ethereum · hwwhww · Nov 26, 2024 · Nov 26, 2024 · Nov 28, 2024 · parithosh
diff --git a/configs/mainnet.yaml b/configs/mainnet.yaml
@@ -144,14 +144,26 @@ ATTESTATION_SUBNET_PREFIX_BITS: 6
 # Deneb
 # `2**7` (=128)
 MAX_REQUEST_BLOCKS_DENEB: 128
-# MAX_REQUEST_BLOCKS_DENEB * MAX_BLOBS_PER_BLOCK
-MAX_REQUEST_BLOB_SIDECARS: 768
 # `2**12` (= 4096 epochs, ~18 days)
 MIN_EPOCHS_FOR_BLOB_SIDECARS_REQUESTS: 4096
 # `6`
 BLOB_SIDECAR_SUBNET_COUNT: 6
-## `uint64(6)`
+# `uint64(6)`
 MAX_BLOBS_PER_BLOCK: 6
+# MAX_REQUEST_BLOCKS_DENEB * MAX_BLOBS_PER_BLOCK
+MAX_REQUEST_BLOB_SIDECARS: 768
+
+# Electra
+# 2**7 * 10**9 (= 128,000,000,000)
+MIN_PER_EPOCH_CHURN_LIMIT_ELECTRA: 128000000000
+# 2**8 * 10**9 (= 256,000,000,000)
+MAX_PER_EPOCH_ACTIVATION_EXIT_CHURN_LIMIT: 256000000000
+# `9`
+BLOB_SIDECAR_SUBNET_COUNT_ELECTRA: 9
+# `uint64(9)`
+MAX_BLOBS_PER_BLOCK_ELECTRA: 9
+# MAX_REQUEST_BLOCKS_DENEB * MAX_BLOBS_PER_BLOCK_ELECTRA
+MAX_REQUEST_BLOB_SIDECARS_ELECTRA: 1152
 
 # Whisk
 # `Epoch(2**8)`
@@ -170,9 +182,5 @@ MAX_BLOBS_PER_BLOCK_EIP7594: 8
 # `MAX_REQUEST_BLOCKS_DENEB * MAX_BLOBS_PER_BLOCK_EIP7594`
 MAX_REQUEST_BLOB_SIDECARS_EIP7594: 1024
 
-# [New in Electra:EIP7251]
-MIN_PER_EPOCH_CHURN_LIMIT_ELECTRA: 128000000000 # 2**7 * 10**9 (= 128,000,000,000)
-MAX_PER_EPOCH_ACTIVATION_EXIT_CHURN_LIMIT: 256000000000 # 2**8 * 10**9 (= 256,000,000,000)
-
 # EIP7732
 MAX_REQUEST_PAYLOADS: 128
diff --git a/configs/minimal.yaml b/configs/minimal.yaml
@@ -145,14 +145,26 @@ ATTESTATION_SUBNET_PREFIX_BITS: 6
 # Deneb
 # `2**7` (=128)
 MAX_REQUEST_BLOCKS_DENEB: 128
-# MAX_REQUEST_BLOCKS_DENEB * MAX_BLOBS_PER_BLOCK
-MAX_REQUEST_BLOB_SIDECARS: 768
 # `2**12` (= 4096 epochs, ~18 days)
 MIN_EPOCHS_FOR_BLOB_SIDECARS_REQUESTS: 4096
 # `6`
 BLOB_SIDECAR_SUBNET_COUNT: 6
 ## `uint64(6)`
 MAX_BLOBS_PER_BLOCK: 6
+# MAX_REQUEST_BLOCKS_DENEB * MAX_BLOBS_PER_BLOCK
+MAX_REQUEST_BLOB_SIDECARS: 768
+
+# Electra
+# [customized] 2**6 * 10**9 (= 64,000,000,000)
+MIN_PER_EPOCH_CHURN_LIMIT_ELECTRA: 64000000000 
+# [customized] 2**7 * 10**9 (= 128,000,000,000)
+MAX_PER_EPOCH_ACTIVATION_EXIT_CHURN_LIMIT: 128000000000
+# `9`
+BLOB_SIDECAR_SUBNET_COUNT_ELECTRA: 9
+# `uint64(9)`
+MAX_BLOBS_PER_BLOCK_ELECTRA: 9
+# MAX_REQUEST_BLOCKS_DENEB * MAX_BLOBS_PER_BLOCK_ELECTRA
+MAX_REQUEST_BLOB_SIDECARS_ELECTRA: 1152
 
 # Whisk
 WHISK_EPOCHS_PER_SHUFFLING_PHASE: 4
@@ -169,9 +181,5 @@ MAX_BLOBS_PER_BLOCK_EIP7594: 8
 # `MAX_REQUEST_BLOCKS_DENEB * MAX_BLOBS_PER_BLOCK_EIP7594`
 MAX_REQUEST_BLOB_SIDECARS_EIP7594: 1024
 
-# [New in Electra:EIP7251]
-MIN_PER_EPOCH_CHURN_LIMIT_ELECTRA: 64000000000 # 2**6 * 10**9 (= 64,000,000,000)
-MAX_PER_EPOCH_ACTIVATION_EXIT_CHURN_LIMIT: 128000000000 # 2**7 * 10**9 (= 128,000,000,000)
-
 # EIP7732
 MAX_REQUEST_PAYLOADS: 128
diff --git a/presets/minimal/deneb.yaml b/presets/minimal/deneb.yaml
@@ -5,6 +5,6 @@
 # `uint64(4096)`
 FIELD_ELEMENTS_PER_BLOB: 4096
 # [customized]
-MAX_BLOB_COMMITMENTS_PER_BLOCK: 16
-# [customized] `floorlog2(get_generalized_index(BeaconBlockBody, 'blob_kzg_commitments')) + 1 + ceillog2(MAX_BLOB_COMMITMENTS_PER_BLOCK)` = 4 + 1 + 4 = 9
-KZG_COMMITMENT_INCLUSION_PROOF_DEPTH: 9
+MAX_BLOB_COMMITMENTS_PER_BLOCK: 32
+# [customized] `floorlog2(get_generalized_index(BeaconBlockBody, 'blob_kzg_commitments')) + 1 + ceillog2(MAX_BLOB_COMMITMENTS_PER_BLOCK)` = 4 + 1 + 5 = 10
+KZG_COMMITMENT_INCLUSION_PROOF_DEPTH: 10
diff --git a/specs/_features/eip7594/p2p-interface.md b/specs/_features/eip7594/p2p-interface.md
@@ -28,8 +28,8 @@
         - [`data_column_sidecar_{subnet_id}`](#data_column_sidecar_subnet_id)
   - [The Req/Resp domain](#the-reqresp-domain)
     - [Messages](#messages)
-      - [BlobSidecarsByRoot v2](#blobsidecarsbyroot-v2)
-      - [BlobSidecarsByRange v2](#blobsidecarsbyrange-v2)
+      - [BlobSidecarsByRoot v3](#blobsidecarsbyroot-v3)
+      - [BlobSidecarsByRange v3](#blobsidecarsbyrange-v3)
       - [DataColumnSidecarsByRoot v1](#datacolumnsidecarsbyroot-v1)
       - [DataColumnSidecarsByRange v1](#datacolumnsidecarsbyrange-v1)
       - [GetMetaData v3](#getmetadata-v3)
@@ -204,9 +204,9 @@ The following validations MUST pass before forwarding the `sidecar: DataColumnSi
 
 #### Messages
 
-##### BlobSidecarsByRoot v2
+##### BlobSidecarsByRoot v3
 
-**Protocol ID:** `/eth2/beacon_chain/req/blob_sidecars_by_root/2/`
+**Protocol ID:** `/eth2/beacon_chain/req/blob_sidecars_by_root/3/`
 
 *[Updated in EIP7594]*
 
@@ -238,9 +238,9 @@ Response Content:
 
 No more than `MAX_REQUEST_BLOB_SIDECARS_EIP7594` may be requested at a time.
 
-##### BlobSidecarsByRange v2
+##### BlobSidecarsByRange v3
 
-**Protocol ID:** `/eth2/beacon_chain/req/blob_sidecars_by_range/2/`
+**Protocol ID:** `/eth2/beacon_chain/req/blob_sidecars_by_range/3/`
 
 *[Updated in EIP7594]*
 

diff --git a/specs/electra/beacon-chain.md b/specs/electra/beacon-chain.md
@@ -22,6 +22,7 @@
   - [Withdrawals processing](#withdrawals-processing)
   - [Pending deposits processing](#pending-deposits-processing)
 - [Configuration](#configuration)
+  - [Execution](#execution-1)
   - [Validator cycle](#validator-cycle)
 - [Containers](#containers)
   - [New containers](#new-containers)
@@ -119,6 +120,7 @@ Electra is a consensus-layer upgrade containing a number of features. Including:
 * [EIP-7002](https://eips.ethereum.org/EIPS/eip-7002): Execution layer triggerable exits
 * [EIP-7251](https://eips.ethereum.org/EIPS/eip-7251): Increase the MAX_EFFECTIVE_BALANCE
 * [EIP-7549](https://eips.ethereum.org/EIPS/eip-7549): Move committee index outside Attestation
+* [EIP-7691](https://eips.ethereum.org/EIPS/eip-7691): Blob throughput increase
 
 *Note:* This specification is built upon [Deneb](../deneb/beacon-chain.md) and is under active development.
 
@@ -200,6 +202,12 @@ The following values are (non-configurable) constants used throughout the specif
 
 ## Configuration
 
+### Execution
+
+| Name | Value | Description |
+| - | - | - |
+| `MAX_BLOBS_PER_BLOCK_ELECTRA` | `uint64(9)` | *[New in Electra:EIP-7691]* Maximum number of blobs in a single block limited by `MAX_BLOB_COMMITMENTS_PER_BLOCK` |
+
 ### Validator cycle
 
 | Name | Value |
@@ -1205,7 +1213,7 @@ def process_execution_payload(state: BeaconState, body: BeaconBlockBody, executi
     # Verify timestamp
     assert payload.timestamp == compute_timestamp_at_slot(state, state.slot)
     # Verify commitments are under limit
-    assert len(body.blob_kzg_commitments) <= MAX_BLOBS_PER_BLOCK
+    assert len(body.blob_kzg_commitments) <= MAX_BLOBS_PER_BLOCK_ELECTRA  # [Modified in Electra:EIP7691]
     # Verify the execution payload is valid
     versioned_hashes = [kzg_commitment_to_versioned_hash(commitment) for commitment in body.blob_kzg_commitments]
     assert execution_engine.verify_and_notify_new_payload(

diff --git a/specs/electra/p2p-interface.md b/specs/electra/p2p-interface.md
@@ -11,18 +11,33 @@ The specification of these changes continues in the same format as the network s
 <!-- DON'T EDIT THIS SECTION, INSTEAD RE-RUN doctoc TO UPDATE -->
 
 - [Modifications in Electra](#modifications-in-electra)
+  - [Configuration](#configuration)
   - [The gossip domain: gossipsub](#the-gossip-domain-gossipsub)
     - [Topics and messages](#topics-and-messages)
-    - [Global topics](#global-topics)
-      - [`beacon_aggregate_and_proof`](#beacon_aggregate_and_proof)
-    - [Attestation subnets](#attestation-subnets)
-      - [`beacon_attestation_{subnet_id}`](#beacon_attestation_subnet_id)
+      - [Global topics](#global-topics)
+        - [`beacon_block`](#beacon_block)
+        - [`beacon_aggregate_and_proof`](#beacon_aggregate_and_proof)
+      - [Attestation subnets](#attestation-subnets)
+        - [`beacon_attestation_{subnet_id}`](#beacon_attestation_subnet_id)
+  - [The Req/Resp domain](#the-reqresp-domain)
+    - [Messages](#messages)
+      - [BlobSidecarsByRoot v2](#blobsidecarsbyroot-v2)
+      - [BlobSidecarsByRange v2](#blobsidecarsbyrange-v2)
 
 <!-- END doctoc generated TOC please keep comment here to allow auto update -->
 <!-- /TOC -->
 
 ## Modifications in Electra
 
+### Configuration
+
+*[New in Electra:EIP7691]*
+
+| Name                                           | Value                                                    | Description                                                               |
+|------------------------------------------------|----------------------------------------------------------|---------------------------------------------------------------------------|
+| `MAX_REQUEST_BLOB_SIDECARS_ELECTRA`            | `MAX_REQUEST_BLOCKS_DENEB * MAX_BLOBS_PER_BLOCK_ELECTRA` | Maximum number of blob sidecars in a single request                       |
+| `BLOB_SIDECAR_SUBNET_COUNT_ELECTRA`            | `9`                                                      | The number of blob sidecar subnets used in the gossipsub protocol         |
+
 ### The gossip domain: gossipsub
 
 Some gossip meshes are upgraded in the fork of Electra to support upgraded types.
@@ -41,9 +56,16 @@ The specification around the creation, validation, and dissemination of messages
 
 The derivation of the `message-id` remains stable.
 
-#### Global topics
+##### Global topics
+
+###### `beacon_block`
 
-##### `beacon_aggregate_and_proof`
+*Updated validation*
+
+- _[REJECT]_ The length of KZG commitments is less than or equal to the limitation defined in Consensus Layer --
+  i.e. validate that `len(body.signed_beacon_block.message.blob_kzg_commitments) <= MAX_BLOBS_PER_BLOCK_ELECTRA`
+
+###### `beacon_aggregate_and_proof`
 
 The following convenience variables are re-defined
 - `index = get_committee_indices(aggregate.committee_bits)[0]`
@@ -52,9 +74,9 @@ The following validations are added:
 * [REJECT] `len(committee_indices) == 1`, where `committee_indices = get_committee_indices(aggregate)`.
 * [REJECT] `aggregate.data.index == 0`
 
-#### Attestation subnets
+##### Attestation subnets
 
-##### `beacon_attestation_{subnet_id}`
+###### `beacon_attestation_{subnet_id}`
 
 The topic is updated to propagate `SingleAttestation` objects.
 
@@ -71,3 +93,78 @@ The following validations are removed:
   that is, it has exactly one participating validator (`len([bit for bit in aggregation_bits if bit]) == 1`, i.e. exactly 1 bit is set).
 - _[REJECT]_ The number of aggregation bits matches the committee size -- i.e.
   `len(aggregation_bits) == len(get_beacon_committee(state, attestation.data.slot, index))`.
+
+### The Req/Resp domain
+
+#### Messages
+
+##### BlobSidecarsByRoot v2
+
+**Protocol ID:** `/eth2/beacon_chain/req/blob_sidecars_by_root/2/`
+
+*[Updated in ]*
+
+The `<context-bytes>` field is calculated as `context = compute_fork_digest(fork_version, genesis_validators_root)`:
+
+[1]: # (eth2spec: skip)
+
+| `fork_version`         | Chunk SSZ type        |
+|------------------------|-----------------------|
+| `DENEB_FORK_VERSION`   | `deneb.BlobSidecar`   |
+| `ELECTRA_FORK_VERSION` | `electra.BlobSidecar` |
+
+Request Content:
+
+```
+(
+  List[BlobIdentifier, MAX_REQUEST_BLOB_SIDECARS_ELECTRA]
+)
+```
+
+Response Content:
+
+```
+(
+  List[BlobSidecar, MAX_REQUEST_BLOB_SIDECARS_ELECTRA]
+)
+```
+
+*Updated validation*
+
+No more than `MAX_REQUEST_BLOB_SIDECARS_ELECTRA` may be requested at a time.
+
+##### BlobSidecarsByRange v2
+
+**Protocol ID:** `/eth2/beacon_chain/req/blob_sidecars_by_range/2/`
+
+*[Updated in ]*
+
+The `<context-bytes>` field is calculated as `context = compute_fork_digest(fork_version, genesis_validators_root)`:
+
+[1]: # (eth2spec: skip)
+
+| `fork_version`         | Chunk SSZ type        |
+|------------------------|-----------------------|
+| `DENEB_FORK_VERSION`   | `deneb.BlobSidecar`   |
+| `ELECTRA_FORK_VERSION` | `electra.BlobSidecar` |
+
+Request Content:
+
+```
+(
+  start_slot: Slot
+  count: uint64
+)
+```
+
+Response Content:
+
+```
+(
+  List[BlobSidecar, MAX_REQUEST_BLOB_SIDECARS_ELECTRA]
+)
+```
+
+*Updated validation*
+
+Clients MUST respond with at least the blob sidecars of the first blob-carrying block that exists in the range, if they have it, and no more than `MAX_REQUEST_BLOB_SIDECARS_ELECTRA` sidecars.
diff --git a/tests/core/pyspec/eth2spec/test/electra/unittests/test_config_invariants.py b/tests/core/pyspec/eth2spec/test/electra/unittests/test_config_invariants.py
@@ -13,3 +13,16 @@ def test_processing_pending_partial_withdrawals(spec):
         spec.MAX_PENDING_PARTIALS_PER_WITHDRAWALS_SWEEP
         < spec.MAX_WITHDRAWALS_PER_PAYLOAD
     )
+
+
+@with_electra_and_later
+@spec_test
+@single_phase
+def test_networking(spec):
+    assert spec.config.MAX_BLOBS_PER_BLOCK_ELECTRA <= spec.MAX_BLOB_COMMITMENTS_PER_BLOCK
+    assert (
+        spec.config.MAX_REQUEST_BLOB_SIDECARS_ELECTRA ==
+        spec.config.MAX_REQUEST_BLOCKS_DENEB * spec.config.MAX_BLOBS_PER_BLOCK_ELECTRA
+    )
+    # Start with the same size, but `BLOB_SIDECAR_SUBNET_COUNT` could potentially increase later.
+    assert spec.config.BLOB_SIDECAR_SUBNET_COUNT_ELECTRA == spec.config.MAX_BLOBS_PER_BLOCK_ELECTRA
diff --git a/tests/core/pyspec/eth2spec/test/helpers/blob.py b/tests/core/pyspec/eth2spec/test/helpers/blob.py
@@ -3,6 +3,7 @@
 from rlp.sedes import Binary, CountableList, List as RLPList, big_endian_int, binary
 
 from eth2spec.test.helpers.forks import (
+    is_post_electra,
     is_post_eip7594,
 )
 
@@ -108,5 +109,7 @@ def get_sample_blob_tx(spec, blob_count=1, rng=random.Random(5566), is_valid_blo
 def get_max_blob_count(spec):
     if is_post_eip7594(spec):
         return spec.config.MAX_BLOBS_PER_BLOCK_EIP7594
+    elif is_post_electra(spec):
+        return spec.config.MAX_BLOBS_PER_BLOCK_ELECTRA
     else:
         return spec.config.MAX_BLOBS_PER_BLOCK