NanNew("ALREADY_EXISTS"), ALREADY_EXISTS);
-  Handle<Value> PERMISSION_DENIED(
-      NanNew<Uint32, uint32_t>(GRPC_STATUS_PERMISSION_DENIED));
-  status->Set(NanNew("PERMISSION_DENIED"), PERMISSION_DENIED);
-  Handle<Value> UNAUTHENTICATED(
-      NanNew<Uint32, uint32_t>(GRPC_STATUS_UNAUTHENTICATED));
-  status->Set(NanNew("UNAUTHENTICATED"), UNAUTHENTICATED);
-  Handle<Value> RESOURCE_EXHAUSTED(
-      NanNew<Uint32, uint32_t>(GRPC_STATUS_RESOURCE_EXHAUSTED));
-  status->Set(NanNew("RESOURCE_EXHAUSTED"), RESOURCE_EXHAUSTED);
-  Handle<Value> FAILED_PRECONDITION(
-      NanNew<Uint32, uint32_t>(GRPC_STATUS_FAILED_PRECONDITION));
-  status->Set(NanNew("FAILED_PRECONDITION"), FAILED_PRECONDITION);
-  Handle<Value> ABORTED(NanNew<Uint32, uint32_t>(GRPC_STATUS_ABORTED));
-  status->Set(NanNew("ABORTED"), ABORTED);
-  Handle<Value> OUT_OF_RANGE(
-      NanNew<Uint32, uint32_t>(GRPC_STATUS_OUT_OF_RANGE));
-  status->Set(NanNew("OUT_OF_RANGE"), OUT_OF_RANGE);
-  Handle<Value> UNIMPLEMENTED(
-      NanNew<Uint32, uint32_t>(GRPC_STATUS_UNIMPLEMENTED));
-  status->Set(NanNew("UNIMPLEMENTED"), UNIMPLEMENTED);
-  Handle<Value> INTERNAL(NanNew<Uint32, uint32_t>(GRPC_STATUS_INTERNAL));
-  status->Set(NanNew("INTERNAL"), INTERNAL);
-  Handle<Value> UNAVAILABLE(NanNew<Uint32, uint32_t>(GRPC_STATUS_UNAVAILABLE));
-  status->Set(NanNew("UNAVAILABLE"), UNAVAILABLE);
-  Handle<Value> DATA_LOSS(NanNew<Uint32, uint32_t>(GRPC_STATUS_DATA_LOSS));
-  status->Set(NanNew("DATA_LOSS"), DATA_LOSS);
+void InitStatusConstants(Local<Object> exports) {
+  Nan::HandleScope scope;
+  Local<Object> status = Nan::New<Object>();
+  Nan::Set(exports, Nan::New("status").ToLocalChecked(), status);
+  Local<Value> OK(Nan::New<Uint32, uint32_t>(GRPC_STATUS_OK));
+  Nan::Set(status, Nan::New("OK").ToLocalChecked(), OK);
+  Local<Value> CANCELLED(Nan::New<Uint32, uint32_t>(GRPC_STATUS_CANCELLED));
+  Nan::Set(status, Nan::New("CANCELLED").ToLocalChecked(), CANCELLED);
+  Local<Value> UNKNOWN(Nan::New<Uint32, uint32_t>(GRPC_STATUS_UNKNOWN));
+  Nan::Set(status, Nan::New("UNKNOWN").ToLocalChecked(), UNKNOWN);
+  Local<Value> INVALID_ARGUMENT(
+      Nan::New<Uint32, uint32_t>(GRPC_STATUS_INVALID_ARGUMENT));
+  Nan::Set(status, Nan::New("INVALID_ARGUMENT").ToLocalChecked(),
+           INVALID_ARGUMENT);
+  Local<Value> DEADLINE_EXCEEDED(
+      Nan::New<Uint32, uint32_t>(GRPC_STATUS_DEADLINE_EXCEEDED));
+  Nan::Set(status, Nan::New("DEADLINE_EXCEEDED").ToLocalChecked(),
+           DEADLINE_EXCEEDED);
+  Local<Value> NOT_FOUND(Nan::New<Uint32, uint32_t>(GRPC_STATUS_NOT_FOUND));
+  Nan::Set(status, Nan::New("NOT_FOUND").ToLocalChecked(), NOT_FOUND);
+  Local<Value> ALREADY_EXISTS(
+      Nan::New<Uint32, uint32_t>(GRPC_STATUS_ALREADY_EXISTS));
+  Nan::Set(status, Nan::New("ALREADY_EXISTS").ToLocalChecked(), ALREADY_EXISTS);
+  Local<Value> PERMISSION_DENIED(
+      Nan::New<Uint32, uint32_t>(GRPC_STATUS_PERMISSION_DENIED));
+  Nan::Set(status, Nan::New("PERMISSION_DENIED").ToLocalChecked(),
+           PERMISSION_DENIED);
+  Local<Value> UNAUTHENTICATED(
+      Nan::New<Uint32, uint32_t>(GRPC_STATUS_UNAUTHENTICATED));
+  Nan::Set(status, Nan::New("UNAUTHENTICATED").ToLocalChecked(),
+           UNAUTHENTICATED);
+  Local<Value> RESOURCE_EXHAUSTED(
+      Nan::New<Uint32, uint32_t>(GRPC_STATUS_RESOURCE_EXHAUSTED));
+  Nan::Set(status, Nan::New("RESOURCE_EXHAUSTED").ToLocalChecked(),
+           RESOURCE_EXHAUSTED);
+  Local<Value> FAILED_PRECONDITION(
+      Nan::New<Uint32, uint32_t>(GRPC_STATUS_FAILED_PRECONDITION));
+  Nan::Set(status, Nan::New("FAILED_PRECONDITION").ToLocalChecked(),
+           FAILED_PRECONDITION);
+  Local<Value> ABORTED(Nan::New<Uint32, uint32_t>(GRPC_STATUS_ABORTED));
+  Nan::Set(status, Nan::New("ABORTED").ToLocalChecked(), ABORTED);
+  Local<Value> OUT_OF_RANGE(
+      Nan::New<Uint32, uint32_t>(GRPC_STATUS_OUT_OF_RANGE));
+  Nan::Set(status, Nan::New("OUT_OF_RANGE").ToLocalChecked(), OUT_OF_RANGE);
+  Local<Value> UNIMPLEMENTED(
+      Nan::New<Uint32, uint32_t>(GRPC_STATUS_UNIMPLEMENTED));
+  Nan::Set(status, Nan::New("UNIMPLEMENTED").ToLocalChecked(), UNIMPLEMENTED);
+  Local<Value> INTERNAL(Nan::New<Uint32, uint32_t>(GRPC_STATUS_INTERNAL));
+  Nan::Set(status, Nan::New("INTERNAL").ToLocalChecked(), INTERNAL);
+  Local<Value> UNAVAILABLE(Nan::New<Uint32, uint32_t>(GRPC_STATUS_UNAVAILABLE));
+  Nan::Set(status, Nan::New("UNAVAILABLE").ToLocalChecked(), UNAVAILABLE);
+  Local<Value> DATA_LOSS(Nan::New<Uint32, uint32_t>(GRPC_STATUS_DATA_LOSS));
+  Nan::Set(status, Nan::New("DATA_LOSS").ToLocalChecked(), DATA_LOSS);
 }
 
-void InitCallErrorConstants(Handle<Object> exports) {
-  NanScope();
-  Handle<Object> call_error = NanNew<Object>();
-  exports->Set(NanNew("callError"), call_error);
-  Handle<Value> OK(NanNew<Uint32, uint32_t>(GRPC_CALL_OK));
-  call_error->Set(NanNew("OK"), OK);
-  Handle<Value> ERROR(NanNew<Uint32, uint32_t>(GRPC_CALL_ERROR));
-  call_error->Set(NanNew("ERROR"), ERROR);
-  Handle<Value> NOT_ON_SERVER(
-      NanNew<Uint32, uint32_t>(GRPC_CALL_ERROR_NOT_ON_SERVER));
-  call_error->Set(NanNew("NOT_ON_SERVER"), NOT_ON_SERVER);
-  Handle<Value> NOT_ON_CLIENT(
-      NanNew<Uint32, uint32_t>(GRPC_CALL_ERROR_NOT_ON_CLIENT));
-  call_error->Set(NanNew("NOT_ON_CLIENT"), NOT_ON_CLIENT);
-  Handle<Value> ALREADY_INVOKED(
-      NanNew<Uint32, uint32_t>(GRPC_CALL_ERROR_ALREADY_INVOKED));
-  call_error->Set(NanNew("ALREADY_INVOKED"), ALREADY_INVOKED);
-  Handle<Value> NOT_INVOKED(
-      NanNew<Uint32, uint32_t>(GRPC_CALL_ERROR_NOT_INVOKED));
-  call_error->Set(NanNew("NOT_INVOKED"), NOT_INVOKED);
-  Handle<Value> ALREADY_FINISHED(
-      NanNew<Uint32, uint32_t>(GRPC_CALL_ERROR_ALREADY_FINISHED));
-  call_error->Set(NanNew("ALREADY_FINISHED"), ALREADY_FINISHED);
-  Handle<Value> TOO_MANY_OPERATIONS(
-      NanNew<Uint32, uint32_t>(GRPC_CALL_ERROR_TOO_MANY_OPERATIONS));
-  call_error->Set(NanNew("TOO_MANY_OPERATIONS"), TOO_MANY_OPERATIONS);
-  Handle<Value> INVALID_FLAGS(
-      NanNew<Uint32, uint32_t>(GRPC_CALL_ERROR_INVALID_FLAGS));
-  call_error->Set(NanNew("INVALID_FLAGS"), INVALID_FLAGS);
+void InitCallErrorConstants(Local<Object> exports) {
+  Nan::HandleScope scope;
+  Local<Object> call_error = Nan::New<Object>();
+  Nan::Set(exports, Nan::New("callError").ToLocalChecked(), call_error);
+  Local<Value> OK(Nan::New<Uint32, uint32_t>(GRPC_CALL_OK));
+  Nan::Set(call_error, Nan::New("OK").ToLocalChecked(), OK);
+  Local<Value> ERROR(Nan::New<Uint32, uint32_t>(GRPC_CALL_ERROR));
+  Nan::Set(call_error, Nan::New("ERROR").ToLocalChecked(), ERROR);
+  Local<Value> NOT_ON_SERVER(
+      Nan::New<Uint32, uint32_t>(GRPC_CALL_ERROR_NOT_ON_SERVER));
+  Nan::Set(call_error, Nan::New("NOT_ON_SERVER").ToLocalChecked(),
+           NOT_ON_SERVER);
+  Local<Value> NOT_ON_CLIENT(
+      Nan::New<Uint32, uint32_t>(GRPC_CALL_ERROR_NOT_ON_CLIENT));
+  Nan::Set(call_error, Nan::New("NOT_ON_CLIENT").ToLocalChecked(),
+           NOT_ON_CLIENT);
+  Local<Value> ALREADY_INVOKED(
+      Nan::New<Uint32, uint32_t>(GRPC_CALL_ERROR_ALREADY_INVOKED));
+  Nan::Set(call_error, Nan::New("ALREADY_INVOKED").ToLocalChecked(),
+           ALREADY_INVOKED);
+  Local<Value> NOT_INVOKED(
+      Nan::New<Uint32, uint32_t>(GRPC_CALL_ERROR_NOT_INVOKED));
+  Nan::Set(call_error, Nan::New("NOT_INVOKED").ToLocalChecked(), NOT_INVOKED);
+  Local<Value> ALREADY_FINISHED(
+      Nan::New<Uint32, uint32_t>(GRPC_CALL_ERROR_ALREADY_FINISHED));
+  Nan::Set(call_error, Nan::New("ALREADY_FINISHED").ToLocalChecked(),
+           ALREADY_FINISHED);
+  Local<Value> TOO_MANY_OPERATIONS(
+      Nan::New<Uint32, uint32_t>(GRPC_CALL_ERROR_TOO_MANY_OPERATIONS));
+  Nan::Set(call_error, Nan::New("TOO_MANY_OPERATIONS").ToLocalChecked(),
+           TOO_MANY_OPERATIONS);
+  Local<Value> INVALID_FLAGS(
+      Nan::New<Uint32, uint32_t>(GRPC_CALL_ERROR_INVALID_FLAGS));
+  Nan::Set(call_error, Nan::New("INVALID_FLAGS").ToLocalChecked(),
+           INVALID_FLAGS);
 }
 
-void InitOpTypeConstants(Handle<Object> exports) {
-  NanScope();
-  Handle<Object> op_type = NanNew<Object>();
-  exports->Set(NanNew("opType"), op_type);
-  Handle<Value> SEND_INITIAL_METADATA(
-      NanNew<Uint32, uint32_t>(GRPC_OP_SEND_INITIAL_METADATA));
-  op_type->Set(NanNew("SEND_INITIAL_METADATA"), SEND_INITIAL_METADATA);
-  Handle<Value> SEND_MESSAGE(
-      NanNew<Uint32, uint32_t>(GRPC_OP_SEND_MESSAGE));
-  op_type->Set(NanNew("SEND_MESSAGE"), SEND_MESSAGE);
-  Handle<Value> SEND_CLOSE_FROM_CLIENT(
-      NanNew<Uint32, uint32_t>(GRPC_OP_SEND_CLOSE_FROM_CLIENT));
-  op_type->Set(NanNew("SEND_CLOSE_FROM_CLIENT"), SEND_CLOSE_FROM_CLIENT);
-  Handle<Value> SEND_STATUS_FROM_SERVER(
-      NanNew<Uint32, uint32_t>(GRPC_OP_SEND_STATUS_FROM_SERVER));
-  op_type->Set(NanNew("SEND_STATUS_FROM_SERVER"), SEND_STATUS_FROM_SERVER);
-  Handle<Value> RECV_INITIAL_METADATA(
-      NanNew<Uint32, uint32_t>(GRPC_OP_RECV_INITIAL_METADATA));
-  op_type->Set(NanNew("RECV_INITIAL_METADATA"), RECV_INITIAL_METADATA);
-  Handle<Value> RECV_MESSAGE(
-      NanNew<Uint32, uint32_t>(GRPC_OP_RECV_MESSAGE));
-  op_type->Set(NanNew("RECV_MESSAGE"), RECV_MESSAGE);
-  Handle<Value> RECV_STATUS_ON_CLIENT(
-      NanNew<Uint32, uint32_t>(GRPC_OP_RECV_STATUS_ON_CLIENT));
-  op_type->Set(NanNew("RECV_STATUS_ON_CLIENT"), RECV_STATUS_ON_CLIENT);
-  Handle<Value> RECV_CLOSE_ON_SERVER(
-      NanNew<Uint32, uint32_t>(GRPC_OP_RECV_CLOSE_ON_SERVER));
-  op_type->Set(NanNew("RECV_CLOSE_ON_SERVER"), RECV_CLOSE_ON_SERVER);
+void InitOpTypeConstants(Local<Object> exports) {
+  Nan::HandleScope scope;
+  Local<Object> op_type = Nan::New<Object>();
+  Nan::Set(exports, Nan::New("opType").ToLocalChecked(), op_type);
+  Local<Value> SEND_INITIAL_METADATA(
+      Nan::New<Uint32, uint32_t>(GRPC_OP_SEND_INITIAL_METADATA));
+  Nan::Set(op_type, Nan::New("SEND_INITIAL_METADATA").ToLocalChecked(),
+           SEND_INITIAL_METADATA);
+  Local<Value> SEND_MESSAGE(
+      Nan::New<Uint32, uint32_t>(GRPC_OP_SEND_MESSAGE));
+  Nan::Set(op_type, Nan::New("SEND_MESSAGE").ToLocalChecked(), SEND_MESSAGE);
+  Local<Value> SEND_CLOSE_FROM_CLIENT(
+      Nan::New<Uint32, uint32_t>(GRPC_OP_SEND_CLOSE_FROM_CLIENT));
+  Nan::Set(op_type, Nan::New("SEND_CLOSE_FROM_CLIENT").ToLocalChecked(),
+           SEND_CLOSE_FROM_CLIENT);
+  Local<Value> SEND_STATUS_FROM_SERVER(
+      Nan::New<Uint32, uint32_t>(GRPC_OP_SEND_STATUS_FROM_SERVER));
+  Nan::Set(op_type, Nan::New("SEND_STATUS_FROM_SERVER").ToLocalChecked(),
+           SEND_STATUS_FROM_SERVER);
+  Local<Value> RECV_INITIAL_METADATA(
+      Nan::New<Uint32, uint32_t>(GRPC_OP_RECV_INITIAL_METADATA));
+  Nan::Set(op_type, Nan::New("RECV_INITIAL_METADATA").ToLocalChecked(),
+           RECV_INITIAL_METADATA);
+  Local<Value> RECV_MESSAGE(
+      Nan::New<Uint32, uint32_t>(GRPC_OP_RECV_MESSAGE));
+  Nan::Set(op_type, Nan::New("RECV_MESSAGE").ToLocalChecked(), RECV_MESSAGE);
+  Local<Value> RECV_STATUS_ON_CLIENT(
+      Nan::New<Uint32, uint32_t>(GRPC_OP_RECV_STATUS_ON_CLIENT));
+  Nan::Set(op_type, Nan::New("RECV_STATUS_ON_CLIENT").ToLocalChecked(),
+           RECV_STATUS_ON_CLIENT);
+  Local<Value> RECV_CLOSE_ON_SERVER(
+      Nan::New<Uint32, uint32_t>(GRPC_OP_RECV_CLOSE_ON_SERVER));
+  Nan::Set(op_type, Nan::New("RECV_CLOSE_ON_SERVER").ToLocalChecked(),
+           RECV_CLOSE_ON_SERVER);
 }
 
-void InitPropagateConstants(Handle<Object> exports) {
-  NanScope();
-  Handle<Object> propagate = NanNew<Object>();
-  exports->Set(NanNew("propagate"), propagate);
-  Handle<Value> DEADLINE(NanNew<Uint32, uint32_t>(GRPC_PROPAGATE_DEADLINE));
-  propagate->Set(NanNew("DEADLINE"), DEADLINE);
-  Handle<Value> CENSUS_STATS_CONTEXT(
-      NanNew<Uint32, uint32_t>(GRPC_PROPAGATE_CENSUS_STATS_CONTEXT));
-  propagate->Set(NanNew("CENSUS_STATS_CONTEXT"), CENSUS_STATS_CONTEXT);
-  Handle<Value> CENSUS_TRACING_CONTEXT(
-      NanNew<Uint32, uint32_t>(GRPC_PROPAGATE_CENSUS_TRACING_CONTEXT));
-  propagate->Set(NanNew("CENSUS_TRACING_CONTEXT"), CENSUS_TRACING_CONTEXT);
-  Handle<Value> CANCELLATION(
-      NanNew<Uint32, uint32_t>(GRPC_PROPAGATE_CANCELLATION));
-  propagate->Set(NanNew("CANCELLATION"), CANCELLATION);
-  Handle<Value> DEFAULTS(NanNew<Uint32, uint32_t>(GRPC_PROPAGATE_DEFAULTS));
-  propagate->Set(NanNew("DEFAULTS"), DEFAULTS);
+void InitPropagateConstants(Local<Object> exports) {
+  Nan::HandleScope scope;
+  Local<Object> propagate = Nan::New<Object>();
+  Nan::Set(exports, Nan::New("propagate").ToLocalChecked(), propagate);
+  Local<Value> DEADLINE(Nan::New<Uint32, uint32_t>(GRPC_PROPAGATE_DEADLINE));
+  Nan::Set(propagate, Nan::New("DEADLINE").ToLocalChecked(), DEADLINE);
+  Local<Value> CENSUS_STATS_CONTEXT(
+      Nan::New<Uint32, uint32_t>(GRPC_PROPAGATE_CENSUS_STATS_CONTEXT));
+  Nan::Set(propagate, Nan::New("CENSUS_STATS_CONTEXT").ToLocalChecked(),
+           CENSUS_STATS_CONTEXT);
+  Local<Value> CENSUS_TRACING_CONTEXT(
+      Nan::New<Uint32, uint32_t>(GRPC_PROPAGATE_CENSUS_TRACING_CONTEXT));
+  Nan::Set(propagate, Nan::New("CENSUS_TRACING_CONTEXT").ToLocalChecked(),
+           CENSUS_TRACING_CONTEXT);
+  Local<Value> CANCELLATION(
+      Nan::New<Uint32, uint32_t>(GRPC_PROPAGATE_CANCELLATION));
+  Nan::Set(propagate, Nan::New("CANCELLATION").ToLocalChecked(), CANCELLATION);
+  Local<Value> DEFAULTS(Nan::New<Uint32, uint32_t>(GRPC_PROPAGATE_DEFAULTS));
+  Nan::Set(propagate, Nan::New("DEFAULTS").ToLocalChecked(), DEFAULTS);
 }
 
-void InitConnectivityStateConstants(Handle<Object> exports) {
-  NanScope();
-  Handle<Object> channel_state = NanNew<Object>();
-  exports->Set(NanNew("connectivityState"), channel_state);
-  Handle<Value> IDLE(NanNew<Uint32, uint32_t>(GRPC_CHANNEL_IDLE));
-  channel_state->Set(NanNew("IDLE"), IDLE);
-  Handle<Value> CONNECTING(NanNew<Uint32, uint32_t>(GRPC_CHANNEL_CONNECTING));
-  channel_state->Set(NanNew("CONNECTING"), CONNECTING);
-  Handle<Value> READY(NanNew<Uint32, uint32_t>(GRPC_CHANNEL_READY));
-  channel_state->Set(NanNew("READY"), READY);
-  Handle<Value> TRANSIENT_FAILURE(
-      NanNew<Uint32, uint32_t>(GRPC_CHANNEL_TRANSIENT_FAILURE));
-  channel_state->Set(NanNew("TRANSIENT_FAILURE"), TRANSIENT_FAILURE);
-  Handle<Value> FATAL_FAILURE(
-      NanNew<Uint32, uint32_t>(GRPC_CHANNEL_FATAL_FAILURE));
-  channel_state->Set(NanNew("FATAL_FAILURE"), FATAL_FAILURE);
+void InitConnectivityStateConstants(Local<Object> exports) {
+  Nan::HandleScope scope;
+  Local<Object> channel_state = Nan::New<Object>();
+  Nan::Set(exports, Nan::New("connectivityState").ToLocalChecked(),
+           channel_state);
+  Local<Value> IDLE(Nan::New<Uint32, uint32_t>(GRPC_CHANNEL_IDLE));
+  Nan::Set(channel_state, Nan::New("IDLE").ToLocalChecked(), IDLE);
+  Local<Value> CONNECTING(Nan::New<Uint32, uint32_t>(GRPC_CHANNEL_CONNECTING));
+  Nan::Set(channel_state, Nan::New("CONNECTING").ToLocalChecked(), CONNECTING);
+  Local<Value> READY(Nan::New<Uint32, uint32_t>(GRPC_CHANNEL_READY));
+  Nan::Set(channel_state, Nan::New("READY").ToLocalChecked(), READY);
+  Local<Value> TRANSIENT_FAILURE(
+      Nan::New<Uint32, uint32_t>(GRPC_CHANNEL_TRANSIENT_FAILURE));
+  Nan::Set(channel_state, Nan::New("TRANSIENT_FAILURE").ToLocalChecked(),
+           TRANSIENT_FAILURE);
+  Local<Value> FATAL_FAILURE(
+      Nan::New<Uint32, uint32_t>(GRPC_CHANNEL_FATAL_FAILURE));
+  Nan::Set(channel_state, Nan::New("FATAL_FAILURE").ToLocalChecked(),
+           FATAL_FAILURE);
 }
 
-void InitWriteFlags(Handle<Object> exports) {
-  NanScope();
-  Handle<Object> write_flags = NanNew<Object>();
-  exports->Set(NanNew("writeFlags"), write_flags);
-  Handle<Value> BUFFER_HINT(NanNew<Uint32, uint32_t>(GRPC_WRITE_BUFFER_HINT));
-  write_flags->Set(NanNew("BUFFER_HINT"), BUFFER_HINT);
-  Handle<Value> NO_COMPRESS(NanNew<Uint32, uint32_t>(GRPC_WRITE_NO_COMPRESS));
-  write_flags->Set(NanNew("NO_COMPRESS"), NO_COMPRESS);
+void InitWriteFlags(Local<Object> exports) {
+  Nan::HandleScope scope;
+  Local<Object> write_flags = Nan::New<Object>();
+  Nan::Set(exports, Nan::New("writeFlags").ToLocalChecked(), write_flags);
+  Local<Value> BUFFER_HINT(Nan::New<Uint32, uint32_t>(GRPC_WRITE_BUFFER_HINT));
+  Nan::Set(write_flags, Nan::New("BUFFER_HINT").ToLocalChecked(), BUFFER_HINT);
+  Local<Value> NO_COMPRESS(Nan::New<Uint32, uint32_t>(GRPC_WRITE_NO_COMPRESS));
+  Nan::Set(write_flags, Nan::New("NO_COMPRESS").ToLocalChecked(), NO_COMPRESS);
 }
 
-void init(Handle<Object> exports) {
-  NanScope();
+void init(Local<Object> exports) {
+  Nan::HandleScope scope;
   grpc_init();
   InitStatusConstants(exports);
   InitCallErrorConstants(exports);

src/node/ext/server.cc

@@ -50,6 +50,15 @@
 namespace grpc {
 namespace node {
 
+using Nan::Callback;
+using Nan::EscapableHandleScope;
+using Nan::HandleScope;
+using Nan::Maybe;
+using Nan::MaybeLocal;
+using Nan::ObjectWrap;
+using Nan::Persistent;
+using Nan::Utf8String;
+
 using std::unique_ptr;
 using v8::Array;
 using v8::Boolean;
@@ -57,16 +66,13 @@ using v8::Date;
 using v8::Exception;
 using v8::Function;
 using v8::FunctionTemplate;
-using v8::Handle;
-using v8::HandleScope;
 using v8::Local;
 using v8::Number;
 using v8::Object;
-using v8::Persistent;
 using v8::String;
 using v8::Value;
 
-NanCallback *Server::constructor;
+Nan::Callback *Server::constructor;
 Persistent<FunctionTemplate> Server::fun_tpl;
 
 class NewCallOp : public Op {
@@ -82,22 +88,26 @@ class NewCallOp : public Op {
     grpc_metadata_array_destroy(&request_metadata);
   }
 
-  Handle<Value> GetNodeValue() const {
-    NanEscapableScope();
+  Local<Value> GetNodeValue() const {
+    Nan::EscapableHandleScope scope;
     if (call == NULL) {
-      return NanEscapeScope(NanNull());
+      return scope.Escape(Nan::Null());
     }
-    Handle<Object> obj = NanNew<Object>();
-    obj->Set(NanNew("call"), Call::WrapStruct(call));
-    obj->Set(NanNew("method"), NanNew(details.method));
-    obj->Set(NanNew("host"), NanNew(details.host));
-    obj->Set(NanNew("deadline"),
-             NanNew<Date>(TimespecToMilliseconds(details.deadline)));
-    obj->Set(NanNew("metadata"), ParseMetadata(&request_metadata));
-    return NanEscapeScope(obj);
+    Local<Object> obj = Nan::New<Object>();
+    Nan::Set(obj, Nan::New("call").ToLocalChecked(), Call::WrapStruct(call));
+    Nan::Set(obj, Nan::New("method").ToLocalChecked(),
+             Nan::New(details.method).ToLocalChecked());
+    Nan::Set(obj, Nan::New("host").ToLocalChecked(),
+             Nan::New(details.host).ToLocalChecked());
+    Nan::Set(obj, Nan::New("deadline").ToLocalChecked(),
+             Nan::New<Date>(
+                 TimespecToMilliseconds(details.deadline)).ToLocalChecked());
+    Nan::Set(obj, Nan::New("metadata").ToLocalChecked(),
+             ParseMetadata(&request_metadata));
+    return scope.Escape(obj);
   }
 
-  bool ParseOp(Handle<Value> value, grpc_op *out,
+  bool ParseOp(Local<Value> value, grpc_op *out,
                shared_ptr<Resources> resources) {
     return true;
   }
@@ -124,35 +134,25 @@ Server::~Server() {
   grpc_completion_queue_destroy(this->shutdown_queue);
 }
 
-void Server::Init(Handle<Object> exports) {
-  NanScope();
-  Local<FunctionTemplate> tpl = NanNew<FunctionTemplate>(New);
-  tpl->SetClassName(NanNew("Server"));
+void Server::Init(Local<Object> exports) {
+  HandleScope scope;
+  Local<FunctionTemplate> tpl = Nan::New<FunctionTemplate>(New);
+  tpl->SetClassName(Nan::New("Server").ToLocalChecked());
   tpl->InstanceTemplate()->SetInternalFieldCount(1);
-  NanSetPrototypeTemplate(tpl, "requestCall",
-                          NanNew<FunctionTemplate>(RequestCall)->GetFunction());
-
-  NanSetPrototypeTemplate(
-      tpl, "addHttp2Port",
-      NanNew<FunctionTemplate>(AddHttp2Port)->GetFunction());
-
-  NanSetPrototypeTemplate(tpl, "start",
-                          NanNew<FunctionTemplate>(Start)->GetFunction());
-
-  NanSetPrototypeTemplate(tpl, "tryShutdown",
-                          NanNew<FunctionTemplate>(TryShutdown)->GetFunction());
-  NanSetPrototypeTemplate(
-      tpl, "forceShutdown",
-      NanNew<FunctionTemplate>(ForceShutdown)->GetFunction());
-
-  NanAssignPersistent(fun_tpl, tpl);
-  Handle<Function> ctr = tpl->GetFunction();
-  constructor = new NanCallback(ctr);
-  exports->Set(NanNew("Server"), ctr);
+  Nan::SetPrototypeMethod(tpl, "requestCall", RequestCall);
+  Nan::SetPrototypeMethod(tpl, "addHttp2Port", AddHttp2Port);
+  Nan::SetPrototypeMethod(tpl, "start", Start);
+  Nan::SetPrototypeMethod(tpl, "tryShutdown", TryShutdown);
+  Nan::SetPrototypeMethod(tpl, "forceShutdown", ForceShutdown);
+  fun_tpl.Reset(tpl);
+  Local<Function> ctr = Nan::GetFunction(tpl).ToLocalChecked();
+  Nan::Set(exports, Nan::New("Server").ToLocalChecked(), ctr);
+  constructor = new Callback(ctr);
 }
 
-bool Server::HasInstance(Handle<Value> val) {
-  return NanHasInstance(fun_tpl, val);
+bool Server::HasInstance(Local<Value> val) {
+  HandleScope scope;
+  return Nan::New(fun_tpl)->HasInstance(val);
 }
 
 void Server::ShutdownServer() {
@@ -165,64 +165,77 @@ void Server::ShutdownServer() {
 }
 
 NAN_METHOD(Server::New) {
-  NanScope();
-
   /* If this is not a constructor call, make a constructor call and return
      the result */
-  if (!args.IsConstructCall()) {
+  if (!info.IsConstructCall()) {
     const int argc = 1;
-    Local<Value> argv[argc] = {args[0]};
-    NanReturnValue(constructor->GetFunction()->NewInstance(argc, argv));
+    Local<Value> argv[argc] = {info[0]};
+    MaybeLocal<Object> maybe_instance = constructor->GetFunction()->NewInstance(
+        argc, argv);
+    if (maybe_instance.IsEmpty()) {
+      // There's probably a pending exception
+      return;
+    } else {
+      info.GetReturnValue().Set(maybe_instance.ToLocalChecked());
+      return;
+    }
   }
   grpc_server *wrapped_server;
   grpc_completion_queue *queue = CompletionQueueAsyncWorker::GetQueue();
-  if (args[0]->IsUndefined()) {
+  if (info[0]->IsUndefined()) {
     wrapped_server = grpc_server_create(NULL, NULL);
-  } else if (args[0]->IsObject()) {
-    Handle<Object> args_hash(args[0]->ToObject());
-    Handle<Array> keys(args_hash->GetOwnPropertyNames());
+  } else if (info[0]->IsObject()) {
+    Local<Object> args_hash = Nan::To<Object>(info[0]).ToLocalChecked();
+    Local<Array> keys = Nan::GetOwnPropertyNames(args_hash).ToLocalChecked();
     grpc_channel_args channel_args;
     channel_args.num_args = keys->Length();
     channel_args.args = reinterpret_cast<grpc_arg *>(
         calloc(channel_args.num_args, sizeof(grpc_arg)));
     /* These are used to keep all strings until then end of the block, then
        destroy them */
-    std::vector<NanUtf8String *> key_strings(keys->Length());
-    std::vector<NanUtf8String *> value_strings(keys->Length());
+    std::vector<Utf8String *> key_strings(keys->Length());
+    std::vector<Utf8String *> value_strings(keys->Length());
     for (unsigned int i = 0; i < channel_args.num_args; i++) {
-      Handle<String> current_key(keys->Get(i)->ToString());
-      Handle<Value> current_value(args_hash->Get(current_key));
-      key_strings[i] = new NanUtf8String(current_key);
+      MaybeLocal<String> maybe_key = Nan::To<String>(
+          Nan::Get(keys, i).ToLocalChecked());
+      if (maybe_key.IsEmpty()) {
+        free(channel_args.args);
+        return Nan::ThrowTypeError("Arg keys must be strings");
+      }
+      Local<String> current_key = maybe_key.ToLocalChecked();
+      Local<Value> current_value = Nan::Get(args_hash,
+                                             current_key).ToLocalChecked();
+      key_strings[i] = new Utf8String(current_key);
       channel_args.args[i].key = **key_strings[i];
       if (current_value->IsInt32()) {
         channel_args.args[i].type = GRPC_ARG_INTEGER;
-        channel_args.args[i].value.integer = current_value->Int32Value();
+        channel_args.args[i].value.integer = Nan::To<int32_t>(
+            current_value).FromJust();
       } else if (current_value->IsString()) {
         channel_args.args[i].type = GRPC_ARG_STRING;
-        value_strings[i] = new NanUtf8String(current_value);
+        value_strings[i] = new Utf8String(current_value);
         channel_args.args[i].value.string = **value_strings[i];
       } else {
         free(channel_args.args);
-        return NanThrowTypeError("Arg values must be strings");
+        return Nan::ThrowTypeError("Arg values must be strings");
       }
     }
     wrapped_server = grpc_server_create(&channel_args, NULL);
     free(channel_args.args);
   } else {
-    return NanThrowTypeError("Server expects an object");
+    return Nan::ThrowTypeError("Server expects an object");
   }
   grpc_server_register_completion_queue(wrapped_server, queue, NULL);
   Server *server = new Server(wrapped_server);
-  server->Wrap(args.This());
-  NanReturnValue(args.This());
+  server->Wrap(info.This());
+  info.GetReturnValue().Set(info.This());
 }
 
 NAN_METHOD(Server::RequestCall) {
-  NanScope();
-  if (!HasInstance(args.This())) {
-    return NanThrowTypeError("requestCall can only be called on a Server");
+  if (!HasInstance(info.This())) {
+    return Nan::ThrowTypeError("requestCall can only be called on a Server");
   }
-  Server *server = ObjectWrap::Unwrap<Server>(args.This());
+  Server *server = ObjectWrap::Unwrap<Server>(info.This());
   NewCallOp *op = new NewCallOp();
   unique_ptr<OpVec> ops(new OpVec());
   ops->push_back(unique_ptr<Op>(op));
@@ -230,79 +243,74 @@ NAN_METHOD(Server::RequestCall) {
       server->wrapped_server, &op->call, &op->details, &op->request_metadata,
       CompletionQueueAsyncWorker::GetQueue(),
       CompletionQueueAsyncWorker::GetQueue(),
-      new struct tag(new NanCallback(args[0].As<Function>()), ops.release(),
+      new struct tag(new Callback(info[0].As<Function>()), ops.release(),
                      shared_ptr<Resources>(nullptr)));
   if (error != GRPC_CALL_OK) {
-    return NanThrowError(nanErrorWithCode("requestCall failed", error));
+    return Nan::ThrowError(nanErrorWithCode("requestCall failed", error));
   }
   CompletionQueueAsyncWorker::Next();
-  NanReturnUndefined();
 }
 
 NAN_METHOD(Server::AddHttp2Port) {
-  NanScope();
-  if (!HasInstance(args.This())) {
-    return NanThrowTypeError(
+  if (!HasInstance(info.This())) {
+    return Nan::ThrowTypeError(
         "addHttp2Port can only be called on a Server");
   }
-  if (!args[0]->IsString()) {
-    return NanThrowTypeError(
+  if (!info[0]->IsString()) {
+    return Nan::ThrowTypeError(
         "addHttp2Port's first argument must be a String");
   }
-  if (!ServerCredentials::HasInstance(args[1])) {
-    return NanThrowTypeError(
+  if (!ServerCredentials::HasInstance(info[1])) {
+    return Nan::ThrowTypeError(
         "addHttp2Port's second argument must be ServerCredentials");
   }
-  Server *server = ObjectWrap::Unwrap<Server>(args.This());
+  Server *server = ObjectWrap::Unwrap<Server>(info.This());
   ServerCredentials *creds_object = ObjectWrap::Unwrap<ServerCredentials>(
-      args[1]->ToObject());
+      Nan::To<Object>(info[1]).ToLocalChecked());
   grpc_server_credentials *creds = creds_object->GetWrappedServerCredentials();
   int port;
   if (creds == NULL) {
     port = grpc_server_add_insecure_http2_port(server->wrapped_server,
-                                               *NanUtf8String(args[0]));
+                                               *Utf8String(info[0]));
   } else {
     port = grpc_server_add_secure_http2_port(server->wrapped_server,
-                                             *NanUtf8String(args[0]),
+                                             *Utf8String(info[0]),
                                              creds);
   }
-  NanReturnValue(NanNew<Number>(port));
+  info.GetReturnValue().Set(Nan::New<Number>(port));
 }
 
 NAN_METHOD(Server::Start) {
-  NanScope();
-  if (!HasInstance(args.This())) {
-    return NanThrowTypeError("start can only be called on a Server");
+  Nan::HandleScope scope;
+  if (!HasInstance(info.This())) {
+    return Nan::ThrowTypeError("start can only be called on a Server");
   }
-  Server *server = ObjectWrap::Unwrap<Server>(args.This());
+  Server *server = ObjectWrap::Unwrap<Server>(info.This());
   grpc_server_start(server->wrapped_server);
-  NanReturnUndefined();
 }
 
 NAN_METHOD(Server::TryShutdown) {
-  NanScope();
-  if (!HasInstance(args.This())) {
-    return NanThrowTypeError("tryShutdown can only be called on a Server");
+  Nan::HandleScope scope;
+  if (!HasInstance(info.This())) {
+    return Nan::ThrowTypeError("tryShutdown can only be called on a Server");
   }
-  Server *server = ObjectWrap::Unwrap<Server>(args.This());
+  Server *server = ObjectWrap::Unwrap<Server>(info.This());
   unique_ptr<OpVec> ops(new OpVec());
   grpc_server_shutdown_and_notify(
       server->wrapped_server,
       CompletionQueueAsyncWorker::GetQueue(),
-      new struct tag(new NanCallback(args[0].As<Function>()), ops.release(),
+      new struct tag(new Nan::Callback(info[0].As<Function>()), ops.release(),
                      shared_ptr<Resources>(nullptr)));
   CompletionQueueAsyncWorker::Next();
-  NanReturnUndefined();
 }
 
 NAN_METHOD(Server::ForceShutdown) {
-  NanScope();
-  if (!HasInstance(args.This())) {
-    return NanThrowTypeError("forceShutdown can only be called on a Server");
+  Nan::HandleScope scope;
+  if (!HasInstance(info.This())) {
+    return Nan::ThrowTypeError("forceShutdown can only be called on a Server");
   }
-  Server *server = ObjectWrap::Unwrap<Server>(args.This());
+  Server *server = ObjectWrap::Unwrap<Server>(info.This());
   server->ShutdownServer();
-  NanReturnUndefined();
 }
 
 }  // namespace node

src/node/ext/server.h

@@ -44,14 +44,14 @@ namespace node {
 /* Wraps grpc_server as a JavaScript object. Provides a constructor
    and wrapper methods for grpc_server_create, grpc_server_request_call,
    grpc_server_add_http2_port, and grpc_server_start. */
-class Server : public ::node::ObjectWrap {
+class Server : public Nan::ObjectWrap {
  public:
   /* Initializes the Server class and exposes the constructor and
      wrapper methods to JavaScript */
-  static void Init(v8::Handle<v8::Object> exports);
+  static void Init(v8::Local<v8::Object> exports);
   /* Tests whether the given value was constructed by this class's
      JavaScript constructor */
-  static bool HasInstance(v8::Handle<v8::Value> val);
+  static bool HasInstance(v8::Local<v8::Value> val);
 
  private:
   explicit Server(grpc_server *server);
@@ -69,8 +69,8 @@ class Server : public ::node::ObjectWrap {
   static NAN_METHOD(Start);
   static NAN_METHOD(TryShutdown);
   static NAN_METHOD(ForceShutdown);
-  static NanCallback *constructor;
-  static v8::Persistent<v8::FunctionTemplate> fun_tpl;
+  static Nan::Callback *constructor;
+  static Nan::Persistent<v8::FunctionTemplate> fun_tpl;
 
   grpc_server *wrapped_server;
   grpc_completion_queue *shutdown_queue;

src/node/ext/server_credentials.cc

@@ -41,22 +41,28 @@
 namespace grpc {
 namespace node {
 
+using Nan::Callback;
+using Nan::EscapableHandleScope;
+using Nan::HandleScope;
+using Nan::Maybe;
+using Nan::MaybeLocal;
+using Nan::ObjectWrap;
+using Nan::Persistent;
+using Nan::Utf8String;
+
 using v8::Array;
 using v8::Exception;
 using v8::External;
 using v8::Function;
 using v8::FunctionTemplate;
-using v8::Handle;
-using v8::HandleScope;
 using v8::Integer;
 using v8::Local;
 using v8::Object;
 using v8::ObjectTemplate;
-using v8::Persistent;
 using v8::String;
 using v8::Value;
 
-NanCallback *ServerCredentials::constructor;
+Nan::Callback *ServerCredentials::constructor;
 Persistent<FunctionTemplate> ServerCredentials::fun_tpl;
 
 ServerCredentials::ServerCredentials(grpc_server_credentials *credentials)
@@ -66,33 +72,41 @@ ServerCredentials::~ServerCredentials() {
   grpc_server_credentials_release(wrapped_credentials);
 }
 
-void ServerCredentials::Init(Handle<Object> exports) {
-  NanScope();
-  Local<FunctionTemplate> tpl = NanNew<FunctionTemplate>(New);
-  tpl->SetClassName(NanNew("ServerCredentials"));
+void ServerCredentials::Init(Local<Object> exports) {
+  Nan::HandleScope scope;
+  Local<FunctionTemplate> tpl = Nan::New<FunctionTemplate>(New);
+  tpl->SetClassName(Nan::New("ServerCredentials").ToLocalChecked());
   tpl->InstanceTemplate()->SetInternalFieldCount(1);
-  NanAssignPersistent(fun_tpl, tpl);
-  Handle<Function> ctr = tpl->GetFunction();
-  ctr->Set(NanNew("createSsl"),
-           NanNew<FunctionTemplate>(CreateSsl)->GetFunction());
-  ctr->Set(NanNew("createInsecure"),
-           NanNew<FunctionTemplate>(CreateInsecure)->GetFunction());
-  constructor = new NanCallback(ctr);
-  exports->Set(NanNew("ServerCredentials"), ctr);
+  Local<Function> ctr = tpl->GetFunction();
+  Nan::Set(ctr, Nan::New("createSsl").ToLocalChecked(),
+           Nan::GetFunction(
+               Nan::New<FunctionTemplate>(CreateSsl)).ToLocalChecked());
+  Nan::Set(ctr, Nan::New("createInsecure").ToLocalChecked(),
+           Nan::GetFunction(
+               Nan::New<FunctionTemplate>(CreateInsecure)).ToLocalChecked());
+  fun_tpl.Reset(tpl);
+  constructor = new Nan::Callback(ctr);
+  Nan::Set(exports, Nan::New("ServerCredentials").ToLocalChecked(), ctr);
 }
 
-bool ServerCredentials::HasInstance(Handle<Value> val) {
-  NanScope();
-  return NanHasInstance(fun_tpl, val);
+bool ServerCredentials::HasInstance(Local<Value> val) {
+  Nan::HandleScope scope;
+  return Nan::New(fun_tpl)->HasInstance(val);
 }
 
-Handle<Value> ServerCredentials::WrapStruct(
+Local<Value> ServerCredentials::WrapStruct(
     grpc_server_credentials *credentials) {
-  NanEscapableScope();
+  Nan::EscapableHandleScope scope;
   const int argc = 1;
-  Handle<Value> argv[argc] = {
-    NanNew<External>(reinterpret_cast<void *>(credentials))};
-  return NanEscapeScope(constructor->GetFunction()->NewInstance(argc, argv));
+  Local<Value> argv[argc] = {
+    Nan::New<External>(reinterpret_cast<void *>(credentials))};
+  MaybeLocal<Object> maybe_instance = Nan::NewInstance(
+      constructor->GetFunction(), argc, argv);
+  if (maybe_instance.IsEmpty()) {
+    return scope.Escape(Nan::Null());
+  } else {
+    return scope.Escape(maybe_instance.ToLocalChecked());
+  }
 }
 
 grpc_server_credentials *ServerCredentials::GetWrappedServerCredentials() {
@@ -100,96 +114,103 @@ grpc_server_credentials *ServerCredentials::GetWrappedServerCredentials() {
 }
 
 NAN_METHOD(ServerCredentials::New) {
-  NanScope();
-
-  if (args.IsConstructCall()) {
-    if (!args[0]->IsExternal()) {
-      return NanThrowTypeError(
+  if (info.IsConstructCall()) {
+    if (!info[0]->IsExternal()) {
+      return Nan::ThrowTypeError(
           "ServerCredentials can only be created with the provide functions");
     }
-    Handle<External> ext = args[0].As<External>();
+    Local<External> ext = info[0].As<External>();
     grpc_server_credentials *creds_value =
         reinterpret_cast<grpc_server_credentials *>(ext->Value());
     ServerCredentials *credentials = new ServerCredentials(creds_value);
-    credentials->Wrap(args.This());
-    NanReturnValue(args.This());
+    credentials->Wrap(info.This());
+    info.GetReturnValue().Set(info.This());
   } else {
     const int argc = 1;
-    Local<Value> argv[argc] = {args[0]};
-    NanReturnValue(constructor->GetFunction()->NewInstance(argc, argv));
+    Local<Value> argv[argc] = {info[0]};
+    MaybeLocal<Object> maybe_instance = constructor->GetFunction()->NewInstance(
+        argc, argv);
+    if (maybe_instance.IsEmpty()) {
+      // There's probably a pending exception
+      return;
+    } else {
+      info.GetReturnValue().Set(maybe_instance.ToLocalChecked());
+    }
   }
 }
 
 NAN_METHOD(ServerCredentials::CreateSsl) {
-  // TODO: have the node API support multiple key/cert pairs.
-  NanScope();
+  Nan::HandleScope scope;
   char *root_certs = NULL;
-  if (::node::Buffer::HasInstance(args[0])) {
-    root_certs = ::node::Buffer::Data(args[0]);
-  } else if (!(args[0]->IsNull() || args[0]->IsUndefined())) {
-    return NanThrowTypeError(
+  if (::node::Buffer::HasInstance(info[0])) {
+    root_certs = ::node::Buffer::Data(info[0]);
+  } else if (!(info[0]->IsNull() || info[0]->IsUndefined())) {
+    return Nan::ThrowTypeError(
         "createSSl's first argument must be a Buffer if provided");
   }
-  if (!args[1]->IsArray()) {
-    return NanThrowTypeError(
+  if (!info[1]->IsArray()) {
+    return Nan::ThrowTypeError(
         "createSsl's second argument must be a list of objects");
   }
   int force_client_auth = 0;
-  if (args[2]->IsBoolean()) {
-    force_client_auth = (int)args[2]->BooleanValue();
-  } else if (!(args[2]->IsUndefined() || args[2]->IsNull())) {
-    return NanThrowTypeError(
+  if (info[2]->IsBoolean()) {
+    force_client_auth = (int)Nan::To<bool>(info[2]).FromJust();
+  } else if (!(info[2]->IsUndefined() || info[2]->IsNull())) {
+    return Nan::ThrowTypeError(
         "createSsl's third argument must be a boolean if provided");
   }
-  Handle<Array> pair_list = Local<Array>::Cast(args[1]);
+  Local<Array> pair_list = Local<Array>::Cast(info[1]);
   uint32_t key_cert_pair_count = pair_list->Length();
   grpc_ssl_pem_key_cert_pair *key_cert_pairs = new grpc_ssl_pem_key_cert_pair[
       key_cert_pair_count];
 
-  Handle<String> key_key = NanNew("private_key");
-  Handle<String> cert_key = NanNew("cert_chain");
+  Local<String> key_key = Nan::New("private_key").ToLocalChecked();
+  Local<String> cert_key = Nan::New("cert_chain").ToLocalChecked();
 
   for(uint32_t i = 0; i < key_cert_pair_count; i++) {
-    if (!pair_list->Get(i)->IsObject()) {
+    Local<Value> pair_val = Nan::Get(pair_list, i).ToLocalChecked();
+    if (!pair_val->IsObject()) {
       delete key_cert_pairs;
-      return NanThrowTypeError("Key/cert pairs must be objects");
+      return Nan::ThrowTypeError("Key/cert pairs must be objects");
     }
-    Handle<Object> pair_obj = pair_list->Get(i)->ToObject();
-    if (!pair_obj->HasOwnProperty(key_key)) {
+    Local<Object> pair_obj = Nan::To<Object>(pair_val).ToLocalChecked();
+    MaybeLocal<Value> maybe_key = Nan::Get(pair_obj, key_key);
+    if (maybe_key.IsEmpty()) {
       delete key_cert_pairs;
-      return NanThrowTypeError(
+      return Nan::ThrowTypeError(
           "Key/cert pairs must have a private_key and a cert_chain");
     }
-    if (!pair_obj->HasOwnProperty(cert_key)) {
+    MaybeLocal<Value> maybe_cert = Nan::Get(pair_obj, cert_key);
+    if (maybe_cert.IsEmpty()) {
       delete key_cert_pairs;
-      return NanThrowTypeError(
+      return Nan::ThrowTypeError(
           "Key/cert pairs must have a private_key and a cert_chain");
     }
-    if (!::node::Buffer::HasInstance(pair_obj->Get(key_key))) {
+    if (!::node::Buffer::HasInstance(maybe_key.ToLocalChecked())) {
       delete key_cert_pairs;
-      return NanThrowTypeError("private_key must be a Buffer");
+      return Nan::ThrowTypeError("private_key must be a Buffer");
     }
-    if (!::node::Buffer::HasInstance(pair_obj->Get(cert_key))) {
+    if (!::node::Buffer::HasInstance(maybe_cert.ToLocalChecked())) {
       delete key_cert_pairs;
-      return NanThrowTypeError("cert_chain must be a Buffer");
+      return Nan::ThrowTypeError("cert_chain must be a Buffer");
     }
     key_cert_pairs[i].private_key = ::node::Buffer::Data(
-        pair_obj->Get(key_key));
+        maybe_key.ToLocalChecked());
     key_cert_pairs[i].cert_chain = ::node::Buffer::Data(
-        pair_obj->Get(cert_key));
+        maybe_cert.ToLocalChecked());
   }
   grpc_server_credentials *creds = grpc_ssl_server_credentials_create(
       root_certs, key_cert_pairs, key_cert_pair_count, force_client_auth, NULL);
   delete key_cert_pairs;
   if (creds == NULL) {
-    NanReturnNull();
+    info.GetReturnValue().SetNull();
+  } else {
+    info.GetReturnValue().Set(WrapStruct(creds));
   }
-  NanReturnValue(WrapStruct(creds));
 }
 
 NAN_METHOD(ServerCredentials::CreateInsecure) {
-  NanScope();
-  NanReturnValue(WrapStruct(NULL));
+  info.GetReturnValue().Set(WrapStruct(NULL));
 }
 
 }  // namespace node

src/node/ext/server_credentials.h

@@ -43,12 +43,12 @@ namespace grpc {
 namespace node {
 
 /* Wrapper class for grpc_server_credentials structs */
-class ServerCredentials : public ::node::ObjectWrap {
+class ServerCredentials : public Nan::ObjectWrap {
  public:
-  static void Init(v8::Handle<v8::Object> exports);
-  static bool HasInstance(v8::Handle<v8::Value> val);
+  static void Init(v8::Local<v8::Object> exports);
+  static bool HasInstance(v8::Local<v8::Value> val);
   /* Wrap a grpc_server_credentials struct in a javascript object */
-  static v8::Handle<v8::Value> WrapStruct(grpc_server_credentials *credentials);
+  static v8::Local<v8::Value> WrapStruct(grpc_server_credentials *credentials);
 
   /* Returns the grpc_server_credentials struct that this object wraps */
   grpc_server_credentials *GetWrappedServerCredentials();
@@ -64,9 +64,9 @@ class ServerCredentials : public ::node::ObjectWrap {
   static NAN_METHOD(New);
   static NAN_METHOD(CreateSsl);
   static NAN_METHOD(CreateInsecure);
-  static NanCallback *constructor;
+  static Nan::Callback *constructor;
   // Used for typechecking instances of this javascript class
-  static v8::Persistent<v8::FunctionTemplate> fun_tpl;
+  static Nan::Persistent<v8::FunctionTemplate> fun_tpl;
 
   grpc_server_credentials *wrapped_credentials;
 };

src/node/package.json

@@ -27,7 +27,7 @@
   "dependencies": {
     "bindings": "^1.2.0",
     "lodash": "^3.9.3",
-    "nan": "^1.5.0",
+    "nan": "^2.0.0",
     "protobufjs": "^4.0.0"
   },
   "devDependencies": {