📜 ECLYPSE TECHNICAL MEMO

ECLYPSE is a modular privacy execution layer for Ethereum and L2s that enables fully anonymous DeFi transactions. It leverages stealth address derivation (EIP‑5564++), ephemeral off-chain intents, zk-voucher gas abstraction, and disposable relayers to let users interact with DeFi protocols without exposing wallet addresses, transaction intent, or gas funding origins—while remaining fully non-custodial and composable with existing infrastructure.

1. 🔬 Abstract

ECLYPSE is an ephemeral execution layer designed to enable verifiably private, non-interactive, and fully composable DeFi transactions across Ethereum and zk-rollup ecosystems. By combining stealth address derivation (based on an enhanced EIP-5564 framework), ephemeral intent relayers, zero-knowledge gas obfuscation, and deterministic unlinkability circuits, ECLYPSE abstracts identity, origin, and financial intent from the public ledger—without pooled anonymity sets, mixers, or custodial intermediaries.

This protocol enables programmatic privacy at the transaction layer while preserving full DeFi composability and minimizing on-chain surface area.

2. 🧠 Motivation

All on-chain DeFi activity is inherently transparent—this transparency is exploitable:

Adversarial MEV Bots siphon alpha from predictable flows.
Graph analysis maps wallet-to-wallet identity, behavioral clustering, and transaction intent.
Regulatory blacklisting emerges from deterministic wallet reuse and fund traceability.

Existing solutions (e.g., mixers, shields, or pooled anonymity sets) introduce either:

Latency + liquidity fragmentation (Tornado, Aztec Connect)
High overhead + poor UX (Zero-knowledge-only stacks)
Trust assumptions via centralized relayers or bridges

ECLYPSE offers an alternative:

Zero pooled fund exposure
Fully ephemeral off-chain relay execution
zk-mediated funding decoupling
Intent-driven stateless protocol interactions

3. 🎯 Design Goals

Design Parameter	Implementation Mechanism
Unlinkability	One-time stealth identities, ephemeral keypair derivation
Intent Abstraction	EIP-712 signed meta-intents, executed by third-party agents
Gas Privacy	zk‑voucher redemptions using nullifier-set mechanics
DeFi Composability	Stateless proxy contracts w/ pluggable DeFi call data
Reg-Friendliness	Opt-in view keys, post-hoc decryptable trail auditing
No Custody Risk	All funds retained in user-controlled stealth vaults

4. ⚙️ System Components

4.1 🕶️ Stealth Address Framework (EIP-5564++)
• Keypair Splitting: Recipient generates dual keypairs: viewing + spending. Sender combines recipient pubkeys with ephemeral randomness to derive stealth addresses.
• Pedersen hashing + elliptic curve operations ensure stealth address uniqueness and undetectability.
• Entropy Injection: Curve25519 randomness and time-based salts ensure probabilistic uniqueness per derivation, immune to front-running.

4.2 🛰️ Off-chain Intent Relayers
• User Intents: EIP-712–encoded signed payloads (e.g. { op: SWAP, tokenIn: ETH, tokenOut: DAI, amount: X }).
• Relayer Pooling: Stateless, reputation-less relayers fetch intents, execute them on behalf of the user via disposable stealth vaults.
• Execution Obfuscation: Delayed batching, randomized nonce drift, and execution window jitter eliminate timing correlations.
• Relayer Key Disposal: Upon execution, ephemeral keys and contract instances are provably self-destructed.

4.3 ⛽ zk-Gas Obfuscation Layer
• zk-Voucher Pools: Users privately fund gas accounts using zk-commitments. These are converted into non-interactive nullifiers, spent by relayers on-chain without linkable funding origin.
• Redemption Mechanism: Based on zk‑proofs over Merkle inclusion and hash preimages.
• No Funding Correlation: Users and relayers are cryptographically decoupled via one-way nullifier redemptions.

4.4 📦 Stateless DeFi Interfacing
• Modular Proxy Contracts: DeFi calls routed via temporary proxies scoped to a single stealth wallet interaction.
• Pluggable Adapter Interfaces: Uniswap, Sushi, Aave, etc., are invoked using interface-agnostic adapters.
• Auto-expiration: Proxies self-destruct post-interaction to eliminate on-chain residue.

5. 🧬 Cryptographic Stack

Elliptic Curve Cryptography (ECC): Based on Curve25519 + bn128 pairing.
Zero-Knowledge Proof System: Groth16 (migration to Plonkish under evaluation).
Hash Primitives: Poseidon (for zk circuits), Keccak256 (for Solidity-facing compatibility).
Proof Aggregation (Future): Recursive SNARK support for intent bundling.

6. 🔗 Ecosystem Compatibility

Layer	Supported Modules
Wallets	MetaMask, Rabby, WalletConnect, Frame
L2s	Scroll, zkSync, Base, Linea, Optimism
Protocols	Uniswap v2/v3, SushiSwap, 1inch, Aave, Balancer
zk Stack	Semaphore, SnarkJS, circomlib, noir (planned)

7. 🔐 Security & Auditing

Custody Risk: Zero. Funds are never held by relayers or in shared vaults.
Audit Trail: Enforced via off-chain message hashing + on-chain state reconciliation.
Formal Verification (Planned): Z3 + Echidna integration for relayer intent validation.
Audit Partners: Trail of Bits (planned), Nethermind (pending engagement)
Bug Bounty: To be announced post-alpha release (up to $100K critical)

8. 📅 Roadmap

Phase	Description
Alpha	Closed testing with stealth swaps, gas vouchers, and basic relayers
Beta	SDK launch, proxy-based DeFi calls, wallet integrations
Mainnet	Full L2 rollout, post-audit, relayer incentive module
V2.0	Cross-chain privacy, post-quantum key support, relayer auction network

9. 🧠 Conclusion

ECLYPSE redefines how privacy is implemented in programmable finance. It abandons mixer-based paradigms and pooled anonymity for a deterministic, intent-based, and cryptographically unlinkable framework. By modularizing stealth identity, off-chain execution, and zk‑mediated cost abstraction, ECLYPSE empowers developers, DAOs, and institutions to build and transact without surveillance risk—while preserving the trustless nature of Ethereum.