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clarify active validator meaning for rewards/penalties

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Danny Ryan 2019-02-10 18:43:56 -07:00
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specs/core/0_beacon-chain.md
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@ -1858,9 +1858,11 @@ First, we define some additional helpers:
* Let `base_reward(state, index) = get_effective_balance(state, index) // base_reward_quotient // 5` for any validator with the given `index`.
* Let `inactivity_penalty(state, index, epochs_since_finality) = base_reward(state, index) + get_effective_balance(state, index) * epochs_since_finality // INACTIVITY_PENALTY_QUOTIENT // 2` for any validator with the given `index`.
Note: When applying penalties in the following balance recalculations implementers should make sure the `uint64` does not underflow.
##### Justification and finalization
Note: When applying penalties in the following balance recalculations implementers should make sure the `uint64` does not underflow.
Note: Rewards and penalties are for participation in the previous epoch, so the "active validator" set is drawn from `get_active_validator_indices(state.validator_registry, previous_epoch)`.
* Let `epochs_since_finality = next_epoch - state.finalized_epoch`.
@ -1883,7 +1885,7 @@ Case 2: `epochs_since_finality > 4`:
* Any [active validator](#dfn-active-validator) `index` not in `previous_epoch_attester_indices`, loses `inactivity_penalty(state, index, epochs_since_finality)`.
* Any [active validator](#dfn-active-validator) `index` not in `previous_epoch_boundary_attester_indices`, loses `inactivity_penalty(state, index, epochs_since_finality)`.
* Any [active validator](#dfn-active-validator) `index` not in `previous_epoch_head_attester_indices`, loses `base_reward(state, index)`.
* Any [active_validator](#dfn-active-validator) `index` with `validator.penalized_epoch <= current_epoch`, loses `2 * inactivity_penalty(state, index, epochs_since_finality) + base_reward(state, index)`.
* Any [active validator](#dfn-active-validator) `index` with `validator.penalized_epoch <= current_epoch`, loses `2 * inactivity_penalty(state, index, epochs_since_finality) + base_reward(state, index)`.
* Any [validator](#dfn-validator) `index` in `previous_epoch_attester_indices` loses `base_reward(state, index) - base_reward(state, index) * MIN_ATTESTATION_INCLUSION_DELAY // inclusion_distance(state, index)`
##### Attestation inclusion