137 lines
4.9 KiB
Markdown
137 lines
4.9 KiB
Markdown
# Deneb -- Fork Logic
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## Table of contents
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<!-- START doctoc generated TOC please keep comment here to allow auto update -->
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<!-- DON'T EDIT THIS SECTION, INSTEAD RE-RUN doctoc TO UPDATE -->
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- [Introduction](#introduction)
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- [Configuration](#configuration)
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- [Helper functions](#helper-functions)
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- [Misc](#misc)
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- [Modified `compute_fork_version`](#modified-compute_fork_version)
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- [Fork to Deneb](#fork-to-deneb)
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- [Fork trigger](#fork-trigger)
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- [Upgrading the state](#upgrading-the-state)
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<!-- END doctoc generated TOC please keep comment here to allow auto update -->
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## Introduction
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This document describes the process of Deneb upgrade.
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## Configuration
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Warning: this configuration is not definitive.
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| Name | Value |
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| - | - |
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| `DENEB_FORK_VERSION` | `Version('0x04000000')` |
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| `DENEB_FORK_EPOCH` | `Epoch(269568)` (March 13, 2024, 01:55:35pm UTC) |
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## Helper functions
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### Misc
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#### Modified `compute_fork_version`
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```python
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def compute_fork_version(epoch: Epoch) -> Version:
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"""
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Return the fork version at the given ``epoch``.
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"""
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if epoch >= DENEB_FORK_EPOCH:
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return DENEB_FORK_VERSION
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if epoch >= CAPELLA_FORK_EPOCH:
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return CAPELLA_FORK_VERSION
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if epoch >= BELLATRIX_FORK_EPOCH:
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return BELLATRIX_FORK_VERSION
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if epoch >= ALTAIR_FORK_EPOCH:
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return ALTAIR_FORK_VERSION
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return GENESIS_FORK_VERSION
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```
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## Fork to Deneb
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### Fork trigger
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TBD. This fork is defined for testing purposes.
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For now, we assume the condition will be triggered at epoch `DENEB_FORK_EPOCH`.
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Note that for the pure Deneb networks, we don't apply `upgrade_to_deneb` since it starts with Deneb version logic.
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### Upgrading the state
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```python
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def upgrade_to_deneb(pre: capella.BeaconState) -> BeaconState:
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epoch = capella.get_current_epoch(pre)
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latest_execution_payload_header = ExecutionPayloadHeader(
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parent_hash=pre.latest_execution_payload_header.parent_hash,
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fee_recipient=pre.latest_execution_payload_header.fee_recipient,
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state_root=pre.latest_execution_payload_header.state_root,
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receipts_root=pre.latest_execution_payload_header.receipts_root,
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logs_bloom=pre.latest_execution_payload_header.logs_bloom,
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prev_randao=pre.latest_execution_payload_header.prev_randao,
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block_number=pre.latest_execution_payload_header.block_number,
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gas_limit=pre.latest_execution_payload_header.gas_limit,
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gas_used=pre.latest_execution_payload_header.gas_used,
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timestamp=pre.latest_execution_payload_header.timestamp,
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extra_data=pre.latest_execution_payload_header.extra_data,
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base_fee_per_gas=pre.latest_execution_payload_header.base_fee_per_gas,
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block_hash=pre.latest_execution_payload_header.block_hash,
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transactions_root=pre.latest_execution_payload_header.transactions_root,
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withdrawals_root=pre.latest_execution_payload_header.withdrawals_root,
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blob_gas_used=uint64(0), # [New in Deneb:EIP4844]
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excess_blob_gas=uint64(0), # [New in Deneb:EIP4844]
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)
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post = BeaconState(
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# Versioning
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genesis_time=pre.genesis_time,
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genesis_validators_root=pre.genesis_validators_root,
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slot=pre.slot,
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fork=Fork(
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previous_version=pre.fork.current_version,
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current_version=DENEB_FORK_VERSION, # [Modified in Deneb]
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epoch=epoch,
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),
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# History
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latest_block_header=pre.latest_block_header,
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block_roots=pre.block_roots,
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state_roots=pre.state_roots,
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historical_roots=pre.historical_roots,
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# Eth1
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eth1_data=pre.eth1_data,
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eth1_data_votes=pre.eth1_data_votes,
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eth1_deposit_index=pre.eth1_deposit_index,
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# Registry
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validators=pre.validators,
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balances=pre.balances,
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# Randomness
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randao_mixes=pre.randao_mixes,
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# Slashings
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slashings=pre.slashings,
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# Participation
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previous_epoch_participation=pre.previous_epoch_participation,
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current_epoch_participation=pre.current_epoch_participation,
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# Finality
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justification_bits=pre.justification_bits,
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previous_justified_checkpoint=pre.previous_justified_checkpoint,
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current_justified_checkpoint=pre.current_justified_checkpoint,
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finalized_checkpoint=pre.finalized_checkpoint,
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# Inactivity
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inactivity_scores=pre.inactivity_scores,
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# Sync
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current_sync_committee=pre.current_sync_committee,
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next_sync_committee=pre.next_sync_committee,
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# Execution-layer
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latest_execution_payload_header=latest_execution_payload_header, # [Modified in Deneb:EIP4844]
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# Withdrawals
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next_withdrawal_index=pre.next_withdrawal_index,
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next_withdrawal_validator_index=pre.next_withdrawal_validator_index,
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# Deep history valid from Capella onwards
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historical_summaries=pre.historical_summaries,
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)
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return post
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```
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