content: from eth_typing import (
      ChecksumAddress,
      HexAddress,
      HexStr,
  )
  from hexbytes import (
      HexBytes,
  )
  
  ACCEPTABLE_STALE_HOURS = 48
  
  AUCTION_START_GAS_CONSTANT = 25000
  AUCTION_START_GAS_MARGINAL = 39000
  
  EMPTY_SHA3_BYTES = HexBytes(b"\0" * 32)
  EMPTY_ADDR_HEX = HexAddress(HexStr("0x" + "00" * 20))
  
  REVERSE_REGISTRAR_DOMAIN = "addr.reverse"
  
  ENS_MAINNET_ADDR = ChecksumAddress(
      HexAddress(HexStr("0x00000000000C2E074eC69A0dFb2997BA6C7d2e1e"))
  )
  
  
  # --- interface ids --- #
  
  ENS_ADDR_INTERFACE_ID = HexStr("0x3b3b57de")
  ENS_NAME_INTERFACE_ID = HexStr("0x691f3431")
  ENS_ABI_INTERFACE_ID = HexStr("0x2203ab56")
  ENS_PUBLIC_KEY_INTERFACE_ID = HexStr("0xc8690233")
  ENS_TEXT_INTERFACE_ID = HexStr("0x59d1d43c")
  ENS_CONTENT_HASH_INTERFACE_ID = HexStr("0xbc1c58d1")
  ENS_MULTICHAIN_ADDRESS_INTERFACE_ID = HexStr("0xf1cb7e06")  # ENSIP-9
  ENS_EXTENDED_RESOLVER_INTERFACE_ID = HexStr("0x9061b923")  # ENSIP-10
  