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channel.go
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channel.go
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/*
Copyright IBM Corp. All Rights Reserved.
SPDX-License-Identifier: Apache-2.0
*/
package channel
import (
"strings"
"time"
"github.com/hyperledger/fabric/common/flogging"
"github.com/hyperledger/fabric/msp"
"github.com/hyperledger/fabric/peer/common"
cb "github.com/hyperledger/fabric/protos/common"
pb "github.com/hyperledger/fabric/protos/peer"
"github.com/pkg/errors"
"github.com/spf13/cobra"
"github.com/spf13/pflag"
)
var logger = flogging.MustGetLogger("channelCmd")
const (
EndorserRequired bool = true
EndorserNotRequired bool = false
OrdererRequired bool = true
OrdererNotRequired bool = false
PeerDeliverRequired bool = true
PeerDeliverNotRequired bool = false
)
var (
// join related variables.
genesisBlockPath string
// create related variables
channelID string
channelTxFile string
outputBlock string
timeout time.Duration
)
// Cmd returns the cobra command for Node
func Cmd(cf *ChannelCmdFactory) *cobra.Command {
AddFlags(channelCmd)
channelCmd.AddCommand(createCmd(cf))
channelCmd.AddCommand(fetchCmd(cf))
channelCmd.AddCommand(joinCmd(cf))
channelCmd.AddCommand(listCmd(cf))
channelCmd.AddCommand(updateCmd(cf))
channelCmd.AddCommand(signconfigtxCmd(cf))
channelCmd.AddCommand(getinfoCmd(cf))
return channelCmd
}
// AddFlags adds flags for create and join
func AddFlags(cmd *cobra.Command) {
common.AddOrdererFlags(cmd)
}
var flags *pflag.FlagSet
func init() {
resetFlags()
}
// Explicitly define a method to facilitate tests
func resetFlags() {
flags = &pflag.FlagSet{}
flags.StringVarP(&genesisBlockPath, "blockpath", "b", common.UndefinedParamValue, "Path to file containing genesis block")
flags.StringVarP(&channelID, "channelID", "c", common.UndefinedParamValue, "In case of a newChain command, the channel ID to create. It must be all lower case, less than 250 characters long and match the regular expression: [a-z][a-z0-9.-]*")
flags.StringVarP(&channelTxFile, "file", "f", "", "Configuration transaction file generated by a tool such as configtxgen for submitting to orderer")
flags.StringVarP(&outputBlock, "outputBlock", "", common.UndefinedParamValue, `The path to write the genesis block for the channel. (default ./<channelID>.block)`)
flags.DurationVarP(&timeout, "timeout", "t", 5*time.Second, "Channel creation timeout")
}
func attachFlags(cmd *cobra.Command, names []string) {
cmdFlags := cmd.Flags()
for _, name := range names {
if flag := flags.Lookup(name); flag != nil {
cmdFlags.AddFlag(flag)
} else {
logger.Fatalf("Could not find flag '%s' to attach to commond '%s'", name, cmd.Name())
}
}
}
var channelCmd = &cobra.Command{
Use: "channel",
Short: "Operate a channel: create|fetch|join|list|update|signconfigtx|getinfo.",
Long: "Operate a channel: create|fetch|join|list|update|signconfigtx|getinfo.",
PersistentPreRun: func(cmd *cobra.Command, args []string) {
common.InitCmd(cmd, args)
common.SetOrdererEnv(cmd, args)
},
}
type BroadcastClientFactory func() (common.BroadcastClient, error)
type deliverClientIntf interface {
GetSpecifiedBlock(num uint64) (*cb.Block, error)
GetOldestBlock() (*cb.Block, error)
GetNewestBlock() (*cb.Block, error)
Close() error
}
// ChannelCmdFactory holds the clients used by ChannelCmdFactory
type ChannelCmdFactory struct {
EndorserClient pb.EndorserClient
Signer msp.SigningIdentity
BroadcastClient common.BroadcastClient
DeliverClient deliverClientIntf
BroadcastFactory BroadcastClientFactory
}
// InitCmdFactory init the ChannelCmdFactory with clients to endorser and orderer according to params
func InitCmdFactory(isEndorserRequired, isPeerDeliverRequired, isOrdererRequired bool) (*ChannelCmdFactory, error) {
if isPeerDeliverRequired && isOrdererRequired {
// this is likely a bug during development caused by adding a new cmd
return nil, errors.New("ERROR - only a single deliver source is currently supported")
}
var err error
cf := &ChannelCmdFactory{}
cf.Signer, err = common.GetDefaultSignerFnc()
if err != nil {
return nil, errors.WithMessage(err, "error getting default signer")
}
cf.BroadcastFactory = func() (common.BroadcastClient, error) {
return common.GetBroadcastClientFnc()
}
// for join and list, we need the endorser as well
if isEndorserRequired {
// creating an EndorserClient with these empty parameters will create a
// connection using the values of "peer.address" and
// "peer.tls.rootcert.file"
cf.EndorserClient, err = common.GetEndorserClientFnc(common.UndefinedParamValue, common.UndefinedParamValue)
if err != nil {
return nil, errors.WithMessage(err, "error getting endorser client for channel")
}
}
// for fetching blocks from a peer
if isPeerDeliverRequired {
cf.DeliverClient, err = common.NewDeliverClientForPeer(channelID)
if err != nil {
return nil, errors.WithMessage(err, "error getting deliver client for channel")
}
}
// for create and fetch, we need the orderer as well
if isOrdererRequired {
if len(strings.Split(common.OrderingEndpoint, ":")) != 2 {
return nil, errors.Errorf("ordering service endpoint %s is not valid or missing", common.OrderingEndpoint)
}
cf.DeliverClient, err = common.NewDeliverClientForOrderer(channelID)
if err != nil {
return nil, err
}
}
logger.Infof("Endorser and orderer connections initialized")
return cf, nil
}