nimbus-eth2/beacon_chain/interop.nim

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# beacon_chain
# Copyright (c) 2018-2021 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.
{.push raises: [Defect].}
import
stew/endians2, stint,
./extras, ./ssz/merkleization,
spec/[crypto, digest, 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
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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 =
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var bytes: array[32, byte]
bytes[0..7] = uint64(i).toBytesLE()
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let
# BLS381-12 curve order - same as milagro but formatted different
curveOrder =
"52435875175126190479447740508185965837690552500527637822603658699938581184513".parse(UInt256)
privkeyBytes = eth2digest(bytes)
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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: RuntimePreset,
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))
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if skipBLSValidation notin flags:
result.signature = preset.get_deposit_signature(result, privkey).toValidatorSig()