github.com/true-sqn/fabric@v2.1.1+incompatible/core/cclifecycle/util.go (about)

     1  /*
     2  Copyright IBM Corp. All Rights Reserved.
     3  
     4  SPDX-License-Identifier: Apache-2.0
     5  */
     6  
     7  package cclifecycle
     8  
     9  import (
    10  	"github.com/golang/protobuf/proto"
    11  	"github.com/hyperledger/fabric/common/chaincode"
    12  	"github.com/hyperledger/fabric/core/common/ccprovider"
    13  	"github.com/hyperledger/fabric/core/common/privdata"
    14  	"github.com/pkg/errors"
    15  )
    16  
    17  var (
    18  	// AcceptAll returns a predicate that accepts all Metadata
    19  	AcceptAll ChaincodePredicate = func(cc chaincode.Metadata) bool {
    20  		return true
    21  	}
    22  )
    23  
    24  // ChaincodePredicate accepts or rejects chaincode based on its metadata
    25  type ChaincodePredicate func(cc chaincode.Metadata) bool
    26  
    27  // DeployedChaincodes retrieves the metadata of the given deployed chaincodes
    28  func DeployedChaincodes(q Query, filter ChaincodePredicate, loadCollections bool, chaincodes ...string) (chaincode.MetadataSet, error) {
    29  	defer q.Done()
    30  
    31  	var res chaincode.MetadataSet
    32  	for _, cc := range chaincodes {
    33  		data, err := q.GetState("lscc", cc)
    34  		if err != nil {
    35  			Logger.Error("Failed querying lscc namespace:", err)
    36  			return nil, errors.WithStack(err)
    37  		}
    38  		if len(data) == 0 {
    39  			Logger.Info("Chaincode", cc, "isn't instantiated")
    40  			continue
    41  		}
    42  		ccInfo, err := extractCCInfo(data)
    43  		if err != nil {
    44  			Logger.Error("Failed extracting chaincode info about", cc, "from LSCC returned payload. Error:", err)
    45  			continue
    46  		}
    47  		if ccInfo.Name != cc {
    48  			Logger.Error("Chaincode", cc, "is listed in LSCC as", ccInfo.Name)
    49  			continue
    50  		}
    51  
    52  		instCC := chaincode.Metadata{
    53  			Name:    ccInfo.Name,
    54  			Version: ccInfo.Version,
    55  			Id:      ccInfo.Id,
    56  			Policy:  ccInfo.Policy,
    57  		}
    58  
    59  		if !filter(instCC) {
    60  			Logger.Debug("Filtered out", instCC)
    61  			continue
    62  		}
    63  
    64  		if loadCollections {
    65  			key := privdata.BuildCollectionKVSKey(cc)
    66  			collectionData, err := q.GetState("lscc", key)
    67  			if err != nil {
    68  				Logger.Errorf("Failed querying lscc namespace for %s: %v", key, err)
    69  				return nil, errors.WithStack(err)
    70  			}
    71  			ccp, err := privdata.ParseCollectionConfig(collectionData)
    72  			if err != nil {
    73  				Logger.Errorf("failed to parse collection config, error %s", err.Error())
    74  				return nil, errors.Wrapf(err, "failed to parse collection config")
    75  			}
    76  			instCC.CollectionsConfig = ccp
    77  			Logger.Debug("Retrieved collection config for", cc, "from", key)
    78  		}
    79  
    80  		res = append(res, instCC)
    81  	}
    82  	Logger.Debug("Returning", res)
    83  	return res, nil
    84  }
    85  
    86  func deployedCCToNameVersion(cc chaincode.Metadata) nameVersion {
    87  	return nameVersion{
    88  		name:    cc.Name,
    89  		version: cc.Version,
    90  	}
    91  }
    92  
    93  func extractCCInfo(data []byte) (*ccprovider.ChaincodeData, error) {
    94  	cd := &ccprovider.ChaincodeData{}
    95  	if err := proto.Unmarshal(data, cd); err != nil {
    96  		return nil, errors.Wrap(err, "failed unmarshaling lscc read value into ChaincodeData")
    97  	}
    98  	return cd, nil
    99  }
   100  
   101  type nameVersion struct {
   102  	name    string
   103  	version string
   104  }
   105  
   106  func installedCCToNameVersion(cc chaincode.InstalledChaincode) nameVersion {
   107  	return nameVersion{
   108  		name:    cc.Name,
   109  		version: cc.Version,
   110  	}
   111  }
   112  
   113  func names(installedChaincodes []chaincode.InstalledChaincode) []string {
   114  	var ccs []string
   115  	for _, cc := range installedChaincodes {
   116  		ccs = append(ccs, cc.Name)
   117  	}
   118  	return ccs
   119  }