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update curie fee information #318

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update curie fee information #318

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9 changes: 6 additions & 3 deletions src/content/docs/en/developers/transaction-fees-on-scroll.mdx
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Expand Up @@ -20,6 +20,7 @@ Compared to Ethereum mainnet, Scroll introduces some new dimensions to transacti

- **L2 fee**
- Calculated in the same manner as on the L1, equaling `gas_price * gas_used`
- `gas_price` is based on the `baseFeePerGas` of the block after the Curie upgrade, and `maxPriorityFeePerGas` supplied from the user.
- **L1 fee**
- This additional fee covers sending data to L1 for data availability. Transactions initiated on the L1 do not pay this fee.
- It is calculated based on the size of the transaction's calldata
Expand All @@ -42,15 +43,17 @@ Transactions on Scroll, like on Ethereum, must pay the cost of executing their c

### Calculating the Execution Fee

After the Curie Upgrade, Scroll transactions can take advantage of EIP-1559 like fees using `maxFeePerGas` and `maxPriorityFeePerGas`.

The L2 execution fee is straightforward:

```javascript
l2TransactionExecutionFee = l2TransactionGasUsed * l2TransactionGasPrice
l2TransactionExecutionFee = l2TransactionGasUsed * (baseFeePerGas + maxPriorityFeePerGas)
```

The total fee depends on what the transaction does (`l2TransactionGasUsed`) as well as the current market conditions (`l2TransactionGasPrice`). Users set the gas price, and the "gas used" is assessed by calling the `estimateGas` endpoint on a Scroll node.
The total fee depends on what the transaction does (`l2TransactionGasUsed`) as well as the current market conditions (`baseFeePerGas + maxPriorityFeePerGas`).

In other words, the execution fee is calculated precisely like pre-[EIP1559](https://eips.ethereum.org/EIPS/eip-1559) Ethereum.
Users wishing to use Legacy transactions should set `gasPrice` to a combination of the `baseFee` and the estimated `maxPriorityFeePerGas`. Using `eth_gasPrice` will return an estimate for `maxPriorityFeePerGas` which itself could be too low to execute transactions.

## L1 Fee

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