Updated on 2026-08-14

features/onboarding-v2/impl/src/main/kotlin/com/tangem/features/onboarding/v2/multiwallet/impl/child/seedphrase/model/MnemonicRepository.kt

@@ -9,7 +9,7 @@ import com.tangem.sdk.extensions.getWordlist
 import dagger.hilt.android.qualifiers.ApplicationContext
 import javax.inject.Inject
 
-class MnemonicRepository @Inject constructor(
+internal class MnemonicRepository @Inject constructor(
     @ApplicationContext private val context: Context,
 ) {
     private val wordlist = Wordlist.getWordlist(context)

features/onboarding-v2/impl/src/main/kotlin/com/tangem/features/onboarding/v2/multiwallet/impl/child/seedphrase/model/MultiWalletSeedPhraseModel.kt

@@ -50,8 +50,8 @@ internal class MultiWalletSeedPhraseModel @Inject constructor(
 
     private val params = paramsContainer.require<MultiWalletChildParams>()
     private val multiWalletState get() = params.multiWalletState
-    private val state = MutableStateFlow(SeedPhraseState())
-    private val _uiState = MutableStateFlow(getStartState())
+    private val state = MutableStateFlow(getInitialSeedPhraseState())
+    private val _uiState = MutableStateFlow(getInitialUIState())
 
     private val generateSeedPhraseUiStateBuilder = GenerateSeedPhraseUiStateBuilder(
         updateUiState = { block -> updateUiStateSpecific(block) },
@@ -60,7 +60,9 @@ internal class MultiWalletSeedPhraseModel @Inject constructor(
         // =============================================
         // | DON'T FIXME  !!! MODIFY WITH CAUTION !!!  |
         // =============================================
-        changeWords24Option = { state.update { it.copy(words24Option = it.words24Option) } },
+        changeGeneratedWordsType = { newType ->
+            state.update { st -> st.copy(generatedWordsType = newType) }
+        },
         // =============================================
     )
 
@@ -75,10 +77,9 @@ internal class MultiWalletSeedPhraseModel @Inject constructor(
         // =============================================
         importWallet = importWallet@{
             importWallet(
-                mnemonic = if (state.value.words24Option) {
-                    state.value.generatedWords24 ?: return@importWallet
-                } else {
-                    state.value.generatedWords12 ?: return@importWallet
+                mnemonic = when (state.value.generatedWordsType) {
+                    GeneratedWordsType.Words12 -> state.value.generatedWords12 ?: return@importWallet
+                    GeneratedWordsType.Words24 -> state.value.generatedWords24 ?: return@importWallet
                 },
                 passphrase = null,
                 generatedSeedPhrase = true,
@@ -91,6 +92,7 @@ internal class MultiWalletSeedPhraseModel @Inject constructor(
         modelScope = modelScope,
         mnemonicRepository = mnemonicRepository,
         updateUiState = { block -> updateUiStateSpecific(block) },
+        readyToImport = { ready -> state.update { it.copy(readyToImport = ready) } },
         importWallet = { mnemonic, passphrase ->
             importWallet(
                 mnemonic = mnemonic,
@@ -112,8 +114,8 @@ internal class MultiWalletSeedPhraseModel @Inject constructor(
             is MultiWalletSeedPhraseUM.Import,
             is MultiWalletSeedPhraseUM.GenerateSeedPhrase,
             -> {
-                _uiState.value = getStartState()
-                state.value = SeedPhraseState()
+                _uiState.value = getInitialUIState()
+                state.value = getInitialSeedPhraseState()
             }
             is MultiWalletSeedPhraseUM.GeneratedWordsCheck -> {
                 openGeneratedSeedPhrase()
@@ -121,7 +123,16 @@ internal class MultiWalletSeedPhraseModel @Inject constructor(
         }
     }
 
-    private fun getStartState(): MultiWalletSeedPhraseUM {
+    private fun getInitialSeedPhraseState(): SeedPhraseState {
+        return SeedPhraseState(
+            generatedWords12 = null,
+            generatedWords24 = null,
+            generatedWordsType = GeneratedWordsType.Words12,
+            readyToImport = false,
+        )
+    }
+
+    private fun getInitialUIState(): MultiWalletSeedPhraseUM {
         return MultiWalletSeedPhraseUM.Start(
             onImportSeedPhraseClicked = {
                 openImportSeedPhrase()
@@ -143,6 +154,7 @@ internal class MultiWalletSeedPhraseModel @Inject constructor(
         _uiState.value = generateSeedPhraseUiStateBuilder.getState(
             generatedWords12 = words12,
             generatedWords24 = words24,
+            option = state.value.generatedWordsType,
         )
     }
 

features/onboarding-v2/impl/src/main/kotlin/com/tangem/features/onboarding/v2/multiwallet/impl/child/seedphrase/model/SeedPhraseState.kt

@@ -2,9 +2,14 @@ package com.tangem.features.onboarding.v2.multiwallet.impl.child.seedphrase.mode
 
 import com.tangem.crypto.bip39.Mnemonic
 
-data class SeedPhraseState(
-    val generatedWords12: Mnemonic? = null,
-    val generatedWords24: Mnemonic? = null,
-    val words24Option: Boolean = false,
-    val readyToImport: Boolean = false,
-)
+internal data class SeedPhraseState(
+    val generatedWords12: Mnemonic?,
+    val generatedWords24: Mnemonic?,
+    val generatedWordsType: GeneratedWordsType,
+    val readyToImport: Boolean,
+)
+
+internal enum class GeneratedWordsType(val length: Int) {
+    Words12(12),
+    Words24(24),
+}

features/onboarding-v2/impl/src/main/kotlin/com/tangem/features/onboarding/v2/multiwallet/impl/child/seedphrase/model/builder/GenerateSeedPhraseUiStateBuilder.kt

@@ -1,19 +1,24 @@
 package com.tangem.features.onboarding.v2.multiwallet.impl.child.seedphrase.model.builder
 
 import com.tangem.crypto.bip39.Mnemonic
+import com.tangem.features.onboarding.v2.multiwallet.impl.child.seedphrase.model.GeneratedWordsType
 import com.tangem.features.onboarding.v2.multiwallet.impl.child.seedphrase.ui.state.MultiWalletSeedPhraseUM
 import kotlinx.collections.immutable.ImmutableList
 import kotlinx.collections.immutable.toImmutableList
 
 internal class GenerateSeedPhraseUiStateBuilder(
-    private val changeWords24Option: (Boolean) -> Unit,
+    private val changeGeneratedWordsType: (GeneratedWordsType) -> Unit,
     private val updateUiState: (
         (MultiWalletSeedPhraseUM.GenerateSeedPhrase) -> MultiWalletSeedPhraseUM.GenerateSeedPhrase,
     ) -> Unit,
     private val onContinue: () -> Unit,
 ) {
 
-    fun getState(generatedWords12: Mnemonic, generatedWords24: Mnemonic): MultiWalletSeedPhraseUM.GenerateSeedPhrase {
+    fun getState(
+        generatedWords12: Mnemonic,
+        generatedWords24: Mnemonic,
+        option: GeneratedWordsType,
+    ): MultiWalletSeedPhraseUM.GenerateSeedPhrase {
         val words12 = generatedWords12.mnemonicComponents.mapIndexed { index, s ->
             MultiWalletSeedPhraseUM.GenerateSeedPhrase.MnemonicGridItem(index + 1, s)
         }.toImmutableList()
@@ -22,26 +27,35 @@ internal class GenerateSeedPhraseUiStateBuilder(
         }.toImmutableList()
 
         return MultiWalletSeedPhraseUM.GenerateSeedPhrase(
-            words24OptionSelected = false,
-            words = words12,
-            onWords24OptionSwitch = { switchType(words12, words24) },
+            option = option,
+            words = when (option) {
+                GeneratedWordsType.Words12 -> words12
+                GeneratedWordsType.Words24 -> words24
+            },
+            onOptionChange = {
+                switchType(
+                    newType = it,
+                    generatedWords12 = words12,
+                    generatedWords24 = words24,
+                )
+            },
             onContinueClick = onContinue,
         )
     }
 
     private fun switchType(
+        newType: GeneratedWordsType,
         generatedWords12: ImmutableList<MultiWalletSeedPhraseUM.GenerateSeedPhrase.MnemonicGridItem>,
         generatedWords24: ImmutableList<MultiWalletSeedPhraseUM.GenerateSeedPhrase.MnemonicGridItem>,
     ) {
         updateUiState { uiSt ->
-            changeWords24Option(uiSt.words24OptionSelected.not())
+            changeGeneratedWordsType(newType)
 
             uiSt.copy(
-                words24OptionSelected = uiSt.words24OptionSelected.not(),
-                words = if (uiSt.words24OptionSelected) {
-                    generatedWords12
-                } else {
-                    generatedWords24
+                option = newType,
+                words = when (newType) {
+                    GeneratedWordsType.Words12 -> generatedWords12
+                    GeneratedWordsType.Words24 -> generatedWords24
                 },
             )
         }

features/onboarding-v2/impl/src/main/kotlin/com/tangem/features/onboarding/v2/multiwallet/impl/child/seedphrase/model/builder/ImportSeedPhraseUiStateBuilder.kt

@@ -20,6 +20,7 @@ import kotlinx.coroutines.launch
 internal class ImportSeedPhraseUiStateBuilder(
     private val modelScope: CoroutineScope,
     private val mnemonicRepository: MnemonicRepository,
+    private val readyToImport: (Boolean) -> Unit,
     private val updateUiState: ((MultiWalletSeedPhraseUM.Import) -> MultiWalletSeedPhraseUM.Import) -> Unit,
     private val importWallet: (mnemonic: Mnemonic, passphrase: String?) -> Unit,
 ) {
@@ -100,6 +101,8 @@ internal class ImportSeedPhraseUiStateBuilder(
     }
 
     private fun interceptWords(wordsField: TextFieldValue) {
+        readyToImport(false)
+
         updateUiState {
             it.copy(
                 createWalletEnabled = false,
@@ -133,7 +136,9 @@ internal class ImportSeedPhraseUiStateBuilder(
                     createWalletEnabled = true,
                 )
             }
+            readyToImport(true)
         } catch (ex: TangemSdkError.MnemonicException) {
+            readyToImport(false)
             val error = ex.mnemonicResult
             if (error is MnemonicErrorResult.InvalidChecksum) {
                 updateUiState {

features/onboarding-v2/impl/src/main/kotlin/com/tangem/features/onboarding/v2/multiwallet/impl/child/seedphrase/model/builder/SeedPhraseCheckUiStateBuilder.kt

@@ -1,6 +1,7 @@
 package com.tangem.features.onboarding.v2.multiwallet.impl.child.seedphrase.model.builder
 
 import androidx.compose.ui.text.input.TextFieldValue
+import com.tangem.features.onboarding.v2.multiwallet.impl.child.seedphrase.model.GeneratedWordsType
 import com.tangem.features.onboarding.v2.multiwallet.impl.child.seedphrase.model.SeedPhraseState
 import com.tangem.features.onboarding.v2.multiwallet.impl.child.seedphrase.ui.state.MultiWalletSeedPhraseUM
 import kotlinx.collections.immutable.toImmutableList
@@ -93,10 +94,9 @@ internal class SeedPhraseCheckUiStateBuilder(
         currentState.generatedWords12 ?: return false
         currentState.generatedWords24 ?: return false
 
-        val wordList = if (currentState.words24Option) {
-            currentState.generatedWords24
-        } else {
-            currentState.generatedWords12
+        val wordList = when (currentState.generatedWordsType) {
+            GeneratedWordsType.Words12 -> currentState.generatedWords12
+            GeneratedWordsType.Words24 -> currentState.generatedWords24
         }.mnemonicComponents
 
         return wordList[shownIndex - 1] == word

features/onboarding-v2/impl/src/main/kotlin/com/tangem/features/onboarding/v2/multiwallet/impl/child/seedphrase/ui/MultiWalletSeedPhraseWords.kt

@@ -19,6 +19,7 @@ import com.tangem.core.ui.extensions.stringResourceSafe
 import com.tangem.core.ui.res.TangemTheme
 import com.tangem.core.ui.res.TangemThemePreview
 import com.tangem.features.onboarding.v2.impl.R
+import com.tangem.features.onboarding.v2.multiwallet.impl.child.seedphrase.model.GeneratedWordsType
 import com.tangem.features.onboarding.v2.multiwallet.impl.child.seedphrase.ui.state.MultiWalletSeedPhraseUM
 import com.tangem.features.onboarding.v2.multiwallet.impl.child.seedphrase.ui.state.MultiWalletSeedPhraseUM.GenerateSeedPhrase.MnemonicGridItem
 import kotlinx.collections.immutable.ImmutableList
@@ -67,19 +68,24 @@ internal fun MultiWalletSeedPhraseWords(
 private fun SegmentSeedBlock(state: MultiWalletSeedPhraseUM.GenerateSeedPhrase, modifier: Modifier = Modifier) {
     SegmentedButtons(
         modifier = modifier.padding(horizontal = TangemTheme.dimens.spacing76),
-        config = persistentListOf(0, 1),
-        initialSelectedItem = if (state.words24OptionSelected.not()) 0 else 1,
+        config = persistentListOf(GeneratedWordsType.Words12, GeneratedWordsType.Words24),
+        initialSelectedItem = state.option,
         onClick = {
-            if (state.words24OptionSelected && it == 0 || state.words24OptionSelected.not() && it == 1) {
-                state.onWords24OptionSwitch()
+            when {
+                state.option == GeneratedWordsType.Words12 && it == GeneratedWordsType.Words24 -> {
+                    state.onOptionChange(it)
+                }
+                state.option == GeneratedWordsType.Words24 && it == GeneratedWordsType.Words12 -> {
+                    state.onOptionChange(it)
+                }
             }
         },
     ) {
         Text(
             text = pluralStringResourceSafe(
                 id = R.plurals.onboarding_seed_generate_words_count,
-                count = if (it == 0) 12 else 24,
-                if (it == 0) 12 else 24,
+                count = state.option.length,
+                state.option.length,
             ),
             modifier = Modifier
                 .padding(vertical = TangemTheme.dimens.spacing10)
@@ -110,8 +116,8 @@ private fun TitleBlock(state: MultiWalletSeedPhraseUM.GenerateSeedPhrase, modifi
         Text(
             text = pluralStringResourceSafe(
                 id = R.plurals.onboarding_seed_generate_message_words_count,
-                count = if (state.words24OptionSelected.not()) 12 else 24,
-                if (state.words24OptionSelected.not()) 12 else 24,
+                count = state.option.length,
+                state.option.length,
             ),
             style = TangemTheme.typography.body1,
             color = TangemTheme.colors.text.secondary,

features/onboarding-v2/impl/src/main/kotlin/com/tangem/features/onboarding/v2/multiwallet/impl/child/seedphrase/ui/state/MultiWalletSeedPhraseUM.kt

@@ -4,6 +4,7 @@ import androidx.compose.runtime.Immutable
 import androidx.compose.ui.text.input.TextFieldValue
 import com.tangem.core.ui.components.bottomsheets.TangemBottomSheetConfig
 import com.tangem.core.ui.extensions.TextReference
+import com.tangem.features.onboarding.v2.multiwallet.impl.child.seedphrase.model.GeneratedWordsType
 import com.tangem.features.onboarding.v2.multiwallet.impl.common.ui.OnboardingDialogUM
 import kotlinx.collections.immutable.ImmutableList
 import kotlinx.collections.immutable.persistentListOf
@@ -20,9 +21,9 @@ internal sealed class MultiWalletSeedPhraseUM(
     ) : MultiWalletSeedPhraseUM(order = 0)
 
     data class GenerateSeedPhrase(
-        val words24OptionSelected: Boolean = false,
+        val option: GeneratedWordsType = GeneratedWordsType.Words12,
         val words: ImmutableList<MnemonicGridItem> = persistentListOf(),
-        val onWords24OptionSwitch: () -> Unit = {},
+        val onOptionChange: (GeneratedWordsType) -> Unit = {},
         val onContinueClick: () -> Unit = {},
     ) : MultiWalletSeedPhraseUM(order = 1) {
         data class MnemonicGridItem(