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Fix outdated `fork.slot` and `attestation_data.slot`

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Hsiao-Wei Wang 2019-07-01 10:58:09 +08:00
parent f7ed186447
commit 4f360a58e2
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GPG Key ID: 95B070122902DEA4
1 changed files with 5 additions and 5 deletions
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10
specs/validator/0_beacon-chain-validator.md
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@ -212,7 +212,7 @@ epoch_signature = bls_sign(
privkey=validator.privkey, # privkey stored locally, not in state
message_hash=hash_tree_root(compute_epoch_of_slot(block.slot)),
domain=get_domain(
fork=fork, # `fork` is the fork object at the slot `block.slot`
fork=fork, # `fork` is the fork object at the epoch `compute_epoch_of_slot(block.slot)`
epoch=compute_epoch_of_slot(block.slot),
domain_type=DOMAIN_RANDAO,
)
@ -251,7 +251,7 @@ block_signature = bls_sign(
privkey=validator.privkey, # privkey store locally, not in state
message_hash=signing_root(block),
domain=get_domain(
fork=fork, # `fork` is the fork object at the slot `block.slot`
fork=fork, # `fork` is the fork object at the epoch `compute_epoch_of_slot(block.slot)`
epoch=compute_epoch_of_slot(block.slot),
domain_type=DOMAIN_BEACON_BLOCK,
)
@ -355,8 +355,8 @@ signed_attestation_data = bls_sign(
privkey=validator.privkey, # privkey stored locally, not in state
message_hash=attestation_message,
domain=get_domain(
fork=fork, # `fork` is the fork object at the slot, `attestation_data.slot`
epoch=compute_epoch_of_slot(attestation_data.slot),
fork=fork, # `fork` is the fork object at epoch `target.epoch`
epoch=target.epoch,
domain_type=DOMAIN_ATTESTATION,
)
)
@ -387,7 +387,7 @@ To avoid "attester slashings", a validator must not sign two conflicting [`Attes
Specifically, when signing an `Attestation`, a validator should perform the following steps in the following order:
1. Save a record to hard disk that an attestation has been signed for source (i.e. `attestation_data.source.epoch`) and target (i.e. `compute_epoch_of_slot(attestation_data.slot)`).
1. Save a record to hard disk that an attestation has been signed for source (i.e. `attestation_data.source.epoch`) and target (i.e. `attestation_data.target.epoch`).
2. Generate and broadcast attestation.
If the software crashes at some point within this routine, then when the validator comes back online, the hard disk has the record of the *potentially* signed/broadcast attestation and can effectively avoid slashing.