⬜️ #1 - Gas in Arbitrum ⬜️ L1 Gas: Paid to cover the future batches on L1. It is the majority of the commission and depends on the calldata size of the transaction and the calldata value in L1. At the time of the transaction, you can only estimate its approximate ratio to the size of the future batches. In other words, the L1 component is meant to compensate the Sequencer for the cost of posting transactions on L1 . ⬜️ L2 Gas: Works similarly to commissions in Ethereum Mainnet — it is a transaction execution fee on L2. The L2 component covers the cost of operating the L2 chain; it uses Geth for gas calculation and thus behaves nearly identically to L1 Ethereum. One difference is that unlike on Ethereum, Arbitrum chains enforce a gas price floor, currently 0.1 gwei on Arbitrum One and 0.01 gwei on Nova (See Gas). L2 Gas price adjusts responsively to chain congestion, ala EIP 1559.