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
|
// Copyright (C) 2019-2023 Algorand, Inc.
// This file is part of go-algorand
//
// go-algorand is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// go-algorand is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with go-algorand. If not, see <https://www.gnu.org/licenses/>.
package stateproof
import (
"context"
"database/sql"
"errors"
"time"
"github.com/algorand/go-algorand/config"
"github.com/algorand/go-algorand/crypto/merklesignature"
"github.com/algorand/go-algorand/data/account"
"github.com/algorand/go-algorand/data/basics"
"github.com/algorand/go-algorand/data/stateproofmsg"
"github.com/algorand/go-algorand/protocol"
)
// sigFromAddr encapsulates a signature on a block header, which
// will eventually be used to form a state proof for that
// block.
type sigFromAddr struct {
_struct struct{} `codec:",omitempty,omitemptyarray"`
SignerAddress basics.Address `codec:"a"`
Round basics.Round `codec:"r"`
Sig merklesignature.Signature `codec:"s"`
}
func (spw *Worker) signer(latest basics.Round) {
nextRnd := spw.nextStateProofRound(latest)
for { // Start signing StateProofs from nextRnd onwards
select {
case <-spw.ledger.Wait(nextRnd):
spw.signStateProof(nextRnd)
spw.invokeBuilder(nextRnd)
nextRnd++
case <-spw.ctx.Done():
spw.wg.Done()
return
}
}
}
func (spw *Worker) nextStateProofRound(latest basics.Round) basics.Round {
var nextrnd basics.Round
for {
latestHdr, err := spw.ledger.BlockHdr(latest)
if err != nil {
spw.log.Warnf("spw.signer(): BlockHdr(latest %d): %v", latest, err)
time.Sleep(1 * time.Second)
latest = spw.ledger.Latest()
continue
}
nextrnd = latestHdr.StateProofTracking[protocol.StateProofBasic].StateProofNextRound
if nextrnd == 0 {
// State proofs are not enabled yet. Keep monitoring new blocks.
nextrnd = latest + 1
}
break
}
return nextrnd
}
func (spw *Worker) signStateProof(round basics.Round) {
proto, err := spw.getProto(round)
if err != nil {
spw.log.Warnf("spw.signStateProof(%d): getProto: %v", round, err)
return
}
if proto.StateProofInterval == 0 {
return
}
// Only sign blocks that are a multiple of StateProofInterval.
if round%basics.Round(proto.StateProofInterval) != 0 {
return
}
keys := spw.accts.StateProofKeys(round)
if len(keys) == 0 {
// No keys, nothing to do.
return
}
stateProofMessage, err := spw.getStateProofMessage(round)
if err != nil {
spw.log.Warnf("spw.signStateProof(%d): getStateProofMessage: %v", round, err)
return
}
spw.signStateProofMessage(&stateProofMessage, round, keys)
}
func (spw *Worker) getProto(round basics.Round) (*config.ConsensusParams, error) {
protoHdr, err := spw.ledger.BlockHdr(round)
if err != nil {
// IMPORTANT: This doesn't support modification of the state proof interval at the moment. Actually supporting
// it will probably require using (and slightly modifying) the stateProofVerificationTracker.
latestRound := spw.ledger.Latest()
protoHdr, err = spw.ledger.BlockHdr(latestRound)
if err != nil {
return nil, err
}
}
proto := config.Consensus[protoHdr.CurrentProtocol]
return &proto, nil
}
func (spw *Worker) getStateProofMessage(round basics.Round) (stateproofmsg.Message, error) {
var msg stateproofmsg.Message
err := spw.db.Atomic(func(ctx context.Context, tx *sql.Tx) (err error) {
msg, err = getMessage(tx, round)
return err
})
if err == nil {
return msg, nil
}
if !errors.Is(err, sql.ErrNoRows) {
spw.log.Errorf("getStateProofMessage(%d): error while fetching prover from DB: %v", round, err)
}
return GenerateStateProofMessage(spw.ledger, round)
}
func (spw *Worker) signStateProofMessage(message *stateproofmsg.Message, round basics.Round, keys []account.StateProofSecretsForRound) {
hashedStateproofMessage := message.Hash()
sigs := make([]sigFromAddr, 0, len(keys))
for _, key := range keys {
if key.FirstValid > round || round > key.LastValid {
continue
}
if key.StateProofSecrets == nil {
spw.log.Warnf("spw.signStateProofMessage(%d): empty state proof secrets for round", round)
continue
}
var exists bool
err := spw.db.Atomic(func(ctx context.Context, tx *sql.Tx) (err error) {
exists, err = sigExistsInDB(tx, round, key.Account)
return err
})
if err != nil {
spw.log.Warnf("spw.signStateProofMessage(%d): couldn't figure if sig exists in DB: %v", round, err)
} else if exists {
continue
}
sig, err := key.StateProofSecrets.SignBytes(hashedStateproofMessage[:])
if err != nil {
spw.log.Warnf("spw.signStateProofMessage(%d): StateProofSecrets.Sign: %v", round, err)
continue
}
sigs = append(sigs, sigFromAddr{
SignerAddress: key.Account,
Round: round,
Sig: sig,
})
}
// any error in handle sig indicates the signature wasn't stored in disk, thus we cannot delete the key.
for _, sfa := range sigs {
if _, err := spw.handleSig(sfa, nil); err != nil {
spw.log.Warnf("spw.signStateProofMessage(%d): handleSig: %v", round, err)
continue
}
spw.log.Infof("spw.signStateProofMessage(%d): sp message was signed with address %v", round, sfa.SignerAddress)
}
}
|
