From 6328b2e9898e7c04a1e854b39609ab8809fe3bc4 Mon Sep 17 00:00:00 2001
From: Joost Jager <joost.jager@gmail.com>
Date: Thu, 29 Aug 2019 13:03:37 +0200
Subject: [PATCH] lncli: add BuildRoute function
---
cmd/lncli/cmd_build_route.go | 94 +++++++++++++++++++++++++++++++++++
cmd/lncli/routerrpc_active.go | 6 ++-
2 files changed, 99 insertions(+), 1 deletion(-)
create mode 100644 cmd/lncli/cmd_build_route.go
diff --git a/cmd/lncli/cmd_build_route.go b/cmd/lncli/cmd_build_route.go
new file mode 100644
index 000000000..64cda08fa
--- /dev/null
+++ b/cmd/lncli/cmd_build_route.go
@@ -0,0 +1,94 @@
+// +build routerrpc
+
+package main
+
+import (
+ "context"
+ "errors"
+ "fmt"
+ "strings"
+
+ "github.com/lightningnetwork/lnd"
+ "github.com/lightningnetwork/lnd/lnrpc/routerrpc"
+ "github.com/lightningnetwork/lnd/routing/route"
+ "github.com/urfave/cli"
+)
+
+var buildRouteCommand = cli.Command{
+ Name: "buildroute",
+ Category: "Payments",
+ Usage: "Build a route from a list of hop pubkeys.",
+ Action: actionDecorator(buildRoute),
+ Flags: []cli.Flag{
+ cli.Int64Flag{
+ Name: "amt",
+ Usage: "the amount to send expressed in satoshis. If" +
+ "not set, the minimum routable amount is used",
+ },
+ cli.Int64Flag{
+ Name: "final_cltv_delta",
+ Usage: "number of blocks the last hop has to reveal " +
+ "the preimage",
+ Value: lnd.DefaultBitcoinTimeLockDelta,
+ },
+ cli.StringFlag{
+ Name: "hops",
+ Usage: "comma separated hex pubkeys",
+ },
+ cli.Uint64Flag{
+ Name: "outgoing_chan_id",
+ Usage: "short channel id of the outgoing channel to " +
+ "use for the first hop of the payment",
+ Value: 0,
+ },
+ },
+}
+
+func buildRoute(ctx *cli.Context) error {
+ conn := getClientConn(ctx, false)
+ defer conn.Close()
+
+ client := routerrpc.NewRouterClient(conn)
+
+ if !ctx.IsSet("hops") {
+ return errors.New("hops required")
+ }
+
+ // Build list of hop addresses for the rpc.
+ hops := strings.Split(ctx.String("hops"), ",")
+ rpcHops := make([][]byte, 0, len(hops))
+ for _, k := range hops {
+ pubkey, err := route.NewVertexFromStr(k)
+ if err != nil {
+ return fmt.Errorf("error parsing %v: %v", k, err)
+ }
+ rpcHops = append(rpcHops, pubkey[:])
+ }
+
+ var amtMsat int64
+ hasAmt := ctx.IsSet("amt")
+ if hasAmt {
+ amtMsat = ctx.Int64("amt") * 1000
+ if amtMsat == 0 {
+ return fmt.Errorf("non-zero amount required")
+ }
+ }
+
+ // Call BuildRoute rpc.
+ req := &routerrpc.BuildRouteRequest{
+ AmtMsat: amtMsat,
+ FinalCltvDelta: int32(ctx.Int64("final_cltv_delta")),
+ HopPubkeys: rpcHops,
+ OutgoingChanId: ctx.Uint64("outgoing_chan_id"),
+ }
+
+ rpcCtx := context.Background()
+ route, err := client.BuildRoute(rpcCtx, req)
+ if err != nil {
+ return err
+ }
+
+ printJSON(route)
+
+ return nil
+}
diff --git a/cmd/lncli/routerrpc_active.go b/cmd/lncli/routerrpc_active.go
index f323aed1e..4d2172679 100644
--- a/cmd/lncli/routerrpc_active.go
+++ b/cmd/lncli/routerrpc_active.go
@@ -6,5 +6,9 @@ import "github.com/urfave/cli"
// routerCommands will return nil for non-routerrpc builds.
func routerCommands() []cli.Command {
- return []cli.Command{queryMissionControlCommand, resetMissionControlCommand}
+ return []cli.Command{
+ queryMissionControlCommand,
+ resetMissionControlCommand,
+ buildRouteCommand,
+ }
}