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Encrypted Execution (Sapphire)
Smart contracts run inside TEEs with encrypted state and calldata. Transaction details remain confidential until execution completes — eliminating the information asymmetry that enables MEV.
Solutions / Private DeFi
DeFi Without the Information Leakage.
Full transparency leaks alpha, invites extraction, and limits what you can build. Oasis enables private, coordinated execution with encrypted shared state — unlocking DeFi applications that transparent chains and ZK-only approaches can't support.
Transparency is costing your users money.
DeFi promised permissionless finance. But the same transparency that enables trustless verification also enables systematic extraction. Every transaction broadcasts intent before execution. Every strategy is visible to competitors. Every user is a target.
MEV Extraction
Searchers and validators see pending transactions and extract value through front-running, sandwich attacks, and arbitrage. Your users pay the cost — estimated at billions per year across DeFi.
Alpha Leakage
Proprietary trading strategies, liquidation thresholds, and position sizes are visible on-chain. Sophisticated actors copy strategies, front-run opportunities, and erode competitive advantages.
Limited Protocol Design
Some applications simply can't exist on transparent chains. Sealed-bid auctions, dark pools, private order books, confidential lending positions — these require hiding information.
Privacy-Composability Tradeoff
Most privacy solutions force a choice. ZK systems provide transaction privacy but struggle with complex coordination logic. Private chains offer confidentiality but break composability.
DeFi needs privacy that doesn't sacrifice auditability, composability, or performance. That's what Oasis delivers.
Privacy-preserving DeFi with encrypted shared state.
Oasis enables DeFi protocols to hide what needs hiding while proving what needs proving. Sapphire executes smart contracts with encrypted state and calldata, enabling coordinated multi-party logic that ZK systems can't efficiently support.
How It Works
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Shared Confidential State
Unlike ZK systems that can only prove individual transactions, Sapphire enables multiple users and contracts to interact with the same encrypted data in real-time. This unlocks applications that require a "shared secret" to function.
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Verifiable Integrity
Execution is private, but correctness is provable. The chain continuously verifies that computation happened exactly as intended — privacy with accountability.
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Full EVM Compatibility
Write Solidity. Use Hardhat, Foundry, MetaMask. Deploy contracts that handle encrypted state while remaining composable with the broader EVM ecosystem. Privacy becomes a feature you add, not a platform you migrate to.
DeFi applications that couldn't exist before.
Private Order Books & Dark Pools
Execute trades where order details remain hidden until settlement. Protect trading strategies from front-running and information leakage while maintaining verifiable settlement.
MEV-Resistant DEXs
Eliminate sandwich attacks and front-running by keeping transaction details encrypted until execution. Users get fair prices without paying the MEV tax.
Sealed-Bid Auctions
Run auctions where bid amounts remain confidential until closing. Prevent bid sniping, ensure fair outcomes, and enable price discovery without information leakage.
Private Lending & Borrowing
Lending protocols where collateral ratios, liquidation thresholds, and position sizes remain confidential. Protect users from targeted liquidation attacks.
Confidential Governance
Voting systems where individual votes remain private while results are verifiable. Prevent vote buying, reduce strategic voting, and enable honest preference revelation.
Different tools for different problems.
ZK-proofs are powerful for transaction privacy and single-party computation. But DeFi often requires something different: multiple parties interacting with shared, confidential state in real-time.
ZK Strengths
- Proving individual transaction validity
- Single-user privacy (what you did)
- Succinctness and verification efficiency
ZK Limitations for DeFi
- Struggles with shared confidential state
- Complex proof generation for general logic
- Performance constraints for real-time apps
Why Sapphire
- Native support for encrypted shared state
- Multiple users interacting simultaneously
- Real-time execution, no proof delays
- Full EVM compatibility
ZK excels at proving what happened. Sapphire excels at coordinating what happens — privately, in real-time, between multiple parties.
The confidential EVM for serious protocols.
Eliminate MEV
Transaction details are encrypted until execution completes. Front-running and sandwich attacks become impossible because searchers can't see what they'd be attacking.
Protect Your Alpha
Strategies, positions, and proprietary logic stay confidential. Build differentiated products without broadcasting your approach to competitors.
Unlock New Designs
Build applications that require hidden information: dark pools, sealed auctions, private lending. Move beyond what transparent chains can support.
Keep Your Stack
Solidity, Hardhat, Foundry, MetaMask — your team's existing skills and workflows transfer directly. Privacy is additive, not a migration.
Production Performance
TEEs handle the performance requirements of real DeFi: matching engines, high-frequency updates, complex coordination. No cryptographic bottlenecks.
Ready to build DeFi that protects your users?
Join the protocols building the next generation of private, MEV-resistant financial applications.