Updated on 2026-08-14

data/account/src/main/kotlin/com/tangem/data/account/fetcher/DefaultWalletAccountsFetcher.kt

@@ -87,6 +87,15 @@ internal class DefaultWalletAccountsFetcher @Inject constructor(
         store.updateData { response }
     }
 
+    override suspend fun update(
+        userWalletId: UserWalletId,
+        transform: (GetWalletAccountsResponse?) -> GetWalletAccountsResponse?,
+    ) {
+        val store = getAccountsResponseStore(userWalletId = userWalletId)
+
+        store.updateData { transform(it) }
+    }
+
     override suspend fun push(
         userWalletId: UserWalletId,
         accounts: List<WalletAccountDTO>,

data/common/src/main/kotlin/com/tangem/data/common/account/WalletAccountsSaver.kt

@@ -15,6 +15,11 @@ interface WalletAccountsSaver {
     /** Store wallet accounts [response] by [userWalletId] */
     suspend fun store(userWalletId: UserWalletId, response: GetWalletAccountsResponse)
 
+    suspend fun update(
+        userWalletId: UserWalletId,
+        transform: (GetWalletAccountsResponse?) -> GetWalletAccountsResponse?,
+    )
+
     /** Push wallet accounts [body] by [userWalletId] */
     @Throws
     suspend fun push(userWalletId: UserWalletId, body: SaveWalletAccountsResponse): GetWalletAccountsResponse?

data/wallet-manager/src/main/java/com/tangem/data/walletmanager/DefaultWalletManagersFacade.kt

@@ -22,6 +22,7 @@ import com.tangem.blockchain.transactionhistory.models.TransactionHistoryRequest
 import com.tangem.blockchain.yieldsupply.YieldSupplyContractCallDataProviderFactory
 import com.tangem.blockchainsdk.BlockchainSDKFactory
 import com.tangem.blockchainsdk.models.UpdateWalletManagerResult
+import com.tangem.blockchainsdk.utils.fromNetworkId
 import com.tangem.blockchainsdk.utils.toBlockchain
 import com.tangem.blockchainsdk.utils.toNetworkId
 import com.tangem.crypto.hdWallet.DerivationPath
@@ -623,6 +624,22 @@ internal class DefaultWalletManagersFacade @Inject constructor(
         )
     }
 
+    override suspend fun getNativeTokenBalance(
+        userWalletId: UserWalletId,
+        networkId: String,
+        derivationPath: String?,
+    ): BigDecimal {
+        val blockchain = requireNotNull(Blockchain.fromNetworkId(networkId)) { "blockchain not found" }
+        val walletManager = getOrCreateWalletManager(userWalletId, blockchain, derivationPath)
+
+        return walletManager?.wallet?.amounts
+            ?.firstNotNullOfOrNull { amountEntry ->
+                amountEntry.takeIf { amountEntry.key is AmountType.Coin }
+            }
+            ?.value?.value
+            ?: BigDecimal.ZERO
+    }
+
     override suspend fun getAssetRequirements(
         userWalletId: UserWalletId,
         currency: CryptoCurrency,