[FAB-3423] Remove unsafe type assertions in config.go

Change-Id: I2a5fac0759e1800182ebe06af06b57ceea4da930
Signed-off-by: Divyank Katira <[email protected]>

.gitignore

@@ -1 +1,3 @@
 *.db
+*report.xml
+.DS_Store

README.md

@@ -1,14 +1,12 @@
 # Hyperledger Fabric Client SDK for Go
-[![Build Status](https://jenkins.hyperledger.org/buildStatus/icon?job=fabric-sdk-go-tests-verify-x86_64)](https://jenkins.hyperledger.org/job/fabric-sdk-go-tests-verify-x86_64)
+[![Build Status](https://jenkins.hyperledger.org/buildStatus/icon?job=fabric-sdk-go-tests-merge-x86_64)](https://jenkins.hyperledger.org/job/fabric-sdk-go-tests-merge-x86_64)
 [![Go Report Card](https://goreportcard.com/badge/github.com/hyperledger/fabric-sdk-go)](https://goreportcard.com/report/github.com/hyperledger/fabric-sdk-go)
 [![GoDoc](https://godoc.org/github.com/hyperledger/fabric-sdk-go?status.svg)](https://godoc.org/github.com/hyperledger/fabric-sdk-go)
 
 The Hyperledger Fabric Client SDK makes it easy to use APIs to interact with a Hyperledger Fabric blockchain.
 
 This SDK is targeted both towards the external access to a Hyperledger Fabric blockchain using a Go application, as well as being targeted at the internal library in a peer to access API functions on other parts of the network.
 
-**NOTE:** In an effort to make the codebase more modular, there will be interface changes over the course of the next week.
-
 This is a **read-only mirror** of the formal [Gerrit](https://gerrit.hyperledger.org/r/#/admin/projects/fabric-sdk-go)
 repository, where active development is ongoing. Issue tracking is handled in [Jira](https://jira.hyperledger.org/secure/RapidBoard.jspa?projectKey=FAB&rapidView=7&view=planning)
 
@@ -50,4 +48,3 @@ go test
 This client was last tested and found to be compatible with the following Hyperledger Fabric commit levels:
 - fabric: v1.0.0-alpha
 - fabric-ca: v1.0.0-alpha
-

config/config.go

@@ -33,15 +33,17 @@ import (
 	"github.com/spf13/viper"
 )
 
-// PeerConfig ...
+// PeerConfig A set of configurations required to connect to a Fabric peer
 type PeerConfig struct {
-	Host                  string
-	Port                  string
-	EventHost             string
-	EventPort             string
-	TLSCertificate        string
-	TLSServerHostOverride string
-	Primary               bool
+	Host      string
+	Port      int
+	EventHost string
+	EventPort int
+	Primary   bool
+	TLS       struct {
+		Certificate        string
+		ServerHostOverride string
+	}
 }
 
 var myViper = viper.New()
@@ -121,59 +123,27 @@ func GetFabricClientViper() *viper.Viper {
 	return myViper
 }
 
-// GetPeersConfig ...
-func GetPeersConfig() []PeerConfig {
+// GetPeersConfig Retrieves the fabric peers from the config file provided
+func GetPeersConfig() ([]PeerConfig, error) {
 	peersConfig := []PeerConfig{}
-	peers := myViper.GetStringMap("client.peers")
-	for key, value := range peers {
-		mm, ok := value.(map[string]interface{})
-		var host string
-		var port int
-		var primary bool
-		var eventHost string
-		var eventPort int
-		var tlsCertificate string
-		var tlsServerHostOverride string
-
-		if ok {
-			host, _ = mm["host"].(string)
-			port, _ = mm["port"].(int)
-			primary, _ = mm["primary"].(bool)
-			eventHost, _ = mm["event_host"].(string)
-			eventPort, _ = mm["event_port"].(int)
-			tlsCertificate, _ = mm["tls"].(map[string]interface{})["certificate"].(string)
-			tlsServerHostOverride, _ = mm["tls"].(map[string]interface{})["serverhostoverride"].(string)
-
-		} else {
-			mm1 := value.(map[interface{}]interface{})
-			host, _ = mm1["host"].(string)
-			port, _ = mm1["port"].(int)
-			primary, _ = mm1["primary"].(bool)
-			eventHost, _ = mm1["event_host"].(string)
-			eventPort, _ = mm1["event_port"].(int)
-			tlsCertificate, _ = mm1["tls"].(map[string]interface{})["certificate"].(string)
-			tlsServerHostOverride, _ = mm1["tls"].(map[string]interface{})["serverhostoverride"].(string)
-
-		}
-
-		p := PeerConfig{Host: host, Port: strconv.Itoa(port), EventHost: eventHost, EventPort: strconv.Itoa(eventPort),
-			TLSCertificate: tlsCertificate, TLSServerHostOverride: tlsServerHostOverride, Primary: primary}
+	err := myViper.UnmarshalKey("client.peers", &peersConfig)
+	if err != nil {
+		return nil, err
+	}
+	for index, p := range peersConfig {
 		if p.Host == "" {
-			panic(fmt.Sprintf("host key not exist or empty for %s", key))
+			return nil, fmt.Errorf("host key not exist or empty for peer %d", index)
 		}
-		if p.Port == "" {
-			panic(fmt.Sprintf("port key not exist or empty for %s", key))
+		if p.Port == 0 {
+			return nil, fmt.Errorf("port key not exist or empty for peer %d", index)
 		}
-
-		if IsTLSEnabled() && p.TLSCertificate == "" {
-			panic(fmt.Sprintf("tls.certificate not exist or empty for %s", key))
+		if IsTLSEnabled() && p.TLS.Certificate == "" {
+			return nil, fmt.Errorf("tls.certificate not exist or empty for peer %d", index)
 		}
-
-		p.TLSCertificate = strings.Replace(p.TLSCertificate, "$GOPATH", os.Getenv("GOPATH"), -1)
-		peersConfig = append(peersConfig, p)
+		peersConfig[index].TLS.Certificate = strings.Replace(p.TLS.Certificate, "$GOPATH",
+			os.Getenv("GOPATH"), -1)
 	}
-	return peersConfig
-
+	return peersConfig, nil
 }
 
 // IsTLSEnabled ...

config/config_test.go

@@ -28,19 +28,22 @@ import (
 )
 
 func TestGetPeersConfig(t *testing.T) {
-	pc := GetPeersConfig()
+	pc, err := GetPeersConfig()
+	if err != nil {
+		t.Fatalf(err.Error())
+	}
 
 	for _, value := range pc {
 		if value.Host == "" {
 			t.Fatalf("Host value is empty")
 		}
-		if value.Port == "" {
+		if value.Port == 0 {
 			t.Fatalf("Port value is empty")
 		}
-		if value.Port == "" {
+		if value.EventHost == "" {
 			t.Fatalf("EventHost value is empty")
 		}
-		if value.Port == "" {
+		if value.EventPort == 0 {
 			t.Fatalf("EventPort value is empty")
 		}
 
@@ -72,8 +75,8 @@ func TestMultipleVipers(t *testing.T) {
 		t.Fatalf("Expected testvalue after config initialization")
 	}
 	// Make sure Go SDK config is unaffected
-	testValue3 := myViper.GetString("client.peers.peer1.host")
-	if testValue3 != "localhost" {
+	testValue3 := myViper.GetBool("client.tls.enabled")
+	if testValue3 != true {
 		t.Fatalf("Expected existing config value to remain unchanged")
 	}
 }

fabric-client/chain.go

@@ -1318,17 +1318,10 @@ func (c *chain) fetchGenesisBlock() (*common.Block, error) {
 		return nil, fmt.Errorf("Error signing payload: %s", err)
 	}
 	// Request genesis block from ordering service
-	var block *common.Block
-	// TODO: what if the primary orderer is down?
-	responses, errors := c.GetOrderers()[0].SendDeliver(blockRequest)
-	// Block on channels for genesis block or error
-	select {
-	case block = <-responses:
-		logger.Debugf("Got genesis block from ordering service: %#v", block)
-	case err = <-errors:
-		return nil, fmt.Errorf("Error from SendDeliver(): %s", err)
+	block, err := c.SendEnvelope(blockRequest)
+	if err != nil {
+		return nil, fmt.Errorf("Error from SendEnvelope: %s", err.Error())
 	}
-
 	return block, nil
 }
 

fabric-client/helpers/chain.go

@@ -51,8 +51,13 @@ func GetChain(client fabricClient.Client, chainID string) (fabricClient.Chain, e
 	}
 	chain.AddOrderer(orderer)
 
-	for _, p := range config.GetPeersConfig() {
-		endorser, err := fabricClient.NewPeer(fmt.Sprintf("%s:%s", p.Host, p.Port), p.TLSCertificate, p.TLSServerHostOverride)
+	peerConfig, err := config.GetPeersConfig()
+	if err != nil {
+		return nil, fmt.Errorf("Error reading peer config: %v", err)
+	}
+	for _, p := range peerConfig {
+		endorser, err := fabricClient.NewPeer(fmt.Sprintf("%s:%d", p.Host, p.Port),
+			p.TLS.Certificate, p.TLS.ServerHostOverride)
 		if err != nil {
 			return nil, fmt.Errorf("NewPeer return error: %v", err)
 		}
@@ -164,7 +169,7 @@ func CreateAndJoinChannel(client fabricClient.Client, chain fabricClient.Chain,
 	// Wait for orderer to process channel metadata
 	time.Sleep(time.Second * 2)
 	// Test join channel
-	creator, err := getCreatorID(client)
+	creator, err := GetCreatorID(client)
 	if err != nil {
 		return fmt.Errorf("Could not generate creator ID: %v", err)
 	}

fabric-client/helpers/client.go

@@ -101,7 +101,7 @@ func GetClient(name string, pwd string, stateStorePath string) (fabricClient.Cli
 	if user == nil {
 		fabricCAClient, err1 := fabricCAClient.NewFabricCAClient()
 		if err1 != nil {
-			return nil, fmt.Errorf("NewFabricCAClient return error: %v", err)
+			return nil, fmt.Errorf("NewFabricCAClient return error: %v", err1)
 		}
 		key, cert, err1 := fabricCAClient.Enroll(name, pwd)
 		keyPem, _ := pem.Decode(key)
@@ -111,7 +111,7 @@ func GetClient(name string, pwd string, stateStorePath string) (fabricClient.Cli
 		user := fabricClient.NewUser(name)
 		k, err1 := client.GetCryptoSuite().KeyImport(keyPem.Bytes, &bccsp.ECDSAPrivateKeyImportOpts{Temporary: false})
 		if err1 != nil {
-			return nil, fmt.Errorf("KeyImport return error: %v", err)
+			return nil, fmt.Errorf("KeyImport return error: %v", err1)
 		}
 		user.SetPrivateKey(k)
 		user.SetEnrollmentCertificate(cert)
@@ -125,8 +125,8 @@ func GetClient(name string, pwd string, stateStorePath string) (fabricClient.Cli
 
 }
 
-// Utility method gets serialized enrollment certificate
-func getCreatorID(client fabricClient.Client) ([]byte, error) {
+// GetCreatorID gets serialized enrollment certificate
+func GetCreatorID(client fabricClient.Client) ([]byte, error) {
 
 	user, err := client.LoadUserFromStateStore("")
 	if err != nil {

test/fixtures/config/config_test.yaml

@@ -1,19 +1,20 @@
 client:
  peers:
-  peer1:
-    host: "localhost"
+  # peer0
+  - host: "localhost"
     port: 7051
-    event_host: "localhost"
-    event_port: 7053
+    eventHost: "localhost"
+    eventPort: 7053
     primary: true
     tls:
       # Certificate location absolute path
       certificate: "$GOPATH/src/github.com/hyperledger/fabric-sdk-go/test/fixtures/tls/peers/peer0/ca-cert.pem"
       serverHostOverride: "peer0"
-
-  peer2:
-    host: "localhost"
+  # peer 1
+  - host: "localhost"
     port: 7056
+    eventHost: "localhost"
+    eventPort: 7058
     primary: false
     tls:
       # Certificate location absolute path

test/integration/base_test_setup.go

@@ -217,10 +217,15 @@ func (setup *BaseSetupImpl) MoveFunds() (string, error) {
 func getEventHub() (events.EventHub, error) {
 	eventHub := events.NewEventHub()
 	foundEventHub := false
-	for _, p := range config.GetPeersConfig() {
-		if p.EventHost != "" && p.EventPort != "" {
-			fmt.Printf("******* EventHub connect to peer (%s:%s) *******\n", p.EventHost, p.EventPort)
-			eventHub.SetPeerAddr(fmt.Sprintf("%s:%s", p.EventHost, p.EventPort), p.TLSCertificate, p.TLSServerHostOverride)
+	peerConfig, err := config.GetPeersConfig()
+	if err != nil {
+		return nil, fmt.Errorf("Error reading peer config: %v", err)
+	}
+	for _, p := range peerConfig {
+		if p.EventHost != "" && p.EventPort != 0 {
+			fmt.Printf("******* EventHub connect to peer (%s:%d) *******\n", p.EventHost, p.EventPort)
+			eventHub.SetPeerAddr(fmt.Sprintf("%s:%d", p.EventHost, p.EventPort),
+				p.TLS.Certificate, p.TLS.ServerHostOverride)
 			foundEventHub = true
 			break
 		}