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Unify maximum supported PoV size a bit. (#2691)

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* Unify maximum supported PoV size a bit.

* Use MAX_POV_SIZE also in `HostConfiguration`.

* Fix types.
This commit is contained in:
Robert Klotzner
2021-03-24 15:48:36 +01:00
committed by GitHub
parent a000a3351b
commit fa11c6d785
3 changed files with 16 additions and 8 deletions
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polkadot/primitives/src/v1.rs
+12 -2
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@@ -458,6 +458,17 @@ impl PoV {
#[derive(Clone, Encode, Decode, PartialEq, Eq)]
pub struct CompressedPoV(Vec<u8>);
/// Maximum PoV size we support right now.
pub const MAX_POV_SIZE: u32 = 50 * 1024 * 1024;
/// Very conservative (compression ratio of 1).
///
/// Experiments showed that we have a typical compression ratio of 3.4.
/// https://github.com/ordian/bench-compression-algorithms/
///
/// So this could be reduced if deemed necessary.
pub const MAX_COMPRESSED_POV_SIZE: u32 = MAX_POV_SIZE;
#[derive(Debug, Clone, Copy, PartialEq, Eq, thiserror::Error)]
#[cfg(feature = "std")]
#[allow(missing_docs)]
@@ -490,13 +501,12 @@ impl CompressedPoV {
#[cfg(not(target_os = "unknown"))]
pub fn decompress(&self) -> Result<PoV, CompressedPoVError> {
use std::io::Read;
const MAX_POV_BLOCK_SIZE: usize = 32 * 1024 * 1024;
struct InputDecoder<'a, T: std::io::BufRead>(&'a mut zstd::Decoder<T>, usize);
impl<'a, T: std::io::BufRead> parity_scale_codec::Input for InputDecoder<'a, T> {
fn read(&mut self, into: &mut [u8]) -> Result<(), parity_scale_codec::Error> {
self.1 = self.1.saturating_add(into.len());
if self.1 > MAX_POV_BLOCK_SIZE {
if self.1 > MAX_POV_SIZE as usize {
return Err("pov block too big".into())
}
self.0.read_exact(into).map_err(Into::into)