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use std::io::{Error, ErrorKind, Result};
use log::debug;
use crate::message::{self, compress, Compressor};
impl Compressor for message::ancestors::Message {
fn compress_with_header(&self) -> Result<bytes::Bytes> {
let type_id = message::TYPES
.get("ancestors")
.ok_or_else(|| Error::new(ErrorKind::InvalidInput, "unknown type name"))?;
let packer = message::default_packer();
packer.pack_bytes(self.chain_id.as_ref())?;
packer.pack_u32(self.request_id)?;
packer.pack_u32(self.containers.len() as u32)?;
for container in self.containers.iter() {
packer.pack_bytes_with_header(container.as_ref())?;
}
let bytes_uncompressed = packer.bytes_len();
let compressed = compress::pack_gzip(&packer.take_bytes())?;
let bytes_compressed = compressed.len();
let packer = message::default_packer_with_header();
packer.pack_byte(*type_id)?;
packer.pack_bool(true)?;
packer.pack_bytes(compressed.as_ref())?;
if bytes_uncompressed > bytes_compressed {
debug!(
"ancestors compression saved {} bytes",
bytes_uncompressed - bytes_compressed
);
} else {
debug!(
"ancestors compression added {} byte(s)",
bytes_compressed - bytes_uncompressed
);
}
Ok(packer.take_bytes())
}
}
#[test]
fn test_message() {
use avalanche_utils::cmp;
let msg = message::ancestors::Message::create(
crate::ids::Id::empty(),
7,
vec![vec![0x01, 0x02], vec![0x03, 0x04]],
);
let data_with_header = msg.compress_with_header().unwrap();
let expected_data: &[u8] = &[
0x00, 0x00, 0x00, 0x2d,
0x0b,
0x01,
0x1f, 0x8b, 0x8, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xff, 0x85, 0xc4, 0x89, 0x9, 0x0, 0x0, 0xc,
0xc2, 0x40, 0xfb, 0x40, 0xf7, 0xdf, 0xb8, 0xea, 0x2, 0x6, 0x2e, 0x40, 0xec, 0xa8, 0xa5,
0xfc, 0xd9, 0x7, 0x35, 0xbc, 0xe2, 0xd6, 0x34, 0x0, 0x0, 0x0,
];
assert!(cmp::eq_vectors(expected_data, &data_with_header));
}