-
Notifications
You must be signed in to change notification settings - Fork 0
/
order_deliver.go
206 lines (182 loc) · 5.34 KB
/
order_deliver.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
/*
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 client
import (
"bufio"
"bytes"
"context"
"fmt"
"github.com/hyperledger/fabric/common/flogging"
"github.com/hyperledger/fabric/common/localmsp"
"github.com/hyperledger/fabric/common/tools/protolator"
"github.com/hyperledger/fabric/core/comm"
mspmgmt "github.com/hyperledger/fabric/msp/mgmt"
ordererConfig "github.com/hyperledger/fabric/orderer/common/localconfig"
"github.com/hyperledger/fabric/protos/common"
ab "github.com/hyperledger/fabric/protos/orderer"
"github.com/hyperledger/fabric/protos/utils"
"github.com/pkg/errors"
"time"
)
var logger = flogging.MustGetLogger("client")
type deliverClientIntf interface {
getSpecifiedBlock(num uint64) (*common.Block, error)
getOldestBlock() (*common.Block, error)
getNewestBlock() (*common.Block, error)
Close() error
}
type DeliverClient struct {
client ab.AtomicBroadcast_DeliverClient
chainID string
tlsCertHash []byte
}
func NewDeliverClient(chainID string) (*DeliverClient, error) {
config, err := initConfig()
if err != nil {
return nil, err
}
clientConfig := comm.ClientConfig{}
clientConfig.Timeout = time.Second * 3
gClient, err := comm.NewGRPCClient(clientConfig)
address := fmt.Sprintf("%s:%d", config.General.ListenAddress, config.General.ListenPort)
conn, err := gClient.NewConnection(address, "")
if err != nil {
return nil, err
}
dc, err := ab.NewAtomicBroadcastClient(conn).Deliver(context.TODO())
if err != nil {
return nil, errors.WithMessage(err, "failed to create deliver client")
}
return &DeliverClient{client: dc, chainID: chainID}, nil
}
func seekHelper(
chainID string,
position *ab.SeekPosition,
tlsCertHash []byte,
) *common.Envelope {
seekInfo := &ab.SeekInfo{
Start: position,
Stop: position,
Behavior: ab.SeekInfo_BLOCK_UNTIL_READY,
}
env, err := utils.CreateSignedEnvelopeWithTLSBinding(
common.HeaderType_CONFIG_UPDATE, chainID, localmsp.NewSigner(),
seekInfo, int32(0), uint64(0), tlsCertHash)
if err != nil {
logger.Errorf("Error signing envelope: %s", err)
return nil
}
return env
}
func (r *DeliverClient) seekSpecified(blockNumber uint64) error {
return r.client.Send(seekHelper(r.chainID, &ab.SeekPosition{
Type: &ab.SeekPosition_Specified{
Specified: &ab.SeekSpecified{
Number: blockNumber}}}, r.tlsCertHash))
}
func (r *DeliverClient) seekOldest() error {
return r.client.Send(seekHelper(r.chainID,
&ab.SeekPosition{Type: &ab.SeekPosition_Oldest{
Oldest: &ab.SeekOldest{}}}, r.tlsCertHash))
}
func (r *DeliverClient) seekNewest() error {
return r.client.Send(seekHelper(r.chainID,
&ab.SeekPosition{Type: &ab.SeekPosition_Newest{
Newest: &ab.SeekNewest{}}}, r.tlsCertHash))
}
func (r *DeliverClient) readBlock() (*common.Block, error) {
msg, err := r.client.Recv()
if err != nil {
return nil, fmt.Errorf("Error receiving: %s", err)
}
switch t := msg.Type.(type) {
case *ab.DeliverResponse_Status:
logger.Debugf("Got status: %v", t)
return nil, fmt.Errorf("can't read the block: %v", t)
case *ab.DeliverResponse_Block:
logger.Debugf("Received block: %v", t.Block.Header.Number)
r.client.Recv() // Flush the success message
return t.Block, nil
default:
return nil, fmt.Errorf("response error: unknown type %T", t)
}
}
func (r *DeliverClient) GetSpecifiedBlock(num uint64) (string, error) {
err := r.seekSpecified(num)
if err != nil {
logger.Errorf("Received error: %s", err)
return "", err
}
var b bytes.Buffer
writer := bufio.NewWriter(&b)
block, err := r.readBlock()
if err != nil {
return "", err
}
protolator.DeepMarshalJSON(writer, block)
if err != nil {
return "", err
}
return string(b.Bytes()), nil
}
func (r *DeliverClient) GetOldestBlock() (string, error) {
err := r.seekOldest()
if err != nil {
logger.Errorf("Received error: %s", err)
return "", err
}
var b bytes.Buffer
writer := bufio.NewWriter(&b)
block, err := r.readBlock()
if err != nil {
return "", err
}
protolator.DeepMarshalJSON(writer, block)
if err != nil {
return "", err
}
return string(b.Bytes()), nil
}
func (r *DeliverClient) GetNewestBlock() (string, error) {
err := r.seekNewest()
if err != nil {
logger.Errorf("Received error: %s", err)
return "", err
}
var b bytes.Buffer
writer := bufio.NewWriter(&b)
block, err := r.readBlock()
if err != nil {
return "", err
}
protolator.DeepMarshalJSON(writer, block)
if err != nil {
return "", err
}
return string(b.Bytes()), nil
}
func (r *DeliverClient) Close() error {
return r.client.CloseSend()
}
func initConfig() (*ordererConfig.TopLevel, error) {
config, err := ordererConfig.Load()
if err != nil {
return nil, err
}
// Load local MSP
err = mspmgmt.LoadLocalMsp(config.General.LocalMSPDir, config.General.BCCSP, config.General.LocalMSPID)
if err != nil { // Handle errors reading the config file
return nil, err
}
return config, nil
}