40 lines
1.5 KiB
Markdown
40 lines
1.5 KiB
Markdown
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# Phase 0 -- Honest Validator
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This is an accompanying document to [Phase 0 -- The Beacon Chain](./beacon-chain.md), which describes the expected actions of a "validator" participating in the Ethereum proof-of-stake protocol.
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## Table of contents
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<!-- TOC -->
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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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- [Beacon chain responsibilities](#beacon-chain-responsibilities)
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- [Attestation aggregation](#attestation-aggregation)
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- [Aggregation selection](#aggregation-selection)
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<!-- END doctoc generated TOC please keep comment here to allow auto update -->
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<!-- /TOC -->
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## Introduction
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This document represents the changes to be made in the code of an "honest validator" to implement Deneb.
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## Beacon chain responsibilities
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### Attestation aggregation
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#### Aggregation selection
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Aggregator selection is now balance based. `state` is the `BeaconState` at the previous epoch of `slot` to allow lookahead.
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```python
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def is_aggregator(state: BeaconState, slot: Slot, index: CommitteeIndex, slot_signature: BLSSignature) -> bool:
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committee = get_beacon_committee(state, slot, index)
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committee_balance = get_total_balance(state, set(committee))
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balance = state.balances[validator]
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modulo = max(1, committee_balance // balance // TARGET_AGGREGATORS_PER_COMMITTEE)
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return bytes_to_uint64(hash(slot_signature)[0:8]) % modulo == 0
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```
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