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capabilities.go
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/
capabilities.go
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/*
Copyright IBM Corp. All Rights Reserved.
SPDX-License-Identifier: Apache-2.0
*/
package configtx
import (
"errors"
"fmt"
"github.com/golang/protobuf/proto"
cb "github.com/fabric-creed/fabric-protos-go/common"
)
// capabilitiesValue returns the config definition for a set of capabilities.
// It is a value for the /Channel/Orderer, Channel/Application/, and /Channel groups.
func capabilitiesValue(capabilities []string) *standardConfigValue {
c := &cb.Capabilities{
Capabilities: make(map[string]*cb.Capability),
}
for _, capability := range capabilities {
c.Capabilities[capability] = &cb.Capability{}
}
return &standardConfigValue{
key: CapabilitiesKey,
value: c,
}
}
func addCapability(configGroup *cb.ConfigGroup, capabilities []string, modPolicy string, capability string) error {
for _, c := range capabilities {
if c == capability {
// if capability already exist, do nothing.
return nil
}
}
capabilities = append(capabilities, capability)
err := setValue(configGroup, capabilitiesValue(capabilities), modPolicy)
if err != nil {
return fmt.Errorf("adding capability: %v", err)
}
return nil
}
func removeCapability(configGroup *cb.ConfigGroup, capabilities []string, modPolicy string, capability string) error {
var updatedCapabilities []string
for _, c := range capabilities {
if c != capability {
updatedCapabilities = append(updatedCapabilities, c)
}
}
if len(updatedCapabilities) == len(capabilities) {
return errors.New("capability not set")
}
err := setValue(configGroup, capabilitiesValue(updatedCapabilities), modPolicy)
if err != nil {
return fmt.Errorf("removing capability: %v", err)
}
return nil
}
func getCapabilities(configGroup *cb.ConfigGroup) ([]string, error) {
capabilitiesValue, ok := configGroup.Values[CapabilitiesKey]
if !ok {
// no capabilities defined/enabled
return nil, nil
}
capabilitiesProto := &cb.Capabilities{}
err := proto.Unmarshal(capabilitiesValue.Value, capabilitiesProto)
if err != nil {
return nil, fmt.Errorf("unmarshaling capabilities: %v", err)
}
capabilities := []string{}
for capability := range capabilitiesProto.Capabilities {
capabilities = append(capabilities, capability)
}
return capabilities, nil
}