From 0ed74fb53affcb0705bb2dc583d706620131dc45 Mon Sep 17 00:00:00 2001
From: Alex Stokes <r.alex.stokes@gmail.com>
Date: Wed, 12 Jun 2024 09:56:08 -0600
Subject: [PATCH] specify the max blobs per block with each payload

---
 specs/electra/fork-choice.md | 37 ++++++++++++++++++++++++++++++++++++
 specs/electra/validator.md   |  1 +
 2 files changed, 38 insertions(+)
 create mode 100644 specs/electra/fork-choice.md

diff --git a/specs/electra/fork-choice.md b/specs/electra/fork-choice.md
new file mode 100644
index 0000000000..a143d43b80
--- /dev/null
+++ b/specs/electra/fork-choice.md
@@ -0,0 +1,37 @@
+# Electra -- Fork Choice
+
+## Table of contents
+<!-- TOC -->
+<!-- START doctoc generated TOC please keep comment here to allow auto update -->
+<!-- DON'T EDIT THIS SECTION, INSTEAD RE-RUN doctoc TO UPDATE -->
+
+- [Introduction](#introduction)
+- [Containers](#containers)
+- [Helpers](#helpers)
+  - [Extended `PayloadAttributes`](#extended-payloadattributes)
+
+<!-- END doctoc generated TOC please keep comment here to allow auto update -->
+<!-- /TOC -->
+
+## Introduction
+
+This is the modification of the fork choice accompanying the Electra upgrade.
+
+## Containers
+
+## Helpers
+
+### Extended `PayloadAttributes`
+
+`PayloadAttributes` is extended with the maximum number of blobs per block.
+
+```python
+@dataclass
+class PayloadAttributes(object):
+    timestamp: uint64
+    prev_randao: Bytes32
+    suggested_fee_recipient: ExecutionAddress
+    withdrawals: Sequence[Withdrawal]
+    parent_beacon_block_root: Root
+    max_blobs_per_block: uint64  # [New in Electra]
+```
diff --git a/specs/electra/validator.md b/specs/electra/validator.md
index f589e963c5..3bae8250ea 100644
--- a/specs/electra/validator.md
+++ b/specs/electra/validator.md
@@ -139,6 +139,7 @@ def prepare_execution_payload(state: BeaconState,
         suggested_fee_recipient=suggested_fee_recipient,
         withdrawals=withdrawals,
         parent_beacon_block_root=hash_tree_root(state.latest_block_header),
+        max_blobs_per_block=MAX_BLOBS_PER_BLOCK,  # [New in Electra]
     )
     return execution_engine.notify_forkchoice_updated(
         head_block_hash=parent_hash,