func (*Endorser) getTxSimulator(ledgername string) (ledger.TxSimulator, error) {
lgr := peer.GetLedger(ledgername)
if lgr == nil {
return nil, fmt.Errorf("chain does not exist(%s)", ledgername)
}
return lgr.NewTxSimulator()
}
func startTxSimulation(ctxt context.Context, chainID string) (context.Context, ledger.TxSimulator, error) {
lgr := peer.GetLedger(chainID)
txsim, err := lgr.NewTxSimulator()
if err != nil {
return nil, nil, err
}
ctxt = context.WithValue(ctxt, TXSimulatorKey, txsim)
return ctxt, txsim, nil
}
func finitPeer(lis net.Listener, chainIDs ...string) {
if lis != nil {
for _, c := range chainIDs {
deRegisterSysCCs(c)
if lgr := peer.GetLedger(c); lgr != nil {
lgr.Close()
}
}
closeListenerAndSleep(lis)
}
ledgerPath := viper.GetString("peer.fileSystemPath")
os.RemoveAll(ledgerPath)
os.RemoveAll(filepath.Join(os.TempDir(), "hyperledger"))
}
// 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
}
if chainID == "" && !syscc.ChainlessCC {
return fmt.Errorf("cannot deploy system chaincode %s without chain id", syscc.Name)
} else if chainID != "" && syscc.ChainlessCC {
return fmt.Errorf("cannot deploy chainless system chaincode %s with chain id %s", syscc.Name, chainID)
}
var err error
ctxt := context.Background()
if !syscc.ChainlessCC {
lgr := peer.GetLedger(chainID)
var txsim ledger.TxSimulator
if txsim, err = lgr.NewTxSimulator(); err != nil {
return err
}
ctxt = context.WithValue(ctxt, TXSimulatorKey, txsim)
defer txsim.Done()
}
chaincodeID := &pb.ChaincodeID{Path: syscc.Path, Name: syscc.Name}
spec := &pb.ChaincodeSpec{Type: pb.ChaincodeSpec_Type(pb.ChaincodeSpec_Type_value["GOLANG"]), ChaincodeID: chaincodeID, CtorMsg: &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()
cccid := NewCCContext(chainID, chaincodeDeploymentSpec.ChaincodeSpec.ChaincodeID.Name, "", txid, true, nil)
_, _, err = Execute(ctxt, cccid, chaincodeDeploymentSpec)
sysccLogger.Infof("system chaincode %s/%s(%s) deployed", syscc.Name, chainID, syscc.Path)
return err
}
func isTxValidForVscc(payload *common.Payload, envBytes []byte) error {
// TODO: Extract the VSCC/policy from LCCC as soon as this is ready
vscc := "vscc"
chainName := payload.Header.ChainHeader.ChainID
if chainName == "" {
err := fmt.Errorf("transaction header does not contain an chain ID")
logger.Errorf("%s", err)
return err
}
txid := "N/A" // FIXME: is that appropriate?
// build arguments for VSCC invocation
// args[0] - function name (not used now)
// args[1] - serialized Envelope
args := [][]byte{[]byte(""), envBytes}
// create VSCC invocation proposal
vsccCis := &pb.ChaincodeInvocationSpec{ChaincodeSpec: &pb.ChaincodeSpec{Type: pb.ChaincodeSpec_GOLANG, ChaincodeID: &pb.ChaincodeID{Name: vscc}, CtorMsg: &pb.ChaincodeInput{Args: args}}}
prop, err := putils.CreateProposalFromCIS(txid, chainName, vsccCis, []byte(""))
if err != nil {
logger.Errorf("Cannot create a proposal to invoke VSCC, err %s\n", err)
return err
}
// get context for the chaincode execution
var txsim ledger.TxSimulator
lgr := peer.GetLedger(chainName)
txsim, err = lgr.NewTxSimulator()
if err != nil {
logger.Errorf("Cannot obtain tx simulator, err %s\n", err)
return err
}
defer txsim.Done()
ctxt := context.WithValue(context.Background(), chaincode.TXSimulatorKey, txsim)
cccid := chaincode.NewCCContext(chainName, vscc, "", txid, true, prop)
// invoke VSCC
_, _, err = chaincode.ExecuteChaincode(ctxt, cccid, args)
if err != nil {
logger.Errorf("VSCC check failed for transaction, error %s", err)
return err
}
return nil
}
func endTxSimulation(chainID string, txsim ledger.TxSimulator, payload []byte, commit bool, prop *pb.Proposal) error {
txsim.Done()
if lgr := peer.GetLedger(chainID); lgr != nil {
if commit {
var txSimulationResults []byte
var err error
//get simulation results
if txSimulationResults, err = txsim.GetTxSimulationResults(); err != nil {
return err
}
// assemble a (signed) proposal response message
resp, err := putils.CreateProposalResponse(prop.Header, prop.Payload, txSimulationResults, nil, nil, signer)
if err != nil {
return err
}
// get the envelope
env, err := putils.CreateSignedTx(prop, signer, resp)
if err != nil {
return err
}
envBytes, err := putils.GetBytesEnvelope(env)
if err != nil {
return err
}
//create the block with 1 transaction
block := common.NewBlock(1, []byte{})
block.Data.Data = [][]byte{envBytes}
//commit the block
if err := lgr.Commit(block); err != nil {
return err
}
}
}
return nil
}
// Only exposed for testing purposes - commit the tx simulation so that
// a deploy transaction is persisted and that chaincode can be invoked.
// This makes the endorser test self-sufficient
func (e *Endorser) commitTxSimulation(proposal *pb.Proposal, chainID string, signer msp.SigningIdentity, pResp *pb.ProposalResponse) error {
tx, err := putils.CreateSignedTx(proposal, signer, pResp)
if err != nil {
return err
}
lgr := peer.GetLedger(chainID)
if lgr == nil {
return fmt.Errorf("failure while looking up the ledger")
}
txBytes, err := proto.Marshal(tx)
if err != nil {
return err
}
block := common.NewBlock(1, []byte{})
block.Data.Data = [][]byte{txBytes}
block.Header.DataHash = block.Data.Hash()
if err = lgr.Commit(block); err != nil {
return err
}
return nil
}