Function layer_apply_biases

plugins/askrene/layer.c:941–983

}

void layer_apply_biases(const struct layer *layer,
			const struct gossmap *gossmap,
			s8 *biases)
{
	struct bias *bias;
	struct bias_hash_iter it;
	struct node_bias *node_bias;
	struct node_bias_hash_iter node_it;

	/* We assume bias from individual channels and their node are additive,
	 * this is completely arbitrary. */
	for (node_bias = node_bias_hash_first(layer->node_biases, &node_it);
	     node_bias;
	     node_bias = node_bias_hash_next(layer->node_biases, &node_it)) {
		struct gossmap_node *n;
		struct gossmap_chan *c;
		int dir;
		u32 idx;

		n = gossmap_find_node(gossmap, &node_bias->node);
		if (!n)
			continue;
		for (size_t i = 0; i < n->num_chans; i++) {
			c = gossmap_nth_chan(gossmap, n, i, &dir);
			idx = (gossmap_chan_idx(gossmap, c) << 1) | dir;

			biases[idx] += node_bias->out_bias;
			biases[idx ^ 1] += node_bias->in_bias;
		}
	}

	for (bias = bias_hash_first(layer->biases, &it);
	     bias;
	     bias = bias_hash_next(layer->biases, &it)) {
		struct gossmap_chan *c;

		c = gossmap_find_chan(gossmap, &bias->scidd.scid);
		if (!c)
			continue;
		biases[(gossmap_chan_idx(gossmap, c) << 1) | bias->scidd.dir]
			+= bias->bias;
	}
}

struct amount_msat local_channel_capacity(const struct local_channel *lc)
{