// commitment is still valid (unrevoked).
nodes[1].node().handle_update_fee(&nodes[0].node.get_our_node_id(), &update_fee);
let _last_revoke_and_ack = commitment_signed_dance!(nodes[1], nodes[0], commit_sig, false, true, false, true);
// commitment is still valid (unrevoked).
nodes[1].node().handle_update_fee(&nodes[0].node.get_our_node_id(), &update_fee);
let _last_revoke_and_ack = commitment_signed_dance!(nodes[1], nodes[0], commit_sig, false, true, false, true);