Robinhood Chain: Gas Fee Tracking on Robinhood's L2

2026-09-01

Robinhood Chain is an Ethereum L2 built by Robinhood, the US retail brokerage, on the Arbitrum Orbit stack. It is designed to bring Robinhood's existing user base on-chain, enabling trading of tokenised equities and crypto assets within a regulated framework. The chain launched with native integration into Robinhood's retail app, making it one of the few L2s backed by a major consumer finance company.

Like all Arbitrum Orbit chains, Robinhood Chain generates revenue from gas fees paid by users for every transaction on the network. The revenue calculation is not simply the total fees collected, though: it is what remains after paying for L1 settlement. Every batch of Robinhood Chain transactions needs to be posted to Ethereum mainnet, which costs real money in the form of calldata or blob fees. After subtracting those L1 costs and the 10% Arbitrum Expansion Program fee share (which goes to the Arbitrum DAO and developer fund), what remains is Robinhood's net sequencer revenue.

The adapter queries the Robinhood Chain RPC for L2 gas fees per block, then reads the corresponding L1 batch-submission transactions on Ethereum to compute calldata and blob costs. The AEP deduction is applied to the gross sequencer margin to arrive at net protocol revenue. The blob cost calculation changed after EIP-4844 adoption, which required the adapter to handle both pre- and post-4844 batch formats and apply the correct cost model to each.

All-time fees have reached $46.5 million, with about $611,000 in the past seven days and $55,000 in the most recent day. The context here is interesting: Robinhood Chain serves a retail consumer audience rather than native DeFi users, so its fee volume reflects general transaction activity rather than speculative trading peaks. It is a meaningful signal for how much economic activity is moving through Robinhood's chain as they expand their on-chain product suite.

Website: robinhood.com/chain · Twitter: @RobinhoodCrypto