Correct per_outbound_htlc_counterparty_commit_tx_fee_msat

We account for the fees of the htlc transaction only in case the channel
does _not_ support zero fee htlc transactions.

Author: tankyleo

lightning/src/ln/chan_utils.rs

@@ -201,9 +201,9 @@ pub(crate) fn per_outbound_htlc_counterparty_commit_tx_fee_msat(feerate_per_kw:
 	// since the lowest denomination of bitcoin on-chain is the satoshi.
 	let commitment_tx_fee = COMMITMENT_TX_WEIGHT_PER_HTLC * feerate_per_kw as u64 / 1000 * 1000;
 	if channel_type_features.supports_anchors_zero_fee_htlc_tx() {
-		commitment_tx_fee + htlc_success_tx_weight(channel_type_features) * feerate_per_kw as u64 / 1000
-	} else {
 		commitment_tx_fee
+	} else {
+		commitment_tx_fee + htlc_success_tx_weight(channel_type_features) * feerate_per_kw as u64 / 1000
 	}
 }