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Generic authorship and uncle inclusion module (#2941)

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* generalized uncle processing

* add some uncle tests

* set author and do event handling

* OnePerAuthorPerHeight no longer O(n^2) and test

* bump impl_version of node

* Documentation and style fixes

Co-Authored-By: DemiMarie-parity <48690212+DemiMarie-parity@users.noreply.github.com>

* fix #2949: index-based FindAuthor wrapper for srml-session

* use for_each_tuple
This commit is contained in:
Robert Habermeier
2019-06-26 12:24:58 +02:00
committed by GitHub
parent 050377d1c0
commit 0ddf4a2a00
9 changed files with 705 additions and 3 deletions
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substrate/srml/session/src/lib.rs
+24 -3
View File
@@ -34,7 +34,7 @@
//! - **Session key:** A session key is actually several keys kept together that provide the various signing
//! functions required by network authorities/validators in pursuit of their duties.
//! - **Session key configuration process:** A session key is set using `set_key` for use in the
//! next session. It is stored in `NextKeyFor`, a mapping between the caller's `AccountID` and the session
//! next session. It is stored in `NextKeyFor`, a mapping between the caller's `AccountId` and the session
//! key provided. `set_key` allows users to set their session key prior to becoming a validator.
//! It is a public call since it uses `ensure_signed`, which checks that the origin is a signed account.
//! As such, the account ID of the origin stored in in `NextKeyFor` may not necessarily be associated with
@@ -120,8 +120,11 @@ use rstd::{prelude::*, marker::PhantomData, ops::Rem};
use rstd::alloc::borrow::ToOwned;
use parity_codec::Decode;
use primitives::traits::{Zero, Saturating, Member, OpaqueKeys};
use srml_support::{StorageValue, StorageMap, for_each_tuple, decl_module, decl_event, decl_storage};
use srml_support::{ensure, traits::{OnFreeBalanceZero, Get}, Parameter, print};
use srml_support::{
ConsensusEngineId, StorageValue, StorageMap, for_each_tuple, decl_module,
decl_event, decl_storage,
};
use srml_support::{ensure, traits::{OnFreeBalanceZero, Get, FindAuthor}, Parameter, print};
use system::ensure_signed;
/// Simple index type with which we can count sessions.
@@ -377,6 +380,24 @@ impl<T: Trait> OnFreeBalanceZero<T::AccountId> for Module<T> {
}
}
/// Wraps the author-scraping logic for consensus engines that can recover
/// the canonical index of an author. This then transforms it into the
/// registering account-ID of that session key index.
pub struct FindAccountFromAuthorIndex<T, Inner>(rstd::marker::PhantomData<(T, Inner)>);
impl<T: Trait, Inner: FindAuthor<u32>> FindAuthor<T::AccountId>
for FindAccountFromAuthorIndex<T, Inner>
{
fn find_author<'a, I>(digests: I) -> Option<T::AccountId>
where I: 'a + IntoIterator<Item=(ConsensusEngineId, &'a [u8])>
{
let i = Inner::find_author(digests)?;
let validators = <Module<T>>::validators();
validators.get(i as usize).map(|k| k.clone())
}
}
#[cfg(test)]
mod tests {
use super::*;