resolves merge conflicts in settings.py

[slay6693]

beaconcha.in

import os
import click
import time
import json
from typing import Dict, List
from py_ecc.bls import G2ProofOfPossession as bls

from eth2deposit.exceptions import ValidationError
from eth2deposit.key_handling.key_derivation.path import mnemonic_and_path_to_key
from eth2deposit.key_handling.keystore import (
Keystore,
ScryptKeystore,
)
from eth2deposit.settings import DEPOSIT_CLI_VERSION, BaseChainSetting
from eth2deposit.utils.constants import (
BLS_WITHDRAWAL_PREFIX,
ETH2GWEI,
MAX_DEPOSIT_AMOUNT,
MIN_DEPOSIT_AMOUNT,
)
from eth2deposit.utils.crypto import SHA256
from eth2deposit.utils.ssz import (
compute_deposit_domain,
compute_signing_root,
DepositData,
DepositMessage,
)

class Credential:
"""
A Credential object contains all of the information for a single validator and the corresponding functionality.
Once created, it is the only object that should be required to perform any processing for a validator.
"""
def init(self, *, mnemonic: str, mnemonic_password: str,
index: int, amount: int, chain_setting: BaseChainSetting):
# Set path as EIP-2334 format
# https://eips.ethereum.org/EIPS/eip-2334
purpose = '12381'
coin_type = '3600'
account = str(index)
withdrawal_key_path = f'm/{purpose}/{coin_type}/{account}/0'
self.signing_key_path = f'{withdrawal_key_path}/0'

    self.withdrawal_sk = mnemonic_and_path_to_key(
        mnemonic=mnemonic, path=withdrawal_key_path, password=mnemonic_password)
    self.signing_sk = mnemonic_and_path_to_key(
        mnemonic=mnemonic, path=self.signing_key_path, password=mnemonic_password)
    self.amount = amount
    self.chain_setting = chain_setting

@property
def signing_pk(self) -> bytes:
    return bls.SkToPk(self.signing_sk)

@property
def withdrawal_pk(self) -> bytes:
    return bls.SkToPk(self.withdrawal_sk)

@property
def withdrawal_credentials(self) -> bytes:
    withdrawal_credentials = BLS_WITHDRAWAL_PREFIX
    withdrawal_credentials += SHA256(self.withdrawal_pk)[1:]
    return withdrawal_credentials

@property
def deposit_message(self) -> DepositMessage:
    if not MIN_DEPOSIT_AMOUNT <= self.amount <= MAX_DEPOSIT_AMOUNT:
        raise ValidationError(f"{self.amount / ETH2GWEI} ETH deposits are not within the bounds of this cli.")
    return DepositMessage(
        pubkey=self.signing_pk,
        withdrawal_credentials=self.withdrawal_credentials,
        amount=self.amount,
    )

@property
def signed_deposit(self) -> DepositData:
    domain = compute_deposit_domain(fork_version=self.chain_setting.GENESIS_FORK_VERSION)
    signing_root = compute_signing_root(self.deposit_message, domain)
    signed_deposit = DepositData(
        **self.deposit_message.as_dict(),
        signature=bls.Sign(self.signing_sk, signing_root)
    )
    return signed_deposit

@property
def deposit_datum_dict(self) -> Dict[str, bytes]:
    """
    Return a single deposit datum for 1 validator including all
    the information needed to verify and process the deposit.
    """
    signed_deposit_datum = self.signed_deposit
    datum_dict = signed_deposit_datum.as_dict()
    datum_dict.update({'deposit_message_root': self.deposit_message.hash_tree_root})
    datum_dict.update({'deposit_data_root': signed_deposit_datum.hash_tree_root})
    datum_dict.update({'fork_version': self.chain_setting.GENESIS_FORK_VERSION})
    datum_dict.update({'eth2_network_name': self.chain_setting.ETH2_NETWORK_NAME})
    datum_dict.update({'deposit_cli_version': DEPOSIT_CLI_VERSION})
    return datum_dict

def signing_keystore(self, password: str) -> Keystore:
    secret = self.signing_sk.to_bytes(32, 'big')
    return ScryptKeystore.encrypt(secret=secret, password=password, path=self.signing_key_path)

def save_signing_keystore(self, password: str, folder: str) -> str:
    keystore = self.signing_keystore(password)
    filefolder = os.path.join(folder, 'keystore-%s-%i.json' % (keystore.path.replace('/', '_'), time.time()))
    keystore.save(filefolder)
    return filefolder

def verify_keystore(self, keystore_filefolder: str, password: str) -> bool:
    saved_keystore = Keystore.from_json(keystore_filefolder)
    secret_bytes = saved_keystore.decrypt(password)
    return self.signing_sk == int.from_bytes(secret_bytes, 'big')

class CredentialList:
"""
A collection of multiple Credentials, one for each validator.
"""
def init(self, credentials: List[Credential]):
self.credentials = credentials

@classmethod
def from_mnemonic(cls,
                  *,
                  mnemonic: str,
                  mnemonic_password: str,
                  num_keys: int,
                  amounts: List[int],
                  chain_setting: BaseChainSetting,
                  start_index: int) -> 'CredentialList':
    if len(amounts) != num_keys:
        raise ValueError(
            f"The number of keys ({num_keys}) doesn't equal to the corresponding deposit amounts ({len(amounts)})."
        )
    key_indices = range(start_index, start_index + num_keys)
    with click.progressbar(key_indices, label='Creating your keys:\t\t',
                           show_percent=False, show_pos=True) as indices:
        return cls([Credential(mnemonic=mnemonic, mnemonic_password=mnemonic_password,
                               index=index, amount=amounts[index - start_index], chain_setting=chain_setting)
                    for index in indices])

def export_keystores(self, password: str, folder: str) -> List[str]:
    with click.progressbar(self.credentials, label='Creating your keystores:\t',
                           show_percent=False, show_pos=True) as credentials:
        return [credential.save_signing_keystore(password=password, folder=folder) for credential in credentials]

def export_deposit_data_json(self, folder: str) -> str:
    with click.progressbar(self.credentials, label='Creating your depositdata:\t',
                           show_percent=False, show_pos=True) as credentials:
        deposit_data = [cred.deposit_datum_dict for cred in credentials]
    filefolder = os.path.join(folder, 'deposit_data-%i.json' % time.time())
    with open(filefolder, 'w') as f:
        json.dump(deposit_data, f, default=lambda x: x.hex())
    return filefolder

def verify_keystores(self, keystore_filefolders: List[str], password: str) -> bool:
    with click.progressbar(zip(self.credentials, keystore_filefolders), label='Verifying your keystores:\t',
                           length=len(self.credentials), show_percent=False, show_pos=True) as items:
        return all(credential.verify_keystore(keystore_filefolder=filefolder, password=password)
                   for credential, filefolder in items

[slay6693]

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