Merge pull request #3126 from filecoin-project/feat/lotus-keygen

add lotus keygen utility

cmd/lotus-keygen/main.go

@@ -0,0 +1,76 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+
+	"github.com/filecoin-project/lotus/chain/wallet"
+	_ "github.com/filecoin-project/lotus/lib/sigs/bls"
+	_ "github.com/filecoin-project/lotus/lib/sigs/secp"
+	"github.com/filecoin-project/specs-actors/actors/crypto"
+	"github.com/urfave/cli/v2"
+)
+
+func main() {
+
+	app := cli.NewApp()
+	app.Flags = []cli.Flag{
+		&cli.StringFlag{
+			Name:    "type",
+			Aliases: []string{"t"},
+			Value:   "bls",
+			Usage:   "specify key type to generate (bls or secp256k1)",
+		},
+	}
+	app.Action = func(cctx *cli.Context) error {
+		memks := wallet.NewMemKeyStore()
+		w, err := wallet.NewWallet(memks)
+		if err != nil {
+			return err
+		}
+
+		var kt crypto.SigType
+		switch cctx.String("type") {
+		case "bls":
+			kt = crypto.SigTypeBLS
+		case "secp256k1":
+			kt = crypto.SigTypeSecp256k1
+		default:
+			return fmt.Errorf("unrecognized key type: %q", cctx.String("type"))
+		}
+
+		kaddr, err := w.GenerateKey(kt)
+		if err != nil {
+			return err
+		}
+
+		ki, err := w.Export(kaddr)
+		if err != nil {
+			return err
+		}
+
+		fi, err := os.Create(fmt.Sprintf("%s.key", kaddr))
+		if err != nil {
+			return err
+		}
+		defer fi.Close()
+
+		b, err := json.Marshal(ki)
+		if err != nil {
+			return err
+		}
+
+		if _, err := fi.Write(b); err != nil {
+			return fmt.Errorf("failed to write key info to file: %w", err)
+		}
+
+		fmt.Println("Generated new key: ", kaddr)
+		return nil
+	}
+
+	if err := app.Run(os.Args); err != nil {
+		fmt.Println(err)
+		os.Exit(1)
+	}
+}