# @across-protocol/sdk > Across is a system that quickly moves tokens across chains. This repository contains shareable code and libraries for Across. Latest version **4.4.22** (published 2026-09-21) · AGPL-3.0 license · 0 weekly downloads ## Install ```sh npm install @across-protocol/sdk pnpm add @across-protocol/sdk yarn add @across-protocol/sdk bun add @across-protocol/sdk ``` ## Health **Score 75/100 (B)** — status: active. Positive: has types; esm support; no vulnerabilities; has provenance; recently updated; high maintenance score; high quality score. Warnings: low downloads; large bundle. ## Facts | | | |---|---| | Version | 4.4.22 | | Published | 2026-09-21 | | First published | 2024-05-31 | | Weekly downloads | 0 | | License | AGPL-3.0 | | TypeScript types | bundled | | Module format | ESM + CommonJS | | Node | >=22.18.0 | | Dependencies | 24 | | Unpacked size | 55.5 MB | | Known vulnerabilities | 0 | | Install scripts | no | | Provenance | attested (GitHub Actions) | | Author | UMA Team | | Maintainers | chrismaree, mrice32, nicholaspai, evaldofelipe | ## Links - npm: https://www.npmjs.com/package/@across-protocol/sdk - Repository: https://github.com/across-protocol/sdk - Homepage: https://docs.across.to/reference/sdk - Issues: https://github.com/across-protocol/sdk/issues - npm.io page: https://npm.io/package/@across-protocol/sdk ## Dependencies (24) - [bs58](https://npm.io/package/bs58.md) ^6.0.0 - [viem](https://npm.io/package/viem.md) ^2.56.3 - [async](https://npm.io/package/async.md) ^3.2.5 - [tslib](https://npm.io/package/tslib.md) ^2.6.2 - [ethers](https://npm.io/package/ethers.md) ^5.7.2 - [lodash](https://npm.io/package/lodash.md) ^4.18.1 - [arweave](https://npm.io/package/arweave.md) ^1.14.4 - [tronweb](https://npm.io/package/tronweb.md) ^6.2.2 - [winston](https://npm.io/package/winston.md) ^3.17.0 - [decimal.js](https://npm.io/package/decimal.js.md) ^10.3.1 - [@solana/kit](https://npm.io/package/@solana/kit.md) ^8.3.0 - [superstruct](https://npm.io/package/superstruct.md) ^1.0.3 - [@coral-xyz/anchor](https://npm.io/package/@coral-xyz/anchor.md) ^0.30.1 - [@eth-optimism/sdk](https://npm.io/package/@eth-optimism/sdk.md) ^3.3.1 - [winston-transport](https://npm.io/package/winston-transport.md) ^4.9.0 - [@nktkas/hyperliquid](https://npm.io/package/@nktkas/hyperliquid.md) ^0.25.9 - [@uma/contracts-node](https://npm.io/package/@uma/contracts-node.md) ^0.4.0 - [@solana-program/token](https://npm.io/package/@solana-program/token.md) ^0.16.1 - [@solana-program/system](https://npm.io/package/@solana-program/system.md) ^0.14.1 - [@ethersproject/bignumber](https://npm.io/package/@ethersproject/bignumber.md) ^5.7.0 - [@across-protocol/constants](https://npm.io/package/@across-protocol/constants.md) ^3.1.126 - [@across-protocol/contracts](https://npm.io/package/@across-protocol/contracts.md) 5.0.26 - [@solana-program/token-2022](https://npm.io/package/@solana-program/token-2022.md) ^0.17.0 - [@solana-program/compute-budget](https://npm.io/package/@solana-program/compute-budget.md) ^0.18.1 ## Recent versions - 4.4.22 (latest) — 2026-09-21 - 5.0.0-svm-clients.1 (svm-clients) — 2026-10-16 - 4.4.19-alpha.0 (alpha) — 2026-08-06 - 4.3.165-beta.1 (beta) — 2026-06-03 - 4.1.32-hotfix.1 (hotfix) — 2025-03-28 - 5.0.0-svm-clients.0 — 2026-10-16 - 4.4.21 — 2026-09-16 - 4.4.20 — 2026-09-16 - 4.4.19 — 2026-09-10 - 4.4.18 — 2026-08-06 - 4.4.17 — 2026-08-04 - 4.4.16 — 2026-07-28 - 4.4.15 — 2026-07-23 - 4.4.14 — 2026-07-21 - 4.4.13 — 2026-07-17 - … 527 more at https://npm.io/package/@across-protocol/sdk/versions ## README # Across SDK Across is a system that quickly moves tokens across chains. This repository contains shareable code and libraries for Across. ## Modules | Name | Description | README | Source Code | |---|---|---|---| | **LP Fee Calculator** | Calculate LP fee for transfers | [README](./src/lpFeeCalculator/README.md) | [Source Code](./src/lpFeeCalculator/) | | **Merkle Distributor** | ACX token distribution | [README](./src/merkleDistributor/README.md) | [Source Code](./src/merkleDistributor/) | ## TSDX User Guide **This project was bootstrapped with [tsdx](https://github.com/jaredpalmer/tsdx). Read below for more instructions or check out the [repository](https://github.com/jaredpalmer/tsdx)** Congrats! You just saved yourself hours of work by bootstrapping this project with TSDX. Let’s get you oriented with what’s here and how to use it. > This TSDX setup is meant for developing libraries (not apps!) that can be published to NPM. If you’re looking to build a Node app, you could use `ts-node-dev`, plain `ts-node`, or simple `tsc`. > If you’re new to TypeScript, checkout [this handy cheatsheet](https://devhints.io/typescript) ## Commands TSDX scaffolds your new library inside `/src`. To run TSDX, use: ```bash npm start # or yarn start ``` This builds to `/dist` and runs the project in watch mode so any edits you save inside `src` causes a rebuild to `/dist`. To do a one-off build, use `npm run build` or `yarn build`. To run tests, use `npm test` or `yarn test`. ## Configuration Code quality is set up for you with `prettier`, `husky`, and `lint-staged`. Adjust the respective fields in `package.json` accordingly. ### Jest Jest tests are set up to run with `npm test` or `yarn test`. ### Bundle Analysis [`size-limit`](https://github.com/ai/size-limit) is set up to calculate the real cost of your library with `npm run size` and visualize the bundle with `npm run analyze`. #### Setup Files This is the folder structure we set up for you: ```txt /src index.tsx # EDIT THIS /test blah.test.tsx # EDIT THIS .gitignore package.json README.md # EDIT THIS tsconfig.json ``` ### Rollup TSDX uses [Rollup](https://rollupjs.org) as a bundler and generates multiple rollup configs for various module formats and build settings. See [Optimizations](#optimizations) for details. ### TypeScript `tsconfig.json` is set up to interpret `dom` and `esnext` types, as well as `react` for `jsx`. Adjust according to your needs. ## Continuous Integration ### GitHub Actions Two actions are added by default: - `main` which installs deps w/ cache, lints, tests, and builds on all pushes against a Node and OS matrix - `size` which comments cost comparison of your library on every pull request using [`size-limit`](https://github.com/ai/size-limit) ## Optimizations Please see the main `tsdx` [optimizations docs](https://github.com/palmerhq/tsdx#optimizations). In particular, know that you can take advantage of development-only optimizations: ```js // ./types/index.d.ts declare var __DEV__: boolean; // inside your code... if (__DEV__) { console.log('foo'); } ``` You can also choose to install and use [invariant](https://github.com/palmerhq/tsdx#invariant) and [warning](https://github.com/palmerhq/tsdx#warning) functions. ## Module Formats CJS, ESModules, and UMD module formats are supported. The appropriate paths are configured in `package.json` and `dist/index.js` accordingly. Please report if any issues are found. ## Named Exports Per Palmer Group guidelines, [always use named exports.](https://github.com/palmerhq/typescript#exports) Code split inside your React app instead of your React library. ## Including Styles There are many ways to ship styles, including with CSS-in-JS. TSDX has no opinion on this, configure how you like. For vanilla CSS, you can include it at the root directory and add it to the `files` section in your `package.json`, so that it can be imported separately by your users and run through their bundler's loader. ## Publishing a new version 1. Bump version in package.json and merge to master. Example: https://github.com/across-protocol/sdk/pull/67 2. Create a new release with a new tag (version number should be incremented): https://github.com/across-protocol/sdk/releases 3. Update any upstream repos/binaries that depend on the sdk such as https://github.com/across-protocol/frontend. Example: https://github.com/across-protocol/frontend/pull/202 --- _Source: https://npm.io/package/@across-protocol/sdk · Machine-readable twin of the npm.io package page. Health data is recomputed on every publish._