# @sei-js/core > TypeScript library for front end integrations with Sei Latest version **3.2.1** (published 2024-02-01) · MIT license · 0 weekly downloads > **Deprecated.** This package is deprecated. ## Install ```sh npm install @sei-js/core pnpm add @sei-js/core yarn add @sei-js/core bun add @sei-js/core ``` ## Health **Score 10/100 (F)** — status: deprecated. Negative: deprecated. ## Facts | | | |---|---| | Version | 3.2.1 | | Published | 2024-02-01 | | First published | 2022-09-27 | | Weekly downloads | 0 | | License | MIT | | TypeScript types | bundled | | Module format | ESM + CommonJS | | Dependencies | 22 | | Unpacked size | 451.5 KB | | Known vulnerabilities | 0 (+1 in 1 direct dependencies) | | Install scripts | no | | GitHub stars | 67 | | Maintainers | limmingjun, besated, carsonfalcon | | Keywords | sei, javascript, typescript | ## Links - npm: https://www.npmjs.com/package/@sei-js/core - Repository: https://github.com/sei-protocol/sei-js - Homepage: https://github.com/sei-protocol/sei-js#readme - Issues: https://github.com/sei-protocol/sei-js/issues - npm.io page: https://npm.io/package/@sei-js/core ## Dependencies (22) - [bech32](https://npm.io/package/bech32.md) ^2.0.0 - [buffer](https://npm.io/package/buffer.md) ^6.0.3 - [moment](https://npm.io/package/moment.md) ^2.30.1 - [sha.js](https://npm.io/package/sha.js.md) ^2.4.11 - [process](https://npm.io/package/process.md) ^0.11.10 - [xstream](https://npm.io/package/xstream.md) ^11.14.0 - [elliptic](https://npm.io/package/elliptic.md) ^6.5.4 - [@cosmjs/math](https://npm.io/package/@cosmjs/math.md) ^0.29.5 - [@cosmjs/amino](https://npm.io/package/@cosmjs/amino.md) ^0.29.5 - [@cosmjs/utils](https://npm.io/package/@cosmjs/utils.md) ^0.29.5 - [@sei-js/proto](https://npm.io/package/@sei-js/proto.md) ^3.1.0 - [readonly-date](https://npm.io/package/readonly-date.md) ^1.0.0 - [@cosmjs/crypto](https://npm.io/package/@cosmjs/crypto.md) ^0.29.5 - [@cosmjs/encoding](https://npm.io/package/@cosmjs/encoding.md) ^0.29.5 - [@cosmjs/json-rpc](https://npm.io/package/@cosmjs/json-rpc.md) ^0.29.5 - [@cosmjs/stargate](https://npm.io/package/@cosmjs/stargate.md) ^0.29.5 - [@noble/secp256k1](https://npm.io/package/@noble/secp256k1.md) 1.7.1 - [@keplr-wallet/types](https://npm.io/package/@keplr-wallet/types.md) ^0.11.41 - [@cosmjs/proto-signing](https://npm.io/package/@cosmjs/proto-signing.md) ^0.29.5 - [@cosmjs/tendermint-rpc](https://npm.io/package/@cosmjs/tendermint-rpc.md) ^0.29.5 - [@ethersproject/keccak256](https://npm.io/package/@ethersproject/keccak256.md) ^5.7.0 - [@cosmjs/cosmwasm-stargate](https://npm.io/package/@cosmjs/cosmwasm-stargate.md) ^0.29.5 ## Alternatives - [@openai/codex-sdk](https://npm.io/package/@openai/codex-sdk.md) — 731.4K weekly downloads - [babel-plugin-transform-react-jsx](https://npm.io/package/babel-plugin-transform-react-jsx.md) — 565.0K weekly downloads - [babel-helper-remove-or-void](https://npm.io/package/babel-helper-remove-or-void.md) — 508.5K weekly downloads - [@pnpm/store-controller-types](https://npm.io/package/@pnpm/store-controller-types.md) — 186.9K weekly downloads - [react-native-signature-canvas](https://npm.io/package/react-native-signature-canvas.md) — 155.6K weekly downloads ## Recent versions - 3.2.1 (latest) — 2024-02-01 - 0.0.0-internal-20240130201751 (internal) — 2024-01-30 - 0.0.0-beta-20230202171917 (beta) — 2023-02-02 - 1.1.3 (next) — 2023-01-20 - 3.2.0 — 2024-02-01 - 0.0.0-internal-20240130023001 — 2024-01-30 - 0.0.0-internal-20240130021541 — 2024-01-30 - 0.0.0-internal-20240130012423 — 2024-01-30 - 0.0.0-internal-20240130005251 — 2024-01-30 - 3.1.3 — 2024-01-08 - 0.0.0-internal-20240108174901 — 2024-01-08 - 0.0.0-internal-20240105075910 — 2024-01-05 - 0.0.0-internal-20240104185656 — 2024-01-04 - 0.0.0-internal-20240104081628 — 2024-01-04 - 0.0.0-internal-20240103233730 — 2024-01-03 - … 175 more at https://npm.io/package/@sei-js/core/versions ## README # @sei-js/core A library for Sei written in Typescript. ## Installation ```shell yarn add @sei-js/core # or npm install @sei-js/core ``` ## Getting Started ### Connecting to a wallet In order to interact with a Sei node, you'll need a wallet to sign transactions. The wallet extensions that are currently supported can be found in `SUPPORTED_WALLETS`. ```javascript import { connect, SUPPORTED_WALLETS } from '@sei-js/core'; // Connecting to a Keplr wallet const { connectedWallet, offlineSigner } = await connect('keplr', 'atlantic-2'); ``` ### Client #### LCD Query Client The LCD query client can be used to query data via REST endpoints. ```javascript import { getQueryClient } from '@sei-js/core'; const queryClient = await getQueryClient(REST_URL); // Getting the market summary from the Sei dex module queryClient.seiprotocol.seichain.dex.getMarketSummary(params); // Getting user balances from the Cosmos bank module queryClient.cosmos.bank.v1beta1.allBalances({ address }); ``` #### Signing Client The signing client can be used to create, sign, and broadcast transactions. ```javascript import { getSigningClient } from '@sei-js/core'; const client = await getSigningClient({ rpcEndpoint, signer, // OfflineSigner }); ``` #### CosmWasmClient and SigningCosmWasmClient The `SeiSigningCosmWasmClient` and `SeiCosmWasmClient` can be used to interact with CosmWasm smart contracts. Typically, you need the `SeiSigningCosmWasmClient` to execute contract messages and the `SeiCosmWasmClient` to query contract state, though contract states can also be queried using the signing client. ```typescript import { getSigningCosmWasmClient, getCosmWasmClient, connect } from '@sei-js/core'; const cosmWasmClient = await getCosmWasmClient(RPC_URL); const { offlineSigner } = await connect('keplr', 'atlantic-2'); const signingCosmWasmClient = await getSigningCosmWasmClient(RPC_URL, offlineSigner); ``` ## Related packages [@sei-js/react](https://www.npmjs.com/package/@sei-js/react) - A react helper library for common @sei-js/core functions [@sei-js/proto](https://www.npmjs.com/package/@sei-js/proto) - TypeScript library for Sei protobufs generated using Telescope --- _Source: https://npm.io/package/@sei-js/core · Machine-readable twin of the npm.io package page. Health data is recomputed on every publish._