-
Notifications
You must be signed in to change notification settings - Fork 8.8k
/
blocksprovider.go
230 lines (191 loc) · 7 KB
/
blocksprovider.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
/*
Copyright IBM Corp. 2017 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 blocksprovider
import (
"math"
"time"
"sync/atomic"
"github.com/golang/protobuf/proto"
gossipcommon "github.com/hyperledger/fabric/gossip/common"
"github.com/hyperledger/fabric/gossip/discovery"
"github.com/hyperledger/fabric/common/flogging"
"github.com/hyperledger/fabric/gossip/api"
"github.com/hyperledger/fabric/protos/common"
gossip_proto "github.com/hyperledger/fabric/protos/gossip"
"github.com/hyperledger/fabric/protos/orderer"
"github.com/op/go-logging"
)
// LedgerInfo an adapter to provide the interface to query
// the ledger committer for current ledger height
type LedgerInfo interface {
// LedgerHeight returns current local ledger height
LedgerHeight() (uint64, error)
}
// GossipServiceAdapter serves to provide basic functionality
// required from gossip service by delivery service
type GossipServiceAdapter interface {
// PeersOfChannel returns slice with members of specified channel
PeersOfChannel(gossipcommon.ChainID) []discovery.NetworkMember
// AddPayload adds payload to the local state sync buffer
AddPayload(chainID string, payload *gossip_proto.Payload) error
// Gossip the message across the peers
Gossip(msg *gossip_proto.GossipMessage)
}
// BlocksProvider used to read blocks from the ordering service
// for specified chain it subscribed to
type BlocksProvider interface {
// DeliverBlocks starts delivering and disseminating blocks
DeliverBlocks()
// Stop shutdowns blocks provider and stops delivering new blocks
Stop()
}
// BlocksDeliverer defines interface which actually helps
// to abstract the AtomicBroadcast_DeliverClient with only
// required method for blocks provider.
// This also decouples the production implementation of the gRPC stream
// from the code in order for the code to be more modular and testable.
type BlocksDeliverer interface {
// Recv retrieves a response from the ordering service
Recv() (*orderer.DeliverResponse, error)
// Send sends an envelope to the ordering service
Send(*common.Envelope) error
}
type streamClient interface {
BlocksDeliverer
// Close closes the stream and its underlying connection
Close()
// Disconnect disconnects from the remote node
Disconnect()
}
// blocksProviderImpl the actual implementation for BlocksProvider interface
type blocksProviderImpl struct {
chainID string
client streamClient
gossip GossipServiceAdapter
mcs api.MessageCryptoService
done int32
wrongStatusThreshold int
}
const wrongStatusThreshold = 10
var MaxRetryDelay = time.Second * 10
var logger *logging.Logger // package-level logger
func init() {
logger = flogging.MustGetLogger("blocksProvider")
}
// NewBlocksProvider constructor function to create blocks deliverer instance
func NewBlocksProvider(chainID string, client streamClient, gossip GossipServiceAdapter, mcs api.MessageCryptoService) BlocksProvider {
return &blocksProviderImpl{
chainID: chainID,
client: client,
gossip: gossip,
mcs: mcs,
wrongStatusThreshold: wrongStatusThreshold,
}
}
// DeliverBlocks used to pull out blocks from the ordering service to
// distributed them across peers
func (b *blocksProviderImpl) DeliverBlocks() {
errorStatusCounter := 0
statusCounter := 0
defer b.client.Close()
for !b.isDone() {
msg, err := b.client.Recv()
if err != nil {
logger.Warningf("[%s] Receive error: %s", b.chainID, err.Error())
return
}
switch t := msg.Type.(type) {
case *orderer.DeliverResponse_Status:
if t.Status == common.Status_SUCCESS {
logger.Warningf("[%s] ERROR! Received success for a seek that should never complete", b.chainID)
return
}
if t.Status == common.Status_BAD_REQUEST || t.Status == common.Status_FORBIDDEN {
logger.Errorf("[%s] Got error %v", b.chainID, t)
errorStatusCounter++
if errorStatusCounter > b.wrongStatusThreshold {
logger.Criticalf("[%s] Wrong statuses threshold passed, stopping block provider", b.chainID)
return
}
} else {
errorStatusCounter = 0
logger.Warningf("[%s] Got error %v", b.chainID, t)
}
maxDelay := float64(MaxRetryDelay)
currDelay := float64(time.Duration(math.Pow(2, float64(statusCounter))) * 100 * time.Millisecond)
time.Sleep(time.Duration(math.Min(maxDelay, currDelay)))
if currDelay < maxDelay {
statusCounter++
}
b.client.Disconnect()
continue
case *orderer.DeliverResponse_Block:
errorStatusCounter = 0
statusCounter = 0
seqNum := t.Block.Header.Number
marshaledBlock, err := proto.Marshal(t.Block)
if err != nil {
logger.Errorf("[%s] Error serializing block with sequence number %d, due to %s", b.chainID, seqNum, err)
continue
}
if err := b.mcs.VerifyBlock(gossipcommon.ChainID(b.chainID), seqNum, marshaledBlock); err != nil {
logger.Errorf("[%s] Error verifying block with sequnce number %d, due to %s", b.chainID, seqNum, err)
continue
}
numberOfPeers := len(b.gossip.PeersOfChannel(gossipcommon.ChainID(b.chainID)))
// Create payload with a block received
payload := createPayload(seqNum, marshaledBlock)
// Use payload to create gossip message
gossipMsg := createGossipMsg(b.chainID, payload)
logger.Debugf("[%s] Adding payload locally, buffer seqNum = [%d], peers number [%d]", b.chainID, seqNum, numberOfPeers)
// Add payload to local state payloads buffer
if err := b.gossip.AddPayload(b.chainID, payload); err != nil {
logger.Warning("Failed adding payload of", seqNum, "because:", err)
}
// Gossip messages with other nodes
logger.Debugf("[%s] Gossiping block [%d], peers number [%d]", b.chainID, seqNum, numberOfPeers)
b.gossip.Gossip(gossipMsg)
default:
logger.Warningf("[%s] Received unknown: ", b.chainID, t)
return
}
}
}
// Stop stops blocks delivery provider
func (b *blocksProviderImpl) Stop() {
atomic.StoreInt32(&b.done, 1)
b.client.Close()
}
// Check whenever provider is stopped
func (b *blocksProviderImpl) isDone() bool {
return atomic.LoadInt32(&b.done) == 1
}
func createGossipMsg(chainID string, payload *gossip_proto.Payload) *gossip_proto.GossipMessage {
gossipMsg := &gossip_proto.GossipMessage{
Nonce: 0,
Tag: gossip_proto.GossipMessage_CHAN_AND_ORG,
Channel: []byte(chainID),
Content: &gossip_proto.GossipMessage_DataMsg{
DataMsg: &gossip_proto.DataMessage{
Payload: payload,
},
},
}
return gossipMsg
}
func createPayload(seqNum uint64, marshaledBlock []byte) *gossip_proto.Payload {
return &gossip_proto.Payload{
Data: marshaledBlock,
SeqNum: seqNum,
}
}