From 5ac70527d67bec1014ad3a5e6bc4059f210f67be Mon Sep 17 00:00:00 2001
From: dapplion <35266934+dapplion@users.noreply.github.com>
Date: Mon, 15 Jul 2024 17:36:50 +0200
Subject: [PATCH] Add BeaconBlocksByRange v3

---
 specs/electra/p2p-interface.md | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/specs/electra/p2p-interface.md b/specs/electra/p2p-interface.md
index ebdcaaa831..ba0b280a60 100644
--- a/specs/electra/p2p-interface.md
+++ b/specs/electra/p2p-interface.md
@@ -57,3 +57,33 @@ The following convenience variables are re-defined
 The following validations are added:
 * [REJECT] `len(committee_indices) == 1`, where `committee_indices = get_committee_indices(attestation)`.
 * [REJECT] `attestation.data.index == 0`
+
+## The Req/Resp domain
+
+### Messages
+
+#### BeaconBlocksByRange v3
+
+**Protocol ID:** `/eth2/beacon_chain/req/beacon_blocks_by_range/3/`
+
+Request Content:
+```
+(
+  block_root: Root
+  start_slot: Slot
+  count: uint64
+)
+```
+
+Response Content:
+```
+(
+  List[SignedBeaconBlock, MAX_REQUEST_BLOCKS]
+)
+```
+
+Extends behaviour of BeaconBlocksByRange v2 as defined in [the altair p2p spec](../altair/p2p-interface.md).
+
+Requests beacon blocks in the slot range `[start_slot, start_slot + count)`, leading up to `block_root`. If the block with `block_root` is unknown the responder MUST respond with `3: ResourceUnavailable`. If the slot of the block with `block_root` is less than `start_slot` the responder MUST respond with `1: InvalidRequest`.
+
+