chore: Show settle transaction txid on dlc channels api

crates/ln-dlc-node/src/ln/dlc_channel_details.rs

@@ -75,6 +75,23 @@ impl From<Channel> for DlcChannelDetails {
                     Some(fund_tx.txid().to_string()),
                     Some(fund_output_index),
                     Some(close_tx.txid().to_string())),
+                Channel::Signed(SignedChannel {
+                    update_idx,
+                    fee_rate_per_vb,
+                    fund_tx,
+                    fund_output_index,
+                    state: dlc_manager::channel::signed_channel::SignedChannelState::SettledClosing {
+                        settle_transaction,
+                        ..
+                    },
+                    ..
+                }) => (
+                    Some(update_idx),
+                    Some(SignedChannelState::SettledClosing),
+                    Some(fee_rate_per_vb),
+                    Some(fund_tx.txid().to_string()),
+                    Some(fund_output_index),
+                    Some(settle_transaction.txid().to_string())),
                 Channel::Signed(signed_channel) => (
                     Some(signed_channel.update_idx),
                     Some(SignedChannelState::from(signed_channel.state)),

mobile/lib/common/dlc_channel_change_notifier.dart

@@ -64,6 +64,13 @@ class DlcChannelChangeNotifier extends ChangeNotifier {
         .toList();
   }
 
+  List<SettledClosingDlcChannel> getAllSettledClosingDlcChannels() {
+    return channels
+        .where((channel) => channel.state == ChannelState.settledClosing)
+        .map((channel) => channel as SettledClosingDlcChannel)
+        .toList();
+  }
+
   List<ClosedDlcChannel> getAllClosedDlcChannels() {
     return channels
         .where((channel) => [

mobile/lib/common/domain/dlc_channel.dart

@@ -50,7 +50,7 @@ class DlcChannel {
         {
           return SettledClosingDlcChannel(
             id: dlcChannel.dlcChannelId,
-            state: ChannelState.closing,
+            state: ChannelState.settledClosing,
             settleTxid: closing.settleTxid,
           );
         }
@@ -182,6 +182,7 @@ enum ChannelState {
   accepted,
   signed,
   closing,
+  settledClosing,
   closed,
   counterClosed,
   closedPunished,
@@ -201,6 +202,8 @@ enum ChannelState {
         return "Signed";
       case ChannelState.closing:
         return "Closing";
+      case ChannelState.settledClosing:
+        return "Settled Closing";
       case ChannelState.closed:
         return "Closed";
       case ChannelState.counterClosed:

mobile/lib/common/settings/channel_screen.dart

@@ -46,6 +46,7 @@ class _ChannelScreenState extends State<ChannelScreen> {
       ...dlcChannelChangeNotifier.getAllAcceptedDlcChannels(),
       ...dlcChannelChangeNotifier.getAllCancelledDlcChannels(),
       ...dlcChannelChangeNotifier.getAllClosingDlcChannels(),
+      ...dlcChannelChangeNotifier.getAllSettledClosingDlcChannels(),
       ...dlcChannelChangeNotifier.getAllClosedDlcChannels(),
       ...dlcChannelChangeNotifier.getAllOtherDlcChannels()
     ];
@@ -223,6 +224,11 @@ class ChannelsTile extends StatelessWidget {
                         leading: const Text('Buffer TXID', style: TextStyle(fontSize: 17)),
                         title: TransactionIdText(channel.bufferTxid))
                     : Container(),
+                channel is SettledClosingDlcChannel
+                    ? ListTile(
+                        leading: const Text('Settle TXID', style: TextStyle(fontSize: 17)),
+                        title: TransactionIdText(channel.settleTxid))
+                    : Container(),
                 channel is ClosedDlcChannel
                     ? ListTile(
                         leading: const Text('Closing TXID', style: TextStyle(fontSize: 17)),

mobile/native/src/dlc_channel.rs

@@ -32,6 +32,21 @@ impl From<&Channel> for DlcChannel {
                 closing_txid: Some(close_tx.txid().to_string()),
                 state: SignedChannelState::CollaborativeCloseOffered,
             },
+            s @ Channel::Signed(SignedChannel {
+                state: dlc_manager::channel::signed_channel::SignedChannelState::SettledClosing {
+                    settle_transaction,
+                    ..
+                },
+                fund_tx,
+                fund_output_index,
+                ..
+            }) => ChannelState::Signed {
+                contract_id: s.get_contract_id().map(hex::encode),
+                funding_txid: fund_tx.txid().to_string(),
+                funding_tx_vout: *fund_output_index,
+                closing_txid: Some(settle_transaction.txid().to_string()),
+                state: SignedChannelState::SettledClosing,
+            },
             Channel::Signed(s) => ChannelState::Signed {
                 contract_id: s.get_contract_id().map(hex::encode),
                 funding_txid: s.fund_tx.txid().to_string(),

webapp/frontend/lib/settings/channel_screen.dart

@@ -146,6 +146,7 @@ class _ChannelDetailWidgetState extends State<ChannelDetailWidget> {
                 buildCopyableTxId(context, "Funding TxId", widget.channel.fundTxid),
                 buildCopyableTxId(context, "Buffer TxId", widget.channel.bufferTxid),
                 buildCopyableTxId(context, "Close TxId", widget.channel.closeTxid),
+                buildCopyableTxId(context, "Settle TxId", widget.channel.settleTxid),
                 Visibility(
                     visible: widget.channel.channelState == ChannelState.signed &&
                         widget.channel.signedChannelState != null &&

webapp/src/api.rs

@@ -634,9 +634,9 @@ impl From<&dlc_manager::channel::Channel> for DlcChannel {
                         settle_transaction, ..
                     } => (
                         SignedChannelState::Closing,
-                        None,
                         Some(settle_transaction),
                         None,
+                        None,
                     ),
                     dlc_manager::channel::signed_channel::SignedChannelState::CollaborativeCloseOffered { close_tx, .. } => (
                         SignedChannelState::CollaborativeCloseOffered,