119 lines
2.6 KiB
Go
119 lines
2.6 KiB
Go
package main
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import (
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"encoding/base64"
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"encoding/hex"
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"fmt"
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"os"
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"github.com/filecoin-project/lotus/blockstore"
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"github.com/ipld/go-car"
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"github.com/filecoin-project/go-state-types/abi"
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"github.com/ipfs/go-cid"
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mh "github.com/multiformats/go-multihash"
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"github.com/urfave/cli/v2"
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"golang.org/x/xerrors"
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)
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var cidCmd = &cli.Command{
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Name: "cid",
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Usage: "Cid command",
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Subcommands: cli.Commands{
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cidIdCmd,
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cidFromCarCmd,
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},
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}
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var cidIdCmd = &cli.Command{
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Name: "id",
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Usage: "Create identity CID from hex or base64 data",
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ArgsUsage: "[data]",
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Flags: []cli.Flag{
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&cli.StringFlag{
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Name: "encoding",
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Aliases: []string{"e"},
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Value: "base64",
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Usage: "specify input encoding to parse",
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},
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&cli.StringFlag{
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Name: "codec",
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Value: "id",
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Usage: "multicodec-packed content types: abi or id",
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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 fmt.Errorf("must specify data")
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}
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var dec []byte
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switch cctx.String("encoding") {
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case "base64":
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data, err := base64.StdEncoding.DecodeString(cctx.Args().First())
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if err != nil {
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return xerrors.Errorf("decoding base64 value: %w", err)
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}
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dec = data
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case "hex", "x":
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data, err := hex.DecodeString(cctx.Args().First())
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if err != nil {
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return xerrors.Errorf("decoding hex value: %w", err)
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}
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dec = data
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case "raw", "r":
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dec = []byte(cctx.Args().First())
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default:
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return xerrors.Errorf("unrecognized encoding: %s", cctx.String("encoding"))
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}
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switch cctx.String("codec") {
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case "abi":
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aCid, err := abi.CidBuilder.Sum(dec)
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if err != nil {
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return xerrors.Errorf("cidBuilder abi: %w", err)
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}
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fmt.Println(aCid)
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case "id":
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builder := cid.V1Builder{Codec: cid.Raw, MhType: mh.IDENTITY}
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rCid, err := builder.Sum(dec)
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if err != nil {
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return xerrors.Errorf("cidBuilder raw: %w", err)
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}
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fmt.Println(rCid)
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default:
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return xerrors.Errorf("unrecognized codec: %s", cctx.String("codec"))
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}
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return nil
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},
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}
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var cidFromCarCmd = &cli.Command{
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Name: "manifest-cid-from-car",
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Usage: "Get the manifest CID from a car file",
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ArgsUsage: "[path]",
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Action: func(cctx *cli.Context) error {
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ctx := cctx.Context
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cf := cctx.Args().Get(0)
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f, err := os.OpenFile(cf, os.O_RDONLY, 0664)
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if err != nil {
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return xerrors.Errorf("opening the car file: %w", err)
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}
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bs := blockstore.NewMemory()
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hdr, err := car.LoadCar(ctx, bs, f)
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if err != nil {
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return xerrors.Errorf("error loading car file: %w", err)
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}
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manifestCid := hdr.Roots[0]
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fmt.Printf("Manifest CID: %s\n", manifestCid.String())
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return nil
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},
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}
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