import os


ZERO_BYTES32 = b'\x00' * 32

# Eth2-spec constants taken from https://github.com/ethereum/eth2.0-specs/blob/dev/specs/phase0/beacon-chain.md
DOMAIN_DEPOSIT = bytes.fromhex('03000000')
BLS_WITHDRAWAL_PREFIX = bytes.fromhex('00')
ETH1_ADDRESS_WITHDRAWAL_PREFIX = bytes.fromhex('01')

ETH2GWEI = 10 ** 9
MIN_DEPOSIT_AMOUNT = 2 ** 0 * ETH2GWEI
MAX_DEPOSIT_AMOUNT = 2 ** 5 * ETH2GWEI


# File/folder constants
WORD_LISTS_PATH = os.path.join('eth2deposit', 'key_handling', 'key_derivation', 'word_lists')
DEFAULT_VALIDATOR_KEYS_FOLDER_NAME = 'validator_keys'

# Internationalisation constants
INTL_CONTENT_PATH = os.path.join('eth2deposit', 'intl')
INTL_LANG_OPTIONS = {
    'cs': ('Český Jazyk', 'cs', 'Cesky Jazyk', 'Czech'),
    'en': ('English', 'en'),
    'es': ('Español', 'Espanol', 'es', 'Spanish'),
    'it': ('Italiano', 'it', 'Italian'),
    'ko': ('조선말', '한국어', 'ko', 'Korean'),
    'zh': ('汉语', 'zh', 'Chinease'),
}

# Sundry constants
UNICODE_CONTROL_CHARS = list(range(0x00, 0x20)) + list(range(0x7F, 0xA0))