-
Notifications
You must be signed in to change notification settings - Fork 176
/
convert.go
164 lines (147 loc) · 5 KB
/
convert.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
package protocol
import (
"fmt"
"github.com/onflow/flow-go/crypto"
"github.com/onflow/flow-go/model/flow"
"github.com/onflow/flow-go/model/flow/filter"
)
// ToEpochSetup converts an Epoch interface instance to the underlying
// concrete epoch setup service event.
func ToEpochSetup(epoch Epoch) (*flow.EpochSetup, error) {
counter, err := epoch.Counter()
if err != nil {
return nil, fmt.Errorf("could not get epoch counter: %w", err)
}
firstView, err := epoch.FirstView()
if err != nil {
return nil, fmt.Errorf("could not get epoch first view: %w", err)
}
finalView, err := epoch.FinalView()
if err != nil {
return nil, fmt.Errorf("could not get epoch final view: %w", err)
}
dkgPhase1FinalView, dkgPhase2FinalView, dkgPhase3FinalView, err := DKGPhaseViews(epoch)
if err != nil {
return nil, fmt.Errorf("could not get epoch dkg final views: %w", err)
}
participants, err := epoch.InitialIdentities()
if err != nil {
return nil, fmt.Errorf("could not get epoch participants: %w", err)
}
clustering, err := epoch.Clustering()
if err != nil {
return nil, fmt.Errorf("could not get epoch clustering: %w", err)
}
assignments := clustering.Assignments()
randomSource, err := epoch.RandomSource()
if err != nil {
return nil, fmt.Errorf("could not get epoch random source: %w", err)
}
setup := &flow.EpochSetup{
Counter: counter,
FirstView: firstView,
DKGPhase1FinalView: dkgPhase1FinalView,
DKGPhase2FinalView: dkgPhase2FinalView,
DKGPhase3FinalView: dkgPhase3FinalView,
FinalView: finalView,
Participants: participants,
Assignments: assignments,
RandomSource: randomSource,
}
return setup, nil
}
// ToEpochCommit converts an Epoch interface instance to the underlying
// concrete epoch commit service event. The epoch must have been committed.
func ToEpochCommit(epoch Epoch) (*flow.EpochCommit, error) {
counter, err := epoch.Counter()
if err != nil {
return nil, fmt.Errorf("could not get epoch counter: %w", err)
}
clustering, err := epoch.Clustering()
if err != nil {
return nil, fmt.Errorf("could not get epoch clustering: %w", err)
}
qcs := make([]*flow.QuorumCertificate, 0, len(clustering))
for i := range clustering {
cluster, err := epoch.Cluster(uint(i))
if err != nil {
return nil, fmt.Errorf("could not get epoch cluster (index=%d): %w", i, err)
}
qcs = append(qcs, cluster.RootQC())
}
participants, err := epoch.InitialIdentities()
if err != nil {
return nil, fmt.Errorf("could not get epoch participants: %w", err)
}
dkg, err := epoch.DKG()
if err != nil {
return nil, fmt.Errorf("could not get epoch dkg: %w", err)
}
dkgParticipantKeys, err := GetDKGParticipantKeys(dkg, participants.Filter(filter.IsValidDKGParticipant))
if err != nil {
return nil, fmt.Errorf("could not get dkg participant keys: %w", err)
}
commit := &flow.EpochCommit{
Counter: counter,
ClusterQCs: flow.ClusterQCVoteDatasFromQCs(qcs),
DKGGroupKey: dkg.GroupKey(),
DKGParticipantKeys: dkgParticipantKeys,
}
return commit, nil
}
// GetDKGParticipantKeys retrieves the canonically ordered list of DKG
// participant keys from the DKG.
func GetDKGParticipantKeys(dkg DKG, participants flow.IdentityList) ([]crypto.PublicKey, error) {
keys := make([]crypto.PublicKey, 0, len(participants))
for i, identity := range participants {
index, err := dkg.Index(identity.NodeID)
if err != nil {
return nil, fmt.Errorf("could not get index (node=%x): %w", identity.NodeID, err)
}
key, err := dkg.KeyShare(identity.NodeID)
if err != nil {
return nil, fmt.Errorf("could not get key share (node=%x): %w", identity.NodeID, err)
}
if uint(i) != index {
return nil, fmt.Errorf("participant list index (%d) does not match dkg index (%d)", i, index)
}
keys = append(keys, key)
}
return keys, nil
}
// ToDKGParticipantLookup computes the nodeID -> DKGParticipant lookup for a
// DKG instance. The participants must exactly match the DKG instance configuration.
func ToDKGParticipantLookup(dkg DKG, participants flow.IdentityList) (map[flow.Identifier]flow.DKGParticipant, error) {
lookup := make(map[flow.Identifier]flow.DKGParticipant)
for _, identity := range participants {
index, err := dkg.Index(identity.NodeID)
if err != nil {
return nil, fmt.Errorf("could not get index (node=%x): %w", identity.NodeID, err)
}
key, err := dkg.KeyShare(identity.NodeID)
if err != nil {
return nil, fmt.Errorf("could not get key share (node=%x): %w", identity.NodeID, err)
}
lookup[identity.NodeID] = flow.DKGParticipant{
Index: index,
KeyShare: key,
}
}
return lookup, nil
}
// DKGPhaseViews returns the DKG final phase views for an epoch.
func DKGPhaseViews(epoch Epoch) (phase1FinalView uint64, phase2FinalView uint64, phase3FinalView uint64, err error) {
phase1FinalView, err = epoch.DKGPhase1FinalView()
if err != nil {
return
}
phase2FinalView, err = epoch.DKGPhase2FinalView()
if err != nil {
return
}
phase3FinalView, err = epoch.DKGPhase3FinalView()
if err != nil {
return
}
return
}