Add BLOB_SIDECAR_SUBNET_COUNT_EIP7594, MAX_BLOBS_PER_BLOCK_EIP7594, and MAX_REQUEST_BLOB_SIDECARS_EIP7594

configs/mainnet.yaml

@@ -165,6 +165,10 @@ DATA_COLUMN_SIDECAR_SUBNET_COUNT: 128
 MAX_REQUEST_DATA_COLUMN_SIDECARS: 16384
 SAMPLES_PER_SLOT: 8
 CUSTODY_REQUIREMENT: 4
+BLOB_SIDECAR_SUBNET_COUNT_EIP7594: 8
+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)

configs/minimal.yaml

@@ -164,6 +164,10 @@ DATA_COLUMN_SIDECAR_SUBNET_COUNT: 128
 MAX_REQUEST_DATA_COLUMN_SIDECARS: 16384
 SAMPLES_PER_SLOT: 8
 CUSTODY_REQUIREMENT: 4
+BLOB_SIDECAR_SUBNET_COUNT_EIP7594: 8
+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)

specs/_features/eip7594/beacon-chain.md

@@ -0,0 +1,141 @@
+# EIP7594 -- The Beacon Chain
+
+**Notice**: This document is a work-in-progress for researchers and implementers.
+
+## 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)
+- [Configuration](#configuration)
+  - [Execution](#execution)
+    - [Execution payload](#execution-payload)
+      - [Modified `process_execution_payload`](#modified-process_execution_payload)
+- [Testing](#testing)
+
+<!-- END doctoc generated TOC please keep comment here to allow auto update -->
+<!-- /TOC -->
+
+## Introduction
+
+*Note:* This specification is built upon [Electra](../electra/beacon-chain.md) and is under active development.
+
+## Configuration
+
+### Execution
+
+| Name | Value | Description |
+| - | - | - |
+| `MAX_BLOBS_PER_BLOCK_EIP7594` | `uint64(8)` | *[New in EIP7494]* maximum number of blobs in a single block limited by `MAX_BLOB_COMMITMENTS_PER_BLOCK` |
+
+
+#### Execution payload
+
+##### Modified `process_execution_payload`
+
+```python
+def process_execution_payload(state: BeaconState, body: BeaconBlockBody, execution_engine: ExecutionEngine) -> None:
+    payload = body.execution_payload
+
+    # Verify consistency of the parent hash with respect to the previous execution payload header
+    assert payload.parent_hash == state.latest_execution_payload_header.block_hash
+    # Verify prev_randao
+    assert payload.prev_randao == get_randao_mix(state, get_current_epoch(state))
+    # 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_EIP7594  # [Modified in EIP7594]
+    # 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(
+        NewPayloadRequest(
+            execution_payload=payload,
+            versioned_hashes=versioned_hashes,
+            parent_beacon_block_root=state.latest_block_header.parent_root,
+            execution_requests=body.execution_requests,
+        )
+    )
+    # Cache execution payload header
+    state.latest_execution_payload_header = ExecutionPayloadHeader(
+        parent_hash=payload.parent_hash,
+        fee_recipient=payload.fee_recipient,
+        state_root=payload.state_root,
+        receipts_root=payload.receipts_root,
+        logs_bloom=payload.logs_bloom,
+        prev_randao=payload.prev_randao,
+        block_number=payload.block_number,
+        gas_limit=payload.gas_limit,
+        gas_used=payload.gas_used,
+        timestamp=payload.timestamp,
+        extra_data=payload.extra_data,
+        base_fee_per_gas=payload.base_fee_per_gas,
+        block_hash=payload.block_hash,
+        transactions_root=hash_tree_root(payload.transactions),
+        withdrawals_root=hash_tree_root(payload.withdrawals),
+        blob_gas_used=payload.blob_gas_used,
+        excess_blob_gas=payload.excess_blob_gas,
+    )
+```
+
+## Testing
+
+*Note*: The function `initialize_beacon_state_from_eth1` is modified for pure EIP7594 testing only.
+
+```python
+def initialize_beacon_state_from_eth1(eth1_block_hash: Hash32,
+                                      eth1_timestamp: uint64,
+                                      deposits: Sequence[Deposit],
+                                      execution_payload_header: ExecutionPayloadHeader=ExecutionPayloadHeader()
+                                      ) -> BeaconState:
+    fork = Fork(
+        previous_version=EIP7594_FORK_VERSION,  # [Modified in EIP7594] for testing only
+        current_version=EIP7594_FORK_VERSION,  # [Modified in EIP7594]
+        epoch=GENESIS_EPOCH,
+    )
+    state = BeaconState(
+        genesis_time=eth1_timestamp + GENESIS_DELAY,
+        fork=fork,
+        eth1_data=Eth1Data(block_hash=eth1_block_hash, deposit_count=uint64(len(deposits))),
+        latest_block_header=BeaconBlockHeader(body_root=hash_tree_root(BeaconBlockBody())),
+        randao_mixes=[eth1_block_hash] * EPOCHS_PER_HISTORICAL_VECTOR,  # Seed RANDAO with Eth1 entropy
+        deposit_requests_start_index=UNSET_DEPOSIT_REQUESTS_START_INDEX,
+    )
+
+    # Process deposits
+    leaves = list(map(lambda deposit: deposit.data, deposits))
+    for index, deposit in enumerate(deposits):
+        deposit_data_list = List[DepositData, 2**DEPOSIT_CONTRACT_TREE_DEPTH](*leaves[:index + 1])
+        state.eth1_data.deposit_root = hash_tree_root(deposit_data_list)
+        process_deposit(state, deposit)
+
+    # Process deposit balance updates
+    validator_pubkeys = [v.pubkey for v in state.validators]
+    for deposit in state.pending_deposits:
+        validator_index = ValidatorIndex(validator_pubkeys.index(deposit.pubkey))
+        increase_balance(state, validator_index, deposit.amount)
+    state.pending_deposits = []
+
+    # Process activations
+    for index, validator in enumerate(state.validators):
+        balance = state.balances[index]
+        validator.effective_balance = min(
+            balance - balance % EFFECTIVE_BALANCE_INCREMENT, get_max_effective_balance(validator))
+        if validator.effective_balance >= MIN_ACTIVATION_BALANCE:
+            validator.activation_eligibility_epoch = GENESIS_EPOCH
+            validator.activation_epoch = GENESIS_EPOCH
+
+    # Set genesis validators root for domain separation and chain versioning
+    state.genesis_validators_root = hash_tree_root(state.validators)
+
+    # Fill in sync committees
+    # Note: A duplicate committee is assigned for the current and next committee at genesis
+    state.current_sync_committee = get_next_sync_committee(state)
+    state.next_sync_committee = get_next_sync_committee(state)
+
+    # Initialize the execution payload header
+    state.latest_execution_payload_header = execution_payload_header
+
+    return state
+```

specs/_features/eip7594/p2p-interface.md

@@ -21,11 +21,15 @@
   - [MetaData](#metadata)
   - [The gossip domain: gossipsub](#the-gossip-domain-gossipsub)
     - [Topics and messages](#topics-and-messages)
+      - [Global topics](#global-topics)
+        - [`beacon_block`](#beacon_block)
       - [Blob subnets](#blob-subnets)
         - [Deprecated `blob_sidecar_{subnet_id}`](#deprecated-blob_sidecar_subnet_id)
         - [`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)
       - [DataColumnSidecarsByRoot v1](#datacolumnsidecarsbyroot-v1)
       - [DataColumnSidecarsByRange v1](#datacolumnsidecarsbyrange-v1)
       - [GetMetaData v3](#getmetadata-v3)
@@ -52,6 +56,8 @@
 |------------------------------------------------|------------------------------------------------|---------------------------------------------------------------------------|
 | `MAX_REQUEST_DATA_COLUMN_SIDECARS`             | `MAX_REQUEST_BLOCKS_DENEB * NUMBER_OF_COLUMNS` | Maximum number of data column sidecars in a single request                |
 | `MIN_EPOCHS_FOR_DATA_COLUMN_SIDECARS_REQUESTS` | `2**12` (= 4096 epochs, ~18 days)              | The minimum epoch range over which a node must serve data column sidecars |
+| `MAX_REQUEST_BLOB_SIDECARS_EIP7594`            | `MAX_REQUEST_BLOCKS_DENEB * MAX_BLOBS_PER_BLOCK_EIP7594` | Maximum number of blob sidecars in a single request  |
+| `BLOB_SIDECAR_SUBNET_COUNT_EIP7594`            | `2**3` (= 8)           | The number of blob sidecar subnets used in the gossipsub protocol. |
 
 ### Containers
 
@@ -154,6 +160,16 @@ Some gossip meshes are upgraded in the EIP-7594 fork to support upgraded types.
 
 #### Topics and messages
 
+
+##### Global topics
+
+###### `beacon_block`
+
+*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_EIP7594`
+
 ##### Blob subnets
 
 ###### Deprecated `blob_sidecar_{subnet_id}`
@@ -189,6 +205,74 @@ The following validations MUST pass before forwarding the `sidecar: DataColumnSi
 
 #### Messages
 
+##### BlobSidecarsByRoot v2
+
+**Protocol ID:** `/eth2/beacon_chain/req/blob_sidecars_by_root/2/`
+
+*[Updated in EIP7594]*
+
+The `<context-bytes>` field is calculated as `context = compute_fork_digest(fork_version, genesis_validators_root)`:
+
+[1]: # (eth2spec: skip)
+
+| `fork_version`           | Chunk SSZ type                |
+|--------------------------|-------------------------------|
+| `EIP7594_FORK_VERSION`     | `eip7594.BlobSidecar`           |
+
+Request Content:
+
+```
+(
+  List[BlobIdentifier, MAX_REQUEST_BLOB_SIDECARS_EIP7594]
+)
+```
+
+Response Content:
+
+```
+(
+  List[BlobSidecar, MAX_REQUEST_BLOB_SIDECARS_EIP7594]
+)
+```
+
+*Updated validation*
+
+No more than `MAX_REQUEST_BLOB_SIDECARS_EIP7594` may be requested at a time.
+
+
+##### BlobSidecarsByRange v2
+
+**Protocol ID:** `/eth2/beacon_chain/req/blob_sidecars_by_range/2/`
+
+*[Updated in EIP7594]*
+
+The `<context-bytes>` field is calculated as `context = compute_fork_digest(fork_version, genesis_validators_root)`:
+
+[1]: # (eth2spec: skip)
+
+| `fork_version`           | Chunk SSZ type                |
+|--------------------------|-------------------------------|
+| `EIP7594_FORK_VERSION`     | `eip7594.BlobSidecar`           |
+
+Request Content:
+```
+(
+  start_slot: Slot
+  count: uint64
+)
+```
+
+Response Content:
+```
+(
+  List[BlobSidecar, MAX_REQUEST_BLOB_SIDECARS_EIP7594]
+)
+```
+
+*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_EIP7594` sidecars.
+
 ##### DataColumnSidecarsByRoot v1
 
 **Protocol ID:** `/eth2/beacon_chain/req/data_column_sidecars_by_root/1/`

specs/deneb/beacon-chain.md

@@ -77,7 +77,7 @@ Deneb is a consensus-layer upgrade containing a number of features. Including:
 
 | Name | Value | Description |
 | - | - | - |
-| `MAX_BLOB_COMMITMENTS_PER_BLOCK` | `uint64(2**12)` (= 4096) | *[New in Deneb:EIP4844]* hardfork independent fixed theoretical limit same as `LIMIT_BLOBS_PER_TX` (see EIP 4844) |
+| `MAX_BLOB_COMMITMENTS_PER_BLOCK` | `uint64(2**12)` (= 4096) | *[New in Deneb:EIP4844]* hardfork independent fixed theoretical limit same as `TARGET_BLOB_GAS_PER_BLOCK` (see EIP 4844) |
 
 ## Configuration