Flowra has introduced its Open Orderflow Auction (OOA), a block-building system designed to change how transaction orderflow is allocated across the Solana network.
The framework allows registered searchers to bid competitively for transaction inclusion instead of relying primarily on private or closed orderflow arrangements. Flowra says the approach could make the value of Solana blockspace more transparent while creating a more competitive market for MEV.
The company is positioning the system as an alternative to fragmented orderflow channels, where validators may not always capture the full economic value generated by the transactions included in their blocks.
Early testing has produced promising results. In a trial involving a single validator, Flowra reported a 20.6% increase in compute units processed per block.
The validator moved from 84% of the network average to 101% after adopting the system. Flowra also reported higher block fees than comparable validator software, alongside 100% block production and 99.999% block-engine uptime during the test.
The company is now onboarding institutional-grade validators and searchers to the OOA as it prepares for a broader rollout across the Solana ecosystem.
Programmable policies give validators more control
Flowra's offering extends beyond the auction itself. The company is also introducing Programmable Block Policy, which allows validators to establish transaction-selection rules directly within the block-building layer.
The feature is intended to give operators greater control over which transactions are included in their blocks without requiring modifications to the underlying Solana protocol.
This could be particularly relevant for institutional validators that need to incorporate specific operational, compliance or regulatory requirements into their infrastructure.
Flowra has also announced a collaboration with compliance infrastructure provider Honeypot to bring sanctions and risk-screening capabilities into this layer.
The broader architecture draws inspiration from developments in Ethereum's MEV market, where competitive block building and bidding have created new mechanisms for determining the value of transaction orderflow and increasing proposer revenue.
Flowra argues that Solana's high throughput and low-latency architecture provide suitable conditions for applying a similar market-driven approach to block construction.
“Solana's performance has made it one of the industry's leading blockchain networks, but its MEV market remains largely concentrated,” said Harry Hwang, CEO of Flowra. “By opening block building to transparent competition, we're creating a more efficient market for blockspace while giving validators greater control over how their blocks are constructed with full verifiability and auditability.”
With the Open Orderflow Auction now available to participating Solana validators and searchers, Flowra is seeking to establish a more competitive market around one of the network's key economic layers: the construction and allocation of blockspace.
U.Today Editorial Team
Dan Burgin
