Function json_sendonionmessage

lightningd/onion_message.c:206–260

}

static struct command_result *json_sendonionmessage(struct command *cmd,
						    const char *buffer,
						    const jsmntok_t *obj UNNEEDED,
						    const jsmntok_t *params)
{
	struct onion_hop *hops;
	struct node_id *first_id;
	struct pubkey *blinding;
	struct sphinx_path *sphinx_path;
	struct onionpacket *op;
	struct secret *path_secrets;
	size_t onion_size;

	if (!param(cmd, buffer, params,
		   p_req("first_id", param_node_id, &first_id),
		   p_req("blinding", param_pubkey, &blinding),
		   p_req("hops", param_onion_hops, &hops),
		   NULL))
		return command_param_failed();

	if (!feature_offered(cmd->ld->our_features->bits[NODE_ANNOUNCE_FEATURE],
			     OPT_ONION_MESSAGES))
		return command_fail(cmd, LIGHTNINGD,
				    "experimental-onion-messages not enabled");

	/* Sanity check first; connectd doesn't bother telling us if peer
	 * can't be reached. */
	if (!peer_by_id(cmd->ld, first_id))
		return command_fail(cmd, LIGHTNINGD, "Unknown first peer");

	/* Create an onion which encodes this. */
	sphinx_path = sphinx_path_new(cmd, NULL);
	for (size_t i = 0; i < tal_count(hops); i++)
		sphinx_add_hop(sphinx_path, &hops[i].node, hops[i].tlv);

	/* BOLT-onion-message #4:
	 * - SHOULD set `len` to 1366 or 32834.
	 */
	if (sphinx_path_payloads_size(sphinx_path) <= ROUTING_INFO_SIZE)
		onion_size = ROUTING_INFO_SIZE;
	else
		onion_size = 32768;

	op = create_onionpacket(tmpctx, sphinx_path, onion_size, &path_secrets);
	if (!op)
		return command_fail(cmd, JSONRPC2_INVALID_PARAMS,
				    "Creating onion failed (tlvs too long?)");

	subd_send_msg(cmd->ld->connectd,
		      take(towire_connectd_send_onionmsg(NULL, first_id,
					serialize_onionpacket(tmpctx, op),
					blinding)));

	return command_success(cmd, json_stream_success(cmd));
}

static const struct json_command sendonionmessage_command = {
	"sendonionmessage",