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Round out the runtime

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Ensures the block's size limit is respected.

Defines a policy for weights. While I'm unsure I want to commit to this
forever, I do want to acknowledge it's valid and well-defined.

Cleans up the `serai-runtime` crate a bit with further modules in the `wasm`
folder.
This commit is contained in:
Luke Parker
2025-12-02 21:04:47 -05:00
parent 98044f93b1
commit ff95c58341
10 changed files with 347 additions and 325 deletions
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38
substrate/core/src/lib.rs
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@@ -8,6 +8,9 @@ extern crate alloc;
use frame_support::traits::{PreInherents, PostTransactions};
mod limits;
pub use limits::Limits;
mod iumt;
pub use iumt::*;
@@ -83,7 +86,8 @@ pub mod pallet {
#[pallet::config]
pub trait Config:
frame_system::Config<Hash: Into<[u8; 32]>> + pallet_timestamp::Config<Moment = u64>
frame_system::Config<Hash: Into<[u8; 32]>, BlockLength = Limits, BlockWeights = Limits>
+ pallet_timestamp::Config<Moment = u64>
{
}
@@ -120,7 +124,7 @@ pub mod pallet {
BlockTransactionsCommitmentMerkle::<T>::new_expecting_none();
BlockEventsCommitmentMerkle::<T>::new_expecting_none();
Self::start_transaction();
Self::start_transaction(0);
<_>::build(config);
Self::end_transaction([0; 32]);
@@ -130,7 +134,15 @@ pub mod pallet {
/// The code to run when beginning execution of a transaction.
///
/// The caller MUST ensure two transactions aren't simultaneously started.
pub fn start_transaction() {
pub fn start_transaction(len: usize) {
{
let existing_len = frame_system::AllExtrinsicsLen::<T>::get().unwrap_or(0);
let new_len = existing_len.saturating_add(u32::try_from(len).unwrap_or(u32::MAX));
// We panic here as this should've been caught earlier during validation
assert!(new_len <= u32::try_from(serai_abi::Block::SIZE_LIMIT).unwrap());
frame_system::AllExtrinsicsLen::<T>::set(Some(new_len));
}
TransactionEventsMerkle::<T>::new_expecting_none();
Self::deposit_event(Event::BeginTransaction);
}
@@ -192,7 +204,21 @@ impl<T: Config> PreInherents for StartOfBlock<T> {
BlockTransactionsCommitmentMerkle::<T>::new_expecting_none();
BlockEventsCommitmentMerkle::<T>::new_expecting_none();
Pallet::<T>::start_transaction();
/*
We assign the implicit transaction with the block the length of the block itself: its
header's length and the length of the length-prefix for the list of transactions.
The length-prefix will be a little-endian `u32`, as `Block` will be borsh-serialized
(https://borsh.io).
The length of each actual transaction is expected to be accurate as the SCALE implementation
defers to the `borsh` serialization.
*/
assert!(
frame_system::AllExtrinsicsLen::<T>::get().is_none(),
"AllExtrinsicsLen wasn't killed at the end of the last block"
);
Pallet::<T>::start_transaction(serai_abi::Header::SIZE + 4);
// Handle the `SeraiPreExecutionDigest`
/*
@@ -220,7 +246,7 @@ impl<T: Config> PreInherents for StartOfBlock<T> {
pub struct EndOfBlock<T: Config>(PhantomData<T>);
impl<T: Config> PostTransactions for EndOfBlock<T> {
fn post_transactions() {
Pallet::<T>::start_transaction();
Pallet::<T>::start_transaction(0);
// Other modules' `PostTransactions`
@@ -229,6 +255,8 @@ impl<T: Config> PostTransactions for EndOfBlock<T> {
end_of_block_transaction_hash[.. 16].copy_from_slice(&[0xff; 16]);
Pallet::<T>::end_transaction(end_of_block_transaction_hash);
frame_system::AllExtrinsicsLen::<T>::kill();
use serai_abi::SeraiExecutionDigest;
frame_system::Pallet::<T>::deposit_log(
frame_support::sp_runtime::generic::DigestItem::Consensus(