// SendProducerBlockEvent sends block event to clients
func SendProducerBlockEvent(block *common.Block) error {
bevent := &common.Block{}
bevent.Header = block.Header
bevent.Metadata = block.Metadata
bevent.Data = &common.BlockData{}
for _, d := range block.Data.Data {
if d != nil {
if env, err := utils.GetEnvelopeFromBlock(d); err != nil {
logger.Errorf("Error getting tx from block(%s)\n", err)
} else if env != nil {
// get the payload from the envelope
payload, err := utils.GetPayload(env)
if err != nil {
return fmt.Errorf("Could not extract payload from envelope, err %s", err)
}
if common.HeaderType(payload.Header.ChainHeader.Type) == common.HeaderType_ENDORSER_TRANSACTION {
tx, err := utils.GetTransaction(payload.Data)
if err != nil {
logger.Errorf("Error unmarshalling transaction payload for block event: %s", err)
continue
}
chaincodeActionPayload := &pb.ChaincodeActionPayload{}
err = proto.Unmarshal(tx.Actions[0].Payload, chaincodeActionPayload)
if err != nil {
logger.Errorf("Error unmarshalling transaction action payload for block event: %s", err)
continue
}
propRespPayload := &pb.ProposalResponsePayload{}
err = proto.Unmarshal(chaincodeActionPayload.Action.ProposalResponsePayload, propRespPayload)
if err != nil {
logger.Errorf("Error unmarshalling proposal response payload for block event: %s", err)
continue
}
//ENDORSER_ACTION, ProposalResponsePayload.Extension field contains ChaincodeAction
caPayload := &pb.ChaincodeAction{}
err = proto.Unmarshal(propRespPayload.Extension, caPayload)
if err != nil {
logger.Errorf("Error unmarshalling chaincode action for block event: %s", err)
continue
}
// Drop read write set from transaction before sending block event
caPayload.Results = nil
propRespPayload.Extension, err = proto.Marshal(caPayload)
if err != nil {
logger.Errorf("Error marshalling tx proposal extension payload for block event: %s", err)
continue
}
// Marshal Transaction again and append to block to be sent
chaincodeActionPayload.Action.ProposalResponsePayload, err = proto.Marshal(propRespPayload)
if err != nil {
logger.Errorf("Error marshalling tx proposal payload for block event: %s", err)
continue
}
tx.Actions[0].Payload, err = proto.Marshal(chaincodeActionPayload)
if err != nil {
logger.Errorf("Error marshalling tx action payload for block event: %s", err)
continue
}
if t, err := proto.Marshal(tx); err == nil {
bevent.Data.Data = append(bevent.Data.Data, t)
logger.Infof("calling sendProducerBlockEvent\n")
} else {
logger.Infof("Cannot marshal transaction %s\n", err)
}
}
}
}
}
return Send(CreateBlockEvent(bevent))
}
func (d *DeliverService) readUntilClose() {
for {
msg, err := d.client.Recv()
if err != nil {
logger.Warningf("Receive error: %s", err.Error())
return
}
switch t := msg.Type.(type) {
case *orderer.DeliverResponse_Error:
if t.Error == common.Status_SUCCESS {
logger.Warning("ERROR! Received success in error field")
return
}
logger.Warning("Got error ", t)
case *orderer.DeliverResponse_Block:
seqNum := t.Block.Header.Number
block := &common.Block{}
block.Header = t.Block.Header
// Copy and initialize peer metadata
putils.CopyBlockMetadata(t.Block, block)
block.Data = &common.BlockData{}
for _, d := range t.Block.Data.Data {
if d != nil {
if env, err := putils.GetEnvelopeFromBlock(d); err != nil {
fmt.Printf("Error getting tx from block(%s)\n", err)
} else if env != nil {
// validate the transaction: here we check that the transaction
// is properly formed, properly signed and that the security
// chain binding proposal to endorsements to tx holds. We do
// NOT check the validity of endorsements, though. That's a
// job for VSCC below
payload, _, err := peer.ValidateTransaction(env)
if err != nil {
// TODO: this code needs to receive a bit more attention and discussion:
// it's not clear what it means if a transaction which causes a failure
// in validation is just dropped on the floor
logger.Errorf("Invalid transaction, error %s", err)
} else {
//the payload is used to get headers
err = isTxValidForVscc(payload, d)
if err != nil {
// TODO: this code needs to receive a bit more attention and discussion:
// it's not clear what it means if a transaction which causes a failure
// in validation is just dropped on the floor
logger.Errorf("isTxValidForVscc returned error %s", err)
continue
}
if t, err := proto.Marshal(env); err == nil {
block.Data.Data = append(block.Data.Data, t)
} else {
fmt.Printf("Cannot marshal transactoins %s\n", err)
}
}
} else {
logger.Warning("Nil tx from block")
}
}
}
numberOfPeers := len(service.GetGossipService().GetPeers())
// Create payload with a block received
payload := createPayload(seqNum, block)
// Use payload to create gossip message
gossipMsg := createGossipMsg(payload)
logger.Debugf("Adding payload locally, buffer seqNum = [%d], peers number [%d]", seqNum, numberOfPeers)
// Add payload to local state payloads buffer
service.GetGossipService().AddPayload(d.chainID, payload)
// Gossip messages with other nodes
logger.Debugf("Gossiping block [%d], peers number [%d]", seqNum, numberOfPeers)
service.GetGossipService().Gossip(gossipMsg)
if err = producer.SendProducerBlockEvent(block); err != nil {
logger.Errorf("Error sending block event %s", err)
}
d.unAcknowledged++
if d.unAcknowledged >= d.windowSize/2 {
logger.Warningf("Sending acknowledgement [%d]", t.Block.Header.Number)
err = d.client.Send(&orderer.DeliverUpdate{
Type: &orderer.DeliverUpdate_Acknowledgement{
Acknowledgement: &orderer.Acknowledgement{
Number: seqNum,
},
},
})
if err != nil {
return
}
d.unAcknowledged = 0
}
default:
logger.Warning("Received unknown: ", t)
return
}
}
}