networkFee in createTransaction not working

Developer Discussion
1

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;
}

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.

2

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.