demo: add initial balance view

demo/android/src/main/kotlin/im/molly/monero/demo/common/Result.kt

@@ -12,7 +12,7 @@ import kotlinx.coroutines.flow.onStart
 sealed interface Result<out T> {
     data class Success<T>(val data: T) : Result<T>
     data class Error(val exception: Throwable? = null) : Result<Nothing>
-    object Loading : Result<Nothing>
+    data object Loading : Result<Nothing>
 }
 
 /**

demo/android/src/main/kotlin/im/molly/monero/demo/ui/HomeViewModel.kt

@@ -21,16 +21,16 @@ class HomeViewModel(
 }
 
 sealed interface HomeUiState {
-    object Loading : HomeUiState
+    data object Loading : HomeUiState
 
 //    data class Ready(
 //        val wallets: List<WalletDetails>
 //    ) : HomeUiState
 
-    object Empty : HomeUiState
+    data object Empty : HomeUiState
 }
 
 sealed interface WalletListUiState {
     data class Success(val ids: List<Long>) : WalletListUiState
-    object Loading : WalletListUiState
+    data object Loading : WalletListUiState
 }

demo/android/src/main/kotlin/im/molly/monero/demo/ui/SettingsViewModel.kt

@@ -98,5 +98,5 @@ sealed interface SettingsUiState {
         val remoteNodes: List<RemoteNode>,
     ) : SettingsUiState
 
-    object Loading : SettingsUiState
+    data object Loading : SettingsUiState
 }

demo/android/src/main/kotlin/im/molly/monero/demo/ui/WalletBalanceView.kt

@@ -0,0 +1,127 @@
+package im.molly.monero.demo.ui
+
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.material3.Divider
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+import im.molly.monero.MoneroAmount
+import im.molly.monero.Balance
+import im.molly.monero.BlockchainTime
+import im.molly.monero.MoneroCurrency
+import im.molly.monero.TimeLocked
+import im.molly.monero.demo.ui.theme.AppTheme
+import im.molly.monero.xmr
+import kotlinx.coroutines.delay
+import java.math.BigDecimal
+import java.time.Duration
+import java.time.Instant
+import kotlin.time.Duration.Companion.seconds
+import kotlin.time.toKotlinDuration
+
+@Composable
+fun WalletBalanceView(
+    balance: Balance,
+    blockchainTime: BlockchainTime,
+    modifier: Modifier = Modifier,
+) {
+    var now by remember { mutableStateOf(Instant.now()) }
+
+    LaunchedEffect(now) {
+        delay(1.seconds)
+        now = Instant.now()
+    }
+
+    Column(
+        modifier = modifier
+            .fillMaxWidth()
+            .padding(16.dp)
+    ) {
+        Text(
+            style = MaterialTheme.typography.headlineSmall,
+            text = "Balance at Block #${blockchainTime.height}",
+        )
+
+        BalanceRow("Confirmed", balance.confirmedAmount)
+        BalanceRow("Pending", balance.pendingAmount)
+        Divider()
+        BalanceRow("Total", balance.totalAmount)
+
+        BalanceRow("Unlocked", balance.unlockedAmountAt(blockchainTime.height, now))
+        balance.lockedAmountsAt(blockchainTime.height, now).forEach { (timeSpan, amount) ->
+            LockedBalanceRow("Locked", amount, timeSpan.blocks, timeSpan.timeRemaining)
+        }
+    }
+}
+
+@Composable
+fun BalanceRow(
+    label: String,
+    amount: MoneroAmount,
+    format: MoneroCurrency.Format = MoneroCurrency.Format(),
+) {
+    Row(
+        modifier = Modifier
+            .fillMaxWidth()
+            .padding(vertical = 8.dp),
+        horizontalArrangement = Arrangement.SpaceBetween,
+    ) {
+        Text(text = label)
+        Text(text = format.format(amount))
+    }
+}
+
+@Composable
+fun LockedBalanceRow(
+    label: String,
+    amount: MoneroAmount,
+    blockCount: Int,
+    timeRemaining: Duration,
+    moneroFormat: MoneroCurrency.Format = MoneroCurrency.DefaultFormat,
+) {
+    Row(
+        modifier = Modifier
+            .fillMaxWidth()
+            .padding(vertical = 8.dp),
+        horizontalArrangement = Arrangement.SpaceBetween,
+    ) {
+        val durationText =
+            "${timeRemaining.toKotlinDuration()} ($blockCount blocks)"
+        Column {
+            Text(text = label)
+            Text(text = durationText, fontSize = 12.sp)
+        }
+        Text(text = moneroFormat.format(amount))
+    }
+}
+
+@Preview
+@Composable
+fun WalletBalanceDetailsPreview() {
+    AppTheme {
+        WalletBalanceView(
+            balance = Balance(
+                pendingAmount = 5.xmr,
+                timeLockedAmounts = listOf(
+                    TimeLocked(10.xmr, BlockchainTime.Genesis),
+                    TimeLocked(BigDecimal("0.000000000001").xmr, BlockchainTime.Block(10)),
+                    TimeLocked(30.xmr, BlockchainTime.Block(500)),
+                ),
+            ),
+            blockchainTime = BlockchainTime.Genesis,
+        )
+    }
+}

demo/android/src/main/kotlin/im/molly/monero/demo/ui/WalletScreen.kt

@@ -113,11 +113,16 @@ private fun WalletScreenPopulated(
                 text = buildAnnotatedString {
                     append(MoneroCurrency.SYMBOL + " ")
                     withStyle(style = SpanStyle(fontWeight = FontWeight.Bold)) {
-                        append(MoneroCurrency.Formatter(precision = 5).format(ledger.balance.confirmedAmount))
+                        append(MoneroCurrency.Format(precision = 5).format(ledger.balance.confirmedAmount))
                     }
                 }
             )
             Text(text = walletConfig.name, style = MaterialTheme.typography.headlineSmall)
+
+            WalletBalanceView(
+                balance = ledger.balance,
+                blockchainTime = ledger.checkedAt,
+            )
         }
 
         if (showRenameDialog) {

demo/android/src/main/kotlin/im/molly/monero/demo/ui/WalletViewModel.kt

@@ -71,6 +71,6 @@ sealed interface WalletUiState {
         val ledger: Ledger,
     ) : WalletUiState
 
-    object Error : WalletUiState
+    data object Error : WalletUiState
-    object Loading : WalletUiState
+    data object Loading : WalletUiState
 }

lib/android/src/main/kotlin/im/molly/monero/MoneroCurrency.kt

@@ -8,9 +8,9 @@ object MoneroCurrency {
 
     const val MAX_PRECISION = MoneroAmount.ATOMIC_UNIT_SCALE
 
-    val DefaultFormatter = Formatter()
+    val DefaultFormat = Format()
 
-    data class Formatter(
+    data class Format(
         val precision: Int = MAX_PRECISION,
         val locale: Locale = Locale.US,
     ) {