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Make Memo a wrapper for Box<[u8; 512]>

This commit is contained in:
Deirdre Connolly 2020-02-12 21:30:29 -05:00 committed by Deirdre Connolly
parent ea8fa5ef46
commit 99e3b16476
1 changed files with 7 additions and 7 deletions
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14
zebra-chain/src/note_encryption/memo.rs
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@ -9,8 +9,8 @@ use std::{cmp, convert::TryFrom, fmt};
/// recipient of the note.
///
/// [ps]: https://zips.z.cash/protocol/protocol.pdf#notept
#[derive(Clone, Copy)]
pub struct Memo([u8; 512]);
#[derive(Clone)]
pub struct Memo(Box<[u8; 512]>);
impl<'a> TryFrom<&'a [u8]> for Memo {
type Error = &'static str;
@ -21,11 +21,11 @@ impl<'a> TryFrom<&'a [u8]> for Memo {
match input.len().cmp(&512) {
cmp::Ordering::Less => {
full_bytes[0..input.len()].copy_from_slice(input);
Ok(Memo(full_bytes))
Ok(Memo(Box::new(full_bytes)))
}
cmp::Ordering::Equal => {
full_bytes[..].copy_from_slice(input);
Ok(Memo(full_bytes))
Ok(Memo(Box::new(full_bytes)))
}
cmp::Ordering::Greater => Err("Memos have a max length of 512 bytes."),
}
@ -50,7 +50,7 @@ impl fmt::Debug for Memo {
#[test]
fn memo_fmt() {
let memo = Memo(
let memo = Memo(Box::new(
*b"thiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiis \
iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiis \
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa \
@ -58,7 +58,7 @@ fn memo_fmt() {
looooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooong \
meeeeeeeeeeeeeeeeeeemooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo \
but it's just short enough",
);
));
assert_eq!(format!("{:?}", memo),
"Memo(\"thiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiis iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiis aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa veeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeryyyyyyyyyyyyyyyyyyyyyyyyyy looooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooong meeeeeeeeeeeeeeeeeeemooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo but it\\\'s just short enough\")"
@ -67,7 +67,7 @@ fn memo_fmt() {
let mut some_bytes = [0u8; 512];
some_bytes[0] = 0xF6;
assert_eq!(format!("{:?}", Memo(some_bytes)),
assert_eq!(format!("{:?}", Memo(Box::new(some_bytes))),
"Memo(\"f600000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000\")"
);
}