> ## Documentation Index
> Fetch the complete documentation index at: https://docs.vela.monolithsystematic.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Changelog

> Release history for Vela Exchange

## v0.2.0 — April 2026

### Phase 2 — Production Engine

* Parallel signature verification (100k+ ops/sec ceiling)
* HFT rolling 20-window nonce scheme (20 concurrent in-flight orders)
* Client order IDs with cancel-by-client-id
* Copy-on-Write delta buffer (atomic FOK/IOC, 841ns rollback)
* Batched response sending
* Auto-cancel on credit ratio breach
* Configurable maker/taker fees (−1 bps maker rebate, 5 bps taker)
* DA layer (content-addressed fill storage, `/orders/:id/da-proof`)
* Depth-32 sparse Merkle tree with O(dirty×32) root recompute
* Forced inclusion / delayed inbox (`/force-include`)

### Phase 3 — Mainnet Readiness

* ERC20 on-chain deposits (USDC two-step approve then deposit)
* Real OHLCV candlestick data from trade history (LIVE/SIMULATED badge)
* Full WebSocket real-time feeds (orderbook, trades, markets, account)
* Private L3 account feeds with signature authentication
* 16 spot markets (added PEPE, WIF, JUP, PENDLE, EIGEN)
* Referral program (20% taker fee split, 90 days)
* Trading leaderboard (`/leaderboard`)
* Comprehensive benchmark suite (8 criterion benchmarks)

### Performance (v0.2.0)

* 1.38μs p50 match latency
* 725k ops/sec
* 5.8× faster than Pulse (leading open-source DEX engine)
* 142+ tests passing

***

## v0.1.0 — Public Beta (April 2026)

### Exchange

* 11 spot markets: BTC, ETH, SOL, AVAX, MATIC, LINK, UNI, ARB, OP, AAVE, DOGE (all vs USDC)
* Central limit order book with price-time priority matching
* Order types: Limit GTC, IOC, FOK, Post-Only
* Wallet-signed orders and cancellations (MetaMask via personal\_sign)
* Live order books — CoinGecko price feeds update every 60 seconds

### On-Chain Settlement

* VelaSettlement smart contract deployed to Ethereum Sepolia
* Contract: `0xAa8E680c11a883F9bf6eb980B2D4E9D18DD25686`
* On-chain ETH deposits via `depositETH()` payable function
* Operator-signed on-chain ETH withdrawals
* 7-day emergency exit timelock for trustless fund recovery

### Infrastructure

* Rust matching engine on fly.io (sjc region)
* Persistent state via 1GB fly.io volume — snapshots every 60 seconds
* Rate limiting: 20 orders/min, 5 deposits/min per wallet
* Input validation with overflow protection
* Admin state endpoint with token authentication

### Frontend

* Next.js 14 with TypeScript strict
* Robinhood-inspired marketing landing page
* Animated hex canvas (Bitcoin genesis block data)
* Live mini order book in hero section
* Full exchange: markets, dashboard, analytics, history
* Deposit and withdrawal pages with on-chain ETH support
* Mintlify documentation at monolithsystematicllc.mintlify.app

### Performance

* 1.08μs p50 match latency
* 57.3k ops/sec
* 4.7× faster than Pulse (leading open-source DEX engine)
* 73/73 tests passing

## Upcoming

* Mainnet deployment
* On-chain fraud proof verifier
* Celestia / EigenDA integration
* Series 3 / regulatory compliance