fix: use only base asset amount when calculating fee (#1240)

Resolves the issue #1239

packages/fuels-accounts/src/account.rs

@@ -213,7 +213,10 @@ pub trait Account: ViewOnlyAccount {
             ScriptTransactionBuilder::prepare_transfer(inputs, outputs, tx_policies);
 
         self.add_witnessses(&mut tx_builder);
-        self.adjust_for_fee(&mut tx_builder, amount).await?;
+
+        let used_base_amount = if asset_id == AssetId::BASE { amount } else { 0 };
+        self.adjust_for_fee(&mut tx_builder, used_base_amount)
+            .await?;
 
         let tx = tx_builder.build(provider).await?;
         let tx_id = provider.send_transaction_and_await_commit(tx).await?;