Problem

When using BoundedVec, it's not possible to pass the data to this encoder or decoder, because the storage vector is padded and we don't have a way to specify the that only the first len bytes should be encoded/decoded. We need function variants that either accept types of BoundedVec instead of fixed-length arrays or that accept both an array and a specification of the length of the meaningful data inside that array.

Happy Case

Example:

fn do_something(encoded_id: [u8; ENCODED_LEN], raw_id: BoundedVec<u8, ID_MAX_LEN>) {
    let encoded_raw_id: [u8; ENCODED_LEN] = noir_base64::BASE64_URL_ENCODER.encode_var(raw_id.storage(), raw_id.len());
    assert(encoded_id === encoded_raw_id);
}

Workaround

Not that I can think of. We would need to be able to create a fixed-length array of the correct length from a BoundedVec, which isn't possible because we can't declare a fixed-length array to have a length that's not known at compile time

Workaround Description

No response

Additional Context

No response

Project Impact

Nice-to-have

Blocker Context

No response

Would you like to submit a PR for this Issue?

Yes

Support Needs

No response