[FAB-9410] Import Discovery Client

Change-Id: I9d124ae5c5331dca02c0d5e83bd08583255ed897
Signed-off-by: Bob Stasyszyn <Bob.Stasyszyn@securekey.com>

Author: bstasyszyn

Makefile

@@ -66,7 +66,7 @@ FABRIC_DEV_REGISTRY_PRE_CMD ?= docker login -u docker -p docker nexus3.hyperledg
 THIRDPARTY_FABRIC_CA_BRANCH ?= master
 THIRDPARTY_FABRIC_CA_COMMIT ?= v1.1.0
 THIRDPARTY_FABRIC_BRANCH    ?= master
-THIRDPARTY_FABRIC_COMMIT    ?= 30806c107fe89e29d6c80b6244a57477242f241f
+THIRDPARTY_FABRIC_COMMIT    ?= 68f268379c78cabbd4325fc2e40059a8c46912ae
 
 # Force removal of images in cleanup (overridable)
 FIXTURE_DOCKER_REMOVE_FORCE ?= false

internal/github.com/hyperledger/fabric/common/crypto/signer.go

@@ -1,17 +1,7 @@
 /*
-Copyright IBM Corp. 2016 All Rights Reserved.
+Copyright IBM Corp. All Rights Reserved.
 
-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.
+SPDX-License-Identifier: Apache-2.0
 */
 /*
 Notice: This file has been modified for Hyperledger Fabric SDK Go usage.
@@ -20,13 +10,41 @@ Please review third_party pinning scripts and patches for more details.
 
 package crypto
 
-import cb "github.com/hyperledger/fabric-sdk-go/third_party/github.com/hyperledger/fabric/protos/common"
+import (
+	cb "github.com/hyperledger/fabric-sdk-go/third_party/github.com/hyperledger/fabric/protos/common"
+)
 
 // LocalSigner is a temporary stub interface which will be implemented by the local MSP
 type LocalSigner interface {
+	SignatureHeaderMaker
+	Signer
+}
+
+// Signer signs messages
+type Signer interface {
+	// Sign a message and return the signature over the digest, or error on failure
+	Sign(message []byte) ([]byte, error)
+}
+
+// IdentitySerializer serializes identities
+type IdentitySerializer interface {
+	// Serialize converts an identity to bytes
+	Serialize() ([]byte, error)
+}
+
+// SignatureHeaderMaker creates a new SignatureHeader
+type SignatureHeaderMaker interface {
 	// NewSignatureHeader creates a SignatureHeader with the correct signing identity and a valid nonce
 	NewSignatureHeader() (*cb.SignatureHeader, error)
+}
 
-	// Sign a message which should embed a signature header created by NewSignatureHeader
-	Sign(message []byte) ([]byte, error)
+// SignatureHeaderCreator creates signature headers
+type SignatureHeaderCreator struct {
+	SignerSupport
+}
+
+// SignerSupport implements the needed support for LocalSigner
+type SignerSupport interface {
+	Signer
+	IdentitySerializer
 }

internal/github.com/hyperledger/fabric/discovery/client/client.go

@@ -143,7 +143,6 @@ func (c *client) Send(ctx context.Context, req *Request) (Response, error) {
 		return nil, errors.Wrap(err, "failed connecting to discovery service")
 	}
 
-	defer conn.Close()
 	defer func() {
 		req.Queries = nil
 	}()