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sysccapi.go
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/
sysccapi.go
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/*
Copyright IBM Corp. 2016 All Rights Reserved.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package scc
import (
"fmt"
"golang.org/x/net/context"
"github.com/hyperledger/fabric/common/flogging"
"github.com/hyperledger/fabric/common/util"
"github.com/hyperledger/fabric/core/chaincode/shim"
"github.com/hyperledger/fabric/core/common/ccprovider"
"github.com/hyperledger/fabric/core/container/inproccontroller"
"github.com/hyperledger/fabric/core/peer"
"github.com/spf13/viper"
pb "github.com/hyperledger/fabric/protos/peer"
)
var sysccLogger = flogging.MustGetLogger("sccapi")
// SystemChaincode defines the metadata needed to initialize system chaincode
// when the fabric comes up. SystemChaincodes are installed by adding an
// entry in importsysccs.go
type SystemChaincode struct {
//Unique name of the system chaincode
Name string
//Path to the system chaincode; currently not used
Path string
//InitArgs initialization arguments to startup the system chaincode
InitArgs [][]byte
// Chaincode is the actual chaincode object
Chaincode shim.Chaincode
// InvokableExternal keeps track of whether
// this system chaincode can be invoked
// through a proposal sent to this peer
InvokableExternal bool
// InvokableCC2CC keeps track of whether
// this system chaincode can be invoked
// by way of a chaincode-to-chaincode
// invocation
InvokableCC2CC bool
// Enabled a convenient switch to enable/disable system chaincode without
// having to remove entry from importsysccs.go
Enabled bool
}
// RegisterSysCC registers the given system chaincode with the peer
func RegisterSysCC(syscc *SystemChaincode) error {
if !syscc.Enabled || !isWhitelisted(syscc) {
sysccLogger.Info(fmt.Sprintf("system chaincode (%s,%s,%t) disabled", syscc.Name, syscc.Path, syscc.Enabled))
return nil
}
err := inproccontroller.Register(syscc.Path, syscc.Chaincode)
if err != nil {
//if the type is registered, the instance may not be... keep going
if _, ok := err.(inproccontroller.SysCCRegisteredErr); !ok {
errStr := fmt.Sprintf("could not register (%s,%v): %s", syscc.Path, syscc, err)
sysccLogger.Error(errStr)
return fmt.Errorf(errStr)
}
}
sysccLogger.Infof("system chaincode %s(%s) registered", syscc.Name, syscc.Path)
return err
}
// deploySysCC deploys the given system chaincode on a chain
func deploySysCC(chainID string, syscc *SystemChaincode) error {
if !syscc.Enabled || !isWhitelisted(syscc) {
sysccLogger.Info(fmt.Sprintf("system chaincode (%s,%s) disabled", syscc.Name, syscc.Path))
return nil
}
var err error
ccprov := ccprovider.GetChaincodeProvider()
ctxt := context.Background()
if chainID != "" {
lgr := peer.GetLedger(chainID)
if lgr == nil {
panic(fmt.Sprintf("syschain %s start up failure - unexpected nil ledger for channel %s", syscc.Name, chainID))
}
_, err := ccprov.GetContext(lgr)
if err != nil {
return err
}
defer ccprov.ReleaseContext()
}
chaincodeID := &pb.ChaincodeID{Path: syscc.Path, Name: syscc.Name}
spec := &pb.ChaincodeSpec{Type: pb.ChaincodeSpec_Type(pb.ChaincodeSpec_Type_value["GOLANG"]), ChaincodeId: chaincodeID, Input: &pb.ChaincodeInput{Args: syscc.InitArgs}}
// First build and get the deployment spec
chaincodeDeploymentSpec, err := buildSysCC(ctxt, spec)
if err != nil {
sysccLogger.Error(fmt.Sprintf("Error deploying chaincode spec: %v\n\n error: %s", spec, err))
return err
}
txid := util.GenerateUUID()
version := util.GetSysCCVersion()
cccid := ccprov.GetCCContext(chainID, chaincodeDeploymentSpec.ChaincodeSpec.ChaincodeId.Name, version, txid, true, nil, nil)
_, _, err = ccprov.ExecuteWithErrorFilter(ctxt, cccid, chaincodeDeploymentSpec)
sysccLogger.Infof("system chaincode %s/%s(%s) deployed", syscc.Name, chainID, syscc.Path)
return err
}
// DeDeploySysCC stops the system chaincode and deregisters it from inproccontroller
func DeDeploySysCC(chainID string, syscc *SystemChaincode) error {
chaincodeID := &pb.ChaincodeID{Path: syscc.Path, Name: syscc.Name}
spec := &pb.ChaincodeSpec{Type: pb.ChaincodeSpec_Type(pb.ChaincodeSpec_Type_value["GOLANG"]), ChaincodeId: chaincodeID, Input: &pb.ChaincodeInput{Args: syscc.InitArgs}}
ctx := context.Background()
// First build and get the deployment spec
chaincodeDeploymentSpec, err := buildSysCC(ctx, spec)
if err != nil {
sysccLogger.Error(fmt.Sprintf("Error deploying chaincode spec: %v\n\n error: %s", spec, err))
return err
}
ccprov := ccprovider.GetChaincodeProvider()
version := util.GetSysCCVersion()
cccid := ccprov.GetCCContext(chainID, syscc.Name, version, "", true, nil, nil)
err = ccprov.Stop(ctx, cccid, chaincodeDeploymentSpec)
return err
}
// buildLocal builds a given chaincode code
func buildSysCC(context context.Context, spec *pb.ChaincodeSpec) (*pb.ChaincodeDeploymentSpec, error) {
var codePackageBytes []byte
chaincodeDeploymentSpec := &pb.ChaincodeDeploymentSpec{ExecEnv: pb.ChaincodeDeploymentSpec_SYSTEM, ChaincodeSpec: spec, CodePackage: codePackageBytes}
return chaincodeDeploymentSpec, nil
}
func isWhitelisted(syscc *SystemChaincode) bool {
chaincodes := viper.GetStringMapString("chaincode.system")
val, ok := chaincodes[syscc.Name]
enabled := val == "enable" || val == "true" || val == "yes"
return ok && enabled
}