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eth2.0-specs
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Merge branch 'dev' into rewards-rework

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Danny Ryan 2020-05-01 10:52:19 -06:00
parent cd27e5e045 4b4fc32f9c
commit c2c27791c5
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2 changed files with 3 additions and 2 deletions
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3
specs/phase0/fork-choice.md
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@ -273,13 +273,12 @@ def validate_on_attestation(store: Store, attestation: Attestation) -> None:
current_epoch = compute_epoch_at_slot(get_current_slot(store))
# Use GENESIS_EPOCH for previous when genesis to avoid underflow
previous_epoch = current_epoch - 1 if current_epoch > GENESIS_EPOCH else GENESIS_EPOCH
# If attestation target is from a future epoch, delay consideration until the epoch arrives
assert target.epoch in [current_epoch, previous_epoch]
assert target.epoch == compute_epoch_at_slot(attestation.data.slot)
# Attestations target be for a known block. If target block is unknown, delay consideration until the block is found
assert target.root in store.blocks
# Attestations cannot be from future epochs. If they are, delay consideration until the epoch arrives
assert get_current_slot(store) >= compute_start_slot_at_epoch(target.epoch)
# Attestations must be for a known block. If block is unknown, delay consideration until the block is found
assert attestation.data.beacon_block_root in store.blocks

2
specs/phase0/validator.md
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@ -524,6 +524,8 @@ Because Phase 0 does not have shards and thus does not have Shard Committees, th
* Maintain advertisement of the randomly selected subnets in their node's ENR `attnets` entry by setting the randomly selected `subnet_id` bits to `True` (e.g. `ENR["attnets"][subnet_id] = True`) for all persistent attestation subnets
* Set the lifetime of each random subscription to a random number of epochs between `EPOCHS_PER_RANDOM_SUBNET_SUBSCRIPTION` and `2 * EPOCHS_PER_RANDOM_SUBNET_SUBSCRIPTION]`. At the end of life for a subscription, select a new random subnet, update subnet subscriptions, and publish an updated ENR
*Note*: Short lived beacon committee assignments should not be added in into the ENR `attnets` entry.
*Note*: When preparing for a hard fork, a validator must select and subscribe to random subnets of the future fork versioning at least `EPOCHS_PER_RANDOM_SUBNET_SUBSCRIPTION` epochs in advance of the fork. These new subnets for the fork are maintained in addition to those for the current fork until the fork occurs. After the fork occurs, let the subnets from the previous fork reach the end of life with no replacements.
## How to avoid slashing