github.com/leonlxy/hyperledger@v1.0.0-alpha.0.20170427033203-34922035d248/peer/channel/fetchconfig.go (about) 1 /* 2 Copyright IBM Corp. 2017 All Rights Reserved. 3 4 Licensed under the Apache License, Version 2.0 (the "License"); 5 you may not use this file except in compliance with the License. 6 You may obtain a copy of the License at 7 8 http://www.apache.org/licenses/LICENSE-2.0 9 10 Unless required by applicable law or agreed to in writing, software 11 distributed under the License is distributed on an "AS IS" BASIS, 12 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 See the License for the specific language governing permissions and 14 limitations under the License. 15 */ 16 17 package channel 18 19 import ( 20 "io/ioutil" 21 22 "github.com/golang/protobuf/proto" 23 cb "github.com/hyperledger/fabric/protos/common" 24 "github.com/spf13/cobra" 25 ) 26 27 const fetchCmdDescription = "Fetch configuration block." 28 29 func fetchCmd(cf *ChannelCmdFactory) *cobra.Command { 30 createCmd := &cobra.Command{ 31 Use: "fetch", 32 Short: fetchCmdDescription, 33 Long: fetchCmdDescription, 34 RunE: func(cmd *cobra.Command, args []string) error { 35 return fetch(cmd, args, cf) 36 }, 37 } 38 39 return createCmd 40 } 41 42 func fetch(cmd *cobra.Command, args []string, cf *ChannelCmdFactory) error { 43 var err error 44 if cf == nil { 45 cf, err = InitCmdFactory(false) 46 if err != nil { 47 return err 48 } 49 } 50 51 var block *cb.Block 52 if block, err = cf.DeliverClient.getBlock(); err != nil { 53 return err 54 } 55 56 b, err := proto.Marshal(block) 57 if err != nil { 58 return err 59 } 60 61 file := chainID + ".block" 62 if err = ioutil.WriteFile(file, b, 0644); err != nil { 63 return err 64 } 65 66 return nil 67 }