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38. Browser Wallet Providers (EIP-1193)

window.ethereum, accountsChanged, and chainChanged.

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Injected wallets expose `window.ethereum` adhering to EIP-1193, using `request({ method, params })` and event emitters for state synchronization.

js
const accounts = await window.ethereum.request({ method: "eth_requestAccounts" });
window.ethereum.on("accountsChanged", (accs) => updateAccount(accs[0]));

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Check your understanding

  1. 1. Which method requests user wallet connection in EIP-1193?

  2. 2. What should an app do on the chainChanged event?

  3. 3. What specification defines the provider JavaScript API?

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