example(oft-solana): validate updates before rent transfer

Co-authored-by: nazreen.mohamad <nazreen.mohamad@layerzerolabs.org>

Author: cursoragent

examples/oft-solana/tasks/solana/updateMetadata.ts

@@ -235,6 +235,11 @@ async function updateTokenExtensionsMetadata({
         throw new Error(`Mint account not found: ${mintStr}`)
     }
 
+    const hasFieldUpdates = Boolean(name || symbol || uri)
+    if (!hasFieldUpdates) {
+        throw new Error('At least one of --name, --symbol, or --uri must be provided')
+    }
+
     // Build instructions for each field that needs updating
     const instructions = []
 
@@ -309,10 +314,6 @@ async function updateTokenExtensionsMetadata({
         )
     }
 
-    if (instructions.length === 0) {
-        throw new Error('At least one of --name, --symbol, or --uri must be provided')
-    }
-
     const { blockhash } = await connection.getLatestBlockhash()
 
     const message = new TransactionMessage({