Function populate_private_layer

plugins/xpay/xpay.c:2088–2133

Create a layer with our payment-specific topology information */

/* Create a layer with our payment-specific topology information */
static struct command_result *populate_private_layer(struct command *cmd,
						     struct payment *payment)
{
	struct request_batch *batch;
	bool all_failed;
	char *errors = NULL;
	struct out_req *req;
	struct command *aux_cmd;

	/* Everything else is parented to a separate command, which
	 * can outlive the one we respond to. */
	aux_cmd = aux_command(cmd);
	tal_steal(aux_cmd, payment);
	batch = request_batch_new(aux_cmd, NULL, log_payment_err, start_getroutes,
				  payment);
	req = add_to_batch(aux_cmd, batch, "askrene-create-layer");
	json_add_string(req->js, "layer", payment->private_layer);
	send_payment_req(aux_cmd, payment, req);

	for (size_t i = 0; i < tal_count(payment->route_hints); i++)
		add_routehint(batch, aux_cmd, payment, payment->route_hints[i]);

	all_failed = tal_count(payment->paths) ? true : false;
	for (size_t i = 0; i < tal_count(payment->paths); i++) {
		char *err = add_blindedpath(tmpctx, batch,
					    aux_cmd, payment, i,
					    payment->paths[i],
					    payment->payinfos[i]);
		if (!err) {
			all_failed = false;
			continue;
		}
		if (!errors)
			errors = err;
		else
			tal_append_fmt(&errors, ", %s", err);
	}

	/* Nothing actually created yet, so this is the last point we don't use
	 * "payment_give_up" */
	if (all_failed)
		return command_fail(aux_cmd, PAY_ROUTE_NOT_FOUND,
				    "No usable blinded paths: %s", errors);

	return batch_done(aux_cmd, batch);
}

static struct command_result *
preapproveinvoice_succeed(struct command *cmd,