// Invoke or query a chaincode.
func invoke(ctx context.Context, spec *pb.ChaincodeSpec, typ pb.Transaction_Type) (*pb.ChaincodeEvent, string, []byte, error) {
chaincodeInvocationSpec := &pb.ChaincodeInvocationSpec{ChaincodeSpec: spec}
// Now create the Transactions message and send to Peer.
uuid := util.GenerateUUID()
var transaction *pb.Transaction
var err error
transaction, err = pb.NewChaincodeExecute(chaincodeInvocationSpec, uuid, typ)
if err != nil {
return nil, uuid, nil, fmt.Errorf("Error invoking chaincode: %s ", err)
}
var retval []byte
var execErr error
var ccevt *pb.ChaincodeEvent
if typ == pb.Transaction_CHAINCODE_QUERY {
retval, ccevt, execErr = chaincode.Execute(ctx, chaincode.GetChain(chaincode.DefaultChain), transaction)
} else {
ledger, _ := ledger.GetLedger()
ledger.BeginTxBatch("1")
retval, ccevt, execErr = chaincode.Execute(ctx, chaincode.GetChain(chaincode.DefaultChain), transaction)
if err != nil {
return nil, uuid, nil, fmt.Errorf("Error invoking chaincode: %s ", err)
}
ledger.CommitTxBatch("1", []*pb.Transaction{transaction}, nil, nil)
}
return ccevt, uuid, retval, execErr
}
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
}
func transferOwnership(owner crypto.Client, ownerCert crypto.CertificateHandler, asset string, newOwnerCert crypto.CertificateHandler) 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()
if err != nil {
return err
}
txHandler, err := submittingCertHandler.GetTransactionHandler()
if err != nil {
return err
}
binding, err := txHandler.GetBinding()
if err != nil {
return err
}
chaincodeInput := &pb.ChaincodeInput{Function: "transfer", Args: []string{asset, string(newOwnerCert.GetCertificate())}}
chaincodeInputRaw, err := proto.Marshal(chaincodeInput)
if err != nil {
return err
}
// Access control. Owner signs chaincodeInputRaw || binding to confirm his identity
sigma, err := ownerCert.Sign(append(chaincodeInputRaw, binding...))
if err != nil {
return err
}
// Prepare spec and submit
spec := &pb.ChaincodeSpec{
Type: 1,
ChaincodeID: &pb.ChaincodeID{Name: "mycc"},
CtorMsg: chaincodeInput,
Metadata: sigma, // Proof of identity
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
}
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 (handler *ConsensusHandler) doChainQuery(tx *pb.Transaction) error {
var response *pb.Response
var err error
// Verify transaction signature if security is enabled
secHelper := handler.coordinator.GetSecHelper()
if nil != secHelper {
if logger.IsEnabledFor(logging.DEBUG) {
logger.Debug("Verifying transaction signature %s", tx.Uuid)
}
if tx, err = secHelper.TransactionPreValidation(tx); nil != err {
response = &pb.Response{Status: pb.Response_FAILURE, Msg: []byte(err.Error())}
logger.Debug("Failed to verify transaction %v", err)
}
}
// execute if response nil (ie, no error)
if nil == response {
// The secHelper is set during creat ChaincodeSupport, so we don't need this step
// cxt := context.WithValue(context.Background(), "security", secHelper)
cxt := context.Background()
result, err := chaincode.Execute(cxt, chaincode.GetChain(chaincode.DefaultChain), tx)
if err != nil {
response = &pb.Response{Status: pb.Response_FAILURE,
Msg: []byte(fmt.Sprintf("Error:%s", err))}
} else {
response = &pb.Response{Status: pb.Response_SUCCESS, Msg: result}
}
}
payload, _ := proto.Marshal(response)
handler.SendMessage(&pb.Message{Type: pb.Message_RESPONSE, Payload: payload})
return nil
}
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
}
// ProcessTransactionMsg processes a Message in context of a Transaction
func (eng *EngineImpl) ProcessTransactionMsg(msg *pb.Message, tx *pb.Transaction) (response *pb.Response) {
//TODO: Do we always verify security, or can we supply a flag on the invoke ot this functions so to bypass check for locally generated transactions?
if tx.Type == pb.Transaction_CHAINCODE_QUERY {
if !engine.helper.valid {
logger.Warning("Rejecting query because state is currently not valid")
return &pb.Response{Status: pb.Response_FAILURE,
Msg: []byte("Error: state may be inconsistent, cannot query")}
}
// The secHelper is set during creat ChaincodeSupport, so we don't need this step
// cxt := context.WithValue(context.Background(), "security", secHelper)
cxt := context.Background()
//query will ignore events as these are not stored on ledger (and query can report
//"event" data synchronously anyway)
result, _, err := chaincode.Execute(cxt, chaincode.GetChain(chaincode.DefaultChain), tx)
if err != nil {
response = &pb.Response{Status: pb.Response_FAILURE,
Msg: []byte(fmt.Sprintf("Error:%s", err))}
} else {
response = &pb.Response{Status: pb.Response_SUCCESS, Msg: result}
}
} else {
// Chaincode Transaction
response = &pb.Response{Status: pb.Response_SUCCESS, Msg: []byte(tx.Uuid)}
//TODO: Do we need to verify security, or can we supply a flag on the invoke ot this functions
// If we fail to marshal or verify the tx, don't send it to consensus plugin
if response.Status == pb.Response_FAILURE {
return response
}
// Pass the message to the consenter (eg. PBFT) NOTE: Make sure engine has been initialized
if eng.consenter == nil {
return &pb.Response{Status: pb.Response_FAILURE, Msg: []byte("Engine not initialized")}
}
// TODO, do we want to put these requests into a queue? This will block until
// the consenter gets around to handling the message, but it also provides some
// natural feedback to the REST API to determine how long it takes to queue messages
err := eng.consenter.RecvMsg(msg, eng.peerEndpoint.ID)
if err != nil {
response = &pb.Response{Status: pb.Response_FAILURE, Msg: []byte(err.Error())}
}
}
return response
}
// deployLocal deploys the supplied chaincode image to the local peer
func deploySysCC(ctx context.Context, spec *protos.ChaincodeSpec) error {
// 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
}
transaction, err := protos.NewChaincodeDeployTransaction(chaincodeDeploymentSpec, chaincodeDeploymentSpec.ChaincodeSpec.ChaincodeID.Name)
if err != nil {
return fmt.Errorf("Error deploying chaincode: %s ", err)
}
_, _, err = chaincode.Execute(ctx, chaincode.GetChain(chaincode.DefaultChain), transaction)
return err
}
// DeployLocal deploys the supplied chaincode image to the local peer
func DeployLocal(ctx context.Context, spec *protos.ChaincodeSpec, gbexists bool) (*protos.Transaction, []byte, error) {
// First build and get the deployment spec
chaincodeDeploymentSpec, err := BuildLocal(ctx, spec)
if err != nil {
genesisLogger.Error(fmt.Sprintf("Error deploying chaincode spec: %v\n\n error: %s", spec, err))
return nil, nil, err
}
var transaction *protos.Transaction
if gbexists {
ledger, err := ledger.GetLedger()
if err != nil {
return nil, nil, fmt.Errorf("Failed to get handle to ledger (%s)", err)
}
transaction, err = ledger.GetTransactionByUUID(chaincodeDeploymentSpec.ChaincodeSpec.ChaincodeID.Name)
if err != nil {
genesisLogger.Warning(fmt.Sprintf("cannot get deployment transaction for %s - %s", chaincodeDeploymentSpec.ChaincodeSpec.ChaincodeID.Name, err))
transaction = nil
} else {
genesisLogger.Debug("deployment transaction for %s exists", chaincodeDeploymentSpec.ChaincodeSpec.ChaincodeID.Name)
}
}
if transaction == nil {
transaction, err = protos.NewChaincodeDeployTransaction(chaincodeDeploymentSpec, chaincodeDeploymentSpec.ChaincodeSpec.ChaincodeID.Name)
if err != nil {
return nil, nil, fmt.Errorf("Error deploying chaincode: %s ", err)
}
}
//chaincode.NewChaincodeSupport(chaincode.DefaultChain, peer.GetPeerEndpoint, false, 120000)
// The secHelper is set during creat ChaincodeSupport, so we don't need this step
//ctx = context.WithValue(ctx, "security", secCxt)
result, err := chaincode.Execute(ctx, chaincode.GetChain(chaincode.DefaultChain), transaction)
return transaction, result, err
}
func read(invoker crypto.Client, invokerCert crypto.CertificateHandler) ([]byte, error) {
// Get a transaction handler to be used to submit the query transaction
// and bind the chaincode access control logic using the binding
submittingCertHandler, err := invoker.GetTCertificateHandlerNext()
if err != nil {
return nil, err
}
txHandler, err := submittingCertHandler.GetTransactionHandler()
if err != nil {
return nil, err
}
binding, err := txHandler.GetBinding()
if err != nil {
return nil, err
}
chaincodeInput := &pb.ChaincodeInput{Args: util.ToChaincodeArgs("read")}
chaincodeInputRaw, err := proto.Marshal(chaincodeInput)
if err != nil {
return nil, err
}
// Access control:
// invokerCert signs invokerCert.GetCertificate() || chaincodeInputRaw || binding to confirm his identity
sigma, err := invokerCert.Sign(append(invokerCert.GetCertificate(), append(chaincodeInputRaw, binding...)...))
if err != nil {
return nil, err
}
rbacMetadata := RBACMetadata{invokerCert.GetCertificate(), sigma}
rbacMetadataRaw, err := asn1.Marshal(rbacMetadata)
if err != nil {
return nil, err
}
// Prepare spec and submit
spec := &pb.ChaincodeSpec{
Type: 1,
ChaincodeID: &pb.ChaincodeID{Name: "mycc"},
CtorMsg: chaincodeInput,
Metadata: rbacMetadataRaw,
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.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 addRole(admCert crypto.CertificateHandler, idCert crypto.CertificateHandler, role 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 := administrator.GetTCertificateHandlerNext()
if err != nil {
return err
}
txHandler, err := submittingCertHandler.GetTransactionHandler()
if err != nil {
return err
}
binding, err := txHandler.GetBinding()
if err != nil {
return err
}
chaincodeInput := &pb.ChaincodeInput{Function: "addRole", Args: []string{string(idCert.GetCertificate()), role}}
chaincodeInputRaw, err := proto.Marshal(chaincodeInput)
if err != nil {
return err
}
// Access control:
// admCert signs admCert.GetCertificate() || chaincodeInputRaw || binding to confirm his identity
sigma, err := admCert.Sign(append(admCert.GetCertificate(), append(chaincodeInputRaw, binding...)...))
if err != nil {
return err
}
rbacMetadata := RBACMetadata{admCert.GetCertificate(), sigma}
rbacMetadataRaw, err := asn1.Marshal(rbacMetadata)
if err != nil {
return err
}
// Prepare spec and submit
spec := &pb.ChaincodeSpec{
Type: 1,
ChaincodeID: &pb.ChaincodeID{Name: "mycc"},
CtorMsg: chaincodeInput,
Metadata: rbacMetadataRaw, // Proof of identity
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
}