# networkFee in createTransaction not working

**URL:** <https://community.fireblocks.com/t/networkfee-in-createtransaction-not-working/1071>\
**Category:** Developer Discussion\
**Created:** [May 29, 2024, 9:45am UTC](https://community.fireblocks.com/t/networkfee-in-createtransaction-not-working/1071 "2024-05-29T09:45:05Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![kaamil](https://avatars.discourse-cdn.com/v4/letter/k/2bfe46/32.png) [@kaamil](https://community.fireblocks.com/u/kaamil)\
**Post date:** [May 29, 2024, 9:45am UTC](https://community.fireblocks.com/t/networkfee-in-createtransaction-not-working/1071/1 "2024-05-29T09:45:05Z")

</div>

There is no networkFee option specified in TransactionArguments for the createTransaction even though it is stated in documentation.

export interface TransactionArguments {  
assetId?: string;  
source?: TransferPeerPath;  
destination?: DestinationTransferPeerPath;  
amount?: number | string;  
operation?: TransactionOperation;  
fee?: number | string;  
feeLevel?: FeeLevel;  
failOnLowFee?: boolean;  
maxFee?: string;  
priorityFee?: number | string;  
gasPrice?: number | string;  
gasLimit?: number | string;  
note?: string;  
cpuStaking?: number;  
networkStaking?: number;  
autoStaking?: boolean;  
customerRefId?: string;  
extraParameters?: object;  
destinations?: TransactionDestination;  
replaceTxByHash?: string;  
externalTxId?: string;  
treatAsGrossAmount?: boolean;  
forceSweep?: boolean;  
feePayerInfo?: TransactionArgumentsFeePayerInfo;  
travelRuleMessage?: TravelRule;  
}

> **[Create a new transaction](https://developers.fireblocks.com/reference/post_transactions)**
>
> Creates a new transaction. This endpoint can be used for regular Transfers, Contract Calls, Raw & Typed message signing. For Transfers, the required parameters are: assetId,

networkFee

For EVM-based blockchains only. The total transaction fee in the blockchain’s largest unit. Note: Only two of the three arguments can be specified in a single transaction: `gasLimit`, `gasPrice` and `networkFee`. Fireblocks recommends using a numeric string for accurate precision. Although a number input exists, it is deprecated. - The transaction blockchain fee.

- For Ethereum, you can’t pass gasPrice, gasLimit and networkFee all together.
- A numeric value representation is required.

Providing it doesn’t change anything.

---

<div class="post-metadata">

**Author:** ![mnamakwala](https://avatars.discourse-cdn.com/v4/letter/m/b5a626/32.png) [@mnamakwala](https://community.fireblocks.com/u/mnamakwala)\
**Post date:** [May 29, 2024, 7:15pm UTC](https://community.fireblocks.com/t/networkfee-in-createtransaction-not-working/1071/2 "2024-05-29T19:15:52Z")

</div>

Hi Kaamil,  
The network fee is used to calculate the max fee for ETH transactions. If the network fee is used to calculate the max fee, you will see the passed-in network fee value in the “fee” field.

maxFee = networkFee/gasLimit

The network fee field is used in fee calculations but does not exist in the transaction object; use the “fee” field instead. I hope this clears things up for you.

If (block base fee + PriorityFee) \< maxFee, then (block base fee + PriorityFee) = gas price.  
However, if the (block base fee + PriorityFee) \> maxFee, then max fee = gas price.

Please refer to the article below.

[https://support.fireblocks.io/hc/en-us/articles/10615171241500-EVM-fees-Adjusting-network-transaction-fees#:~:text=If%20(block%20base%20fee%20%2B%20PriorityFee)%20\<%20maxFee%2C%20then%20(block%20base%20fee%20%2B%20PriorityFee)%20%3D%20gas%20price. However%2C%20if%20the%20(block%20base%20fee%20%2B%20PriorityFee)%20\>%20maxFee%2C%20then%20max%20fee%20%3D%20gas%20price](https://support.fireblocks.io/hc/en-us/articles/10615171241500-EVM-fees-Adjusting-network-transaction-fees#:~:text=If%20(block%20base%20fee%20%2B%20PriorityFee)%20%3C%20maxFee%2C%20then%20(block%20base%20fee%20%2B%20PriorityFee)%20%3D%20gas%20price.%0AHowever%2C%20if%20the%20(block%20base%20fee%20%2B%20PriorityFee)%20%3E%20maxFee%2C%20then%20max%20fee%20%3D%20gas%20price).