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contracts: Prevent PoV attack vector with minimal viable solution (#11372)

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* Add ContractAccessWeight

* Apply suggestions from code review

Co-authored-by: Michael Müller <michi@parity.io>

Co-authored-by: Michael Müller <michi@parity.io>
This commit is contained in:
Alexander Theißen
2022-05-09 11:25:14 +02:00
committed by GitHub
parent e30c18d61d
commit 4b64c9085a
4 changed files with 63 additions and 10 deletions
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substrate/frame/contracts/src/wasm/code_cache.rs
+7 -3
View File
@@ -38,7 +38,7 @@ use crate::{
use frame_support::{
dispatch::{DispatchError, DispatchResult},
ensure,
traits::ReservableCurrency,
traits::{Get, ReservableCurrency},
};
use sp_core::crypto::UncheckedFrom;
use sp_runtime::traits::BadOrigin;
@@ -216,8 +216,12 @@ impl<T: Config> Token<T> for CodeToken {
// size of the contract.
match *self {
Reinstrument(len) => T::WeightInfo::reinstrument(len),
Load(len) => T::WeightInfo::call_with_code_per_byte(len)
.saturating_sub(T::WeightInfo::call_with_code_per_byte(0)),
Load(len) => {
let computation = T::WeightInfo::call_with_code_per_byte(len)
.saturating_sub(T::WeightInfo::call_with_code_per_byte(0));
let bandwith = T::ContractAccessWeight::get().saturating_mul(len.into());
computation.max(bandwith)
},
}
}
}