Robinhood Chain weighs paid priority transaction ordering

Robinhood Chain, the layer-2 built for tokenized real-world assets, is evaluating Priority Gas Auctions (PGA) — Arbitrum's new paid transaction-ordering system that lets traders pay higher fees to have individual transactions processed ahead of others, per a person familiar with the matter.

• Robinhood Chain currently orders transactions first-come, first-served and never adopted Arbitrum's earlier Timeboost model, which offered a 200-millisecond sequencing head start.
• Arbitrum replaced Timeboost with PGA on September 24; no decision by Robinhood has been confirmed.
• Arbitrum provides the infrastructure behind Robinhood Chain, which launched in July and has since entered the top 10 blockchains by total value locked.

Proponents frame fee-based ordering as a way to curb MEV frontrunning and give professional firms the kind of speed advantage long seen in high-frequency trading. Robinhood declined to comment, and Off-Chain Labs, Arbitrum's developer, did not respond to a request for comment.