Over 700k users joined the waitlist, and today we’re excited to announce that the Uniswap Extension is now *__available for everyone__* to [download on Chrome](https://uniswapwallet.onelink.me/8q3y/nc8iyafr).

At Uniswap Labs, we're on a mission to unlock value by bringing it onchain. We know that for many, the biggest challenge in using crypto is self-custody. That's why we created the Uniswap mobile app, which quickly became one of the fastest-growing self-custody wallets after its launch last April. Now, we're bringing that same beautiful experience to your desktop with Uniswap Extension – the first wallet to live in your browser's sidebar.

<Video source="//videos.ctfassets.net/oc3ca6rftwdu/DYRa9lVYyifE6mQupCAF0/699e51daf23047c4574e561e7e1fbc6a/Final-extension-video.mp4" description="Uniswap-Extension-Launch-Video" />

# Everything you need, right in your sidebar
It's time for an upgrade from the 1990s pop-up design used by most crypto wallets. Uniswap Extension lives in your browser’s sidebar, staying with you no matter where you are on the web. No more pop-ups or easy-to-lose transaction windows. Swap, sign transactions, and send or receive crypto right from the sidebar.

Designed with simplicity, security, and ease of use in mind, the extension makes interacting with onchain apps delightful. Never sign blind again, with easy-to-understand signature requests. Don’t worry about losing track of transactions, with a streamlined transaction request queue. Plus, access the extension anytime with keyboard shortcuts – just press cmd/ctrl + shift + U.

![Uniswap Extension Sidebar](//downloads.ctfassets.net/oc3ca6rftwdu/6fzY9zvp2097S8n2VlxfPE/b9a3b13344576fa741eef221ef6baaf9/sidebar-showcaes.gif)

# Beautiful, simple swapping
We build products for faster, safer, simpler swapping. Uniswap Extension is the next piece of that puzzle – with built-in swapping, users have direct access to Uniswap’s trade execution in just a few clicks (with routing across the Uniswap Protocol and UniswapX). And with automatic [swap protection](https://support.uniswap.org/hc/en-us/articles/18814993155853-What-is-Swap-Protection), your funds are safeguarded against sandwich attacks and front-running.

The extension is built to work seamlessly with other Uniswap products, which is why we’ve integrated shortcuts to Uniswap web app’s ‘Buy Crypto’ feature and 1-click access to price charts and token data directly from the extension through [Uniswap Explore](https://app.uniswap.org/explore).

Whether you prefer swapping in the sidebar or through the Uniswap web app, we’ve built the best swapping experience across all Uniswap products.

![Swap in Sidebar](//images.ctfassets.net/oc3ca6rftwdu/1LZm6e3VS6A1lyw1OOEZmC/3cb01539d021c9c3c9c06bcb906e03ed/swap-in-sidebar.gif)

# Built for a multichain world
Out of the box, the extension supports Ethereum, Base, Arbitrum, Optimism, Polygon, Blast, ZKsync, Zora Network, BNB Chain, Avalanche, and Celo – and shows all of your tokens across networks in one place, so you never need to switch chains to see your assets.

In fact, you don’t need to manually switch chains at all. We’re excited to launch with Auto Network functionality – the extension automatically switches chains based on the application you’re using. Never manually approve network changes again.

![Network Switch Demo](//images.ctfassets.net/oc3ca6rftwdu/6LlcGPTOpal4k5Ilp2IHuu/cc071198f4b09087ca2be7bd54f1ba35/NETWORK-SWITH-2.gif)

We’ll continue to add features to support simple, secure access to any chain on the extension, with custom RPC capabilities and in-app bridging coming soon.

# Secure self-custody
Uniswap Extension is a self-custody wallet. While you are responsible for your assets, we've taken steps to make the extension as secure as possible, including [audits by Trail of Bits](https://github.com/trailofbits/publications/blob/master/reviews/2024-02-uniswap-wallet-browserextension-securityreview.pdf). We’ve also made the [wallet source code](https://github.com/Uniswap/interface/tree/main) available for anyone to review.

While audits and source-available code contribute to the Uniswap Wallet's security, please practice caution when managing your assets and signing transactions. More on [how to stay safe using a self-custody wallet here](https://support.uniswap.org/hc/en-us/sections/17522916665613-Crypto-Security-and-Scams).
# How to start using the Uniswap Extension
Uniswap Extension is available now on Chrome. To add Uniswap Extension to your browser, visit the [Chrome Web Store](https://chromewebstore.google.com/detail/uniswap-extension/nnpmfplkfogfpmcngplhnbdnnilmcdcg) and select “Add to Chrome”.

Once you’ve added the extension, you’ll be ready to set up your account. If you have the Uniswap mobile app already installed on your phone, you can scan the QR code to import your account – no need to type in a seed phrase or private key. New users can [import an existing seed phrase](https://support.uniswap.org/hc/en-us/articles/11380692567949-How-to-import-a-recovery-phrase-into-the-Uniswap-Wallet) from another wallet or create a new account.

![Onboarding via QR](//images.ctfassets.net/oc3ca6rftwdu/3NtMU486HdbmS3fAgaqapk/3542957e8a8abba9e03a8aa5dab737d8/ONBOARDING_VIA_QR_COD.gif)

*__Uniswap Extension is now available for everyone. [Download the extension today.](https://chromewebstore.google.com/detail/uniswap-extension/nnpmfplkfogfpmcngplhnbdnnilmcdcg)__*

Today we’re excited to announce that the Uniswap Extension is now available for everyone to download on Chrome.

Uniswap Extension is Now Available for Everyone

Uniswap Labs is making it simple to transfer crypto from centralized exchanges to the Uniswap self-custody wallet. With the new ‘Transfer from centralized exchange’ functionality, you can transfer money from Coinbase and Robinhood to your [Uniswap mobile app](https://wallet.uniswap.org//?utm_medium=blog&utm_source=transfer-from-CEX&utm_campaign=blog&utm_creative=download) in a few clicks. No more copy-pasting or sending funds to the wrong address.

![Receive Crypto from CEX](//images.ctfassets.net/oc3ca6rftwdu/2tvGVbv5btqNQJFG00U7ow/48c3b05d49b441fe2e7af8c7fcd6de4c/Screenshot_2024-05-16_at_9.59.23_AM.png)

# Go direct to DeFi
Research shows that about [65% of Uniswap interface users have used a CEX prior to their first swap on Uniswap](https://x.com/Uniswap/status/1758889878329131213). But transferring funds from a CEX to a crypto wallet (like the Uniswap mobile app) can be confusing. Between copy-pasting 0x addresses and making sure you’re on the right network, funds can easily be sent to the wrong place.

That’s why we’re excited to add ‘Transfer from CEX’ functionality into the Uniswap mobile app. Making it easy for users to simply and safely transfer crypto from their centralized exchange accounts to the Uniswap mobile app.

# How to transfer crypto from a CEX to the Uniswap mobile app

![Transfer from CEX](//images.ctfassets.net/oc3ca6rftwdu/5jgjNuXbYCTw5WeutRH9PD/06a01f2f6f22622c740e4a245b72340b/cexwidescreen.gif)

Transferring crypto from a centralized exchange to the Uniswap mobile app is simple:

1. Select the ‘Receive Crypto’ icon in the Uniswap mobile app (make sure you’re on the latest version)
2. Choose your provider (currently available for Coinbase Pay and Robinhood Connect)
3. Select the asset you want to transfer to the Uniswap mobile app
4. Confirm the transfer

And that’s it!

# The future of fiat onramping
We believe users should be able to choose their fiat onramp provider. That’s why we’re constantly adding new providers to the Uniswap mobile app. Whether that’s Coinbase, Moonpay, Robinhood Connect, Transak, or other onramp providers (varies by region).

To get started, [download the Uniswap mobile app](https://wallet.uniswap.org//?utm_medium=blog&utm_source=transfer-from-CEX&utm_campaign=blog&utm_creative=download) today.


Uniswap Labs is making it simple to transfer crypto from centralized exchanges to the Uniswap self-custody wallet.

More Options to Go Direct to DeFi: Transfer from CEX

Users of the [Uniswap mobile app](https://wallet.uniswap.org//?utm_medium=blog&utm_source=robinhood-blog&utm_campaign=robinhood&utm_creative=mobile-app) can now buy crypto with a debit card, via bank transfer, or directly from their Robinhood balance using Robinhood Connect (available only for users in the United States). To celebrate this launch, Robinhood is giving $10 of USDC to people who buy at least $10 of crypto using Robinhood Connect in the Uniswap mobile app. The campaign only applies for first time Robinhood Connect customers.

![Robinhood on Uniswap](//images.ctfassets.net/oc3ca6rftwdu/5NtHWQlAxYgCBknE3DJtdt/4afb68011b5332b9601dc6a9e3c5df01/onboarding-robinhood_copy.png)

# Simple self-custody
The Uniswap mobile app is one of the fastest growing self-custody wallets, built by the most trusted team in DeFi. The wallet provides users with a safe and secure way to swap and store crypto. Robinhood Connect is the latest addition to the Uniswap mobile app’s selection of fiat onramp providers – a list which already includes Coinbase Pay, Moonpay, and others.

# How to buy crypto on the Uniswap mobile app with Robinhood Connect
To purchase crypto with Robinhood Connect on the Uniswap mobile app, follow these steps:

1. Select the buy icon on the app.
2. Choose the crypto you want to purchase.
3. Enter the amount you want to buy.
4. Select “Continue” to proceed.
5. You’ll be presented with options for which provider you’d like to use to complete your purchase. Note: available providers may vary by region. Robinhood Connect is available only in the United States.
6. Select the provider you’d like to use (in this case, Robinhood Connect).

Users who purchase $10 of crypto using Robinhood Connect in the Uniswap mobile app will receive $10 of USDC in their Robinhood account.

![Robinhood Onboarding](//images.ctfassets.net/oc3ca6rftwdu/19RhogV7sd3I9y2FQr5EqL/f62e91cf7f334277c18fcd439b011c4a/onboarding-robinhood.gif)

# Download the Uniswap mobile app
Users can purchase crypto with Robinhood Connect today in the Uniswap mobile app today – available on iOS and Android. [Download the Uniswap mobile app to get started.](https://wallet.uniswap.org//?utm_medium=blog&utm_source=robinhood-blog&utm_campaign=robinhood&utm_creative=mobile-app)

Users of the Uniswap mobile app can now buy crypto with a debit card, via bank transfer, or directly from their Robinhood balance using Robinhood Connect.

Buy Crypto Using Robinhood Connect on the Uniswap Mobile App

We are excited to begin rolling out the [Uniswap Extension](https://blog.uniswap.org/all-new-uniswap-extension-and-more-tools-for-users-to-swap-smarter) to [users on the waitlist](https://x.com/Uniswap/status/1764305491172159596?s=20). Users will be granted access to the Uniswap Extension on a first-come, first-served basis.

# How to know if you have access
Mobile push notifications have gone out to the first wave of users who have early access to the Extension!

![Extension Notification](//images.ctfassets.net/oc3ca6rftwdu/mHcGDJ4PllF0VvKBl81Rb/d600d52cc4c3854bf0eaacbca88fbe56/notification.gif)

If you received a push notification, please use [this link](http://uniswap.org/ext) to download the Extension. Once you have it installed, you will be prompted to enter your uni.eth username. If the uni.eth username associated with your mobile device has been granted access – you will be able to import your wallet(s) and use the Uniswap Extension.

![Extension Onboarding](//images.ctfassets.net/oc3ca6rftwdu/7u1shYr0p5706DSjFnacLD/8165c24b7b3221b70a58027cbc38fe1f/extension-username-check.gif)

If you have not received a push notification about early access to the Extension, but have joined the waitlist by claiming your uni.eth username, we haven’t forgotten about you! We are giving access to more users from the waitlist every day, so make sure your push notifications are turned on for the Uniswap mobile app.

# Extension still in beta
Note that the Uniswap Extension is still in beta, so please consider the software still in development. Help us make the Extension better by [giving us feedback.](https://docs.google.com/forms/d/e/1FAIpQLSeL1l34nsuTfymPn5LVpovY7W57oc0oj53GNnpt0QG1qRAzqw/viewform)

# Joining the waitlist
If you are not on the waitlist yet, you can [join by claiming your free uni.eth username](https://wallet.uniswap.org/?utm_medium=blog&utm_source=blog&utm_campaign=extension-beta&utm_creative=join-waitlist#waitlist) in the Uniswap mobile app. When you claim your uni.eth username, you are automatically added to the waitlist.

We are excited to begin rolling out the Uniswap Extension to users on the waitlist.

Access the Uniswap Extension Beta

__Today we’re excited to announce three new releases to help users swap smarter: the Uniswap Extension, Limit Orders, and Data & Insights.__

Since the beginning, we’ve focused on building products to help users swap anytime, anywhere on the web. A lot has changed since we first launched – the Uniswap Protocol has powered almost $2 trillion in swap volume, helping millions of users swap onchain through both our web and mobile app – and now, we’re expanding our product suite even further.

<Video source="//videos.ctfassets.net/oc3ca6rftwdu/3YKbsOKPueOqauo4ERuhS1/1759e5bac4aaf52b04dc952d27e13ee4/Swap-Smarter.mp4" description="Swap Smarter with Uniswap" />

With enhancements to the Uniswap platform, we aren’t just helping people swap – we’re helping them swap *smarter* with a unified platform that enables faster, safer, more informed swapping.

# Introducing the Uniswap Extension
Between pop-ups and easy-to-lose transaction windows, extensions just aren’t easy to use. That’s why we’re excited to expand Uniswap’s wallet offering with the Uniswap Extension.

![Uniswap Extension](//images.ctfassets.net/oc3ca6rftwdu/1zSKb6DnUuWzk5xbrP3eBP/05925d31afeb3acf5692acea1f294fba/extension-gif.gif)

The Uniswap Extension is the first wallet extension to live in your browser’s sidebar, persisting no matter where you are on the web. So you can swap, sign transactions, and send or receive crypto without obstructing your window or losing your place.

[Join the waitlist to get early access to the Uniswap Extension →](https://wallet.uniswap.org/?utm_medium=blog&utm_source=blog&utm_campaign=swap-smarter&utm_creative=join-waitlist#waitlist)
# Choose your price with Limit Orders
Buy and sell tokens at your price, on your terms, without having to watch the market – with Limit Orders, now live on the Uniswap web app.

![Place Limit Order](//images.ctfassets.net/oc3ca6rftwdu/1QKa9KWKNrZpdzIzbTIX3g/a3492e19fb1eb2a4ef7b4ee97751f3fd/Area.gif)

Users can place a Limit Order for any token on the Uniswap interface, with any predefined price and duration, up to a year, on Ethereum. If the market for that token reaches the specified price, the swap executes. If it does not reach the specified price within the set timeframe, the swap expires and is never executed. This feature provides users with the ability to execute trades automatically at their desired price, without needing to constantly watch the market.

Limit Orders are powered by UniswapX, so they cost zero gas to place and execute.

[Learn more about Limit Orders →](https://blog.uniswap.org/limit-orders/?utm_medium=blog&utm_source=blog&utm_campaign=swap-smarter&utm_creative=learn-more)
# Charts charts charts
For those who thrive on information, speed, and precision – we’ve added updated Token Detail Pages and all new Pool Detail Pages directly into the web app.

![Swap in Page](//images.ctfassets.net/oc3ca6rftwdu/3TCsdW1XeKkfgSK9WboRQi/83f1a422b52fb35635889ccc36f10262/pepe.gif)

Now integrated fully into the interface, these real-time charts, transaction logs, pool data, and project information bring data and insights into your swapping flow. These pages aren’t just built for research. Users can also swap, buy, send, and place a limit order directly from these pages – making the entire process, from research to execution, seamless.

[Learn more about Token Detail Pages and Pool Detail Pages →](https://blog.uniswap.org/data-and-insights/?utm_medium=blog&utm_source=blog&utm_campaign=swap-smarter&utm_creative=learn-more)
# Start swapping smarter
The new Uniswap Extension, Limit Orders, and fully integrated Token Detail Pages and Pool Detail Pages expand the Uniswap product suite to create a seamlessly integrated platform for all the ways you swap.

[Start swapping smarter with Uniswap today →](http://smarter.uniswap.org/?utm_medium=blog&utm_source=blog&utm_campaign=swap-smarter&utm_creative=start-swapping-smarter)

Today we’re excited to announce three new releases to help users swap smarter: the Uniswap Extension, Limit Orders, and Data & Insights.

All New Uniswap Extension and More Tools for Users to Swap Smarter

Today we are excited to roll out the most expansive Limit Order offering in DeFi. Users can now place Limit Orders for any ERC-20 token on Ethereum on the [Uniswap web app](http://app.uniswap.org). Powered by UniswapX, Limit Orders leverage onchain and offchain liquidity, have no gas cost, and can be placed for any swap size – with no minimum requirements. 

<Video source="//videos.ctfassets.net/oc3ca6rftwdu/1MnFd3fNOpLfvDgZDO3rot/67813d890806a1798fdf5212dead28a4/LIMIT-ORDERS-FULL-VIDEO-FOR-BLOG.mp4" description="Limit Orders are now live" />

# Choose your tokens, choose your price
Limit Orders give users the ability to execute trades automatically at their desired price, without needing to constantly watch the market. When placing a Limit Order, users can set the price at which they wish to buy or sell a token within a specific timeframe.

If the market hits your designated price and a UniswapX filler picks up your swap, your order will execute automatically with zero gas cost. And if the order is not filled in the timeframe you set, the order expires and there are never any costs for expired orders. Users do need to pay gas to cancel a Limit Order.
# How to place a Limit Order
To place a Limit Order on Uniswap, follow these steps:

__1. Access the Limit feature:__ In the Uniswap interface, navigate to the swap page and select the "Limits" tab.

__2. Select tokens:__ Choose the input and output tokens for your swap.

__3. Set exchange rate and duration:__ Specify your desired price and how long the order should remain active.

__4. Place your trade:__ Press “Submit”; this costs zero gas, just like placing a standard UniswapX order.

![Place Limit Order](//images.ctfassets.net/oc3ca6rftwdu/1QKa9KWKNrZpdzIzbTIX3g/a3492e19fb1eb2a4ef7b4ee97751f3fd/Area.gif)

*Note that any time you approve a new token with Permit2, there is a gas cost associated. Once a token has been approved, there is no gas cost required for placing Limit Orders for that token.*

# Live now on the Uniswap interface
Start swapping smarter with Limit Orders – available for any token supported on the Uniswap interface, at any price, with zero gas cost. Limit Orders are now live on the [Uniswap web app](http://app.uniswap.org).

We are excited to roll out the most expansive Limit Order offering in DeFi. Users can now place Limit Orders for any token on Ethereum on the Uniswap web app.

Set and Forget Swaps: Introducing Limit Orders on Uniswap

The [Uniswap web app](http://app.uniswap.org) has a brand new Explore tab – with updated Token Detail Pages and all new Pool Detail Pages. These pages provide in-depth price charts, detailed transaction logs, liquidity data and more for tokens and pools on Ethereum, Arbitrum, Polygon, Optimism, Base, Avalanche, and Binance Smart Chain.

<Video source="//videos.ctfassets.net/oc3ca6rftwdu/67i0wtcIUxyN37fvD4ILXr/986c14626e8e6066bce178e82c577665/C_Data_Insights_16x9_r6.mp4" description="Data & Insights are now live" />

# Insights aggregated in one place
Gone are the days of tab-switching between the Uniswap interface and scattered websites for token price and pool data. Users now have access to advanced Uniswap Protocol analytics directly through the Uniswap web app, including:

__Upgraded Token Detail Pages__ with real-time price and TVL plots, line and candlestick charts, token stats, project information, and transaction logs of recent swaps for any token supported on the Uniswap interface.

__All New Pool Detail Pages__ provide extensive information on pool volume, fees generated by pools, recent transactions, and other data like pool age for every pool supported on the Uniswap interface.
# Never leave the page with embedded swaps
Token Detail Pages and Pool Detail Pages aren’t just built for research. Users can also swap, buy, send, and place a limit order directly from these pages – making the entire process, from research to execution, seamless.

![Swap in Page](//images.ctfassets.net/oc3ca6rftwdu/3TCsdW1XeKkfgSK9WboRQi/83f1a422b52fb35635889ccc36f10262/pepe.gif)

# Live now on the Uniswap web app
The new Explore tab is rolling out today on the [Uniswap web app](http://app.uniswap.org). With real-time price charts, detailed liquidity data, and transaction logs, these pages help users swap smarter – enabling discovery, research, and swapping all in one place.

The Uniswap web app has a brand new Explore tab – with updated Token Detail Pages and all new Pool Detail Pages.

Discover, Research, Swap: Uniswap’s All New Explore Tab

Today we’re excited to launch uni.eth — your unique web3 username. Turn your 0x address into a readable username that's supported across web3. Users can now claim their uni.eth username for free in the [Uniswap mobile app](https://wallet.uniswap.org/).

<Video source="//videos.ctfassets.net/oc3ca6rftwdu/2wdxtQ9X9IXA2eTXDCEKVE/6dad8e31d4bbac52f6101b75153e9163/Launch_Video.mp4" description="Introducing usernames" />

# Transform your 0x address into a readable username
0x addresses are clunky and hard to read, making for a less-than-ideal user experience. Usernames change that, giving users a human-readable onchain address that’s easy to remember and use across web3. Users can claim their uni.eth usernames for free in the Uniswap mobile app – making getting started onchain that much easier.

![Feature callout: uni.eth in mobile app](//images.ctfassets.net/oc3ca6rftwdu/327k8JoJ8SEuI42MTGairy/dc0b949ee2870e137ac58cfcd6736db1/300.png)

# Supported everywhere in web3
uni.eth usernames are built on ENS infrastructure, using ENS subdomains – so they’re supported across the thousands of apps that support ENS names, even outside of Uniswap products.

# Customizable profile
Beyond just a username – when you claim your uni.eth username in the Uniswap mobile app, you can also customize your public profile. Add personality to your wallet by choosing an avatar, adding your bio, and linking socials. So when anyone looks up your uni.eth username, they’ll see more than just a 0x address. Customizability is completely optional.

<Video source="//videos.ctfassets.net/oc3ca6rftwdu/4xrpW7w1OOymgKmb5l1W5s/2d944fa566a5e7d04fbaa860f3ca3ce4/BLOG-FLOW-FINAL-FINAL.mp4" description="Demo: How to claim your username in the app" />

# How to claim your uni.eth
Claiming your uni.eth username is free and easy. Note that your uni.eth can only be claimed in the Uniswap mobile app ([download the mobile app here](https://wallet.uniswap.org/)). Existing users will be prompted to claim their uni.eth with the latest app update. Alternatively, users can navigate to Settings within the Uniswap mobile app, select the address they’d like their uni.eth to be associated with, select Nickname, and select Claim a Username.

[Claim your uni.eth username today →](https://uniswaplabs.onelink.me/YOC1/i83qmhls)

Today we’re excited to launch uni.eth – your unique web3 username. Users can now claim their uni.eth username for free in the Uniswap mobile app.

Introducing uni.eth – Your Unique Web3 Username

You all love v2 so much, we’re bringing it to you everywhere. Uniswap v2 is live on Arbitrum, Polygon, Optimism, Base, Binance Smart Chain, and Avalanche. Seamlessly swap and provide liquidity on v2 on all supported chains directly through the [Uniswap interface](https://app.uniswap.org). With both v2 and v3 available across all supported networks, users have the flexibility to choose between simplicity with v2 and more advanced features with v3.

# Simpler experience for LPs
While v3 offers advanced capabilities for more active liquidity providers (LPs), v2 offers a more simple LP experience. Unlike v3, pools on v2 cover the entire price range of the pool by default — reducing the need for active management and monitoring as an LP.

# Savings on swaps
Users already save on gas fees when swapping with v3 on non-Ethereum chains. v2 allows for even more gas savings — making swaps incredibly cost effective, averaging under a dollar on L2s like Optimism and Arbitrum, compared to [$35 average cost to swap on Ethereum](https://etherscan.io/gastracker). Plus, users benefit from almost no MEV on L2s, due to sequencers — particularly helpful for swapping longtail assets, which are more prone to losses due to MEV.

For users looking to swap using v2, you can visit app.uniswap.org, select your network and the tokens you want to swap. The Uniswap interface will route your swap through the version of the protocol with the best price (which might be v2, but could also route through v3 or UniswapX).

![Swapping on v2](//images.ctfassets.net/oc3ca6rftwdu/7bv6lK4V8nIXtFN31mMycP/3000ec04fafac34046ae08008eb524dd/SWAPV2.gif)

# Cheaper to deploy new pools
v2 doesn’t just save users gas on swapping – it is also very gas efficient for users deploying new pools. While v3 offers options for parameterizing pool deployments to optimize capital efficiency, v2 offers full range by default which simplifies the process for creating new pools.

To create new pools on v2, navigate to the [Pools tab](https://app.uniswap.org/pools/v2) of the Uniswap app, where you’re able to Create Pools, Import Pools, or Add Liquidity.

![Add Liquidity on v2](//images.ctfassets.net/oc3ca6rftwdu/3r7yxoZa8FUaGqtLVgYLEa/09367cda4ed78167a9c8a718fadfef18/LIQUIDITYV2.gif)

# Security on every swap
In just the last year, over $55 million has been lost in v2 fork exploits, bugs, and rugs across Binance Smart Chain, Base, and Arbitrum ([Uranium](https://twitter.com/UraniumFinance/status/1387245696454041600), [RocketSwap](https://twitter.com/Cointelegraph/status/1691316548932456448), [LeetSwap](https://twitter.com/TheBlock__/status/1686201265758326784), [Swaprum](https://www.dlnews.com/articles/defi/defi-protocol-swaprum-in-3m-rug-pull-was-certik-audited/?utm_campaign=)). Swapping with official Uniswap v2 contracts directly from the Uniswap Interface provides swappers with a more secure trading environment.

# Live on the Uniswap interface
v2 is now live on Arbitrum, Polygon, Optimism, Base, Binance Smart Chain, and Avalanche. Users can provide liquidity, create pools, and swap on v2 directly from the [Uniswap interface](http://app.uniswap.org).


You all love v2 so much, we’re bringing it to you everywhere. Uniswap v2 is live on Arbitrum, Polygon, Optimism, Base, Binance Smart Chain, and Avalanche.

Uniswap v2 Now Live Across More Major Chains

Over the past few weeks, we’ve rolled out several updates to our web app and mobile app to improve your swap experience. That means more options, better prices, and faster swaps – all on the most trusted Protocol in DeFi. We're excited to share the latest with you.

# Faster swaps
Step one in swapping is getting a quote. We’ve reduced our quote times to a fraction of a second with some back-end caching and parallel processing. With a snappy quote in hand, swappers can submit their transaction with one less click.

![image5](//images.ctfassets.net/oc3ca6rftwdu/LB7jD2RiAh5pUG4eQ6yWd/77222aa5203a4c7ff38e25bc9317bd4e/image5.gif)

# Better fee on transfer token support
Fee on transfer (FoT) tokens take a fee when you swap in, out, or both. Because FoT tokens don’t follow a specific standard, swaps often fail or require higher slippage, which opens them up to frontrunning and sandwich attacks. We’ve built a custom detector on both web and mobile that automatically detects FoT tokens, displays the token fee to swappers, and adjusts slippage to include the fee. All this works to prevent failed transactions and better protect swaps from MEV.

![image4](//images.ctfassets.net/oc3ca6rftwdu/51h1mBn8ILM9sgVV70HP46/e0070ea7016279eb775eedc9e6e720f8/image4.png)

# Swap protection
As an added layer of security, we've added [swap protection](https://support.uniswap.org/hc/en-us/articles/18814993155853-What-is-Swap-Protection-) to the Uniswap app to protect you from people trying to profit from your swaps. Attempts to [frontrun or sandwich](https://support.uniswap.org/hc/en-us/articles/19387081481741-What-is-a-sandwich-attack-) swaps from the Uniswap app can lead to failed transactions or bad prices. Swap protection sends your swaps to a private transaction pool, protecting them from these types of attacks. You can always turn off swap protection in settings.

![image1](//images.ctfassets.net/oc3ca6rftwdu/FIDAYnyfrx9qHQ8Fs5bq4/49c6ee0a1d839549e46b37b6cd6198c3/image1.png)

# Refreshed look
To top off our swap UX changes, we’ve also given our mobile and web swap interface a refreshed look. Swapping is one of the most common onchain actions and our look should be equally simple, intuitive, and safe. Our new design language marries high-contrast colors with a legible typeface to make your swaps look and feel smoother.

![image3](//images.ctfassets.net/oc3ca6rftwdu/2GhAVobeM7ZjzLbUc8kV4h/44f6ede477b7c40bb37a2fa50ec570f6/image3.jpg)

***

We're eager to hear your feedback and refine the Uniswap swap experience. Reach out to us on [Twitter](https://twitter.com/Uniswap) or [Discord](https://discord.gg/FCfyBSbCU5).

We've rolled out updates to our web app and mobile app to improve your swap experience. That means more options, better prices, and faster swaps.

A Better Uniswap(ping) Experience

We're excited to bring Uniswap to everyone's pocket with the release of Uniswap on Android. The Uniswap app first launched on [iOS](https://apps.apple.com/app/apple-store/id6443944476) in April and in less than a month became a top 3 wallet for new downloads. Now, we're bringing a  simpler and safer way to swap on the go to Android users. Download the app [here](https://uniswapwallet.onelink.me/8q3y/2bvxi1lk).

<Video source="//videos.ctfassets.net/oc3ca6rftwdu/2hs3mDgoQhCFPX2B1aRc8i/85744c1bf332b6415da9c18679cc8a4a/Launch_Video.mp4" description="" />

# An app built for swapping on Android
Getting the details right is important to us. Over the past few months, we’ve meticulously adapted Uniswap to Android to match the same swapping experience that millions have on Uniswap.

The Uniswap app is thoughtfully built for the perfect swap: discovering top tokens, automatically switching between Mainnet and L2s, and swapping in a fraction of a second. Over the past few months, we’ve doubled down on what we think makes a great swap. We’ve shipped updates every other week to make swapping faster and added more tokens and chains to swap on.

### Dead simple swaps on L2s
The next wave of user adoption will happen on chains with cheaper and faster transactions. That's why we've made it dead simple to swap on L2s. Swappers don't even need to switch between these chains. Just select a token and the Uniswap app will automatically detect the chain and switch to it. Swap on Polygon, Arbitrum, Optimism, and now **[Base](https://twitter.com/Uniswap/status/1690802620649324544)** and **[BNBChain](https://twitter.com/Uniswap/status/1706655931243835685)** with more to come.

### Protect your swaps
The best swaps are fast and have unbeatable prices. Sometimes, swaps and other onchain activities are subject to [frontrunning and sandwich attacks](https://support.uniswap.org/hc/en-us/articles/19387081481741-What-is-a-sandwich-attack-), which can affect the price you get. That's why we've added [swap protection](https://support.uniswap.org/hc/en-us/articles/18814993155853-What-is-Swap-Protection-) to the Uniswap app. Swaps on the mobile app will now default to a private transaction pool to protect them from MEV and give you better prices.

![image1](//images.ctfassets.net/oc3ca6rftwdu/205yxEzUTKTMYmLV8Wnd1O/67cffccfd539ca18973b22c7795d9e32/image1.png)

### Transparent pricing
There shouldn't be any surprises with swapping. Swaps should be transparent, just like blockchains. Some tokens [take a fee](https://support.uniswap.org/hc/en-us/articles/18673568523789-What-is-a-token-fee-) when you swap in, out, or both. Without a clear token standard, these fees are often hidden and swappers get fewer tokens than they were expecting.

We rolled out an update to automatically spot these tokens and show them in our mobile app and web interface. Just one more way to make swaps simpler.

![image2](//images.ctfassets.net/oc3ca6rftwdu/170waLxZk7QfLgRqyQjqfF/40c66e7b2fab3e8148ec6ec5e16c63b8/image2.png)

# Get started with Uniswap on Android
We're excited to bring the power of Uniswap to Android. Over the past month, thousands of beta testers were instrumental in improving the swap experience. Today, we're releasing our [open-sourced](https://github.com/Uniswap/wallet) and [audited](https://github.com/trailofbits/publications/blob/master/reviews/2023-09-uniswap-wallet-securityreview.pdf) Uniswap app for anyone to download. Head over to the Google Play Store to download the app to swap on the safest and most battle-tested protocol in DeFi.

Check out our Help Center content if you have questions. As always, share your feedback with us on Discord!
* [How to get started with the Android wallet](https://support.uniswap.org/hc/en-us/articles/20317941356429-Get-started-with-the-Uniswap-Android-Wallet)
* [How to create a wallet, import recovery phrases, add new wallets, and more](https://support.uniswap.org/hc/en-us/sections/11302111085709)
* [How to swap, bridge to L2s, connect via WalletConnect, and more](https://support.uniswap.org/hc/en-us/sections/11302165059213)

Uniswap is now on Android. We’re bringing a  simpler and safer way to swap on the go to Android users.

Uniswap on Android

<center>Part 4 of a series on using L2s with the <a href="https://wallet.uniswap.org/">Uniswap app</a></center>

This summer, Ethereum [scaling solutions](https://blog.uniswap.org/uniswap-scaling-summer) have exploded in popularity. After years of research and development, Ethereum has a thriving ecosystem of Layer 2 (L2) networks, applications, and users. The Uniswap Protocol has deployed across several of these L2s, and the Uniswap app currently supports four of them, with more on the way.

We've explored [Arbitrum](https://blog.uniswap.org/scaling-summer-arbitrum), [Optimism](https://blog.uniswap.org/scaling-summer-optimism), and [Polygon](https://blog.uniswap.org/scaling-summer-polygon) in previous posts. Today, we're looking at the Base ecosystem. Base is an L2 rollup incubated by Coinbase and built with the OP Stack, which we covered in our Optimism [blog post](https://blog.uniswap.org/scaling-summer-optimism). Base mainnet opened for everyone last month and already has over [$350](https://defillama.com/chain/Base) million in total value locked and an average of [70,000](https://dune.com/queries/2839431/4741865) daily active addresses. By using a standardized tech stack, Base has made it easy for developers to quickly deploy dapps, like Uniswap, onto Base. In just a [few short weeks](https://twitter.com/Uniswap/status/1688581784609435648), Uniswap has already done [$250 million](https://defillama.com/dexs/chains/base) in volume over [450,000 swaps](https://dune.com/queries/3033876).

Building on top of the OP stack is a big win for the interoperability of the L2 ecosystem. Together with Optimism, Base is working towards the vision of the "Superchain"- a horizontally scalable network of chains that will jointly scale Ethereum. This is the first time a centralized, publicly traded company is launching a permissionless blockchain and will have to navigate the dynamics around centralization, interoperability, and security. While Coinbase is currently supporting and maintaining internal infrastructure to keep Base online in the preliminary phases, Base [aims to gradually decentralize](https://base.mirror.xyz/aBwt4flT1WAKJGQTj2AXBpH_8Qd3umQ-ZECLAJoO_nE).

![image2](//images.ctfassets.net/oc3ca6rftwdu/22XFpzCLUwGmuvW2zIUFDm/cf64e92590347e8d6111fb281a81d34f/image2.png)
<center><a href="https://defillama.com/dexs/uniswap">Daily Uniswap volume on Base</a></center>

Base aims to make "onchain the next online" and onboard the next billion users onchain. Since its mainnet launch, many [leading dapps](https://base.org/ecosystem), as well as unique onchain experiments, have found a home on Base. Among them are:

- [Friend.tech](https://twitter.com/friendtech), one of  the most popular social apps on Base with thousands of daily users
- [BasePaint](https://twitter.com/basepaint_xyz), which was inspired by Reddit's [r/place](https://www.reddit.com/r/place/) game. Each day, hundreds of artists create a single piece together
- [Blackbird](https://twitter.com/blackbird_xyz), a restaurant loyalty platform that unlocks rewards for repeat visitors

Base is a sandbox for new and novel onchain experiments. But to get your hands dirty, you need a wallet. One that makes it easy to connect and start using dapps on Base. At Uniswap Labs, we've built our [self-custodial wallet](https://apps.apple.com/app/apple-store/id6443944476?pt=123625782&ct=Scaling-Summer-Base&mt=8) as a friendly gateway into the Base ecosystem and other L2s. Our fiat on-ramp lets you go directly from your bank to Base without bridging funds. Once in the app, you can seamlessly switch to Base and use WalletConnect to discover your new favorite dapp!

---

*Uniswap is encouraging users to go onchain and explore L2s as part of #ScalingSummer. To join our educational quests, click [here](https://layer3.xyz/quests/swap-on-base-using-uniswap-wallet)*

Learn more about Uniswap's activity on Base as part of our ongoing series on the Uniswap wallet and L2s.

Scaling Summer: Spotlight on Base

<center>Part 3 of a series on using L2s with the <a href="https://wallet.uniswap.org/">Uniswap app</a></center>

This summer, Ethereum [scaling solutions](https://blog.uniswap.org/uniswap-scaling-summer) have exploded in popularity. After years of research and development, Ethereum has a thriving ecosystem of Layer 2 (L2) networks, applications, and users. The Uniswap Protocol is deployed across a number of these L2s and the [Uniswap app](https://wallet.uniswap.org/) currently supports 4 of them, in addition to mainnet, with more coming.

Last month, we dug into [Arbitrum](https://blog.uniswap.org/scaling-summer-arbitrum) and [Optimism](https://blog.uniswap.org/scaling-summer-optimism). Today, we're checking out Polygon. Polygon's original Proof-of-Stake (PoS) chain was launched in 2017 and has over [350,000](https://tokenterminal.com/terminal/metrics/user-dau) daily active users (DAU) transacting over 2 million times every day. This puts Polygon PoS as the most popular scaling solution on Ethereum today.

Uniswap [launched on Polygon PoS](https://twitter.com/Uniswap/status/1473754630173638663) in December 2021 as the fourth chain after Ethereum mainnet, Optimism, and Arbitrum. Uniswap started 2022 with just $2 billion in cumulative trading volume on Polygon PoS and ended with over $28B by the [end](https://twitter.com/0xPolygonLabs/status/1610683710008852481). This year, that number stands at $47.35B, making Uniswap the [leading liquidity protocol](https://defillama.com/dexs/chains/polygon) on Polygon PoS, processing over $215M in trading volume over the past 7 days.

Because swaps cost only [1 cent](https://tokentool.bitbond.com/gas-price/polygon), Polygon PoS is a popular destination for inexpensive onchain activity. The Uniswap app's [fiat-on-ramp](https://blog.uniswap.org/web-fiat-on-ramp) makes it easier for swappers to fund their [wallets](https://wallet.uniswap.org/) directly on Polygon PoS.

![image1](//images.ctfassets.net/oc3ca6rftwdu/7gdTKzhf73Rspxq1cO9v6h/ebef7afdd30c364210e8c6f3ad399023/image1.png)
<center><a href="https://defillama.com/dexs/uniswap">Daily Uniswap volume on Polygon</a></center>

Most L2 networks focus on a single chain but Polygon refers to a family of interconnected chains that address specific needs within the broader Ethereum ecosystem. Polygon PoS is the most popular chain, but there is also [Polygon Miden](https://polygon.technology/polygon-miden) and [Polygon zkEVM](https://polygon.technology/polygon-zkevm). Both are zero-knowledge (ZK) rollups that use cryptography to secure transactions as opposed to Optimism, Arbitrum, and Base, which use crypto-economic incentives. In general, ZK rollups offer greater security guarantees and much faster finality than optimistic rollups, though their increased complexity requires careful development and powerful hardware.

A few months ago, Polygon announced its plans for [Polygon 2.0](https://polygon.technology/roadmap) to unify Polygon PoS, zkEVM, and Miden with ZK technology. This will be the first experiment of its kind in crypto and a major undertaking to navigate challenges around centralization, interoperability, and security.

Multi-chain ecosystems are difficult to navigate; users have to fiat onramp, bridge between networks, and manage their funds. A successful migration to Polygon 2.0 would ease many of the UX problems that Polygon users currently face, but users still need a feature-rich app to interact onchain. At Uniswap Labs, we've built our [self-custodial wallet](https://apps.apple.com/app/apple-store/id6443944476?pt=123625782&ct=Scaling-Summer-Polygon&mt=8) as a friendly gateway into the Polygon ecosystem and other L2s with a direct fiat-on-ramp, seamless switching between mainnet and L2s, and WalletConnect for any app on Polygon.

---

*Uniswap is encouraging users to go onchain and explore L2s as part of #ScalingSummer. To join our educational quests, click [here](https://layer3.xyz/quests/swap-on-polygon-using-uniswap-wallet).*

Learn more about Uniswap's activity on Polygon as part of our ongoing series on the Uniswap wallet and L2s.

Scaling Summer: Spotlight on Polygon

<center>Part 2 of a series on using L2s with the <a href="https://wallet.uniswap.org/">Uniswap app</a></center>

This summer, Ethereum [scaling solutions](https://blog.uniswap.org/uniswap-scaling-summer) have exploded in popularity. After years of research and development, Ethereum has a thriving ecosystem of Layer 2 (L2) networks, applications, and users. The Uniswap Protocol is deployed across a number of these L2 and the [Uniswap app](https://wallet.uniswap.org/) currently supports 4 of them, in addition to mainnet, with more coming.

A few weeks ago, we dug into the [Arbitrum](https://blog.uniswap.org/scaling-summer-arbitrum) with the Uniswap app. Today, we're checking out Optimism. Optimism Mainnet is an Optimistic rollup with over [100,000](https://dune.com/queries/469990/890729) daily active users (DAU) transacting over [600,000](https://dune.com/queries/347720/662079) times every day. Many of these DAUs are active in the DeFi and NFT ecosystems -- not just on Uniswap, but on projects like Synthetix and Zora.

Before Optimism was ready for mainnet, Uniswap worked with their team in 2019 (then called the Plasma Group), on a project called [Unipig](https://twitter.com/unipigexchange) -- a custom-built rollup for Uniswap that highlighted the UX benefits of L2s. Unipig was an optimistic rollup experiment designed to speed up L2 development with a proof-of-concept of a lightning-fast and cheap dapp on a rollup. Unipig was successful in showing what the future of UX could be. Two years later, Uniswap [launched](https://blog.uniswap.org/uniswap-optimism-alpha) on Optimism Mainnet.

Uniswap is now the [leading liquidity protocol](https://defillama.com/dexs/chains/optimism) on Optimism, processing over 75% of all swapping volume in the past 7 days at $128M. These swaps are [5-10%](https://www.growthepie.xyz/fundamentals/transaction-costs) of the cost of mainnet swaps, making Optimism a popular destination for inexpensive onchain activity. The Uniswap app makes it easy for swappers to fund their wallets directly on Optimism with our fiat-on-ramp.

![image1](//images.ctfassets.net/oc3ca6rftwdu/3HlrbvTjmmZuhiZWx0KYBv/1e8e548b629a4201f17ad2e4595e242e/image1.png)
<center><a href="https://defillama.com/dexs/uniswap">Daily Uniswap volume on Optimism</a></center>

Optimism Mainnet is built using the [OP Stack](https://stack.optimism.io/), a combination of open-source technologies that power the Optimism mainnet. Developers can use the OP Stack to securely create new L2 blockchains that are interoperable with any other blockchains deployed with the OP Stack. This is Optimism's future vision of the [Superchain](https://app.optimism.io/superchain), a horizontally scalable network of chains that share security, a communication layer, and an open-source development stack.

The Superchain is Optimism's solution to an increasingly fragmented L2 ecosystem. The OP Stack standardizes L2s, making it easier to communicate across them. This standardization has downstream benefits too. Apps that are deployed on Optimism can quickly deploy onto any OP Stack chain. For example, Coinbase's Base chain was [built](https://base.mirror.xyz/H_KPwV31M7OJT-THUnU7wYjOF16Sy7aWvaEr5cgHi8I) using the OP Stack. Because Uniswap was already on Optimism, which used the OP Stack, we could quickly [deploy](https://twitter.com/Uniswap/status/1688581784609435648) on Base. This quick deployment meant swappers could reliably swap on a battle-tested and efficient market, making Uniswap the number one [liquidity protocol](https://defillama.com/dexs/chains/base) on Base.

Of course, this tech -- like much of web3 -- is still evolving. Centralized operations that create a better UX face questions about decentralization. Bridging technologies on every L2 face security risks that are still being addressed. And while more experimentation can lead to better outcomes, it also risks ecosystem fragmentation. But across all of DeFi, we must continue to iterate to improve the experience for both new and long-time users.

---

*Uniswap is encouraging users to go onchain and explore L2s as part of #ScalingSummer. To join our educational quests, click [here](https://layer3.xyz/quests/swap-on-optimism-using-uniswap-wallet).*

Learn more about Uniswap's activity on Optimism as part of our ongoing series on the Uniswap wallet and L2s.

Scaling Summer: Spotlight on Optimism

<center>Part 1 of a series on using L2s with the <a href="https://wallet.uniswap.org/">Uniswap app</a></center>

Scalability is an important property of blockchains. It measures how many transactions a blockchain can process, how quickly, and how cheaply. You've likely experienced scaling limitations --- paying high gas fees or waiting for your swap to execute.

Years of hard work researching different scaling solutions have laid the foundation for a thriving ecosystem of applications, users, and activity on these networks. This summer, Ethereum scaling solutions have exploded in popularity and usage. After years of research and development, Ethereum has a thriving ecosystem of Layer 2 (L2) networks, applications, and users.

The Uniswap Protocol is deployed across a variety of different chains and the [Uniswap app](https://wallet.uniswap.org/) currently supports 4 chains in addition to mainnet with more coming. Today we're going to dig into Arbitrum -- which was launched in 2021 by the Offchain Labs team and was the first L2 to deploy the Uniswap Protocol.

Uniswap is the [leading liquidity protocol](https://defillama.com/dexs/chains/arbitrum) on Arbitrum, processing over 50% of all swapping volume in the past 7 days at $675M. These swaps can be up to 22x [cheaper](https://l2fees.info/) on Arbitrum than mainnet, making Arbitrum a popular destination for inexpensive onchain activity. The Uniswap app makes it easy for swappers to fund their wallets directly on Arbitrum with our fiat-on-ramp.

![image1](//images.ctfassets.net/oc3ca6rftwdu/2lSlQeLwWVC6s3z7V2RYHb/783c03249c87b5d58e3a02940ff835df/image1.png)
<center><a href="https://defillama.com/dexs/uniswap">Daily Uniswap volume on Arbitrum</a></center>

[Arbitrum One](https://portal.arbitrum.io/?chains=arbitrum-one) is an Optimistic rollup and is the Arbitrum crypto ecosystem's flagship chain with over [150,000 daily active users](https://tokenterminal.com/terminal/projects/arbitrum) (DAUs) -- a 5x increase between 2022 and 2023. It derives its execution finality from the Ethereum mainnet by posting data to the Ethereum mainnet. This data is used to verify that the transactions on Arbitrum have been processed correctly.

Offchain Labs has also shipped [Arbitrum Nova](https://portal.arbitrum.io/?chains=arbitrum-nova), the first AnyTrust chain on mainnet that shares the same codebase as Arbitrum One, but does not rely on Ethereum for execution finality and allows for higher throughput and lower transaction fees. This makes it a powerful technology for social and gaming use cases. [Arbitrum Orbit](https://arbitrum.foundation/orbit) is a permissionless solution to deploy a fully customized Layer 3 chain that settles to one of Arbitrum's public L2 chains, like Arbitrum One or Nova.

While Arbitrum has seen significant user growth, it's still far less than the[ 313,000 DAUs on mainnet](https://tokenterminal.com/terminal/projects/ethereum) -- underscoring one of the biggest hurdles facing Arbitrum and all L2s is adoption. To help developers to integrate with L2s on the back end, the Offchain Labs team is working on [Stylus](https://offchain.medium.com/hello-stylus-6b18fecc3a22) to let developers deploy programs in their preferred languages, like Rust, C, and C++, alongside Solidity on Arbitrum.

But the backend is only half the battle. We need a better UX, like the Uniswap app. The app's's fiat-on-ramp will onboard new users directly to various L2s including Arbitrum, skipping the confusing process of onramping to a CEX and then bridging to Arbitrum. Once they're on Arbitrum, the Uniswap app's WalletConnect feature will let them connect and swap on Arbitrum without having to switch networks. With the [Uniswap app](https://wallet.uniswap.org/), users have the perfect tool to explore the Arbitrum ecosystem.

---

*Uniswap is encouraging users to go onchain and explore L2s as part of #ScalingSummer. To join our educational quests, click [here](https://twitter.com/Uniswap/status/1691175948186701824).*

Learn more about Uniswap activity on Arbitrum as part of our ongoing series on the Uniswap wallet and L2s.

Scaling Summer: Spotlight on Arbitrum

Ethereum's scaling solutions have captured everyone's attention this summer. Optimism's Bedrock update lays the groundwork for custom scaling networks. Polygon 2.0 unifies all Polygon protocols. The Boojum upgrade lowers the hardware barrier to help secure zkSync. And, of course, Base launched! Around the world, developers, hackers, and researchers are pouring hundreds of hours into the same problem: What's the best way to scale Ethereum?

Projects and developers are preparing crypto for the next wave of user adoption. Now that we have cheap transactions and the speed to compete with traditional financial rails, the crypto-curious will spend more time on Optimism, Arbitrum, Base, and Polygon than Ethereum itself.

For the next few weeks, we'll explore each of these chains, including some onchain activities and prizes. We'll learn about the technology, popular applications, and community using the [Uniswap app.](https://wallet.uniswap.org/)

# How scaling solutions help Ethereum
Scalability is an important property of blockchains. It measures how many transactions a blockchain can process, how quickly, and how cheaply. You've likely experienced scaling limitations --- paying high gas fees or waiting for your swap to execute.

Years of hard work researching different [scaling solutions](https://ethereum.org/en/developers/docs/scaling/) have laid the foundation for a thriving ecosystem of applications, users, and activity on these networks. Together, Ethereum scaling solutions have made the crypto UX much [cheaper](https://l2fees.info/) and [faster](https://l2beat.com/scaling/activity), processing hundreds of millions in [daily volume](https://defillama.com/chains).

Currently, most scaling solutions are implemented as [rollups](https://www.coindesk.com/learn/what-are-rollups-zk-rollups-and-optimistic-rollups-explained/). These rollups increase transaction throughput by producing faster blocks, bundling these transactions, and then sharing them with the Ethereum mainnet -- all while sharing Ethereum's security properties.

You can think of rollups like opening a tab. Instead of paying for items you order individually, you can bundle your purchases and pay for them all at once when you close out your tab. A rollup is like a tab. It bundles multiple transactions at once. When it's time to close out, you settle your bill with the restaurant's payment processor, just like rollups settle their transactions on the Ethereum network. Optimism, Arbitrum, Base, and Polygon 2.0 are examples of rollups.

# Exploring Polygon, Optimism, Base, and Arbitrum
Scaling solutions are a key part of Ethereum's [future](https://ethereum-magicians.org/t/a-rollup-centric-ethereum-roadmap/4698). Getting familiar with them will upskill your onchain experience --- and we can help. This summer, we'll deep dive into Arbitrum, Polygon, Base, and Optimism and partner with these projects to help you better understand and navigate this space. We'll see how easy it is to use the Uniswap app and play with these scaling networks at low costs with the simplicity you've come to expect from Uniswap.

To get started, download the [Uniswap app](https://wallet.uniswap.org/) and follow us on [Twitter](https://twitter.com/uniswap) for more updates!

It’s Scaling Summer at Uniswap. Join us as we go onchain with Polygon, Arbitrumn, Optimism, and Base.

What Scaling Ethereum Means For you

*By [Sara Reynolds](https://twitter.com/saraareynolds) and [Zach Pomerantz](https://github.com/zzmp)*

A safe swapping experience must balance security and speed. Token approvals are a great example of this tradeoff. Self-custody lets users specify who has permission to move funds from their wallets, but sending a token approval transaction takes time and costs gas. To improve this process and lower the number of clicks to swap, we released the [Permit2](https://github.com/Uniswap/permit2/) smart contract [last year](https://blog.uniswap.org/permit2-and-universal-router).

Instead of signing a token approval for each new smart contract, Permit2 allows token approvals to be shared and managed across different contracts, creating a more unified, cost-efficient, and safer UX. Permit2 is already improving Uniswap's product UX, but it was designed for anyone to use.

This guide will show you how. In it, we will:

- Set up a sample demo contract to call the `AllowanceTransfer` function
- Use Permit2 to permit and transfer funds
- Construct Permit2 signatures on a frontend using the Permit2 SDK

![image2](//images.ctfassets.net/oc3ca6rftwdu/WEj84srnjtuCZaBvyw9hm/c5db1ef9f5a1c86018d972542805404a/image2.png)

# What can Permit2 do
Permit2 is a token approval contract that iterates on existing token approval mechanisms by introducing signature-based approvals and transfers for any ERC20 token, regardless of [EIP-2612](https://eips.ethereum.org/EIPS/eip-2612) support.

For each token, users have to submit a one-time traditional approval that sets Permit2 as an approved spender. Contracts that integrate with Permit2 can "borrow" the spender status for any token a user has approved on the canonical [Permit2 contract](https://etherscan.io/address/0x000000000022D473030F116dDEE9F6B43aC78BA3). Any integrated contract can temporarily become a spender with a signed offchain Permit2 message. This effectively "shares" the one-time traditional token approval and skips the individual approval transaction for every protocol that supports Permit2 -- until the Permit2 message expires. It's a major UX upgrade with additional safety bumpers like expiring approvals and the lockdown [feature](https://github.com/Uniswap/permit2/#features).

![image1](//images.ctfassets.net/oc3ca6rftwdu/4SCDyYzjU6dzde1vaVxm5i/fb9205624a14ba86f21809f244ee210f/image1.jpg)

Permit2's design gives us a few helpful features. The full list of features can be found in our [readme](https://github.com/Uniswap/permit2/tree/main), but notably:

1. **Permits for any token**. Applications can have a single transaction flow by sending a signature along with the transaction data for any token, including those not supporting a native `permit` method.
2. **Expiring approvals**. Approvals can be time-bound, removing security concerns around hanging approvals on a wallet's entire token balance. Revoking approvals do not necessarily have to be a new transaction.
3. **Signature-based transfers**. Users can bypass setting allowances entirely by releasing tokens to a permissioned spender through a one-time signature.
4. **Batch approvals and transfers**. Users can set approvals on multiple tokens or execute multiple transfers with one transaction.
5. **Batch revoking allowances**. Remove allowances on any number of tokens and spenders in one transaction.

Permit2 benefits greatly from network effects. As more teams integrate with Permit2, we'll begin to see network effects. So how do we do it?

# How to accept Permit2 signatures in your contract
For app developers, Permit2 is an incredibly useful way to create a simpler, less expensive, and safer UX that your users will appreciate. In this guide, we’ll write a contract that integrates with Permit2 to make use of this new meta-transaction approval system.

### AllowanceTransfer
The `AllowanceTransfer` [contract](https://github.com/Uniswap/permit2/blob/main/src/AllowanceTransfer.sol) shares and manages approvals with other spenders using a time-bounded expiry. It's functionally similar to traditional token approvals, handling allowances, transfers, and approval expiries. This style of approval works best if your application needs to access and transfer tokens frequently. With allowance transfer style approvals, an approved amount and expiry are set and saved in storage for each permitted spender. This allows the spender to transfer tokens as needed up until the spending limit is reached or until the approval expires.

### SignatureTransfer
The `SignatureTransfer` [contract](https://github.com/Uniswap/permit2/blob/main/src/SignatureTransfer.sol) introduces one-time permits for token transfers. Spenders are permitted to transfer tokens, but only in the same transaction where the signature is spent. To transfer funds again, you would need to request this signature again. The signature transfer method is great for applications that infrequently need tokens from users and want to ensure tighter restrictions on approvals. Persistent limits and expiries are not stored and never leave "hanging approvals." SignatureTransfer also lets you do a more advanced integration with Permit2 through permitWitnessTransferFrom, which we plan to detail in a later blog post.

Depending on the type of approval you need for your application, your contract will need to call one of these functions --- though these are not the only callable functions in Permit2:

- [permit](https://github.com/Uniswap/permit2/blob/main/src/AllowanceTransfer.sol#LL33C15-L33C15)
- [permitTransferFrom](https://github.com/Uniswap/permit2/blob/main/src/SignatureTransfer.sol#L22)
- [permitWitnessTransferFrom](https://github.com/Uniswap/permit2/blob/main/src/SignatureTransfer.sol#L32)

## Setting up your contract
In this example, we'll write a contract to use the allowance transfer style approval on Permit2. We'll assume that a user has already set a token approval to let Permit2 be a spender.

Since the `permit` entrypoint we want lives in the `AllowanceTransfer` contract, we'll first create our `Demo` contract to use the `IAllowanceTransfer` [interface](https://github.com/Uniswap/permit2/blob/main/src/interfaces/IAllowanceTransfer.sol) exposed in Permit2. In your constructor, you can pass the [Permit2 address](https://etherscan.io/address/0x000000000022D473030F116dDEE9F6B43aC78BA3) and save it as an immutable value. Permit2 is deployed to the [same address](https://etherscan.io/address/0x000000000022D473030F116dDEE9F6B43aC78BA3) across mainnet, Ethereum, Optimism, Arbitrum, Polygon, and Celo.

```solidity
import {IAllowanceTransfer} from "Permit2/src/interfaces/IAllowanceTransfer.sol";

   contract Demo {
   IAllowanceTransfer public immutable permit2;

   constructor(address _permit2) {
       permit2 = IAllowanceTransfer(_permit2);
   }
}
```

## Calling permit
Now that you've initialized with the canonical Permit2 contract, your contract can set an approval by calling `permit`. This `permit` [function](https://github.com/Uniswap/permit2/blob/main/src/AllowanceTransfer.sol#L33) has a few parameters.

```solidity
function permit(address owner, IAllowanceTransfer.PermitSingle memory permitSingle, bytes calldata signature) external
```

To call `permit` we need the owner's address, their signature, and the `PermitSingle` information. [PermitSingle](https://github.com/Uniswap/permit2/blob/main/src/interfaces/IAllowanceTransfer.sol#L57) is a struct that holds the `permit` information that has been signed by the user. Before Permit2 can let our demo contract be a spender, it has to verify the user with their signature and `PermitSingle` data.

To call `permit`, we can create a `permitThroughPermit2` function that will pass these parameters through. Later on, we will see how the application frontend requests and constructs the `PermitSingle`.

```solidity
   function permitThroughPermit2(PermitSingle calldata permitSingle, bytes calldata signature) public {
       permit2.permit(msg.sender, permitSingle, signature);
   }
```

By passing `msg.sender` for the `owner` variable, we’re requiring that the caller of the function is also the one who signed the `PermitSingle` information. That’s one less parameter we need to collect for `permitThroughPermit2`.

Before we allow a contract to transfer a user’s tokens using the Permit2 approvals, we need to check that our demo contract is set to be spender. This checks if a user has called this function. If so, then we know we have spending permissions on our contract. We can add a custom error, `InvalidSpender`, and write a check that enforces that signatures passed through `permitThroughtPermit2` construct our demo contract address as the spender.

Our function now looks something like this:

```solidity
   function permitThroughPermit2(PermitSingle calldata permitSingle, bytes calldata signature) public {
       if (permitSingle.spender != address(this)) revert InvalidSpender();
       permit2.permit(msg.sender, permitSingle, signature);
   }
```

## Transferring tokens
Permit2 uses a persistent mapping based design. This design stores token approvals information set by the user like the spender, amount, and expiration. Because this information is stored, this approval will last until the `permitSingle.permitDetails.expiration`. Until that timestamp, our demo contract can transfer the funds up to the allowance. Let’s write another function to send funds to this contract by calling the `transferFrom` [function](https://github.com/Uniswap/permit2/blob/main/src/AllowanceTransfer.sol#L59) in Permit2.

```solidity
function transferToMe(address token, uint160 amount) public {
       permit2.transferFrom(msg.sender, address(this), amount, token);
	// ...Do cool stuff ...
   }
```

By passing in `msg.sender`, we ensure that only the approved user can trigger this function to send some amount of a desired token from the sender to the demo contract. If this was instead a parameter that we pass in, then anyone could trigger the function pulling the funds from the user. After calling this function, our demo contract now has tokens that they can swap, deposit into a lending protocol, or do anything else with.

You may have noticed that `permit` and `transferFrom` are two separate entry points in our contract. If left like this, it would mean that the user has to initiate two transactions to get their tokens with any contract that is integrated with Permit2. We can instead combine the `permit` and `transferFrom` calls into one entrypoint:

```solidity
   function permitAndTransferToMe(IAllowanceTransfer.PermitSingle calldata permitSingle, bytes calldata signature, uint160 amount) public {

       if (permitSingle.spender != address(this)) revert InvalidSpender();
       permit2.permit(msg.sender, permitSingle, signature);
       permit2.transferFrom(msg.sender, address(this), amount, permitSingle.details.token);
       //...Do cooler stuff ...
   }
```

If our demo contract is approved through a `permit` for longer than a single transaction, we do not need to pass in a signature each time to call `transferFrom` and pull tokens.

We used `AllowanceTransfer` as our entrypoint. `SignatureAllowance` lets us do the same thing, but the approval would not last beyond the single transaction. We could use the  `permitTransferFrom` and `permitWitnessTransferFrom` functions to ensure even tighter restrictions at the expense of greater transaction costs.

# How to construct Permit2 signatures on the frontend
To integrate Permit2 on the frontend we will be using the [Permit2 SDK](https://github.com/Uniswap/permit2-sdk). We'll be calling into our demo contract, using `permitAndTransferToMe`.

First, in order to get the signature for a `PermitSingle`, you'll need the next valid nonce, which you can get using the SDK.

```javascript
import { AllowanceProvider, PERMIT2_ADDRESS } from '@uniswap/Permit2-sdk'

const allowanceProvider = new AllowanceProvider(ethersProvider, PERMIT2_ADDRESS)
const { amount: permitAmount, expiration, nonce } = allowanceProvider.getAllowanceData(user, token, ROUTER_ADDRESS);

// You may also check amount/expiration here to see if you are already permitted -
// you may not need to generate a new signature.
```

Once you have that, you can construct the `PermitSingle` object which we’ll need to pass as our first parameter. This object is defined by the SDK as a typed interface to ensure it matches the contract’s struct. To construct it, we’ll need a few things:
- The address of the token
- The maximum amount of the token that will be permitted to be transferred
- The deadline after which the `permit` will no longer be valid. At Uniswap Labs, we use 30 days.
- The address of the spender that will be permitted to transfer funds on behalf of the user

These are the same input variables that our demo contract sends to the Permit2 contract.

```javascript
import { MaxAllowanceTransferAmount, PermitSingle } from '@uniswap/Permit2-sdk'

const PERMIT_EXPIRATION = ms`30d`
const PERMIT_SIG_EXPIRATION = ms`30m`

/**
* Converts an expiration (in milliseconds) to a deadline (in seconds) suitable for the EVM.
* Permit2 expresses expirations as deadlines, but JavaScript usually uses milliseconds,
* so this is provided as a convenience function.
*/
function toDeadline(expiration: number): number {
return Math.floor((Date.now() + expiration) / 1000)
}

const permitSingle: PermitSingle = {
details: {
token: tokenAddress,
amount: MaxAllowanceTransferAmount,
// You may set your own deadline - we use 30 days.
expiration: toDeadline(/* 30 days= */ 1000 * 60 * 60 * 24 * 30),
nonce,
},
spender: spenderAddress,
// You may set your own deadline - we use 30 minutes.
sigDeadline: toDeadline(/* 30 minutes= */ 1000 * 60 * 60 * 30),
}
```

Now that you have your `PermitSingle` object you can pass it to the SDK to get back [typed data](https://eips.ethereum.org/EIPS/eip-712#definition-of-typed-structured-data-%F0%9D%95%8A) for the user to sign, using `AllowanceTransfer.getPermitData`. This takes the `PermitSingle`, the address off the Permit2 contract on the chain, and the chain ID and returns typed data that you can pass directly to a library like `ethers` to request the user's signature.

```javascript
import { AllowanceTransfer, PERMIT2_ADDRESS } from '@uniswap/Permit2-sdk'

const { domain, types, values } = AllowanceTransfer.getPermitData(permitSingle, PERMIT2_ADDRESS, chainId)

// We use an ethers signer to sign this data:
const signature = await provider.getSigner().signTypedData(domain, types, value)

// This assumes ethers@6. Our web app uses ethers@5, and we've run into a few cross-wallet compatibility issues, so we actually sign using a helper method: https://github.com/Uniswap/conedison/blob/6fdf4baf13a799ca6d37f6d3222f9194e1750007/src/provider/signing.ts#L32.
```

You should get a `signature` back from `ethers`, which you can pass onto other methods which use it. For another example, check out how we [pass ours to the Universal Router](https://github.com/Uniswap/interface/blob/ec547ab100f793d127246186d5fd60786758a862/src/hooks/useUniversalRouter.ts#L63-L67).

Finally, we'll instantiate our contract using `ethers`, and use it to call `permitAndTransferToMe`.

```javascript
import { Contract } from ‘ethers’

// We only need to provide the ABI that we will use.
const demoAbi = [
‘function permitAndTransferToMe(PermitSingle calldata permitSingle, bytes calldata signature, uint160 amount)’,
]
const demoContract = new Contract(demoContractAddress, demoAbi, provider.getSigner())

await demoContract.permitAndTransferToMe(permitSingle, signature, amount)
```

# Conclusion
You made it to the end! While it may initially seem daunting, we hope this blog makes it easier. And remember to check out the [Permit2 code](https://github.com/Uniswap/permit2), our [SDK](https://github.com/uniswap/permit2-sdk), and [docs](https://docs.uniswap.org/contracts/permit2/overview) for more.

This guide will show you how to call the AllowanceTransfer function using Permit2 and construct a signature on a front end using the Permit2 SDK.

How to Integrate with Permit2

A few weeks ago, we [announced](https://blog.uniswap.org/uniswap-mobile-wallet-early-access) the Uniswap [mobile app](https://wallet.uniswap.org/) --- the safest and simplest self-custody wallet in Web3 on iOS and Android. The Uniswap wallet has [grown](https://twitter.com/haydenzadams/status/1653807959024054277) to tens of thousands of swappers as a top wallet in the iOS app store. Feedback has been overwhelmingly positive as people appreciate the friendly design, security, and swap UI.

You need a wallet to do just about anything onchain --- [swap](https://app.uniswap.org/#/swap), [buy NFTs](https://blog.uniswap.org/uniswap-nft-aggregator-announcement), and [purchase crypto](https://blog.uniswap.org/web-fiat-on-ramp). So we wanted to share a few reasons why you'll love using the Uniswap wallet to trade tokens, collect NFTs, and navigate Web3.

# 1. The best swap experience
When it comes to swapping, Uniswap is the [gold standard](https://twitter.com/dhadrien_/status/1646617605124558848). The mobile app brings our swap experience to a native mobile app that feels fast and fresh.

You can trade any token available on Uniswap across multiple chains: Ethereum, Polygon, Optimism, Arbitrum. To trade on an L2 network, simply select an L2 token and the swap form will instantly fetch a quote on that network. The app will authorize the transaction using Face ID or Touch ID and then, once the swap settles onchain, you’ll receive a real-time push notification for the completed swap.

<Video source="//videos.ctfassets.net/oc3ca6rftwdu/62Bv8LZVhW3Dadb9lsQFet/aa60908e17e8f6592bb14743fe4036bc/Swapping_-_Compressed.mp4" description="Swapping on the Uniswap mobile app." />

# 2. Search Web3
You can search for any token, NFT collection, ENS name, or wallet address. It’s the easiest way to discover new wallets and assets. 

Token search displays important information like swapping volume, market cap, and historical price activity. NFT search reveals floor prices, trading volume, and collection details to help you find the perfect NFT. Search lets you explore the activity and assets of another wallet. 

When you find yourself frequently checking a token or wallet, you can favorite it for easy access. The Uniswap mobile app is a great tool for exploring Web3 on the go.

![image2](//images.ctfassets.net/oc3ca6rftwdu/36vXUIcKh3uM8J9knxf9OS/ae99567fd83c01ed2b694785f56a00da/image2.png)

# 3. Explore NFT collections
Uniswap mobile app is the best way to find the perfect NFT.

Not only can you search for NFTs – you can browse every item in a collection. You’ll find the artwork, floor price, and 24hr volume on the collection page. If an NFT catches your eye, you can click in to see the last sale price and current owner. From there you can hop into the owner’s profile to see what other NFTs they own. 

![Untitled (1) (1)](//images.ctfassets.net/oc3ca6rftwdu/7yFDPDhfTiaWH6IPnj5w4H/28a2c42102fa3cf7a6cf06a6ec2ea6cd/Untitled__1___1_.png)

# 4. WalletConnect to multiple apps simultaneously
WalletConnect allows you to connect with other web3 apps in a browser. What makes the Uniswap app unique is that you can connect to multiple apps on different chains at the same time.

In other words, you can use Lido on Ethereum mainnet, Aave on Polygon, and Uniswap on Arbitrum without switching between networks or disconnecting. If you want to disconnect, you can manage all your app connections in the settings page.

<Video source="//videos.ctfassets.net/oc3ca6rftwdu/5Q8IdS7WOFBvu5EybDfbSy/6161d2459cebd18b612bf121c2980879/WalletConnect_Compressed.mp4" description="WalletConnect in the Uniswap app." />

# 5. Spam filtering and safety warnings
There are a lot of tokens out there, but they're not equally reputable or safe. The Uniswap app protects you through spam filters and safety warnings.

By default, Uniswap app applies a spam filter to 'hide' unknown tokens in your portfolio. This is useful to declutter spam airdrops that you didn't purchase and let you focus on the tokens you chose to buy. Don't worry though, you're still in full control and can see every token in your wallet, including spam,  in the 'Hidden' section. You can un-hide those tokens by turning off the 'Unknown tokens' toggle in Settings.

Token [warning labels](https://support.uniswap.org/hc/en-us/articles/8723118437133-What-are-token-warnings-) also help you make safe and informed decisions while trading or browsing tokens. The Uniswap app will label lesser-known tokens with a yellow or red label when appropriate. This is a sign for you to research before trading a token.

***

These five features are just the tip of the iceberg that is the Uniswap mobile app. There's so much left to discover, like the fiat onramp, iCloud backup, [open source repo](https://github.com/Uniswap/wallet), and more.

Get Uniswap in your pocket by downloading it from the [app store](https://apps.apple.com/app/apple-store/id6443944476?pt=123625782&ct=Announcement%20Blog&mt=8), and share your feedback on [Discord](https://discord.gg/FCfyBSbCU5).

People love the Uniswap app. Learn about their favorite features, from the smooth swap experience to NFT collections.

Five Reasons You’ll Love the Uniswap Mobile App


The Uniswap Labs iconic swap page is the first time DeFi "clicks" for many users. [Hundreds of thousands](https://dune.com/wanxin/Uniswap-Interface-Stats/ac7f952e-a755-43ea-b193-1605cdaf4655) of users swap using the Uniswap marketplace weekly, knowing they'll get the assets they're looking for at the right price with swaps that just work.

Recently, we brought our simple and safe swap experience to the [Uniswap mobile app](https://blog.uniswap.org/uniswap-mobile-wallet-release). Try it out yourself on [iOS and Android](https://wallet.uniswap.org/).

Turning the complexities of the Uniswap Protocol into a one-click marketplace for swapping and LPing is no small task. Behind the scenes, Uniswap Labs has built Web3's most popular application to create a simpler and safer experience. Let's see how.

# Swapping with the Uniswap marketplace

## The best swap experience
A well-designed product communicates its purpose at a glance. When it comes to swapping, Uniswap is the gold standard. Our design philosophy is to take the complexities of DeFi and distill them into a simplified user experience.

Our swap experience became so distinctive that we turned it into a [widget](https://blog.uniswap.org/widget) so anyone could embed the Uniswap UI into their app. Since we released it in 2022, the Uniswap Widget has been integrated into major applications like OpenSea, FWB, and others.

![Widget](//images.ctfassets.net/oc3ca6rftwdu/1C8QV88tHwJKzWUYPSfYaL/603320a7bfdc43a5ec8477eed8a6d28e/Widget.gif)

Our swap page includes additional features like the multi-chain network switcher so users can quickly navigate Ethereum, Polygon, Optimism, Arbitrum, and other popular chains. Our recently launched [mini portfolio](https://twitter.com/Uniswap/status/1638579346351824911) lets users see their tokens, NFTs, onchain activity, manage LP positions, and even purchase crypto. Users can now see their portfolio and swap side-by-side, giving them an information-rich experience when they swap!

![MiniPortfolio](//images.ctfassets.net/oc3ca6rftwdu/4WgpbWZIKuF0pliLXl8jAy/aa409bca470820582a05479fd467c55d/MiniPortfolio.jpeg)

## Competitive prices with auto router
Beyond just a sleek design, users get great prices on the Uniswap marketplace. Liquidity in the Uniswap Protocol is split into different pools across v2 and v3. The best price for a swap may not come from one individual pool but from taking bits and pieces from multiple pools.

The Uniswap Labs [auto router](https://blog.uniswap.org/auto-router-v2) finds the best prices by comparing trade routes across v2 and v3 and even accounts for gas to get you the most efficient trade possible.

![Router](//images.ctfassets.net/oc3ca6rftwdu/3ZBAmKSUlJbzI6kDi9cMoe/bf1637bdeffdcfd109a01323a417d85c/Router.jpeg)

## Safe slippage
Most users never encounter [price slippage](https://support.uniswap.org/hc/en-us/articles/8643879653261-What-is-Price-Slippage), but we still have a few safety rails to protect users from lopsided trades, or whether the swap executes at all.

Price slippage is the difference between the price users expect to receive after swapping and what they actually receive based on the total movement of the market after a trade. We automatically calculate the slippage percentage depending on the trade size and gas cost.

If your trade goes through, we can guarantee a minimum number of tokens. If your trade exceeds the slippage percentage, your transaction will automatically fail as a failsafe. For smaller trades, we'll adjust slippage tolerance to improve the chances of the transaction succeeding.

![Slippage](//images.ctfassets.net/oc3ca6rftwdu/5kVFLSGLPr5ZY3GLosXoL/750c57b99ec92be5873c96c6c5cf1419/Slippage.png)

## Token info
The Uniswap Protocol is a permissionless set of smart contracts. Anyone can create a pool with any token. This supports the "long tail" of tokens and explains why the Uniswap Protocol has thousands of tokens to trade.

To contextualize these tokens, each one has its own [token details page](https://app.uniswap.org/#/tokens/ethereum/NATIVE). Each page gives a high-level snapshot with price charts, trading stats, project details, and the ability to swap right there.

As an added layer of security, we've included safety labels for each token to help users understand the risk profile of each token. While these warnings do not endorse or criticize any particular token, they help users make sense of them. You can find the criteria for token warnings in our [Help Center](https://support.uniswap.org/hc/en-us/articles/8723118437133-What-are-token-warnings).

## Secure approvals with Permit2
Every smart contract interaction, like swapping, requires users to approve tokens from their wallets. Uniswap Labs developed [Permit2](https://blog.uniswap.org/permit2-and-universal-router) to share these approvals across applications, so you only need to approve once.

Unifying permissions for any token across multiple applications is a major safety improvement for our users. Permit2 has many other safety and UX [features](https://github.com/Uniswap/permit2) like expiring approvals instead of hanging approvals on a wallet's entire token balance, and batch approvals, transfers, and revokes to reduce the number of clicks each user has to perform.

# Proving liquidity with the Uniswap marketplace
Swapping on Uniswap is powered by permissionless liquidity -- anyone can become a market maker. In contrast to traditional finance, only centralized players and market makers with large amounts of capital can participate. With thousands of LPs, the Uniswap Protocol has the [deepest liquidity](https://blog.uniswap.org/uniswap-v3-dominance) in Web3 on major token pairs.

Just as we've simplified swapping, we've also made it simple and safe to LP. Providing liquidity can confuse new users, but we work to make it possible for anyone. Our liquidity pool interface lets users select fee tiers, price ranges, and deposit amounts.

![LP](//images.ctfassets.net/oc3ca6rftwdu/59J044WwyIFhDJiWA4Y3wG/504dfbc1abc9271c58912bab336d8e2a/LP.gif)

Uniswap Labs automatically configures LP slippage tolerances to protect LPs, who can adjust them as needed. This guarantees a minimum amount of liquidity the LP provides to the pool. 

***

We aim make it easy for anyone to interact with the Uniswap Protocol by focusing on simplicity and safety. We're constantly experimenting with new ways to provide the best UX while maintaining the high standard of security we're known for. If you have any feedback, we'd love to hear from you! Hop in our [Discord](https://discord.gg/FCfyBSbCU5) and let us know how to improve our swap and LP experience.

The Uniswap Labs marketplace lets users swap and LP with the Uniswap Protocol. We’ve built some additional features to make this experience safer and simpler.

Safety and Simplicity with Uniswap

We're excited to announce that you can now go directly to DeFi with the Uniswap mobile app! You can [download it here](https://apps.apple.com/app/apple-store/id6443944476?pt=123625782&ct=Announcement%20Blog&mt=8) in the iOS App Store. (PS, now on [Android](https://blog.uniswap.org/uniswap-wallet-android) too!)

<Video source="//videos.ctfassets.net/oc3ca6rftwdu/2KBRzdKFKccWggi2xBlO4H/a82234fea0770e5e910179ed0bb64e4f/MW__1_.mp4" description="Uniswap App GA Release Video" />

The Uniswap mobile app is the easiest way to trade tokens on the go. Our thousands of early access users love it. Starting today anyone can:
- Seamlessly swap on Mainnet, Polygon, Arbitrum, and Optimism
- Discover top tokens by market cap, price charts, and volume
- Favorite tokens and wallet addresses to stay up to date on trends and activity
- Connect to any app on Mainnet or L2s with WalletConnect
- See NFT details like floor price, owner, and collection description
- Choose your security method with manual or encrypted iCloud backups
- Get notified of any onchain activity with push notifications
- [Buy crypto](https://support.uniswap.org/hc/en-us/categories/11302011603341-Buying-Crypto) using fiat with fees as low as 2.55%, vs. 5% on other popular wallets

![Mobile FOR](//images.ctfassets.net/oc3ca6rftwdu/6OvJvSO5WoYHCncQhIq0DN/83f44584d7067d75955044852c3d9e0c/FOR__1_.png)

# Safe, simple swapping & self-custody
You need a self custodial wallet to do just about anything onchain --- [swap tokens](https://app.uniswap.org/), [buy NFTs](https://uniswap.org/blog/uniswap-nft-aggregator-announcement), [purchase crypto](https://uniswap.org/blog/web-fiat-on-ramp), or use apps. Self-custody makes DeFi safer and ensures your crypto can't be misused by a centralized party. But too many people get stuck at the starting line. We get thousands of user support tickets from Uniswap Web App users confused by wallets. So, we're proud to bring you a self-custodial wallet that is simple, safe, and easy to use.

As the most trusted team in DeFi, we're obsessed with security. After a thorough [security audit](https://github.com/trailofbits/publications/blob/master/reviews/UniswapMobileWallet-securityreview.pdf) from Trail of Bits, we [open-sourced](https://github.com/Uniswap/wallet) the mobile app so you can review the code yourself.

Creating your wallet should be as easy as creating an email address - now it is with Uniswap mobile app.

# How do I get my app?
Apple approved the app for use globally.

Our early access TestFlight users can head to the [iOS App Store](https://apps.apple.com/app/apple-store/id6443944476?pt=123625782&ct=Announcement%20Blog&mt=8) to download the app --- all the information and wallets you've loaded to the TestFlight version will automatically migrate.

Check out our Help Center content if you have questions: 

- [How to create a wallet, import recovery phrases, add new wallets, and more](https://support.uniswap.org/hc/en-us/sections/11302111085709)
- [How to protect my recovery phrase, recover from iCloud, and more](https://support.uniswap.org/hc/en-us/sections/11302223905677)
- [How to swap, bridge to L2s, connect via WalletConnect, and more](https://support.uniswap.org/hc/en-us/sections/11302165059213)

As always, share your feedback with us on [Discord](https://discord.gg/FCfyBSbCU5)!

The Uniswap mobile app is live on the iOS App Store! Download our self-custodial wallet and experience Web3 with simplicity, safety, and security.

Uniswap App is available now

The [Uniswap mobile app](https://blog.uniswap.org/uniswap-mobile-wallet-release) is a self-custodial wallet that is simple, safe, and easy to use. Now that it's out, we wanted to give you a behind-the-scenes look at our design principles, why we [open sourced](https://github.com/Uniswap/wallet) it, and how we think about security and privacy.

# Open Source
We open sourced the [Uniswap mobile app](https://github.com/Uniswap/wallet) for a few reasons:
- **Open Source is User Aligned:** Users have a right to choose the product that is best for them. Instead of trusting our claims about security, privacy, and data retention, users should be able to validate these claims by directly viewing the source code. Open source products allow users to evaluate their options to the greatest extent possible.
- **Open Source Builds Trust:** The Uniswap mobile app has been audited by multiple parties, including [Trail of Bits](https://github.com/trailofbits/publications/blob/master/reviews/UniswapMobileWallet-securityreview.pdf). These security reviews build trust in the safety of our products. Open sourcing takes this [one step further](https://dwheeler.com/secure-programs/Secure-Programs-HOWTO/open-source-security.html). By exposing our codebase to the public forum, security researchers can further vet our app.
- **Open Source is Collaborative:** When we started building the app, there weren't many open sourced wallets to learn from. By publishing our code, the Uniswap mobile wallet becomes a reference for other builders.

We've open sourced the entire app, including code that touches private keys, seed phrases, and on-chain data. You can inspect our repo, but some noteworthy code includes [key management](https://github.com/Uniswap/wallet/blob/main/ios/RNEthersRS.swift), [iCloud backup](https://github.com/Uniswap/wallet/blob/main/ios/RNICloudBackupsManager.swift), arbitrary transaction signing using [WalletConnect](https://github.com/Uniswap/wallet/blob/main/src/features/walletConnect/saga.ts#L289), [token swaps](https://github.com/Uniswap/wallet/blob/main/src/features/transactions/swap/swapSaga.ts) on multiple chains, viewing [NFTs](https://github.com/Uniswap/wallet/blob/main/src/components/images/NFTViewer.tsx), and various [UI components](https://github.com/Uniswap/wallet/tree/main/src/components).

# Security
We had two goals that informed the mobile app design principles:
1. Protect the user's wallet from being drained by securely storing and accessing the seed phrase
2. Protect the user from losing wallet access with backup options

### Seed Phrase Storage
Seed phrases and private keys stored on local devices use a combination of [iOS Keychain](https://support.apple.com/guide/security/keychain-data-protection-secb0694df1a/1/web/1) and [Secure Enclave](https://support.apple.com/guide/security/secure-enclave-sec59b0b31ff/web) to maximize security.

Apple built the iOS Keychain as a SQLite database that securely stores secrets, like passwords, certificates, and private keys. Some unique properties of the Keychain include:
- Items are encrypted using two AES-256-GCM keys: A table key and per-row key
- Items never leave your device
- Items cannot be shared between applications
- Items do not sync to the iCloud keychain

Keychain items are encrypted using 256-bit keys stored in Apple's [Secure Enclave](https://developer.apple.com/documentation/security/certificate_key_and_trust_services/keys/protecting_keys_with_the_secure_enclave), a dedicated hardware-based key manager isolated from the main processor.

Decrypting data within the Keychain requires a round trip through the Secure Enclave adding an extra layer of security. If the iOS keychain or application processor is compromised, Uniswap mobile app's keychain items remain encrypted because the encryption key is kept in a hardened hardware module separate from the main processor. iOS Keychain and Secure Enclave are Apple implementations and are not specific to our wallet.

![storage](//images.ctfassets.net/oc3ca6rftwdu/2jxQoIK1lsIIKJtUgCkbsJ/1b62682ce2fdd508747debcdfb3a5084/storage.jpeg)

### Accessing Private Keys & Seed Phrases
The Uniswap mobile app accesses seed phrases and private keys to
1. Display the seed phrase on-screen
2. Create signatures

To display items on-screen, we use a native [UI component](https://github.com/Uniswap/wallet/blob/main/ios/RNEthersRS.swift) written in Swift to fetch and display the seed phrase from the secure iOS Keychain.

The flow for creating signatures is more extensive. When the wallet has a message or transaction to sign, it is sent from React Native to Swift. The wallet's private key is securely fetched from the iOS keychain, and the `ethers-rs-mobile` [library](https://github.com/Uniswap/ethers-rs-mobile) - written in Rust - generates the signature. The valid signature is passed back through Swift and Javascript to execute transactions.

To further protect these sensitive user flows, you can enable biometric authentication via Face ID or Touch ID. Whenever you attempt to view your seed phrase or sign a transaction, you will be prompted to complete biometric authentication.

We compiled the `ethers-rs` [library](https://github.com/gakonst/ethers-rs) written in Rust to an iOS-compatible [version](https://github.com/Uniswap/ethers-rs-mobile) in C++, `ethers-rs-mobile`, giving us performance and security benefits with key derivation and signing functions. While React Native is fantastic for mobile app development, Javascript is susceptible to supply chain attacks from upstream dependencies. The `ethers-rs-mobile` library ensures that wallet seed phrases and private keys never touch Javascript code.

### Backups
All self-custodial wallets come with manual backups, encouraging users to write down their seed phrase for later recovery. But if a user loses their phone without a manual backup, they will lose access to their wallet. That’s why the Uniswap mobile app offers two recovery methods:
1. Manual seed phrase
2. iCloud backup

Users can manually back up their seed phrase by viewing it during the onboarding flow or by revealing it in-app after passing an authentication check. They are encouraged to physically write it down. We strongly recommend Face ID as the strongest authentication treatment.

iCloud recovery is optional but highly recommended for those new to crypto. When a user chooses the iCloud backup,  we require a user password to encrypt the seed phrase before storing it in iCloud. This way, even if a user's iCloud account is compromised their wallet is still protected. 

The seed phrase is locally encrypted using Apple's [AES.GCM](https://developer.apple.com/documentation/cryptokit/aes/gcm) cipher suite with a key derived from the user password using the [Argon2](https://datatracker.ietf.org/doc/rfc9106/) key derivation function. Even in this flow, sensitive data like the encryption key does not touch Javascript.

![200 (3)](//images.ctfassets.net/oc3ca6rftwdu/2GBU2o1xP4qQburVf3S5jn/aa656e87fe2eae8af15931301e0e8029/200__3_.jpg)

To restore a wallet from iCloud backup, users must be logged into their iCloud account and enter the password they used to encrypt their seed phrase.

![300 (1)](//images.ctfassets.net/oc3ca6rftwdu/4nyzcLAfo5U4h1THRZqrbd/afd5ad4b04afd1dc04fb8119899fe36a/300__1_.jpg)

This additional encryption mechanic maximizes security while still supporting an intuitive and familiar backup experience.

# Privacy
Uniswap Labs **does not** keep any information that allows us to identify individuals. We do not store first name, last name, street address, date of birth, email address, or IP address in any of our products, including our mobile wallet.

Anything we keep is confined to on-chain data and very limited off-chain data like device type and browser version, which allows us to troubleshoot errors and improve products for our users. None of this data is identifiable.

The Uniswap mobile app uses APIs like Infura, OpenSea, Covalent, TRM, and more. Many of these APIs help us serve data to the user, like token prices, NFT data, and on-chain activity. Most requests sent to these APIs are proxied through a Uniswap Labs server that removes and deletes IP addresses. A handful of API calls sent to Infura are direct, which includes IP. We are actively working to obfuscate non-proxied API calls.

# Download the mobile app!
The Uniswap mobile app is live on [iOS and Android](https://wallet.uniswap.org/). You can also learn more about the wallet features in our [announcement post](https://uniswap.org/blog/uniswap-mobile-wallet-early-access) and dive into the [wallet repo](https://github.com/Uniswap/wallet).

If you have any questions or feedback, please join [Discord](https://discord.gg/FCfyBSbCU5) and ask!

Uniswap engineers give a behind the scenes look at how we built the Uniswap mobile wallet, with a focus on security architecture, open source principles, and privacy considerations.

A Technical Overview of the Uniswap Mobile App

You need a wallet to do just about anything on-chain - [swap](https://app.uniswap.org/), [buy NFTs](https://blog.uniswap.org/uniswap-nft-aggregator-announcement), and [purchase crypto](https://blog.uniswap.org/web-fiat-on-ramp). But too many people get stuck at the starting line. We get thousands of user support tickets from Uniswap Web App users that boil down to confusion about self-custody wallets. Self-custody is a core tenet of DeFi and ensures your crypto can't be misused by a centralized party. So, we're proud to bring you a self-custodial wallet that is simple, safe, and easy to use.

<Video source="//videos.ctfassets.net/oc3ca6rftwdu/7jS48sWP4lCCx2YwJvwPMd/9a7151c576e9db420c86855ae0f5f9a0/ML.mp4" description="Mobile App Early Release" />

Starting today, we're sharing early access so you can:

- Trade tokens directly with the most trusted DeFi protocol
- Seamlessly switch between Mainnet, Polygon, Arbitrum, and Optimism
- Discover top tokens by market cap, price charts, and volume
- Favorite tokens and wallet addresses to stay up to date on trends and activity
- WalletConnect to any app on Mainnet or L2s
- Back up your seed phrase on iCloud or manually
- Get notified when transactions complete - on any device - with push notifications
- And, it's completely [open-sourced](https://github.com/Uniswap/wallet)

The swap experience you know and love now fits in your pocket. Creating your wallet should be as easy as creating an email address -- and now it is with Uniswap mobile app. And now, you can get [Uniswap on Android](https://blog.uniswap.org/uniswap-wallet-android)!

## A self-custody mobile wallet from the most trusted name in DeFi

The Uniswap mobile app is the easiest way to trade tokens on the go. You can check price charts, search for any token, and seamlessly swap on L1 or L2 networks without needing to configure or switch networks! When your transaction completes, you'll receive a push notification in real-time.

![swap (1)](//images.ctfassets.net/oc3ca6rftwdu/NW076mWTtorURlMf8R0hE/942c4f9ed2d7b81a652e33a4d64b883c/swap__1_.png)

Navigating your favorite apps has become easier too! The Uniswap mobile app is the best way to manage your portfolio across Ethereum, Polygon, Arbitrum, and Optimism. Using WalletConnect, you can manage connections to multiple web apps on different networks simultaneously. For example, you can connect to Lido on Mainnet, Aave on Polygon, and Uniswap on Arbitrum without switching networks.

![connect](//images.ctfassets.net/oc3ca6rftwdu/5nLTOXNvPSqhpCN0a2W6RY/5e7ab98afe125a52345027795cb13cfa/connect.png)

To ensure the highest security standard, we worked with Trail of Bits for our [audit](https://github.com/trailofbits/publications/blob/master/reviews/UniswapMobileWallet-securityreview.pdf). Imported and newly created wallets will have their seed phrases and private keys encrypted and stored on devices using Apple's secure enclave, which is excluded from device backups. You can store your seed phrase manually with a paper copy or encrypt and store it on Apple iCloud so that if you lose your phone, your seed phrase is backed up and protected.

![secure](//images.ctfassets.net/oc3ca6rftwdu/615xYkxM8dDevUHs0jSSlb/1ccd08d11d5c49c07f097663231ba545/secure.png)

## Get early access
We'd love to release the Uniswap mobile app for everyone on the App Store, but the best we can offer is early access.

Apple approved our first build in October but rejected the final build just a few days before our December launch. Since then, we've responded to their concerns, answered every question, and reiterated that we are 100% compliant with their [guidelines](https://developer.apple.com/app-store/review/guidelines/). Other self-custody swapping wallets have been approved, but Apple won't green-light our launch and we don't know why. We are stuck in limbo.

So instead of waiting alone, we thought it would be more fun to wait together, with a few thousand [Testflight](https://developer.apple.com/testflight/) users. That means it's functionally the same, safe to use, and can be updated to the App Store version after Apple approves it. We like Apple products -- that's why we built our app for iOS. But this experience has reminded us why we got into building open, accessible technology in the first place.

We'll roll out access codes across community channels and time zones over the next two weeks, starting at ETHDenver. If you're here, come find us at our booth! Follow us on [Twitter](https://twitter.com/uniswap) and [Discord](https://discord.gg/FCfyBSbCU5) to never miss a drop.

We have so many exciting features in store. But we can't deliver it to everyone until Apple gives us the green light. Follow us on Twitter to get TestFlight access links and download the app.

In the meantime, we're working hard to bring the Uniswap app to our users on other platforms. Stay tuned!

***

Helpful links to get started:
- [How to use download via TestFlight](https://support.uniswap.org/hc/en-us/sections/13461737519885)
- [How to create a wallet, import recovery phrases, add new wallets, and more](https://support.uniswap.org/hc/en-us/sections/11302111085709)
- [How to protect my recovery phrase, recover from iCloud, and more](https://support.uniswap.org/hc/en-us/sections/11302223905677)
- [How to swap, bridge to L2s, connect via WalletConnect, and more](https://support.uniswap.org/hc/en-us/sections/11302165059213)

Join our [discord](https://discord.gg/FCfyBSbCU5) to give us your feedback!

The Uniswap mobile app - available for early access - is a self-custodial wallet created by Uniswap Labs to simply and safely swap, store, and use crypto on Mainnet, Optimism, Arbitrum, and Polygon.

Uniswap Mobile App Early Access

Since we launched [NFTs on Uniswap](https://blog.uniswap.org/uniswap-nft-aggregator-announcement), we've been working to create a more unified experience between NFTs and ERC-20s. Starting today, buyers can purchase [NFTs on Uniswap](https://app.uniswap.org/#/nfts) with any ERC20 token and sellers will still receive their listing token.

<Video source="//videos.ctfassets.net/oc3ca6rftwdu/16ZjgzV12p5wTbTO0kQW3D/bf2ef789aa5ffa02546702053f878b5d/PWAT.mp4" description="Pay With Any Token" />

NFTs are typically priced in ETH, but this can present some difficulties:

- Not everyone has enough ETH in their wallet. Swapping an ERC20 into W/ETH solely for purchasing an NFT is an avoidable step.
- Pricing out ETH needed to purchase an NFT and pay for gas can be inexact, leaving behind a dusting of ETH.

This feature is made possible by our new [Universal Router](https://blog.uniswap.org/permit2-and-universal-router) contract, which, for the first time, unifies token and NFT trades into a flexible and gas-optimized swap router. Universal Router finds the most cost-efficient route to trade your inputted ERC20 token for the purchase token, such as ETH, then settles the trade through Opensea's [Seaport](https://opensea.io/blog/announcements/introducing-seaport-protocol/) -- a marketplace protocol for swapping ERC721s and ERC1155s.

Our v1 supports single input tokens --- meaning NFTs can be purchased with one ERC20 token --- and our next release will support multiple input tokens. In other words, today you can purchase two [Froggy Friends](https://app.uniswap.org/#/nfts/collection/0x29652c2e9d3656434bc8133c69258c8d05290f41) with 500 DAI. And soon you'll be able to purchase two Froggy Friends with 0.1 ETH and 275 DAI.

![image](//images.ctfassets.net/oc3ca6rftwdu/5C75sF2pIwko3flQPz8BPV/b94b7a0a2efab21456749ba9456f3257/image.jpeg)

By bringing ERC20s and NFTs closer together, we're exploring what digital ownership and exchange can make possible. We've already seen some projects test these boundaries with projects like [Treasure DAO](https://treasure.lol/) that price their assets exclusively in MAGIC. We expect to see more creative intersections of ERC20s and NFTs in the future.

As projects experiment with pricing digital assets in currencies other than ETH, they can execute those trades [using](https://github.com/Uniswap/universal-router-sdk) Uniswap's Universal Router. Try it out yourself! Head over to [app.uniswap.org/#/nfts](https://app.uniswap.org/#/nfts) and buy an NFT with any ERC20 token.

Pay with any token to buy NFTs on Uniswap!

Buy NFTs with any ERC20 token

Starting today, you can purchase crypto on the [Uniswap Web App](https://app.uniswap.org/) using a credit card, debit card or bank transfer at the best rates in web3. Convert from fiat to crypto onto Ethereum mainnet, Polygon, Optimism, and Arbitrum, and start swapping in minutes!

# Direct to DeFi
Decentralized exchanges (DEXs) are the safest way to trade digital assets compared to their centralized counterparts. With self-custodial wallets, permissionless and immutable protocols, and a transparent public ledger, DEXs have built-in user protections. However, a major barrier to DeFi adoption has been the onboarding experience, compelling users to store their assets on CEXs for convenience, despite the risks.

Now you can go direct to DeFi with the [Uniswap Web App](https://app.uniswap.org/) and buy crypto on our web app using any card or bank transfer in 160+ countries with our first partner, [MoonPay](https://www.moonpay.com/business/onramps). We're bringing you the best fiat on-ramp experience - no spread fees on USDC, the lowest processing fees in the market, and instant access!

To purchase
- Connect your wallet to the Uniswap Web App
- Click the wallet dropdown
- Buy crypto and use it instantly!

![interface](//images.ctfassets.net/oc3ca6rftwdu/YxTu2Yj8b4HPt4oDJ8dAW/b95a2c5a7996d22d375d7b8eca5810c4/interface.png)

### What payment methods are supported?

Major payment methods like cards and bank transfers are supported. This will vary depending on the region. Bank transfers are only available for [most of the US](https://support.moonpay.com/hc/en-gb/articles/5691536596241-What-are-our-supported-countries-states-and-territories-for-buying-NFTs-with-a-card-), Brazil, SEPA, and the UK. See the MoonPay Help Center for more information on supported [payment methods](https://support.moonpay.com/hc/en-gb/articles/360017624078-What-are-your-supported-payment-methods-) and [fiat currencies](https://support.moonpay.com/hc/en-gb/articles/360011931457-Which-fiat-currencies-are-supported-).

### What tokens are supported?

At launch, we will support DAI, ETH, MATIC, USDC, USDT, WBTC, and WETH. However, this does depend on the region. For example, US users cannot purchase WETH or WBTC. See the [MoonPay Help Center](https://support.moonpay.com/hc/en-gb/articles/5691536596241-What-are-our-supported-countries-states-and-territories-for-buying-NFTs-with-a-card-) for further details.

### What chains are supported?

You can purchase crypto and send to any wallet on Ethereum mainnet, Polygon, Optimism, and Arbitrum.

### Do I need to verify my identity with MoonPay?

To purchase crypto with a card or bank account, you will need to observe MoonPay's [KYC/AML policy](https://www.moonpay.com/legal/aml_kyc_policy). You **do not** need to verify your identity to use the Uniswap Protocol, **only** when purchasing crypto through MoonPay. MoonPay **does not** share customer data with Uniswap Labs. Uniswap Labs **does not collect** and store financial data such as credit card, debit card, and bank information, or personal data, such as first name, last name, street address, date of birth, email address, and IP address.

### What are the fees?

We have some of the lowest in the entire market:

- **No Minimum Fee** - Payment processors often charge a minimum fee regardless of purchase size. Our minimum fees are zero!

- **No Spread on USDC** - Payment processors quote a slightly higher token price than the market rate. This fee is called a "spread" and contributes to their margins. We have zero spread for USDC purchases!

- **Low spread and processing fees** - We've also negotiated low spread and processing fees on all supported currencies.

### How much crypto can I buy?

**Minimum** - Many supported cryptocurrencies have a minimum purchase size of 15 USD or equivalent in most local currencies. ETH, USDC, USDT, and DAI have variable minimum purchase sizes based on market conditions.

**Maximum** - Buy limits depend on which cryptocurrency you buy and which fiat currency you use. Notably, USDC has an upper limit of 10,000 on Arbitrum and Optimism while popular fiat currencies are capped at USD at 12,000, GBP at 9,000, EUR at 10,000, and CAD at 16,000.

Your payment provider may put further limitations on your purchase size. We recommend either bank transfer or debit cards. Note that minimum and maximum purchase sizes may change as per MoonPay's policies.

### When will the purchased crypto arrive in my wallet?

Your purchases will be available in your wallet within minutes, though the exact payment  method will determine the transfer time. Read more on the [MoonPay Help Center](https://support.moonpay.com/hc/en-gb/articles/360011931417-How-long-does-it-take-to-receive-my-cryptocurrency-).

### Can I send crypto back into my bank account?

Not yet. We're working to integrate an off-ramp. Today, you can sell using [MoonPay's website](https://www.moonpay.com/buy) or any other off-ramp platform.

### Can I buy NFTs with fiat?

Not directly. You can buy ETH through MoonPay from the Uniswap Web App. You can use this ETH to [purchase NFTs](https://uniswap.org/blog/uniswap-nft-aggregator-announcement) on the [Uniswap Web App](https://app.uniswap.org/#/nfts).

Buy crypto with a card or bank account directly on the Uniswap Web App. Get the best rates in the market and start trading instantly!

Buy Crypto with your Card or Bank Account

Trade your favorite tokens and NFTs all in one place!

Starting today, you can trade NFTs across major marketplaces to find more listings and better prices. To celebrate NFTs on Uniswap, we are airdropping approximately 5 million USDC to certain historical [Genie](https://uniswap.org/blog/genie) users and offering gas rebates to the first 22,000 NFT users (more on that below). We also continue to be open-source, trustless, and self-custodial, staying true to our values of decentralization.

<Video source="//videos.ctfassets.net/oc3ca6rftwdu/2GYHs82yBKTH6vJKE6TkGn/c5d89d3cb37e68a096979186599ca6af/NFT__1_.mp4" />

NFTs and ERC-20 tokens have largely existed as two separate ecosystems within crypto, but both are essential to growing the digital economy. Launching NFTs on Uniswap is our first step in building more interoperable experiences between the two.

To bring users the first-rate experience they've come to expect with Uniswap, we built the aggregator to deliver better prices, faster indexing, safer smart contracts, and efficient execution.

With Uniswap, the NFT ecosystem can expect:
* **More listings, at better prices.** Aggregators deliver better prices by combining multiple marketplace listings into one interface. At launch, Uniswap will support OpenSea, X2Y2, LooksRare, Sudoswap, Larva Labs, X2Y2, Foundation, NFT20, and NFTX.

![avg-floor-price (1)](//images.ctfassets.net/oc3ca6rftwdu/14RSI77Va5NVT6Zs9nTNuT/ed31a9ba52e3fc3341bcf7abcb7b7af1/avg-floor-price__1_.jpeg)

* **More gas savings.** Save up to 15% on gas costs compared to other NFT aggregators when purchasing across marketplaces. Powered by our new open-sourced [Universal Router contract](https://uniswap.org/blog/permit2-and-universal-router), Uniswap’s aggregator can save tens of thousands of gas units over other marketplaces. 
* **Trustless and open source.** Uniswap is committed to being trustless, transparent, and open source. We’ve brought those same design principles to NFTs and open-sourced all of our front-end code, making us the first major NFT platform to do so.

## Genie Airdrop
We are distributing approximately 5 million USDC to certain historical Genie users to show our gratitude to longtime Genie users and welcome them into the Uniswap community. Based on a snapshot taken on **April 15, 2022 at 00:00 UTC**, we’ve created two tiers for recipients:
1. The $300 tier is available to wallets that completed more than one transaction before the snapshot.
2. The $1,000 tier is available to wallets that held the Genie:Genesis NFT as of the snapshot.
 * Users are eligible per unique address, meaning multiple Genie:Genesis NFTs in the same wallet are only eligible once.
 * This tier is also available to wallets that purchased a Genie:Genesis NFT or a Genie:Gem NFT between 5:59 pm and 9:15 pm UTC on June 21st.

Users are eligible for both tiers and can claim their airdrop in USDC on [app.uniswap.org](https://app.uniswap.org/) for the next 12 months. Connect your wallet and click the wallet dropdown in the top right. If you’re eligible for the airdrop, there will be an option to claim it!

![wallet-claim (1)](//images.ctfassets.net/oc3ca6rftwdu/4zUPH5uvp5eutFddpm26Ix/1d897d87ce135c0a28d86fdd28813114/wallet-claim__1_.png)

## Gas Rebate Promotion
To welcome our new users, we will be starting a gas rebates promotion that begins today, ends on December 14, 2022, and is claimable on January 16, 2023 through the Uniswap app for 12 months.

The first 22,000 distinct wallets that purchase an NFT during this promotional period will qualify for a rebate on their first transaction. Partial transactions in which users successfully purchase some, but not all, NFTs are eligible for rebates. Failed transactions are not eligible. The gas rebate is capped at 0.01 ETH
* If a user spends 0.01 ETH or less on gas, their transaction is fully covered.
* If a user spends more than 0.01 ETH on gas, they’ll receive a 0.01 ETH rebate for that transaction.

_Update (January 18th, 2022)_: We airdropped 0.01 ETH to distinct wallets that traded between these dates. Check the transaction from this [wallet](https://etherscan.io/address/0xec50d70c156f9949010244a5c48cae36604c5765).

Buy and sell NFTs across more listings at better prices on Uniswap. NFTs on Uniswap saves you time and money by aggregating listings from the largest marketplaces.

NFTs are Officially Live on Uniswap!

Today, Uniswap Labs has released two new smart contracts:

1. [Permit2](https://github.com/Uniswap/permit2) allows token approvals to be shared and managed across different applications creating a more unified, cost-efficient, and safer UX.

2. [Universal Router](https://github.com/Uniswap/universal-router) unifies ERC20 and NFT swapping into a single swap router. Integrated with Permit2, users can swap multiple tokens and NFTs in one swap while saving on gas fees.

We originally conceived Permit2 and Universal Router to improve our own products, optimizing gas costs, simplifying user transaction flows, and strengthening security. As we ideated, we realized that other applications could greatly benefit from integrating these contracts. Uniswap is committed to building public infrastructure that pushes crypto forward, which is why we designed these contracts to be used by the entire developer ecosystem, including extensive documentation, SDKs, and a two-week bug bounty.

## Permit2 - Efficient, consistent, and secure approvals

[Permit2](https://github.com/Uniswap/permit2) is a token approval contract that can safely share and manage token approvals across different smart contracts. As more projects integrate with Permit2, we can standardize token approvals across all applications. In turn, Permit2 will improve the user experience by reducing transaction costs while improving smart contract security.

Originally defined in [EIP-20](https://eips.ethereum.org/EIPS/eip-20), the canonical token approve method suffered from a couple of weaknesses:

1. Users had to send an approval transaction for each new application they wanted to use. This led to a confusing UX where users might be asked to send multiple transactions before using an application, wasting gas and time.

2. For convenience's sake, applications asked users to approve the maximum allowance, giving applications access to a wallet’s entire token balance for an indefinite amount of time. Though Uniswap has never suffered from an exploit, infinite approvals can be [hacked](https://medium.com/amber-group/exploiting-primitive-finances-approval-flaws-b86db031b4) to steal user tokens. ([PSA to revoke active allowances.](https://revoke.cash/))

[EIP-2612](https://eips.ethereum.org/EIPS/eip-2612) iterated on token approvals. Users could interact with application contracts without requiring prior approval by appending a signed permit message to their transaction. While EIP-2612 made token approves safer with granular allowance approvals, tokens launched before EIP-2612 did not support the permit function and not all newer tokens have adopted it.

### How Permit2 improves UX
Permit2 further iterates on the token approval mechanism by introducing signature-based approvals and transfers for any ERC20 token, regardless of EIP-2612 support. Permit2 also comes with a host of exciting features that unlock more secure token approval options and enable a more consistent user experience across any integrating application. The full list of features can be found in our [docs](https://docs.uniswap.org/protocol/permit2/overview), but notably:

1. **Permits for *any* token.** Applications can have a single transaction flow by sending a signature along with the transaction data for any token, including those not supporting a native permit method.

2. **Expiring approvals.** Approvals can be time-bound, removing security concerns around hanging approvals on a wallet’s entire token balance. Revoking approvals do not necessarily have to be a new transaction.

3. **Signature-based transfers.** Users can bypass setting allowances entirely by releasing tokens to a permissioned spender through a one-time signature.

4. **Batch approvals and transfers.** Users can set approvals on multiple tokens or execute multiple transfers with one transaction.

5. **Batch revoking allowances.** Remove allowances on any number of tokens and spenders in one transaction.

![diagram-1](//images.ctfassets.net/oc3ca6rftwdu/1h776yrugZ1q5gbpKGP3xl/cb643db8e9e3936d82e20399574a742c/diagram-1.jpeg)

### Integrate Permit2

Permit2 is a non-upgradable, unowned, and [open-source](https://github.com/Uniswap/permit2) contract that has been deployed to the same [address](https://etherscan.io/address/0x000000000022D473030F116dDEE9F6B43aC78BA3) across Ethereum, Optimism, Arbitrum, Polygon, and Celo. To start integrating, see the [developer docs](https://docs.uniswap.org/protocol/permit2/overview), [SDK](https://github.com/uniswap/permit2-sdk), and this [guide](https://blog.uniswap.org/permit2-integration-guide).

As part of our robust smart contract development standards, we’ve also launched a [bug bounty](https://uniswap.org/bug-bounty) program for the Permit2 contracts.

Currently, Permit2 only supports ERC20 tokens. Uniswap Labs will be releasing a version for NFTs in the near future.

## Universal Router - Unified token and NFT swaps

We’ve integrated Permit2 into another exciting contract we’re releasing. The [Universal Router](https://github.com/Uniswap/universal-router) is Uniswap’s next-generation router that unifies token and NFT trades into a highly flexible, gas-optimized, secure, and extensible swap router. The Universal Router significantly improves product and user experience, which is why it will become the default swap router for all Uniswap swaps in the near future.

Swap routers take in defined parameters (e.g. swap route, maximum slippage, and swap recipient) and execute swaps against your desired venues (e.g. Uniswap pools, NFT marketplaces). Swap routers are optimized to find the lowest prices and execute them at the lowest gas cost.

However, current swap routers suffer from two inefficiencies:
* Existing swap routers typically only support either NFTs or ERC20 tokens. Trades that involve both currently require multiple transactions. For example, buying an NFT with an ERC20 token would require two separate transactions. First, a swap from DAI to ETH, and then the final swap from ETH to NFT.
* Because swap routers are responsible for transferring user tokens, users must approve every token on first use, making them costly to upgrade. This is especially problematic for aggregator swap routers as contracts must be redeployed each time a new protocol is supported.

### How Universal Router unifies swaps
With the Universal Router, users can execute multiple token swaps on Uniswap V2 & V3, and buy NFTs from multiple marketplaces all in one transaction. For example, envision a swap that
* Uses three different input tokens
* Swaps on Uniswap V2 and V3 using a split route
* Performs an ETH to WETH wrap
* Buys an NFT on OpenSea 

This entire flow can be executed as a single transaction.

![diagram-2](//images.ctfassets.net/oc3ca6rftwdu/1yOwG7bNyNEhQIIYz1k8eZ/ab4a17b0fb8dbb792668efdb91a000ca/diagram-2.jpeg)

The Universal Router is integrated with Permit2, meaning that users approve with Permit2 and pass their signature through to the Universal Router, abstracting the token approval flow from the router contracts. Developers can deploy new versions of the Universal Router without requiring users to send a separate approval transaction each time. This allows the Universal Router - or any integrated contract - to remain immutable, while also allowing new features to be added in the future.

### Integrate Universal Router
The Universal Router is a non-upgradable, unowned, and [open-source](https://github.com/Uniswap/universal-router) contract that has been deployed across [Ethereum](https://etherscan.io/address/0xEf1c6E67703c7BD7107eed8303Fbe6EC2554BF6B), [Optimism](https://optimistic.etherscan.io/address/0xb555edF5dcF85f42cEeF1f3630a52A108E55A654), [Arbitrum](https://arbiscan.io/address/0x4C60051384bd2d3C01bfc845Cf5F4b44bcbE9de5), [Polygon](https://polygonscan.com/address/0x4C60051384bd2d3C01bfc845Cf5F4b44bcbE9de5), and [Celo](https://explorer.celo.org/mainnet/address/0xC73d61d192FB994157168Fb56730FdEc64C9Cb8F/transactions). To start integrating, see the [SDK](https://github.com/Uniswap/universal-router-sdk).

Similarly to Permit2, we are running a [bug bounty](https://uniswap.org/bug-bounty) program to keep Uniswap contracts to the highest security standards.

#### Acknowledgments
Uniswap Labs would like to thank [merklejerk](https://twitter.com/merklejerk) for his work on [permit-everywhere](https://github.com/merklejerk/permit-everywhere) which was the main inspiration for Permit2. We would also like to thank Paradigm’s [transmissions11](https://twitter.com/transmissions11) for his contributions and feedback on Permit2.

Uniswap Labs releases Permit2 to improve ERC20 token approvals across all applications and Universal Router to unify ERC20 and NFT swaps into a single router.

Introducing Permit2 & Universal Router

Today, we’re launching a refresh of the Uniswap web app! It’s the same interface you know and love, with more token data, discovery, and search options so you can swap more easily.

Instead of hopping back and forth between charts and data sources, community resources, and project websites, you can now access the information you need to swap directly on our web app.

Check it out.

<Video source="//videos.ctfassets.net/oc3ca6rftwdu/47uz123W2RA7dYRnOrEJua/ccad8c83b877b8cb015b398002f2c66a/token-explore.mp4" description=" " />

You can do more, but it’s still as simple as ever.

- Tokens Tab: discover and compare all of the tokens available on the Uniswap web app in a new “Tokens” tab. Click into a token to see and analyze more details and indications of risk.
- Search: easily find and navigate to tokens across the Uniswap web app.
- User Support: open a support ticket with the click of a button (in addition to its extensive content library that users can access at any time).

This is the first of many changes we’re working on to help make web3 simpler, safer, and more powerful for both new and longtime users. The web interface is fully open-source, and you can check out the [GitHub repo here](https://github.com/Uniswap/interface).

We want to hear what you think! Join the Uniswap Discord channel to chat with the community and reach out to the Customer Experience team at [support.uniswap.org](http://support.uniswap.org/) with any questions.

---

To get involved and stay up to date:

- Join the Uniswap community [discord](https://discord.com/invite/FCfyBSbCU5)
- Follow Uniswap Labs on [Twitter](https://twitter.com/Uniswap)
- Register as a delegate on [Sybil](https://sybil.org/#/delegates/uniswap)
- Participate in Uniswap [governance](https://gov.uniswap.org/)
- Get support with our [Help Center](http://support.uniswap.org/)

Uniswap Team 🦄

Uniswap Labs unveils updated web interface.

Introducing the Refreshed Uniswap Web App

Uniswap Labs supports The Merge and does not have plans to support any forks in our web app. The move from proof of work (PoW) to proof of stake (PoS) serves as an important stepping stone to scaling the Ethereum ecosystem and to reducing its environmental footprint immediately. If you want to learn more about The Merge, check out Ethereum’s [announcement](https://blog.ethereum.org/2022/08/24/mainnet-merge-announcement).

**As a Uniswap Protocol user, you do not need to do anything.** The Uniswap Protocol will continue to work without issue through this transition. The web app ([app.uniswap.org](http://app.uniswap.org/)) will also continue to function, though if any of our third-party infrastructure providers (e.g. node providers) have downtime, some users may experience brief periods of unavailability.

For those of you building on top of Ethereum, we would like to share two PSAs to keep the web3 ecosystem as safe as possible:

## Change in Uniswap v3 TWAP oracle security

Uniswap v3 oracles were designed with PoW security tradeoffs in mind, where it’s predictably difficult for a single entity to mine multiple blocks in a row. In PoS, block producers are announced up front every epoch — which is 6 minutes long. This "look-ahead" means that the cost of manipulating two consecutive oracle values can be significantly lower than in PoW. As an example, the validator for block N could pay a premium in gas to control the last transaction in block N-1, knowing that they control the order of transactions in the next block. In the context of time weighted average price (TWAP) oracles, this would give them a window to manipulate by changing the price to a very high or low value to influence the average.

It’s worth noting that validators are selected randomly. However, a large validator pool can also randomly be selected to produce [two or more blocks in a row](https://alrevuelta.github.io/posts/ethereum-mev-multiblock). Given the size of some of the larger pools, this could be a frequent occurrence and also open up the ability for a validator to manipulate oracle prices by, again, predictably controlling two or more blocks in a row.

We recommend considering this additional attack vector when relying on TWAP oracle in Uniswap Protocol v3. If you are looking for workarounds, [Median Oracle implementation](https://github.com/euler-xyz/median-oracle) by the Euler team is a solid implementation to explore.

## Replayability for permits

[Permits](https://eips.ethereum.org/EIPS/eip-2612) are an alternative to approves — where a user can allow another contract to spend a token on their behalf. Permits save gas by skipping the approve step, allowing users to simply create a cryptographic signature off-chain indicating their consent.

However, some permit implementations (including DAI, USDC, UNI, and v2 LP tokens) include a hardcoded chain ID of 1 when signing a permit transaction. In the event of a chain fork, the new chain ID is ignored. This creates a novel signature replay vector, where a permit to allow a specific address to spend on a user’s behalf can be replayed on the forked chain.

For example, a permit signed for a Uniswap Router on ETH can be used for same router, deployed on the same address on ETHPoW. This is not a risk, as the Uniswap Router isn’t capable of moving any funds from your wallet without an additional authorizing transaction. However, if there was a malicious contract deployed on ETHPoW to _the same address_, it could reuse the signed permit from ETH to move funds on ETHPoW without user’s permission.

As always, we suggest only signing permits for contracts you trust. If you participate in ETHPoW, we suggest extra due diligence.

---

These are ultimately small issues and well worth navigating given the benefits to the overall ecosystem. We are excited and looking forward to The Merge!

What The Merge Means for the Uniswap Protocol

What To Know Ahead of The Merge

_By [Noah Zinsmeister](https://twitter.com/NoahZinsmeister)_

Today, I'm pleased to announce that I've transferred ownership of [web3-react](https://github.com/Uniswap/web3-react) to Uniswap Labs. For the uninitiated, web3-react is a simple, maximally extensible, dependency minimized framework for building modern Ethereum dApps. The repository’s new home is now [Uniswap/web3-react](https://github.com/Uniswap/web3-react), though distribution will still be under the `@web3-react` npm organization. This is the culmination of a multi-year, ongoing integration, and I'm thrilled that my fellow engineers at Uniswap Labs will be able to take an ownership stake in one of the most widely used web3 frontend libraries — with the goal of leveling up the library in the long run.

When I first became interested in Ethereum in late 2017, I started a side project called [ProveIt](https://github.com/NoahZinsmeister/ProveIt). I had tons of fun brainstorming use cases for a public, immutable ledger, and writing my first smart contract. But I struggled to create even a rudimentary frontend for my project (though in the end, it [turned out okay](https://noahzinsmeister.github.io/ProveIt/)).

![proveit](//images.ctfassets.net/oc3ca6rftwdu/5E4ASenvc2b5wCGYSgeKYd/3415d4ffab78fe70858e554b5d8a9438/proveit.png)

I quickly realized that I wasn't just a bad frontend developer — or at least that wasn't the only problem... Frontend tooling for dApps was in a sorry state, so in 2018 I set out to build what became [web3-webpacked](https://github.com/NoahZinsmeister/web3-webpacked), a "drop-in web3 solution for single-page Ethereum dApps". This experience quickly brought me to the boundaries of my technical knowledge, and while the library was beginning to pick up steam, I realized that a more elegant approach built on stronger foundations was warranted. This approach was the beginning of [web3-react](https://github.com/Uniswap/web3-react), which is still in use today and has nearly 4k stars on Github and over [300k monthly downloads](https://npm-stat.com/charts.html?package=%40web3-react%2Fcore&from=2020-01-01&to=2022-06-30).

![downloads per month](//images.ctfassets.net/oc3ca6rftwdu/vblhpCaumIqjzVNPdiH7Z/5b34ce7b8dc5392dace955aa27b4cf7d/downloads_per_month.png)

web3-react was actually (indirectly) responsible for landing me my role at Uniswap, and my first official project was updating the Uniswap interface to use my library (which I completed in commit [#4e41391](https://github.com/Uniswap/interface/commit/4e413915f8fa3bfdda98c6d623dd35d207cda150)). This effort neatly separated the majority of wallet connection logic from app logic and offered easy access to a user's address and web3 connection throughout the codebase. This migration represented a big DevEx/UX improvement (at a time when dApps were regularly blocking interaction behind a required MetaMask popup!), and I was proud to have contributed, albeit in a small way, to the improvement of web3 developer tooling.

However, as the years went on, and wallet standards came and went, I was only able to give intermittent support to web3-react. Because I'd dogfooded the library, I always made an effort to keep it functional, but I occasionally fell behind the state of the art, as more and more of my time went into smart contract development.

Recently, I felt compelled to modernize the library in a v8 release, which is currently in a fully functional beta. This release dramatically improved performance and reduced developer friction, but it also included some breaking changes, and I quickly realized that as a solo maintainer I wasn't going to be able to offer the level of support and backwards compatibility that's required for a library used by applications with Uniswap's level of scale. By transferring ownership of web3-react to Uniswap Labs, we now have a much larger and more talented team dedicated to maintaining the library.

Being able to write and maintain open-source, copyleft code has always been a pleasure and an honor for me, and I'm excited for what this new chapter will bring to web3-react.

Download the repo [here](https://github.com/Uniswap/web3-react).

Engineering Lead, Noah Zinsmeister, transfers ownership of GitHub repo, web3-react, to Uniswap Labs

A New Chapter for web3-react

Today, we’re thrilled to announce the launch of the Swap Widget. The Swap Widget bundles the whole Uniswap experience into a single React component that developers can easily embed in their app with one line of code.

We envision a world in which everyone is able to access fair, open, and transparent markets. The Swap Widget brings this vision closer to reality by allowing developers to easily embed Uniswap swapping functionality, allowing their users to seamlessly swap tokens, join a community or DAO, wrap assets, and more, without leaving their apps.

![swap-widget-color](//images.ctfassets.net/oc3ca6rftwdu/6gyuF38uZALpwav6Bvojaf/aa56e1347a7377cfeca6c88c4ba1ab97/color.gif) 

We’re excited to launch the Swap Widget in some of web3’s most popular apps — [OpenSea](https://opensea.io/), [Friends With Benefits](https://www.fwb.help/), and [Oasis.app](https://oasis.app/).

On OpenSea, NFT collectors can seamlessly swap tokens for WETH or wrap ETH to WETH to fund their next purchase on the fly, without leaving the app. On FWB, approved community members can easily purchase the FWB tokens they need to join the DAO on the FWB homepage. And on Oasis.app, investors can deploy their crypto into DeFi.

## Swap Widget Features

The Swap Widget bundles the whole Uniswap experience into a single component. This includes several powerful features:

- **Polished UI:** the Widget inherits the Uniswap App’s design practices, smooth animations, and error handling
- **Customizable:** tailor the colors, font, and rounded corners to match your app’s visual identity
- **Custom token lists:** select the tokens that appear in the Swap Widget to meet your user’s needs
- **Great pricing:** the Swap Widget bundles Uniswap Labs’ Auto Router to find the best price across Uniswap v2 + v3 token pools
- **Low gas on L2:** the Swap Widget supports all chains where Uniswap protocol is available, including Polygon, Arbitrum, and Optimism

## Integrate the Swap Widget today

The Widget is now available for all developers, and can be embedded into your app with only **one line of code**.

To start integrating, see the [developer docs](https://docs.uniswap.org/sdk/widgets/swap-widget).

Join the [Discord channel](https://discord.gg/XhkTDxFK) for questions and technical support.

As always, the Swap Widget is fully open source. You can check out the [GitHub repo here](https://github.com/Uniswap/interface).

---

To get involved and stay up to date:

- Join the Uniswap community [discord](https://discord.com/invite/FCfyBSbCU5)
- Follow Uniswap Labs on [Twitter](https://twitter.com/Uniswap)
- Subscribe to the Uniswap Labs [blog](https://uniswap.org/rss.xml)
- Register as a delegate on [Sybil](https://sybil.org/#/delegates/uniswap)
- Participate in Uniswap [governance](https://gov.uniswap.org/)

Uniswap Team
🦄

Embed the Uniswap experience with one line of code!

Introducing the Swap Widget

Today, we’re releasing a series of features to improve pricing and optimize gas cost of swaps:

- An updated Auto Router that finds the best price across Uniswap v2 + v3 while optimizing for gas prices
- Auto Router support for Uniswap Protocol on Layer 2 Networks
- Real-time gas estimates on your swap
- Smarter auto slippage

We’re also releasing the full Auto Router to the community as a convenient npm package and sharing new developer tools:

- Auto Router npm package
- Atomic swap + add liquidity
- Oracle-based slippage

The updated Auto Router improves trade prices even further by routing trades across both Uniswap v2 and v3 pools. It also finds the best price across all Uniswap protocols, and optimizes gas costs in the process, so you never have to worry about which version you’re using.

In addition, starting today the Auto Router supports all of the Uniswap Protocol’s Layer 2 networks: Optimistic Ethereum and Arbitrum. The combination of highly efficient trade pricing of the Auto Router with the low gas costs of a Layer 2 network, delivers a cheaper trading experience than ever before.

To help you make informed decisions about gas costs, we’re also excited to announce gas cost estimates in the Uniswap App. You will now see a USD estimate of the gas fee before submitting a swap, so you can wait for the right moment to trade.

Finally, we’re releasing two new capabilities for Uniswap developers. The first is called ‘Swap-and-add liquidity’ which allows you to provide liquidity with one asset instead of two by automatically swapping to the right ratio. The second is slippage limits relative to v3’s time-weighted-average-price feeds.

## Gas Aware Route Splitting Across v2 and v3

In September, we [launched](https://uniswap.org/blog/auto-router) the Auto Router, a smart order routing algorithm that splits trades across multiple Uniswap v3 pools while accounting for gas costs.

The Auto Router has been a major win for Uniswap v3 users: our analysis shows that the Auto Router improves pricing for 13.97% of all trades and 36.84% of trades between the Top 10 tokens by TVL.

While Uniswap v3 has grown to over $3b in daily trade, Uniswap v2 remains a large liquidity venue on Ethereum, with over $700m in volume.

The Auto Router now splits trades across both v2 and v3 liquidity pools to find the best price across both these industry-leading protocols. Additionally, trades on v2 can be split across up to seven paths to take advantage of liquidity depth in different pools. The Auto Router is also gas-aware and will only take an extra hop or split if it results in a better net rate for you.

In the example below, the new Auto Router finds a +0.64% better price quote by splitting the trade across both Uniswap v2 and v3 liquidity.

![auto-router-v2-split-1](//images.ctfassets.net/oc3ca6rftwdu/5iQ4aDAz4uJ5XV5ArFxn3W/092feae2b3fb48440d60a37e9bf95ad8/split-1.png)

These improvements are made possible by a new SwapRouter contract which will require new ERC-20 token approvals. In order to save gas fees, the app will compare the older router price to the new router price, and only use the new router if it offers a better price.

By default, the App uses a Uniswap Labs hosted instance of the Auto Router to efficiently compute your route with low latency. For those who wish to remove this dependency, you can disable the Auto Router API in settings to compute your route locally in the browser, with slightly higher latency.

## Layer 2 Network Support

The Auto Router is now available on all networks where Uniswap Protocol is deployed: Optimistic Ethereum and Arbitrum. This makes trading on these networks even more efficient than before.

## Real Time Gas Estimates

Gas prices have increased over the past few months and knowing the right time to submit a transaction can be difficult. We’re excited to launch an estimated gas cost feature, allowing you to monitor the true cost of a swap in real time directly from the App interface.

![auto-router-v2-trade](//images.ctfassets.net/oc3ca6rftwdu/4TC9XB7oRgSBWpEY6JqVao/25756a986c284f1266e1c4d936c78059/trade-gif.gif)

## Smarter Auto Slippage

We’re using these gas estimates to get smarter about slippage, too. Historically, the App has defaulted to 0.5% slippage because in many cases you’re better off re-submitting a transaction that fails due to high slippage. But if you’re trading smaller amounts, high gas fees often make resubmission too costly.

The Uniswap App will now automatically set slippage based on your expected gas cost and trade size. For smaller trades, the App will adjust slippage tolerance to improve the chance of the transaction succeeding. As always, you can manually set your slippage limits in the App settings.

# For Developers

## Auto Router npm Package

The above improvements are made possible by the open-source Auto Router. In order to help more developers take advantage of these capabilities, we are today launching an npm package to quickly import the Auto Router in your project. Read this [developer guide](https://docs.uniswap.org/contracts/v2/reference/smart-contracts/router-02) to get started with the [@uniswap/smart-order-router](https://www.npmjs.com/package/@uniswap/smart-order-router) package.

## SwapRouter02.sol Contract

The new SwapRouter02.sol contract has been [deployed](https://etherscan.io/address/0x68b3465833fb72A70ecDF485E0e4C7bD8665Fc45) and is fully [open source](https://github.com/Uniswap/swap-router-contracts/blob/main/contracts/SwapRouter02.sol). Check out the code on [GitHub](https://github.com/Uniswap/swap-router-contracts).

## Swap and Add

The new router contract now offers an atomic ‘swap-and-add’ function that makes it possible to provide liquidity with only one of the asset’s in the pool, or any ratio of the two assets.

In order to add liquidity to a Uniswap v3 pool, the user or contract must provide two assets in a particular ratio. In many cases, the user only holds a single asset or an arbitrary ratio of the two assets. This means you often have some tokens left over after adding liquidity. A simple approach is to submit a swap transaction to reach the optimal ratio and then submit an add liquidity transaction -- but your swap (and other transactions in between) will have changed the optimal ratio!

The new SwapRouter makes it possible to swap and then add liquidity in a single atomic transaction. The smart-order-router npm package even includes a function to compute the optimal ratio and transaction calldata. Check out this new [developer guide](https://docs.uniswap.org/contracts/v2/reference/smart-contracts/router-02) to learn how to swap-and-add in your project today.

This is available to developers today and coming soon to the Uniswap App.

## Oracle Slippage

The new router also allows you to limit the relative price impact of trades as measured against v3 oracles, not just the current state of on-chain liquidity. For example, a user swapping ETH for USDC could specify that their swap can only execute within one percentage point of the five minute ETH/USDC time-weighted average price. This mitigates MEV and sandwich attacks for safe, automated, permissionless trading. Check out the [OracleSlippage.sol](https://github.com/Uniswap/swap-router-contracts/blob/main/contracts/base/OracleSlippage.sol) contract for more detail.

We’re excited for you to enjoy smarter swaps in the Uniswap App and to hear about your experience using the new features.

---

To get involved and stay up to date:

- Join the Uniswap community [discord](https://discord.com/invite/FCfyBSbCU5)
- Follow Uniswap Labs on [Twitter](https://twitter.com/Uniswap)
- Subscribe to the Uniswap Labs [blog](https://uniswap.org/rss.xml)
- Register as a delegate on [Sybil](https://sybil.org/#/delegates/uniswap)
- Participate in Uniswap [governance](https://gov.uniswap.org/)

Uniswap Team 🦄

Auto Router V2: Better Pricing with support for Uniswap V2, Layer 2 Networks, and Gas Estimates

Auto Router V2

Today, we are excited to share some recent features and improvements to the Uniswap ecosystem:

- Layer 2 Beta (Improved UX!)
- Developer Guides
- Help Center
- EIP-1559 Support
- ENS on Sybil

# Layer 2 Beta

The Uniswap v3 deployments on Optimistic Ethereum and Arbitrum are ready to graduate from Alpha to Beta.

We’re excited to release the network selector dropdown in the Uniswap App! Starting with today’s Beta release, users can seamlessly access all supported networks directly in the Uniswap App.

![product-update-2-network-selector](//images.ctfassets.net/oc3ca6rftwdu/11OGK7VXKLxs3cMqArbHJY/9d12fcecea90e7c72d520ed33d46d080/network_selector.gif)

We’ve also released a fast confirmation UX to showcase the lightning speed of Layer 2 networks!

![product-update-2-fast-confirmation](//images.ctfassets.net/oc3ca6rftwdu/5eopT7KJU5ThNdXy3UT50T/45ed26c657bfdf00382a75b1905c6894/fast_confirmation.gif)

Lastly, as a precautionary measure, we’ve implemented downtime detection so the Uniswap App will report liveness of the network.

![product-update-2-downtime-alert](//images.ctfassets.net/oc3ca6rftwdu/tIgcKZ73qIJGyXOfnqCe5/f68d76d34acb4b99a2c08bc9e8faae2b/downtime_alert.png)

The early successes of Optimistic Ethereum and Arbitrum have been incredibly promising. We’re excited to offer a better experience in the Uniswap App and hope it will invite more users to experiment with L2 networks.

**Optimistic Ethereum** - Since launching Uniswap v3 on [Optimistic Ethereum](https://uniswap.org/blog/uniswap-optimism-alpha/) two months ago, total value locked ([TVL](https://info.uniswap.org/#/optimism/)) has steadily grown to $35M. Over the past 30 days alone, 49,000 unique addresses have generated $165m volume across 158k trades, regularly saving up to 25x on swap costs relative to L1!

We want to highlight that the Optimistic Ethereum network will undergo a [‘Regenesis’](https://medium.com/ethereum-optimism/the-future-of-optimistic-ethereum-7f22d987331). Both Uniswap Labs and the Optimism team will provide further reminders and notices as we get closer to the Regenesis event.

**Arbitrum** - Uniswap v3 was deployed on Arbitrum on [June 2](https://github.com/Uniswap/uniswap-interface/pull/1716) following a community [snapshot](https://snapshot.org/#/uniswap/proposal/Qmehop1NNWP9VEf7tGLEAYRphVsXtdxkL7oKEhaXL2Xao6) vote. The network [officially opened](https://uniswap.org/blog/uniswap-arbitrum-alpha/) to the public on August 31 and adoption has quickly soared: over the past two weeks, the Arbitrum deployment has seen over $345M [trade volume](https://info.uniswap.org/#/arbitrum/) on $39M [TVL](https://info.uniswap.org/#/optimism/)!

Although user funds were never at risk, the Arbitrum sequencer [experienced 45 minutes of downtime](https://medium.com/offchainlabs/arbitrum-one-outage-report-d365b24d49c) on September 14. We want to remind users that further outages are still possible as the Arbitrum network continues to find its feet. Nevertheless, we believe that the limited extent and severity of issues to date warrants cautiously moving the Uniswap v3 deployment to Beta status.

# Developer Guides

We are committed to educating developers and making the Uniswap protocol more accessible to all with informative developer docs and guides.

To that end, we have published six new developer guides:

- Smart Contract Guides
  - [How to Swap](https://docs.uniswap.org/protocol/guides/swaps/single-swaps)
  - [How to Provide Liquidity](https://docs.uniswap.org/protocol/guides/providing-liquidity/setting-up)
  - [How to Create a Liquidity Mining program](https://docs.uniswap.org/contracts/v3/guides/liquidity-mining/overview)
- Javascript SDK Guides
  - [How to Swap](https://docs.uniswap.org/sdk/v3/guides/routing)
  - [How to Provide Liquidity](https://docs.uniswap.org/sdk/guides/liquidity/minting)
  - [How to Fetch Spot Prices](https://docs.uniswap.org/sdk/v3/guides/quoting)

We’ll continue publishing docs on a weekly basis so stay tuned for more!

# Help Center

We are steadily expanding the Uniswap [Help Center](https://help.uniswap.org/en/) to offer more walkthroughs and FAQs.

Recently we published a complete set of guides to walk you through every step from deposit to withdrawal on Layer 2 [Optimistic Ethereum](https://support.uniswap.org/hc/en-us/sections/8664727545229-Optimism) and [Arbitrum User Guides](https://support.uniswap.org/hc/en-us/sections/8664651554445-Arbitrum). We’ve also added an article about [Swap Error Codes](https://support.uniswap.org/hc/en-us/articles/7421987762829-Swap-errors-Advanced-).

# EIP-1559 Support

Ethereum upgraded to EIP-1559 last month and we’re happy to say that it is fully compatible with the Uniswap app. The app now sends a type 2 transaction to nudge your wallet to choose the optimal Base Fee and Priority Fee for your transaction.

Since the EIP-1559 launch, 43,577 ETH has been burned by transactions interacting with the Uniswap Protocol.

# ENS on Sybil

We’ve added Ethereum Name Service (ENS) support to [sybil.org](https://sybil.org)! If an address is not Twitter verified, Sybil will now fetch their ENS name to help you identify the delegate.

---

To get involved and stay up to date:

- Join the Uniswap community [discord](https://discord.com/invite/FCfyBSbCU5)
- Follow Uniswap Labs on [Twitter](https://twitter.com/Uniswap)
- Subscribe to the Uniswap Labs [blog](https://uniswap.org/rss.xml)
- Register as a delegate on [Sybil](https://sybil.org/#/delegates/uniswap)
- Participate in Uniswap [governance](https://gov.uniswap.org/)

Uniswap Team
🦄

Uniswap Product Update #2

Today we’re excited to announce the release of our new Auto Router! The Auto Router uses an advanced smart order routing algorithm to find better prices for traders in the [Uniswap app](http://app.uniswap.org). This includes:

- **Split routes** which execute trades across multiple pools at once
- **More powerful algorithm **that considers a larger data set for larger trades and better prices
- **Gas cost awareness **ensures every added step is net positive for your trade

Lastly, if there is a better trade available on Uniswap v2 after accounting for gas costs, the Auto Router will automatically switch to v2.

# Split Routes

One way that the Auto Router achieves better prices is by splitting trades across multiple pools. In the legacy router, a trade was always executed through a single route. Now, your trade can be split across up to seven paths to take advantage of liquidity depth in different pools. In the example below, the trader saves \$134,689 by splitting the route on a COMP:USDC trade. This is more than enough to cover the additional gas cost of the second route.

The addition of multiple fee tiers in Uniswap v3 makes this feature more important than ever.

![Auto-router-split-routes](//images.ctfassets.net/oc3ca6rftwdu/45rRN6ivRIKQMIfguLTq1V/f7bc9b4559d4bf20be49475be3ad9eb5/split_routes.png)_The Auto Router optimizes your price by splitting the route across multiple pools._

# More powerful algorithm

The Auto Router enables efficient execution, especially on large trades. At the time of writing this, without the Auto Router an 80M USDT:USDC swap would incur a price impact of -62.9%. With the Auto Router, the same trade can be executed with a price impact as low as -0.749%.

![auto-router-explore](//images.ctfassets.net/oc3ca6rftwdu/oqZDSmviBQOqY14kQa4B9/60714c6757cca93fd09d076da31b5f9a/explore.png)

_The Auto Router explores liquidity at greater depth than the standard router which previously ran out of gas._

# Gas Cost Awareness

The Auto Router factors in gas costs to optimize your effective price. With today’s launch, smaller trades will execute more efficiently by minimizing the number of gas-intensive hops to reach the output token. For example, this ETH:LINK trade saves \$8 in gas fees to deliver a 10% better net price by removing a hop from the route.

![auto-router-gas](//images.ctfassets.net/oc3ca6rftwdu/5CMBfQ6ttOb3xXtPzu4UEF/9d9ed6469b0d0c9775dd69026cd36a36/gas.png)

_The Auto Router is aware of gas costs and will only take an extra hop if it yields a better effective price._

# Auto Router Interface

The Auto Router is now live and enabled by default for all users in the Uniswap App. You can hover over the Auto Router icon to peak into your trade route.

![auto-router-demo](//images.ctfassets.net/oc3ca6rftwdu/6yT4eFYGhei5outTqLW16N/40c44fdb839d41fcd30a1be1b325c12f/demo.gif)

You may disable the Auto Router in settings if you do not wish to use the Auto Router for any reason.

# Open Source Code

We are deeply committed to decentralized and open-source financial infrastructure. In that spirit, we have published the full Auto Router source code under the GPL license.

- [@uniswap/routing-api](https://github.com/Uniswap/routing-api): Wraps and deploys the smart-order-router as a hosted service.
- [@uniswap/smart-order-router](https://github.com/Uniswap/smart-order-router): Contains the logic for finding the most efficient way to swap token A for token B, considering split swaps across multiple routes and gas costs.

# Developers

The Uniswap App fetches quotes from an instance of the Auto Router hosted by Uniswap Labs. Local developers and IPFS builds will be able to call the Auto Router API up to a modest request limit. The app will fallback to legacy routing when the request limit is exceeded, and in any situation where the Auto Router fails to return a quote. If your app needs to handle a higher load, you are welcome to deploy your own instance of the Auto Router from the open source code.

We will host a Twitch livestream over the coming weeks to walk through the Auto Router codebase and teach developers how to work with it.

# Measuring Improvements

In our analysis of 4,429 on-chain swaps from June 1, the Auto Router improves pricing on 13.97% of all trades and 36.84% of trades between the Top 10 tokens by TVL.

Benefits are spread across all trade size buckets. Many low value trades benefit from the Auto Router’s awareness of gas costs, allowing it to recommend fewer hops for better overall execution. For larger trades, price improvements are primarily driven by the Auto Router’s new route splitting capabilities and ability to explore more liquidity.

![auto-router-performance](//images.ctfassets.net/oc3ca6rftwdu/3jTJai05lW9cKDDjOZdLv/d6715d13e7d2bdf6f17b6bf9d5dfbdfb/performance.png)

_The Auto Router improves trades of all sizes _

# Future work

Our journey has only just begun! We will continue iteratively improving the Auto Router to unlock better trade prices for users of the Uniswap App. The next release will support splitting routes across Uniswap v2 and v3 simultaneously and we also plan to support routes on Optimistic Ethereum and Arbitrum.

Additionally, we intend to further decentralize the Auto Router for the Uniswap Community by publishing a client-side version of the Auto Router.

For now, enjoy improved prices in the Uniswap App!

---

To get involved and stay up to date:

- Join the Uniswap community [discord](https://discord.com/invite/FCfyBSbCU5)
- Follow Uniswap Labs on [Twitter](https://twitter.com/Uniswap)
- Subscribe to the Uniswap Labs [blog](https://uniswap.org/rss.xml)
- Register as a delegate on [Sybil](https://sybil.org/#/delegates/uniswap)
- Participate in Uniswap [governance](https://gov.uniswap.org/)

Uniswap Team 🦄

Introducing the Auto Router, an advanced smart order routing algorithm to find better prices for traders in the Uniswap app.

Introducing the Auto Router

Uniswap Labs — a software development studio that contributes to the Uniswap Protocol — is proud to play a part in creating a better, more equitable financial system. One of Uniswap Labs’ contributions is the portal it provides at app.uniswap.org — an open source interface — for reliable, trustworthy interaction with the Uniswap Protocol.

To continue to innovate and provide this tool for the Uniswap community, we monitor the evolving regulatory landscape. Today, consistent with actions taken by other DeFi interfaces, we have taken the decision to restrict access to certain tokens through app.uniswap.org. These tokens have always represented a very small portion of overall volume on the Uniswap Protocol — a full list is available [here](https://github.com/Uniswap/uniswap-interface/tree/main/src/constants/tokenLists/unsupported.tokenlist.json).

Importantly, the Uniswap Protocol — unlike the interface — is a set of autonomous, decentralized, and immutable smart contracts. It provides unrestricted access to anyone with an Internet connection. Similarly, this action has no impact on the Uniswap Interface code, which remains open source, or the many other portals or locally run instances used to access the Uniswap Protocol.

Moving forward, we will continue to develop products and contribute to the Uniswap Protocol, in a way that is consistent with the broader DeFi industry’s values — to provide safe, transparent, and robust financial infrastructure that can empower users around the world.

A quick note on token access on app.uniswap.org

Token Access on app.uniswap.org

Over the past few weeks, our team has spoken with dozens of traders,
LPs, developers and community members to learn about their experiences
interacting with Uniswap.

Going forward, we want to share regular updates with the community. This post marks the first in a series highlighting product developments that improve the overall user experience.

Today, we are excited to announce the release of six new features and improvements:

- Auto Fee Tier Selection

- Liquidity Range Charts

- Create Proposal UI

- 30 Language Translations and crowdsourcing tool

- Uniswap Help Center

- Docs improvements and new landing page

# Auto Fee Tier Selection

In our conversation with liquidity providers, many expressed uncertainty when selecting their fee tier. Which fee tier is optimal? Why not always pick the highest one?

To help LPs select the right fee tier, the app now automatically
defaults to the fee tier with the most liquidity. This method leverages the wisdom of the market to suggest a reasonable fee tier for most LP strategies. LPs can always manually select fee tiers by clicking the ‘edit’ button to reveal additional fee tiers and their respective liquidity allocation percentages.

![lp1](//images.ctfassets.net/oc3ca6rftwdu/n2r62mrqcPu97Ge6jywxk/4382978bed41573156f89e8d5199e9b0/lp1.gif)

*The 0.30% fee tier is auto-selected because it holds 82% of liquidity across all v3 ETH-USDC pairs.*

Fee tier selection is nuanced and in certain scenarios an LP may choose a tier with lower TVL (e.g. ETH/DAI 0.05%). That said, we believe TVL is a good heuristic for the average user.

Alongside the Uniswap community, the Uniswap Labs team will continue to monitor the efficacy of this metric and we welcome additional feedback.

# Liquidity Range Charts

Uniswap v3 introduces the concept of Concentrated Liquidity — a major
improvement from previous AMM designs, LPs can now selectively allocate their liquidity between minimum and maximum price ranges, earning a higher percentage of trading fees with less capital in the process.

In our user research interviews, we heard users rely on alternative
tools and charts to select their price ranges. Many users flipped back
and forth between the Uniswap App and Uniswap Info to view the liquidity distribution for a pair.

As of today, the LP interface will display the real-time distribution of liquidity in the selected pool, providing insight into the aggregate market’s opinion as to how liquidity should be best allocated. LPs can use the range sliders to adjust their minimum and maximum prices alongside the pre-existing manual input fields.

![](/images/posts/product-update-1/lp2.gif)

*Liquidity in the ETH-USDC 0.30% pair is increasingly more concentrated around the mid-price.*

We hope that this data visualization will help users understand the concept of a price range and quickly select a range that fits their risk preferences. For more guidance, check out this [How To Guide](https://help.uniswap.org/en/articles/5391541-providing-liquidity-on-uniswap-v3).

# Create Proposal

Uniswap’s governance system requires participants to submit executable code alongside their written proposal. To date, this has limited the number of potential proposal participants to those that are intimately familiar with the inner workings of Solidity.

Now that the proposal threshold has been reduced from 10m UNI to 2.5m
delegated UNI, we believe it is especially important that non-technical
delegates can actively participate in proposal submission.

We have now introduced the addition of a ‘Create Proposal’ feature in
the governance interface. Users can select a proposed action (Transfer,
Approve), a target address, and a target asset to accompany their
proposal text.

![](/images/posts/product-update-1/create.gif)

Over the coming weeks we will introduce additional actions including:
updating the ENS; updating the v3 license, and creating liquidity mining
programs and more.

# Translations

![](/images/posts/product-update-1/translate.gif)

The Uniswap Protocol is global financial infrastructure, serving users
from all around the world.

To better support our international user base, the Uniswap Interface now
includes over 30 languages. The default language is set according to
your browser’s language settings, but this can be changed manually
through the dropdown menu.

If you would like to contribute to translation quality, please visit the
[_Crowdin Uniswap translations
hub_](https://crowdin.com/project/uniswap-interface). Anyone can improve
the translations by making an account on Crowdin and submitting changes.
You can also start translations for new languages that may not be
currently supported on the interface.

# Help Center

![](/images/posts/product-update-1/help.png)

This week we launched the [_Uniswap Help
Center_](https://help.uniswap.org/) to address common questions and
issues that affect our users. We’ve also published a number of How To
guides, starting with an [_Optimism
collection_](https://help.uniswap.org/en/collections/3033942-layer-2) to
accompany the protocol’s recent launch on Layer 2.

We’ll continue adding new content on an ongoing basis and warmly welcome
suggested topics from the community. We will also soon offer direct
access to the Help Center through the application.

# Docs

![](/images/posts/product-update-1/docs.png)

Uniswap Docs has received a fresh coat of paint!

Users can now view and search through documentation and contracts across
all three protocols in one consolidated venue. We have also added
further technical guides around the
[_Swap_](https://docs.uniswap.org/protocol/guides/swaps/single-swaps)
and [_Flash
Swap_](https://docs.uniswap.org/protocol/guides/flash-integrations/inheritance-constructors)
functions in v3.

V3 Add Liquidity and SDK guides are coming very soon!

# Community Feedback

We are beyond grateful for our engaged community members, who are
consistently willing to volunteer time and provide feedback to improve
our products.

The feature updates released today, alongside upcoming updates, are the
direct result of numerous user conversations: a very special shoutout to
[_Rizzle_](http://twitter.com/nftland), Mark Jeffrey,
[_Epheph_](http://www.twitter.com/epheph), [_Haye
Chan_](http://twitter.com/defiahab), Drew Korn, Alex Komorav, Cyrus
Ansari, [_Will Price_](https://twitter.com/will__price), Wario, reuptake
and the [_LP cafe discord_](https://discord.gg/UKm6BzkJ).

We want to keep hearing from you! As always, the Uniswap Labs team can
be found in the community [_discord_](https://discord.gg/FCfyBSbCU5) and
on Twitter. If you are willing to volunteer 15 minutes for a user
feedback session, please fill in [_this
form_](https://forms.gle/3gZ6NVQSATHoqz7MA) and we will be in contact as
soon as possible.

---

To get involved and stay up to date:

- Join the Uniswap community [discord](https://discord.gg/FCfyBSbCU5)
- Follow Uniswap on [Twitter](https://twitter.com/Uniswap)
- Subscribe to the Uniswap [blog](/blog)
- Register as a delegate [Sybil](http://sybil.org/)
- Participate in [Uniswap governance](http://gov.uniswap.org/)

Uniswap Team
🦄

A quick overview of some recent product improvements from the past few weeks.

Uniswap Product Update #1

As the Ethereum ecosystem continues to evolve, we continue to see exponential growth in the number of ERC20 tokens being issued. This maturation reflects the success of permissionless innovation, a trend we expect will only accelerate in the future: everything of value will be tokenized.

As the rate of token issuance accelerates, it has become increasingly difficult for users to filter out high quality, legitimate tokens from scams, fakes, and duplicates. Across the space, projects are managing and maintaining rapidly growing token lists. The end result is a lot of wasted time, slow listing processes and scammed users. In addition, builders should spend their time building, not deciding which tokens are legitimate and which are scams, fakes or duplicates.

Today, we are excited to announce [Token Lists](https://tokenlists.org/), a new standard for creating lists of ERC20 tokens. This is a community-led initiative to improve discoverability and trust in ERC20 token lists in a manner that is inclusive, transparent, and decentralized.

Token Lists follow a standard JSON schema and can be hosted publicly on ENS, IPFS, and HTTPS.

The initial launch includes:

- An ERC20 token list standard
- A homepage and list browser at [tokenlists.org](https://tokenlists.org/)
- A community forum at [community.tokenlists.org](https://community.tokenlists.org/)
- Lists from [CoinMarketCap](https://coinmarketcap.com/), [Coingecko](https://www.coingecko.com/en), [Dharma](https://www.dharma.io/), [Zerion](https://zerion.io/), [Kleros TCR](https://kleros.io/), [Defiprime](https://defiprime.com/), [Compound](https://compound.finance/), [Aave](https://aave.com/), [Synthetix](https://synthetix.exchange/#/), [UMA](https://umaproject.org/), [1inch](https://1inch.exchange/#/), and [Roll](https://tryroll.com/) (and many more coming soon!)

Token Lists can be used **right now** in the [Uniswap Interface](https://app.uniswap.org/#/swap), removing the need for a default list.

This is another step forward in interface decentralization. Read Uniswap Interface + IPFS to learn how the Uniswap interface is now hosted by the community in a decentralized manner.

We hope to continue iterating and improving Token Lists in collaboration with the broader community.

## Gatekeeping is Dead

In the legacy financial system, the concept of “listing” is incredibly meaningful. Gatekeepers manage lists of assets on a discretionary basis. Without listing, the utility of an asset is severely diminished. Unlisted assets often can’t be transferred, traded or used in any other capacity. For all intents and purposes, “unlisted assets” do not exist.

In the Ethereum-based decentralized financial system, the concept of “listing” loses its meaning. Anyone can create a new ERC20 token and transfer it to anyone else, and it will be publicly recorded on the Ethereum blockchain.

Since all tokens use a standard interface, infrastructure-layer applications, such as wallets, analytics sites, and DeFi protocols (like Uniswap) can immediately recognize and interact with new ERC20 tokens from the moment they are deployed.

Adding a new ERC20 token to the Uniswap protocol is as simple as calling a public function on a permissionless and immutable smart contract. In fact, about **100 new Uniswap V2 liquidity pools are deployed every day**, with over 6,000 pools added since it launched in May 2020.

![image1](//images.ctfassets.net/oc3ca6rftwdu/ajDGdBn9lyDva0lJRoA5F/b11287b7946286e7c065c79f78a22257/image1.png)

## Decoupling Discovery + Reputation from Gatekeeping

While gatekeepers often stifle innovation, they also serve to filter out low quality assets that users don’t want or need.

As we move towards mass tokenization, this process of filtering and curation becomes more important than ever before for Ethereum-based projects. The alternative is a UX nightmare, with users having to verify the legitimacy of assets on an ad hoc basis.

As the decentralized finance movement continues to remove gatekeepers, it is imperative that new systems for discovery and reputation do not devolve into centralized gatekeeping.

## Current Approaches

A naive approach to ERC20 token lists is automatically displaying every asset. While this is maximally decentralized, it opens up the door for phishing, scams, and presents users with way too many options.

Another naive approach is creating a decentralized governance system as a gatekeeper, with the hope that this governance system will be fairer than the gatekeepers that came before it.

Most projects opt for the easiest and most practical solution: maintaining a list supported by their own reputation.

## Long Live Token Lists

Token Lists leverages Ethereum’s greatest strengths - its numerous high quality projects and communities, their ability to share public infrastructure, and the ease of interoperability between them.

The idea is simple - any project on Ethereum that maintains a list of ERC20 tokens hosts this list publicly following a standard JSON schema. Projects attach their reputation to lists by hosting them on a domain they control.

Some examples:

- A list is hosted on test.cmc.eth, an ENS domain controlled by CoinMarketCap
- A list is hosted on Coingecko.com, which is controlled by CoinGecko
- A list is hosted on t2crtokens.eth, which is controlled by a Kleros TCR using a decentralised governance process

Lists can also be project or category specific. For example:

- A personal tokens list by Roll
- A list of all Synthetix synths
- A list of all UMA synths

Since lists are publicly hosted and follow a standard format, they can be decoupled from individual interfaces and instead be combined and shared across projects. For example, an interface could automatically display any tokens that are on at least m out of n reputable lists. Or it could display all tokens across a set of lists, but display trust scores based on the number lists an asset is on. Or it can build in a list explorer that allows any user to import the lists that they want to trust.

Another critical advantage of lists is the speed at which new assets can be discovered and used. If a new asset is released by a reputable project, the project can simply update their own list and any interface (or aggregate list maintainer) subscribed to that list can automatically import it in real time.

To help spur adoption of Token Lists and provide a high quality reference example, we have deprecated the old Uniswap interface “default list”, and replaced it with a list explorer and importing mechanism.

We have also partnered with a number of reputable projects in the space who were excited to create and maintain lists of their own. More than 10 lists are already available on [tokenlists.org](https://tokenlists.org/) and more are in progress.

## Get involved with Token Lists

We imagine Token Lists emerging as foundational infrastructure for the Ethereum ecosystem to self-govern reputation around tokens and are excited to see lists used in other projects.

To get involved:

- [Create a token list](https://github.com/uniswap/token-lists#authoring-token-lists)
- [Discuss token lists in the community forum](https://community.tokenlists.org/)
- Integrate Token Lists into your project
- Develop tooling or dashboards or help improve the dashboard we created
- Generate hype on crypto twitter

Special thanks to [Denis Nazarov](https://twitter.com/Iiterature) and [Jesse Walden](https://twitter.com/jessewldn) for their help on this blogpost.

Introducing Token Lists

# TL;DR

- In an effort to continue decentralizing, we have created a mechanism for the community to host the Uniswap Interface
- The open-source [Uniswap Interface](https://github.com/Uniswap/uniswap-interface) built by our team and
  community is [automatically deployed](https://github.com/Uniswap/uniswap-interface/releases) daily to IPFS
- Community members can pin the IPFS hashes to ensure availability
- We use IPNS + DNSLink to point `/ipns/app.uniswap.org` to the latest [IPFS release](https://github.com/Uniswap/uniswap-interface/releases)
- [app.uniswap.org](https://app.uniswap.org) is now served exclusively from the latest
  [IPFS release](https://github.com/Uniswap/uniswap-interface/releases), however any IPFS gateway can be used directly
- The URL [uniswap.exchange](https://uniswap.exchange) now forwards to [app.uniswap.org](https://app.uniswap.org)
- The ENS contenthash for `uniswap.eth` now points to the latest IPFS release allowing the URL [uniswap.eth.link](https://uniswap.eth.link/) to be used

## Interfaces and decentralization

The Uniswap **protocol** is trustless and decentralized because it lives entirely on-chain.

Anyone running an Ethereum node can interact with the contracts directly which will perform as programmed for as long as Ethereum exists.

However, not everyone wants to run a node. Instead, many users choose to interact with Uniswap through web interfaces, trade aggregators, wallets, or other DAPPs that have integrated Uniswap natively in their smart contracts.

When using an interface, users should verify the transactions they sign match the transaction presented by the interface.

However, it is not always easy to do this. This is why it is important to use reputable interfaces.

We're thrilled to see a growing ecosystem of high-quality interfaces for Uniswap, including Argent, 1inch, Rainbow, Paraswap, Zerion, Instadapp, and many more.

Open source interfaces (including many of the above) allow users to verify the code they are interacting with does what it claims. If a user runs the code locally, they can make transactions with confidence. However, as soon as the code is hosted, **it is difficult for users to verify the website they are interacting has not been modified**.

This is one of the problem that IPFS [aims to solve](https://blog.cloudflare.com/e2e-integrity/).

## What we did

Our team has always cared about decentralization, security, and accessibility. This is why we built an [open-source interface](https://github.com/Uniswap/uniswap-interface) for Uniswap that the community can directly run, verify and build upon. We’ve just taken another step forward by decentralizing the hosting of the Uniswap Interface using IPFS.

Using [GitHub Actions](https://github.com/features/actions), the [Uniswap Interface](https://github.com/Uniswap/uniswap-interface) is now deployed at least once per day to IPFS. Each release is automatically [pinned](https://docs.ipfs.io/concepts/persistence/) using [pinata.cloud](https://pinata.cloud), a free IPFS pinning service.

The IPFS releases can be found [on GitHub](https://github.com/Uniswap/uniswap-interface/releases).

This means the Uniswap Interface can now be accessed via IPFS directly, through a gateway such as [cloudflare-ipfs.com](https://cloudflare-ipfs.com/ipns/app.uniswap.org/), or by an _alias_ to the Cloudflare gateway at [app.uniswap.org](https://app.uniswap.org).

The domain [uniswap.exchange](https://uniswap.exchange/) is now redirected to [app.uniswap.org](https://app.uniswap.org/), which is an alias to the Cloudflare IPFS gateway that serves the Uniswap Interface from IPFS.

## How we did it

The `app.uniswap.org` subdomain is given a CNAME record pointing at `cloudflare-ipfs.com`.

When a user visits the domain `app.uniswap.org`, the browser first looks up the DNS record and finds a CNAME to `cloudflare-ipfs.com`. The server at `cloudflare-ipfs.com`, i.e. Cloudflare’s IPFS gateway, looks up the [DNSLink record](https://docs.ipfs.io/concepts/dnslink/) for the subdomain.

That TXT record contains the IPFS hash of the latest release.

Cloudflare’s IPFS gateway then fetches the content using the IPFS protocol and serves the interface to your browser via HTTPS.

## Some changes

Because IPFS gateways will not default to serving `/index.html` as is expected by many single page applications, the Uniswap Interface uses a "hash" based router.

This means that links that contain paths, such as [app.uniswap.org/swap](https://app.uniswap.org) will no longer work, but [app.uniswap.org/#/pool](https://app.uniswap.org/#/swap) will work.

## Security Unicorn

Some settings on the Uniswap Interface use localstorage, which is shared across users in some IPFS gateways.

When using an IPFS gateway and referencing an IPFS hash or IPNS name by the _path_ (e.g. [cloudflare-ipfs.com/ipfs/QmdJApBwfsGua9v.../](https://cloudflare-ipfs.com/ipfs/QmdJApBwfsGua9vKnMbswGFGA4y5Kj2VNNPhvcsc8NC7iA/)) rather than the _subdomain_ (e.g. [bafybeig6hsm....cf-ipfs.com](https://bafybeig6hsm6lj74ertjf7hghsj2zrkzzpec5iyrt57vxiwxqltmgeeokm.cf-ipfs.com/)), other sites accessed from the same IPFS gateway can view and change your settings in the Uniswap Interface.

To avoid this possibility, you can use the subdomain format of IPFS gateway URLs, which are contained in [every release](https://github.com/Uniswap/uniswap-interface/releases) along with the path format.

## Verifying a build

You can check what build you are being served from Cloudflare's IPFS gateway by looking at your browser's network console for the response headers sent directly from Cloudflare's IPFS gateway.

Cloudflare's gateway uses the IPFS hash of the deployment in the `etag` header, and reports the resolved IPNS path in the `x-ipfs-path` header.

![verifying-build](//images.ctfassets.net/oc3ca6rftwdu/7zGBjnnFm9YOKptS1gti8w/1f53550e376629701328bb99a0d8f710/verifying-build.png)

## How you can help

To keep the Uniswap Interface available, you can pin the hash of the [latest release](https://github.com/Uniswap/uniswap-interface/releases/latest).

If this sort of work sounds cool to you, we're hiring! [Shoot us a message!](mailto:contact@uniswap.org)

The Uniswap Interface is now served exclusively from IPFS

Uniswap Interface + IPFS


We’re improving wallet support on [app.uniswap.org](https://app.uniswap.org/swap). To start we’ve added support for:

- [WalletConnect](https://walletconnect.org/)

- [WalletLink](https://www.walletlink.org/#/) (Coinbase Wallet)

- [Portis](https://www.portis.io/)

- [Fortmatic](https://fortmatic.com/)

- Mobile deep linking for [Trust Wallet](https://trustwallet.com/)

You can also now dynamically switch between wallets through the account modal, which is opened by clicking on your account at the top-right hand of the screen.

# WalletConnect

![](https://cdn-images-1.medium.com/max/2342/1*7Jkmgn-WeF8qdzJDd4sGsg.png)

WalletConnect allows mobile wallets to connect to your desktop browser through a QR code and sign transactions. It even works on browsers such as Safari!

Adding WalletConnect support allows wallets such as [Rainbow Wallet](https://rainbow.me/), [Gnosis Safe](https://safe.gnosis.io/) and [Argent Wallet](https://www.argent.xyz/) (coming soon) to connect to Uniswap for the first time. MetaMask mobile and Trust Wallet can also be used with wallet connect.

![Scan a QR code to connect your mobile wallet to app.uniswap.org](https://cdn-images-1.medium.com/max/1920/1*8A9MDGkWmQnPi8g0LtVndA.gif)

# WalletLink

WalletLink functions similar to WalletConnect, using a QR code to connect your mobile Coinbase Wallet to any browser. It only needs to be linked once to work across all dApps that support it.

# Portis

Portis allows users to sign into their wallet with a username / password combination in a pop-up window. They support 2FA and provide a fiat on-ramp through Wyre.

# Fortmatic

Fortmatic allows users to sign into their wallet through traditional methods like email and phone in a pop-up window. They support 2FA and allow custom styling for sites that integrate.

# web3-react@6

This is all built on the new v6.0 release of the [web3-react library](https://github.com/NoahZinsmeister/web3-react) built by our very own [Noah Zinsmeister](https://twitter.com/NoahZinsmeister). This release features many improvements including improved connector logic and a monorepo with dynamic imports to get your bundle sizes down. This enables us to provide great UX for seamlessly switching between wallet providers.

---

Do you use another wallet that’s not supported yet? [Let us know.](http://contact@uniswap.org)

Happy Holidays from the Uniswap team!

❤

The Uniswap interface now supports a wide range of connection types including Wallet Connect!

Better Wallet Support


We’re excited to release a new and improved [Uniswap.info](http://uniswap.info/) with more detailed information about the Uniswap ecosystem and token exchanges. For this release we focused providing more complete and accurate data, better UI/UX and the ability to buy and sell tokens with the Uniswap iframe integration.

Keep reading below for a breakdown of the new features.

---

# Overview Page

![](https://cdn-images-1.medium.com/max/1900/1*hLD1rKF9GHBZZTevW1YZsg.gif)

We’ve built a new overview page with high level data about exchanges on Uniswap. Detailed stats like 24 hour volume, total liquidity and daily transactions are now available at a glance. We’ve also listed the top exchanges sortable by price, volume, liquidity and more to help you explore different aspects of the most active pools.

# Exchange Pages

![](https://cdn-images-1.medium.com/max/6208/1*CJuUyxt3cbBh3WIsPqHdFg.png)

We’ve updated the design to give you a better overview of the exchange price and performance including 24 hour stats in USD and ETH. The chart view has been improved and shows historical liquidity, volume and price across across a number of timeframes.

We now show a sortable and filterable list of of all transactions in the last 24 hours as well.

# Buy any token using Uniswap.info

![](https://cdn-images-1.medium.com/max/1900/1*keV-2_v_vCp-V7m_WTvVrQ.gif)

Using a [app.uniswap.org](http://app.uniswap.org) iFrame integration, you can now directly buy and sell any token from the exchange info page. If you are a hardcore DAI trader you might consider bookmarking this page for a one stop shop for data, analytics and trading.

Uniswap.info automatically shows all tokens on the Uniswap protocol as long as there is at least 0.1 ETH in liquidity. This means it can be used to trade tokens that are not shown on the default list of app.uniswap.org. We highly recommend you verify the address of any tokens traded.

_If you’re interested in doing something similar on your site, you can [read more](https://uniswap.org/docs/v2/interface-integration/iframe-integration/) about how to embed app.uniswap.org)_

# Linking

Analytics for a specific pool can be linked to directly using the token's address, like [Dai's](https://info.uniswap.org/#/tokens/0x6b175474e89094c44da98b954eedeac495271d0f).

# Data!

The updated Uniswap.info was built using data from [The Graph](https://thegraph.com/). We’ve worked closely with [The Graph](https://thegraph.com/) team to upgrade the [Uniswap subgraph](https://thegraph.com/explorer/subgraph/graphprotocol/uniswap) to support for better views, historical data and transactions. We’ve added historical data for Uniswap as a whole with daily volumes and liquidity over time.

_If you are building a uniswap data tool you may consider building off [the new subgraph.](https://github.com/graphprotocol/uniswap-subgraph)_

# UI and UX polish

Along with a fresh coat of paint, we’ve updated the UI to better support denser data views and a consistent layout that flexes smoothly to a mobile view. All the prices denominated in ETH can now be swapped for USD with a toggle in the top right and we’ve cleaned up the units across the site.

The charts are now easier to read and have a tab view to switch between data and each token page will now extract a color from the token to apply a unique style.

![](https://cdn-images-1.medium.com/max/9312/1*r-W2LsxkkKEubO1P-V9bNQ.jpeg)

# Upcoming Features

We’ve got a lot planned for this site in the future…

- Liquidity Provider specific pages and support

- Data around holdings, ROI, etc

- Data export (CSV)

- Top LPs

- Top performing pools

- Live data for transactions and prices

- More statistics, rankings, insights

- Exchange health statistics

If you have any ideas for things you’d like to see that isn’t on this list we’d love to hear [feedback](https://forms.gle/G2QWdCWnaaQYJboR7).

---

If you are looking for more Uniswap analytics tools check out [https://github.com/Uniswap/universe](https://github.com/Uniswap/universe) for a list of tools.

You can check out the repo on [github](https://github.com/Uniswap/uniswap-info) if you’d like to explore how everything works.

A new and improved Uniswap.info with more detailed information about the Uniswap ecosystem and token pools.