Merge pull request #118 from unistack-org/cleanup

update to latest micro
2022-06-27 00:42:27 +03:00 · 2022-06-27 00:39:51 +03:00 · 2022-06-25 23:32:07 +03:00 · 2022-05-11 11:28:34 +03:00 · 2022-05-03 10:20:24 +03:00 · 2022-05-03 07:17:50 +00:00
34 changed files with 1143 additions and 1970 deletions
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -0,0 +1,19 @@
+# To get started with Dependabot version updates, you'll need to specify which
+# package ecosystems to update and where the package manifests are located.
+# Please see the documentation for all configuration options:
+# https://help.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
+
+version: 2
+updates:
+
+  # Maintain dependencies for GitHub Actions
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "daily"
+
+  # Maintain dependencies for Golang
+  - package-ecosystem: "gomod"
+    directory: "/"
+    schedule:
+      interval: "daily"
--- a/.github/stale.sh
+++ b/.github/stale.sh
@@ -1,13 +0,0 @@
-#!/bin/bash -ex
-
-export PATH=$PATH:$(pwd)/bin
-export GO111MODULE=on
-export GOBIN=$(pwd)/bin
-
-#go get github.com/rvflash/goup@v0.4.1
-
-#goup -v ./...
-#go get github.com/psampaz/go-mod-outdated@v0.6.0
-go list -u -m -mod=mod -json all | go-mod-outdated -update -direct -ci || true
-
-#go list -u -m -json all | go-mod-outdated -update
--- a/.github/workflows/autoapprove.yml
+++ b/.github/workflows/autoapprove.yml
@@ -0,0 +1,20 @@
+name: "autoapprove"
+
+on:
+  pull_request_target:
+    types: [assigned, opened, synchronize, reopened]
+
+permissions:
+  pull-requests: write
+  contents: write
+
+jobs:
+  autoapprove:
+    runs-on: ubuntu-latest
+    steps:
+      - name: approve
+        uses: hmarr/auto-approve-action@v2
+        if: github.actor == 'vtolstov' || github.actor == 'dependabot[bot]'
+        id: approve
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
--- a/.github/workflows/automerge.yml
+++ b/.github/workflows/automerge.yml
@@ -0,0 +1,21 @@
+name: "automerge"
+
+on:
+  pull_request_target:
+    types: [assigned, opened, synchronize, reopened]
+
+permissions:
+  pull-requests: write
+  contents: write
+
+jobs:
+  automerge:
+    runs-on: ubuntu-latest
+    if: github.actor == 'vtolstov'
+    steps:
+      - name: merge
+        id: merge
+        run: gh pr merge --auto --merge "$PR_URL"
+        env:
+          PR_URL: ${{github.event.pull_request.html_url}}
+          GITHUB_TOKEN: ${{secrets.TOKEN}}
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -3,19 +3,20 @@ on:
 push:
    branches:
    - master
+    - v3
 jobs:
  test:
    name: test
    runs-on: ubuntu-latest
    steps:
    - name: setup
-      uses: actions/setup-go@v1
+      uses: actions/setup-go@v3
      with:
-        go-version: 1.15
+        go-version: 1.17
    - name: checkout
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
    - name: cache
-      uses: actions/cache@v2
+      uses: actions/cache@v3
      with:
        path: ~/go/pkg/mod
        key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
@@ -31,9 +32,9 @@ jobs:
    runs-on: ubuntu-latest
    steps:
      - name: checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
      - name: lint
-        uses: golangci/golangci-lint-action@v1
+        uses: golangci/golangci-lint-action@v3.2.0
        continue-on-error: true
        with:
          # Required: the version of golangci-lint is required and must be specified without patch version: we always use the latest patch version.
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -0,0 +1,78 @@
+# For most projects, this workflow file will not need changing; you simply need
+# to commit it to your repository.
+#
+# You may wish to alter this file to override the set of languages analyzed,
+# or to provide custom queries or build logic.
+#
+# ******** NOTE ********
+# We have attempted to detect the languages in your repository. Please check
+# the `language` matrix defined below to confirm you have the correct set of
+# supported CodeQL languages.
+#
+name: "codeql"
+
+on:
+  workflow_run:
+    workflows: ["prbuild"]
+    types:
+      - completed
+  push:
+    branches: [ master, v3 ]
+  pull_request:
+    # The branches below must be a subset of the branches above
+    branches: [ master, v3 ]
+  schedule:
+    - cron: '34 1 * * 0'
+
+jobs:
+  analyze:
+    name: analyze
+    runs-on: ubuntu-latest
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language: [ 'go' ]
+        # CodeQL supports [ 'cpp', 'csharp', 'go', 'java', 'javascript', 'python' ]
+        # Learn more:
+        # https://docs.github.com/en/free-pro-team@latest/github/finding-security-vulnerabilities-and-errors-in-your-code/configuring-code-scanning#changing-the-languages-that-are-analyzed
+
+    steps:
+    - name: checkout
+      uses: actions/checkout@v3
+    - name: setup
+      uses: actions/setup-go@v3
+      with:
+        go-version: 1.17
+    # Initializes the CodeQL tools for scanning.
+    - name: init
+      uses: github/codeql-action/init@v2
+      with:
+        languages: ${{ matrix.language }}
+        # If you wish to specify custom queries, you can do so here or in a config file.
+        # By default, queries listed here will override any specified in a config file.
+        # Prefix the list here with "+" to use these queries and those in the config file.
+        # queries: ./path/to/local/query, your-org/your-repo/queries@main
+
+    # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
+    # If this step fails, then you should remove it and run the build manually (see below)
+    - name: autobuild
+      uses: github/codeql-action/autobuild@v2
+
+    # ℹ️ Command-line programs to run using the OS shell.
+    # 📚 https://git.io/JvXDl
+
+    # ✏️ If the Autobuild fails above, remove it and uncomment the following three lines
+    #    and modify them (or add more) to build your code if your project
+    #    uses a compiled language
+
+    #- run: |
+    #   make bootstrap
+    #   make release
+
+    - name: analyze
+      uses: github/codeql-action/analyze@v2
--- a/.github/workflows/dependabot-automerge.yml
+++ b/.github/workflows/dependabot-automerge.yml
@@ -0,0 +1,27 @@
+name: "dependabot-automerge"
+
+on:
+  pull_request_target:
+    types: [assigned, opened, synchronize, reopened]
+
+permissions:
+  pull-requests: write
+  contents: write
+
+jobs:
+  automerge:
+    runs-on: ubuntu-latest
+    if: github.actor == 'dependabot[bot]'
+    steps:
+      - name: metadata
+        id: metadata
+        uses: dependabot/fetch-metadata@v1.3.1
+        with:
+          github-token: "${{ secrets.TOKEN }}"
+      - name: merge
+        id: merge
+        if: ${{contains(steps.metadata.outputs.dependency-names, 'go.unistack.org')}}
+        run: gh pr merge --auto --merge "$PR_URL"
+        env:
+          PR_URL: ${{github.event.pull_request.html_url}}
+          GITHUB_TOKEN: ${{secrets.TOKEN}}
--- a/.github/workflows/pr.yml
+++ b/.github/workflows/pr.yml
@@ -3,19 +3,20 @@ on:
  pull_request:
    branches:
    - master
+    - v3
 jobs:
  test:
    name: test
    runs-on: ubuntu-latest
    steps:
    - name: setup
-      uses: actions/setup-go@v1
+      uses: actions/setup-go@v3
      with:
-        go-version: 1.15
+        go-version: 1.17
    - name: checkout
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
    - name: cache
-      uses: actions/cache@v2
+      uses: actions/cache@v3
      with:
        path: ~/go/pkg/mod
        key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
@@ -31,9 +32,9 @@ jobs:
    runs-on: ubuntu-latest
    steps:
      - name: checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
      - name: lint
-        uses: golangci/golangci-lint-action@v1
+        uses: golangci/golangci-lint-action@v3.2.0
        continue-on-error: true
        with:
          # Required: the version of golangci-lint is required and must be specified without patch version: we always use the latest patch version.
--- a/.golangci.yml
+++ b/.golangci.yml
@@ -0,0 +1,44 @@
+run:
+  concurrency: 4
+  deadline: 5m
+  issues-exit-code: 1
+  tests: true
+
+linters-settings:
+  govet:
+    check-shadowing: true
+    enable:
+      - fieldalignment
+
+linters:
+  enable:
+    - govet
+    - deadcode
+    - errcheck
+    - govet
+    - ineffassign
+    - staticcheck
+    - structcheck
+    - typecheck
+    - unused
+    - varcheck
+    - bodyclose
+    - gci
+    - goconst
+    - gocritic
+    - gosimple
+    - gofmt
+    - gofumpt
+    - goimports
+    - golint
+    - gosec
+    - makezero
+    - misspell
+    - nakedret
+    - nestif
+    - nilerr
+    - noctx
+    - prealloc
+    - unconvert
+    - unparam
+  disable-all: false
--- a/192
+++ b/192
@@ -0,0 +1,192 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
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+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
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+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
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+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
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+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
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+      to the Licensor or its representatives, including but not limited to
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+      and issue tracking systems that are managed by, or on behalf of, the
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+      designated in writing by the copyright owner as "Not a Contribution."
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+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
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+      copyright license to reproduce, prepare Derivative Works of,
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+      (except as stated in this section) patent license to make, have made,
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+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
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+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
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+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
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+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
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+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   Copyright 2015-2020 Asim Aslam.
+   Copyright 2019-2020 Unistack LLC.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
--- a/README.md
+++ b/README.md
@@ -1,30 +0,0 @@
-# GRPC Server
-
-The grpc server is a [micro.Server](https://godoc.org/github.com/micro/go-micro/server#Server) compatible server.
-
-## Overview
-
-The server makes use of the [google.golang.org/grpc](google.golang.org/grpc) framework for the underlying server
-but continues to use micro handler signatures and protoc-gen-micro generated code.
-
-## Usage
-
-Specify the server to your micro service
-
-```go
-import (
-        "github.com/micro/go-micro"
-        "github.com/micro/go-plugins/server/grpc"
-)
-
-func main() {
-        service := micro.NewService(
-                // This needs to be first as it replaces the underlying server
-                // which causes any configuration set before it
-                // to be discarded
-                micro.Server(grpc.NewServer()),
-                micro.Name("greeter"),
-        )
-}
-```
-**NOTE**: Setting the gRPC server and/or client causes the underlying the server/client to be replaced which causes any previous configuration set on that server/client to be discarded. It is therefore recommended to set gRPC server/client before any other configuration
--- a/codec.go
+++ b/codec.go
@@ -1,233 +1,77 @@
 package grpc

 import (
-	b "bytes"
-	"encoding/json"
-	"strings"
+	"io"

-	oldjsonpb "github.com/golang/protobuf/jsonpb"
-	oldproto "github.com/golang/protobuf/proto"
-	bytes "github.com/unistack-org/micro-codec-bytes"
-	"github.com/unistack-org/micro/v3/codec"
-	"google.golang.org/grpc"
+	"go.unistack.org/micro/v3/codec"
 	"google.golang.org/grpc/encoding"
-	"google.golang.org/grpc/metadata"
-	jsonpb "google.golang.org/protobuf/encoding/protojson"
-	"google.golang.org/protobuf/proto"
-)
-
-type jsonCodec struct{}
-type bytesCodec struct{}
-type protoCodec struct{}
-type wrapCodec struct{ encoding.Codec }
-
-var (
-	jsonpbMarshaler = jsonpb.MarshalOptions{
-		UseEnumNumbers:  false,
-		EmitUnpopulated: false,
-		UseProtoNames:   true,
-		AllowPartial:    false,
-	}
-
-	jsonpbUnmarshaler = jsonpb.UnmarshalOptions{
-		DiscardUnknown: false,
-		AllowPartial:   false,
-	}
-
-	oldjsonpbMarshaler = oldjsonpb.Marshaler{
-		OrigName:     true,
-		EmitDefaults: false,
-	}
-
-	oldjsonpbUnmarshaler = oldjsonpb.Unmarshaler{
-		AllowUnknownFields: false,
-	}
 )

 var (
-	defaultGRPCCodecs = map[string]encoding.Codec{
-		"application/json":         jsonCodec{},
-		"application/proto":        protoCodec{},
-		"application/protobuf":     protoCodec{},
-		"application/octet-stream": protoCodec{},
-		"application/grpc":         protoCodec{},
-		"application/grpc+json":    jsonCodec{},
-		"application/grpc+proto":   protoCodec{},
-		"application/grpc+bytes":   bytesCodec{},
-	}
+	_ codec.Codec    = &wrapGrpcCodec{}
+	_ encoding.Codec = &wrapMicroCodec{}
 )

-func (w wrapCodec) String() string {
+type wrapMicroCodec struct{ codec.Codec }
+
+func (w *wrapMicroCodec) Name() string {
+	return w.Codec.String()
+}
+
+func (w *wrapMicroCodec) Marshal(v interface{}) ([]byte, error) {
+	return w.Codec.Marshal(v)
+}
+
+func (w *wrapMicroCodec) Unmarshal(d []byte, v interface{}) error {
+	return w.Codec.Unmarshal(d, v)
+}
+
+type wrapGrpcCodec struct{ encoding.Codec }
+
+func (w *wrapGrpcCodec) String() string {
 	return w.Codec.Name()
 }

-func (w wrapCodec) Marshal(v interface{}) ([]byte, error) {
-	switch m := v.(type) {
-	case *bytes.Frame:
+func (w *wrapGrpcCodec) Marshal(v interface{}, opts ...codec.Option) ([]byte, error) {
+	if m, ok := v.(*codec.Frame); ok {
 		return m.Data, nil
 	}
 	return w.Codec.Marshal(v)
 }

-func (w wrapCodec) Unmarshal(data []byte, v interface{}) error {
-	if len(data) == 0 {
+func (w *wrapGrpcCodec) Unmarshal(d []byte, v interface{}, opts ...codec.Option) error {
+	if d == nil || v == nil {
 		return nil
 	}
-	if v == nil {
+	if m, ok := v.(*codec.Frame); ok {
+		m.Data = d
 		return nil
 	}
-	switch m := v.(type) {
-	case *bytes.Frame:
-		m.Data = data
-		return nil
-	}
-	return w.Codec.Unmarshal(data, v)
+	return w.Codec.Unmarshal(d, v)
 }

-func (protoCodec) Marshal(v interface{}) ([]byte, error) {
-	switch m := v.(type) {
-	case proto.Message:
-		return proto.Marshal(m)
-	case oldproto.Message:
-		return oldproto.Marshal(m)
-	}
-	return nil, codec.ErrInvalidMessage
-}
-
-func (protoCodec) Unmarshal(data []byte, v interface{}) error {
-	if len(data) == 0 {
-		return nil
-	}
-	if v == nil {
-		return nil
-	}
-	switch m := v.(type) {
-	case proto.Message:
-		return proto.Unmarshal(data, m)
-	case oldproto.Message:
-		return oldproto.Unmarshal(data, m)
-	}
-	return codec.ErrInvalidMessage
-}
-
-func (protoCodec) Name() string {
-	return "proto"
-}
-
-func (jsonCodec) Marshal(v interface{}) ([]byte, error) {
-	switch m := v.(type) {
-	case proto.Message:
-		return jsonpbMarshaler.Marshal(m)
-	case oldproto.Message:
-		buf := b.NewBuffer(nil)
-		err := oldjsonpbMarshaler.Marshal(buf, m)
-		return buf.Bytes(), err
-	}
-	return json.Marshal(v)
-}
-
-func (jsonCodec) Unmarshal(data []byte, v interface{}) error {
-	if len(data) == 0 {
-		return nil
-	}
-	if v == nil {
-		return nil
-	}
-	switch m := v.(type) {
-	case proto.Message:
-		return jsonpbUnmarshaler.Unmarshal(data, m)
-	case oldproto.Message:
-		return oldjsonpbUnmarshaler.Unmarshal(b.NewReader(data), m)
-	}
-	return json.Unmarshal(data, v)
-}
-
-func (jsonCodec) Name() string {
-	return "json"
-}
-
-func (bytesCodec) Marshal(v interface{}) ([]byte, error) {
-	switch m := v.(type) {
-	case *[]byte:
-		return *m, nil
-	}
-	return nil, codec.ErrInvalidMessage
-}
-
-func (bytesCodec) Unmarshal(data []byte, v interface{}) error {
-	if len(data) == 0 {
-		return nil
-	}
-	if v == nil {
-		return nil
-	}
-	switch m := v.(type) {
-	case *[]byte:
-		*m = data
-		return nil
-	}
-	return codec.ErrInvalidMessage
-}
-
-func (bytesCodec) Name() string {
-	return "bytes"
-}
-
-type grpcCodec struct {
-	grpc.ServerStream
-	// headers
-	id       string
-	target   string
-	method   string
-	endpoint string
-
-	c encoding.Codec
-}
-
-func (g *grpcCodec) ReadHeader(m *codec.Message, mt codec.MessageType) error {
-	md, _ := metadata.FromIncomingContext(g.ServerStream.Context())
-	if m == nil {
-		m = new(codec.Message)
-	}
-	if m.Header == nil {
-		m.Header = make(map[string]string, len(md))
-	}
-	for k, v := range md {
-		m.Header[k] = strings.Join(v, ",")
-	}
-	m.Id = g.id
-	m.Target = g.target
-	m.Method = g.method
-	m.Endpoint = g.endpoint
+func (w *wrapGrpcCodec) ReadHeader(conn io.Reader, m *codec.Message, mt codec.MessageType) error {
 	return nil
 }

-func (g *grpcCodec) ReadBody(v interface{}) error {
-	// caller has requested a frame
-	switch m := v.(type) {
-	case *bytes.Frame:
-		return g.ServerStream.RecvMsg(m)
+func (w *wrapGrpcCodec) ReadBody(conn io.Reader, v interface{}) error {
+	if m, ok := v.(*codec.Frame); ok {
+		_, err := conn.Read(m.Data)
+		return err
 	}
-	return g.ServerStream.RecvMsg(v)
+	return codec.ErrInvalidMessage
 }

-func (g *grpcCodec) Write(m *codec.Message, v interface{}) error {
+func (w *wrapGrpcCodec) Write(conn io.Writer, m *codec.Message, v interface{}) error {
 	// if we don't have a body
 	if v != nil {
-		b, err := g.c.Marshal(v)
+		b, err := w.Marshal(v)
 		if err != nil {
 			return err
 		}
 		m.Body = b
 	}
 	// write the body using the framing codec
-	return g.ServerStream.SendMsg(&bytes.Frame{Data: m.Body})
-}
-
-func (g *grpcCodec) Close() error {
-	return nil
-}
-
-func (g *grpcCodec) String() string {
-	return "grpc"
+	_, err := conn.Write(m.Body)
+	return err
 }
--- a/context.go
+++ b/context.go
@@ -1,16 +0,0 @@
-package grpc
-
-import (
-	"context"
-
-	"github.com/unistack-org/micro/v3/server"
-)
-
-func setServerOption(k, v interface{}) server.Option {
-	return func(o *server.Options) {
-		if o.Context == nil {
-			o.Context = context.Background()
-		}
-		o.Context = context.WithValue(o.Context, k, v)
-	}
-}
--- a/error.go
+++ b/error.go
@@ -6,26 +6,23 @@ import (
 	"net/http"
 	"os"

-	pb "github.com/unistack-org/micro-server-grpc/internal/errors"
-	"github.com/unistack-org/micro/v3/errors"
+	"go.unistack.org/micro/v3/errors"
 	"google.golang.org/grpc/codes"
 )

-var (
-	errMapping = map[int32]codes.Code{
-		http.StatusOK:                  codes.OK,
-		http.StatusBadRequest:          codes.InvalidArgument,
-		http.StatusRequestTimeout:      codes.DeadlineExceeded,
-		http.StatusNotFound:            codes.NotFound,
-		http.StatusConflict:            codes.AlreadyExists,
-		http.StatusForbidden:           codes.PermissionDenied,
-		http.StatusUnauthorized:        codes.Unauthenticated,
-		http.StatusPreconditionFailed:  codes.FailedPrecondition,
-		http.StatusNotImplemented:      codes.Unimplemented,
-		http.StatusInternalServerError: codes.Internal,
-		http.StatusServiceUnavailable:  codes.Unavailable,
-	}
-)
+var errMapping = map[int32]codes.Code{
+	http.StatusOK:                  codes.OK,
+	http.StatusBadRequest:          codes.InvalidArgument,
+	http.StatusRequestTimeout:      codes.DeadlineExceeded,
+	http.StatusNotFound:            codes.NotFound,
+	http.StatusConflict:            codes.AlreadyExists,
+	http.StatusForbidden:           codes.PermissionDenied,
+	http.StatusUnauthorized:        codes.Unauthenticated,
+	http.StatusPreconditionFailed:  codes.FailedPrecondition,
+	http.StatusNotImplemented:      codes.Unimplemented,
+	http.StatusInternalServerError: codes.Internal,
+	http.StatusServiceUnavailable:  codes.Unavailable,
+}

 // convertCode converts a standard Go error into its canonical code. Note that
 // this is only used to translate the error returned by the server applications.
@@ -61,10 +58,7 @@ func microError(err error) codes.Code {
 	}

 	var ec int32
-	switch verr := err.(type) {
-	case *errors.Error:
-		ec = verr.Code
-	case *pb.Error:
+	if verr, ok := err.(*errors.Error); ok {
 		ec = verr.Code
 	}

@@ -74,16 +68,3 @@ func microError(err error) codes.Code {

 	return codes.Unknown
 }
-
-func pbError(err error) *pb.Error {
-	switch verr := err.(type) {
-	case nil:
-		return nil
-	case *errors.Error:
-		return &pb.Error{Id: verr.Id, Code: verr.Code, Detail: verr.Detail, Status: verr.Status}
-	case *pb.Error:
-		return verr
-	default:
-		return &pb.Error{Code: 500, Detail: err.Error()}
-	}
-}
--- a/errors_test.go
+++ b/errors_test.go
@@ -1,17 +0,0 @@
-package grpc_test
-
-import (
-	"testing"
-
-	pb "github.com/unistack-org/micro-server-grpc/internal/errors"
-	"google.golang.org/protobuf/types/known/anypb"
-)
-
-func TestErrors(t *testing.T) {
-	any, err := anypb.New(&pb.Error{})
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	t.Logf("srv any: %#+v\n", any)
-}
--- a/extractor.go
+++ b/extractor.go
@@ -1,122 +0,0 @@
-package grpc
-
-import (
-	"fmt"
-	"reflect"
-	"strings"
-
-	"github.com/unistack-org/micro/v3/registry"
-)
-
-func extractValue(v reflect.Type, d int) *registry.Value {
-	if d == 3 {
-		return nil
-	}
-	if v == nil {
-		return nil
-	}
-
-	if v.Kind() == reflect.Ptr {
-		v = v.Elem()
-	}
-
-	arg := &registry.Value{
-		Name: v.Name(),
-		Type: v.Name(),
-	}
-
-	switch v.Kind() {
-	case reflect.Struct:
-		for i := 0; i < v.NumField(); i++ {
-			f := v.Field(i)
-			val := extractValue(f.Type, d+1)
-			if val == nil {
-				continue
-			}
-
-			// if we can find a json tag use it
-			if tags := f.Tag.Get("json"); len(tags) > 0 {
-				parts := strings.Split(tags, ",")
-				if parts[0] == "-" || parts[0] == "omitempty" {
-					continue
-				}
-				val.Name = parts[0]
-			}
-
-			// if there's no name default it
-			if len(val.Name) == 0 {
-				val.Name = v.Field(i).Name
-			}
-
-			arg.Values = append(arg.Values, val)
-		}
-	case reflect.Slice:
-		p := v.Elem()
-		if p.Kind() == reflect.Ptr {
-			p = p.Elem()
-		}
-		arg.Type = "[]" + p.Name()
-	}
-
-	return arg
-}
-
-func extractEndpoint(method reflect.Method) *registry.Endpoint {
-	if method.PkgPath != "" {
-		return nil
-	}
-
-	var rspType, reqType reflect.Type
-	var stream bool
-	mt := method.Type
-
-	switch mt.NumIn() {
-	case 3:
-		reqType = mt.In(1)
-		rspType = mt.In(2)
-	case 4:
-		reqType = mt.In(2)
-		rspType = mt.In(3)
-	default:
-		return nil
-	}
-
-	// are we dealing with a stream?
-	switch rspType.Kind() {
-	case reflect.Func, reflect.Interface:
-		stream = true
-	}
-
-	request := extractValue(reqType, 0)
-	response := extractValue(rspType, 0)
-
-	ep := &registry.Endpoint{
-		Name:     method.Name,
-		Request:  request,
-		Response: response,
-		Metadata: make(map[string]string),
-	}
-
-	if stream {
-		ep.Metadata = map[string]string{
-			"stream": fmt.Sprintf("%v", stream),
-		}
-	}
-
-	return ep
-}
-
-func extractSubValue(typ reflect.Type) *registry.Value {
-	var reqType reflect.Type
-	switch typ.NumIn() {
-	case 1:
-		reqType = typ.In(0)
-	case 2:
-		reqType = typ.In(1)
-	case 3:
-		reqType = typ.In(2)
-	default:
-		return nil
-	}
-	return extractValue(reqType, 0)
-}
--- a/extractor_test.go
+++ b/extractor_test.go
@@ -1,65 +0,0 @@
-package grpc
-
-import (
-	"context"
-	"reflect"
-	"testing"
-
-	"github.com/unistack-org/micro/v3/registry"
-)
-
-type testHandler struct{}
-
-type testRequest struct{}
-
-type testResponse struct{}
-
-func (t *testHandler) Test(ctx context.Context, req *testRequest, rsp *testResponse) error {
-	return nil
-}
-
-func TestExtractEndpoint(t *testing.T) {
-	handler := &testHandler{}
-	typ := reflect.TypeOf(handler)
-
-	var endpoints []*registry.Endpoint
-
-	for m := 0; m < typ.NumMethod(); m++ {
-		if e := extractEndpoint(typ.Method(m)); e != nil {
-			endpoints = append(endpoints, e)
-		}
-	}
-
-	if i := len(endpoints); i != 1 {
-		t.Errorf("Expected 1 endpoint, have %d", i)
-	}
-
-	if endpoints[0].Name != "Test" {
-		t.Errorf("Expected handler Test, got %s", endpoints[0].Name)
-	}
-
-	if endpoints[0].Request == nil {
-		t.Error("Expected non nil request")
-	}
-
-	if endpoints[0].Response == nil {
-		t.Error("Expected non nil request")
-	}
-
-	if endpoints[0].Request.Name != "testRequest" {
-		t.Errorf("Expected testRequest got %s", endpoints[0].Request.Name)
-	}
-
-	if endpoints[0].Response.Name != "testResponse" {
-		t.Errorf("Expected testResponse got %s", endpoints[0].Response.Name)
-	}
-
-	if endpoints[0].Request.Type != "testRequest" {
-		t.Errorf("Expected testRequest type got %s", endpoints[0].Request.Type)
-	}
-
-	if endpoints[0].Response.Type != "testResponse" {
-		t.Errorf("Expected testResponse type got %s", endpoints[0].Response.Type)
-	}
-
-}
--- a/generate.go
+++ b/generate.go
@@ -1,3 +0,0 @@
-package grpc
-
-//go:generate protoc -I./internal/errors -I. --go_out=paths=source_relative:./internal/errors internal/errors/server_errors.proto
--- a/go.mod
+++ b/go.mod
@@ -1,16 +1,13 @@
-module github.com/unistack-org/micro-server-grpc
+module go.unistack.org/micro-server-grpc/v3

-go 1.15
+go 1.16

 require (
-	github.com/golang/protobuf v1.4.2
-	github.com/google/go-cmp v0.5.1 // indirect
-	github.com/unistack-org/micro-codec-bytes v0.0.0-20200828083432-4e49e953d844
-	github.com/unistack-org/micro/v3 v3.0.0-gamma.0.20200920124807-9b11ea527aeb
-	golang.org/x/net v0.0.0-20200904194848-62affa334b73
-	golang.org/x/sys v0.0.0-20200803210538-64077c9b5642 // indirect
-	golang.org/x/text v0.3.3 // indirect
-	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect
-	google.golang.org/grpc v1.31.1
-	google.golang.org/protobuf v1.25.0
+	github.com/golang/protobuf v1.5.2
+	go.unistack.org/micro/v3 v3.9.8
+	golang.org/x/net v0.0.0-20220225172249-27dd8689420f
+	golang.org/x/sys v0.0.0-20220310020820-b874c991c1a5 // indirect
+	google.golang.org/genproto v0.0.0-20220310185008-1973136f34c6 // indirect
+	google.golang.org/grpc v1.47.0
+	google.golang.org/protobuf v1.28.0
 )
--- a/go.sum
+++ b/go.sum
@@ -1,104 +1,40 @@
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
 cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
-cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
-cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU=
-cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY=
-cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc=
-cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0=
-cloud.google.com/go v0.50.0/go.mod h1:r9sluTvynVuxRIOHXQEHMFffphuXHOMZMycpNR5e6To=
-cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o=
-cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE=
-cloud.google.com/go/pubsub v1.0.1/go.mod h1:R0Gpsv3s54REJCy4fxDixWD93lHJMoZTyQ2kNxGRt3I=
-cloud.google.com/go/storage v1.0.0/go.mod h1:IhtSnM/ZTZV8YYJWCY8RULGVqBDmpoyjwiyrjsg+URw=
-contrib.go.opencensus.io/exporter/ocagent v0.4.12/go.mod h1:450APlNTSR6FrvC3CTRqYosuDstRB9un7SOx2k/9ckA=
-dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
-github.com/Azure/azure-sdk-for-go v32.4.0+incompatible/go.mod h1:9XXNKU+eRnpl9moKnB4QOLf1HestfXbmab5FXxiDBjc=
-github.com/Azure/go-autorest/autorest v0.1.0/go.mod h1:AKyIcETwSUFxIcs/Wnq/C+kwCtlEYGUVd7FPNb2slmg=
-github.com/Azure/go-autorest/autorest v0.5.0/go.mod h1:9HLKlQjVBH6U3oDfsXOeVc56THsLPw1L03yban4xThw=
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-github.com/Azure/go-autorest/autorest/adal v0.2.0/go.mod h1:MeS4XhScH55IST095THyTxElntu7WqB7pNbZo8Q5G3E=
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-github.com/Azure/go-autorest/autorest/azure/cli v0.1.0/go.mod h1:Dk8CUAt/b/PzkfeRsWzVG9Yj3ps8mS8ECztu43rdU8U=
-github.com/Azure/go-autorest/autorest/date v0.1.0/go.mod h1:plvfp3oPSKwf2DNjlBjWF/7vwR+cUD/ELuzDCXwHUVA=
-github.com/Azure/go-autorest/autorest/mocks v0.1.0/go.mod h1:OTyCOPRA2IgIlWxVYxBee2F5Gr4kF2zd2J5cFRaIDN0=
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-github.com/Azure/go-autorest/autorest/validation v0.1.0/go.mod h1:Ha3z/SqBeaalWQvokg3NZAlQTalVMtOIAs1aGK7G6u8=
-github.com/Azure/go-autorest/logger v0.1.0/go.mod h1:oExouG+K6PryycPJfVSxi/koC6LSNgds39diKLz7Vrc=
-github.com/Azure/go-autorest/tracing v0.1.0/go.mod h1:ROEEAFwXycQw7Sn3DXNtEedEvdeRAgDr0izn4z5Ij88=
-github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
-github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
-github.com/OpenDNS/vegadns2client v0.0.0-20180418235048-a3fa4a771d87/go.mod h1:iGLljf5n9GjT6kc0HBvyI1nOKnGQbNB66VzSNbK5iks=
-github.com/Shopify/sarama v1.19.0/go.mod h1:FVkBWblsNy7DGZRfXLU0O9RCGt5g3g3yEuWXgklEdEo=
-github.com/Shopify/toxiproxy v2.1.4+incompatible/go.mod h1:OXgGpZ6Cli1/URJOF1DMxUHB2q5Ap20/P/eIdh4G0pI=
-github.com/akamai/AkamaiOPEN-edgegrid-golang v0.9.0/go.mod h1:zpDJeKyp9ScW4NNrbdr+Eyxvry3ilGPewKoXw3XGN1k=
-github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
-github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
-github.com/aliyun/alibaba-cloud-sdk-go v0.0.0-20190808125512-07798873deee/go.mod h1:myCDvQSzCW+wB1WAlocEru4wMGJxy+vlxHdhegi1CDQ=
-github.com/aliyun/aliyun-oss-go-sdk v0.0.0-20190307165228-86c17b95fcd5/go.mod h1:T/Aws4fEfogEE9v+HPhhw+CntffsBHJ8nXQCwKr0/g8=
-github.com/apache/thrift v0.12.0/go.mod h1:cp2SuWMxlEZw2r+iP2GNCdIi4C1qmUzdZFSVb+bacwQ=
-github.com/aws/aws-sdk-go v1.23.0/go.mod h1:KmX6BPdI08NWTb3/sm4ZGu5ShLoqVDhKgpiN924inxo=
-github.com/baiyubin/aliyun-sts-go-sdk v0.0.0-20180326062324-cfa1a18b161f/go.mod h1:AuiFmCCPBSrqvVMvuqFuk0qogytodnVFVSN5CeJB8Gc=
-github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
-github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8=
-github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
-github.com/bradfitz/gomemcache v0.0.0-20190913173617-a41fca850d0b/go.mod h1:H0wQNHz2YrLsuXOZozoeDmnHXkNCRmMW0gwFWDfEZDA=
-github.com/caddyserver/certmagic v0.10.6/go.mod h1:Y8jcUBctgk/IhpAzlHKfimZNyXCkfGgRTC0orl8gROQ=
-github.com/cenkalti/backoff/v4 v4.0.0/go.mod h1:eEew/i+1Q6OrCDZh3WiXYv3+nJwBASZ8Bog/87DQnVg=
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-gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
-gopkg.in/yaml.v2 v2.0.0-20170812160011-eb3733d160e7/go.mod h1:JAlM8MvJe8wmxCU4Bli9HhUf9+ttbYbLASfIpnQbh74=
-gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v2 v2.3.0 h1:clyUAQHOM3G0M3f5vQj7LuJrETvjVot3Z5el9nffUtU=
+gopkg.in/yaml.v2 v2.2.3/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-honnef.co/go/tools v0.0.0-20180728063816-88497007e858/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.0-20200615113413-eeeca48fe776/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b h1:h8qDotaEPuJATrMmW04NCwg7v22aHH28wwpauUhK9Oo=
+gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
-honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
-honnef.co/go/tools v0.0.0-20190418001031-e561f6794a2a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
-honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
-rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
--- a/grpc.go
+++ b/grpc.go
--- a/handler.go
+++ b/handler.go
@@ -3,34 +3,28 @@ package grpc
 import (
 	"reflect"

-	"github.com/unistack-org/micro/v3/registry"
-	"github.com/unistack-org/micro/v3/server"
+	"go.unistack.org/micro/v3/register"
+	"go.unistack.org/micro/v3/server"
 )

 type rpcHandler struct {
-	name      string
-	handler   interface{}
-	endpoints []*registry.Endpoint
 	opts      server.HandlerOptions
+	handler   interface{}
+	name      string
+	endpoints []*register.Endpoint
 }

-func newRpcHandler(handler interface{}, opts ...server.HandlerOption) server.Handler {
-	options := server.HandlerOptions{
-		Metadata: make(map[string]map[string]string),
-	}
-
-	for _, o := range opts {
-		o(&options)
-	}
+func newRPCHandler(handler interface{}, opts ...server.HandlerOption) server.Handler {
+	options := server.NewHandlerOptions(opts...)

 	typ := reflect.TypeOf(handler)
 	hdlr := reflect.ValueOf(handler)
 	name := reflect.Indirect(hdlr).Type().Name()

-	var endpoints []*registry.Endpoint
+	var endpoints []*register.Endpoint

 	for m := 0; m < typ.NumMethod(); m++ {
-		if e := extractEndpoint(typ.Method(m)); e != nil {
+		if e := register.ExtractEndpoint(typ.Method(m)); e != nil {
 			e.Name = name + "." + e.Name

 			for k, v := range options.Metadata[e.Name] {
@@ -57,7 +51,7 @@ func (r *rpcHandler) Handler() interface{} {
 	return r.handler
 }

-func (r *rpcHandler) Endpoints() []*registry.Endpoint {
+func (r *rpcHandler) Endpoints() []*register.Endpoint {
 	return r.endpoints
 }

--- a/internal/errors/errors.go
+++ b/internal/errors/errors.go
@@ -1,159 +0,0 @@
-package errors
-
-import (
-	"fmt"
-)
-
-func (e *Error) Error() string {
-	return fmt.Sprintf(`{"id":"%s","code":%d,"detail":"%s","status":"%s"}`, e.Id, e.Code, e.Detail, e.Status)
-}
-
-// New generates a custom error.
-func New(id, detail string, code int32) error {
-	return &Error{
-		Id:     id,
-		Code:   code,
-		Detail: detail,
-		//	Status: http.StatusText(int(code)),
-	}
-}
-
-// BadRequest generates a 400 error.
-func BadRequest(id, format string, a ...interface{}) error {
-	return &Error{
-		Id:     id,
-		Code:   400,
-		Detail: fmt.Sprintf(format, a...),
-		//		Status: http.StatusText(400),
-	}
-}
-
-// Unauthorized generates a 401 error.
-func Unauthorized(id, format string, a ...interface{}) error {
-	return &Error{
-		Id:     id,
-		Code:   401,
-		Detail: fmt.Sprintf(format, a...),
-		//		Status: http.StatusText(401),
-	}
-}
-
-// Forbidden generates a 403 error.
-func Forbidden(id, format string, a ...interface{}) error {
-	return &Error{
-		Id:     id,
-		Code:   403,
-		Detail: fmt.Sprintf(format, a...),
-		//		Status: http.StatusText(403),
-	}
-}
-
-// NotFound generates a 404 error.
-func NotFound(id, format string, a ...interface{}) error {
-	return &Error{
-		Id:     id,
-		Code:   404,
-		Detail: fmt.Sprintf(format, a...),
-		//	Status: http.StatusText(404),
-	}
-}
-
-// MethodNotAllowed generates a 405 error.
-func MethodNotAllowed(id, format string, a ...interface{}) error {
-	return &Error{
-		Id:     id,
-		Code:   405,
-		Detail: fmt.Sprintf(format, a...),
-		//Status: http.StatusText(405),
-	}
-}
-
-// Timeout generates a 408 error.
-func Timeout(id, format string, a ...interface{}) error {
-	return &Error{
-		Id:     id,
-		Code:   408,
-		Detail: fmt.Sprintf(format, a...),
-		//Status: http.StatusText(408),
-	}
-}
-
-// Conflict generates a 409 error.
-func Conflict(id, format string, a ...interface{}) error {
-	return &Error{
-		Id:     id,
-		Code:   409,
-		Detail: fmt.Sprintf(format, a...),
-		//Status: http.StatusText(409),
-	}
-}
-
-// InternalServerError generates a 500 error.
-func InternalServerError(id, format string, a ...interface{}) error {
-	return &Error{
-		Id:     id,
-		Code:   500,
-		Detail: fmt.Sprintf(format, a...),
-		//Status: http.StatusText(500),
-	}
-}
-
-// NotImplemented generates a 501 error
-func NotImplemented(id, format string, a ...interface{}) error {
-	return &Error{
-		Id:     id,
-		Code:   501,
-		Detail: fmt.Sprintf(format, a...),
-		//Status: http.StatusText(501),
-	}
-}
-
-// BadGateway generates a 502 error
-func BadGateway(id, format string, a ...interface{}) error {
-	return &Error{
-		Id:     id,
-		Code:   502,
-		Detail: fmt.Sprintf(format, a...),
-		//	Status: http.StatusText(502),
-	}
-}
-
-// ServiceUnavailable generates a 503 error
-func ServiceUnavailable(id, format string, a ...interface{}) error {
-	return &Error{
-		Id:     id,
-		Code:   503,
-		Detail: fmt.Sprintf(format, a...),
-		//Status: http.StatusText(503),
-	}
-}
-
-// GatewayTimeout generates a 504 error
-func GatewayTimeout(id, format string, a ...interface{}) error {
-	return &Error{
-		Id:     id,
-		Code:   504,
-		Detail: fmt.Sprintf(format, a...),
-		//Status: http.StatusText(504),
-	}
-}
-
-// Equal tries to compare errors
-func Equal(err1 error, err2 error) bool {
-	verr1, ok1 := err1.(*Error)
-	verr2, ok2 := err2.(*Error)
-
-	if ok1 != ok2 {
-		return false
-	}
-
-	if !ok1 {
-		return err1 == err2
-	}
-
-	if verr1.Code != verr2.Code {
-		return false
-	}
-
-	return true
-}
--- a/internal/errors/server_errors.pb.go
+++ b/internal/errors/server_errors.pb.go
@@ -1,179 +0,0 @@
-// Code generated by protoc-gen-go. DO NOT EDIT.
-// versions:
-// 	protoc-gen-go v1.25.0-devel
-// 	protoc        v3.6.1
-// source: server_errors.proto
-
-package errors
-
-import (
-	proto "github.com/golang/protobuf/proto"
-	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
-	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
-	reflect "reflect"
-	sync "sync"
-)
-
-const (
-	// Verify that this generated code is sufficiently up-to-date.
-	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
-	// Verify that runtime/protoimpl is sufficiently up-to-date.
-	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
-)
-
-// This is a compile-time assertion that a sufficiently up-to-date version
-// of the legacy proto package is being used.
-const _ = proto.ProtoPackageIsVersion4
-
-type Error struct {
-	state         protoimpl.MessageState
-	sizeCache     protoimpl.SizeCache
-	unknownFields protoimpl.UnknownFields
-
-	Id     string `protobuf:"bytes,1,opt,name=id,proto3" json:"id,omitempty"`
-	Code   int32  `protobuf:"varint,2,opt,name=code,proto3" json:"code,omitempty"`
-	Detail string `protobuf:"bytes,3,opt,name=detail,proto3" json:"detail,omitempty"`
-	Status string `protobuf:"bytes,4,opt,name=status,proto3" json:"status,omitempty"`
-}
-
-func (x *Error) Reset() {
-	*x = Error{}
-	if protoimpl.UnsafeEnabled {
-		mi := &file_server_errors_proto_msgTypes[0]
-		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
-		ms.StoreMessageInfo(mi)
-	}
-}
-
-func (x *Error) String() string {
-	return protoimpl.X.MessageStringOf(x)
-}
-
-func (*Error) ProtoMessage() {}
-
-func (x *Error) ProtoReflect() protoreflect.Message {
-	mi := &file_server_errors_proto_msgTypes[0]
-	if protoimpl.UnsafeEnabled && x != nil {
-		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
-		if ms.LoadMessageInfo() == nil {
-			ms.StoreMessageInfo(mi)
-		}
-		return ms
-	}
-	return mi.MessageOf(x)
-}
-
-// Deprecated: Use Error.ProtoReflect.Descriptor instead.
-func (*Error) Descriptor() ([]byte, []int) {
-	return file_server_errors_proto_rawDescGZIP(), []int{0}
-}
-
-func (x *Error) GetId() string {
-	if x != nil {
-		return x.Id
-	}
-	return ""
-}
-
-func (x *Error) GetCode() int32 {
-	if x != nil {
-		return x.Code
-	}
-	return 0
-}
-
-func (x *Error) GetDetail() string {
-	if x != nil {
-		return x.Detail
-	}
-	return ""
-}
-
-func (x *Error) GetStatus() string {
-	if x != nil {
-		return x.Status
-	}
-	return ""
-}
-
-var File_server_errors_proto protoreflect.FileDescriptor
-
-var file_server_errors_proto_rawDesc = []byte{
-	0x0a, 0x13, 0x73, 0x65, 0x72, 0x76, 0x65, 0x72, 0x5f, 0x65, 0x72, 0x72, 0x6f, 0x72, 0x73, 0x2e,
-	0x70, 0x72, 0x6f, 0x74, 0x6f, 0x12, 0x19, 0x6f, 0x72, 0x67, 0x2e, 0x75, 0x6e, 0x69, 0x73, 0x74,
-	0x61, 0x63, 0x6b, 0x2e, 0x6d, 0x69, 0x63, 0x72, 0x6f, 0x2e, 0x65, 0x72, 0x72, 0x6f, 0x72, 0x73,
-	0x22, 0x5b, 0x0a, 0x05, 0x45, 0x72, 0x72, 0x6f, 0x72, 0x12, 0x0e, 0x0a, 0x02, 0x69, 0x64, 0x18,
-	0x01, 0x20, 0x01, 0x28, 0x09, 0x52, 0x02, 0x69, 0x64, 0x12, 0x12, 0x0a, 0x04, 0x63, 0x6f, 0x64,
-	0x65, 0x18, 0x02, 0x20, 0x01, 0x28, 0x05, 0x52, 0x04, 0x63, 0x6f, 0x64, 0x65, 0x12, 0x16, 0x0a,
-	0x06, 0x64, 0x65, 0x74, 0x61, 0x69, 0x6c, 0x18, 0x03, 0x20, 0x01, 0x28, 0x09, 0x52, 0x06, 0x64,
-	0x65, 0x74, 0x61, 0x69, 0x6c, 0x12, 0x16, 0x0a, 0x06, 0x73, 0x74, 0x61, 0x74, 0x75, 0x73, 0x18,
-	0x04, 0x20, 0x01, 0x28, 0x09, 0x52, 0x06, 0x73, 0x74, 0x61, 0x74, 0x75, 0x73, 0x42, 0x3b, 0x5a,
-	0x39, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x75, 0x6e, 0x69, 0x73,
-	0x74, 0x61, 0x63, 0x6b, 0x2d, 0x6f, 0x72, 0x67, 0x2f, 0x6d, 0x69, 0x63, 0x72, 0x6f, 0x2d, 0x73,
-	0x65, 0x72, 0x76, 0x65, 0x72, 0x2d, 0x67, 0x72, 0x70, 0x63, 0x2f, 0x69, 0x6e, 0x74, 0x65, 0x72,
-	0x6e, 0x61, 0x6c, 0x2f, 0x65, 0x72, 0x72, 0x6f, 0x72, 0x73, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74,
-	0x6f, 0x33,
-}
-
-var (
-	file_server_errors_proto_rawDescOnce sync.Once
-	file_server_errors_proto_rawDescData = file_server_errors_proto_rawDesc
-)
-
-func file_server_errors_proto_rawDescGZIP() []byte {
-	file_server_errors_proto_rawDescOnce.Do(func() {
-		file_server_errors_proto_rawDescData = protoimpl.X.CompressGZIP(file_server_errors_proto_rawDescData)
-	})
-	return file_server_errors_proto_rawDescData
-}
-
-var file_server_errors_proto_msgTypes = make([]protoimpl.MessageInfo, 1)
-var file_server_errors_proto_goTypes = []interface{}{
-	(*Error)(nil), // 0: org.unistack.micro.errors.Error
-}
-var file_server_errors_proto_depIdxs = []int32{
-	0, // [0:0] is the sub-list for method output_type
-	0, // [0:0] is the sub-list for method input_type
-	0, // [0:0] is the sub-list for extension type_name
-	0, // [0:0] is the sub-list for extension extendee
-	0, // [0:0] is the sub-list for field type_name
-}
-
-func init() { file_server_errors_proto_init() }
-func file_server_errors_proto_init() {
-	if File_server_errors_proto != nil {
-		return
-	}
-	if !protoimpl.UnsafeEnabled {
-		file_server_errors_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*Error); i {
-			case 0:
-				return &v.state
-			case 1:
-				return &v.sizeCache
-			case 2:
-				return &v.unknownFields
-			default:
-				return nil
-			}
-		}
-	}
-	type x struct{}
-	out := protoimpl.TypeBuilder{
-		File: protoimpl.DescBuilder{
-			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
-			RawDescriptor: file_server_errors_proto_rawDesc,
-			NumEnums:      0,
-			NumMessages:   1,
-			NumExtensions: 0,
-			NumServices:   0,
-		},
-		GoTypes:           file_server_errors_proto_goTypes,
-		DependencyIndexes: file_server_errors_proto_depIdxs,
-		MessageInfos:      file_server_errors_proto_msgTypes,
-	}.Build()
-	File_server_errors_proto = out.File
-	file_server_errors_proto_rawDesc = nil
-	file_server_errors_proto_goTypes = nil
-	file_server_errors_proto_depIdxs = nil
-}
--- a/internal/errors/server_errors.proto
+++ b/internal/errors/server_errors.proto
@@ -1,11 +0,0 @@
-syntax = "proto3";
-
-option go_package = "github.com/unistack-org/micro-server-grpc/internal/errors";
-package org.unistack.micro.errors;
-
-message Error {
-  string id = 1;
-  int32 code = 2;
-  string detail = 3;
-  string status = 4;
-};
--- a/options.go
+++ b/options.go
@@ -2,21 +2,19 @@ package grpc

 import (
 	"context"
-	"crypto/tls"
-	"net"

-	"github.com/unistack-org/micro/v3/server"
+	"go.unistack.org/micro/v3/server"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/encoding"
 )

-type codecsKey struct{}
-type grpcOptions struct{}
-type netListener struct{}
-type maxMsgSizeKey struct{}
-type maxConnKey struct{}
-type tlsAuth struct{}
-type reflectionKey struct{}
+type (
+	codecsKey                struct{}
+	grpcOptions              struct{}
+	maxMsgSizeKey            struct{}
+	reflectionKey            struct{}
+	unknownServiceHandlerKey struct{}
+)

 // gRPC Codec to be used to encode/decode requests for a given content type
 func Codec(contentType string, c encoding.Codec) server.Option {
@@ -33,35 +31,24 @@ func Codec(contentType string, c encoding.Codec) server.Option {
 	}
 }

-// AuthTLS should be used to setup a secure authentication using TLS
-func AuthTLS(t *tls.Config) server.Option {
-	return setServerOption(tlsAuth{}, t)
-}
-
-// MaxConn specifies maximum number of max simultaneous connections to server
-func MaxConn(n int) server.Option {
-	return setServerOption(maxConnKey{}, n)
-}
-
-// Listener specifies the net.Listener to use instead of the default
-func Listener(l net.Listener) server.Option {
-	return setServerOption(netListener{}, l)
-}
-
 // Options to be used to configure gRPC options
 func Options(opts ...grpc.ServerOption) server.Option {
-	return setServerOption(grpcOptions{}, opts)
+	return server.SetOption(grpcOptions{}, opts)
 }

 //
 // MaxMsgSize set the maximum message in bytes the server can receive and
-// send.  Default maximum message size is 4 MB.
-//
+// send. Default maximum message size is 4 MB.
 func MaxMsgSize(s int) server.Option {
-	return setServerOption(maxMsgSizeKey{}, s)
+	return server.SetOption(maxMsgSizeKey{}, s)
 }

 // Reflection enables reflection support in grpc server
 func Reflection(b bool) server.Option {
-	return setServerOption(reflectionKey{}, b)
+	return server.SetOption(reflectionKey{}, b)
+}
+
+// UnknownServiceHandler enables support for all services
+func UnknownServiceHandler(h grpc.StreamHandler) server.Option {
+	return server.SetOption(unknownServiceHandlerKey{}, h)
 }
--- a/reflection.go
+++ b/reflection.go
@@ -1,3 +1,5 @@
+// +build ignore
+
 /*
 *
 * Copyright 2016 gRPC authors.
--- a/request.go
+++ b/request.go
@@ -1,28 +1,36 @@
 package grpc

 import (
-	"github.com/unistack-org/micro/v3/codec"
-	"github.com/unistack-org/micro-codec-bytes"
+	"io"
+
+	"go.unistack.org/micro/v3/codec"
+	"go.unistack.org/micro/v3/metadata"
+	"go.unistack.org/micro/v3/server"
+)
+
+var (
+	_ server.Request = &rpcRequest{}
+	_ server.Message = &rpcMessage{}
 )

 type rpcRequest struct {
-	service     string
-	method      string
-	contentType string
-	codec       codec.Codec
-	header      map[string]string
-	body        []byte
-	stream      bool
+	rw          io.ReadWriter
 	payload     interface{}
+	codec       codec.Codec
+	header      metadata.Metadata
+	method      string
+	endpoint    string
+	contentType string
+	service     string
+	stream      bool
 }

 type rpcMessage struct {
+	payload     interface{}
+	codec       codec.Codec
+	header      metadata.Metadata
 	topic       string
 	contentType string
-	payload     interface{}
-	header      map[string]string
-	body        []byte
-	codec       codec.Codec
 }

 func (r *rpcRequest) ContentType() string {
@@ -38,20 +46,20 @@ func (r *rpcRequest) Method() string {
 }

 func (r *rpcRequest) Endpoint() string {
-	return r.method
+	return r.endpoint
 }

-func (r *rpcRequest) Codec() codec.Reader {
+func (r *rpcRequest) Codec() codec.Codec {
 	return r.codec
 }

-func (r *rpcRequest) Header() map[string]string {
+func (r *rpcRequest) Header() metadata.Metadata {
 	return r.header
 }

 func (r *rpcRequest) Read() ([]byte, error) {
-	f := &bytes.Frame{}
-	if err := r.codec.ReadBody(f); err != nil {
+	f := &codec.Frame{}
+	if err := r.codec.ReadBody(r.rw, f); err != nil {
 		return nil, err
 	}
 	return f.Data, nil
@@ -73,18 +81,14 @@ func (r *rpcMessage) Topic() string {
 	return r.topic
 }

-func (r *rpcMessage) Payload() interface{} {
+func (r *rpcMessage) Body() interface{} {
 	return r.payload
 }

-func (r *rpcMessage) Header() map[string]string {
+func (r *rpcMessage) Header() metadata.Metadata {
 	return r.header
 }

-func (r *rpcMessage) Body() []byte {
-	return r.body
-}
-
-func (r *rpcMessage) Codec() codec.Reader {
+func (r *rpcMessage) Codec() codec.Codec {
 	return r.codec
 }
--- a/response.go
+++ b/response.go
@@ -1,26 +1,33 @@
 package grpc

 import (
-	"github.com/unistack-org/micro/v3/codec"
+	"io"
+
+	"go.unistack.org/micro/v3/codec"
+	"go.unistack.org/micro/v3/metadata"
+	"go.unistack.org/micro/v3/server"
 )

+var _ server.Response = &rpcResponse{}
+
 type rpcResponse struct {
-	header map[string]string
+	rw     io.ReadWriter
+	header metadata.Metadata
 	codec  codec.Codec
 }

-func (r *rpcResponse) Codec() codec.Writer {
+func (r *rpcResponse) Codec() codec.Codec {
 	return r.codec
 }

-func (r *rpcResponse) WriteHeader(hdr map[string]string) {
+func (r *rpcResponse) WriteHeader(hdr metadata.Metadata) {
 	for k, v := range hdr {
 		r.header[k] = v
 	}
 }

 func (r *rpcResponse) Write(b []byte) error {
-	return r.codec.Write(&codec.Message{
+	return r.codec.Write(r.rw, &codec.Message{
 		Header: r.header,
 		Body:   b,
 	}, nil)
--- a/server.go
+++ b/server.go
@@ -14,38 +14,35 @@ import (
 	"unicode"
 	"unicode/utf8"

-	"github.com/unistack-org/micro/v3/logger"
-	"github.com/unistack-org/micro/v3/server"
+	"go.unistack.org/micro/v3/server"
 )

-var (
-	// Precompute the reflect type for error. Can't use error directly
-	// because Typeof takes an empty interface value. This is annoying.
-	typeOfError = reflect.TypeOf((*error)(nil)).Elem()
-)
+// Precompute the reflect type for error. Can't use error directly
+// because Typeof takes an empty interface value. This is annoying.
+var typeOfError = reflect.TypeOf((*error)(nil)).Elem()

 type methodType struct {
-	method      reflect.Method
 	ArgType     reflect.Type
 	ReplyType   reflect.Type
 	ContextType reflect.Type
+	method      reflect.Method
 	stream      bool
 }

-type reflectionType func(context.Context, server.Stream) error
+// type reflectionType func(context.Context, server.Stream) error

 type service struct {
-	name   string                 // name of service
-	rcvr   reflect.Value          // receiver of methods for the service
-	typ    reflect.Type           // type of the receiver
-	method map[string]*methodType // registered methods
+	typ    reflect.Type
+	method map[string]*methodType
+	rcvr   reflect.Value
+	name   string
 }

 // server represents an RPC Server.
 type rServer struct {
-	mu         sync.RWMutex // protects the serviceMap
 	serviceMap map[string]*service
-	reflection bool
+	mu         sync.RWMutex
+	// reflection bool
 }

 // Is this an exported - upper case - name?
@@ -66,7 +63,7 @@ func isExportedOrBuiltinType(t reflect.Type) bool {

 // prepareEndpoint() returns a methodType for the provided method or nil
 // in case if the method was unsuitable.
-func prepareEndpoint(method reflect.Method) *methodType {
+func prepareEndpoint(method reflect.Method) (*methodType, error) {
 	mtype := method.Type
 	mname := method.Name
 	var replyType, argType, contextType reflect.Type
@@ -74,7 +71,7 @@ func prepareEndpoint(method reflect.Method) *methodType {

 	// Endpoint() must be exported.
 	if method.PkgPath != "" {
-		return nil
+		return nil, fmt.Errorf("Endpoint must be exported")
 	}

 	switch mtype.NumIn() {
@@ -89,63 +86,41 @@ func prepareEndpoint(method reflect.Method) *methodType {
 		replyType = mtype.In(3)
 		contextType = mtype.In(1)
 	default:
-		if logger.V(logger.ErrorLevel) {
-			logger.Errorf("method %v of %v has wrong number of ins: %v", mname, mtype, mtype.NumIn())
-		}
-		return nil
+		return nil, fmt.Errorf("method %v of %v has wrong number of ins: %v", mname, mtype, mtype.NumIn())
 	}

-	if stream {
+	switch stream {
+	case true:
 		// check stream type
 		streamType := reflect.TypeOf((*server.Stream)(nil)).Elem()
 		if !argType.Implements(streamType) {
-			if logger.V(logger.ErrorLevel) {
-				logger.Errorf("%v argument does not implement Streamer interface: %v", mname, argType)
-			}
-			return nil
+			return nil, fmt.Errorf("%v argument does not implement Streamer interface: %v", mname, argType)
 		}
-	} else {
-		// if not stream check the replyType
-
+	default:
 		// First arg need not be a pointer.
 		if !isExportedOrBuiltinType(argType) {
-			if logger.V(logger.ErrorLevel) {
-				logger.Errorf("%v argument type not exported: %v", mname, argType)
-			}
-			return nil
+			return nil, fmt.Errorf("%v argument type not exported: %v", mname, argType)
 		}

 		if replyType.Kind() != reflect.Ptr {
-			if logger.V(logger.ErrorLevel) {
-				logger.Errorf("method %v reply type not a pointer: %v", mname, replyType)
-			}
-			return nil
+			return nil, fmt.Errorf("method %v reply type not a pointer: %v", mname, replyType)
 		}

 		// Reply type must be exported.
 		if !isExportedOrBuiltinType(replyType) {
-			if logger.V(logger.ErrorLevel) {
-				logger.Errorf("method %v reply type not exported: %v", mname, replyType)
-			}
-			return nil
+			return nil, fmt.Errorf("method %v reply type not exported: %v", mname, replyType)
 		}
 	}

 	// Endpoint() needs one out.
 	if mtype.NumOut() != 1 {
-		if logger.V(logger.ErrorLevel) {
-			logger.Errorf("method %v has wrong number of outs: %v", mname, mtype.NumOut())
-		}
-		return nil
+		return nil, fmt.Errorf("method %v has wrong number of outs: %v", mname, mtype.NumOut())
 	}
 	// The return type of the method must be error.
 	if returnType := mtype.Out(0); returnType != typeOfError {
-		if logger.V(logger.ErrorLevel) {
-			logger.Errorf("method %v returns %v not error", mname, returnType.String())
-		}
-		return nil
+		return nil, fmt.Errorf("method %v returns %v not error", mname, returnType.String())
 	}
-	return &methodType{method: method, ArgType: argType, ReplyType: replyType, ContextType: contextType, stream: stream}
+	return &methodType{method: method, ArgType: argType, ReplyType: replyType, ContextType: contextType, stream: stream}, nil
 }

 func (server *rServer) register(rcvr interface{}) error {
@@ -162,11 +137,7 @@ func (server *rServer) register(rcvr interface{}) error {
 		return fmt.Errorf("rpc: no service name for type %v", s.typ.String())
 	}
 	if !isExported(sname) {
-		s := "rpc Register: type " + sname + " is not exported"
-		if logger.V(logger.ErrorLevel) {
-			logger.Error(s)
-		}
-		return fmt.Errorf(s)
+		return fmt.Errorf("rpc Register: type %s is not exported", sname)
 	}
 	if _, present := server.serviceMap[sname]; present {
 		return fmt.Errorf("rpc: service already defined: " + sname)
@@ -177,17 +148,16 @@ func (server *rServer) register(rcvr interface{}) error {
 	// Install the methods
 	for m := 0; m < s.typ.NumMethod(); m++ {
 		method := s.typ.Method(m)
-		if mt := prepareEndpoint(method); mt != nil {
+		mt, err := prepareEndpoint(method)
+		if mt != nil && err == nil {
 			s.method[method.Name] = mt
+		} else if err != nil {
+			return err
 		}
 	}

 	if len(s.method) == 0 {
-		s := "rpc Register: type " + sname + " has no exported methods of suitable type"
-		if logger.V(logger.ErrorLevel) {
-			logger.Error(s)
-		}
-		return fmt.Errorf(s)
+		return fmt.Errorf("rpc Register: type %s has no exported methods of suitable type", sname)
 	}
 	server.serviceMap[s.name] = s
 	return nil
--- a/stream.go
+++ b/stream.go
@@ -3,7 +3,7 @@ package grpc
 import (
 	"context"

-	"github.com/unistack-org/micro/v3/server"
+	"go.unistack.org/micro/v3/server"
 	"google.golang.org/grpc"
 )

--- a/subscriber.go
+++ b/subscriber.go
@@ -7,22 +7,18 @@ import (
 	"runtime/debug"
 	"strings"

-	"github.com/unistack-org/micro/v3/broker"
-	"github.com/unistack-org/micro/v3/errors"
-	"github.com/unistack-org/micro/v3/logger"
-	"github.com/unistack-org/micro/v3/metadata"
-	"github.com/unistack-org/micro/v3/registry"
-	"github.com/unistack-org/micro/v3/server"
-)
-
-const (
-	subSig = "func(context.Context, interface{}) error"
+	"go.unistack.org/micro/v3/broker"
+	"go.unistack.org/micro/v3/errors"
+	"go.unistack.org/micro/v3/logger"
+	"go.unistack.org/micro/v3/metadata"
+	"go.unistack.org/micro/v3/register"
+	"go.unistack.org/micro/v3/server"
 )

 type handler struct {
-	method  reflect.Value
 	reqType reflect.Type
 	ctxType reflect.Type
+	method  reflect.Value
 }

 type subscriber struct {
@@ -31,17 +27,14 @@ type subscriber struct {
 	typ        reflect.Type
 	subscriber interface{}
 	handlers   []*handler
-	endpoints  []*registry.Endpoint
+	endpoints  []*register.Endpoint
 	opts       server.SubscriberOptions
 }

 func newSubscriber(topic string, sub interface{}, opts ...server.SubscriberOption) server.Subscriber {
-	options := server.NewSubscriberOptions()
-	for _, o := range opts {
-		o(&options)
-	}
+	options := server.NewSubscriberOptions(opts...)

-	var endpoints []*registry.Endpoint
+	var endpoints []*register.Endpoint
 	var handlers []*handler

 	if typ := reflect.TypeOf(sub); typ.Kind() == reflect.Func {
@@ -59,9 +52,9 @@ func newSubscriber(topic string, sub interface{}, opts ...server.SubscriberOptio

 		handlers = append(handlers, h)

-		endpoints = append(endpoints, &registry.Endpoint{
+		endpoints = append(endpoints, &register.Endpoint{
 			Name:    "Func",
-			Request: extractSubValue(typ),
+			Request: register.ExtractSubValue(typ),
 			Metadata: map[string]string{
 				"topic":      topic,
 				"subscriber": "true",
@@ -87,9 +80,9 @@ func newSubscriber(topic string, sub interface{}, opts ...server.SubscriberOptio

 			handlers = append(handlers, h)

-			endpoints = append(endpoints, &registry.Endpoint{
+			endpoints = append(endpoints, &register.Endpoint{
 				Name:    name + "." + method.Name,
-				Request: extractSubValue(method.Type),
+				Request: register.ExtractSubValue(method.Type),
 				Metadata: map[string]string{
 					"topic":      topic,
 					"subscriber": "true",
@@ -109,67 +102,13 @@ func newSubscriber(topic string, sub interface{}, opts ...server.SubscriberOptio
 	}
 }

-func validateSubscriber(sub server.Subscriber) error {
-	typ := reflect.TypeOf(sub.Subscriber())
-	var argType reflect.Type
-
-	if typ.Kind() == reflect.Func {
-		name := "Func"
-		switch typ.NumIn() {
-		case 2:
-			argType = typ.In(1)
-		default:
-			return fmt.Errorf("subscriber %v takes wrong number of args: %v required signature %s", name, typ.NumIn(), subSig)
-		}
-		if !isExportedOrBuiltinType(argType) {
-			return fmt.Errorf("subscriber %v argument type not exported: %v", name, argType)
-		}
-		if typ.NumOut() != 1 {
-			return fmt.Errorf("subscriber %v has wrong number of outs: %v require signature %s",
-				name, typ.NumOut(), subSig)
-		}
-		if returnType := typ.Out(0); returnType != typeOfError {
-			return fmt.Errorf("subscriber %v returns %v not error", name, returnType.String())
-		}
-	} else {
-		hdlr := reflect.ValueOf(sub.Subscriber())
-		name := reflect.Indirect(hdlr).Type().Name()
-
-		for m := 0; m < typ.NumMethod(); m++ {
-			method := typ.Method(m)
-
-			switch method.Type.NumIn() {
-			case 3:
-				argType = method.Type.In(2)
-			default:
-				return fmt.Errorf("subscriber %v.%v takes wrong number of args: %v required signature %s",
-					name, method.Name, method.Type.NumIn(), subSig)
-			}
-
-			if !isExportedOrBuiltinType(argType) {
-				return fmt.Errorf("%v argument type not exported: %v", name, argType)
-			}
-			if method.Type.NumOut() != 1 {
-				return fmt.Errorf(
-					"subscriber %v.%v has wrong number of outs: %v require signature %s",
-					name, method.Name, method.Type.NumOut(), subSig)
-			}
-			if returnType := method.Type.Out(0); returnType != typeOfError {
-				return fmt.Errorf("subscriber %v.%v returns %v not error", name, method.Name, returnType.String())
-			}
-		}
-	}
-
-	return nil
-}
-
 func (g *grpcServer) createSubHandler(sb *subscriber, opts server.Options) broker.Handler {
 	return func(p broker.Event) (err error) {
 		defer func() {
 			if r := recover(); r != nil {
-				if logger.V(logger.ErrorLevel) {
-					logger.Error("panic recovered: ", r)
-					logger.Error(string(debug.Stack()))
+				if g.opts.Logger.V(logger.ErrorLevel) {
+					g.opts.Logger.Error(g.opts.Context, "panic recovered: ", r)
+					g.opts.Logger.Error(g.opts.Context, string(debug.Stack()))
 				}
 				err = errors.InternalServerError(g.opts.Name+".subscriber", "panic recovered: %v", r)
 			}
@@ -183,20 +122,23 @@ func (g *grpcServer) createSubHandler(sb *subscriber, opts server.Options) broke

 		ct := msg.Header["Content-Type"]
 		if len(ct) == 0 {
-			msg.Header["Content-Type"] = defaultContentType
-			ct = defaultContentType
+			msg.Header["Content-Type"] = DefaultContentType
+			ct = DefaultContentType
 		}
-		cf, err := g.newGRPCCodec(ct)
+		cf, err := g.newCodec(ct)
 		if err != nil {
 			return err
 		}

 		hdr := make(map[string]string, len(msg.Header))
 		for k, v := range msg.Header {
+			if k == "Content-Type" {
+				continue
+			}
 			hdr[k] = v
 		}
-		delete(hdr, "Content-Type")
-		ctx := metadata.NewContext(sb.opts.Context, hdr)
+
+		ctx := metadata.NewIncomingContext(sb.opts.Context, hdr)

 		results := make(chan error, len(sb.handlers))

@@ -229,7 +171,7 @@ func (g *grpcServer) createSubHandler(sb *subscriber, opts server.Options) broke
 					vals = append(vals, reflect.ValueOf(ctx))
 				}

-				vals = append(vals, reflect.ValueOf(msg.Payload()))
+				vals = append(vals, reflect.ValueOf(msg.Body()))

 				returnValues := handler.method.Call(vals)
 				if rerr := returnValues[0].Interface(); rerr != nil {
@@ -249,14 +191,13 @@ func (g *grpcServer) createSubHandler(sb *subscriber, opts server.Options) broke
 				if g.wg != nil {
 					defer g.wg.Done()
 				}
-				err := fn(ctx, &rpcMessage{
+				cerr := fn(ctx, &rpcMessage{
 					topic:       sb.topic,
 					contentType: ct,
 					payload:     req.Interface(),
 					header:      msg.Header,
-					body:        msg.Body,
 				})
-				results <- err
+				results <- cerr
 			}()
 		}
 		var errors []string
@@ -281,7 +222,7 @@ func (s *subscriber) Subscriber() interface{} {
 	return s.subscriber
 }

-func (s *subscriber) Endpoints() []*registry.Endpoint {
+func (s *subscriber) Endpoints() []*register.Endpoint {
 	return s.endpoints
 }

--- a/util.go
+++ b/util.go
@@ -0,0 +1,59 @@
+package grpc
+
+import (
+	"fmt"
+	"strings"
+)
+
+// ServiceMethod converts a gRPC method to a Go method
+// Input:
+// Foo.Bar, /Foo/Bar, /package.Foo/Bar, /a.package.Foo/Bar
+// Output:
+// [Foo, Bar]
+func serviceMethod(m string) (string, string, error) {
+	if len(m) == 0 {
+		return "", "", fmt.Errorf("malformed method name: %q", m)
+	}
+
+	// grpc method
+	if m[0] == '/' {
+		// [ , Foo, Bar]
+		// [ , package.Foo, Bar]
+		// [ , a.package.Foo, Bar]
+		parts := strings.Split(m, "/")
+		if len(parts) != 3 || len(parts[1]) == 0 || len(parts[2]) == 0 {
+			return "", "", fmt.Errorf("malformed method name: %q", m)
+		}
+		service := strings.Split(parts[1], ".")
+		return service[len(service)-1], parts[2], nil
+	}
+
+	// non grpc method
+	parts := strings.Split(m, ".")
+
+	// expect [Foo, Bar]
+	if len(parts) != 2 {
+		return "", "", fmt.Errorf("malformed method name: %q", m)
+	}
+
+	return parts[0], parts[1], nil
+}
+
+/*
+// ServiceFromMethod returns the service
+// /service.Foo/Bar => service
+func serviceFromMethod(m string) string {
+	if len(m) == 0 {
+		return m
+	}
+	if m[0] != '/' {
+		return m
+	}
+	parts := strings.Split(m, "/")
+	if len(parts) < 3 {
+		return m
+	}
+	parts = strings.Split(parts[1], ".")
+	return strings.Join(parts[:len(parts)-1], ".")
+}
+*/
--- a/util_test.go
+++ b/util_test.go
@@ -0,0 +1,46 @@
+package grpc
+
+import (
+	"testing"
+)
+
+func TestServiceMethod(t *testing.T) {
+	type testCase struct {
+		input   string
+		service string
+		method  string
+		err     bool
+	}
+
+	methods := []testCase{
+		{"Foo.Bar", "Foo", "Bar", false},
+		{"/Foo/Bar", "Foo", "Bar", false},
+		{"/package.Foo/Bar", "Foo", "Bar", false},
+		{"/a.package.Foo/Bar", "Foo", "Bar", false},
+		{"a.package.Foo/Bar", "", "", true},
+		{"/Foo/Bar/Baz", "", "", true},
+		{"Foo.Bar.Baz", "", "", true},
+	}
+	for _, test := range methods {
+		service, method, err := serviceMethod(test.input)
+		if err != nil && test.err == true {
+			continue
+		}
+		// unexpected error
+		if err != nil && test.err == false {
+			t.Fatalf("unexpected err %v for %+v", err, test)
+		}
+		// expecter error
+		if test.err == true && err == nil {
+			t.Fatalf("expected error for %+v: got service: %s method: %s", test, service, method)
+		}
+
+		if service != test.service {
+			t.Fatalf("wrong service for %+v: got service: %s method: %s", test, service, method)
+		}
+
+		if method != test.method {
+			t.Fatalf("wrong method for %+v: got service: %s method: %s", test, service, method)
+		}
+	}
+}