if let Some((new_timer, new_feerate, tx)) = self.generate_claim_tx(height, &claim_material, &*fee_estimator) {
claim_material.height_timer = new_timer;
claim_material.feerate_previous = new_feerate;
let txid = tx.txid();
if let Some((new_timer, new_feerate, tx)) = self.generate_claim_tx(height, &claim_material, &*fee_estimator) {
claim_material.height_timer = new_timer;
claim_material.feerate_previous = new_feerate;
let txid = tx.txid();