cli: libp2p listen addresses

Add a command line argument and default values for the libp2p multiaddr listen addresses.

Ref.: https://docs.libp2p.io/concepts/transports/listen-and-dial/

CHANGELOG.md

@@ -15,6 +15,8 @@ The following emojis are used to highlight certain changes:
 
 ### Added
 
+- Added configurable libp2p listen addresses for the Bitswap host via the `libp2p-listen-addrs` flag and `RAINBOW_LIBP2P_LISTEN_ADDRS` environment variable
+
 ### Changed
 
 ### Removed

main.go

@@ -248,8 +248,18 @@ Generate an identity seed and launch a gateway:
 			EnvVars: []string{"RAINBOW_IPNS_MAX_CACHE_TTL"},
 			Usage:   "Optional cap on caching duration for IPNS/DNSLink lookups. Set to 0 to respect original TTLs",
 		},
+		&cli.StringSliceFlag{
+			Name: "libp2p-listen-addrs",
+			Value: cli.NewStringSlice("/ip4/0.0.0.0/tcp/4001",
+				"/ip4/0.0.0.0/udp/4001/quic-v1",
+				"/ip4/0.0.0.0/udp/4001/quic-v1/webtransport",
+				"/ip6/::/tcp/4001",
+				"/ip6/::/udp/4001/quic-v1",
+				"/ip6/::/udp/4001/quic-v1/webtransport"),
+			EnvVars: []string{"RAINBOW_LIBP2P_LISTEN_ADDRS"},
+			Usage:   "Multiaddresses for libp2p bitswap client to listen on (comma-separated)",
+		},
 	}
-
 	app.Commands = []*cli.Command{
 		{
 			Name:  "gen-seed",
@@ -367,6 +377,7 @@ share the same seed as long as the indexes are different.
 			SeedPeeringMaxIndex:     cctx.Int("seed-peering-max-index"),
 			GCInterval:              cctx.Duration("gc-interval"),
 			GCThreshold:             cctx.Float64("gc-threshold"),
+			ListenAddrs:             cctx.StringSlice("listen-addrs"),
 		}
 
 		goLog.Debugf("Rainbow config: %+v", cfg)