From d6104078203dad288817a55d8c9ac4c3fd6349eb Mon Sep 17 00:00:00 2001
From: Eitan Seri-Levi <eserilev@ucsc.edu>
Date: Sun, 21 Jun 2026 18:05:29 +0300
Subject: [PATCH] builder payments w/ slashed validators fix

---
 consensus/state_processing/src/per_block_processing.rs     | 1 +
 .../src/per_block_processing/process_operations.rs         | 7 ++++++-
 consensus/types/src/builder/builder_pending_payment.rs     | 2 ++
 3 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/consensus/state_processing/src/per_block_processing.rs b/consensus/state_processing/src/per_block_processing.rs
index 61748cdc02..7a40ff28af 100644
--- a/consensus/state_processing/src/per_block_processing.rs
+++ b/consensus/state_processing/src/per_block_processing.rs
@@ -799,6 +799,7 @@ pub fn process_execution_payload_bid<E: EthSpec, Payload: AbstractExecPayload<E>
                 amount,
                 builder_index,
             },
+            proposer_index: block.proposer_index(),
         };
 
         let payment_index = E::SlotsPerEpoch::to_usize()
diff --git a/consensus/state_processing/src/per_block_processing/process_operations.rs b/consensus/state_processing/src/per_block_processing/process_operations.rs
index 86ad13079c..d081a27df3 100644
--- a/consensus/state_processing/src/per_block_processing/process_operations.rs
+++ b/consensus/state_processing/src/per_block_processing/process_operations.rs
@@ -418,7 +418,12 @@ pub fn process_proposer_slashings<E: EthSpec>(
                         .builder_pending_payments_mut()?
                         .get_mut(index)
                         .ok_or(BlockProcessingError::BuilderPaymentIndexOutOfBounds(index))?;
-                    *payment = BuilderPendingPayment::default();
+
+                    if payment.proposer_index
+                        == proposer_slashing.signed_header_1.message.proposer_index
+                    {
+                        *payment = BuilderPendingPayment::default();
+                    }
                 }
             }
 
diff --git a/consensus/types/src/builder/builder_pending_payment.rs b/consensus/types/src/builder/builder_pending_payment.rs
index 61c76dfc15..bc2cabc6bc 100644
--- a/consensus/types/src/builder/builder_pending_payment.rs
+++ b/consensus/types/src/builder/builder_pending_payment.rs
@@ -13,6 +13,8 @@ pub struct BuilderPendingPayment {
     #[serde(with = "serde_utils::quoted_u64")]
     pub weight: u64,
     pub withdrawal: BuilderPendingWithdrawal,
+    #[serde(with = "serde_utils::quoted_u64")]
+    pub proposer_index: u64,
 }
 
 #[cfg(test)]