github.com/leonlxy/hyperledger@v1.0.0-alpha.0.20170427033203-34922035d248/peer/channel/join.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  	"errors"
    21  	"fmt"
    22  	"io/ioutil"
    23  
    24  	"github.com/hyperledger/fabric/core/scc/cscc"
    25  	"github.com/hyperledger/fabric/peer/common"
    26  	pcommon "github.com/hyperledger/fabric/protos/common"
    27  	pb "github.com/hyperledger/fabric/protos/peer"
    28  	putils "github.com/hyperledger/fabric/protos/utils"
    29  	"github.com/spf13/cobra"
    30  	"golang.org/x/net/context"
    31  )
    32  
    33  const commandDescription = "Joins the peer to a chain."
    34  
    35  func joinCmd(cf *ChannelCmdFactory) *cobra.Command {
    36  	// Set the flags on the channel start command.
    37  	return &cobra.Command{
    38  		Use:   "join",
    39  		Short: commandDescription,
    40  		Long:  commandDescription,
    41  		RunE: func(cmd *cobra.Command, args []string) error {
    42  			return join(cmd, args, cf)
    43  		},
    44  	}
    45  }
    46  
    47  //GBFileNotFoundErr genesis block file not found
    48  type GBFileNotFoundErr string
    49  
    50  func (e GBFileNotFoundErr) Error() string {
    51  	return fmt.Sprintf("genesis block file not found %s", string(e))
    52  }
    53  
    54  //ProposalFailedErr proposal failed
    55  type ProposalFailedErr string
    56  
    57  func (e ProposalFailedErr) Error() string {
    58  	return fmt.Sprintf("proposal failed (err: %s)", string(e))
    59  }
    60  
    61  func getJoinCCSpec() (*pb.ChaincodeSpec, error) {
    62  	if genesisBlockPath == common.UndefinedParamValue {
    63  		return nil, errors.New("Must supply genesis block file.")
    64  	}
    65  
    66  	gb, err := ioutil.ReadFile(genesisBlockPath)
    67  	if err != nil {
    68  		return nil, GBFileNotFoundErr(err.Error())
    69  	}
    70  
    71  	// Build the spec
    72  	input := &pb.ChaincodeInput{Args: [][]byte{[]byte(cscc.JoinChain), gb}}
    73  
    74  	spec := &pb.ChaincodeSpec{
    75  		Type:        pb.ChaincodeSpec_Type(pb.ChaincodeSpec_Type_value["GOLANG"]),
    76  		ChaincodeId: &pb.ChaincodeID{Name: "cscc"},
    77  		Input:       input,
    78  	}
    79  
    80  	return spec, nil
    81  }
    82  
    83  func executeJoin(cf *ChannelCmdFactory) (err error) {
    84  	spec, err := getJoinCCSpec()
    85  	if err != nil {
    86  		return err
    87  	}
    88  
    89  	// Build the ChaincodeInvocationSpec message
    90  	invocation := &pb.ChaincodeInvocationSpec{ChaincodeSpec: spec}
    91  
    92  	creator, err := cf.Signer.Serialize()
    93  	if err != nil {
    94  		return fmt.Errorf("Error serializing identity for %s: %s", cf.Signer.GetIdentifier(), err)
    95  	}
    96  
    97  	var prop *pb.Proposal
    98  	prop, _, err = putils.CreateProposalFromCIS(pcommon.HeaderType_CONFIG, "", invocation, creator)
    99  	if err != nil {
   100  		return fmt.Errorf("Error creating proposal for join %s", err)
   101  	}
   102  
   103  	var signedProp *pb.SignedProposal
   104  	signedProp, err = putils.GetSignedProposal(prop, cf.Signer)
   105  	if err != nil {
   106  		return fmt.Errorf("Error creating signed proposal %s", err)
   107  	}
   108  
   109  	var proposalResp *pb.ProposalResponse
   110  	proposalResp, err = cf.EndorserClient.ProcessProposal(context.Background(), signedProp)
   111  	if err != nil {
   112  		return ProposalFailedErr(err.Error())
   113  	}
   114  
   115  	if proposalResp == nil {
   116  		return ProposalFailedErr("nil proposal response")
   117  	}
   118  
   119  	if proposalResp.Response.Status != 0 && proposalResp.Response.Status != 200 {
   120  		return ProposalFailedErr(fmt.Sprintf("bad proposal response %d", proposalResp.Response.Status))
   121  	}
   122  
   123  	fmt.Println("Peer joined the channel!")
   124  
   125  	return nil
   126  }
   127  
   128  func join(cmd *cobra.Command, args []string, cf *ChannelCmdFactory) error {
   129  	var err error
   130  	if cf == nil {
   131  		cf, err = InitCmdFactory(true)
   132  		if err != nil {
   133  			return err
   134  		}
   135  	}
   136  	return executeJoin(cf)
   137  }