-
Notifications
You must be signed in to change notification settings - Fork 1.3k
/
export.go
132 lines (109 loc) · 2.75 KB
/
export.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
package main
import (
"context"
"fmt"
"io"
"os"
"github.com/urfave/cli/v2"
"golang.org/x/xerrors"
"github.com/filecoin-project/go-state-types/abi"
"github.com/filecoin-project/lotus/chain/store"
"github.com/filecoin-project/lotus/chain/types"
lcli "github.com/filecoin-project/lotus/cli"
"github.com/filecoin-project/lotus/node/repo"
)
var exportChainCmd = &cli.Command{
Name: "export",
Description: "Export chain from repo (requires node to be offline)",
Flags: []cli.Flag{
&cli.StringFlag{
Name: "repo",
Value: "~/.lotus",
},
&cli.StringFlag{
Name: "tipset",
Usage: "tipset to export from",
},
&cli.Int64Flag{
Name: "recent-stateroots",
},
&cli.BoolFlag{
Name: "full-state",
},
&cli.BoolFlag{
Name: "skip-old-msgs",
},
},
Action: func(cctx *cli.Context) error {
if !cctx.Args().Present() {
return lcli.ShowHelp(cctx, fmt.Errorf("must specify file name to write export to"))
}
ctx := context.TODO()
r, err := repo.NewFS(cctx.String("repo"))
if err != nil {
return xerrors.Errorf("opening fs repo: %w", err)
}
exists, err := r.Exists()
if err != nil {
return err
}
if !exists {
return xerrors.Errorf("lotus repo doesn't exist")
}
lr, err := r.Lock(repo.FullNode)
if err != nil {
return err
}
defer lr.Close() //nolint:errcheck
fi, err := os.Create(cctx.Args().First())
if err != nil {
return xerrors.Errorf("opening the output file: %w", err)
}
defer fi.Close() //nolint:errcheck
bs, err := lr.Blockstore(ctx, repo.BlockstoreChain)
if err != nil {
return fmt.Errorf("failed to open blockstore: %w", err)
}
defer func() {
if c, ok := bs.(io.Closer); ok {
if err := c.Close(); err != nil {
log.Warnf("failed to close blockstore: %s", err)
}
}
}()
mds, err := lr.Datastore(context.Background(), "/metadata")
if err != nil {
return err
}
cs := store.NewChainStore(bs, bs, mds, nil, nil)
defer cs.Close() //nolint:errcheck
if err := cs.Load(); err != nil {
return err
}
nroots := abi.ChainEpoch(cctx.Int64("recent-stateroots"))
fullstate := cctx.Bool("full-state")
skipoldmsgs := cctx.Bool("skip-old-msgs")
var ts *types.TipSet
if tss := cctx.String("tipset"); tss != "" {
cids, err := lcli.ParseTipSetString(tss)
if err != nil {
return xerrors.Errorf("failed to parse tipset (%q): %w", tss, err)
}
tsk := types.NewTipSetKey(cids...)
selts, err := cs.LoadTipSet(tsk)
if err != nil {
return xerrors.Errorf("loading tipset: %w", err)
}
ts = selts
} else {
ts = cs.GetHeaviestTipSet()
}
if fullstate {
nroots = ts.Height() + 1
}
if err := cs.Export(ctx, ts, nroots, skipoldmsgs, fi); err != nil {
return xerrors.Errorf("export failed: %w", err)
}
return nil
},
}