From c0204cdd83e5f93c27001eb5c5335783d384dc9c Mon Sep 17 00:00:00 2001
From: Aayush Rajasekaran <arajasek94@gmail.com>
Date: Wed, 15 Apr 2020 13:50:46 -0400
Subject: [PATCH] Add a shed command to turn raw commPs into CIDs

---
 cmd/lotus-shed/commp.go | 17 +++++++++++++++++
 cmd/lotus-shed/main.go  |  1 +
 2 files changed, 18 insertions(+)
 create mode 100644 cmd/lotus-shed/commp.go

diff --git a/cmd/lotus-shed/commp.go b/cmd/lotus-shed/commp.go
new file mode 100644
index 000000000..c9808c19a
--- /dev/null
+++ b/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
+	},
+}
diff --git a/cmd/lotus-shed/main.go b/cmd/lotus-shed/main.go
index d31151184..7a950e14a 100644
--- a/cmd/lotus-shed/main.go
+++ b/cmd/lotus-shed/main.go
@@ -23,6 +23,7 @@ func main() {
 		bigIntParseCmd,
 		staterootStatsCmd,
 		importCarCmd,
+		commpToCidCmd,
 	}
 
 	app := &cli.App{