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Open Orderflow Auction · Solana

Open
Orderflow
Auction

MEV and priority fees flow through channels that are hard to see and harder to access. Flowra brings them into the open with a transparent, compliance-grade auction built for validators, institutions, and users on equal footing.

A More Open Solana MEV Market

Today's Solana infrastructure tends to concentrate ordering power among a small number of providers. MEV flows through private channels, fee levels are hard to read, and validators have limited flexibility in how they participate.

01

Limited Fee Visibility

Without a clear view of block congestion or competing fee levels, users tend to set fees defensively high. A more transparent market could help bring those costs closer to what's actually needed.

02

Concentrated Infrastructure

A single provider currently handles the majority of Solana validator infrastructure. This makes it difficult for validators to explore alternatives or optimize independently.

03

Private Transaction Ordering

MEV opportunities are often handled through private arrangements that are difficult to observe from the outside. More openness here would benefit the ecosystem as a whole.

04

Uneven Access to Opportunities

Solana's Gulf Stream architecture routes transactions privately to leaders by design. Most validators and searchers have limited visibility into MEV opportunities as a result.

An Open Orderflow Auction for Everyone

Flowra builds an Open Orderflow Auction (OOA) directly on Solana. Multiple validators share pending transactions to form an accessible stream. Searchers participate through a standard API, and the resulting competition creates better outcomes for validators, users, and the ecosystem.

Fee Transparency

Users can observe real-time fee levels across the network, making it easier to set fees at a level that's actually appropriate for current conditions.

Open MEV Market

MEV opportunities are auctioned openly rather than captured through private channels, keeping the value within the ecosystem and its participants.

Validator Flexibility

Validators can choose their own terms and select from multiple auction participants, giving them more options and greater control over how they engage with the ecosystem.

Open Participation

The orderflow stream is standardized and accessible through an open API, welcoming a wider range of searchers to participate and contribute to a healthier market.

Compliance by Design

Built with institutions in mind. Sanctions screening, AML support, and policy controls are part of the infrastructure itself, not an afterthought.

Compliance,
Built Into the Block

Programmable Block Policy (PBP) lets validators enforce the policies financial institutions require, such as sanctions screening, AML requirements, and custom bundle restrictions, directly at the infrastructure layer.

These policies belong to the validator, not to Flowra. Each validator retains full control over how their blocks are built, giving institutions the confidence to participate on their own terms.

Sanctions & AML Screening

Validators can enforce compliance policies required by financial institutions. Screening capabilities are part of the infrastructure, ready from day one.

Harmful MEV Mitigation

PBP is designed to prevent single-bundle sandwich attacks by default, with protections continuously expanding to cover more sophisticated forms of predatory MEV.

Validator-Owned Policies

From compliance requirements to bundle restrictions and operational preferences, every policy belongs to the validator. No single provider decides how blocks should be built.

Shape It, Don't Hide It

MEV is a natural byproduct of blockchain design, and attempts to eliminate it entirely often just drive it into less transparent channels. Beneficial forms like atomic arbitrage, liquidations, and healthy back-running improve market efficiency and contribute to price discovery. Flowra's approach preserves those mechanisms while systematically reducing extractive behavior that comes at the expense of users. Transparency, compliance, and healthy market dynamics should reinforce one another instead of competing.

From Transaction to Block

Flowra connects pending transactions to an open stream of competing searchers, and routes the best bundles into the block, all within Solana's natural block cadence.

01

Validator
Client

Validators run the Flowra client, which observes and forwards pending transactions via a Banking Stage hook.

02

Open
Stream

Transactions are deduplicated and broadcast to all searchers in a standardized gRPC stream, with no private access required.

03

Open
Auction

Searchers detect MEV opportunities and submit tip-bearing bundles. Mini-auctions run in 200ms cycles matching Solana's block time.

04

Bundle
Selection

The highest-tip bundles are selected with conflict-aware logic. Atomic execution ensures all transactions in a bundle succeed or none do.

05

Block
Assembly

Winning bundles are included first in the block. Validators maximize revenue. Users benefit from fair, transparent ordering.

Better Returns for Stakers.
A Healthier Ecosystem.

When orderflow moves through an open auction, the benefits don't stay with infrastructure providers. They flow through to the people who actually secure and use the network.

Staking APR Goes Up

When more searchers compete openly for the same orderflow, the tips they pay to validators naturally increase. Those tips feed directly into validator revenue, which is what determines staking yields for everyone who has SOL staked.

Flowra's open auction is designed to attract a broader pool of searchers, intensifying competition and passing the upside along to validators and their delegators.

Current tips APY
~0.4%
Tips represent a small share of total staking yield today, largely because orderflow competition is limited.
Historical peak
~3.5%
At peak market activity, tips APY reached 3.5%, showing the potential when competition is more active.
Flowra's goal
Open market
More searchers, more competition, better tip outcomes, and a meaningful improvement in total staking returns.
01

Validators earn more

Open auction competition drives tip revenue higher, benefiting validators and everyone who delegates to them.

02

Stakers see better yields

Higher validator tip income flows through to staking APR, improving returns for passive SOL holders over time.

03

Users benefit from transparency

Open fee visibility and fair transaction ordering mean users stop overpaying and gain protection from predatory MEV.

04

The ecosystem grows

More transparent infrastructure attracts more participants, more searchers, and a more resilient Solana DeFi ecosystem.

Built for the Entire Solana Ecosystem

For Validators

More Options.
More Control.

  • Access multiple infrastructure providers and choose what works best
  • Open searcher competition naturally improves tip outcomes
  • Retain bundle selection rights within your own block
  • Set your own policies for auction participation
For Users

Clearer Fees.
Fairer Outcomes.

  • See real-time fee levels before submitting transactions
  • Fair, open competition keeps transaction costs efficient
  • No-Sandwich builder options available for added protection
  • Transparent, verifiable transaction ordering
For Searchers

Open Stream.
Level Playing Field.

  • Access the orderflow stream with a standard API key
  • Standardized gRPC feed that's easy to build on
  • Compete on the quality of your strategy, not your connections
  • Atomic bundle execution with conflict-aware selection
For Institutions

Compliance-Grade.
Ready to Operate.

  • Sanctions screening and AML support built into block policies
  • Operate Solana validators within your regulatory requirements
  • Auditable, transparent transaction ordering by design
  • Policy controls owned by you, not the infrastructure provider

Working Alongside the Ecosystem

Flowra collaborates with validators, infrastructure providers, and teams across Solana to build a more open orderflow market.

Backed by Builders Who Get It

Flowra represents an important step forward for Solana. Decentralization is not just about validator count but about whether validators have real infrastructure choice.

By reopening transaction flow through its Open Orderflow Auction and enabling Programmable Block Policies, Flowra reduces dependence on closed systems and introduces more transparent competition for blockspace, making the ecosystem stronger, more open and more resilient.

Jaemin Cofounder of Magic Labs

At its core, Flowra is competing for one of Solana's most valuable assets — order flow itself with the goal of making transaction ordering more transparent, competitive and economically aligned across the ecosystem.

Terry Binance

Flowra is building the validator-aligned MEV layer Solana needs, turning orderflow competition into higher validator revenue and a more efficient blockspace market.

Johnny Sei Labs & ex-Circle

MEV has become a major source of validator revenue but it has also concentrated parts of Solana's transaction supply chain among a few infrastructure providers. As the ecosystem matures, healthy competition is critical to preserving validator choice and driving innovation.

Flowra is helping push this forward by building open infrastructure that expands validator optionality and strengthens the transaction marketplace.

Will FACTBLOCK

A Better Orderflow
Auction for
Solana.

Flowra is working toward a more transparent and accessible MEV ecosystem that works a little better for everyone involved.

Get in touch →