Merge pull request #4726 from filecoin-project/feat/shed-id-cid

shed: Util for creating ID CIDs

cmd/lotus-shed/cid.go

@@ -0,0 +1,48 @@
+package main
+
+import (
+	"encoding/base64"
+	"encoding/hex"
+	"fmt"
+
+	"github.com/urfave/cli/v2"
+
+	"github.com/ipfs/go-cid"
+	mh "github.com/multiformats/go-multihash"
+)
+
+var cidCmd = &cli.Command{
+	Name: "cid",
+	Subcommands: cli.Commands{
+		cidIdCmd,
+	},
+}
+
+var cidIdCmd = &cli.Command{
+	Name:  "id",
+	Usage: "create identity CID from hex or base64 data",
+	Action: func(cctx *cli.Context) error {
+		if !cctx.Args().Present() {
+			return fmt.Errorf("must specify data")
+		}
+
+		dec, err := hex.DecodeString(cctx.Args().First())
+		if err != nil {
+			dec, err = base64.StdEncoding.DecodeString(cctx.Args().First())
+			if err != nil {
+				return err
+			}
+
+		}
+
+		builder := cid.V1Builder{Codec: cid.Raw, MhType: mh.IDENTITY}
+
+		c, err := builder.Sum(dec)
+		if err != nil {
+			return err
+		}
+
+		fmt.Println(c)
+		return nil
+	},
+}

cmd/lotus-shed/main.go

@@ -48,6 +48,7 @@ func main() {
 		msgCmd,
 		electionCmd,
 		rpcCmd,
+		cidCmd,
 	}
 
 	app := &cli.App{