Add `PeerDAS` feature

.gitignore

@@ -24,6 +24,7 @@ tests/core/pyspec/eth2spec/deneb/
 tests/core/pyspec/eth2spec/eip6110/
 tests/core/pyspec/eth2spec/eip7002/
 tests/core/pyspec/eth2spec/whisk/
+tests/core/pyspec/eth2spec/peerdas/
 
 # coverage reports
 .htmlcov

Makefile

@@ -35,7 +35,7 @@ MARKDOWN_FILES = $(wildcard $(SPEC_DIR)/*/*.md) \
                  $(wildcard $(SPEC_DIR)/_features/*/*/*.md) \
                  $(wildcard $(SSZ_DIR)/*.md)
 
-ALL_EXECUTABLE_SPEC_NAMES = phase0 altair bellatrix capella deneb eip6110 eip7002 whisk
+ALL_EXECUTABLE_SPEC_NAMES = phase0 altair bellatrix capella deneb eip6110 eip7002 whisk peerdas
 # The parameters for commands. Use `foreach` to avoid listing specs again.
 COVERAGE_SCOPE := $(foreach S,$(ALL_EXECUTABLE_SPEC_NAMES), --cov=eth2spec.$S.$(TEST_PRESET_TYPE))
 PYLINT_SCOPE := $(foreach S,$(ALL_EXECUTABLE_SPEC_NAMES), ./eth2spec/$S)

configs/mainnet.yaml

@@ -154,3 +154,7 @@ BLOB_SIDECAR_SUBNET_COUNT: 6
 WHISK_EPOCHS_PER_SHUFFLING_PHASE: 256
 # `Epoch(2)`
 WHISK_PROPOSER_SELECTION_GAP: 2
+
+# PEERDAS
+PEERDAS_FORK_VERSION: 0x06000001
+PEERDAS_FORK_EPOCH: 18446744073709551615

configs/minimal.yaml

@@ -153,3 +153,7 @@ BLOB_SIDECAR_SUBNET_COUNT: 6
 # Whisk
 WHISK_EPOCHS_PER_SHUFFLING_PHASE: 4
 WHISK_PROPOSER_SELECTION_GAP: 1
+
+# PEERDAS
+PEERDAS_FORK_VERSION: 0x06000001
+PEERDAS_FORK_EPOCH: 18446744073709551615

pysetup/constants.py

@@ -7,6 +7,7 @@ DENEB = 'deneb'
 EIP6110 = 'eip6110'
 EIP7002 = 'eip7002'
 WHISK = 'whisk'
+PEERDAS = 'peerdas'
 
 
 

pysetup/md_doc_paths.py

@@ -9,6 +9,7 @@ from .constants import (
     EIP6110,
     WHISK,
     EIP7002,
+    PEERDAS,
 )
 
 
@@ -21,6 +22,7 @@ PREVIOUS_FORK_OF = {
     EIP6110: DENEB,
     WHISK: CAPELLA,
     EIP7002: CAPELLA,
+    PEERDAS: DENEB,
 }
 
 ALL_FORKS = list(PREVIOUS_FORK_OF.keys())

pysetup/spec_builders/__init__.py

@@ -6,12 +6,13 @@ from .deneb import DenebSpecBuilder
 from .eip6110 import EIP6110SpecBuilder
 from .eip7002 import EIP7002SpecBuilder
 from .whisk import WhiskSpecBuilder
+from .peerdas import PeerDASSpecBuilder
 
 
 spec_builders = {
     builder.fork: builder
     for builder in (
         Phase0SpecBuilder, AltairSpecBuilder, BellatrixSpecBuilder, CapellaSpecBuilder, DenebSpecBuilder,
-        EIP6110SpecBuilder, EIP7002SpecBuilder, WhiskSpecBuilder,
+        EIP6110SpecBuilder, EIP7002SpecBuilder, WhiskSpecBuilder, PeerDASSpecBuilder,
     )
 }

pysetup/spec_builders/peerdas.py

@@ -0,0 +1,14 @@
+from typing import Dict
+
+from .base import BaseSpecBuilder
+from ..constants import PEERDAS
+
+
+class PeerDASSpecBuilder(BaseSpecBuilder):
+    fork: str = PEERDAS
+
+    @classmethod
+    def imports(cls, preset_name: str):
+        return f'''
+from eth2spec.deneb import {preset_name} as deneb
+'''

specs/_features/peerdas/fork.md

@@ -0,0 +1,125 @@
+# PeerDAS -- Fork Logic
+
+**Notice**: This document is a work-in-progress for researchers and implementers.
+
+## Table of contents
+
+<!-- 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)
+- [Helper functions](#helper-functions)
+  - [Misc](#misc)
+    - [Modified `compute_fork_version`](#modified-compute_fork_version)
+- [Fork to PeerDAS](#fork-to-peerdas)
+  - [Fork trigger](#fork-trigger)
+  - [Upgrading the state](#upgrading-the-state)
+
+<!-- END doctoc generated TOC please keep comment here to allow auto update -->
+
+## Introduction
+
+This document describes the process of PeerDAS upgrade.
+
+## Configuration
+
+Warning: this configuration is not definitive.
+
+| Name | Value |
+| - | - |
+| `PEERDAS_FORK_VERSION` | `Version('0x05000000')` |
+| `PEERDAS_FORK_EPOCH` | `Epoch(18446744073709551615)` **TBD** |
+
+## Helper functions
+
+### Misc
+
+#### Modified `compute_fork_version`
+
+```python
+def compute_fork_version(epoch: Epoch) -> Version:
+    """
+    Return the fork version at the given ``epoch``.
+    """
+    if epoch >= PEERDAS_FORK_EPOCH:
+        return PEERDAS_FORK_VERSION
+    if epoch >= DENEB_FORK_EPOCH:
+        return DENEB_FORK_VERSION
+    if epoch >= CAPELLA_FORK_EPOCH:
+        return CAPELLA_FORK_VERSION
+    if epoch >= BELLATRIX_FORK_EPOCH:
+        return BELLATRIX_FORK_VERSION
+    if epoch >= ALTAIR_FORK_EPOCH:
+        return ALTAIR_FORK_VERSION
+    return GENESIS_FORK_VERSION
+```
+
+## Fork to PeerDAS
+
+### Fork trigger
+
+PeerDAS does not need a hard fork. We only add this fork doc for compiling this new feature in pyspec.
+
+For now, we assume the condition will be triggered at epoch `PEERDAS_FORK_EPOCH`.
+
+Note that for the pure PeerDAS networks, we don't apply `upgrade_to_peerdas` since it starts with PeerDAS version logic.
+
+### Upgrading the state
+
+If `state.slot % SLOTS_PER_EPOCH == 0` and `compute_epoch_at_slot(state.slot) == PEERDAS_FORK_EPOCH`,
+an irregular state change is made to upgrade to PeerDAS.
+
+```python
+def upgrade_to_peerdas(pre: deneb.BeaconState) -> BeaconState:
+    epoch = deneb.get_current_epoch(pre)
+    post = BeaconState(
+        # Versioning
+        genesis_time=pre.genesis_time,
+        genesis_validators_root=pre.genesis_validators_root,
+        slot=pre.slot,
+        fork=Fork(
+            previous_version=pre.fork.current_version,
+            current_version=PEERDAS_FORK_VERSION,  # [Modified in PeerDAS]
+            epoch=epoch,
+        ),
+        # History
+        latest_block_header=pre.latest_block_header,
+        block_roots=pre.block_roots,
+        state_roots=pre.state_roots,
+        historical_roots=pre.historical_roots,
+        # Eth1
+        eth1_data=pre.eth1_data,
+        eth1_data_votes=pre.eth1_data_votes,
+        eth1_deposit_index=pre.eth1_deposit_index,
+        # Registry
+        validators=pre.validators,
+        balances=pre.balances,
+        # Randomness
+        randao_mixes=pre.randao_mixes,
+        # Slashings
+        slashings=pre.slashings,
+        # Participation
+        previous_epoch_participation=pre.previous_epoch_participation,
+        current_epoch_participation=pre.current_epoch_participation,
+        # Finality
+        justification_bits=pre.justification_bits,
+        previous_justified_checkpoint=pre.previous_justified_checkpoint,
+        current_justified_checkpoint=pre.current_justified_checkpoint,
+        finalized_checkpoint=pre.finalized_checkpoint,
+        # Inactivity
+        inactivity_scores=pre.inactivity_scores,
+        # Sync
+        current_sync_committee=pre.current_sync_committee,
+        next_sync_committee=pre.next_sync_committee,
+        # Execution-layer
+        latest_execution_payload_header=pre.latest_execution_payload_header,
+        # Withdrawals
+        next_withdrawal_index=pre.next_withdrawal_index,
+        next_withdrawal_validator_index=pre.next_withdrawal_validator_index,
+        # Deep history valid from Capella onwards
+        historical_summaries=pre.historical_summaries,
+    )
+
+    return post
+```

tests/core/pyspec/eth2spec/test/helpers/constants.py

@@ -19,6 +19,7 @@ DAS = SpecForkName('das')
 EIP6110 = SpecForkName('eip6110')
 EIP7002 = SpecForkName('eip7002')
 WHISK = SpecForkName('whisk')
+PEERDAS = SpecForkName('peerdas')
 
 #
 # SpecFork settings
@@ -37,6 +38,7 @@ ALL_PHASES = (
     # Experimental patches
     EIP6110,
     EIP7002,
+    PEERDAS,
 )
 # The forks that have light client specs
 LIGHT_CLIENT_TESTING_FORKS = (*[item for item in MAINNET_FORKS if item != PHASE0], DENEB)
@@ -57,6 +59,7 @@ PREVIOUS_FORK_OF = {
     EIP6110: DENEB,
     WHISK: CAPELLA,
     EIP7002: CAPELLA,
+    PEERDAS: DENEB,
 }
 
 # For fork transition tests