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eth2.0-specs
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Hsiao-Wei Wang 2018-11-27 23:54:09 +08:00
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specs/core/0_beacon-chain.md
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@ -906,16 +906,15 @@ Verify that there are at most `MAX_ATTESTATION_COUNT` `AttestationRecord` object
* Verify that `len(attester_bitfield) == ceil_div8(len(attestation_indices))`, where `ceil_div8 = (x + 7) // 8`. Verify that bits `len(attestation_indices)....` and higher, if present (i.e. `len(attestation_indices)` is not a multiple of 8), are all zero.
* Derive a `group_public_key` by adding the public keys of all of the attesters in `attestation_indices` for whom the corresponding bit in `attester_bitfield` (the ith bit is `(attester_bitfield[i // 8] >> (7 - (i % 8))) % 2`) equals 1.
* Let `data = AttestationSignedData(slot, shard, parent_hashes, shard_block_hash, last_crosslinked_hash, shard_block_combined_data_root, justified_slot)`.
* Check `BLSVerify(pubkey=group_public_key, msg=data, sig=aggregate_sig, domain=get_domain(state.pre_fork_version, state.post_fork_version, state.fork_slot_number, slot, DOMAIN_ATTESTATION))`.
* Check `BLSVerify(pubkey=group_public_key, msg=data, sig=aggregate_sig, domain=get_domain(state.fork_data, slot, DOMAIN_ATTESTATION))`.
* [TO BE REMOVED IN PHASE 1] Verify that `shard_block_hash == bytes([0] * 32)`.
Extend the list of `AttestationRecord` objects in the `state` with those included in the block, ordering the new additions in the same order as they came in the block.
### Verify proposer signature
Let `proposal_hash = hash(ProposalSignedData(block.slot, 2**64 - 1, block_hash_without_sig))` where `block_hash_without_sig` is the hash of the block except setting `proposer_signature` to `[0, 0]`.
Verify that `BLSVerify(pubkey=get_beacon_proposer(state, block.slot).pubkey, data=proposal_hash, sig=block.proposer_signature, domain=get_domain(state.pre_fork_version, state.post_fork_version, state.fork_slot_number, block.slot, DOMAIN_PROPOSAL))` passes.
* Let `proposal_hash = hash(ProposalSignedData(block.slot, 2**64 - 1, block_hash_without_sig))` where `block_hash_without_sig` is the hash of the block except setting `proposer_signature` to `[0, 0]`.
* Verify that `BLSVerify(pubkey=get_beacon_proposer(state, block.slot).pubkey, data=proposal_hash, sig=block.proposer_signature, domain=get_domain(state.fork_data, block.slot, DOMAIN_PROPOSAL))` passes.
### Verify and process RANDAO reveal
@ -953,10 +952,9 @@ For each `SpecialRecord` `obj` in `block.specials`, verify that its `kind` is on
}
```
Perform the following checks:
* Verify that `BLSVerify(pubkey=validators[data.validator_index].pubkey, msg=bytes([0] * 32), sig=data.signature, domain=get_domain(state.pre_fork_version, state.post_fork_version, state.fork_slot_number, current_slot, DOMAIN_LOGOUT))`
* Verify that `BLSVerify(pubkey=validators[data.validator_index].pubkey, msg=bytes([0] * 32), sig=data.signature, domain=get_domain(state.fork_data, current_slot, DOMAIN_LOGOUT))`.
* Verify that `validators[validator_index].status == ACTIVE`.
* Verify that `block.slot >= last_status_change_slot + SHARD_PERSISTENT_COMMITTEE_CHANGE_PERIOD`
* Verify that `block.slot >= last_status_change_slot + SHARD_PERSISTENT_COMMITTEE_CHANGE_PERIOD`.
Run `exit_validator(data.validator_index, state, block, penalize=False, current_slot=block.slot)`.
@ -975,7 +973,7 @@ Run `exit_validator(data.validator_index, state, block, penalize=False, current_
Perform the following checks:
* For each `vote`, verify that `BLSVerify(pubkey=aggregate_pubkey([validators[i].pubkey for i in vote_aggregate_sig_indices]), msg=vote_data, sig=vote_aggregate_sig, domain=get_domain(state.pre_fork_version, state.post_fork_version, state.fork_slot_number, vote_data.slot, DOMAIN_ATTESTATION))` passes.
* For each `vote`, verify that `BLSVerify(pubkey=aggregate_pubkey([validators[i].pubkey for i in vote_aggregate_sig_indices]), msg=vote_data, sig=vote_aggregate_sig, domain=get_domain(state.fork_data, vote_data.slot, DOMAIN_ATTESTATION))` passes.
* Verify that `vote1_data != vote2_data`.
* Let `intersection = [x for x in vote1_aggregate_sig_indices if x in vote2_aggregate_sig_indices]`. Verify that `len(intersection) >= 1`.
* Verify that `vote1_data.justified_slot < vote2_data.justified_slot < vote2_data.slot <= vote1_data.slot`.
@ -993,7 +991,7 @@ For each validator index `v` in `intersection`, if `state.validators[v].status`
'proposal1_signature': '[uint384]',
}
```
For each `proposal_signature`, verify that `BLSVerify(pubkey=validators[proposer_index].pubkey, msg=hash(proposal_data), sig=proposal_signature, domain=get_domain(state.pre_fork_version, state.post_fork_version, state.fork_slot_number, proposal_data.slot, DOMAIN_PROPOSAL))` passes. Verify that `proposal1_data.slot == proposal2_data.slot` but `proposal1 != proposal2`. If `state.validators[proposer_index].status` does not equal `PENALIZED`, then run `exit_validator(proposer_index, state, penalize=True, current_slot=block.slot)`
For each `proposal_signature`, verify that `BLSVerify(pubkey=validators[proposer_index].pubkey, msg=hash(proposal_data), sig=proposal_signature, domain=get_domain(state.fork_data, proposal_data.slot, DOMAIN_PROPOSAL))` passes. Verify that `proposal1_data.slot == proposal2_data.slot` but `proposal1 != proposal2`. If `state.validators[proposer_index].status` does not equal `PENALIZED`, then run `exit_validator(proposer_index, state, penalize=True, current_slot=block.slot)`
#### DEPOSIT_PROOF