Suggestion: add Base58EncodedAddress constants to avoid unnecessary boilerplate

[mikemaccana]

Right now people have to run something like:

const SYSTEM_PROGRAM =
  "11111111111111111111111111111111" as Base58EncodedAddress;

const MEMO_PROGRAM =
  "MemoSq4gqABAXKb96qnH8TysNcWxMyWCqXgDLGmfcHr" as Base58EncodedAddress;

As a user that wants to send you 4 sol with a note saying 'Thanks!', I'd expect to be able to import SYSTEM_PROGRAM, MEMO_PROGRAM, COMPUTE_BUDGET_PROGRAM and similar from web3.js with the typing done for me.

Motivation

Easier to do this once in web3.js rather than have every example contain the same boilerplate

Example use case

import { SYSTEM_PROGRAM, MEMO_PROGRAM } from "@solana/web3.js";

[steveluscher]

@buffalojoec made this a lot better in #1619.

[steveluscher]

And also, @lorisleiva's codegen is going to produce generated constants that you can import with reckless abandon, for every program imaginable.

[github-actions]

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