Updated on 2026-08-14

data/transaction/src/main/java/com/tangem/data/transaction/DefaultWalletAddressServiceRepository.kt

@@ -1,12 +1,14 @@
 package com.tangem.data.transaction
 
 import android.net.Uri
-import androidx.core.text.isDigitsOnly
 import com.tangem.blockchain.blockchains.near.NearWalletManager
 import com.tangem.blockchain.common.Blockchain
 import com.tangem.blockchain.common.NameResolver
 import com.tangem.blockchain.common.ResolveAddressResult
 import com.tangem.blockchain.common.ReverseResolveAddressResult
+import com.tangem.blockchain.common.TransactionValidator
+import com.tangem.blockchain.common.memo.MemoState
+import com.tangem.blockchain.extensions.Result
 import com.tangem.blockchainsdk.utils.toBlockchain
 import com.tangem.domain.models.network.Network
 import com.tangem.domain.models.wallet.UserWalletId
@@ -16,7 +18,6 @@ import com.tangem.domain.wallets.models.ParsedQrCode
 import com.tangem.domain.wallets.models.errors.ParsedQrCodeErrors
 import com.tangem.utils.coroutines.CoroutineDispatcherProvider
 import kotlinx.coroutines.withContext
-import java.math.BigInteger
 
 class DefaultWalletAddressServiceRepository(
     private val walletManagersFacade: WalletManagersFacade,
@@ -95,19 +96,28 @@ class DefaultWalletAddressServiceRepository(
             }
         }
 
-    override fun validateMemo(network: Network, memo: String): Boolean {
+    override suspend fun validateMemo(userWalletId: UserWalletId, network: Network, memo: String): Boolean =
-        if (memo.isEmpty()) return true
+        withContext(dispatchers.io) {
-        return when (network.rawId) {
+            val walletManager = walletManagersFacade.getOrCreateWalletManager(
-            Blockchain.XRP.id -> {
+                userWalletId = userWalletId,
-                val tag = memo.toLongOrNull()
+                network = network,
-                tag != null && tag <= XRP_TAG_MAX_NUMBER
+            ) ?: return@withContext true
+
+            val memoStateResult = (walletManager as? TransactionValidator)?.validateMemo(memo)
+            if (memoStateResult != null) {
+                when (memoStateResult) {
+                    is Result.Success -> when (memoStateResult.data) {
+                        MemoState.NotSupported,
+                        MemoState.Valid,
+                        -> true
+                        MemoState.Invalid -> false
+                    }
+                    is Result.Failure -> true
+                }
+            } else {
+                true
             }
-            Blockchain.Stellar.id -> {
-                isAssignableXlmValue(memo)
-            }
-            else -> true
         }
-    }
 
     override suspend fun parseSharedAddress(input: String, network: Network): ParsedQrCode {
         val blockchain = network.toBlockchain()
@@ -145,26 +155,4 @@ class DefaultWalletAddressServiceRepository(
     private fun Blockchain.isNear(): Boolean {
         return this == Blockchain.Near || this == Blockchain.NearTestnet
     }
-
-    private fun isAssignableXlmValue(value: String): Boolean {
-        return when {
-            value.isNotEmpty() && value.isDigitsOnly() -> {
-                try {
-                    // from com.tangem.blockchain.blockchains.stellar.StellarMemo.toStellarSdkMemo
-                    value.toBigInteger() in BigInteger.ZERO..Long.MAX_VALUE.toBigInteger() * 2.toBigInteger()
-                } catch (ex: NumberFormatException) {
-                    false
-                }
-            }
-            else -> {
-                // from org.stellar.sdk.MemoText
-                value.toByteArray().size <= XLM_MEMO_MAX_LENGTH
-            }
-        }
-    }
-
-    companion object {
-        private const val XLM_MEMO_MAX_LENGTH = 28
-        private const val XRP_TAG_MAX_NUMBER = 4294967295
-    }
 }

domain/transaction/src/main/java/com/tangem/domain/transaction/WalletAddressServiceRepository.kt

@@ -23,7 +23,7 @@ interface WalletAddressServiceRepository {
 
     suspend fun validateAddress(userWalletId: UserWalletId, network: Network, address: String): Boolean
 
-    fun validateMemo(network: Network, memo: String): Boolean
+    suspend fun validateMemo(userWalletId: UserWalletId, network: Network, memo: String): Boolean
 
     suspend fun parseSharedAddress(input: String, network: Network): ParsedQrCode
 }

domain/transaction/src/main/java/com/tangem/domain/transaction/usecase/ValidateWalletMemoUseCase.kt

@@ -3,7 +3,8 @@ package com.tangem.domain.transaction.usecase
 import arrow.core.Either
 import arrow.core.left
 import arrow.core.right
-import com.tangem.domain.models.network.Network
+import com.tangem.domain.models.currency.CryptoCurrency
+import com.tangem.domain.models.wallet.UserWalletId
 import com.tangem.domain.transaction.WalletAddressServiceRepository
 import com.tangem.domain.transaction.error.ValidateMemoError
 
@@ -14,9 +15,17 @@ class ValidateWalletMemoUseCase(
     private val walletAddressServiceRepository: WalletAddressServiceRepository,
 ) {
 
-    operator fun invoke(network: Network, memo: String): Either<ValidateMemoError, Unit> {
+    suspend operator fun invoke(
+        userWalletId: UserWalletId,
+        cryptoCurrency: CryptoCurrency,
+        memo: String,
+    ): Either<ValidateMemoError, Unit> {
         return try {
-            val isValidMemo = walletAddressServiceRepository.validateMemo(network, memo)
+            val isValidMemo = walletAddressServiceRepository.validateMemo(
+                userWalletId = userWalletId,
+                network = cryptoCurrency.network,
+                memo = memo,
+            )
             if (isValidMemo) {
                 Unit.right()
             } else {

features/send-v2/impl/src/main/java/com/tangem/features/send/v2/subcomponents/destination/model/SendDestinationModel.kt

@@ -323,8 +323,9 @@ internal class SendDestinationModel @Inject constructor(
                 senderAddresses = senderAddresses.value,
             )
             val memoValidationResult = validateWalletMemoUseCase(
+                userWalletId = userWalletId,
+                cryptoCurrency = cryptoCurrency,
                 memo = memo.orEmpty(),
-                network = cryptoCurrency.network,
             )
 
             if (type != null) {

gradle/tangem_dependencies.toml

@@ -5,7 +5,7 @@
 # https://github.com/tangem/tangem-sdk-android/
 # https://github.com/tangem/vico
 
-tangemBlockchainSdk = "releases-5.34-1428"
+tangemBlockchainSdk = "releases-5.34-1430"
 #tangemBlockchainSdk = "0.0.1" # Keep it! - used for local builds
 tangemCardSdk = "releases-5.34-579"
 #tangemCardSdk = "0.0.1" # Keep it! - used for local builds ^