nimbus-eth2/beacon_chain/interop.nim

60 lines
2.1 KiB
Nim

# beacon_chain
# Copyright (c) 2018-2022 Status Research & Development GmbH
# Licensed and distributed under either of
# * MIT license (license terms in the root directory or at https://opensource.org/licenses/MIT).
# * Apache v2 license (license terms in the root directory or at https://www.apache.org/licenses/LICENSE-2.0).
# at your option. This file may not be copied, modified, or distributed except according to those terms.
when (NimMajor, NimMinor) < (1, 4):
{.push raises: [Defect].}
else:
{.push raises: [].}
import
stew/endians2, stint,
./extras,
spec/[eth2_merkleization, keystore, signatures],
spec/datatypes/base
func get_eth1data_stub*(deposit_count: uint64, current_epoch: Epoch): Eth1Data =
# https://github.com/ethereum/eth2.0-pm/blob/e596c70a19e22c7def4fd3519e20ae4022349390/interop/mocked_eth1data/README.md
let
voting_period = current_epoch.uint64 div EPOCHS_PER_ETH1_VOTING_PERIOD
Eth1Data(
deposit_root: hash_tree_root(voting_period),
deposit_count: deposit_count,
block_hash: hash_tree_root(hash_tree_root(voting_period).data),
)
func makeInteropPrivKey*(i: int): ValidatorPrivKey =
var bytes: array[32, byte]
bytes[0..7] = uint64(i).toBytesLE()
# BLS381-12 curve order - same as milagro but formatted differently
const curveOrder =
u256"52435875175126190479447740508185965837690552500527637822603658699938581184513"
let
privkeyBytes = eth2digest(bytes)
key = (UInt256.fromBytesLE(privkeyBytes.data) mod curveOrder).toBytesBE()
ValidatorPrivKey.fromRaw(key).get
const eth1BlockHash* = block:
var x: Eth2Digest
for v in x.data.mitems: v = 0x42
x
func makeDeposit*(
preset: RuntimeConfig,
pubkey: ValidatorPubKey, privkey: ValidatorPrivKey, epoch = 0.Epoch,
amount: Gwei = MAX_EFFECTIVE_BALANCE.Gwei,
flags: UpdateFlags = {}): DepositData =
result = DepositData(
amount: amount,
pubkey: pubkey,
withdrawal_credentials: makeWithdrawalCredentials(pubkey))
if skipBlsValidation notin flags:
result.signature = preset.get_deposit_signature(result, privkey).toValidatorSig()