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exectransaction.go
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/
exectransaction.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 chaincode
import (
"errors"
"fmt"
"github.com/golang/protobuf/proto"
"golang.org/x/net/context"
"github.com/hyperledger/fabric/core/chaincode/shim"
"github.com/hyperledger/fabric/core/common/ccprovider"
"github.com/hyperledger/fabric/events/producer"
pb "github.com/hyperledger/fabric/protos/peer"
)
//Execute - execute proposal, return original response of chaincode
func Execute(ctxt context.Context, cccid *ccprovider.CCContext, spec interface{}) (*pb.Response, *pb.ChaincodeEvent, error) {
var err error
var cds *pb.ChaincodeDeploymentSpec
var ci *pb.ChaincodeInvocationSpec
//init will call the Init method of a on a chain
cctyp := pb.ChaincodeMessage_INIT
if cds, _ = spec.(*pb.ChaincodeDeploymentSpec); cds == nil {
if ci, _ = spec.(*pb.ChaincodeInvocationSpec); ci == nil {
panic("Execute should be called with deployment or invocation spec")
}
cctyp = pb.ChaincodeMessage_TRANSACTION
}
cID, cMsg, err := theChaincodeSupport.Launch(ctxt, cccid, spec)
if err != nil {
return nil, nil, fmt.Errorf("%s", err)
}
//this should work because it worked above...
chaincode := cID.Name
if err != nil {
return nil, nil, fmt.Errorf("Failed to stablish stream to container %s", chaincode)
}
if err != nil {
return nil, nil, fmt.Errorf("Failed to retrieve chaincode spec(%s)", err)
}
var ccMsg *pb.ChaincodeMessage
ccMsg, err = createCCMessage(cctyp, cccid.TxID, cMsg)
if err != nil {
return nil, nil, fmt.Errorf("Failed to transaction message(%s)", err)
}
resp, err := theChaincodeSupport.Execute(ctxt, cccid, ccMsg, theChaincodeSupport.executetimeout)
if err != nil {
// Rollback transaction
return nil, nil, fmt.Errorf("Failed to execute transaction (%s)", err)
} else if resp == nil {
// Rollback transaction
return nil, nil, fmt.Errorf("Failed to receive a response for (%s)", cccid.TxID)
}
if resp.ChaincodeEvent != nil {
resp.ChaincodeEvent.ChaincodeId = cccid.Name
resp.ChaincodeEvent.TxId = cccid.TxID
}
if resp.Type == pb.ChaincodeMessage_COMPLETED {
res := &pb.Response{}
unmarshalErr := proto.Unmarshal(resp.Payload, res)
if unmarshalErr != nil {
return nil, nil, fmt.Errorf("Failed to unmarshal response for (%s): %s", cccid.TxID, unmarshalErr)
}
// Success
return res, resp.ChaincodeEvent, nil
} else if resp.Type == pb.ChaincodeMessage_ERROR {
// Rollback transaction
return nil, resp.ChaincodeEvent, fmt.Errorf("Transaction returned with failure: %s", string(resp.Payload))
}
//TODO - this should never happen ... a panic is more appropriate but will save that for future
return nil, nil, fmt.Errorf("receive a response for (%s) but in invalid state(%d)", cccid.TxID, resp.Type)
}
// ExecuteWithErrorFilter is similar to Execute, but filters error contained in chaincode response and returns Payload of response only.
// Mostly used by unit-test.
func ExecuteWithErrorFilter(ctxt context.Context, cccid *ccprovider.CCContext, spec interface{}) ([]byte, *pb.ChaincodeEvent, error) {
res, event, err := Execute(ctxt, cccid, spec)
if err != nil {
chaincodeLogger.Errorf("ExecuteWithErrorFilter %s error: %s", cccid.Name, err)
return nil, nil, err
}
if res == nil {
chaincodeLogger.Errorf("ExecuteWithErrorFilter %s get nil response without error", cccid.Name)
return nil, nil, err
}
if res.Status != shim.OK {
return nil, nil, fmt.Errorf("%s", res.Message)
}
return res.Payload, event, nil
}
// GetSecureContext returns the security context from the context object or error
// Security context is nil if security is off from core.yaml file
// func GetSecureContext(ctxt context.Context) (crypto.Peer, error) {
// var err error
// temp := ctxt.Value("security")
// if nil != temp {
// if secCxt, ok := temp.(crypto.Peer); ok {
// return secCxt, nil
// }
// err = errors.New("Failed to convert security context type")
// }
// return nil, err
// }
var errFailedToGetChainCodeSpecForTransaction = errors.New("Failed to get ChainCodeSpec from Transaction")
func sendTxRejectedEvent(tx *pb.Transaction, errorMsg string) {
producer.Send(producer.CreateRejectionEvent(tx, errorMsg))
}