Add closed channels

Author: ben-kaufman

app/src/main/java/to/bitkit/services/LightningService.kt

@@ -1,5 +1,7 @@
 package to.bitkit.services
 
+import com.synonym.bitkitcore.ClosedChannelDetails
+import com.synonym.bitkitcore.upsertClosedChannel
 import kotlinx.coroutines.CoroutineDispatcher
 import kotlinx.coroutines.currentCoroutineContext
 import kotlinx.coroutines.delay
@@ -57,6 +59,7 @@ import kotlin.time.Duration.Companion.seconds
 
 typealias NodeEventHandler = suspend (Event) -> Unit
 
+@Suppress("LargeClass")
 @Singleton
 class LightningService @Inject constructor(
     @BgDispatcher private val bgDispatcher: CoroutineDispatcher,
@@ -70,6 +73,8 @@ class LightningService @Inject constructor(
 
     private lateinit var trustedPeers: List<PeerDetails>
 
+    private val channelCache = mutableMapOf<String, ChannelDetails>()
+
     suspend fun setup(
         walletIndex: Int,
         customServerUrl: String? = null,
@@ -190,6 +195,7 @@ class LightningService @Inject constructor(
             }
         }
 
+        refreshChannelCache()
         Logger.info("Node started")
     }
 
@@ -225,9 +231,73 @@ class LightningService @Inject constructor(
             node.syncWallets()
             // launch { setMaxDustHtlcExposureForCurrentChannels() }
         }
+        refreshChannelCache()
+
         Logger.debug("LDK synced")
     }
 
+    private suspend fun refreshChannelCache() {
+        val node = this.node ?: return
+
+        ServiceQueue.LDK.background {
+            val channels = node.listChannels()
+            channels.forEach { channel ->
+                channelCache[channel.channelId] = channel
+            }
+        }
+    }
+
+    private suspend fun registerClosedChannel(channelId: String, reason: String?) {
+        try {
+            val channel = ServiceQueue.LDK.background {
+                channelCache[channelId]?.also {
+                    channelCache.remove(channelId)
+                }
+            } ?: run {
+                Logger.error(
+                    "Could not find channel details for closed channel: channelId=$channelId",
+                    context = TAG
+                )
+                return@registerClosedChannel
+            }
+
+            val channelName = channel.inboundScidAlias?.toString()
+                ?: channel.channelId.take(10) + "…"
+
+            val fundingTxo = channel.fundingTxo
+            if (fundingTxo == null) {
+                Logger.error("Channel has no funding transaction", context = TAG)
+                return
+            }
+
+            val closedAt = (System.currentTimeMillis() / 1000L).toULong()
+
+            val closedChannel = ClosedChannelDetails(
+                channelId = channel.channelId,
+                counterpartyNodeId = channel.counterpartyNodeId,
+                fundingTxoTxid = fundingTxo.txid,
+                fundingTxoIndex = fundingTxo.vout,
+                channelValueSats = channel.channelValueSats,
+                closedAt = closedAt,
+                outboundCapacityMsat = channel.outboundCapacityMsat,
+                inboundCapacityMsat = channel.inboundCapacityMsat,
+                counterpartyUnspendablePunishmentReserve = channel.counterpartyUnspendablePunishmentReserve,
+                unspendablePunishmentReserve = channel.unspendablePunishmentReserve ?: 0u,
+                forwardingFeeProportionalMillionths = channel.config.forwardingFeeProportionalMillionths,
+                forwardingFeeBaseMsat = channel.config.forwardingFeeBaseMsat,
+                channelName = channelName,
+                channelClosureReason = reason ?: ""
+            )
+
+            ServiceQueue.CORE.background {
+                upsertClosedChannel(closedChannel)
+            }
+            Logger.info("Registered closed channel: ${channel.userChannelId}", context = TAG)
+        } catch (e: Exception) {
+            Logger.error("Failed to register closed channel: $e", e, context = TAG)
+        }
+    }
+
     // private fun setMaxDustHtlcExposureForCurrentChannels() {
     //     if (Env.network != Network.REGTEST) {
     //         Logger.debug("Not updating channel config for non-regtest network")
@@ -738,6 +808,9 @@ class LightningService @Inject constructor(
                 Logger.info(
                     "⏳ Channel pending: channelId: $channelId userChannelId: $userChannelId formerTemporaryChannelId: $formerTemporaryChannelId counterpartyNodeId: $counterpartyNodeId fundingTxo: $fundingTxo"
                 )
+                launch {
+                    refreshChannelCache()
+                }
             }
 
             is Event.ChannelReady -> {
@@ -747,16 +820,22 @@ class LightningService @Inject constructor(
                 Logger.info(
                     "👐 Channel ready: channelId: $channelId userChannelId: $userChannelId counterpartyNodeId: $counterpartyNodeId"
                 )
+                launch {
+                    refreshChannelCache()
+                }
             }
 
             is Event.ChannelClosed -> {
                 val channelId = event.channelId
                 val userChannelId = event.userChannelId
                 val counterpartyNodeId = event.counterpartyNodeId ?: "?"
-                val reason = event.reason
+                val reason = event.reason?.toString() ?: ""
                 Logger.info(
                     "⛔ Channel closed: channelId: $channelId userChannelId: $userChannelId counterpartyNodeId: $counterpartyNodeId reason: $reason"
                 )
+                launch {
+                    registerClosedChannel(channelId, reason)
+                }
             }
         }
     }

app/src/main/java/to/bitkit/ui/settings/lightning/ChannelDetailScreen.kt

@@ -97,6 +97,8 @@ fun ChannelDetailScreen(
 
     val uiState by viewModel.uiState.collectAsStateWithLifecycle()
     val paidOrders by viewModel.blocktankRepo.blocktankState.collectAsStateWithLifecycle()
+
+    val isClosedChannel = uiState.closedChannels.any { it.details.channelId == channel.details.channelId }
     val txDetails by viewModel.txDetails.collectAsStateWithLifecycle()
     val walletState by wallet.uiState.collectAsStateWithLifecycle()
 
@@ -113,6 +115,7 @@ fun ChannelDetailScreen(
         cjitEntries = paidOrders.cjitEntries,
         txDetails = txDetails,
         isRefreshing = uiState.isRefreshing,
+        isClosedChannel = isClosedChannel,
         onBack = { navController.popBackStack() },
         onClose = { navController.navigateToHome() },
         onRefresh = {
@@ -137,13 +140,15 @@ fun ChannelDetailScreen(
 }
 
 @OptIn(ExperimentalMaterial3Api::class)
+@Suppress("CyclomaticComplexMethod")
 @Composable
 private fun Content(
     channel: ChannelUi,
     blocktankOrders: List<IBtOrder> = emptyList(),
     cjitEntries: List<IcJitEntry> = emptyList(),
     txDetails: TxDetails? = null,
     isRefreshing: Boolean = false,
+    isClosedChannel: Boolean = false,
     onBack: () -> Unit = {},
     onClose: () -> Unit = {},
     onRefresh: () -> Unit = {},
@@ -201,7 +206,7 @@ private fun Content(
                     capacity = capacity,
                     localBalance = localBalance,
                     remoteBalance = remoteBalance,
-                    status = getChannelStatus(channel, blocktankOrder),
+                    status = getChannelStatus(channel, blocktankOrder, isClosedChannel),
                 )
                 VerticalSpacer(32.dp)
                 HorizontalDivider()
@@ -211,6 +216,7 @@ private fun Content(
                 ChannelStatusView(
                     channel = channel,
                     blocktankOrder = blocktankOrder,
+                    isClosedChannel = isClosedChannel,
                 )
                 VerticalSpacer(16.dp)
                 HorizontalDivider()
@@ -447,16 +453,15 @@ private fun Content(
                     onClick = { onCopyText(channel.details.counterpartyNodeId) }
                 )
 
-                // TODO add closure reason when tracking closed channels
-                // val channelClosureReason: String? = null
-                // if (channelClosureReason != null) {
-                //     SectionRow(
-                //         name = stringResource(R.string.lightning__closure_reason),
-                //         valueContent = {
-                //             CaptionB(text = channelClosureReason)
-                //         },
-                //     )
-                // }
+                // Closure reason for closed channels
+                channel.closureReason?.let { closureReason ->
+                    SectionRow(
+                        name = stringResource(R.string.lightning__closure_reason),
+                        valueContent = {
+                            CaptionB(text = closureReason)
+                        },
+                    )
+                }
 
                 // Action Buttons
                 FillHeight()
@@ -526,7 +531,12 @@ private fun SectionRow(
 private fun getChannelStatus(
     channel: ChannelUi,
     blocktankOrder: IBtOrder?,
+    isClosedChannel: Boolean = false,
 ): ChannelStatusUi {
+    if (isClosedChannel) {
+        return ChannelStatusUi.CLOSED
+    }
+
     blocktankOrder?.let { order ->
         when {
             order.state2 == BtOrderState2.EXPIRED ||

app/src/main/java/to/bitkit/ui/settings/lightning/LightningConnectionsScreen.kt

@@ -28,6 +28,7 @@ import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.alpha
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.graphics.vector.ImageVector
 import androidx.compose.ui.platform.LocalContext
@@ -63,6 +64,8 @@ import to.bitkit.ui.shared.util.shareZipFile
 import to.bitkit.ui.theme.AppThemeSurface
 import to.bitkit.ui.theme.Colors
 
+private const val CLOSED_CHANNEL_ALPHA = 0.64f
+
 object LightningConnectionsTestTags {
     const val SCREEN = "lightning_connections_screen"
     const val ADD_CONNECTION_BUTTON = "add_connection_button"
@@ -188,8 +191,21 @@ private fun Content(
                     }
                 }
 
+                // Closed Channels Section
+                AnimatedVisibility(visible = showClosed && uiState.closedChannels.isNotEmpty()) {
+                    Column {
+                        VerticalSpacer(16.dp)
+                        Caption13Up(stringResource(R.string.lightning__conn_closed), color = Colors.White64)
+                        ChannelList(
+                            status = ChannelStatusUi.CLOSED,
+                            channels = uiState.closedChannels.reversed(),
+                            onClickChannel = onClickChannel,
+                        )
+                    }
+                }
+
                 // Show/Hide Closed Channels Button
-                if (uiState.failedOrders.isNotEmpty()) {
+                if (uiState.failedOrders.isNotEmpty() || uiState.closedChannels.isNotEmpty()) {
                     VerticalSpacer(16.dp)
                     TertiaryButton(
                         text = stringResource(
@@ -295,6 +311,13 @@ private fun ChannelItem(
             .fillMaxWidth()
             .clickableAlpha { onClick() }
             .testTag("Channel")
+            .then(
+                if (status == ChannelStatusUi.CLOSED) {
+                    Modifier.alpha(CLOSED_CHANNEL_ALPHA)
+                } else {
+                    Modifier
+                }
+            )
     ) {
         VerticalSpacer(16.dp)
         Row(