Uniswap (UNI)

What Uniswap is

Uniswap is a decentralized exchange protocol, and UNI is its governance token. The protocol's documentation describes it as "a set of smart contracts that let anyone swap tokens, provide liquidity, or create new markets directly onchain" (developers.uniswap.org, as of September 2026). There is no order book and no intermediary holding your funds. Prices come from a formula applied to the balances sitting in each pool.

UNI does not entitle you to a share of trading fees by default. It is a governance token that controls the protocol's treasury, its fee settings, and its own issuance.

How it works

Uniswap replaces order matching with an automated market maker. Each pool holds reserves of two tokens, and the protocol prices trades using the constant product formula, written as x times y equals k, where x and y are the reserve balances and k is held constant across a swap.

The consequence follows directly from the arithmetic and Uniswap states it plainly: "larger trades relative to pool depth move the price more (known as price impact), while smaller trades execute closer to the current spot price." Depth, not volume, determines what a trade costs you. See slippage for the related mechanics.

Liquidity providers deposit token pairs and earn a share of swap fees. How that position is represented has changed across protocol versions. In v2, providers receive fungible ERC-20 pool tokens representing a proportional share of the whole pool. In v3, positions are ERC-721 nft tokens, because liquidity can be concentrated within a chosen price range rather than spread across all prices, which makes each position distinct. In v4, accounting moved to ERC-6909 balances managed through a position manager, and the architecture added hooks and a singleton pool design that holds all pools in one contract (developers.uniswap.org, September 2026).

Hooks are the significant addition in v4. They let a pool run custom logic at defined points in a swap's lifecycle, which turns pool creation into something closer to programming than configuration.

Fees are set per pool and per version. Uniswap's documentation states that "swap fees are configured by pool and protocol version. These fees accrue to LPs, and protocol fees may apply when enabled through governance." That last clause is the fee switch, and it is a governance decision rather than a default.

The protocol is permissionless and non-custodial. Uniswap states that "anyone can swap, provide liquidity, or create new markets at will," that core contracts are non-upgradeable, and that no single party can pause operations or reverse transactions. Anyone can also create a pool for any token, which is why the presence of a token on Uniswap says nothing about its legitimacy.

Supply and tokenomics

The UNI distribution was set at launch and is documented precisely. Uniswap announced UNI on 16 September 2020, stating that "1 billion UNI have been minted at genesis and will become accessible over the course of 4 years" (blog.uniswap.org, September 2026).

The retroactive airdrop listed above went to every address that had interacted with Uniswap v1 or v2 contracts. The remaining 43 percent of the community allocation was to be distributed through governance over time. Issuance did not stop when the four years ended: Uniswap's governance documentation states that token holders can authorize minting up to 2 percent additional UNI annually.

Governance holds three levers: treasury spending, activation of protocol fees, and that annual minting. The treasury was allocated 40 percent of total UNI supply (developers.uniswap.org, September 2026). Participation requires delegation. Holding UNI does not vote; delegating it, either to yourself or to someone else, does.

History

Uniswap Governance was created in 2020 with the UNI launch, converting a protocol run by its developers into one whose treasury and parameters are decided by token holders.

The protocol itself has moved through distinct architectures. Version 2 established the standard two-token pool with fungible LP tokens. Version 3 introduced concentrated liquidity, letting providers commit capital to a price range and earn more fees per dollar deployed while accepting a narrower band of usefulness. Version 4 introduced hooks and a singleton contract holding all pools, which reduced the gas cost of creating pools and routing trades between them.

Governance took a further step in August 2025, when Uniswap adopted DUNI, a Wyoming-registered Decentralized Unincorporated Nonprofit Association. Membership requires holding any positive amount of UNI and engaging in governance activity, and Uniswap states it does not require personal identity disclosure (developers.uniswap.org, September 2026). The purpose of such a structure is to give the governance body a recognized legal form.

Risks and what to watch

Liquidity providing is not passive income. Providing liquidity exposes you to impermanent loss, the difference between holding two tokens and depositing them into a pool when their relative price moves. Concentrated liquidity in v3 and v4 amplifies both the fee income and that exposure, and a position whose price moves outside its chosen range stops earning fees entirely.

Anyone can create a pool for anything. A token trading on Uniswap has passed no review, and pools for worthless or malicious tokens exist alongside legitimate ones. Verify contract addresses from a source you trust, not from a search result. See rug pull for the common pattern.

Trades on a public network are visible before they settle, which exposes them to front running and other forms of mev. Slippage settings limit the damage but do not eliminate the exposure.

For UNI specifically, the token's value proposition rests on governance rights rather than on cash flows. Protocol fees accrue to liquidity providers unless governance enables a protocol fee, and whether and how that switch is used is a decision that has been debated at length rather than settled. Meanwhile the 2 percent annual minting authority means supply is not fixed.

Core contracts being non-upgradeable is a genuine security property, but the surrounding interfaces, routers and front ends are not the core contracts, and most user losses in decentralized finance happen at those edges rather than in the pools themselves.

Availability of UNI varies by venue and jurisdiction; see where to buy Uniswap and Exchanges.

Frequently asked questions

What does the UNI token do?

UNI is a governance token. Delegated UNI votes on treasury spending, on whether to activate protocol fees, and on minting up to 2 percent additional UNI per year. It does not automatically pay a share of trading fees, which accrue to liquidity providers unless governance switches on a protocol fee.

How many UNI exist?

One billion were minted at genesis on 16 September 2020, to become accessible over four years. After that four-year period, a perpetual inflation rate of 2 percent per year applies, exercised through governance. Supply is therefore not permanently capped at one billion.

How was UNI distributed?

Over four years: 60 percent to the community, 21.266 percent to the team, 18.044 percent to investors, and 0.69 percent to advisors. Fifteen percent of the total was immediately claimable, including a retroactive airdrop of 400 UNI to roughly 251,534 addresses that had used Uniswap v1 or v2.

What is the difference between Uniswap v2, v3 and v4?

Version 2 uses fungible ERC-20 LP tokens over full-range pools. Version 3 introduced concentrated liquidity with positions represented as ERC-721 NFTs. Version 4 uses ERC-6909 accounting through a position manager, adds hooks that run custom logic during a swap, and holds all pools in a single contract.

Is Uniswap custodial?

No. Uniswap's documentation states that anyone can swap, provide liquidity or create markets at will, that core contracts are non-upgradeable, and that no single party can pause operations or reverse transactions. Your funds remain in your own wallet until a swap executes.