fountain: decode peer id (#1593)

Co-authored-by: Travis Person <travisperson@users.noreply.github.com>

cmd/lotus-fountain/main.go

@@ -16,7 +16,7 @@ import (
 	"github.com/filecoin-project/specs-actors/actors/builtin/power"
 	"github.com/ipfs/go-cid"
 	logging "github.com/ipfs/go-log/v2"
-	peer "github.com/libp2p/go-libp2p-peer"
+	"github.com/libp2p/go-libp2p-core/peer"
 	"golang.org/x/xerrors"
 	"gopkg.in/urfave/cli.v2"
 
@@ -94,6 +94,11 @@ var runCmd = &cli.Command{
 			return xerrors.Errorf("parsing source address (provide correct --from flag!): %w", err)
 		}
 
+		defaultMinerPeer, err := peer.Decode("12D3KooWJpBNhwgvoZ15EB1JwRTRpxgM9D2fwq6eEktrJJG74aP6")
+		if err != nil {
+			return err
+		}
+
 		h := &handler{
 			ctx:  ctx,
 			api:  nodeApi,
@@ -114,6 +119,7 @@ var runCmd = &cli.Command{
 				WalletRate:  1 * time.Hour,
 				WalletBurst: 2,
 			}),
+			defaultMinerPeer: defaultMinerPeer,
 		}
 
 		http.Handle("/", http.FileServer(rice.MustFindBox("site").HTTPBox()))
@@ -141,6 +147,8 @@ type handler struct {
 
 	limiter      *Limiter
 	minerLimiter *Limiter
+
+	defaultMinerPeer peer.ID
 }
 
 func (h *handler) send(w http.ResponseWriter, r *http.Request) {
@@ -277,7 +285,7 @@ func (h *handler) mkminer(w http.ResponseWriter, r *http.Request) {
 		Owner:      owner,
 		Worker:     owner,
 		SectorSize: abi.SectorSize(ssize),
-		Peer:       peer.ID("12D3KooWJpBNhwgvoZ15EB1JwRTRpxgM9D2fwq6eEktrJJG74aP6"),
+		Peer:       h.defaultMinerPeer,
 	})
 	if err != nil {
 		w.WriteHeader(400)