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Fix outdated `fork.slot` and `attestation_data.slot`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 privkey=validator.privkey, # privkey stored locally, not in state
message_hash=hash_tree_root(compute_epoch_of_slot(block.slot)), message_hash=hash_tree_root(compute_epoch_of_slot(block.slot)),
domain=get_domain( 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), epoch=compute_epoch_of_slot(block.slot),
domain_type=DOMAIN_RANDAO, domain_type=DOMAIN_RANDAO,
) )
@ -251,7 +251,7 @@ block_signature = bls_sign(
privkey=validator.privkey, # privkey store locally, not in state privkey=validator.privkey, # privkey store locally, not in state
message_hash=signing_root(block), message_hash=signing_root(block),
domain=get_domain( 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), epoch=compute_epoch_of_slot(block.slot),
domain_type=DOMAIN_BEACON_BLOCK, domain_type=DOMAIN_BEACON_BLOCK,
) )
@ -355,8 +355,8 @@ signed_attestation_data = bls_sign(
privkey=validator.privkey, # privkey stored locally, not in state privkey=validator.privkey, # privkey stored locally, not in state
message_hash=attestation_message, message_hash=attestation_message,
domain=get_domain( domain=get_domain(
fork=fork, # `fork` is the fork object at the slot, `attestation_data.slot` fork=fork, # `fork` is the fork object at epoch `target.epoch`
epoch=compute_epoch_of_slot(attestation_data.slot), epoch=target.epoch,
domain_type=DOMAIN_ATTESTATION, 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: 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. 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. 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.