Updated on 2026-08-14

app/src/main/java/com/tangem/tap/di/domain/CardDomainModule.kt

@@ -69,4 +69,12 @@ internal object CardDomainModule {
     fun provideIsNeedToBackupUseCase(walletStateHolder: WalletsStateHolder): IsNeedToBackupUseCase {
         return IsNeedToBackupUseCase(walletStateHolder)
     }
+
+    @Provides
+    @ViewModelScoped
+    fun provideGetExtendedPublicKeyForCurrencyUseCase(
+        derivationsRepository: DerivationsRepository,
+    ): GetExtendedPublicKeyForCurrencyUseCase {
+        return GetExtendedPublicKeyForCurrencyUseCase(derivationsRepository)
+    }
 }

app/src/main/java/com/tangem/tap/domain/TangemSdkManager.kt

@@ -26,6 +26,8 @@ import com.tangem.operations.derivation.DerivationTaskResponse
 import com.tangem.operations.derivation.DeriveMultipleWalletPublicKeysTask
 import com.tangem.operations.pins.SetUserCodeCommand
 import com.tangem.operations.usersetttings.SetUserCodeRecoveryAllowedTask
+import com.tangem.crypto.hdWallet.bip32.ExtendedPublicKey
+import com.tangem.operations.derivation.DeriveWalletPublicKeyTask
 import com.tangem.tap.derivationsFinder
 import com.tangem.tap.domain.tasks.product.CreateProductWalletTask
 import com.tangem.tap.domain.tasks.product.CreateProductWalletTaskResponse
@@ -138,6 +140,17 @@ class TangemSdkManager(
         return runTaskAsyncReturnOnMain(DeriveMultipleWalletPublicKeysTask(derivations), cardId)
     }
 
+    suspend fun deriveExtendedPublicKey(
+        cardId: String?,
+        walletPublicKey: ByteArray,
+        derivation: DerivationPath,
+    ): CompletionResult<ExtendedPublicKey> = withContext(Dispatchers.Main) {
+        runTaskAsyncReturnOnMain(
+            DeriveWalletPublicKeyTask(walletPublicKey, derivation),
+            cardId,
+        )
+    }
+
     suspend fun resetToFactorySettings(
         cardId: String,
         allowsRequestAccessCodeFromRepository: Boolean,

app/src/main/java/com/tangem/tap/domain/card/DefaultDerivationsRepository.kt

@@ -1,12 +1,15 @@
 package com.tangem.tap.domain.card
 
+import com.tangem.common.CompletionResult
 import com.tangem.common.doOnFailure
 import com.tangem.common.doOnSuccess
 import com.tangem.common.extensions.ByteArrayKey
 import com.tangem.crypto.hdWallet.DerivationPath
+import com.tangem.crypto.hdWallet.bip32.ExtendedPublicKey
 import com.tangem.datasource.local.userwallet.UserWalletsStore
 import com.tangem.domain.card.repository.DerivationsRepository
 import com.tangem.domain.tokens.model.CryptoCurrency
+import com.tangem.domain.userwallets.UserWalletIdBuilder
 import com.tangem.domain.wallets.models.UserWallet
 import com.tangem.domain.wallets.models.UserWalletId
 import com.tangem.operations.derivation.ExtendedPublicKeysMap
@@ -51,6 +54,28 @@ internal class DefaultDerivationsRepository(
         error("This code should never be reached")
     }
 
+    override suspend fun deriveExtendedPublicKey(
+        userWalletId: UserWalletId,
+        derivation: DerivationPath,
+    ): ExtendedPublicKey? {
+        val userWallet = userWalletsStore.getSyncOrNull(userWalletId) ?: error("User wallet not found")
+        val walletCard = userWallet.scanResponse.card.wallets.firstOrNull {
+            UserWalletIdBuilder.scanResponse(userWallet.scanResponse).build()?.value
+                .contentEquals(userWallet.walletId.value)
+        } ?: return null
+
+        val result = tangemSdkManager.deriveExtendedPublicKey(
+            cardId = null,
+            walletPublicKey = walletCard.publicKey,
+            derivation = derivation,
+        )
+
+        return when (result) {
+            is CompletionResult.Failure -> throw result.error
+            is CompletionResult.Success -> result.data
+        }
+    }
+
     private suspend fun updatePublicKeys(userWalletId: UserWalletId, keys: DerivedKeys): Result<Unit> {
         return runCatching(dispatchers.io) {
             userWalletsStore.update(