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gossip_block_handler.go
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/
gossip_block_handler.go
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/*
Copyright IBM Corp. All Rights Reserved.
SPDX-License-Identifier: Apache-2.0
*/
package deliverservice
import (
"github.com/ZihuaZhang/fabric-protos-go/common"
"github.com/ZihuaZhang/fabric-protos-go/gossip"
"github.com/ZihuaZhang/fabric/common/flogging"
"github.com/golang/protobuf/proto"
"github.com/pkg/errors"
)
// GossipServiceAdapter serves to provide basic functionality
// required from gossip service by delivery service
//
//go:generate counterfeiter -o fake/gossip_service_adapter.go --fake-name GossipServiceAdapter . GossipServiceAdapter
type GossipServiceAdapter interface {
// AddPayload adds payload to the local state sync buffer
AddPayload(chainID string, payload *gossip.Payload) error
// Gossip the message across the peers
Gossip(msg *gossip.GossipMessage)
}
type GossipBlockHandler struct {
gossip GossipServiceAdapter
blockGossipDisabled bool
logger *flogging.FabricLogger
}
func (h *GossipBlockHandler) HandleBlock(channelID string, block *common.Block) error {
marshaledBlock, err := proto.Marshal(block)
if err != nil {
return errors.WithMessage(err, "block from orderer could not be re-marshaled")
}
// Create payload with a block received
blockNum := block.GetHeader().GetNumber()
payload := &gossip.Payload{
Data: marshaledBlock,
SeqNum: blockNum,
}
// Use payload to create gossip message
gossipMsg := &gossip.GossipMessage{
Nonce: 0,
Tag: gossip.GossipMessage_CHAN_AND_ORG,
Channel: []byte(channelID),
Content: &gossip.GossipMessage_DataMsg{
DataMsg: &gossip.DataMessage{
Payload: payload,
},
},
}
h.logger.Debugf("Adding payload to local buffer, blockNum = [%d]", blockNum)
// Add payload to local state payloads buffer
if err := h.gossip.AddPayload(channelID, payload); err != nil {
h.logger.Warningf("Block [%d] received from ordering service wasn't added to payload buffer: %v", blockNum, err)
return errors.WithMessage(err, "could not add block as payload")
}
if h.blockGossipDisabled {
return nil
}
// Gossip messages with other nodes
h.logger.Debugf("Gossiping block [%d]", blockNum)
h.gossip.Gossip(gossipMsg)
return nil
}