From c423156a680809f63b28063e3cd1ae22ff9cc42e Mon Sep 17 00:00:00 2001
From: Kubudak90 <kubudak@outlook.com>
Date: Tue, 7 Apr 2026 14:39:19 +0300
Subject: [PATCH] fix: enable proper batching in mass-payout.js example

The original code waited for each transfer to complete inside the loop,
which defeated the purpose of batching. This fix:

1. Collects all transfers first without waiting for confirmation
2. Waits for all transfers to complete in a separate loop
3. Improves performance by allowing parallel processing
4. Adds better error handling for each phase

Fixes #416
---
 quickstart-template/mass-payout.js | 22 +++++++++++++++++-----
 1 file changed, 17 insertions(+), 5 deletions(-)

diff --git a/quickstart-template/mass-payout.js b/quickstart-template/mass-payout.js
index 7131b0ab..0cef1c7c 100644
--- a/quickstart-template/mass-payout.js
+++ b/quickstart-template/mass-payout.js
@@ -56,15 +56,17 @@ async function createAndFundSendingWallet() {
 
 // Read from CSV file and send mass payout.
 async function sendMassPayout(sendingWallet) {
-  // Define amount to send.
+  // Define amount and assetId for transfer.
   const transferAmount = 0.000002;
   const assetId = Coinbase.assets.Eth;
+  const transfers = [];
 
   try {
     const parser = fs
       .createReadStream("./wallet-array.csv")
       .pipe(parse({ delimiter: ",", from_line: 1 }));
 
+    // STEP 1: Queue all transfers without waiting for confirmation (enables batching)
     for await (const row of parser) {
       const address = row[0];
       if (address) {
@@ -76,14 +78,24 @@ async function sendMassPayout(sendingWallet) {
             destination: address,
           });
 
-          await transfer.wait();
-
-          console.log(`Transfer to ${address} successful`);
+          transfers.push({ address, transfer });
+          console.log(`Queued transfer to ${address}`);
         } catch (error) {
-          console.error(`Error transferring to ${address}: `, error);
+          console.error(`Error creating transfer to ${address}: `, error);
         }
       }
     }
+
+    // STEP 2: Wait for all transfers to complete
+    console.log(`\nWaiting for ${transfers.length} transfers to complete...`);
+    for (const { address, transfer } of transfers) {
+      try {
+        await transfer.wait();
+        console.log(`Transfer to ${address} successful`);
+      } catch (error) {
+        console.error(`Transfer to ${address} failed: `, error);
+      }
+    }
   } catch (error) {
     console.error(`Error processing CSV file: `, error);
   }