).unwrap();
let countersignatory_htlc_key = HtlcKey::from_basepoint(
&secp_ctx, &self.inner.counterparty_pubkeys().unwrap().htlc_basepoint, &htlc_descriptor.per_commitment_point,
).unwrap();
let countersignatory_htlc_key = HtlcKey::from_basepoint(
&secp_ctx, &self.inner.counterparty_pubkeys().unwrap().htlc_basepoint, &htlc_descriptor.per_commitment_point,