Invariant

Invariant is a permissionless, non-custodial automated market maker built as a concentrated liquidity DEX. Launched on Solana mainnet in March 2022, the protocol has since expanded across multiple Solana Virtual Machine (SVM)-compatible blockchains — including Eclipse and Sonic SVM — with the stated aim of becoming the primary liquidity layer across the SVM ecosystem.

The Problem Invariant Addresses

Traditional AMM designs distribute liquidity uniformly across an infinite price curve, meaning the vast majority of deposited capital sits idle at price ranges that rarely or never see trading activity. This inefficiency forces protocols to attract enormous sums in total value locked to achieve competitive trading depth, and it dilutes fee income for liquidity providers.

Invariant was designed to solve this by bringing a concentrated liquidity model to Solana — an approach pioneered by Uniswap v3 on Ethereum — at a time when no comparable implementation existed natively on the Solana blockchain.

How Concentrated Liquidity Works

Rather than spreading deposited assets uniformly, Invariant allows each liquidity provider to specify a custom price range for their position. Liquidity is active only when the trading price falls within the defined range; outside that range the position earns no fees but is also not exposed to price movements in the same way. Providers who correctly anticipate where the market trades can concentrate all of their capital in that band, capturing a far larger share of swap fees relative to their deposit size.

The protocol uses a tick-based system with 0.01% price increments, giving providers precise control over position boundaries. When current market price exits a provider's range, the position automatically shifts to holding only one of the two tokens, functioning similarly to a limit order in that price direction.

Fee tiers on Invariant range from 0.01% for correlated stable pairs such as USDC/USDT up to 0.25% for volatile token pairs. All collected fees are distributed directly to liquidity providers in the relevant pool; Invariant does not take a protocol treasury cut from swap fees. Liquidity providers choose the fee tier when creating or joining a pool, allowing the market to self-select the tier appropriate for each token pair's volatility profile.

Key Products and Features

Swap and smart routing. Invariant's swap interface routes orders across all pools to find the best price, with transactions settling in under 400 milliseconds at near-zero gas cost on Solana.

Permissionless pool creation. Any token pair can be listed by creating a pool; there is no gatekeeping or governance approval required. This makes Invariant a natural venue for new token launches seeking instant on-chain liquidity.

Limit orders. Because concentrated positions that are fully out of range hold only one token, the protocol supports a native limit-order mechanism: a provider places a one-sided position at the target price, and if the market crosses into that range, the position effectively executes a directional swap.

Concentrated farms. Invariant operates a reward distribution system specifically designed for concentrated liquidity, calculating incentive payouts based on the amount of in-range liquidity each position contributes, rather than rewarding all depositors equally regardless of their chosen price range.

Jupiter integration. Invariant's liquidity pools are accessible through Jupiter, Solana's dominant swap aggregator, meaning trades routed through Jupiter can draw from Invariant's liquidity alongside other DEX sources.

Multichain SVM Expansion

Invariant has positioned its multi-chain ambitions explicitly around the SVM ecosystem rather than expanding to unrelated chains. As of mid-2025, the protocol operates on three networks:

• Solana — the original deployment since March 2022.
• Eclipse — an Ethereum Layer 2 running the Solana Virtual Machine. Within roughly six months of launch on Eclipse, Invariant recorded over 300,000 users, more than $500 million in cumulative swap volume, $10 million in TVL, and 530,000 transactions in a single month. It became the most-used application on the Eclipse network during that period.
• Sonic SVM — a gaming-oriented SVM Layer 2 on Solana, where Invariant launched on mainnet in June 2025.

The team has also received an ecosystem funding grant from Aleph Zero, a privacy-focused blockchain using a WebAssembly runtime, and has published early integration work there. Invariant's stated strategy is to serve as a unified liquidity layer across fragmented SVM chains, connecting user bases from Ethereum and Solana through a consistent protocol interface.

Technical Foundation

Invariant's smart contracts are written in Rust and are fully open source on GitHub under the invariant-labs organization. The codebase has been audited by Sec3 (formerly Soteria), a Solana-specialist security firm. The protocol is non-custodial — user funds are held in on-chain smart contracts and are never controlled by the team.

The protocol's mathematical design, including its tick-spacing system and fee accounting, is documented in a publicly available whitepaper. A custom fixed-point arithmetic library (the decimal crate) underpins the pricing calculations.

Ecosystem Fit

Invariant occupies a specific niche in the Solana DeFi stack: a capital-efficient liquidity venue for both established pairs and newly launched tokens, with infrastructure that supports integration by aggregators, yield automation tools, and other DeFi protocols. Its early entry as Solana's first concentrated liquidity AMM, combined with its active expansion across the broader SVM ecosystem, gives it a distinct position relative to other Solana DEXs that have remained single-chain.