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eth2.0-specs
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add GENESIS_FORK_VERSION and make associated modifications to support configuration of this variable

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Danny Ryan 2020-01-03 17:48:03 -07:00
parent 7b1a609335
commit 6dbc02031d
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4 changed files with 13 additions and 2 deletions
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2
configs/mainnet.yaml
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@ -63,6 +63,8 @@ EFFECTIVE_BALANCE_INCREMENT: 1000000000
# ---------------------------------------------------------------
# 0, GENESIS_EPOCH is derived from this constant
GENESIS_SLOT: 0
# Mainnet initial fork version, recommend altering for testnets
GENESIS_FORK_VERSION: 0x00000000
BLS_WITHDRAWAL_PREFIX: 0x00

2
configs/minimal.yaml
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@ -63,6 +63,8 @@ EFFECTIVE_BALANCE_INCREMENT: 1000000000
# ---------------------------------------------------------------
# 0, GENESIS_EPOCH is derived from this constant
GENESIS_SLOT: 0
# Highest byte set to 0x01 to avoid collisions with mainnet versioning
GENESIS_FORK_VERSION: 0x00000001
BLS_WITHDRAWAL_PREFIX: 0x00

9
specs/core/0_beacon-chain.md
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@ -199,6 +199,7 @@ The following values are (non-configurable) constants used throughout the specif
| - | - |
| `GENESIS_SLOT` | `Slot(0)` |
| `GENESIS_EPOCH` | `Epoch(0)` |
| `GENESIS_FORK_VERSION` | `Version('0x00000000')` |
| `BLS_WITHDRAWAL_PREFIX` | `Bytes1('0x00')` |
### Time parameters
@ -780,7 +781,7 @@ def compute_activation_exit_epoch(epoch: Epoch) -> Epoch:
#### `compute_domain`
```python
def compute_domain(domain_type: DomainType, fork_version: Version=Version()) -> Domain:
def compute_domain(domain_type: DomainType, fork_version: Version=GENESIS_FORK_VERSION) -> Domain:
"""
Return the domain for the ``domain_type`` and ``fork_version``.
"""
@ -1063,8 +1064,14 @@ Before the Ethereum 2.0 genesis has been triggered, and for every Ethereum 1.0 b
def initialize_beacon_state_from_eth1(eth1_block_hash: Bytes32,
eth1_timestamp: uint64,
deposits: Sequence[Deposit]) -> BeaconState:
fork = Fork(
previous_version=GENESIS_FORK_VERSION,
current_version=GENESIS_FORK_VERSION,
epoch=GENESIS_EPOCH,
)
state = BeaconState(
genesis_time=eth1_timestamp - eth1_timestamp % SECONDS_PER_DAY + 2 * SECONDS_PER_DAY,
fork=fork,
eth1_data=Eth1Data(block_hash=eth1_block_hash, deposit_count=len(deposits)),
latest_block_header=BeaconBlockHeader(body_root=hash_tree_root(BeaconBlockBody())),
randao_mixes=[eth1_block_hash] * EPOCHS_PER_HISTORICAL_VECTOR, # Seed RANDAO with Eth1 entropy

2
specs/validator/0_beacon-chain-validator.md
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@ -117,7 +117,7 @@ To submit a deposit:
- Set `deposit_data.withdrawal_credentials` to `withdrawal_credentials`.
- Set `deposit_data.amount` to `amount`.
- Let `deposit_message` be a `DepositMessage` with all the `DepositData` contents except the `signature`.
- Let `signature` be the result of `bls_sign` of the `hash_tree_root(deposit_message)` with `domain=compute_domain(DOMAIN_DEPOSIT)`. (Deposits are valid regardless of fork version, `compute_domain` will default to zeroes there).
- Let `signature` be the result of `bls_sign` of the `hash_tree_root(deposit_message)` with `domain=compute_domain(DOMAIN_DEPOSIT)`. (_Warning_: Deposits _must_ be signed with `GENESIS_FORK_VERSION`, calling `compute_domain` without a second argument defaults to the correct version).
- Let `deposit_data_root` be `hash_tree_root(deposit_data)`.
- Send a transaction on the Ethereum 1.0 chain to `DEPOSIT_CONTRACT_ADDRESS` executing `def deposit(pubkey: bytes[48], withdrawal_credentials: bytes[32], signature: bytes[96], deposit_data_root: bytes32)` along with a deposit of `amount` Gwei.