Trait FeeEstimator

pub trait FeeEstimator {
    // Required method
    fn get_est_sat_per_1000_weight(
        &self,
        confirmation_target: ConfirmationTarget,
    ) -> u32;
}

A trait which should be implemented to provide feerate information on a number of time horizons.

If access to a local mempool is not feasible, feerate estimates should be fetched from a set of third-parties hosting them. Note that this enables them to affect the propagation of your pre-signed transactions at any time and therefore endangers the safety of channels funds. It should be considered carefully as a deployment.

Note that all of the functions implemented here must be reentrant-safe (obviously - they’re called from inside the library in response to chain events, P2P events, or timer events).

Required Methods

fn get_est_sat_per_1000_weight( &self, confirmation_target: ConfirmationTarget, ) -> u32

Gets estimated satoshis of fee required per 1000 Weight-Units.

LDK will wrap this method and ensure that the value returned is no smaller than 253 (ie 1 satoshi-per-byte rounded up to ensure later round-downs don’t put us below 1 satoshi-per-byte).

The following unit conversions can be used to convert to sats/KW:

• satoshis-per-byte * 250
• satoshis-per-kbyte / 4

Implementors