docs: add Ethereum Provider section

site/docs/typescript.md

@@ -188,3 +188,25 @@ The following utilities support type inference when you use const assertions or
 ## Configuring Internal Types
 
 For advanced use-cases, you may want to configure viem's internal types. Most of viem's types relating to ABIs and EIP-712 Typed Data are powered by [ABIType](https://abitype.dev). See ABIType's [documentation](https://abitype.dev/config.html) for more info on how to configure types.
+
+## Ethereum Provider
+
+Importing `viem/window` will type `window.ethereum` as `EIP1193Provider | undefined`, allowing type-safe interactions with the Ethereum provider in the browser. It will be `undefined` in case no browser extension (like MetaMask) is detected. 
+
+
+```ts
+import "viem/window";
+
+if (window.ethereum) {
+  window.ethereum
+    .request({ method: "eth_chainId" })
+    .then((chainId: string) => console.log(`Connected to chain: ${chainId}`))
+    .catch((error: Error) =>
+      console.error(`Error getting chainId: ${error.message}`)
+    );
+} else {
+  console.log("Ethereum provider is not available");
+}
+```
+
+This provides a type-safe interface when using the standard Ethereum [JSON-RPC API](https://ethereum.org/en/developers/docs/apis/json-rpc/) methods.