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Weight+size limits for bridge GRANDPA pallet calls (#1882)

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* weight+size limits for bridge GRANDPA pallet calls

* continue

* fixed all tests

* some changes to refund computations

* post_dispatch_refunds_relayer_in_all_finality_batch_with_extra_weight

* - dup code

* do not return Pays::No if call is above weight/size limits

* relayer_pays_tx_fee_when_submitting_huge_mandatory_header and relayer_pays_tx_fee_when_submitting_justification_with_long_ancestry_votes

* clippy

* fmt

* clippy

* small change in docs

* fixed GRANDPA-limits constants for Polkadot-like chains

* clippy

* clippy + spelling

* Update primitives/polkadot-core/src/lib.rs

Co-authored-by: Adrian Catangiu <adrian@parity.io>

* Update bin/runtime-common/src/refund_relayer_extension.rs

Co-authored-by: Adrian Catangiu <adrian@parity.io>

* reverted unnecessary change

* GrandpaJustification::max_reasonable_size

---------

Co-authored-by: Adrian Catangiu <adrian@parity.io>
This commit is contained in:
Svyatoslav Nikolsky
2023-02-22 09:51:11 +03:00
committed by Bastian Köcher
parent 1aa6da448f
commit 498a3e83d0
10 changed files with 643 additions and 195 deletions
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bridges/primitives/polkadot-core/src/lib.rs
+18 -11
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@@ -50,30 +50,37 @@ pub mod parachains;
/// our bridge hub parachains huge. So let's stick to the real-world value here.
///
/// Right now both Kusama and Polkadot aim to have around 1000 validators. Let's be safe here and
/// take twice as much here.
pub const MAX_AUTHORITIES_COUNT: u32 = 2_048;
/// take a bit more here.
pub const MAX_AUTHORITIES_COUNT: u32 = 1_256;
/// Reasonable number of headers in the `votes_ancestries` on Polkadot-like chains.
///
/// See [`bp_header_chain::ChainWithGrandpa`] for more details.
pub const REASONABLE_HEADERS_IN_JUSTIFICATON_ANCESTRY: u32 = 8;
///
/// This value comes from recent (February, 2023) Kusama and Polkadot headers. There are no
/// justifications with any additional headers in votes ancestry, so reasonable headers may
/// be set to zero. But we assume that there may be small GRANDPA lags, so we're leaving some
/// reserve here.
pub const REASONABLE_HEADERS_IN_JUSTIFICATON_ANCESTRY: u32 = 2;
/// Approximate average header size in `votes_ancestries` field of justification on Polkadot-like
/// chains.
///
/// See [`bp_header_chain::ChainWithGrandpa`] for more details.
pub const AVERAGE_HEADER_SIZE_IN_JUSTIFICATION: u32 = 256;
///
/// This value comes from recent (February, 2023) Kusama headers. Average is `336` there, but some
/// non-mandatory headers has size `40kb` (they contain the BABE epoch descriptor with all
/// authorities - just like our mandatory header). Since we assume `2` headers in justification
/// votes ancestry, let's set average header to `40kb / 2`.
pub const AVERAGE_HEADER_SIZE_IN_JUSTIFICATION: u32 = 20 * 1024;
/// Approximate maximal header size on Polkadot-like chains.
///
/// We expect maximal header to have digest item with the new authorities set for every consensus
/// engine (GRANDPA, Babe, BEEFY, ...) - so we multiply it by 3. And also
/// `AVERAGE_HEADER_SIZE_IN_JUSTIFICATION` bytes for other stuff.
///
/// See [`bp_header_chain::ChainWithGrandpa`] for more details.
pub const MAX_HEADER_SIZE: u32 = MAX_AUTHORITIES_COUNT
.saturating_mul(3)
.saturating_add(AVERAGE_HEADER_SIZE_IN_JUSTIFICATION);
///
/// This value comes from recent (February, 2023) Kusama headers. Maximal header is a mandatory
/// header. In its SCALE-encoded form it is `80348` bytes. Let's have some reserve here.
pub const MAX_HEADER_SIZE: u32 = 90_000;
/// Number of extra bytes (excluding size of storage value itself) of storage proof, built at
/// Polkadot-like chain. This mostly depends on number of entries in the storage trie.