dcrlncli: Add RescanWallet command

cmd/dcrlncli/cmd_dcrlnd_commands.go

@@ -0,0 +1,62 @@
+package main
+
+import (
+	"errors"
+	"io"
+
+	"github.com/decred/dcrlnd/lnrpc/walletrpc"
+	"github.com/urfave/cli"
+)
+
+var rescanWalletCommand = cli.Command{
+	Name:  "rescanwallet",
+	Usage: "Peform an on-chain rescan for wallet funds.",
+	Description: `
+	Performs an on-chain rescan for wallet funds.
+
+	This does NOT do any changes to LN channels or recovers funds encumbered
+	by LN channels, this only attempts to find on-chain funds that may have
+	been missed by dcrwallet.`,
+	ArgsUsage: "[height]",
+	Flags: []cli.Flag{
+		cli.Int64Flag{
+			Name:  "height",
+			Usage: "The starting height from which to perform rescan",
+		},
+	},
+	Action: actionDecorator(rescanWallet),
+}
+
+func rescanWallet(ctx *cli.Context) error {
+	var (
+		height int32
+		err    error
+	)
+	ctxc := getContext()
+	client, cleanUp := getWalletClient(ctx)
+	defer cleanUp()
+
+	if ctx.IsSet("height") {
+		height = int32(ctx.Int64("height"))
+	}
+
+	request := &walletrpc.RescanWalletRequest{
+		BeginHeight: height,
+	}
+
+	resp, err := client.RescanWallet(ctxc, request)
+	if err != nil {
+		return err
+	}
+
+	progress, err := resp.Recv()
+	for err == nil {
+		printRespJSON(progress)
+		progress, err = resp.Recv()
+	}
+	if !errors.Is(err, io.EOF) {
+		return err
+	}
+
+	return nil
+}

cmd/dcrlncli/walletrpc_active.go

@@ -62,6 +62,7 @@ func walletCommands() []cli.Command {
 				listLeasesCommand,
 				psbtCommand,
 				accountsCommand,
+				rescanWalletCommand,
 			},
 		},
 	}