Golang util.ToChaincodeArgs函數代碼示例

// Query callback representing the query of a chaincode
func (t *SimpleChaincode) Query(stub shim.ChaincodeStubInterface, function string, args []string) ([]byte, error) {
	if function != "query" {
		return nil, errors.New("Invalid query function name. Expecting \"query\"")
	}
	var sum string             // Sum entity
	var Aval, Bval, sumVal int // value of sum entity - to be computed
	var err error

	// Can query another chaincode within query, but cannot put state or invoke another chaincode (in transaction context)
	if len(args) != 2 {
		return nil, errors.New("Incorrect number of arguments. Expecting 2")
	}

	chaincodeURL := args[0]
	sum = args[1]

	// Query chaincode_example02
	f := "query"
	queryArgs := util.ToChaincodeArgs(f, "a")
	response, err := stub.QueryChaincode(chaincodeURL, queryArgs)
	if err != nil {
		errStr := fmt.Sprintf("Failed to query chaincode. Got error: %s", err.Error())
		fmt.Printf(errStr)
		return nil, errors.New(errStr)
	}
	Aval, err = strconv.Atoi(string(response))
	if err != nil {
		errStr := fmt.Sprintf("Error retrieving state from ledger for queried chaincode: %s", err.Error())
		fmt.Printf(errStr)
		return nil, errors.New(errStr)
	}

	queryArgs = util.ToChaincodeArgs(f, "b")
	response, err = stub.QueryChaincode(chaincodeURL, queryArgs)
	if err != nil {
		errStr := fmt.Sprintf("Failed to query chaincode. Got error: %s", err.Error())
		fmt.Printf(errStr)
		return nil, errors.New(errStr)
	}
	Bval, err = strconv.Atoi(string(response))
	if err != nil {
		errStr := fmt.Sprintf("Error retrieving state from ledger for queried chaincode: %s", err.Error())
		fmt.Printf(errStr)
		return nil, errors.New(errStr)
	}

	// Compute sum
	sumVal = Aval + Bval

	fmt.Printf("Query chaincode successful. Got sum %d\n", sumVal)
	jsonResp := "{\"Name\":\"" + sum + "\",\"Value\":\"" + strconv.Itoa(sumVal) + "\"}"
	fmt.Printf("Query Response:%s\n", jsonResp)
	return []byte(strconv.Itoa(sumVal)), nil
}

// Invoke queries another chaincode and updates its own state
func (t *SimpleChaincode) invoke(stub shim.ChaincodeStubInterface, args []string) ([]byte, error) {
	var sum string             // Sum entity
	var Aval, Bval, sumVal int // value of sum entity - to be computed
	var err error

	if len(args) != 2 {
		return nil, errors.New("Incorrect number of arguments. Expecting 2")
	}

	chaincodeURL := args[0] // Expecting "github.com/hyperledger/fabric/core/example/chaincode/chaincode_example02"
	sum = args[1]

	// Query chaincode_example02
	f := "query"
	queryArgs := util.ToChaincodeArgs(f, "a")
	response, err := stub.InvokeChaincode(chaincodeURL, queryArgs)
	if err != nil {
		errStr := fmt.Sprintf("Failed to query chaincode. Got error: %s", err.Error())
		fmt.Printf(errStr)
		return nil, errors.New(errStr)
	}
	Aval, err = strconv.Atoi(string(response))
	if err != nil {
		errStr := fmt.Sprintf("Error retrieving state from ledger for queried chaincode: %s", err.Error())
		fmt.Printf(errStr)
		return nil, errors.New(errStr)
	}

	queryArgs = util.ToChaincodeArgs(f, "b")
	response, err = stub.InvokeChaincode(chaincodeURL, queryArgs)
	if err != nil {
		errStr := fmt.Sprintf("Failed to query chaincode. Got error: %s", err.Error())
		fmt.Printf(errStr)
		return nil, errors.New(errStr)
	}
	Bval, err = strconv.Atoi(string(response))
	if err != nil {
		errStr := fmt.Sprintf("Error retrieving state from ledger for queried chaincode: %s", err.Error())
		fmt.Printf(errStr)
		return nil, errors.New(errStr)
	}

	// Compute sum
	sumVal = Aval + Bval

	// Write sumVal back to the ledger
	err = stub.PutState(sum, []byte(strconv.Itoa(sumVal)))
	if err != nil {
		return nil, err
	}

	fmt.Printf("Invoke chaincode successful. Got sum %d\n", sumVal)
	return []byte(strconv.Itoa(sumVal)), nil
}

//helper
func (p *PassthruChaincode) iq(invoke bool, stub shim.ChaincodeStubInterface, function string, args []string) ([]byte, error) {
	if function == "" {
		return nil, errors.New("Chaincode ID not provided")
	}
	chaincodeID := function

	if invoke {
		return stub.InvokeChaincode(chaincodeID, util.ToChaincodeArgs(args...))
	}
	return stub.QueryChaincode(chaincodeID, util.ToChaincodeArgs(args...))
}

// TestUpgradeAndInvoke deploys chaincode_example01, upgrade it with chaincode_example02, then invoke it
func TestDeployAndUpgrade(t *testing.T) {
	chainID := util.GetTestChainID()
	var ctxt = context.Background()

	url1 := "github.com/hyperledger/fabric/examples/chaincode/go/chaincode_example01"
	url2 := "github.com/hyperledger/fabric/examples/chaincode/go/chaincode_example02"
	chaincodeID1 := &pb.ChaincodeID{Path: url1, Name: "upgradeex01"}
	chaincodeID2 := &pb.ChaincodeID{Path: url2, Name: "upgradeex01"}

	f := "init"
	argsDeploy := util.ToChaincodeArgs(f, "a", "100", "b", "200")
	spec := &pb.ChaincodeSpec{Type: 1, ChaincodeID: chaincodeID1, CtorMsg: &pb.ChaincodeInput{Args: argsDeploy}}

	cccid1 := chaincode.NewCCContext(chainID, "upgradeex01", "", "", false, nil)
	cccid2 := chaincode.NewCCContext(chainID, "upgradeex02", "", "", false, nil)

	resp, prop, err := deploy(endorserServer, chainID, spec, nil)

	chaincodeName := spec.ChaincodeID.Name
	if err != nil {
		t.Fail()
		chaincode.GetChain().Stop(ctxt, cccid1, &pb.ChaincodeDeploymentSpec{ChaincodeSpec: &pb.ChaincodeSpec{ChaincodeID: chaincodeID1}})
		chaincode.GetChain().Stop(ctxt, cccid2, &pb.ChaincodeDeploymentSpec{ChaincodeSpec: &pb.ChaincodeSpec{ChaincodeID: chaincodeID2}})
		t.Logf("Error deploying <%s>: %s", chaincodeName, err)
		return
	}

	err = endorserServer.(*Endorser).commitTxSimulation(prop, chainID, signer, resp)
	if err != nil {
		t.Fail()
		chaincode.GetChain().Stop(ctxt, cccid1, &pb.ChaincodeDeploymentSpec{ChaincodeSpec: &pb.ChaincodeSpec{ChaincodeID: chaincodeID1}})
		chaincode.GetChain().Stop(ctxt, cccid2, &pb.ChaincodeDeploymentSpec{ChaincodeSpec: &pb.ChaincodeSpec{ChaincodeID: chaincodeID2}})
		t.Logf("Error committing <%s>: %s", chaincodeName, err)
		return
	}

	argsUpgrade := util.ToChaincodeArgs(f, "a", "150", "b", "300")
	spec = &pb.ChaincodeSpec{Type: 1, ChaincodeID: chaincodeID2, CtorMsg: &pb.ChaincodeInput{Args: argsUpgrade}}
	resp, prop, err = upgrade(endorserServer, chainID, spec, nil)
	if err != nil {
		t.Fail()
		chaincode.GetChain().Stop(ctxt, cccid1, &pb.ChaincodeDeploymentSpec{ChaincodeSpec: &pb.ChaincodeSpec{ChaincodeID: chaincodeID1}})
		chaincode.GetChain().Stop(ctxt, cccid2, &pb.ChaincodeDeploymentSpec{ChaincodeSpec: &pb.ChaincodeSpec{ChaincodeID: chaincodeID2}})
		t.Logf("Error upgrading <%s>: %s", chaincodeName, err)
		return
	}

	fmt.Printf("Upgrade test passed\n")
	t.Logf("Upgrade test passed")

	chaincode.GetChain().Stop(ctxt, cccid1, &pb.ChaincodeDeploymentSpec{ChaincodeSpec: &pb.ChaincodeSpec{ChaincodeID: chaincodeID1}})
	chaincode.GetChain().Stop(ctxt, cccid2, &pb.ChaincodeDeploymentSpec{ChaincodeSpec: &pb.ChaincodeSpec{ChaincodeID: chaincodeID2}})
}

// Test the invocation of a transaction.
func TestRangeQuery(t *testing.T) {
	//TODO enable after ledger enables RangeQuery
	t.Skip()

	chainID := util.GetTestChainID()

	lis, err := initPeer(chainID)
	if err != nil {
		t.Fail()
		t.Logf("Error creating peer: %s", err)
	}

	defer finitPeer(lis, chainID)

	var ctxt = context.Background()

	url := "github.com/hyperledger/fabric/examples/chaincode/go/map"
	cID := &pb.ChaincodeID{Name: "tmap", Path: url}

	f := "init"
	args := util.ToChaincodeArgs(f)

	spec := &pb.ChaincodeSpec{Type: 1, ChaincodeID: cID, CtorMsg: &pb.ChaincodeInput{Args: args}}

	cccid := NewCCContext(chainID, "tmap", "", "", false, nil)

	_, err = deploy(ctxt, cccid, spec)
	chaincodeID := spec.ChaincodeID.Name
	if err != nil {
		t.Fail()
		t.Logf("Error initializing chaincode %s(%s)", chaincodeID, err)
		theChaincodeSupport.Stop(ctxt, cccid, &pb.ChaincodeDeploymentSpec{ChaincodeSpec: spec})
		return
	}

	// Invoke second chaincode, which will inturn invoke the first chaincode
	f = "keys"
	args = util.ToChaincodeArgs(f)

	spec = &pb.ChaincodeSpec{Type: 1, ChaincodeID: cID, CtorMsg: &pb.ChaincodeInput{Args: args}}
	_, _, _, err = invoke(ctxt, chainID, spec)

	if err != nil {
		t.Fail()
		t.Logf("Error invoking <%s>: %s", chaincodeID, err)
		theChaincodeSupport.Stop(ctxt, cccid, &pb.ChaincodeDeploymentSpec{ChaincodeSpec: spec})
		return
	}
	theChaincodeSupport.Stop(ctxt, cccid, &pb.ChaincodeDeploymentSpec{ChaincodeSpec: spec})
}

// Invoke chaincode_example02
func invokeExample02Transaction(ctxt context.Context, cccid *CCContext, cID *pb.ChaincodeID, args []string, destroyImage bool) error {

	f := "init"
	argsDeploy := util.ToChaincodeArgs(f, "a", "100", "b", "200")
	spec := &pb.ChaincodeSpec{Type: 1, ChaincodeID: cID, CtorMsg: &pb.ChaincodeInput{Args: argsDeploy}}
	_, err := deploy(ctxt, cccid, spec)
	chaincodeID := spec.ChaincodeID.Name
	if err != nil {
		return fmt.Errorf("Error deploying <%s>: %s", chaincodeID, err)
	}

	time.Sleep(time.Second)

	if destroyImage {
		theChaincodeSupport.Stop(ctxt, cccid, &pb.ChaincodeDeploymentSpec{ChaincodeSpec: spec})
		dir := container.DestroyImageReq{CCID: ccintf.CCID{ChaincodeSpec: spec, NetworkID: theChaincodeSupport.peerNetworkID, PeerID: theChaincodeSupport.peerID, ChainID: cccid.ChainID}, Force: true, NoPrune: true}

		_, err = container.VMCProcess(ctxt, container.DOCKER, dir)
		if err != nil {
			err = fmt.Errorf("Error destroying image: %s", err)
			return err
		}
	}

	f = "invoke"
	invokeArgs := append([]string{f}, args...)
	spec = &pb.ChaincodeSpec{Type: 1, ChaincodeID: cID, CtorMsg: &pb.ChaincodeInput{Args: util.ToChaincodeArgs(invokeArgs...)}}
	_, uuid, _, err := invoke(ctxt, cccid.ChainID, spec)
	if err != nil {
		return fmt.Errorf("Error invoking <%s>: %s", cccid.Name, err)
	}

	cccid.TxID = uuid
	err = checkFinalState(cccid)
	if err != nil {
		return fmt.Errorf("Incorrect final state after transaction for <%s>: %s", chaincodeID, err)
	}

	// Test for delete state
	f = "delete"
	delArgs := util.ToChaincodeArgs(f, "a")
	spec = &pb.ChaincodeSpec{Type: 1, ChaincodeID: cID, CtorMsg: &pb.ChaincodeInput{Args: delArgs}}
	_, uuid, _, err = invoke(ctxt, cccid.ChainID, spec)
	if err != nil {
		return fmt.Errorf("Error deleting state in <%s>: %s", cccid.Name, err)
	}

	return nil
}

func deploy(admCert crypto.CertificateHandler) error {
	// Prepare the spec. The metadata includes the identity of the administrator
	spec := &pb.ChaincodeSpec{
		Type:                 1,
		ChaincodeID:          &pb.ChaincodeID{Name: "mycc"},
		CtorMsg:              &pb.ChaincodeInput{Args: util.ToChaincodeArgs("init")},
		Metadata:             admCert.GetCertificate(),
		ConfidentialityLevel: pb.ConfidentialityLevel_PUBLIC,
	}

	// First build and get the deployment spec
	var ctx = context.Background()
	chaincodeDeploymentSpec, err := getDeploymentSpec(ctx, spec)
	if err != nil {
		return err
	}

	tid := chaincodeDeploymentSpec.ChaincodeSpec.ChaincodeID.Name

	// Now create the Transactions message and send to Peer.
	transaction, err := administrator.NewChaincodeDeployTransaction(chaincodeDeploymentSpec, tid)
	if err != nil {
		return fmt.Errorf("Error deploying chaincode: %s ", err)
	}

	ledger, err := ledger.GetLedger()
	ledger.BeginTxBatch("1")
	_, _, err = chaincode.Execute(ctx, chaincode.GetChain(chaincode.DefaultChain), transaction)
	if err != nil {
		return fmt.Errorf("Error deploying chaincode: %s", err)
	}
	ledger.CommitTxBatch("1", []*pb.Transaction{transaction}, nil, nil)

	return err
}

// Execute multiple transactions and queries.
func exec(ctxt context.Context, chainID string, chaincodeID string, numTrans int, numQueries int) []error {
	var wg sync.WaitGroup
	errs := make([]error, numTrans+numQueries)

	e := func(qnum int) {
		defer wg.Done()
		var spec *pb.ChaincodeSpec
		args := util.ToChaincodeArgs("invoke", "a", "b", "10")

		spec = &pb.ChaincodeSpec{Type: 1, ChaincodeID: &pb.ChaincodeID{Name: chaincodeID}, CtorMsg: &pb.ChaincodeInput{Args: args}}

		_, _, _, err := invoke(ctxt, chainID, spec)

		if err != nil {
			errs[qnum] = fmt.Errorf("Error executing <%s>: %s", chaincodeID, err)
			return
		}
	}
	wg.Add(numTrans + numQueries)

	//execute transactions sequentially..
	go func() {
		for i := 0; i < numTrans; i++ {
			e(i)
		}
	}()

	wg.Wait()
	return errs
}

// Invoke invokes another chaincode - chaincode_example02, upon receipt of an event and changes event state
func (t *SimpleChaincode) Invoke(stub shim.ChaincodeStubInterface, function string, args []string) ([]byte, error) {
	var event string    // Event entity
	var eventVal string // State of event
	var err error
	var amount int

	event = args[0]
	eventVal = args[1]
	chainCodeToCall := args[2] // Get the chaincode to call from the ledger

	if eventVal == "middleSchool" {
		amount = 2000
	} else {
		amount = 5000
	}

	// 轉賬操作
	invokeArgs := util.ToChaincodeArgs("transferAcc", args[3], args[4], strconv.Itoa(amount))
	response, err := stub.InvokeChaincode(chainCodeToCall, invokeArgs)
	if err != nil {
		errStr := fmt.Sprintf("Failed to invoke chaincode. Got error: %s", err.Error())
		fmt.Printf(errStr)
		return nil, errors.New(errStr)
	}

	fmt.Printf("Invoke chaincode successful. Got response %s", string(response))

	// Write the event state back to the ledger
	err = stub.PutState(event, []byte(args[1]))
	if err != nil {
		return nil, err
	}

	return nil, nil
}

func deployInternal(deployer crypto.Client, adminCert crypto.CertificateHandler) (resp *pb.Response, err error) {
	// Prepare the spec. The metadata includes the identity of the administrator
	spec := &pb.ChaincodeSpec{
		Type:        1,
		ChaincodeID: &pb.ChaincodeID{Path: "github.com/hyperledger/fabric/examples/chaincode/go/asset_management"},
		//ChaincodeID:          &pb.ChaincodeID{Name: chaincodeName},
		CtorMsg:              &pb.ChaincodeInput{Args: util.ToChaincodeArgs("init")},
		Metadata:             adminCert.GetCertificate(),
		ConfidentialityLevel: confidentialityLevel,
	}

	// First build the deployment spec
	cds, err := getChaincodeBytes(spec)
	if err != nil {
		return nil, fmt.Errorf("Error getting deployment spec: %s ", err)
	}

	// Now create the Transactions message and send to Peer.
	transaction, err := deployer.NewChaincodeDeployTransaction(cds, cds.ChaincodeSpec.ChaincodeID.Name)
	if err != nil {
		return nil, fmt.Errorf("Error deploying chaincode: %s ", err)
	}

	resp, err = processTransaction(transaction)

	appLogger.Debugf("resp [%s]", resp.String())

	chaincodeName = cds.ChaincodeSpec.ChaincodeID.Name
	appLogger.Debugf("ChaincodeName [%s]", chaincodeName)

	return
}

func whoIsTheOwner(asset string) ([]byte, error) {
	chaincodeInput := &pb.ChaincodeInput{Args: util.ToChaincodeArgs("query", asset)}

	// Prepare spec and submit
	spec := &pb.ChaincodeSpec{
		Type:                 1,
		ChaincodeID:          &pb.ChaincodeID{Name: "mycc"},
		CtorMsg:              chaincodeInput,
		ConfidentialityLevel: pb.ConfidentialityLevel_PUBLIC,
	}

	var ctx = context.Background()
	chaincodeInvocationSpec := &pb.ChaincodeInvocationSpec{ChaincodeSpec: spec}

	tid := chaincodeInvocationSpec.ChaincodeSpec.ChaincodeID.Name

	// Now create the Transactions message and send to Peer.
	transaction, err := administrator.NewChaincodeQuery(chaincodeInvocationSpec, tid)
	if err != nil {
		return nil, fmt.Errorf("Error deploying chaincode: %s ", err)
	}

	ledger, err := ledger.GetLedger()
	ledger.BeginTxBatch("1")
	result, _, err := chaincode.Execute(ctx, chaincode.GetChain(chaincode.DefaultChain), transaction)
	if err != nil {
		return nil, fmt.Errorf("Error deploying chaincode: %s", err)
	}
	ledger.CommitTxBatch("1", []*pb.Transaction{transaction}, nil, nil)

	return result, err
}

func executeDeployTransaction(t *testing.T, chainID string, name string, url string) {
	lis, err := initPeer(chainID)
	if err != nil {
		t.Fail()
		t.Logf("Error creating peer: %s", err)
	}

	defer finitPeer(lis, chainID)

	var ctxt = context.Background()

	f := "init"
	args := util.ToChaincodeArgs(f, "a", "100", "b", "200")
	spec := &pb.ChaincodeSpec{Type: 1, ChaincodeID: &pb.ChaincodeID{Name: name, Path: url}, CtorMsg: &pb.ChaincodeInput{Args: args}}

	cccid := NewCCContext(chainID, name, "", "", false, nil)

	_, err = deploy(ctxt, cccid, spec)

	chaincodeID := spec.ChaincodeID.Name
	if err != nil {
		theChaincodeSupport.Stop(ctxt, cccid, &pb.ChaincodeDeploymentSpec{ChaincodeSpec: spec})
		t.Fail()
		t.Logf("Error deploying <%s>: %s", chaincodeID, err)
		return
	}

	theChaincodeSupport.Stop(ctxt, cccid, &pb.ChaincodeDeploymentSpec{ChaincodeSpec: spec})
}

func InitTestStub(funargs ...string) *ChaincodeStub {
	stub := ChaincodeStub{}
	allargs := util.ToChaincodeArgs(funargs...)
	newCI := &pb.ChaincodeInput{Args: allargs}
	stub.init(&Handler{}, "TEST-txid", newCI)
	return &stub
}

// Execute multiple transactions and queries.
func exec(ctxt context.Context, chaincodeID string, numTrans int, numQueries int) []error {
	var wg sync.WaitGroup
	errs := make([]error, numTrans+numQueries)

	e := func(qnum int, typ pb.Transaction_Type) {
		defer wg.Done()
		var spec *pb.ChaincodeSpec
		if typ == pb.Transaction_CHAINCODE_INVOKE {
			f := "invoke"
			args := util.ToChaincodeArgs(f, "a", "b", "10")

			spec = &pb.ChaincodeSpec{Type: 1, ChaincodeID: &pb.ChaincodeID{Name: chaincodeID}, CtorMsg: &pb.ChaincodeInput{Args: args}}
		} else {
			f := "query"
			args := util.ToChaincodeArgs(f, "a")

			spec = &pb.ChaincodeSpec{Type: 1, ChaincodeID: &pb.ChaincodeID{Name: chaincodeID}, CtorMsg: &pb.ChaincodeInput{Args: args}}
		}

		_, _, _, err := invoke(ctxt, spec, typ)

		if err != nil {
			errs[qnum] = fmt.Errorf("Error executing <%s>: %s", chaincodeID, err)
			return
		}
	}
	wg.Add(numTrans + numQueries)

	//execute transactions sequentially..
	go func() {
		for i := 0; i < numTrans; i++ {
			e(i, pb.Transaction_CHAINCODE_INVOKE)
		}
	}()

	//...but queries in parallel
	for i := numTrans; i < numTrans+numQueries; i++ {
		go e(i, pb.Transaction_CHAINCODE_QUERY)
	}

	wg.Wait()
	return errs
}

func transferOwnership(owner crypto.Client, ownerCert crypto.CertificateHandler, fromAttributes string,
	newOwnerCert crypto.CertificateHandler, toAttributes string, amount string) error {
	// Get a transaction handler to be used to submit the execute transaction
	// and bind the chaincode access control logic using the binding

	submittingCertHandler, err := owner.GetTCertificateHandlerNext("role")
	if err != nil {
		return err
	}
	txHandler, err := submittingCertHandler.GetTransactionHandler()
	if err != nil {
		return err
	}

	chaincodeInput := &pb.ChaincodeInput{Args: util.ToChaincodeArgs(
		"transferOwnership",
		base64.StdEncoding.EncodeToString(ownerCert.GetCertificate()),
		fromAttributes,
		base64.StdEncoding.EncodeToString(newOwnerCert.GetCertificate()),
		toAttributes,
		amount)}

	// Prepare spec and submit
	spec := &pb.ChaincodeSpec{
		Type:                 1,
		ChaincodeID:          &pb.ChaincodeID{Name: "mycc"},
		CtorMsg:              chaincodeInput,
		ConfidentialityLevel: pb.ConfidentialityLevel_PUBLIC,
	}

	var ctx = context.Background()
	chaincodeInvocationSpec := &pb.ChaincodeInvocationSpec{ChaincodeSpec: spec}

	tid := chaincodeInvocationSpec.ChaincodeSpec.ChaincodeID.Name

	// Now create the Transactions message and send to Peer.
	transaction, err := txHandler.NewChaincodeExecute(chaincodeInvocationSpec, tid)
	if err != nil {
		return fmt.Errorf("Error deploying chaincode: %s ", err)
	}

	ledger, err := ledger.GetLedger()
	ledger.BeginTxBatch("1")
	_, _, err = chaincode.Execute(ctx, chaincode.GetChain(chaincode.DefaultChain), transaction)
	if err != nil {
		return fmt.Errorf("Error deploying chaincode: %s", err)
	}
	ledger.CommitTxBatch("1", []*pb.Transaction{transaction}, nil, nil)

	return err

}