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topology: listchannels by destination

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Changelog-Added: JSON-RPC: Have `listchannels` also be queried by `destination`.
This commit is contained in:
Michael Schmoock 2021-06-22 15:41:25 +02:00 committed by neil saitug
parent 6aaecbc7b3
commit fc238bc61c
1 changed files with 20 additions and 3 deletions
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23
plugins/topology.c
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@ -365,6 +365,7 @@ static void json_add_halfchan(struct json_stream *response,
struct listchannels_opts {
struct node_id *source;
struct node_id *destination;
struct short_channel_id *scid;
};
@ -450,6 +451,18 @@ static struct command_result *listpeers_done(struct command *cmd,
c, 1 << dir);
}
}
} else if (opts->destination) {
struct gossmap_node *dst;
dst = gossmap_find_node(gossmap, opts->destination);
if (dst) {
for (size_t i = 0; i < dst->num_chans; i++) {
int dir;
c = gossmap_nth_chan(gossmap, dst, i, &dir);
json_add_halfchan(js, gossmap, connected,
c, 1 << !dir);
}
}
} else {
for (c = gossmap_first_chan(gossmap);
c;
@ -474,12 +487,15 @@ static struct command_result *json_listchannels(struct command *cmd,
p_opt("short_channel_id", param_short_channel_id,
&opts->scid),
p_opt("source", param_node_id, &opts->source),
p_opt("destination", param_node_id, &opts->destination),
NULL))
return command_param_failed();
if (opts->scid && opts->source)
if (!!opts->scid + !!opts->source + !!opts->destination > 1)
return command_fail(cmd, JSONRPC2_INVALID_PARAMS,
"Cannot specify both source and short_channel_id");
"Can only specify one of "
"`short_channel_id`, "
"`source` or `destination`");
req = jsonrpc_request_start(cmd->plugin, cmd, "listpeers",
listpeers_done, forward_error, opts);
return send_outreq(cmd->plugin, req);
@ -688,7 +704,8 @@ static const struct plugin_command commands[] = {
"listchannels",
"channels",
"List all known channels in the network",
"Show channel {short_channel_id} or {source} (or all known channels, if not specified)",
"Show channels for {short_channel_id}, {source} or {destination} "
"(or all known channels, if not specified)",
json_listchannels,
},
{