Convenience package for discovering and buying assets with Ether.

Usage no npm install needed!

<script type="module">
  import 0xprojectAssetBuyer from 'https://cdn.skypack.dev/@0xproject/asset-buyer';



Warning: In Beta, has not been extensively tested.

Convenience package for buying assets represented on the Ethereum blockchain using 0x. In its simplest form, the package helps in the usage of the 0x forwarder contract, which allows users to execute Wrapped Ether based 0x orders without having to set allowances, wrap Ether or own ZRX, meaning they can buy tokens with Ether alone. Given some liquidity (0x signed orders), it helps estimate the Ether cost of buying a certain asset (giving a range) and then buying that asset.

In its more advanced and useful form, it integrates with the Standard Relayer API and takes care of sourcing liquidity for you given an SRA compliant endpoint. The final result is a library that tells you what assets are available, provides an Ether based quote for any asset desired, and allows you to buy that asset using Ether alone.


yarn add @0xproject/asset-buyer


import { AssetBuyer } from '@0xproject/asset-buyer';


var AssetBuyer = require('@0xproject/asset-buyer').AssetBuyer;

If your project is in TypeScript, add the following to your tsconfig.json:

"compilerOptions": {
    "typeRoots": ["node_modules/@0xproject/typescript-typings/types", "node_modules/@types"],


We welcome improvements and fixes from the wider community! To report bugs within this package, please create an issue in this repository.

Please read our contribution guidelines before getting started.

Install dependencies

If you don't have yarn workspaces enabled (Yarn < v1.0) - enable them:

yarn config set workspaces-experimental true

Then install dependencies

yarn install


To build this package and all other monorepo packages that it depends on, run the following from the monorepo root directory:

PKG=@0xproject/asset-buyer yarn build

Or continuously rebuild on change:

PKG=@0xproject/asset-buyer yarn watch


yarn clean


yarn lint

Run Tests

yarn test