+ #[cfg(debug_assertions)]
+ let total_satisfaction_weight = must_spend_satisfaction_weight +
+ coin_selection.confirmed_utxos.iter().map(|utxo| utxo.satisfaction_weight).sum::<u64>();
+ #[cfg(debug_assertions)]
+ let total_input_amount = must_spend_amount +
+ coin_selection.confirmed_utxos.iter().map(|utxo| utxo.output.value).sum::<u64>();
+
+ self.process_coin_selection(&mut htlc_tx, &coin_selection);
+
+ // construct psbt
+ let mut htlc_psbt = PartiallySignedTransaction::from_unsigned_tx(htlc_tx).unwrap();
+ // add witness_utxo to htlc inputs
+ for (i, htlc_descriptor) in htlc_descriptors.iter().enumerate() {
+ debug_assert_eq!(htlc_psbt.unsigned_tx.input[i].previous_output, htlc_descriptor.outpoint());
+ htlc_psbt.inputs[i].witness_utxo = Some(htlc_descriptor.previous_utxo(&self.secp));
+ }
+ // add witness_utxo to remaining inputs
+ for (idx, utxo) in coin_selection.confirmed_utxos.into_iter().enumerate() {
+ // offset to skip the htlc inputs
+ let index = idx + htlc_descriptors.len();
+ debug_assert_eq!(htlc_psbt.unsigned_tx.input[index].previous_output, utxo.outpoint);
+ if utxo.output.script_pubkey.is_witness_program() {
+ htlc_psbt.inputs[index].witness_utxo = Some(utxo.output);
+ }
+ }
+
+ #[cfg(debug_assertions)]
+ let unsigned_tx_weight = htlc_psbt.unsigned_tx.weight().to_wu() - (htlc_psbt.unsigned_tx.input.len() as u64 * EMPTY_SCRIPT_SIG_WEIGHT);
+
+ log_debug!(self.logger, "Signing HTLC transaction {}", htlc_psbt.unsigned_tx.txid());
+ htlc_tx = self.utxo_source.sign_psbt(htlc_psbt)?;
+