add beaconblockheader and body
This commit is contained in:
parent
39f0030fa2
commit
7f542ca714
|
@ -24,6 +24,8 @@
|
|||
- [Deposits](#deposits)
|
||||
- [`DepositParametersRecord`](#depositparametersrecord)
|
||||
- [Beacon chain blocks](#beacon-chain-blocks)
|
||||
- [`BeaconBlockHeader`](#beaconblock)
|
||||
- [`BeaconBlockBody`](#beaconblock)
|
||||
- [`BeaconBlock`](#beaconblock)
|
||||
- [`AttestationRecord`](#attestationrecord)
|
||||
- [`AttestationData`](#attestationdata)
|
||||
|
@ -244,27 +246,37 @@ Unless otherwise indicated, code appearing in `this style` is to be interpreted
|
|||
|
||||
### Beacon chain blocks
|
||||
|
||||
#### `BeaconBlockHeader`
|
||||
|
||||
```python
|
||||
{
|
||||
'slot': 'uint64',
|
||||
# Skip list of ancestor beacon block hashes
|
||||
# i'th item is the most recent ancestor whose slot is a multiple of 2**i for i = 0, ..., 31
|
||||
'ancestor_hashes': ['hash32'],
|
||||
'state_root': 'hash32',
|
||||
'randao_reveal': 'hash32',
|
||||
'deposit_receipt_root': 'hash32',
|
||||
'candidate_pow_receipt_root': 'hash32',
|
||||
'signature': ['uint384'],
|
||||
}
|
||||
```
|
||||
|
||||
#### `BeaconBlockBody`
|
||||
|
||||
```python
|
||||
{
|
||||
'attestations': [AttestationRecord],
|
||||
'specials': [SpecialRecord],
|
||||
}
|
||||
```
|
||||
|
||||
#### `BeaconBlock`
|
||||
|
||||
```python
|
||||
{
|
||||
# Slot number
|
||||
'slot': 'uint64',
|
||||
# Proposer RANDAO reveal
|
||||
'randao_reveal': 'hash32',
|
||||
# Candidate PoW receipt root
|
||||
'candidate_pow_receipt_root': 'hash32',
|
||||
# Skip list of ancestor beacon block hashes
|
||||
# i'th item is the most recent ancestor whose slot is a multiple of 2**i for i = 0, ..., 31
|
||||
'ancestor_hashes': ['hash32'],
|
||||
# State root
|
||||
'state_root': 'hash32',
|
||||
# Attestations
|
||||
'attestations': [AttestationRecord],
|
||||
# Specials (e.g. exits, penalties)
|
||||
'specials': [SpecialRecord],
|
||||
# Proposer signature
|
||||
'proposer_signature': ['uint384'],
|
||||
'header': BeaconBlockHeader,
|
||||
'body': BeaconBlockBody,
|
||||
}
|
||||
```
|
||||
|
||||
|
@ -637,10 +649,10 @@ Processing the beacon chain is similar to processing the Ethereum 1.0 chain. Cli
|
|||
|
||||
For a beacon chain block, `block`, to be processed by a node, the following conditions must be met:
|
||||
|
||||
* The parent block with hash `block.ancestor_hashes[0]` has been processed and accepted.
|
||||
* The node has processed its `state` up to slot, `block.slot - 1`.
|
||||
* The parent block with hash `block.header.ancestor_hashes[0]` has been processed and accepted.
|
||||
* The node has processed its `state` up to slot, `block.header.slot - 1`.
|
||||
* The Ethereum 1.0 block pointed to by the `state.processed_pow_receipt_root` has been processed and accepted.
|
||||
* The node's local clock time is greater than or equal to `state.genesis_time + block.slot * SLOT_DURATION`.
|
||||
* The node's local clock time is greater than or equal to `state.genesis_time + block.header.slot * SLOT_DURATION`.
|
||||
|
||||
If these conditions are not met, the client should delay processing the beacon block until the conditions are all satisfied.
|
||||
|
||||
|
@ -653,7 +665,7 @@ The beacon chain fork choice rule is a hybrid that combines justification and fi
|
|||
* Let `store` be the set of attestations and blocks that the [validator](#dfn-validator) `v` has observed and verified (in particular, block ancestors must be recursively verified). Attestations not part of any chain are still included in `store`.
|
||||
* Let `finalized_head` be the finalized block with the highest slot number. (A block `B` is finalized if there is a descendant of `B` in `store` the processing of which sets `B` as finalized.)
|
||||
* Let `justified_head` be the descendant of `finalized_head` with the highest slot number that has been justified for at least `EPOCH_LENGTH` slots. (A block `B` is justified if there is a descendant of `B` in `store` the processing of which sets `B` as justified.) If no such descendant exists set `justified_head` to `finalized_head`.
|
||||
* Let `get_ancestor(store, block, slot)` be the ancestor of `block` with slot number `slot`. The `get_ancestor` function can be defined recursively as `def get_ancestor(store, block, slot): return block if block.slot == slot else get_ancestor(store, store.get_parent(block), slot)`.
|
||||
* Let `get_ancestor(store, block, slot)` be the ancestor of `block` with slot number `slot`. The `get_ancestor` function can be defined recursively as `def get_ancestor(store, block, slot): return block if block.header.slot == slot else get_ancestor(store, store.get_parent(block), slot)`.
|
||||
* Let `get_latest_attestation(store, validator)` be the attestation with the highest slot number in `store` from `validator`. If several such attestations exist, use the one the [validator](#dfn-validator) `v` observed first.
|
||||
* Let `get_latest_attestation_target(store, validator)` be the target block in the attestation `get_latest_attestation(store, validator)`.
|
||||
* The head is `lmd_ghost(store, justified_head)` where the function `lmd_ghost` is defined below. Note that the implementation below is suboptimal; there are implementations that compute the head in time logarithmic in slot count.
|
||||
|
@ -667,7 +679,7 @@ def lmd_ghost(store, start):
|
|||
for validator in active_validators]
|
||||
def get_vote_count(block):
|
||||
return len([target for target in attestation_targets if
|
||||
get_ancestor(store, target, block.slot) == block])
|
||||
get_ancestor(store, target, block.header.slot) == block])
|
||||
|
||||
head = start
|
||||
while 1:
|
||||
|
@ -874,9 +886,9 @@ def get_beacon_proposer_index(state: BeaconState,
|
|||
```python
|
||||
def get_updated_ancestor_hashes(latest_block: BeaconBlock,
|
||||
latest_hash: Hash32) -> List[Hash32]:
|
||||
new_ancestor_hashes = copy.deepcopy(latest_block.ancestor_hashes)
|
||||
new_ancestor_hashes = copy.deepcopy(latest_block.header.ancestor_hashes)
|
||||
for i in range(32):
|
||||
if latest_block.slot % 2**i == 0:
|
||||
if latest_block.header.slot % 2**i == 0:
|
||||
new_ancestor_hashes[i] = latest_hash
|
||||
return new_ancestor_hashes
|
||||
```
|
||||
|
@ -1212,8 +1224,8 @@ Below are the processing steps that happen at every slot.
|
|||
|
||||
If there is a block from the proposer for `state.slot`, we process that incoming block:
|
||||
* Let `block` be that associated incoming block.
|
||||
* Verify that `block.slot == state.slot`
|
||||
* Verify that `block.ancestor_hashes` equals `get_updated_ancestor_hashes(latest_block, latest_hash)`.
|
||||
* Verify that `block.header.slot == state.slot`
|
||||
* Verify that `block.header.ancestor_hashes` equals `get_updated_ancestor_hashes(latest_block, latest_hash)`.
|
||||
|
||||
If there is no block from the proposer at state.slot:
|
||||
* Set `state.validator_registry[get_beacon_proposer_index(state, state.slot)].randao_skips += 1`.
|
||||
|
@ -1221,15 +1233,15 @@ If there is no block from the proposer at state.slot:
|
|||
|
||||
### Proposer signature
|
||||
|
||||
* Let `block_hash_without_sig` be the hash of `block` where `proposer_signature` is set to `[0, 0]`.
|
||||
* Let `block_hash_without_sig` be the hash of `block` where `block.header.signature` is set to `[0, 0]`.
|
||||
* Let `proposal_hash = hash(ProposalSignedData(state.slot, BEACON_CHAIN_SHARD_NUMBER, block_hash_without_sig))`.
|
||||
* Verify that `BLSVerify(pubkey=state.validator_registry[get_beacon_proposer_index(state, state.slot)].pubkey, data=proposal_hash, sig=block.proposer_signature, domain=get_domain(state.fork_data, state.slot, DOMAIN_PROPOSAL))`.
|
||||
* Verify that `BLSVerify(pubkey=state.validator_registry[get_beacon_proposer_index(state, state.slot)].pubkey, data=proposal_hash, sig=block.header.signature, domain=get_domain(state.fork_data, state.slot, DOMAIN_PROPOSAL))`.
|
||||
|
||||
### Attestations
|
||||
|
||||
* Verify that `len(block.attestations) <= MAX_ATTESTATIONS_PER_BLOCK`.
|
||||
* Verify that `len(block.body.attestations) <= MAX_ATTESTATIONS_PER_BLOCK`.
|
||||
|
||||
For each `attestation` in `block.attestations`:
|
||||
For each `attestation` in `block.body.attestations`:
|
||||
|
||||
* Verify that `attestation.data.slot <= state.slot - MIN_ATTESTATION_INCLUSION_DELAY`.
|
||||
* Verify that `attestation.data.slot >= max(state.slot - EPOCH_LENGTH, 0)`.
|
||||
|
@ -1247,22 +1259,22 @@ For each `attestation` in `block.attestations`:
|
|||
|
||||
* Let `repeat_hash(x, n) = x if n == 0 else repeat_hash(hash(x), n-1)`.
|
||||
* Let `proposer = state.validator_registry[get_beacon_proposer_index(state, state.slot)]`.
|
||||
* Verify that `repeat_hash(block.randao_reveal, proposer.randao_skips + 1) == proposer.randao_commitment`.
|
||||
* Set `state.randao_mix = xor(state.randao_mix, block.randao_reveal)`.
|
||||
* Set `proposer.randao_commitment = block.randao_reveal`.
|
||||
* Verify that `repeat_hash(block.header.randao_reveal, proposer.randao_skips + 1) == proposer.randao_commitment`.
|
||||
* Set `state.randao_mix = xor(state.randao_mix, block.header.randao_reveal)`.
|
||||
* Set `proposer.randao_commitment = block.header.randao_reveal`.
|
||||
* Set `proposer.randao_skips = 0`.
|
||||
|
||||
### PoW receipt root
|
||||
|
||||
* If `block.candidate_pow_receipt_root` is `x.candidate_pow_receipt_root` for some `x` in `state.candidate_pow_receipt_roots`, set `x.votes += 1`.
|
||||
* Otherwise, append to `state.candidate_pow_receipt_roots` a new `CandidatePoWReceiptRootRecord(candidate_pow_receipt_root=block.candidate_pow_receipt_root, votes=1)`.
|
||||
* If `block.header.candidate_pow_receipt_root` is `x.candidate_pow_receipt_root` for some `x` in `state.candidate_pow_receipt_roots`, set `x.votes += 1`.
|
||||
* Otherwise, append to `state.candidate_pow_receipt_roots` a new `CandidatePoWReceiptRootRecord(candidate_pow_receipt_root=block.header.candidate_pow_receipt_root, votes=1)`.
|
||||
|
||||
### Special objects
|
||||
|
||||
* Verify that the quantity of each type of object in `block.specials` is less than or equal to its maximum (see table at the top).
|
||||
* Verify that objects are sorted in order of `kind`. That is, `block.specials[i+1].kind >= block.specials[i].kind` for `0 <= i < len(block.specials-1)`.
|
||||
* Verify that the quantity of each type of object in `block.body.specials` is less than or equal to its maximum (see table at the top).
|
||||
* Verify that objects are sorted in order of `kind`. That is, `block.body.specials[i+1].kind >= block.body.specials[i].kind` for `0 <= i < len(block.body.specials-1)`.
|
||||
|
||||
For each `special` in `block.specials`:
|
||||
For each `special` in `block.body.specials`:
|
||||
|
||||
* Verify that `special.kind` is a valid value.
|
||||
* Verify that `special.data` deserializes according to the format for the given `kind` (see format definitions in "Data structures" above).
|
||||
|
@ -1592,7 +1604,7 @@ while len(state.persistent_committee_reassignments) > 0 and state.persistent_com
|
|||
|
||||
## State root processing
|
||||
|
||||
Verify `block.state_root == hash(state)` if there exists a `block` for the slot being processed.
|
||||
Verify `block.header.state_root == hash(state)` if there exists a `block` for the slot being processed.
|
||||
|
||||
# Appendix
|
||||
## Appendix A - Hash function
|
||||
|
|
Loading…
Reference in New Issue