[FAB-6033] Parse capabilities in channelconfig

This CR adds parsing for the new capabilities structure into the
channel, channel application, and channel orderer configs.  There are
currently no consumers of this code, to be added in a later changeset.

Change-Id: I3cd1f8e510c905f820d6e0bb7458d51917ca810a
Signed-off-by: Jason Yellick <jyellick@us.ibm.com>

common/channelconfig/api.go

@@ -38,6 +38,9 @@ type ApplicationOrg interface {
 type Application interface {
 	// Organizations returns a map of org ID to ApplicationOrg
 	Organizations() map[string]ApplicationOrg
+
+	// Capabilities defines the capabilities for the application portion of a channel
+	Capabilities() ApplicationCapabilities
 }
 
 // Channel gives read only access to the channel configuration
@@ -52,6 +55,9 @@ type Channel interface {
 
 	// OrdererAddresses returns the list of valid orderer addresses to connect to to invoke Broadcast/Deliver
 	OrdererAddresses() []string
+
+	// Capabilities defines the capabilities for a channel
+	Capabilities() ChannelCapabilities
 }
 
 // Consortiums represents the set of consortiums serviced by an ordering service
@@ -90,6 +96,27 @@ type Orderer interface {
 
 	// Organizations returns the organizations for the ordering service
 	Organizations() map[string]Org
+
+	// Capabilities defines the capabilities for the orderer portion of a channel
+	Capabilities() OrdererCapabilities
+}
+
+// ChannelCapabilities defines the capabilities for a channel
+type ChannelCapabilities interface {
+	// Supported returns an error if there are unknown capabilities in this channel which are required
+	Supported() error
+}
+
+// ApplicationCapabilities defines the capabilities for the application portion of a channel
+type ApplicationCapabilities interface {
+	// Supported returns an error if there are unknown capabilities in this channel which are required
+	Supported() error
+}
+
+// OrdererCapabilities defines the capabilities for the orderer portion of a channel
+type OrdererCapabilities interface {
+	// Supported returns an error if there are unknown capabilities in this channel which are required
+	Supported() error
 }
 
 // Resources is the common set of config resources for all channels

common/channelconfig/application.go

@@ -7,22 +7,37 @@ SPDX-License-Identifier: Apache-2.0
 package channelconfig
 
 import (
+	"github.com/hyperledger/fabric/common/capabilities"
 	cb "github.com/hyperledger/fabric/protos/common"
+
+	"github.com/pkg/errors"
 )
 
 const (
 	// ApplicationGroupKey is the group name for the Application config
 	ApplicationGroupKey = "Application"
 )
 
+// ApplicationProtos is used as the source of the ApplicationConfig
+type ApplicationProtos struct {
+	Capabilities *cb.Capabilities
+}
+
+// ApplicationConfig implements the Application interface
 type ApplicationConfig struct {
 	applicationOrgs map[string]ApplicationOrg
+	protos          *ApplicationProtos
 }
 
 // NewApplicationConfig creates config from an Application config group
 func NewApplicationConfig(appGroup *cb.ConfigGroup, mspConfig *MSPConfigHandler) (*ApplicationConfig, error) {
 	ac := &ApplicationConfig{
 		applicationOrgs: make(map[string]ApplicationOrg),
+		protos:          &ApplicationProtos{},
+	}
+
+	if err := DeserializeProtoValuesFromGroup(appGroup, ac.protos); err != nil {
+		return nil, errors.Wrap(err, "failed to deserialize values")
 	}
 
 	var err error
@@ -40,3 +55,8 @@ func NewApplicationConfig(appGroup *cb.ConfigGroup, mspConfig *MSPConfigHandler)
 func (ac *ApplicationConfig) Organizations() map[string]ApplicationOrg {
 	return ac.applicationOrgs
 }
+
+// Capabilities returns a map of capability name to Capability
+func (ac *ApplicationConfig) Capabilities() ApplicationCapabilities {
+	return capabilities.NewApplicationProvider(ac.protos.Capabilities.Capabilities)
+}

common/channelconfig/channel.go

@@ -11,6 +11,7 @@ import (
 	"math"
 
 	"github.com/hyperledger/fabric/bccsp"
+	"github.com/hyperledger/fabric/common/capabilities"
 	"github.com/hyperledger/fabric/common/util"
 	"github.com/hyperledger/fabric/msp"
 	cb "github.com/hyperledger/fabric/protos/common"
@@ -56,6 +57,7 @@ type ChannelProtos struct {
 	BlockDataHashingStructure *cb.BlockDataHashingStructure
 	OrdererAddresses          *cb.OrdererAddresses
 	Consortium                *cb.Consortium
+	Capabilities              *cb.Capabilities
 }
 
 // ChannelConfig stores the channel configuration
@@ -151,6 +153,11 @@ func (cc *ChannelConfig) ConsortiumName() string {
 	return cc.protos.Consortium.Name
 }
 
+// Capabilities returns information about the available capabilities for this channel
+func (cc *ChannelConfig) Capabilities() ChannelCapabilities {
+	return capabilities.NewChannelProvider(cc.protos.Capabilities.Capabilities)
+}
+
 // Validate inspects the generated configuration protos and ensures that the values are correct
 func (cc *ChannelConfig) Validate() error {
 	for _, validator := range []func() error{

common/channelconfig/orderer.go

@@ -13,6 +13,7 @@ import (
 	"strings"
 	"time"
 
+	"github.com/hyperledger/fabric/common/capabilities"
 	cb "github.com/hyperledger/fabric/protos/common"
 	ab "github.com/hyperledger/fabric/protos/orderer"
 
@@ -48,6 +49,7 @@ type OrdererProtos struct {
 	BatchTimeout        *ab.BatchTimeout
 	KafkaBrokers        *ab.KafkaBrokers
 	ChannelRestrictions *ab.ChannelRestrictions
+	Capabilities        *cb.Capabilities
 }
 
 // OrdererConfig holds the orderer configuration information
@@ -114,6 +116,11 @@ func (oc *OrdererConfig) Organizations() map[string]Org {
 	return oc.orgs
 }
 
+// Capabilities returns the capabilities the ordering network has for this channel
+func (oc *OrdererConfig) Capabilities() OrdererCapabilities {
+	return capabilities.NewOrdererProvider(oc.protos.Capabilities.Capabilities)
+}
+
 func (oc *OrdererConfig) Validate() error {
 	for _, validator := range []func() error{
 		oc.validateBatchSize,

common/mocks/config/channel.go

@@ -16,7 +16,10 @@ limitations under the License.
 
 package config
 
-import "github.com/hyperledger/fabric/common/util"
+import (
+	"github.com/hyperledger/fabric/common/channelconfig"
+	"github.com/hyperledger/fabric/common/util"
+)
 
 func nearIdentityHash(input []byte) []byte {
 	return util.ConcatenateBytes([]byte("FakeHash("), input, []byte(""))
@@ -30,6 +33,8 @@ type Channel struct {
 	BlockDataHashingStructureWidthVal uint32
 	// OrdererAddressesVal is returned as the result of OrdererAddresses()
 	OrdererAddressesVal []string
+	// CapabilitiesVal is returned as the result of Capabilities()
+	CapabilitiesVal channelconfig.ChannelCapabilities
 }
 
 // HashingAlgorithm returns the HashingAlgorithmVal if set, otherwise a fake simple hash function
@@ -49,3 +54,8 @@ func (scm *Channel) BlockDataHashingStructureWidth() uint32 {
 func (scm *Channel) OrdererAddresses() []string {
 	return scm.OrdererAddressesVal
 }
+
+// Capabilities returns CapabilitiesVal
+func (scm *Channel) Capabilities() channelconfig.ChannelCapabilities {
+	return scm.CapabilitiesVal
+}

common/mocks/config/orderer.go

@@ -27,6 +27,8 @@ type Orderer struct {
 	MaxChannelsCountVal uint64
 	// OrganizationsVal is returned as the result of Organizations()
 	OrganizationsVal map[string]channelconfig.Org
+	// CapabilitiesVal is returned as the result of Capabilities()
+	CapabilitiesVal channelconfig.OrdererCapabilities
 }
 
 // ConsensusType returns the ConsensusTypeVal
@@ -58,3 +60,8 @@ func (scm *Orderer) MaxChannelsCount() uint64 {
 func (scm *Orderer) Organizations() map[string]channelconfig.Org {
 	return scm.OrganizationsVal
 }
+
+// Capabilities returns CapabilitiesVal
+func (scm *Orderer) Capabilities() channelconfig.OrdererCapabilities {
+	return scm.CapabilitiesVal
+}