L2 Fee

Scroll Alpha Testnet is now deprecated.

Please visit our new documentation for the Scroll Sepolia Testnet at https://docs.scroll.io/

Transactions on Scroll, like on Ethereum, must pay the cost of executing their computations and storing the data they produce.

How is the execution fee calculated?

In short, it is calculated very simply:

l2TransactionExecutionFee = l2TransactionGasUsed * l2TransactionGasPrice 

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 determined by the estimateGas endpoint on our Nodes.

In other words, the execution fee is calculated precisely like pre-EIP1559 Ethereum.

Where are the tx fees sent to?

Currently, all L2 tx fees are collected into our L2 FeeVault predeploy at address 0x5300000000000000000000000000000000000005. This contract also tracks the amount we’ve historically withdrawn to L1.

Check amount withdrawn to L1 (in ETH):

cast call --rpc-url "https://alpha-rpc.scroll.io/l2" "0x5300000000000000000000000000000000000005" "totalProcessed()(uint256)" | cast --from-wei

Check fees that have been collected on L2 but haven’t been bridged back to L1 (in ETH):

cast balance --rpc-url "https://alpha-rpc.scroll.io/l2" "0x5300000000000000000000000000000000000005" | cast --from-wei