Updated on 2026-08-14

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

@@ -38,7 +38,7 @@ import timber.log.Timber
 import java.math.BigDecimal
 import java.util.EnumSet
 
-@Suppress("LargeClass")
+@Suppress("LargeClass", "TooManyFunctions")
 // FIXME: Move to its own module and make internal
 @Deprecated("Inject the WalletManagerFacade interface using DI instead")
 class DefaultWalletManagersFacade(
@@ -433,6 +433,20 @@ class DefaultWalletManagersFacade(
         )
     }
 
+    override suspend fun estimateFee(
+        amount: Amount,
+        userWalletId: UserWalletId,
+        network: Network,
+    ): Result<TransactionFee>? {
+        val blockchain = Blockchain.fromId(network.id.value)
+        val walletManager = getOrCreateWalletManager(
+            userWalletId = userWalletId,
+            blockchain = blockchain,
+            derivationPath = network.derivationPath.value,
+        )
+        return (walletManager as? TransactionSender)?.estimateFee(amount = amount)
+    }
+
     override suspend fun validateTransaction(
         amount: Amount,
         fee: Amount?,

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

@@ -25,6 +25,7 @@ import java.util.EnumSet
 /**
  * A facade for managing wallets.
  */
+@Suppress("TooManyFunctions")
 interface WalletManagersFacade {
 
     /**
@@ -166,6 +167,15 @@ interface WalletManagersFacade {
         network: Network,
     ): Result<TransactionFee>?
 
+    /**
+     * Returns estimated fee for transaction
+     *
+     * @param amount of transaction
+     * @param userWalletId selected wallet id
+     * @param network network of currency
+     */
+    suspend fun estimateFee(amount: Amount, userWalletId: UserWalletId, network: Network): Result<TransactionFee>?
+
     /**
      * Validates transaction
      *