From b505bebdac99a4f007c200441170fdb7b362e44a Mon Sep 17 00:00:00 2001
From: 0xfnzero <0xfnzero@users.noreply.github.com>
Date: Sat, 9 May 2026 08:18:58 +0800
Subject: [PATCH] fix(pumpfun): use is_cashback_coin instead of is_mayhem_mode
 for sell user_volume_accumulator

The Pump.fun IDL explicitly states that user_volume_accumulator is
passed as remaining_accounts[0] for cashback coins during sell.
Using is_mayhem_mode incorrectly omitted the account for cashback
tokens, causing the program to misread bonding_curve_v2 as
user_volume_accumulator and resulting in Custom(6024) Overflow.
---
 src/instruction/pumpfun.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/instruction/pumpfun.rs b/src/instruction/pumpfun.rs
index 09dfebd..d15552d 100644
--- a/src/instruction/pumpfun.rs
+++ b/src/instruction/pumpfun.rs
@@ -328,7 +328,7 @@ fn build_sell_v1(params: &SwapParams) -> Result<Vec<Instruction>> {
         accounts::FEE_PROGRAM_META,
     ];
 
-    if bonding_curve.is_mayhem_mode {
+    if bonding_curve.is_cashback_coin {
         metas.push(AccountMeta::new(user_volume_accumulator, false));
     }