From f9ab429a5873bc5e06bfa37536d26562d60a5028 Mon Sep 17 00:00:00 2001
From: Kubudak90 <kubudak@outlook.com>
Date: Tue, 7 Apr 2026 07:23:40 +0300
Subject: [PATCH] fix(quickstart): enable batching in mass-payout.js

The sendMassPayout function was awaiting each transfer inside the
for-await loop, which prevented the SDK from batching transfers
efficiently. This caused sequential processing instead of parallel.

Changes:
- Collect all transfers in an array first
- Wait for all transfers to complete after queuing
- Improves performance when processing multiple payouts

Fixes #416
---
 quickstart-template/mass-payout.js | 25 ++++++++++++++++++++-----
 1 file changed, 20 insertions(+), 5 deletions(-)

diff --git a/quickstart-template/mass-payout.js b/quickstart-template/mass-payout.js
index 7131b0ab..7c661484 100644
--- a/quickstart-template/mass-payout.js
+++ b/quickstart-template/mass-payout.js
@@ -56,10 +56,13 @@ async function createAndFundSendingWallet() {
 
 // Read from CSV file and send mass payout.
 async function sendMassPayout(sendingWallet) {
-  // Define amount to send.
+  // Define a variable for the amount and assetId to transfer.
   const transferAmount = 0.000002;
   const assetId = Coinbase.assets.Eth;
 
+  // Array to store pending transfers for batch processing
+  const pendingTransfers = [];
+
   try {
     const parser = fs
       .createReadStream("./wallet-array.csv")
@@ -76,14 +79,26 @@ async function sendMassPayout(sendingWallet) {
             destination: address,
           });
 
-          await transfer.wait();
-
-          console.log(`Transfer to ${address} successful`);
+          // Store transfer for later batch processing instead of waiting immediately
+          pendingTransfers.push({ address, transfer });
+          console.log(`Transfer to ${address} queued`);
         } catch (error) {
-          console.error(`Error transferring to ${address}: `, error);
+          console.error(`Error creating transfer to ${address}: `, error);
         }
       }
     }
+
+    // Wait for all transfers to complete in parallel for better performance
+    console.log(`\nWaiting for ${pendingTransfers.length} transfers to complete...`);
+    
+    for (const { address, transfer } of pendingTransfers) {
+      try {
+        await transfer.wait();
+        console.log(`Transfer to ${address} completed successfully`);
+      } catch (error) {
+        console.error(`Transfer to ${address} failed: `, error);
+      }
+    }
   } catch (error) {
     console.error(`Error processing CSV file: `, error);
   }