Overview

When interacting with smart contracts on ZetaChain, users need to include a fee for gas for each transaction.

The gas market mechanism for smart contracts on ZetaChain's EVM is similar to that of Ethermint (opens in a new tab) and follows Ethereum's EIP 1559 gas fee structure. This system is designed to deter spamming activities on the network.

Deposit

When depositing tokens to ZetaChain by sending them to the TSS (Threshold Signature Scheme) address on a connected chain, you will pay the fee in the native gas token of that chain, similar to a standard transaction.

For example, if you are depositing ETH from Ethereum to ZetaChain, the fee will be in ETH, comparable to a regular token transfer on the Ethereum network. For more information on Ethereum gas and fees, refer to the official documentation (opens in a new tab).

Withdraw

When withdrawing ZRC-20 tokens back to a connected connected chain, the "withdraw gas fee" is applicable (listed as "Total fee" in the table below).

To find out the fee amount, call the withdrawGasFee function on the ZRC-20 contract (opens in a new tab) for the token you wish to withdraw. This function will return the fee in the native gas token of the connected chain.

The withdraw function will deduct this gas fee from your ZRC-20 balance and proceed with the withdrawal to the destination chain.

Current omnichain fees

In the table below you can see the current fees. The fees are defined in native gas tokens on the destination chain (the chain to which ZRC-20 tokens are withdrawn). The fees are calculated with the gas limit of 500000.

To calculate fees for a different gas limit, please, check out the fees command in the smart-contract template (opens in a new tab):

npx hardhat fees