Updated on 2026-08-14

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

@@ -280,4 +280,27 @@ internal class DefaultTransactionRepository(
             else -> null
         }
     }
+
+    override suspend fun prepareForSend(
+        transactionData: TransactionData,
+        signer: TransactionSigner,
+        userWalletId: UserWalletId,
+        network: Network,
+    ): Result<ByteArray> = withContext(coroutineDispatcherProvider.io) {
+        val blockchain = Blockchain.fromId(network.id.value)
+        val walletManager = walletManagersFacade.getOrCreateWalletManager(
+            userWalletId = userWalletId,
+            blockchain = blockchain,
+            derivationPath = network.derivationPath.value,
+        )
+        val preparer = walletManager as? TransactionPreparer ?: kotlin.run {
+            Timber.e("${walletManager?.wallet?.blockchain} does not support TransactionBuilder")
+            error("Wallet manager does not support TransactionPreparer")
+        }
+
+        when (val prepareForSend = preparer.prepareForSend(transactionData, signer)) {
+            is com.tangem.blockchain.extensions.Result.Failure -> Result.failure(prepareForSend.error)
+            is com.tangem.blockchain.extensions.Result.Success -> Result.success(prepareForSend.data)
+        }
+    }
 }