Constants
The web3.constants module contains commonly used values.
Strings
#The Address Zero, which is 20 bytes (40 nibbles) of zero.
web3.constants.ADDRESS_ZERO
#The hexadecimal version of Max uint256.
web3.constants.MAX_INT
#The Hash Zero, which is 32 bytes (64 nibbles) of zero.
web3.constants.HASH_ZERO
Int
#The amount of Wei in one Ether
web3.constants.WEI_PER_ETHER