Detecting the Provider

To detect if a user has already installed Broearn Wallet, a web application should check for the existence of a bw object. Broearn Wallet's browser extension and mobile in-app browser will both inject a bw object into the window of any web application the user visits.

If a bw object exists, Ethereum dApps can interact with Broearn Wallet via the API found at This ethprovider is also made available at window.ethereum but is prone to namespace collisions from other injected wallets.

If Broearn Wallet is not installed, we recommend you redirect your users to our website. Altogether, this may look like the following.

const getProvider = () => {
  if ('bw' in window) {
    const anyWindow: any = window;
    const provider =;
    if (provider) {
      return provider;
  }'', '_blank');

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