/
sr2.go
188 lines (165 loc) · 4.8 KB
/
sr2.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
package sr2
import (
"context"
"encoding/json"
"fmt"
"io/ioutil"
"math/rand"
"net/http"
"time"
"github.com/filecoin-project/go-address"
"github.com/filecoin-project/go-fil-markets/storagemarket"
"github.com/filecoin-project/lotus/api/apistruct"
"github.com/filecoin-project/lotus/chain/types"
logger "github.com/ipfs/go-log/v2"
"github.com/textileio/powergate/ffs"
"github.com/textileio/powergate/lotus"
)
const (
maxSR2Price = 100_000_000_000
)
var (
log = logger.Logger("sr2-miner-selector")
)
// MinerSelector chooses miner under SR2 strategy.
type MinerSelector struct {
url string
cb lotus.ClientBuilder
}
var _ ffs.MinerSelector = (*MinerSelector)(nil)
type minersBuckets struct {
Buckets []bucket
}
type bucket struct {
Amount int
MinerAddresses []string
}
// New returns a new SR2 miner selector.
func New(url string, cb lotus.ClientBuilder) (*MinerSelector, error) {
ms := &MinerSelector{url: url, cb: cb}
_, err := ms.getMiners()
if err != nil {
return nil, fmt.Errorf("verifying sr2 url content: %s", err)
}
return ms, nil
}
// GetMiners returns miners from SR2.
func (ms *MinerSelector) GetMiners(n int, f ffs.MinerSelectorFilter) ([]ffs.MinerProposal, error) {
mb, err := ms.getMiners()
if err != nil {
return nil, fmt.Errorf("getting miners from url: %s", err)
}
c, cls, err := ms.cb(context.Background())
if err != nil {
return nil, fmt.Errorf("creating lotus client: %s", err)
}
defer cls()
rand.Seed(time.Now().UnixNano())
var selected []ffs.MinerProposal
for _, bucket := range mb.Buckets {
miners := bucket.MinerAddresses
rand.Shuffle(len(miners), func(i, j int) { miners[i], miners[j] = miners[j], miners[i] })
// Stay safe.
if bucket.Amount < 0 {
bucket.Amount = 0
}
if bucket.Amount > len(miners) {
bucket.Amount = len(miners)
}
var regionSelected int
for i := 0; regionSelected < bucket.Amount && i < len(miners); i++ {
sask, err := getMinerQueryAsk(c, miners[i])
if err != nil {
log.Warnf("sr2 miner %s query-ask errored: %s", miners[i], err)
continue
}
if sask.Price.Uint64() > maxSR2Price {
log.Warnf("skipping miner %s since has price %d above maximum allowed for SR2", miners[i], sask.Price)
continue
}
if f.MaxPrice > 0 && sask.Price.Uint64() > f.MaxPrice {
log.Warnf("skipping miner %s with price %d higher than max-price %d", miners[i], sask.Price, f.MaxPrice)
continue
}
if f.PieceSize < uint64(sask.MinPieceSize) || f.PieceSize > uint64(sask.MaxPieceSize) {
log.Warnf("skipping miner %s since needed piece size %d doesn't fit bounds (%d, %d)", miners[i], f.PieceSize, sask.MinPieceSize, sask.MaxPieceSize)
}
selected = append(selected, ffs.MinerProposal{
Addr: miners[i],
EpochPrice: sask.Price.Uint64(),
})
regionSelected++
}
}
if len(selected) == 0 {
return nil, fmt.Errorf("no SR2 miners are available")
}
return selected, nil
}
// GetReplicationFactor returns the current replication factor of the
// remote configuration.
func (ms *MinerSelector) GetReplicationFactor() (int, error) {
mb, err := ms.getMiners()
if err != nil {
return 0, fmt.Errorf("getting sr2 miners: %s", err)
}
var repFactor int
for _, b := range mb.Buckets {
repFactor += b.Amount
}
return repFactor, nil
}
func (ms *MinerSelector) getMiners() (minersBuckets, error) {
r, err := http.DefaultClient.Get(ms.url)
if err != nil {
return minersBuckets{}, fmt.Errorf("getting miners list from url: %s", err)
}
defer func() {
if err := r.Body.Close(); err != nil {
log.Warnf("closing request body from sr2 file: %s", err)
}
}()
content, err := ioutil.ReadAll(r.Body)
if err != nil {
return minersBuckets{}, fmt.Errorf("reading body: %s", err)
}
var res minersBuckets
if err := json.Unmarshal(content, &res); err != nil {
return minersBuckets{}, fmt.Errorf("unmarshaling url contents: %s", err)
}
return res, nil
}
func getMinerQueryAsk(c *apistruct.FullNodeStruct, addrStr string) (*storagemarket.StorageAsk, error) {
addr, err := address.NewFromString(addrStr)
if err != nil {
return nil, fmt.Errorf("miner address is invalid: %s", err)
}
ctx, cls := context.WithTimeout(context.Background(), time.Second*10)
defer cls()
mi, err := c.StateMinerInfo(ctx, addr, types.EmptyTSK)
if err != nil {
return nil, fmt.Errorf("getting miner %s info: %s", addr, err)
}
type chAskRes struct {
Error string
Ask *storagemarket.StorageAsk
}
chAsk := make(chan chAskRes)
go func() {
sask, err := c.ClientQueryAsk(ctx, *mi.PeerId, addr)
if err != nil {
chAsk <- chAskRes{Error: err.Error()}
return
}
chAsk <- chAskRes{Ask: sask}
}()
select {
case <-time.After(time.Second * 10):
return nil, fmt.Errorf("query asking timed out")
case r := <-chAsk:
if r.Error != "" {
return nil, fmt.Errorf("query ask had controlled error: %s", r.Error)
}
return r.Ask, nil
}
}