Update check-publickey.md to include web3.js v2 example

content/cookbook/wallets/check-publickey.md

@@ -11,7 +11,36 @@ have a private key associated with them. You can check this by looking to see if
 the public key lies on the ed25519 curve. Only public keys that lie on the curve
 can be controlled by users with wallets.
 
-```javascript file=/code/cookbook/wallets/check-public-key.ts#L1-L2,#L3-L19
+<Tabs groupId="language" items={['web3.js v2', 'web3.js v1']}>
+
+<Tab value="web3.js v2">
+
+```typescript
+import { isAddress } from "@solana/web3.js";
+
+// Note that generateKeyPair() will always give a public key that is valid for users
+
+// Valid public key
+const key = "5oNDL3swdJJF1g9DzJiZ4ynHXgszjAEpUkxVYejchzrY";
+
+// Lies on the ed25519 curve and is suitable for users
+console.log("Valid Address: ", isAddress(key));
+
+// // Valid public key
+const offCurveAddress = "4BJXYkfvg37zEmBbsacZjeQDpTNx91KppxFJxRqrz48e";
+
+// // Not on the ed25519 curve, therefore not suitable for users
+console.log("Valid Off Curve Address: ", isAddress(offCurveAddress));
+
+// // Not a valid public key
+const errorPubkey = "testPubkey";
+console.log("Invalid Address: ", isAddress(errorPubkey));
+```
+
+</Tab>
+<Tab value="web3.js v1">
+
+```typescript
 import { PublicKey } from "@solana/web3.js";
 
 // Note that Keypair.generate() will always give a public key that is valid for users
@@ -31,4 +60,9 @@ console.log(PublicKey.isOnCurve(offCurveAddress.toBytes()));
 
 // Not a valid public key
 const errorPubkey = new PublicKey("testPubkey");
+console.log(PublicKey.isOnCurve(errorPubkey.toBytes()));
+```
+
+</Tab>
+</Tabs>
 ```