refactor: add gas limit information and ensure callback logic adheres to it

Author: Le-Caignec

src/guides/build-iapp/advanced/result-callback.md

@@ -89,6 +89,13 @@ contract IExecCallbackReceiver {
 }
 ```
 
+::: tip Important
+
+The callback transaction is subject to a gas limit of {{ gasLimit }}.  
+Ensure your callback logic fits within this limit to avoid out-of-gas errors.
+
+:::
+
 ### Step 3: Run the iApp with a Callback
 
 When creating the request order, set the `callback` field to your callback
@@ -154,3 +161,22 @@ const taskId = await iexec.order.matchOrders({
 | Automation           | Workflow step completion signal          |
 | Dynamic parameters   | Adjust rates / thresholds / quorums      |
 | Logical bridge       | Sync external (IoT / legacy) state       |
+
+<script setup>
+import { computed } from 'vue';
+import useUserStore from '@/stores/useUser.store';
+import { getChainById } from '@/utils/chain.utils';
+
+// Get current chain info
+const userStore = useUserStore();
+const selectedChain = computed(() => userStore.getCurrentChainId());
+const chainData = computed(() => getChainById(selectedChain.value));
+const chainName = computed(() => chainData.value.chainName);
+
+const gasLimit = computed(() => {
+  const chainId = selectedChain.value;
+  if (chainId === 42161) return '100,000'; // Arbitrum One
+  if (chainId === 134) return '200,000'; // Bellecour
+  return '100,000'; // default
+});
+</script>