From 81bbeaa6128a122f56dc4747e7fb24cd6918891e Mon Sep 17 00:00:00 2001
From: Max Rantil <rantil@pm.me>
Date: Mon, 22 Jul 2024 13:15:17 +0200
Subject: [PATCH] json-rpc: add rpc to provide bound alt-addr

Signed-off-by: Max Rantil <rantil@pm.me>
---
 lightningd/channel_control.c | 53 ++++++++++++++++++++++++++++++++++++
 1 file changed, 53 insertions(+)

diff --git a/lightningd/channel_control.c b/lightningd/channel_control.c
index 093ef5446647..5c4826445188 100644
--- a/lightningd/channel_control.c
+++ b/lightningd/channel_control.c
@@ -2361,3 +2361,56 @@ static const struct json_command dev_quiesce_command = {
 	.dev_only = true,
 };
 AUTODATA(json_command, &dev_quiesce_command);
+
+static struct command_result *json_alt_addr(struct command *cmd,
+					    const char *buffer,
+					    const jsmntok_t *obj UNNEEDED,
+					    const jsmntok_t *params)
+{
+	struct node_id *p_id;
+	struct peer *peer;
+	struct channel *channel;
+	const char *our_alt_addr;
+	bool more_than_one;
+
+	if (!param_check(cmd, buffer, params,
+			 p_req("node_id", param_node_id, &p_id),
+			 p_req("alt_addr", param_string, &our_alt_addr),
+			 NULL))
+		return command_param_failed();
+
+	peer = peer_by_id(cmd->ld, p_id);
+	if (!peer) {
+		return command_fail(cmd, JSONRPC2_INVALID_REQUEST,
+				    "No such peer: %s",
+				    fmt_node_id(cmd, p_id));
+	}
+
+	channel = peer_any_channel(peer, channel_state_can_add_htlc, &more_than_one);
+	if (!channel || !channel->owner)
+		return command_fail(cmd, LIGHTNINGD, "Peer bad state");
+	/* This is a dev command: fix the api if you need this! */
+	if (more_than_one)
+		return command_fail(cmd, LIGHTNINGD, "More than one channel");
+
+	if (command_check_only(cmd))
+		return command_check_done(cmd);
+
+	u8 *msg = towire_channeld_peer_alt_addr(peer, (u8 *)our_alt_addr);
+	subd_send_msg(channel->owner, take(msg));
+
+	wallet_add_alt_addr(cmd->ld->wallet->db, p_id, our_alt_addr, true);
+
+	/* FIXME(maxrantil), We need to add this to 'listnodes' command too! */
+
+	return command_success(cmd, json_stream_success(cmd));
+}
+
+static const struct json_command alt_addr_command = {
+	"alt-addr",
+	"developer",
+	json_alt_addr,
+	"Select an alternative private address for peer-to-peer connections",
+	.dev_only = true,
+};
+AUTODATA(json_command, &alt_addr_command);