How to define an `Address` as a constant?

[PaulRBerg]

Hello! I want to define a global constant of type Address, but I just don't know how to do it, and I couldn't figure out a solution from the docs. I tried to do the following:

use ethereum_types::Address;
use std::str::FromStr;

pub const MY_ADDRESS: Address = Address::from_slice(0x0298F4332e3857631385b39766325058a93e249f);

But the compilation failed with this error:

error: integer literal is too large

I also tried to use the from_str function:

use ethereum_types::Address;
use std::str::FromStr;

pub const MY_ADDRESS: Address = Address::from_str("0x0298F4332e3857631385b39766325058a93e249f").unwrap();

But this didn't work either:

error: cannot call non-const fn <H160 as FromStr>::from_str in constants note: calls in constants are limited to constant functions, tuple structs and tuple variants cannot call non-const fn <H160 as FromStr>::from_str in constants calls in constants are limited to constant functions, tuple structs and tuple variants

Is it even possible to do this, or must Addresses always be defined as non-constants?

I saw in your tests that you are hard-coding some addresses like this:

H160::from([
    0xEF, 0x2D, 0x6D, 0x19, 0x40, 0x84, 0xC2, 0xDE, 0x36, 0xE0,
    0xDA, 0xBF, 0xCE, 0x45, 0xD0, 0x46, 0xB3, 0x7D, 0x11, 0x06,
]);

But I wonder if there is a less verbose way to do it, which doesn't involve passing an array of bytes to the from function? Ideally I would pass the address in full, as shown in the code snippets above.

Side note: it might be worth it to enable discussions in this repo, so that users like me who don't want to report bugs or make feature requests can avoid spamming the issues channel with questions.