mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
synced 2026-04-28 06:17:56 +00:00
Bastian Köcher
33b61f0e03
* Aura: Adds some compatibility mode to support old chains In https://github.com/paritytech/substrate/pull/9132 we changed the way how we get the authorities from the runtime. Before this mentioned pr we would call `initialize_block` before calling the authorities runtime function. The problem with this was that when you have a block X that would switch the authority set, it would already be signed by an authority of the new set. This was wrong, as a block should only be signed by the current authority set. As this change is a hard fork, this pr brings back the possibility for users that have a chain running with this old logic to upgrade. They will need to use: ``` CompatibilityMode::UseInitializeBlock { until: some_block_in_the_future } ``` Using this compatibility mode will make the node behave like the old nodes, aka calling `initialize_block` before doing the actual runtime call to `authorities`. Then when the given `until` block is being build/imported the node switches to the new behaviour of not calling `initialize_block` before. This is a hard fork, so the `until` block should be chosen wisely as a point where all nodes in the network have upgraded. * Fixes * Make docs ready * Update client/consensus/aura/src/lib.rs Co-authored-by: André Silva <123550+andresilva@users.noreply.github.com> * Update client/consensus/aura/src/lib.rs Co-authored-by: André Silva <123550+andresilva@users.noreply.github.com> * Update client/consensus/aura/src/lib.rs Co-authored-by: André Silva <123550+andresilva@users.noreply.github.com> * FMT Co-authored-by: André Silva <123550+andresilva@users.noreply.github.com>
Aura (Authority-round) consensus in substrate.
Aura works by having a list of authorities A who are expected to roughly agree on the current time. Time is divided up into discrete slots of t seconds each. For each slot s, the author of that slot is A[s % |A|].
The author is allowed to issue one block but not more during that slot, and it will be built upon the longest valid chain that has been seen.
Blocks from future steps will be either deferred or rejected depending on how far in the future they are.
NOTE: Aura itself is designed to be generic over the crypto used.
License: GPL-3.0-or-later WITH Classpath-exception-2.0