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resource.go
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resource.go
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/*
Copyright SecureKey Technologies Inc. All Rights Reserved.
SPDX-License-Identifier: Apache-2.0
*/
// Package resource provides access to fabric network resource management, typically using system channel queries.
package resource
import (
reqContext "context"
"net/http"
"sync"
"github.com/golang/protobuf/proto"
"github.com/pkg/errors"
"github.com/hyperledger/fabric-protos-go/common"
pb "github.com/hyperledger/fabric-protos-go/peer"
"github.com/huijinchain/fabric-sdk-go/pkg/common/errors/multi"
"github.com/huijinchain/fabric-sdk-go/pkg/common/errors/retry"
"github.com/huijinchain/fabric-sdk-go/pkg/common/logging"
"github.com/huijinchain/fabric-sdk-go/pkg/common/providers/context"
"github.com/huijinchain/fabric-sdk-go/pkg/common/providers/fab"
"github.com/huijinchain/fabric-sdk-go/pkg/common/providers/msp"
contextImpl "github.com/huijinchain/fabric-sdk-go/pkg/context"
ccomm "github.com/huijinchain/fabric-sdk-go/pkg/core/config/comm"
"github.com/huijinchain/fabric-sdk-go/pkg/fab/txn"
)
var logger = logging.NewLogger("fabsdk/fab")
type fabCtx struct {
context.Providers
msp.SigningIdentity
}
type options struct {
retry retry.Opts
}
// Opt is a resource option
type Opt func(opts *options)
// WithRetry supplies retry options
func WithRetry(retry retry.Opts) Opt {
return func(options *options) {
options.retry = retry
}
}
// SignChannelConfig signs a configuration.
func SignChannelConfig(ctx context.Client, config []byte, signer msp.SigningIdentity) (*common.ConfigSignature, error) {
logger.Debug("SignChannelConfig - start")
if config == nil {
return nil, errors.New("channel configuration required")
}
signingUser := signer
// If signing user is not provided default to client's user context
if signingUser == nil {
signingUser = ctx
}
if signingUser == nil {
return nil, errors.New("user context required")
}
sigCtx := fabCtx{
Providers: ctx,
SigningIdentity: signingUser,
}
return CreateConfigSignature(sigCtx, config)
}
// CreateChannel calls the orderer to start building the new channel.
func CreateChannel(reqCtx reqContext.Context, request CreateChannelRequest, opts ...Opt) (fab.TransactionID, error) {
if request.Orderer == nil {
return fab.EmptyTransactionID, errors.New("missing orderer request parameter for the initialize channel")
}
if request.Name == "" {
return fab.EmptyTransactionID, errors.New("missing name request parameter for the new channel")
}
if request.Envelope != nil {
return createChannelFromEnvelope(reqCtx, request)
}
if request.Config == nil {
return fab.EmptyTransactionID, errors.New("missing envelope request parameter containing the configuration of the new channel")
}
if request.Signatures == nil {
return fab.EmptyTransactionID, errors.New("missing signatures request parameter for the new channel")
}
ctx, ok := contextImpl.RequestClientContext(reqCtx)
if !ok {
return fab.EmptyTransactionID, errors.New("creation of transaction header failed, failed to extract client context from reqContext")
}
txh, err := txn.NewHeader(ctx, request.Name)
if err != nil {
return fab.EmptyTransactionID, errors.WithMessage(err, "creation of transaction header failed")
}
optionsValue := getOpts(opts...)
_, err = retry.NewInvoker(retry.New(optionsValue.retry)).Invoke(
func() (interface{}, error) {
return nil, createOrUpdateChannel(reqCtx, txh, request)
},
)
return txh.TransactionID(), err
}
// TODO: this function was extracted from createOrUpdateChannel, but needs a closer examination.
func createChannelFromEnvelope(reqCtx reqContext.Context, request CreateChannelRequest) (fab.TransactionID, error) {
env, err := extractSignedEnvelope(request.Envelope)
if err != nil {
return fab.EmptyTransactionID, errors.WithMessage(err, "signed envelope not valid")
}
// Send request
_, err = request.Orderer.SendBroadcast(reqCtx, env)
if err != nil {
return fab.EmptyTransactionID, errors.WithMessage(err, "failed broadcast to orderer")
}
return fab.EmptyTransactionID, nil
}
// GenesisBlockFromOrderer returns the genesis block from the defined orderer that may be
// used in a join request
func GenesisBlockFromOrderer(reqCtx reqContext.Context, channelName string, orderer fab.Orderer, opts ...Opt) (*common.Block, error) {
optionsValue := getOpts(opts...)
return retrieveBlock(reqCtx, []fab.Orderer{orderer}, channelName, newSpecificSeekPosition(0), optionsValue)
}
// LastConfigFromOrderer fetches the current configuration block for the specified channel
// from the given orderer
func LastConfigFromOrderer(reqCtx reqContext.Context, channelName string, orderer fab.Orderer, opts ...Opt) (*common.Block, error) {
logger.Debugf("channelConfig - start for channel %s", channelName)
optionsValue := getOpts(opts...)
// Get the newest block
block, err := retrieveBlock(reqCtx, []fab.Orderer{orderer}, channelName, newNewestSeekPosition(), optionsValue)
if err != nil {
return nil, err
}
logger.Debugf("channelConfig - Retrieved newest block number: %d\n", block.Header.Number)
// Get the index of the last config block
lastConfig, err := GetLastConfigFromBlock(block)
if err != nil {
return nil, errors.Wrap(err, "GetLastConfigFromBlock failed")
}
logger.Debugf("channelConfig - Last config index: %d\n", lastConfig.Index)
// Get the last config block
block, err = retrieveBlock(reqCtx, []fab.Orderer{orderer}, channelName, newSpecificSeekPosition(lastConfig.Index), optionsValue)
if err != nil {
return nil, errors.WithMessage(err, "retrieve block failed")
}
logger.Debugf("channelConfig - Last config block number %d, Number of tx: %d", block.Header.Number, len(block.Data.Data))
if len(block.Data.Data) != 1 {
return nil, errors.New("apiconfig block must contain one transaction")
}
return block, nil
}
// JoinChannel sends a join channel proposal to the target peer.
//
// TODO extract targets from request into parameter.
func JoinChannel(reqCtx reqContext.Context, request JoinChannelRequest, targets []fab.ProposalProcessor, opts ...Opt) error {
if request.GenesisBlock == nil {
return errors.New("missing block input parameter with the required genesis block")
}
optionsValue := getOpts(opts...)
cir, err := createJoinChannelInvokeRequest(request.GenesisBlock)
if err != nil {
return errors.WithMessage(err, "creation of join channel invoke request failed")
}
var errors1 multi.Errors
var mutex sync.Mutex
var wg sync.WaitGroup
wg.Add(len(targets))
for _, t := range targets {
target := t
go func() {
defer wg.Done()
if _, err := queryChaincodeWithTarget(reqCtx, cir, target, optionsValue); err != nil {
mutex.Lock()
errors1 = append(errors1, err)
mutex.Unlock()
}
}()
}
wg.Wait()
return errors1.ToError()
}
func extractSignedEnvelope(reqEnvelope []byte) (*fab.SignedEnvelope, error) {
envelope := &common.Envelope{}
err := proto.Unmarshal(reqEnvelope, envelope)
if err != nil {
return nil, errors.Wrap(err, "unmarshal request envelope failed")
}
se := fab.SignedEnvelope{
Signature: envelope.Signature,
Payload: envelope.Payload,
}
return &se, nil
}
// createOrUpdateChannel creates a new channel or updates an existing channel.
func createOrUpdateChannel(reqCtx reqContext.Context, txh *txn.TransactionHeader, request CreateChannelRequest) error {
configUpdateEnvelope := &common.ConfigUpdateEnvelope{
ConfigUpdate: request.Config,
Signatures: request.Signatures,
}
configUpdateEnvelopeBytes, err := proto.Marshal(configUpdateEnvelope)
if err != nil {
return errors.Wrap(err, "marshal configUpdateEnvelope failed")
}
ctx, ok := contextImpl.RequestClientContext(reqCtx)
if !ok {
return errors.New("failed get client context from reqContext for Creating ChannelHeader")
}
hash, err := ccomm.TLSCertHash(ctx.EndpointConfig())
if err != nil {
return errors.WithMessage(err, "failed to get tls cert hash")
}
channelHeaderOpts := txn.ChannelHeaderOpts{
TxnHeader: txh,
TLSCertHash: hash,
}
channelHeader, err := txn.CreateChannelHeader(common.HeaderType_CONFIG_UPDATE, channelHeaderOpts)
if err != nil {
return errors.WithMessage(err, "CreateChannelHeader failed")
}
payload, err := txn.CreatePayload(txh, channelHeader, configUpdateEnvelopeBytes)
if err != nil {
return errors.WithMessage(err, "CreatePayload failed")
}
_, err = txn.BroadcastPayload(reqCtx, payload, []fab.Orderer{request.Orderer})
if err != nil {
return errors.WithMessage(err, "SendEnvelope failed")
}
return nil
}
// QueryChannels queries the names of all the channels that a peer has joined.
func QueryChannels(reqCtx reqContext.Context, peer fab.ProposalProcessor, opts ...Opt) (*pb.ChannelQueryResponse, error) {
if peer == nil {
return nil, errors.New("peer required")
}
optionsValue := getOpts(opts...)
cir := createChannelsInvokeRequest()
payload, err := queryChaincodeWithTarget(reqCtx, cir, peer, optionsValue)
if err != nil {
return nil, errors.WithMessage(err, "cscc.GetChannels failed")
}
response := new(pb.ChannelQueryResponse)
err = proto.Unmarshal(payload, response)
if err != nil {
return nil, errors.Wrap(err, "unmarshal ChannelQueryResponse failed")
}
return response, nil
}
// QueryInstalledChaincodes queries the installed chaincodes on a peer.
// Returns the details of all chaincodes installed on a peer.
func QueryInstalledChaincodes(reqCtx reqContext.Context, peer fab.ProposalProcessor, opts ...Opt) (*pb.ChaincodeQueryResponse, error) {
if peer == nil {
return nil, errors.New("peer required")
}
optionsValue := getOpts(opts...)
cir := createInstalledChaincodesInvokeRequest()
payload, err := queryChaincodeWithTarget(reqCtx, cir, peer, optionsValue)
if err != nil {
return nil, errors.WithMessage(err, "lscc.getinstalledchaincodes failed")
}
response := new(pb.ChaincodeQueryResponse)
err = proto.Unmarshal(payload, response)
if err != nil {
return nil, errors.Wrap(err, "unmarshal ChaincodeQueryResponse failed")
}
return response, nil
}
// InstallChaincode sends an install proposal to one or more endorsing peers.
func InstallChaincode(reqCtx reqContext.Context, req InstallChaincodeRequest, targets []fab.ProposalProcessor, opts ...Opt) ([]*fab.TransactionProposalResponse, fab.TransactionID, error) {
if req.Name == "" {
return nil, fab.EmptyTransactionID, errors.New("chaincode name required")
}
if req.Path == "" {
return nil, fab.EmptyTransactionID, errors.New("chaincode path required")
}
if req.Version == "" {
return nil, fab.EmptyTransactionID, errors.New("chaincode version required")
}
if req.Package == nil {
return nil, fab.EmptyTransactionID, errors.New("chaincode package is required")
}
propReq := ChaincodeInstallRequest{
Name: req.Name,
Path: req.Path,
Version: req.Version,
Package: &ChaincodePackage{
Type: req.Package.Type,
Code: req.Package.Code,
},
}
ctx, ok := contextImpl.RequestClientContext(reqCtx)
if !ok {
return nil, fab.EmptyTransactionID, errors.New("failed get client context from reqContext for txn header")
}
txh, err := txn.NewHeader(ctx, fab.SystemChannel)
if err != nil {
return nil, fab.EmptyTransactionID, errors.WithMessage(err, "create transaction ID failed")
}
prop, err := CreateChaincodeInstallProposal(txh, propReq)
if err != nil {
return nil, fab.EmptyTransactionID, errors.WithMessage(err, "creation of install chaincode proposal failed")
}
optionsValue := getOpts(opts...)
resp, err := retry.NewInvoker(retry.New(optionsValue.retry)).Invoke(
func() (interface{}, error) {
return txn.SendProposal(reqCtx, prop, targets)
},
)
if err != nil {
return nil, fab.EmptyTransactionID, err
}
return resp.([]*fab.TransactionProposalResponse), prop.TxnID, nil
}
func queryChaincodeWithTarget(reqCtx reqContext.Context, request fab.ChaincodeInvokeRequest, target fab.ProposalProcessor, opts options) ([]byte, error) {
targets := []fab.ProposalProcessor{target}
ctx, ok := contextImpl.RequestClientContext(reqCtx)
if !ok {
return nil, errors.New("failed get client context from reqContext for txn header")
}
txh, err := txn.NewHeader(ctx, fab.SystemChannel)
if err != nil {
return nil, errors.WithMessage(err, "create transaction ID failed")
}
tp, err := txn.CreateChaincodeInvokeProposal(txh, request)
if err != nil {
return nil, errors.WithMessage(err, "NewProposal failed")
}
resp, err := retry.NewInvoker(retry.New(opts.retry)).Invoke(
func() (interface{}, error) {
return txn.SendProposal(reqCtx, tp, targets)
},
)
if err != nil {
return nil, errors.WithMessage(err, "SendProposal failed")
}
tpr := resp.([]*fab.TransactionProposalResponse)
err = validateResponse(tpr[0])
if err != nil {
return nil, errors.WithMessage(err, "transaction proposal failed")
}
return tpr[0].ProposalResponse.GetResponse().Payload, nil
}
func validateResponse(response *fab.TransactionProposalResponse) error {
if response.Status != http.StatusOK {
return errors.Errorf("bad status from %s (%d)", response.Endorser, response.Status)
}
return nil
}
func getOpts(opts ...Opt) options {
var optionsValue options
for _, opt := range opts {
opt(&optionsValue)
}
return optionsValue
}
// ExtractConfigFromBlock extracts channel configuration from block
func ExtractConfigFromBlock(block *common.Block) (*common.Config, error) {
if block == nil || block.Data == nil || len(block.Data.Data) == 0 {
return nil, errors.New("invalid block")
}
blockPayload := block.Data.Data[0]
envelope := &common.Envelope{}
if err := proto.Unmarshal(blockPayload, envelope); err != nil {
return nil, err
}
payload := &common.Payload{}
if err := proto.Unmarshal(envelope.Payload, payload); err != nil {
return nil, err
}
cfgEnv := &common.ConfigEnvelope{}
if err := proto.Unmarshal(payload.Data, cfgEnv); err != nil {
return nil, err
}
return cfgEnv.Config, nil
}