Add a shed command to turn raw commPs into CIDs

cmd/lotus-shed/commp.go

@@ -0,0 +1,17 @@
+package main
+
+import (
+	"fmt"
+	commcid "github.com/filecoin-project/go-fil-commcid"
+	"gopkg.in/urfave/cli.v2"
+)
+
+var commpToCidCmd = &cli.Command{
+	Name:        "commp-to-cid",
+	Description: "Convert a raw commP to a piece-Cid",
+	Action: func(cctx *cli.Context) error {
+		cp := []byte(cctx.Args().Get(0))
+		fmt.Println(commcid.PieceCommitmentV1ToCID(cp))
+		return nil
+	},
+}

cmd/lotus-shed/main.go

@@ -23,6 +23,7 @@ func main() {
 		bigIntParseCmd,
 		staterootStatsCmd,
 		importCarCmd,
+		commpToCidCmd,
 	}
 
 	app := &cli.App{