lncli: add querymc command

Adds querymc command to lncli to dump mission control state.

cmd/lncli/cmd_query_mission_control.go

@@ -0,0 +1,35 @@
+// +build routerrpc
+
+package main
+
+import (
+	"context"
+
+	"github.com/lightningnetwork/lnd/lnrpc/routerrpc"
+
+	"github.com/urfave/cli"
+)
+
+var queryMissionControlCommand = cli.Command{
+	Name:     "querymc",
+	Category: "Payments",
+	Action:   actionDecorator(queryMissionControl),
+}
+
+func queryMissionControl(ctx *cli.Context) error {
+	conn := getClientConn(ctx, false)
+	defer conn.Close()
+
+	client := routerrpc.NewRouterClient(conn)
+
+	req := &routerrpc.QueryMissionControlRequest{}
+	rpcCtx := context.Background()
+	snapshot, err := client.QueryMissionControl(rpcCtx, req)
+	if err != nil {
+		return err
+	}
+
+	printRespJSON(snapshot)
+
+	return nil
+}

cmd/lncli/main.go

@@ -303,6 +303,7 @@ func main() {
 	// Add any extra autopilot commands determined by build flags.
 	app.Commands = append(app.Commands, autopilotCommands()...)
 	app.Commands = append(app.Commands, invoicesCommands()...)
+	app.Commands = append(app.Commands, routerCommands()...)
 
 	if err := app.Run(os.Args); err != nil {
 		fatal(err)

cmd/lncli/routerrpc_active.go

@@ -0,0 +1,10 @@
+// +build routerrpc
+
+package main
+
+import "github.com/urfave/cli"
+
+// routerCommands will return nil for non-routerrpc builds.
+func routerCommands() []cli.Command {
+	return []cli.Command{queryMissionControlCommand}
+}

cmd/lncli/routerrpc_default.go

@@ -0,0 +1,10 @@
+// +build !routerrpc
+
+package main
+
+import "github.com/urfave/cli"
+
+// routerCommands will return nil for non-routerrpc builds.
+func routerCommands() []cli.Command {
+	return nil
+}