let feerate = fee_estimator.get_est_sat_per_vbyte(ConfirmationTarget::Normal);
let background_feerate = fee_estimator.get_est_sat_per_vbyte(ConfirmationTarget::Background);
let mut key_seed = [0u8; 32];
let feerate = fee_estimator.get_est_sat_per_vbyte(ConfirmationTarget::Normal);
let background_feerate = fee_estimator.get_est_sat_per_vbyte(ConfirmationTarget::Background);
let mut key_seed = [0u8; 32];