phrasing

src/pages/developers/evm/gas.mdx

@@ -8,28 +8,30 @@ import { Alert } from "~/components/shared";
 
 ## Calling Universal Apps
 
-When calling or depositing tokens to a universal app on ZetaChain through the
-Gateway on a connected chain, you pay the fee in the native gas token of that
-chain, similar to a standard transaction. There are no additional charges or
-fees and execution of universal apps on ZetaChain can be considered gasless,
-when a call is made from a connected chain.
-
-For example, if you are depositing ETH from Ethereum to ZetaChain, the fee will
-be in ETH. For more information on Ethereum gas and fees, refer to the [official
+When interacting with a universal app on ZetaChain from a connected chain
+through the Gateway, fees are paid in the native gas token of the source chain,
+just like in standard transactions. There are no additional charges or fees, and
+execution of universal apps on ZetaChain can be considered gasless, when a call
+is made from a connected chain.
+
+For instance, depositing ETH from Ethereum to ZetaChain incurs a fee in ETH,
+aligning with Ethereum's usual gas fee structure. For detailed information on
+Ethereum gas,, refer to the [official
 documentation](https://ethereum.org/en/developers/docs/gas/).
 
-If a contract on ZetaChain's EVM is called directly (not from a connected
-chain), 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](https://docs.ethermint.zone/basics/gas.html) and follows Ethereum's
-EIP 1559 gas fee structure. This system is designed to deter spamming activities
-on the network.
+Direct calls to contracts on ZetaChain's EVM (not cross-chain calls) require
+users to provide gas fees for each transaction. The ZetaChain EVM employs a gas
+market mechanism inspired by
+[Ethermint](https://docs.ethermint.zone/basics/gas.html) and adheres to
+Ethereum's EIP 1559 fee model, which helps maintain network security and
+prevents spam.
 
 ## Outgoing Calls and Withdrawals
 
-When making a call from a universal app to a contract on a connected chain or
-withdrawing ZRC-20 tokens back to a connected chain, the "withdraw gas fee" is
-applicable.
+Universal apps on ZetaChain can initiate calls to contracts on connected chains
+or facilitate withdrawals of ZRC-20 tokens back to a connected chain. These
+operations require a "withdraw gas fee," which is calculated based on the gas
+limit of the target chain.
 
 Before making a call from a universal app to a contract on a connected chain,
 query the withdraw gas fee for the expected gas limit:
@@ -38,16 +40,11 @@ query the withdraw gas fee for the expected gas limit:
 (address gasZRC20, uint256 gasFee) = IZRC20(zrc20).withdrawGasFeeWithGasLimit(gasLimit);
 ```
 
-- `gasZRC20` is the address of the gas token of the chain to which the
-  call/withdrawal is being made. For example, both for Ethereum USDC and ETH the
-  gas ZRC-20 is ETH.
-- `gasFee` is the amount of tokens that will be charged for the call/withdrawal
-  operation for the specified gas limit.
-
-It's important to query an up-to-date gas amount before executing Gateway
-call/withdraw/withdrawAndCall methods, have the gas fee amount of the gas ZRC-20
-token and approve the Gateway to spend the amount. If the Gateway fails to
-transfer the gas fee amount to itself, the outgoing call/withdrawal will fail.
+- `gasZRC20` is the address of the gas token for the destination chain of the
+  call or withdrawal. For example, both for Ethereum USDC and ETH the gas token
+  is ZRC-20 ETH.
+- `gasFee` is the required amount for the specified gas limit. This ensures you
+  can accurately estimate the necessary fees for successful execution.
 
 Before withdrawing ZRC-20 tokens to a connected chain, query the withdraw gas
 fee:
@@ -56,14 +53,18 @@ fee:
 (address gasZRC20, uint256 gasFee) = IZRC20(zrc20).withdrawGasFee();
 ```
 
-The withdraw call results in a token transfer on a connected chain, so it
-doesn't need a gas limit.
+Withdrawals to connected chains result in token transfers and do not require an
+explicit gas limit.
+
+It’s important to query the current gas fee, approve the Gateway to spend the
+necessary amount, and ensure the gas ZRC-20 token balance is sufficient. If the
+Gateway cannot transfer the required fee to itself, the operation will fail.
 
 ## Current 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.
+The table below displays the current withdraw gas fees, calculated using a
+default gas limit of 500,000. Fees are represented in the native gas token of
+the destination chain.
 
 <Fees type="omnichain" />