DEOS Tessera
Verifiable Shared Sequencer for Ethereum L2s
The only sequencer that proves both what it executed and how it ordered transactions, in a single 200-byte Groth16 proof.
Three guarantees. Three proof tiers.
Two guarantees are ZK-proven on-chain. One is enforced by protocol design. All three proof tiers run on every batch.
[1] Execution correctness [ZK proven, Tier A]
└─ Every syscall-level state transition is valid
Groth16 proof submitted on-chain per batch
[2] Ordering fairness [ZK proven, Tier A]
└─ VDF committed before tx contents decryptable
front-running impossible at the protocol level
[3] Inclusion completeness [Protocol enforced]
└─ Operators slashed for censorship
all txs in window must be included or stake lostTier A: SP1 Groth16
On-chain finality
- Execution correctness: every syscall-level state transition
- Ordering fairness: VDF chain committed before tx contents decryptable
The top-tier proof. Submitted on-chain per batch via commitBatchWithProof(). This is what L1 verifies.
The sequencer landscape
How DEOS Tessera compares to existing sequencer approaches
| Feature | Centralized | Shared BFT | ZK Rollup | DEOS Tessera |
|---|---|---|---|---|
| Execution proof on-chain | ✗ | ✗ | ✅ | ✅ |
| Ordering proof on-chain | ✗ | ✗ | ✗ | ✅ |
| Front-running protected | ✗ | Partial | Partial | ✅ |
| Single proof for both | ✗ | ✗ | ✗ | ✅ |
| Multi-L2 shared infra | ✗ | ✅ | ✗ | ✅ |
| AiDR security layer | ✗ | ✗ | ✗ | ✅ |
Provably Fair Ordering (PFO)
Regulation is coming. When regulators ask your L2 to prove fair ordering, what will you show them?
In traditional finance, front-running is a criminal offense. Market makers must demonstrate best execution. Audit trails are mandatory. Crypto L2 sequencers today have none of this, and regulators have noticed.
United States
SEC + CFTC · 2025-2026
- Project Crypto: SEC + CFTC joint oversight initiative to coordinate digital asset regulation
- CFTC rulemaking: targeting DeFi protocols, market integrity, and AI-driven trading systems
- RFIA amendments: requiring registration, recordkeeping, and supervisory compliance for protocol controllers
- MEV as front-running: increasingly viewed as the crypto equivalent of a criminal offense in traditional markets
European Union
MiCA · Full enforcement July 2026
- MiCA enforcement: all Crypto-Asset Service Providers must comply by July 2026
- Order fairness: mandatory fairness in customer order handling
- Market abuse surveillance: required monitoring and reporting for all trading venues
- Order-data retention: immutable records of how transactions were ordered and processed
Why existing sequencers cannot comply
| Requirement | Traditional Finance | L2 Sequencer Today | Tessera PFO |
|---|---|---|---|
| Prove fair ordering | Audit trail | No mechanism | KWA kernel proof |
| Detect front-running | FINRA surveillance | No visibility | Kernel event log |
| Retain order data | 7+ years (SEC 17a-4) | Often discarded | CAS (permanent) |
| Independent verification | External auditors | Not possible | Permissionless replay |
| Abuse surveillance | Mandatory (MAR) | None | AiDR built-in |
How Tessera provides Provably Fair Ordering
Regulatory Sources
Read the technical whitepaper
Version 1.2 · March 2026. Covers the proof system, VDF protocol, economics, PFO regulatory analysis, integration guide, and roadmap.
L2 Integration
DEOS Tessera integrates with any L2 stack. Connect your rollup to the shared sequencer in days, not months.
- OP StackDrop-in replacement for op-batcher
- Arbitrum OrbitCustom batch poster integration
- Custom rollupsJSON-RPC endpoint, standard tx format
Run a Node
Sequencer operators earn fees proportional to transaction volume across all connected L2 chains. Minimum 1 ETH stake. Slashing enforced on-chain.
- Earn fees from all connected L2s
- Stake in ETH, no new token required
- On-chain slashing for misbehavior
- ZK proofs make cheating impossible