Crypto Gloss

Bluefin

Bluefin is a central limit order book (CLOB) perpetuals exchange on Sui Network that migrated from Arbitrum in 2023 to leverage Sui’s 400ms finality, high throughput, and shared object architecture — offering BTC, ETH, SOL, and SUI perpetuals with up to 20x leverage through an on-chain orderbook rather than the AMM pool-based model used by most on-chain perps.

Overview

Bluefin began on Arbitrum as a V1 orderbook perps exchange, then made the strategic decision to migrate to Sui as Sui’s technical capabilities became clear. The core premise: orderbook perps require low latency and high throughput — properties that Sui is better positioned to deliver than Ethereum L2s due to Sui’s parallel execution and object-level concurrency. Bluefin’s CLOB model creates tighter spreads and better price discovery than AMM counterparties (like GMX’s GLP pool), while Sui’s architecture makes running an on-chain orderbook financially viable at scale.

Exchange Architecture

The protocol is built around the following components.

Central Limit Order Book (CLOB)

Unlike GMX/GLP or Adrena’s pool-based counterparty model, Bluefin uses a true order book:

  • Makers post limit orders (bid/ask) — paid maker rebates
  • Takers fill against resting limit orders — pay taker fee
  • Best bid/best offer price discovery in real time
  • No slippage within order size if sufficient depth exists at that level

Why CLOB Works on Sui

  • Sui processes thousands of transactions per second without global state bottleneck
  • Shared object model allows the orderbook (shared object) to be modified by many concurrent transactions
  • 400ms finality allows near-instant order acknowledgment
  • DeepBook (Sui’s native CLOB infrastructure by Mysten Labs) provides base layer primitives Bluefin can build on

Supported Markets

Bluefin supports perpetual futures contracts on:

  • BTC-PERP — Bitcoin perpetual
  • ETH-PERP — Ethereum perpetual
  • SOL-PERP — Solana perpetual
  • SUI-PERP — Sui perpetual
  • Additional assets added via governance votes

All markets settle in USDC (cross-margin across positions is supported).

Trading Features

  • Leverage: Up to 20x cross-margin (varies by asset — BTC 20x, SOL 10x, newer assets lower)
  • Cross-Margin: Single USDC margin account backs all open positions
  • Isolated Margin: Option to isolate margin per position
  • Liquidation: If margin falls below maintenance margin, liquidation engine closes position at market
  • Mark Price: Uses index price (aggregated from centralized exchanges via oracle) not last trade price — prevents manipulation
  • Funding Rate: Perpetual mechanism for longs to pay shorts (or vice versa) to keep perpetual price near index

Migration from Arbitrum

Bluefin V1 operated on Arbitrum. V2 on Sui represented:

  • Full redesign for Sui’s object model and Move VM
  • Onboarding of Sui-native users
  • Lower gas fees (Sui’s gas is dramatically cheaper for users)
  • Abandonment of EVM compatibility in favor of Sui-native quality

BLUE Token

BLUE is Bluefin’s governance and incentive token:

  • Governance — BLUE holders vote on new market listings, fee structures, risk parameters
  • Staking — Staked BLUE may receive a share of protocol trading fees
  • Trading incentives — BLUE emissions reward active traders (reducing effective trading costs)
  • Liquidity mining — BLUE rewards for providing liquidity as makers on the orderbook

Sources

Related Terms