Address0xHex formats with an 0x prefix, but no checksum (lower case).

AddressPlainHex can parse the same, but formats as just flat hex (no prefix).

AddressWithChecksum uses full 0x prefixed checksum address format.

HexBytes0xPrefix are serialized to JSON as hex with an `0x` prefix.

HexBytesPlain is simple bytes that are JSON stored/retrieved as hex.

HexInteger is a positive integer - serializes to JSON as an 0x hex string (no leading zeros), and parses flexibly depending on the prefix (so 0x for hex, or base 10 for plain string / float64).

HexUint64 is a positive integer - serializes to JSON as an 0x hex string (no leading zeros), and parses flexibly depending on the prefix (so 0x for hex, or base 10 for plain string / float64).