Crypto Gloss

Retro Finance

Retro Finance is a Polygon-native ve(3,3) decentralized exchange built on the Solidly codebase — featuring the dual-token oRETRO/RETRO model (an options token design to reduce sell pressure), veRETRO vote-locked governance, weekly emission auctions, and CLMM-based concentrated liquidity pools managed by Gamma Strategies, positioning itself as the capital-efficient ve(3,3) venue on Polygon competing with Pearl, QuickSwap, and Meshswap.

Overview

Retro Finance launched in 2023 on Polygon as part of the second-wave Solidly fork ecosystem, following the original Solidly launch on Fantom in early 2022 (by Andre Cronje) and the subsequent proliferation of forks across chains (Velodrome on Optimism, Thena on BNB Chain, Pearl and Retro on Polygon).

Retro’s core differentiation from generic Solidly forks was the oRETRO options token — a mechanism designed to reduce pure sell pressure from RETRO farming without eliminating the economic value to farmers.

Protocol Architecture

The protocol is built around the following components.

Stable + Volatile Pools

Like all Solidly forks, Retro supports two pool types:

  • Stable pools: for correlated assets (USDC/USDT, WMATIC/stMATIC, USDC/DAI); uses StableSwap curve (near 1:1 pricing with minimal slippage in peg range)
  • Volatile pools: for uncorrelated assets (WMATIC/USDC, RETRO/USDC, WETH/USDC); uses standard constant-product formula x*y=k
  • Fee tier: separate fee parameters for stable vs volatile (stable: 0.05%; volatile: 0.3% default; adjustable by governance)

Concentrated Liquidity (CLMM)

Unlike the original Solidly (V2-style only), Retro integrated Uniswap V3-style concentrated liquidity pools:

  • Gamma Strategies integration: Automated CLMM LP management; Gamma manages liquidity positions (width, rebalancing) for LPs who prefer passive management
  • Manual CLMM: Users can manually set price ranges (Uniswap V3-style tick system)
  • Capital efficiency: CLMM pools offer 10-100× capital efficiency vs full-range V2 (better slippage for same TVL)

Dual-Token System

The following sections cover this in detail.

RETRO

RETRO is the base governance token:

  • Total supply: defined at launch, no mint beyond schedule
  • Uses: redeem oRETRO at strike price, participate in governance, secondary market trading
  • Liquidity: RETRO/USDC pool on Retro Finance itself (bootstrapped with protocol-owned liquidity)
  • Price: market-driven on DEX; fundamental floor = oRETRO exercise value

oRETRO (Options Token)

oRETRO is the emission token — an ERC-20 call option on RETRO at a discount:

  • Farmers receive oRETRO, not raw RETRO, when earning LP emissions
  • Exercise: pay discount × RETRO_market_price in USDC → receive 1 RETRO
    Example: RETRO = $1.00; discount = 50%; pay $0.50 USDC → receive 1 RETRO
  • Options design: oRETRO has value only if marketRETRO > exercise price; at RETRO = $0, oRETRO worthless
  • Effect: farmer must pay USDC to unlock RETRO → payment goes to protocol treasury (or veRETRO)
  • Anti-sell pressure: farmer can’t dump raw RETRO immediately (must pay exercise price first), natural filter for committed participants
  • Non-zero discount: protocol must set discount aggressively enough that exercising is worthwhile vs finding RETRO on market; too low discount → farmers abandon oRETRO

veRETRO

veRETRO is the vote-locked governance token:

  • Acquire: lock RETRO for 1 week to 26 weeks (6 months)
  • Non-transferable: veRETRO is an NFT but non-tradeable in core ve(3,3) interaction
  • Voting power: proportional to lock time × amount (max lock = max voting power)
  • Weekly gauge voting: veRETRO holders vote each epoch (1 week) to direct RETRO emissions to pools
  • Bribes: protocols bribe veRETRO holders to vote for their pool → incentivize deep liquidity
  • oRETRO exercise proceeds: USDC paid to exercise oRETRO → split between protocol treasury and veRETRO holders who voted for that pool

Emission and Bribe Mechanism

The incentive structure is detailed below.

Weekly Emission Auction

Each epoch (7 days):

  1. RETRO emissions determined by schedule (reducing over time)
  2. veRETRO holders vote on pool gauge weights
  3. Emissions distributed to LP positions in each pool proportional to pool’s gauge weight
  4. LPs receive oRETRO (not RETRO) as reward
  5. oRETRO holders choose to exercise (pay discount → get RETRO) or sell oRETRO on secondary market

Bribe Flow

External protocols that want deep liquidity in a specific pool (e.g., a new stablecoin protocol wanting USDC/USDT depth):

  1. Deposit bribe tokens (USDC, their own token, etc.) into Retro’s bribe contract for that pool
  2. veRETRO holders who vote for that gauge in this epoch claim the bribe proportionally
  3. More bribe value → more veRETRO votes → more RETRO emissions → deeper LP incentive

Polygon Context

Retro competes in Polygon’s crowded DEX landscape:

  • QuickSwap: Uniswap V2 fork evolved to CLMM (Algebra-based); largest Polygon DEX by TVL/volume
  • Pearl: fellow Solidly/ve(3,3) fork on Polygon; differentiated by RWA focus (Ondo USDY pools)
  • Meshswap: Uniswap V2 fork with community farming
  • Uniswap V3 native: also deployed on Polygon PoS and zkEVM

Retro’s positioning: be the ve(3,3) layer for DeFi-native assets (yield tokens, governance tokens, new project liquidity), while Pearl focuses on RWA liquidity.

Sources

  1. Retro Finance Documentation — Retro Finance Team, 2023. Core protocol docs covering oRETRO options token architecture (oRETRO = ERC-20 call option: exercise any amount up to veested RETRO emission balance; exercise() function: caller provides USDC (amount = option amount × strike price); protocol burns oRETRO → mints RETRO → sends to caller; USDC received: split (configurable, typically 50/50 treasury/veRETRO); strike price: set as percentage of TWAP (time-weighted average price) of RETRO; TWAP source: on-chain Retro RETRO/USDC pool TWAP; strike recalculated per exercise: market-linked, not fixed; discount parameter: set by governance (initially 50%)); CLMM integration (Retro deployed Algebra Protocol’s CLMM identical to Camelot V3 on Arbitrum; key difference from Uniswap V3: Algebra uses a single adaptive fee rather than fixed fee tiers; adaptive fee: increases during volatility, decreases during calm → optimizes LP income; Gamma Strategies integration: Gamma’s vault contracts deployed as Retro CLMM managers; hypervisors (Gamma’s LP positions): users deposit assets → Gamma manages range rebalancing; auto-compound: Gamma auto-compounds fees back into positions; range strategies: narrow (higher fees, more rebalancing), mid (balanced), wide (passive, less rebalancing)); veRETRO (lock RETRO for 1-26 weeks → receive veRETRO NFT; vote per epoch (Thursday reset); votes set gauge weights for next epoch; veRETRO decay: voting power = amount × remaining_time / maxTime; max lock = max voting power throughout lock period); protocol fees (trading fees: 100% to LPs (no protocol cut by default in Solidly model); bribe income to veRETRO voters; oRETRO exercise income (USDC) split to treasury/veRETRO voters)..]
  1. “Solidly Forks Matrix: Velodrome, Thena, Retro, Pearl — ve(3,3) Across Chains” — DeFi Protocol Research, 2023. Comparative analysis of the major Solidly-derived ve(3,3) DEXes deployed on non-Fantom chains — Velodrome (Optimism), Thena (BNB Chain), Retro (Polygon), Pearl (Polygon) — examining how each adapted the base Solidly model, their key differentiations (stable pools, CLMM, oToken, RWA integrations), and performance relative to chain liquidity.
  1. “Options Token Design in DeFi: oRETRO, oTHENA, and Emission Incentive Engineering” — DeFi Tokenomics Research, 2023. Analysis of the options token (oToken) innovation in ve(3,3) DEXes — how oToken emission instead of direct token emission reduces sell pressure, the second-order effects on protocol treasury (USDC inflow from exercise events), and whether oToken designs actually improve long-term token value vs standard ve(3,3) emissions.
  1. “Polygon DEX Landscape 2023: QuickSwap, Retro, Pearl, Meshswap Competition” — Polygon DeFi Research, 2023. Analysis of Polygon’s DEX competition post-Uniswap V3 deployment on Polygon — how QuickSwap maintained dominance via CLMM (Algebra), and how Retro and Pearl found niches in the ve(3,3) governance liquidity layer targeting specific asset types (DeFi governance tokens for Retro, RWAs for Pearl) rather than competing head-to-head with QuickSwap for commodity stablecoin volume.
  1. “Gamma Strategies: Concentrated Liquidity Management for ve(3,3) DEXes” — LP Management Research, 2023. Analysis of Gamma Strategies’ role as an automated CLMM LP manager for multiple ve(3,3) DEXes (Retro, Pearl, Thena, Quickswap) — the hypervisor architecture, range rebalancing strategies, fee auto-compounding, and how Gamma enables “passive Uniswap V3 LP” that can integrate with ve(3,3) gauge incentives.

Related Terms