Updated on 2026-08-14

app/src/main/java/com/tangem/tap/features/send/redux/SendScreenAction.kt

@@ -65,6 +65,10 @@ sealed class TransactionExtrasAction : SendScreenActionUi {
     sealed class XrpDestinationTag : TransactionExtrasAction() {
         data class HandleUserInput(val data: String) : XrpDestinationTag()
     }
+
+    sealed class TonMemo : TransactionExtrasAction() {
+        data class HandleUserInput(val data: String) : TonMemo()
+    }
 }
 
 sealed class AddressPayIdVerifyAction : SendScreenAction {

app/src/main/java/com/tangem/tap/features/send/redux/middlewares/SendMiddleware.kt

@@ -4,6 +4,7 @@ import com.google.firebase.crashlytics.FirebaseCrashlytics
 import com.tangem.blockchain.blockchains.binance.BinanceTransactionExtras
 import com.tangem.blockchain.blockchains.polkadot.ExistentialDepositProvider
 import com.tangem.blockchain.blockchains.stellar.StellarTransactionExtras
+import com.tangem.blockchain.blockchains.ton.TonTransactionExtras
 import com.tangem.blockchain.blockchains.xrp.XrpTransactionBuilder
 import com.tangem.blockchain.common.Amount
 import com.tangem.blockchain.common.BlockchainSdkError
@@ -170,6 +171,7 @@ private fun sendTransaction(
     transactionExtras.xrpDestinationTag?.tag?.let {
         txData = txData.copy(extras = XrpTransactionBuilder.XrpTransactionExtras(it))
     }
+    transactionExtras.tonMemoState?.memo?.let { txData = txData.copy(extras = TonTransactionExtras(it)) }
 
     scope.launch {
         val updateWalletResult = walletManager.safeUpdate()

app/src/main/java/com/tangem/tap/features/send/redux/reducers/TransactionExtrasReducer.kt

@@ -6,11 +6,13 @@ import com.tangem.tap.features.send.redux.SendScreenAction
 import com.tangem.tap.features.send.redux.TransactionExtrasAction.BinanceMemo
 import com.tangem.tap.features.send.redux.TransactionExtrasAction.Prepare
 import com.tangem.tap.features.send.redux.TransactionExtrasAction.Release
+import com.tangem.tap.features.send.redux.TransactionExtrasAction.TonMemo
 import com.tangem.tap.features.send.redux.TransactionExtrasAction.XlmMemo
 import com.tangem.tap.features.send.redux.TransactionExtrasAction.XrpDestinationTag
 import com.tangem.tap.features.send.redux.states.BinanceMemoState
 import com.tangem.tap.features.send.redux.states.InputViewValue
 import com.tangem.tap.features.send.redux.states.SendState
+import com.tangem.tap.features.send.redux.states.TonMemoState
 import com.tangem.tap.features.send.redux.states.TransactionExtraError
 import com.tangem.tap.features.send.redux.states.TransactionExtrasState
 import com.tangem.tap.features.send.redux.states.XlmMemoState
@@ -28,6 +30,7 @@ class TransactionExtrasReducer : SendInternalReducer {
             is XlmMemo -> handleXlmMemo(action, sendState, sendState.transactionExtrasState)
             is BinanceMemo -> handleBinanceMemo(action, sendState, sendState.transactionExtrasState)
             is XrpDestinationTag -> handleXrpTag(action, sendState, sendState.transactionExtrasState)
+            is TonMemo -> handleTonMemo(action, sendState, sendState.transactionExtrasState)
             else -> sendState
         }
     }
@@ -56,6 +59,7 @@ class TransactionExtrasReducer : SendInternalReducer {
             }
             Blockchain.Stellar -> TransactionExtrasState(xlmMemo = XlmMemoState())
             Blockchain.Binance -> TransactionExtrasState(binanceMemo = BinanceMemoState())
+            Blockchain.TON, Blockchain.TONTestnet -> TransactionExtrasState(tonMemoState = TonMemoState())
             else -> emptyResult
         }
         return updateLastState(sendState.copy(transactionExtrasState = result), result)
@@ -144,4 +148,19 @@ class TransactionExtrasReducer : SendInternalReducer {
         }
         return updateLastState(sendState.copy(transactionExtrasState = result), result)
     }
+
+    private fun handleTonMemo(
+        action: TonMemo,
+        sendState: SendState,
+        infoState: TransactionExtrasState,
+    ): SendState {
+        val result = when (action) {
+            is TonMemo.HandleUserInput -> {
+                val memo = action.data
+                val input = InputViewValue(memo, true)
+                infoState.copy(tonMemoState = TonMemoState(input, memo))
+            }
+        }
+        return updateLastState(sendState.copy(transactionExtrasState = result), result)
+    }
 }

app/src/main/java/com/tangem/tap/features/send/redux/states/AddressPayIdState.kt

@@ -30,6 +30,7 @@ data class TransactionExtrasState(
     val xlmMemo: XlmMemoState? = null,
     val binanceMemo: BinanceMemoState? = null,
     val xrpDestinationTag: XrpDestinationTagState? = null,
+    val tonMemoState: TonMemoState? = null,
 ) : IdStateHolder {
     override val stateId: StateId = StateId.TRANSACTION_EXTRAS
 }
@@ -98,6 +99,12 @@ data class XrpDestinationTagState(
     }
 }
 
+data class TonMemoState(
+    val viewFieldValue: InputViewValue = InputViewValue(""),
+    val memo: String? = null,
+    val error: TransactionExtraError? = null,
+)
+
 enum class TransactionExtraError {
     INVALID_DESTINATION_TAG,
     INVALID_XLM_MEMO,

app/src/main/java/com/tangem/tap/features/send/ui/SendFragment.kt

@@ -60,7 +60,6 @@ import com.tangem.tap.mainScope
 import com.tangem.tap.store
 import com.tangem.wallet.R
 import com.tangem.wallet.databinding.FragmentSendBinding
-import kotlinx.coroutines.ExperimentalCoroutinesApi
 import kotlinx.coroutines.channels.awaitClose
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.callbackFlow
@@ -173,6 +172,15 @@ class SendFragment : BaseStoreFragment(R.layout.fragment_send) {
             }
             .onEach { store.dispatch(TransactionExtrasAction.BinanceMemo.HandleUserInput(it)) }
             .launchIn(mainScope)
+
+        etTonMemo.inputtedTextAsFlow()
+            .debounce(400)
+            .filter {
+                val info = store.state.sendState.transactionExtrasState
+                info.tonMemoState?.viewFieldValue?.value != it
+            }
+            .onEach { store.dispatch(TransactionExtrasAction.TonMemo.HandleUserInput(it)) }
+            .launchIn(mainScope)
     }
 
     override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
@@ -331,7 +339,6 @@ class SendFragment : BaseStoreFragment(R.layout.fragment_send) {
     }
 }
 
-@ExperimentalCoroutinesApi
 fun EditText.inputtedTextAsFlow(): Flow<String> = callbackFlow {
     val watcher = addTextChangedListener { editable -> trySend(editable?.toString() ?: "") }
     awaitClose { removeTextChangedListener(watcher) }

app/src/main/java/com/tangem/tap/features/send/ui/stateSubscribers/SendStateSubscriber.kt

@@ -46,8 +46,8 @@ import com.tangem.wallet.R
 /**
 [REDACTED_AUTHOR]
  */
-class SendStateSubscriber(fragment: BaseStoreFragment) :
-    FragmentStateSubscriber<SendState>(fragment) {
+@Suppress("LargeClass")
+class SendStateSubscriber(fragment: BaseStoreFragment) : FragmentStateSubscriber<SendState>(fragment) {
 
     private var dialog: Dialog? = null
 
@@ -79,6 +79,7 @@ class SendStateSubscriber(fragment: BaseStoreFragment) :
             showView(xlmMemoContainer, infoState.xlmMemo)
             showView(xrpDestinationTagContainer, infoState.xrpDestinationTag)
             showView(binanceMemoContainer, infoState.binanceMemo)
+            showView(tonMemoContainer, infoState.tonMemoState)
 
             infoState.xlmMemo?.let {
                 if (!it.viewFieldValue.isFromUserInput) etXlmMemo.setText(it.viewFieldValue.value)
@@ -115,6 +116,16 @@ class SendStateSubscriber(fragment: BaseStoreFragment) :
                     etBinanceMemo.setText(it.viewFieldValue.value)
                 }
             }
+            infoState.tonMemoState?.let {
+                if (infoState.tonMemoState.error != null) {
+                    tilTonMemo.error = fg.getText(R.string.send_extras_error_invalid_memo)
+                } else {
+                    tilBinanceMemo.error = null
+                }
+                if (!it.viewFieldValue.isFromUserInput) {
+                    etTonMemo.setText(it.viewFieldValue.value)
+                }
+            }
         }
 
     private fun handleSendScreen(fg: SendFragment, state: SendState) = with(fg.binding) {

app/src/main/res/layout/layout_send_address_payid.xml

@@ -228,6 +228,37 @@
 
         </FrameLayout>
 
+        <FrameLayout
+            android:id="@+id/tonMemoContainer"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:visibility="gone"
+            tools:visibility="visible">
+
+            <com.google.android.material.textfield.TextInputLayout
+                android:id="@+id/tilTonMemo"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:hint="@string/send_extras_hint_memo"
+                app:boxBackgroundColor="@color/backgroundLightGray"
+                app:errorIconDrawable="@null">
+
+                <com.google.android.material.textfield.TextInputEditText
+                    android:id="@+id/etTonMemo"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:background="@color/backgroundLightGray"
+                    android:ellipsize="end"
+                    android:paddingStart="0dp"
+                    android:paddingEnd="0dp"
+                    android:singleLine="true"
+                    android:textSize="16sp"
+                    tools:text="Ton memo" />
+
+            </com.google.android.material.textfield.TextInputLayout>
+
+        </FrameLayout>
+
     </LinearLayout>
 
-</LinearLayout>
+</LinearLayout>

gradle/dependencies.toml

@@ -68,7 +68,7 @@ kotlinSerialization = "1.4.1"
 # endregion Other libraries
 
 # region Tangem
-tangemBlockchainSdk = "develop-187"
+tangemBlockchainSdk = "develop-189"
 #tangemBlockchainSdk = "0.0.1" # Keep it! - used for local builds
 tangemCardSdk = "develop-206"
 # tangemCardSdk = "0.0.1" # Keep it! - used for local builds