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