Function payment_collect_result

plugins/libplugin-pay.c:202–255

}

struct payment_tree_result payment_collect_result(struct payment *p)
{
	struct payment_tree_result res;
	size_t numchildren = tal_count(p->children);
	res.sent = AMOUNT_MSAT(0);
	res.attempts = 1;
	res.treestates = p->step;
	res.leafstates = 0;
	res.preimage = NULL;
	res.failure = NULL;
	if (p->step == PAYMENT_STEP_FAILED && p->result != NULL)
		res.failure = p->result;

	if (numchildren == 0) {
		res.leafstates |= p->step;
		if (p->result && p->result->state == PAYMENT_COMPLETE) {
			res.sent = p->result->amount_sent;
			res.preimage = p->result->payment_preimage;
		}
	}

	for (size_t i = 0; i < numchildren; i++) {
		struct payment_tree_result cres =
		    payment_collect_result(p->children[i]);

		/* Some of our subpayments have succeeded, aggregate how much
		 * we sent in total. */
		if (!amount_msat_add(&res.sent, res.sent, cres.sent))
			paymod_err(
			    p,
			    "Number overflow summing partial payments: %s + %s",
			    type_to_string(tmpctx, struct amount_msat,
					   &res.sent),
			    type_to_string(tmpctx, struct amount_msat,
					   &cres.sent));

		/* Bubble up the first preimage we see. */
		if (res.preimage == NULL && cres.preimage != NULL)
			res.preimage = cres.preimage;

		res.leafstates |= cres.leafstates;
		res.treestates |= cres.treestates;
		res.attempts += cres.attempts;

		/* We bubble the failure result with the highest failcode up
		 * to the root. */
		if (res.failure == NULL ||
		    (cres.failure != NULL &&
		     cres.failure->failcode > res.failure->failcode)) {
			res.failure = cres.failure;
		}
	}
	return res;
}

static struct command_result *
payment_getblockheight_success(struct command *cmd,