Updated on 2026-08-14

domain/legacy/src/main/assets/contract_methods.json

@@ -121,5 +121,25 @@
     },
     "0xd0e30db0": {
         "name":"deposit"
+    },
+    "0x9f50973e": {
+        "info":"swapExactETCForTokens",
+        "source":"https://etc.blockscout.com/tx/0xc748777532541e51368089c71c93cb0e410bf93c13908bea2d07ecbbb65aa839",
+        "name":"swap"
+    },
+    "0x3417c606": {
+        "info":"swapETCForExactTokens",
+        "source":"https://etc.blockscout.com/tx/0xb2c5a4418112c0b29654642f9c724bf7b2f9056fc6dd2c22209ed89fe982f0af",
+        "name":"swap"
+    },
+    "0x65f705d3": {
+        "info":"swapExactTokensForETC",
+        "source":"https://etc.blockscout.com/tx/0xdd5d372e8d770e436bd44367bbc64b57d02e7339a1f1b849f7a995a57c65f3dd",
+        "name":"swap"
+    },
+    "0xb4bc722b": {
+        "info":"swapTokensForExactETC",
+        "source":"https://etc.blockscout.com/tx/0xd79e03ca6b71529c94d576ff78c55b4371e2ef3ff8f9a47007995e5b9e77f879",
+        "name":"swap"
     }
 }

domain/legacy/src/main/java/com/tangem/domain/walletmanager/DefaultWalletManagersFacade.kt

@@ -463,11 +463,7 @@ class DefaultWalletManagersFacade(
             derivationPath = network.derivationPath.value,
         )
 
-        val txData = walletManager?.createTransaction(amount, fee, destination)?.copy(
-            extras = null, // todo add memo [[REDACTED_JIRA]]
-        )
-
-        return txData
+        return walletManager?.createTransaction(amount, fee, destination)
     }
 
     override suspend fun sendTransaction(

domain/tokens/src/main/kotlin/com/tangem/domain/tokens/GetCryptoCurrencyActionsUseCase.kt

@@ -97,12 +97,8 @@ class GetCryptoCurrencyActionsUseCase(
         // copy address
         activeList.add(TokenActionsState.ActionState.CopyAddress(true))
 
-        // buy
-        if (rampManager.availableForBuy(cryptoCurrency)) {
-            activeList.add(TokenActionsState.ActionState.Buy(true))
-        } else {
-            disabledList.add(TokenActionsState.ActionState.Buy(false))
-        }
+        // receive
+        activeList.add(TokenActionsState.ActionState.Receive(true))
 
         // send
         if (isSendDisabled(cryptoCurrencyStatus = cryptoCurrencyStatus, coinStatus = coinStatus)) {
@@ -111,9 +107,6 @@ class GetCryptoCurrencyActionsUseCase(
             activeList.add(TokenActionsState.ActionState.Send(true))
         }
 
-        // receive
-        activeList.add(TokenActionsState.ActionState.Receive(true))
-
         // swap
         if (marketCryptoCurrencyRepository.isExchangeable(userWalletId, cryptoCurrency)) {
             activeList.add(TokenActionsState.ActionState.Swap(true))
@@ -121,6 +114,13 @@ class GetCryptoCurrencyActionsUseCase(
             disabledList.add(TokenActionsState.ActionState.Swap(false))
         }
 
+        // buy
+        if (rampManager.availableForBuy(cryptoCurrency)) {
+            activeList.add(TokenActionsState.ActionState.Buy(true))
+        } else {
+            disabledList.add(TokenActionsState.ActionState.Buy(false))
+        }
+
         // sell
         if (rampManager.availableForSell(cryptoCurrency)) {
             activeList.add(TokenActionsState.ActionState.Sell(true))

features/send/impl/src/main/java/com/tangem/features/send/impl/presentation/viewmodel/MemoVerification.kt

@@ -41,7 +41,12 @@ private fun isAssignableValue(value: String): Boolean {
     }
 }
 
-private enum class XlmMemoType { TEXT, ID }
+fun determineXlmMemoType(value: String): XlmMemoType = when {
+    value.isNotEmpty() && value.isDigitsOnly() -> XlmMemoType.ID
+    else -> XlmMemoType.TEXT
+}
+
+enum class XlmMemoType { TEXT, ID }
 
 private const val XRP_TAG_MAX_NUMBER = 4294967295
 private const val XLM_MEMO_MAX_LENGTH = 28

features/send/impl/src/main/java/com/tangem/features/send/impl/presentation/viewmodel/SendViewModel.kt

@@ -6,8 +6,15 @@ import androidx.compose.runtime.setValue
 import androidx.lifecycle.*
 import androidx.paging.PagingData
 import arrow.core.getOrElse
+import com.tangem.blockchain.blockchains.binance.BinanceTransactionExtras
+import com.tangem.blockchain.blockchains.cosmos.CosmosTransactionExtras
+import com.tangem.blockchain.blockchains.stellar.StellarMemo
+import com.tangem.blockchain.blockchains.stellar.StellarTransactionExtras
+import com.tangem.blockchain.blockchains.ton.TonTransactionExtras
 import com.tangem.blockchain.blockchains.xrp.XrpAddressService
+import com.tangem.blockchain.blockchains.xrp.XrpTransactionBuilder
 import com.tangem.blockchain.common.Blockchain
+import com.tangem.blockchain.common.TransactionExtras
 import com.tangem.blockchain.common.address.Address
 import com.tangem.blockchain.common.transaction.Fee
 import com.tangem.blockchain.common.transaction.TransactionFee
@@ -80,7 +87,7 @@ internal class SendViewModel @Inject constructor(
 
     private val selectedAppCurrencyFlow: StateFlow<AppCurrency> = createSelectedAppCurrencyFlow()
 
-    private var inneRrouter: InnerSendRouter by Delegates.notNull()
+    private var innerRouter: InnerSendRouter by Delegates.notNull()
     private var stateRouter: StateRouter by Delegates.notNull()
 
     private val stateFactory = SendStateFactory(
@@ -111,7 +118,7 @@ internal class SendViewModel @Inject constructor(
     }
 
     fun setRouter(router: InnerSendRouter, stateRouter: StateRouter) {
-        inneRrouter = router
+        innerRouter = router
         this.stateRouter = stateRouter
         uiState = uiState.copy(currentState = stateRouter.currentState)
     }
@@ -428,7 +435,7 @@ internal class SendViewModel @Inject constructor(
             destination = recipient.value,
             userWalletId = userWalletId,
             network = cryptoCurrency.network,
-        ) ?: return
+        )?.copy(extras = getMemoExtras(cryptoCurrency.network.id.value, memo?.value)) ?: return
 
         sendTransactionUseCase(
             txData = txData,
@@ -475,7 +482,7 @@ internal class SendViewModel @Inject constructor(
 
     override fun showFee() = stateRouter.showFee(isFromSend = true)
 
-    override fun onExploreClick(txUrl: String) = inneRrouter.openUrl(txUrl)
+    override fun onExploreClick(txUrl: String) = innerRouter.openUrl(txUrl)
 
     private fun getTxUrl(hash: String): String {
         val blockchain = Blockchain.fromId(cryptoCurrency.network.id.value)
@@ -491,6 +498,25 @@ internal class SendViewModel @Inject constructor(
     }
     // endregion
 
+    private fun getMemoExtras(networkId: String, memo: String?): TransactionExtras? {
+        val blockchain = Blockchain.fromId(networkId)
+        if (memo == null) return null
+        return when (blockchain) {
+            Blockchain.Stellar -> {
+                val xmlMemo = when (determineXlmMemoType(memo)) {
+                    XlmMemoType.TEXT -> StellarMemo.Text(memo)
+                    XlmMemoType.ID -> StellarMemo.Id(memo.toBigInteger())
+                }
+                StellarTransactionExtras(xmlMemo)
+            }
+            Blockchain.Binance -> BinanceTransactionExtras(memo)
+            Blockchain.XRP -> memo.toLongOrNull()?.let { XrpTransactionBuilder.XrpTransactionExtras(it) }
+            Blockchain.Cosmos -> CosmosTransactionExtras(memo)
+            Blockchain.TON -> TonTransactionExtras(memo)
+            else -> null
+        }
+    }
+
     companion object {
         private const val XRP_X_ADDRESS = 'X'
         private const val DEFAULT_VALUE = "0.00"

gradle/dependencies.toml

@@ -88,7 +88,7 @@ spr-client = "3.6.2"
 # endregion Other libraries
 
 # region Tangem
-tangemBlockchainSdk = "develop-408"
+tangemBlockchainSdk = "develop-409"
 #tangemBlockchainSdk = "0.0.1" # Keep it! - used for local builds
 tangemCardSdk = "develop-312"
 #tangemCardSdk = "0.0.1" # Keep it! - used for local builds ^