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eth2.0-specs
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Rename `bytes1(x)`, `bytes2(x)`... function to `int_to_bytes1(x)`, `int_to_bytes2(x)`...

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Hsiao-Wei Wang 2019-01-17 16:30:04 +08:00
parent 51ba0c4008
commit 23e3f4defe
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2 changed files with 8 additions and 8 deletions
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14
specs/core/0_beacon-chain.md
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@ -75,7 +75,7 @@
- [`get_beacon_proposer_index`](#get_beacon_proposer_index)
- [`merkle_root`](#merkle_root)
- [`get_attestation_participants`](#get_attestation_participants)
- [`bytes1`, `bytes2`, ...](#bytes1-bytes2-)
- [`int_to_bytes1`, `int_to_bytes2`, ...](#int_to_bytes1-int_to_bytes2-)
- [`get_effective_balance`](#get_effective_balance)
- [`get_fork_version`](#get_fork_version)
- [`get_domain`](#get_domain)
@ -190,9 +190,9 @@ Unless otherwise indicated, code appearing in `this style` is to be interpreted
| `GENESIS_SLOT` | `0` |
| `GENESIS_START_SHARD` | `0` |
| `FAR_FUTURE_SLOT` | `2**64 - 1` |
| `ZERO_HASH` | `bytes32(0)` |
| `EMPTY_SIGNATURE` | `[bytes48(0), bytes48(0)]` |
| `BLS_WITHDRAWAL_PREFIX_BYTE` | `bytes1(0)` |
| `ZERO_HASH` | `int_to_bytes32(0)` |
| `EMPTY_SIGNATURE` | `[int_to_bytes48(0), int_to_bytes48(0)]` |
| `BLS_WITHDRAWAL_PREFIX_BYTE` | `int_to_bytes1(0)` |
### Time parameters
@ -894,7 +894,7 @@ def get_shuffling(seed: Hash32,
committees_per_slot = get_committee_count_per_slot(len(active_validator_indices))
# Shuffle
seed = xor(seed, bytes32(slot))
seed = xor(seed, int_to_bytes32(slot))
shuffled_active_validator_indices = shuffle(active_validator_indices, seed)
# Split the shuffled list into epoch_length * committees_per_slot pieces
@ -1046,9 +1046,9 @@ def get_attestation_participants(state: BeaconState,
return participants
```
#### `bytes1`, `bytes2`, ...
#### `int_to_bytes1`, `int_to_bytes2`, ...
`bytes1(x): return x.to_bytes(1, 'big')`, `bytes2(x): return x.to_bytes(2, 'big')`, and so on for all integers, particularly 1, 2, 3, 4, 8, 32.
`int_to_bytes1(x): return x.to_bytes(1, 'big')`, `int_to_bytes2(x): return x.to_bytes(2, 'big')`, and so on for all integers, particularly 1, 2, 3, 4, 8, 32.
#### `get_effective_balance`

2
specs/core/1_shard-data-chains.md
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@ -70,7 +70,7 @@ To validate a block header on shard `shard_id`, compute as follows:
* Verify that `beacon_chain_ref` is the hash of a block in the beacon chain with slot less than or equal to `slot`. Verify that `beacon_chain_ref` is equal to or a descendant of the `beacon_chain_ref` specified in the `ShardBlock` pointed to by `parent_root`.
* Let `state` be the state of the beacon chain block referred to by `beacon_chain_ref`. Let `validators` be `[validators[i] for i in state.current_persistent_committees[shard_id]]`.
* Assert `len(participation_bitfield) == ceil_div8(len(validators))`
* Let `proposer_index = hash(state.randao_mix + bytes8(shard_id) + bytes8(slot)) % len(validators)`. Let `msg` be the block but with the `block.signature` set to `[0, 0]`. Verify that `BLSVerify(pub=validators[proposer_index].pubkey, msg=hash(msg), sig=block.signature, domain=get_domain(state, slot, SHARD_PROPOSER_DOMAIN))` passes.
* Let `proposer_index = hash(state.randao_mix + int_to_bytes8(shard_id) + int_to_bytes8(slot)) % len(validators)`. Let `msg` be the block but with the `block.signature` set to `[0, 0]`. Verify that `BLSVerify(pub=validators[proposer_index].pubkey, msg=hash(msg), sig=block.signature, domain=get_domain(state, slot, SHARD_PROPOSER_DOMAIN))` passes.
* Generate the `group_public_key` by adding the public keys of all the validators for whom the corresponding position in the bitfield is set to 1. Verify that `BLSVerify(pub=group_public_key, msg=parent_root, sig=block.aggregate_signature, domain=get_domain(state, slot, SHARD_ATTESTER_DOMAIN))` passes.
### Block Merklization helper