Private Swap

"As a trader, I can swap 1000 ETH → USDC without any bot seeing my order or front-running my price."

Overview

Private Swap is Gelap's private AMM that ensures your trading intent remains invisible until execution.

What It Solves

• MEV Bots: On public DEXs, bots see your order in the mempool and "sandwich" it, giving you a worse price.

• Copy Trading: Competitors track profitable wallets to copy their moves.

• Market Impact: Large orders panic the market before they even settle.

Public DEX vs. Gelap

How does this stack up against the status quo?

Feature	🦄 Standard Public DEX	🌑 Gelap Private Swap
Transaction Data	🔴 Fully Visible	🟢 Cryptographically Hidden
MEV Protection	❌ Vulnerable (Sandwich Attacks)	✅ 100% Protected (Zero-MEV)
Trader Identity	❌ Public Wallet Address	✅ Identity Shielded
Strategy Secrecy	❌ Leaked immediately	✅ Hidden from Competitors
Fees	⛽ High/Variable	⚡ Low (~$0.01 - $0.05)

---

How It Works

Step-by-Step Flow

1. User has shielded tokens (already deposited into Gelap)

2. Select token pair (e.g., USDC → ETH)

3. Enter swap amount (only visible to user's wallet)

4. ZK proof generated locally — proves the swap is valid without revealing details

5. Proof submitted on-chain — contract verifies proof, executes swap

6. User receives new shielded tokens — output tokens remain private

---

Activity Diagram

---

Sequence Flow

---

What's Private vs Public

Data Point	Status
Swap amount	🔒 Private
Token types	🔒 Private
User address	🔒 Private
Swap rate used	🔒 Private
Swap occurred	🌐 Public (event emitted)
Pool total liquidity	🌐 Public

---

Key Components

Private AMM Pool

Atomic Swap Logic (Inside ZK Proof)

PROVE:
  1. I own input notes worth X of Token A        ✅ Without revealing X
  2. Output amount Y of Token B is correct       ✅ Without revealing Y
     per AMM formula (x * y = k)
  3. Nullifiers are correctly derived            ✅ Prevents double-spending
  4. New commitments are valid                   ✅ Creates new private notes
  5. No tokens created or destroyed              ✅ Conservation of value
  6. Slippage is within user-specified bounds    ✅ Protects against manipulation

Key Benefits

🔐 TRADE PRIVATELY	No one sees your positions
🛡️ MEV PROTECTED	Zero front-running possible
📊 NO TRACKING	Break address correlation
⚡ INSTANT FINALITY	Mantle L2 speed
💰 LOW FEES	~$0.01-0.05 per swap