robert

Cumulus Runtimes should check inherents and consensus seals in execute_block as well as validate_block

1

Currently, Cumulus runtimes are designed to check inherents and consensus seals in the `validate_block` entry point used by relay-chain validators to execute the block. But the `execute_block` entry point used...

Parent search for Aura should draw upon real asynchronous backing parameters

2

We should read the storage of the relay chain at the relay parent, but if it's not present fall back to a default hardcoded value of 0. Adding a utility...

Bidder logic framework for Cumulus

11

We should provide a pluggable framework in Cumulus for collators to determine when to bid on parathread blockspace. Parathread node authors should be able to use this framework to choose...

Fix all ignored system parachain integration tests

1

Related discussions: #3026 #3023 - in #2300 I'm simply ignoring the tests to enable a merge, but a fix to the tests should be forthcoming afterwards. https://github.com/paritytech/cumulus/pull/2300/commits/17db1fbd29dbfd4f071a3326f6798df402f01e27

Motivation: 1. Enable nodes to submit collations for blocks they haven't themselves authored (probably needed for implementing PBFT/HotStuff style consensus) 2. Disconnect the concept of "collation" from being a single...

The lookahead collator currently operates like this: 1. It accepts an `authoring_duration` 2. Every relay-chain block, it authors blocks in a loop with `authoring_duration` as a limit. The lookahead collator...

Introduced in https://github.com/paritytech/cumulus/pull/2573 This should test that: * Blocks are not returned when the relay-parent is too old * The `ignore_alternative_branches` parameter is respected, both with and without blocks pending...

Cumulus consensus engines should have pluggable strategies for selecting proposal time

1

This is currently hardcoded to 500ms. For asynchronous backing, we should implement a plugin system that accepts the unincluded segment length and the relay-parent to set the proposal duration to...

Block Wrapping to avoid dependence on relay parent and enable fast parachain "finality"

2

Polkadot currently limits the maximum age of a relay parent, which presents an issue if we try to build any kind of "finality" into parachains: a parachain block can be...

We already have `Add`, `Sub`, `Div`, etc. The assigning versions of these ops would be super useful as well.