Function channel_hints_update

plugins/libplugin-pay.c:322–394

}

static void channel_hints_update(struct payment *p,
				 const struct short_channel_id scid,
				 int direction, bool enabled, bool local,
				 const struct amount_msat *estimated_capacity,
				 u16 *htlc_budget)
{
	struct payment *root = payment_root(p);
	struct channel_hint newhint;

	/* If the channel is marked as enabled it must have an estimate. */
	assert(!enabled || estimated_capacity != NULL);

	/* Try and look for an existing hint: */
	for (size_t i=0; i<tal_count(root->channel_hints); i++) {
		struct channel_hint *hint = &root->channel_hints[i];
		if (short_channel_id_eq(&hint->scid.scid, &scid) &&
		    hint->scid.dir == direction) {
			bool modified = false;
			/* Prefer to disable a channel. */
			if (!enabled && hint->enabled) {
				hint->enabled = false;
				modified = true;
			}

			/* Prefer the more conservative estimate. */
			if (estimated_capacity != NULL &&
			    amount_msat_greater(hint->estimated_capacity,
						*estimated_capacity)) {
				hint->estimated_capacity = *estimated_capacity;
				modified = true;
			}
			if (htlc_budget != NULL && *htlc_budget < hint->htlc_budget) {
				hint->htlc_budget = *htlc_budget;
				modified = true;
			}

			if (modified)
				paymod_log(p, LOG_DBG,
					   "Updated a channel hint for %s: "
					   "enabled %s, "
					   "estimated capacity %s",
					   type_to_string(tmpctx,
						struct short_channel_id_dir,
						&hint->scid),
					   hint->enabled ? "true" : "false",
					   type_to_string(tmpctx,
						struct amount_msat,
						&hint->estimated_capacity));
			return;
		}
	}

	/* No hint found, create one. */
	newhint.enabled = enabled;
	newhint.scid.scid = scid;
	newhint.scid.dir = direction;
	newhint.local = local;
	if (estimated_capacity != NULL)