+ fn time_passed(&mut self, _duration_since_epoch: Duration) {
+ let decay_params = self.decay_params;
+ self.channel_liquidities.retain(|_scid, liquidity| {
+ liquidity.min_liquidity_offset_msat = liquidity.decayed_offset(liquidity.min_liquidity_offset_msat, decay_params);
+ liquidity.max_liquidity_offset_msat = liquidity.decayed_offset(liquidity.max_liquidity_offset_msat, decay_params);
+ liquidity.last_updated = T::now();
+ let elapsed_time =
+ T::now().duration_since(liquidity.offset_history_last_updated);
+ if elapsed_time > decay_params.historical_no_updates_half_life {
+ let half_life = decay_params.historical_no_updates_half_life.as_secs_f64();
+ if half_life != 0.0 {
+ let divisor = powf64(2048.0, elapsed_time.as_secs_f64() / half_life) as u64;
+ for bucket in liquidity.min_liquidity_offset_history.buckets.iter_mut() {
+ *bucket = ((*bucket as u64) * 1024 / divisor) as u16;
+ }
+ for bucket in liquidity.max_liquidity_offset_history.buckets.iter_mut() {
+ *bucket = ((*bucket as u64) * 1024 / divisor) as u16;
+ }
+ liquidity.offset_history_last_updated = T::now();
+ }
+ }
+ liquidity.min_liquidity_offset_msat != 0 || liquidity.max_liquidity_offset_msat != 0 ||
+ liquidity.min_liquidity_offset_history.buckets != [0; 32] ||
+ liquidity.max_liquidity_offset_history.buckets != [0; 32]
+ });
+ }