Add Permission Delegation sample code

_code-samples/delegate-permissions/js/delegate-permissions.js

@@ -0,0 +1,48 @@
+const xrpl = require('xrpl')
+
+async function main() {
+    const client = new xrpl.Client("wss://s.devnet.rippletest.net:51233")
+    await client.connect()
+
+    console.log("Funding new wallet from faucet...")
+    const { wallet } = await client.fundWallet()
+
+    // Define the transaction
+    const delegate_address = "r9GAKojMTyexqvy8DXFWYq63Mod5k5wnkT"
+    const delegateset = {
+        "TransactionType": "DelegateSet",
+        "Account": wallet.address,
+        "Authorize": delegate_address,
+        "Permissions": [
+            {
+                "Permission": {
+                    "PermissionValue": "AccountDomainSet"
+                }
+            }
+        ]
+    }
+
+    // Prepare, sign, and submit the transaction
+    const prepared = await client.autofill(delegateset)
+    const signed = wallet.sign(prepared)
+    const result = await client.submitAndWait(signed.tx_blob)
+
+    // Check transaction results
+    console.log(result)
+    if (result.result.meta.TransactionResult === "tesSUCCESS") {
+        console.log("Delegate successfully set.")
+    }
+
+    // Confirm presence of Delegate ledger entry using account_objects
+    response = await client.request({
+        "command": "account_objects",
+        "account": wallet.address,
+        "type": "delegate",
+        "ledger_index": "validated"
+    })
+    console.log(JSON.stringify(response, null, 2))
+
+    client.disconnect()
+}
+
+main()