feat: Add a roller relayer channel show command (#352)

cmd/relayer/channel/channel.go

@@ -0,0 +1,15 @@
+package channel
+
+import (
+	"github.com/dymensionxyz/roller/cmd/relayer/channel/show"
+	"github.com/spf13/cobra"
+)
+
+func Cmd() *cobra.Command {
+	cmd := &cobra.Command{
+		Use:   "channel",
+		Short: "Commands for managing the relayer channel",
+	}
+	cmd.AddCommand(show.Cmd())
+	return cmd
+}

cmd/relayer/channel/show/show.go

@@ -0,0 +1,31 @@
+package show
+
+import (
+	"fmt"
+	"github.com/dymensionxyz/roller/cmd/utils"
+	"github.com/dymensionxyz/roller/config"
+	"github.com/dymensionxyz/roller/relayer"
+	"github.com/spf13/cobra"
+)
+
+func Cmd() *cobra.Command {
+	cmd := &cobra.Command{
+		Use:   "show",
+		Short: "Show the channel data of the relayer on the local machine.",
+		Run: func(cmd *cobra.Command, args []string) {
+			home := cmd.Flag(utils.FlagNames.Home).Value.String()
+			rollappConfig, err := config.LoadConfigFromTOML(home)
+			utils.PrettifyErrorIfExists(err)
+			rly := relayer.NewRelayer(rollappConfig.Home, rollappConfig.RollappID, rollappConfig.HubData.ID)
+			srcChannel, dstChannel, err := rly.LoadChannels()
+			utils.PrettifyErrorIfExists(err)
+			if srcChannel == "" {
+				fmt.Println("💈 No channel has been created for the relayer yet.")
+			} else {
+				fmt.Printf("💈 Relayer Channels: src, %s <-> %s, dst\n",
+					srcChannel, dstChannel)
+			}
+		},
+	}
+	return cmd
+}

cmd/relayer/relayer.go

@@ -1,6 +1,7 @@
 package relayer
 
 import (
+	"github.com/dymensionxyz/roller/cmd/relayer/channel"
 	start "github.com/dymensionxyz/roller/cmd/relayer/start"
 	"github.com/spf13/cobra"
 )
@@ -11,5 +12,6 @@ func Cmd() *cobra.Command {
 		Short: "Commands for running and managing the RollApp relayer.",
 	}
 	cmd.AddCommand(start.Start())
+	cmd.AddCommand(channel.Cmd())
 	return cmd
 }