cmd: abandon api support

cmd/loop/main.go

@@ -147,7 +147,7 @@ func main() {
 		monitorCommand, quoteCommand, listAuthCommand,
 		listSwapsCommand, swapInfoCommand, getLiquidityParamsCommand,
 		setLiquidityRuleCommand, suggestSwapCommand, setParamsCommand,
-		getInfoCommand,
+		getInfoCommand, abandonSwapCommand,
 	}
 
 	err := app.Run(os.Args)

cmd/loop/swaps.go

@@ -90,3 +90,73 @@ func swapInfo(ctx *cli.Context) error {
 	printRespJSON(resp)
 	return nil
 }
+
+var abandonSwapCommand = cli.Command{
+	Name:  "abandonswap",
+	Usage: "abandon a swap with a given swap hash",
+	Description: "This command overrides the database and abandons a " +
+		"swap with a given swap hash.\n\n" +
+		"!!! This command might potentially lead to loss of funds if " +
+		"it is applied to swaps that are still waiting for pending " +
+		"user funds. Before executing this command make sure that " +
+		"no funds are locked by the swap.",
+	ArgsUsage: "ID",
+	Flags: []cli.Flag{
+		cli.BoolFlag{
+			Name: "i_know_what_i_am_doing",
+			Usage: "Specify this flag if you made sure that you " +
+				"read and understood the following " +
+				"consequence of applying this command.",
+		},
+	},
+	Action: abandonSwap,
+}
+
+func abandonSwap(ctx *cli.Context) error {
+	args := ctx.Args()
+
+	var id string
+	switch {
+	case ctx.IsSet("id"):
+		id = ctx.String("id")
+
+	case ctx.NArg() > 0:
+		id = args[0]
+		args = args.Tail() // nolint:wastedassign
+
+	default:
+		// Show command help if no arguments and flags were provided.
+		return cli.ShowCommandHelp(ctx, "abandonswap")
+	}
+
+	if len(id) != hex.EncodedLen(lntypes.HashSize) {
+		return fmt.Errorf("invalid swap ID")
+	}
+	idBytes, err := hex.DecodeString(id)
+	if err != nil {
+		return fmt.Errorf("cannot hex decode id: %v", err)
+	}
+
+	client, cleanup, err := getClient(ctx)
+	if err != nil {
+		return err
+	}
+	defer cleanup()
+
+	if !ctx.Bool("i_know_what_i_am_doing") {
+		return cli.ShowCommandHelp(ctx, "abandonswap")
+	}
+
+	resp, err := client.AbandonSwap(
+		context.Background(), &looprpc.AbandonSwapRequest{
+			Id:                idBytes,
+			IKnowWhatIAmDoing: ctx.Bool("i_know_what_i_am_doing"),
+		},
+	)
+	if err != nil {
+		return err
+	}
+
+	printRespJSON(resp)
+	return nil
+}

loopd/perms/perms.go

@@ -31,6 +31,16 @@ var RequiredPermissions = map[string][]bakery.Op{
 		Entity: "swap",
 		Action: "read",
 	}},
+	"/looprpc.SwapClient/AbandonSwap": {{
+		Entity: "swap",
+		Action: "execute",
+	}, {
+		Entity: "loop",
+		Action: "in",
+	}, {
+		Entity: "loop",
+		Action: "out",
+	}},
 	"/looprpc.SwapClient/LoopOutTerms": {{
 		Entity: "terms",
 		Action: "read",