/
channel.go
128 lines (121 loc) · 3.9 KB
/
channel.go
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package client
import (
"bytes"
"context"
"fmt"
"strconv"
"github.com/gogo/protobuf/proto"
"github.com/hyperledger/fabric/common/tools/protolator"
"github.com/hyperledger/fabric/core/scc/cscc"
"github.com/hyperledger/fabric/core/scc/qscc"
peercom "github.com/hyperledger/fabric/peer/common"
protocom "github.com/hyperledger/fabric/protos/common"
pb "github.com/hyperledger/fabric/protos/peer"
"github.com/hyperledger/fabric/protos/utils"
)
func ListChannels(chainClient *ChainClient) ([]*pb.ChannelInfo, error) {
invocation := &pb.ChaincodeInvocationSpec{
ChaincodeSpec: &pb.ChaincodeSpec{
Type: pb.ChaincodeSpec_Type(pb.ChaincodeSpec_Type_value["GOLANG"]),
ChaincodeId: &pb.ChaincodeID{Name: "cscc"},
Input: &pb.ChaincodeInput{Args: [][]byte{[]byte(cscc.GetChannels)}},
},
}
c, _ := chainClient.Signer.Serialize()
prop, _, err := utils.CreateProposalFromCIS(protocom.HeaderType_ENDORSER_TRANSACTION, "", invocation, c)
if err != nil {
return nil, err
}
//fmt.Println(prop)
signedProp, err := utils.GetSignedProposal(prop, chainClient.Signer)
if err != nil {
return nil, err
}
//fmt.Println(signedProp)
proposalResp, err := chainClient.EndorserClient.ProcessProposal(context.Background(), signedProp)
if err != nil {
return nil, err
}
//fmt.Println(proposalResp)
if proposalResp.Response == nil || proposalResp.Response.Status != 200 {
return nil, fmt.Errorf("Received bad response, status %d: %s", proposalResp.Response.Status, proposalResp.Response.Message)
}
var channelQueryResponse pb.ChannelQueryResponse
err = proto.Unmarshal(proposalResp.Response.Payload, &channelQueryResponse)
if err != nil {
return nil, err
}
return channelQueryResponse.Channels, nil
}
func GetChannelInfo(chainClient *ChainClient, channelID string) (*protocom.BlockchainInfo, error) {
invocation := &pb.ChaincodeInvocationSpec{
ChaincodeSpec: &pb.ChaincodeSpec{
Type: pb.ChaincodeSpec_Type(pb.ChaincodeSpec_Type_value["GOLANG"]),
ChaincodeId: &pb.ChaincodeID{Name: "qscc"},
Input: &pb.ChaincodeInput{Args: [][]byte{[]byte(qscc.GetChainInfo), []byte(channelID)}},
},
}
c, _ := chainClient.Signer.Serialize()
prop, _, err := utils.CreateProposalFromCIS(protocom.HeaderType_ENDORSER_TRANSACTION, "", invocation, c)
if err != nil {
return nil, err
}
//fmt.Println(prop)
signedProp, err := utils.GetSignedProposal(prop, chainClient.Signer)
if err != nil {
return nil, err
}
//fmt.Println(signedProp)
proposalResp, err := chainClient.EndorserClient.ProcessProposal(context.Background(), signedProp)
if err != nil {
return nil, err
}
if proposalResp.Response == nil || proposalResp.Response.Status != 200 {
return nil, fmt.Errorf("received bad response, status %d: %s \n", proposalResp.Response.Status, proposalResp.Response.Message)
}
blockChainInfo := &protocom.BlockchainInfo{}
err = proto.Unmarshal(proposalResp.Response.Payload, blockChainInfo)
if err != nil {
return nil, err
}
return blockChainInfo, nil
}
func FetchBlock(chainClient *ChainClient, channelID, blockIndex string) (string, error) {
deliverClient, err := peercom.NewDeliverClientForPeer(channelID)
if err != nil {
return "", err
}
var block *protocom.Block
switch blockIndex {
case "oldest":
block, err = deliverClient.GetOldestBlock()
case "newest":
block, err = deliverClient.GetNewestBlock()
case "config":
iBlock, err := deliverClient.GetNewestBlock()
if err != nil {
return "", err
}
lc, err := utils.GetLastConfigIndexFromBlock(iBlock)
if err != nil {
return "", err
}
block, err = deliverClient.GetSpecifiedBlock(lc)
default:
num, err := strconv.Atoi(blockIndex)
if err != nil {
return "", err
}
block, err = deliverClient.GetSpecifiedBlock(uint64(num))
}
if err != nil {
return "", err
}
bs := make([]byte, 0, 10*1024)
buf := bytes.NewBuffer(bs)
err = protolator.DeepMarshalJSON(buf, block)
if err != nil {
return "", err
}
return buf.String(), nil
}