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<h1 class="fw-extrabold fs-xl fs-lg-3xl mb-sm mb-lg-lg text-gray-04">Core uniswap. Core/Helper Architecture.</h1>
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<div class="fw-semibold">Core uniswap Uniswap V2 Core are the essential Uniswap V2 smart contracts, consisting of:. This guide assumes you are familiar with our Minting a Position guide. 30%; tickSpacing is the granularity of the pool. LPFeeLibrary. For example, the beforeSwap function Any contract that calls IUniswapV3PoolActions#flash must implement this interface Uniswap v4 introduces a set of powerful, interconnected features that proposes a new way automated market makers (AMMs) can function. Uniswap users can now swap on World Chain with Uniswap Web and Wallet, and provide liquidity on v2 or v3. Periphery contracts interact with one or more core contracts but are not themselves part Uniswap v4 is a new automated market maker protocol that provides extensible and customizable pools. Position. The latest version of @uniswap/v3-core, @uniswap/v3-periphery, and @uniswap/swap-router-contracts are deployed at the addresses listed below. This ensures consistent pool identification regardless of the order in which tokens are provided. uniswap-v3-core; uniswap-v3-sdk; uniswap-v3-periphery; Deployment addresses; Ecosystem. , a single tick. org/wiki/Q(numberformat) Then install the Uniswap v4-core and v4-periphery contracts as dependencies: forge install Uniswap/v4-core && forge install Uniswap/v4-periphery Copy. Given a currency address, returns the protocol fees accrued in that currency Uniswap Contract Deployments. It is designed to efficiently store and manipulate these balance deltas, with the upper 128 bits representing the change in token0 (amount0) and the lower 128 bits representing the change in token1 (amount1). isPercent • Readonly isPercent: true This boolean prevents a fraction from being interpreted as a Percent TickBitmap. tickLower: Lower tick boundary of the position; tickUpper: Upper tick boundary of the position; liquidityDelta: Amount of Name Type Description; midPrice: Price<TBase, TQuote>: mid price before the trade: inputAmount: CurrencyAmount<TBase>: the input amount of the trade: outputAmount: CurrencyAmount<TQuote>: the output amount of the trade This means (among other things) that Governance has the power to associate arbitrary text with any subdomain of the form X. All files in contracts/interfaces/ are licensed under GPL-2. Index signature . Start using @uniswap/v3-core in your project by running `npm i @uniswap/v3-core`. This is made possible with If the Uniswap market price is far enough above or below this external price, the following example contains code that calculates the amount to trade over Uniswap for maximum profit: ExampleSwapToPrice. Concentrated Liquidity. It utilizes the extsload function, which is an external wrapper for the SLOAD opcode. Uniswap v2 is a new implementation based on the same formula, with several new highly-desirable features. Hook Deployment Hook Flags . This allows for efficient reading of arbitrary storage slots. Through notification logic, position owners do not need to risk their liquidity position and its underlying assets. All interactions on the contract that account deltas require unlocking. this function is virtual so that we can override it during testing, which allows us to deploy an implementation to any address and then etch the For this guide, the following Uniswap packages are used: @uniswap/v3-sdk; @uniswap/sdk-core; The core code of this guide can be found in trading. A library for handling binary fixed point numbers, see https://en. After being unlocked, any number of operations can be executed, which at the end of must be locked again. Clone the repository made from v4-template Gets the next sqrt price given a delta of token0. Positions store additional state for tracking fees owed to the position Important Notes. TickMath. Home; App; Analytics; Token Lists; Brand Assets; Community. A Uniswap pool facilitates swapping and automated market making between any two assets that strictly conform to the ERC20 specification Name Type Description; sqrtPriceX96: uint160: The initial sqrt price of the pool, as a Q64. Functions FullMath. 1% (1000 pips) Increasing these values could lead to overflow in Pool. The caller of this method must be checked to be a UniswapV3Pool deployed by the canonical UniswapV3Factory. The currency0 and currency1 fields are always sorted numerically, with currency0 being the lower value. Contains methods for working with a mapping from tick to 32 bit timestamp values, specifically seconds spent outside the tick. @uniswap/v3-sdk; @uniswap/sdk-core; @uniswap/smart-order-router; The core code of this guide can be found in swapAndAddLiquidity(). 0001, i. sqrt(1. . beforeSwap - corresponds to a certain flag. ProtocolFeeLibrary. Library of helper functions for a pools LP fee. 0. 0-or-later (as indicated in their SPDX headers), Uniswap v4 Deployments. November 26, 2024. Returns the cumulative tick and liquidity as of each timestamp secondsAgo from the current block timestamp. ADDRESS_ZERO as currency0. The new design is intended to support liquidity mining, additional rewards given to in-range liquidity providers. The hook contract is specified when creating a new pool in the PoolManager. Defined in . Unlock Callback & Deltas Refresher . For users looking to interact with the canonical Uniswap v4 PositionManager, v4-periphery is a required dependency. Uniswap V2 is a binary smart contract system. web3-react consists of many packages, each providing different functionalities. Please refer to this post for the Metal L2 Application for Canonical Uniswap V3 Deployment. ts:21. The specific type of swap (exact input or exact output) will be determined by the V4Router actions we encode later. The other price must have the same base currency as this price's quote currency TickBitmap. org/wiki/Q(numberformat) Name Type Description; from: address: The account from which the tokens were sent, i. 🦄 🦄 Core smart contracts of Uniswap V2. There are some cases, where the fee revenue can entirely "pay" for a liquidity increase, and remainder tokens need to be collected. The strucuture is similar to the quoting config, but we also have the option to Uniswap Contract Deployments. PoolKey uniquely identifies a pool. Learn how to integrate with Uniswap by building a dApp through guided examples. Parses bytes returned from hooks and the byte selector used to check return selectors from hooks. This parameter is enforced per tick to prevent liquidity from overflowing a uint128 at any point, and also prevents out-of-range liquidity from being used to prevent adding in-range liquidity to a pool LowGasSafeMath. swap call - typically a swap router; key The key for the pool IUniswapV3PoolDeployer. ERC-6909 is a minimal and gas-efficient standard for managing multiple ERC-20 tokens from a single contract. Please be aware the deployments may not be up to date with the latest changes. symbol • Optional Readonly symbol: string The symbol of the currency, i. For the latest deployments, please see the foundry artifacts. uniswap. Uniswap uses an automated market maker mechanism to provide instant feedback on Uniswap Contract Deployments. Handles "phantom overflow" i. Note: This comparison is based on the numerical value of the addresses and does not imply any inherent ordering or Find out how to participate in Uniswap Labs’ $15. Structure used to modify liquidity in a pool. It takes a storage slot as input. It is specifically designed to handle the return value of the beforeSwap hook and to be compatible with the afterSwap hook. @uniswap/sdk-core / Exports / Fraction Uniswap v4 inherits all of the capital efficiency gains of Uniswap v3, but provides flexibility via hooks and gas optimizations across the entire lifecycle. ts. 1), see LICENSE. A minted position is required to add or remove liquidity from, so the buttons will be disabled until a position is minted. 1 Introduction Uniswap v1 is an on-chain system of smart contracts on the Ethereum blockchain, imple- @uniswap/sdk-core / Exports / NativeCurrency. eth, and Additional Use Grants should be specified at v3-core-license-grants. At this point, if there are any non-zero deltas, meaning the PoolManager is owed or owes tokens back to some afterSwap Parameters . IPoolManager. Next, set up the remappings so that the shorthand syntax for importing contracts from the dependencies work nicely: ERC-6909. ; The tickSpacing field determines the granularity of Hooks are optional for Uniswap V4 pools. To interact with web3-react we recommend installing though npm: Name Type Description; recipient: address: The account that will receive the amount transferred: amount: uint256: The number of tokens to send from the sender to the recipient _etherCache Static Private _etherCache: Object = {}. The primary license for Uniswap V3 Core is the Business Source License 1. @uniswap/v3-sdk; @uniswap/sdk-core; @uniswap/v3-periphery; The code mentioned in this guide can be found across the minting Position, collecting Fees, modifying positions and swap and add liquidity examples. Before explaining BeforeSwapDelta in detail, it is worth noting that in the context of Uniswap V4 swaps: Today, we’re excited to launch a $15. Contains methods for computing the result of a swap within a single tick price range, i. It tightly packs the two values in a single 256 bits. unlockCallback(data), where they interact with @uniswap/sdk-core / Exports / CurrencyAmount. Note this does not consider aggregation, as routes are linear. Lower values are more precise but may be more expensive to trade on; hookContract is the unlock . PoolManager checks that the pool is initialized before calling IPoolManager. In Uniswap v4, fee revenue is automatically credited to a position on increasing liquidity. Use v4-template, which has pre-configured dependencies and tests for Uniswap v4. @uniswap/sdk-core / Exports / Token. The Uniswap v2 core contracts are non-upgradeable by de-sign, so Uniswap v3 is implemented as an entirely new set of contracts, available here. State Variables protocolFeesAccrued . For native token pairs (Ether), use CurrencyLibrary. validateHookAddress . Swaps in Uniswap are different from trades on traditional platforms. [chainId: number]: Ether. The fee field can represent either a static fee or indicate that the pool uses a dynamic fee mechanism. The mapping uses int16 for keys since ticks are represented as int24 and there are 256 (2^8) values per word. Corresponds to pools[poolId]. multiply multiply<TOtherQuote>(other): Price<TBase, TOtherQuote> Multiply the price by another price, returning a new price. The Uniswap development suite Uniswap offers several SDKs that work together and enable you to easily interact with the Uniswap protocol The most important SDKs are: sdk-core: The core of the Uniswap SDKs, defines classes and types shared across all the SDKs; v2-sdk: An SDK to interact with the Uniswap V2 protocol. sender after minting liquidity to a position from IUniswapV3Pool#mint. > Return the next tick that is initialized If the Uniswap pool does not receive enough DAI to cover the ETH withdrawn, then the entire transaction will revert; thus, all ERC20 tokens are returned or paid for at the end of the transaction. log base 1. Functions multicall . Periphery contracts interact with one or 🦄 Core smart contracts of Uniswap V3. Installation . Computes sqrt price for ticks of size 1. This library handles operations related to reserves, delta counts, and locking state, which are essential for the efficient and secure operation of the Uniswap V4 protocol. Integrators should no longer assume that they are The Uniswap Core SDK. sol. 96 numbers. swap Name Type Description; positionManager: contract INonfungiblePositionManager: The position manager for which to describe the token: tokenId: uint256: The ID of the token for which to produce a description, which may not be valid @uniswap/sdk-core / Exports / NativeCurrencyName 2. Wraps Uniswap V3 positions in a non-fungible token interface which allows for them to be transferred and authorized. Functions owner The StateLibrary is a crucial component in Uniswap v4 for reading pool state. Supports prices between 2-128 and 2128. entities/ether. Using a wallet extension Like in the previous guide, our example uses a config file to configurate the inputs used. These also include storing core constants such as definitions for tokens, ABI's, and blockchain addresses that can distract from the core concepts. It is used throughout the Uniswap SDKs, such as the V3 SDK. We recommend taking a look at the Technical Name Type Description; _liquidity: bytes32: The amount of liquidity in the position, feeGrowthInside0LastX128: uint256: fee growth of token0 inside the tick range as of the last mint/burn/poke, Called to msg. When triggering the beforeAddLiquidity hook function, there are some parameters we can make use of to customize or extend the behavior of modifyLiquidity. note. Core/Helper Architecture. 3000 = 0. sender). Uniswap Contract Deployments. Effect changes to a position in a pool. This SDK is not Uniswap V2 is a binary smart contract system. When triggering the afterSwap hook function, there are some parameters we can make use of to customize or extend the behavior of swap. Encode actions . 1, last published: a year ago. World Chain is Now Live on Uniswap. An lp fee of exactly 0b1000000 signals a dynamic fee pool. While this approach provided flexibility, it also led to increased gas costs for pool creation and multi-hop swaps. In Uniswap v2, liquidity is distributed evenly along an x*y=k price curve, with assets reserved for all prices between 0 and infinity. The balances resolved above is what we refer as the delta , a field held in the transient state. Info) The mapping containing all tick information for initialized ticks: tickLower: int24: The lower tick boundary of the position Subscribers. These parameters are described in beforeAddLiquidity from IHooks. fromFractionalAmount Static fromFractionalAmount<T>(currency, numerator, denominator): CurrencyAmount<T> Construct a currency amount with a denominator that is not equal to 1 This exchange aligns incentives such that Ekubo, Inc. Most signi cantly, it enables the creation of arbitrary ERC20/ERC20 pairs, The Uniswap Core SDK provides abstractions for other SDKs to use in a Typescript/Javascript environment. Functions @uniswap/sdk-core / Exports / Percent. It reads the value stored in that slot directly, using SLOAD, from the contract's storage. Integrators should no longer assume that they are deployed to the same addresses across chains and be extremely careful to confirm mappings below. 96: tick: int24: The initial tick of the pool, i. Parameters: Multicall_v4. As mentioned in Concept of Hooks, hook contracts indicate their implemented functions by encoding its behavior in the address of the contract. Git Source - Generated with forge doc. Learn about the core concepts of the Uniswap Protocol, Swaps, Pools, Concentrated Liquidity and more. Custom accounting, hook fees, custom curves, and return deltas might seem like distinct concepts, The Uniswap v2 core contracts are non-upgradeable by de-sign, so Uniswap v3 is implemented as an entirely new set of contracts, available here. a short textual non-unique identifier beforeAddLiquidity Parameters . Get Slot0 of the pool: sqrtPriceX96, tick, protocolFee, lpFee. A contract that constructs a pool must implement this to pass arguments to the pool. Uniswap does not use an order book to represent liquidity or determine prices. Trade at External Venue Once we've obtained our temporary capital of 1 ETH from Uniswap, we now can trade this for 220 DAI on Oasis. Facilitates multiplication and division that can have overflow of an intermediate value without any loss of precision. The core package exposes the methods used to interact with web3 connectors, the types package declares useful types, while the others are installed to enable interactions with different connectors. sender for the add liquidity call; key The INonfungiblePositionManager. Modifications of the Change Date should be specified at v3-core-license-date. BalanceDelta is a type used in Uniswap V4 to represent the balance changes of two tokens (token0 and token1). This representation allows for precise price calculations across a wide range of values while using The TransientStateLibrary is a crucial component of Uniswap V4, providing utility functions for managing transient state in the PoolManager contract. This example demonstrates a complete implementation of a volatility-based dynamic fee hook for Uniswap v4, incorporating all key components and functions. Name Type Description; x: uint256: the value for which to compute the most significant bit, must be greater than 0 TransferHelper. e. , allows multiplication and division where an intermediate value overflows 256 bits LiquidityAmounts. Here, we're using V4_SWAP, which tells the Universal Router that we want to perform a swap on a Uniswap v4 pool. #Protocols. v4-core hosts the core pool logic for creating pools and executing pool actions like Uniswap v3 is a noncustodial automated market maker imple-mented for the Ethereum Virtual Machine. Inherits: IMulticall_v4 Enables calling multiple methods in a single call to the contract. Name Type Description; chainId: number: BaseCurrency#chainId: address: string: The contract address on the chain on which this token lives The contract address of the Uniswap V3 factory: token0: address: The first token of the pool by address sort order: token1: address: The second token of the pool by address sort order: fee: uint24: The fee collected upon every swap in the pool, denominated in hundredths of a bip: tickSpacing: int24: The spacing between usable ticks How Uniswap works. Setup. We expect developers to think of new and interesting ways to build Extension to IERC20 that includes token metadata. The Uniswap V3 Factory facilitates creation of Uniswap V3 pools and control over the protocol fees. 96 and liquidity to compute deltas. As is the case with all canonical v3 deployments, this deployment will be subject to Ethereum Layer 1 Uniswap Uniswap Ethereum Contract Deployments. Oracle. Functions computeSwapStep Git Source - Generated with forge doc Uniswap Contract Deployments. Welcome to the V3 Core SDK! The Uniswap Core SDK provides abstractions for other SDKs to use in a Typescript/Javascript environment. Today, we’re excited to launch a $15. Inherits: IProtocolFees, Owned Contract handling the setting and accrual of protocol fees. Integrators should no longer assume that they @uniswap/sdk-core; @uniswap/smart-order-router; The core code of this guide can be found in routing. Functions add Adds liquidity for the given recipient/tickLower/tickUpper position. IUniswapV3Pool. BeforeSwapDelta. Uniswap v4 is the latest evolution of the Uniswap Protocol, transforming it into a developer platform, unlocking new market structures and more assets to serve more users. A brief overview of the parameters: sender The initial msg. Contains helper methods for interacting with ERC20 tokens that do not consistently return true/false. Latest version: 1. library of functions related to protocol fees. In the implementation you must pay the pool tokens owed for the swap. Always rounds up, because in the exact output case (increasing price) we need to move the price at least far enough to get the desired output amount, and in the exact input case (decreasing price) we need to move the price less in order to not send too much output. Otherwise, claim Licensing. Instances of stored oracle data, "observations", are collected in the oracle array Every pool is initialized with an oracle array length of 1. Validates the deployed hook address agrees with the expected permissions of the hook. BeforeSwapDelta is a custom type used in Uniswap V4 hook contracts to represent balance changes during swap operations. Unichain Sepolia: 1301 nextInitializedTickWithinOneWord nextInitializedTickWithinOneWord(tick, lte, tickSpacing): Promise<[number, boolean]. parseSelector also is used to parse the expected selector For parsing hook returns, note that all hooks return either bytes4 or (bytes4, 32-byte-delta) or (bytes4, 32-byte-delta, uint24). Uniswap is open-source software licensed under the GPL. State Variables MAX_PROTOCOL_FEE . amount0Delta and amount1Delta can both be 0 if no tokens were swapped. Called to msg. Edit this page. These parameters are described in afterSwap from IHooks. Info: The mapping containing all user positions: liquidityDelta: int128: The change in pool liquidity as a result of the position update Returns the cumulative tick and liquidity as of each timestamp secondsAgo from the current block timestamp. Git Source - Generated with forge doc All core Uniswap V3 contracts are deployed and will be subject to Ethereum Layer 1 Uniswap Protocol governance and control. 1 (BUSL-1. The LiquidityAmounts library provides functions for computing liquidity amounts from token amounts and prices in Uniswap V4. Uniswap v4 is NOT live on a production environment yet. The config, which we will use in some code snippets in this guides has this structure: import {Token} from '@uniswap/sdk-core' @uniswap/sdk-core / Exports / TradeType ParseBytes. To collect fees, the following operations are required: decrease liquidity - collect fees from the core contract; take pair - transfer the fee revenue, as both tokens, to a recipient IHooks. g. Name Type Description; self: mapping(int24 => struct Tick. Accessors wrapped • get wrapped(): Token Return the wrapped version of this currency that can be used with the Uniswap contracts. To get a time weighted average tick or liquidity-in-range, you must call this with two values, one representing the beginning of The maximum amount of position liquidity that can use any tick in the range. The mapping uses int24 for keys since ticks are represented as int24 and there are 8 (2^3) values per word. If increasing the liquidity requires the transfer of both tokens: settle pair - pays a pair of tokens, to increase liquidity A library for handling binary fixed point numbers, see https://en. State Variables DYNAMIC_FEE_FLAG . Integrate with Uniswap. This SDK is not expected to be used in isolation, but only as part of other SDKs. Currencies should be sorted, uint160(currency0) < uint160(currency1); lpFee is the fee expressed in pips, i. 0001^tick) as fixed point Q64. In Uniswap V3, each liquidity pool was represented by a separate smart contract deployed through the UniswapV3Factory contract. After returning execution context back to PoolManager, the core contract checks that balances are resolved - nothing is owed to or from the PoolManager. Inherits: IProtocolFees, IERC6909Claims, IExtsload, IExttload Interface for the PoolManager. It is used throughout the Uniswap SDKs, such as the V3 SDK . The exported functionality from these files is intended to be the minimum needed for each example and not a complete library for production usage. Hooks. 0-or-later (as indicated in their SPDX headers), see contracts/interfaces/LICENSE; Several files in contracts/libraries/ are licensed under GPL-2. 0001 of the starting price of the pool SqrtPriceMath. To get a time weighted average tick or liquidity-in-range, you must call this with two values, one representing the beginning of the period and another for the end of the period. Core contracts provide fundamental safety guarantees for all parties interacting with Uniswap. Uniswap v4’s core logic, like v3, is non-upgradeable. It obviates the need for trusted intermediaries, prioritizing decentralization, censorship resistance, and security. the balance increased Add a signed liquidity delta to liquidity and revert if it overflows or underflows. Type Description; uint8: number of decimal places the token has What is Uniswap. Name Type Description; self: struct Position. SecondsOutside. Prerequisites To understand what Positions are, we need to understand some underlying concepts of the Uniswap protocol. A caller that calls unlock must implement IUnlockCallback(msg. The Uniswap v3 core contracts are also non-upgradeable, with some parameters controlled by governance as described in Section 4. In comparison to earlier versions of the protocol, Uniswap v3 provides increased Uniswap V3 is a binary smart contract system comprised of many libraries, which together make the Core and Periphery. Key Concept: sqrtPriceX96. modifyLiquidity . Contribute to Uniswap/v2-core development by creating an account on GitHub. Similar to the above method but instead targets a fixed output amount given a list of pairs, and a fixed amount out, returns the top maxNumResults trades that go from an input token to an output token amount, making at most maxHops hops. Functions unlock . Positions represent an owner address' liquidity between a lower and upper tick boundary. Uniswap v4 uses ERC-6909 to further improve gas-efficiency on token claims and redemptions. 5 million bug bounty program for identifying critical bugs in Uniswap v4. Exceptions. This is used to avoid having constructor arguments in the pool contract, which results in the init code hash of the pool being constant allowing the CREATE2 address of the pool to be cheaply computed on-chain In Uniswap v4, fee revenue is automatically debited to a position on decreasing liquidity. V4 decides whether to invoke specific hooks by inspecting the least significant bits of the address that the hooks contract is deployed to. How extsload works:. Contains the math that uses square root of price as a Q64. , by primarily focusing its efforts on Ekubo protocol and secondarily sharing improvements with Uniswap protocol, is a core contributor to Uniswap. While each pool can use its own hook smart contract, hooks can be limited to only specific permissions determined at pool creation. sender after executing a swap via IUniswapV3Pool#swap. We’ve created sample hook contracts to start to understand the current framework here. Currently, developing with Uniswap v4 requires foundry. Functions safeTransfer Returns true if the underlying address of currency is numerically greater than the underlying address of other, false otherwise. slot0 IUniswapV3Factory. Helpful? Previous Functions getSlot0 . If decreasing the liquidity requires the transfer of both tokens: take pair - receives a pair of tokens, to decrease liquidity; Otherwise: clear or take - if the token amount to-be-collected is below a threshold, opt to forfeit the dust. Each hook function e. ModifyLiquidityParams. Quickstart . It exposes the core swap lifecycle operations. sqrtPriceX96 represents the square root of the price ratio of token1 to token0, multiplied by 2^96. For a deeper technical overview check out the Uniswap v3 Core whitepaper, the Uniswap v3 Core smart contracts. The caller of this method receives a callback in the form of IUniswapV3MintCallback#uniswapV3MintCallback in which they must pay any token0 or token1 owed for the liquidity. 5M bug bounty, the largest in history, for vulnerabilities found in Uniswap v4 core and periphery contracts. eth. As we saw earlier, we encode this as a single byte, which is how the Universal Router expects to receive commands. Having pool-specific hooks allows for fine-grained control and customization of individual pools. Core Hook Functions Uniswap V4 provides a set of core hook functions that can be implemented by developers. Git Source | Generated with forge doc. the balance decreased: to: address: The account to which the tokens were sent, i. State Variables MAX_SWAP_FEE Name Type Description; z: int256: The casted integer, now type int256 Uniswap Contract Deployments. For most pools, a majority of this liquidity is never put to use. Deployment Details. It provides a SwapMath. In the implementation you must pay the pool tokens owed for the minted liquidity. The PoolManager uses these permissions to determine which hook functions to call for a given pool. The Uniswap smart contracts. Subscribers, new in Uniswap v4, allow for liquidity-position owners to opt-in to a contract that receives notifications. In other words, because of Uniswap’s 20% stake in Ekubo protocol, Ekubo protocol could be considered Uniswap’s outpost on Starknet. The IPoolManager interface defines the main methods for interacting with the Uniswap V4 pool manager contract. initialize function. In order to have access to the liquidity inside the PoolManager, it needs to be unlocked to begin with. Stores a packed mapping of tick index to its initialized state. Max protocol fee is 0. This whitepaper describes the mechanics of Uniswap v2’s \core" contracts including the pair contract that stores liquidity providers’ funds|and the factory contract used to instantiate pair contracts. @uniswap/sdk-core / Exports / Price. bestTradeExactOut . Name Type Description; recipient: address: The address to which collected protocol fees should be sent: amount0Requested: uint128: The maximum amount of token0 to send, can be 0 to collect fees in only token1 to reduce their attack surface. ProtocolFees. Call multiple functions in the current contract and return the data from all of them if they all succeed SwapMath. Contains methods for doing math operations that revert on overflow or underflow for minimal gas cost. However, there are deployments to testnet environments. Provides price and liquidity data useful for a wide variety of system designs. 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