Arbitrum vs dYdX

Arbitrum One and Nova are optimistic rollups using Nitro fraud proofs that compress transactions into calldata submitted to Ethereum. The Orbit toolkit lets projects deploy their own Arbitrum Orbit chains with configurable permissions. ARB token governance manages the 3 000‑plus validator whitelist and a 1 billion‑dollar ecosystem grant fund.

The dYdX Chain is an app‑specific Cosmos chain that replaced the prior StarkEx L2, giving validators control over an on‑chain order book for perpetual futures. Traders retain familiar features like cross‑margin and isolated positions, and DYDX token holders secure the chain while receiving 100 % of protocol fees. Lambda architecture shards order processing across ABCI++ extensions for sub‑second latency.