Bastian Köcher 450b96c50d Sync: Propagate block announcement data (#7903) ...

* Sync: Propagate block announcement data

This pr adds a feature to the sync protocol to propagate the data that
we received alongside a block announcement. This is done by adding a
cache that caches the last X block announcement data where X is set to
the number of `in_peers` (giving every peer the chance to send us a
different block). This will be required by parachains to ensure that
even peers who are not connected to a collator receive the data
alongside the block announcement to properly validate it and request the
block.

* Review comment

* Bring back the code and add new variant to ensure we don't insert block
announce data when something wasn't checked

* Also use out_peers

2021-01-19 17:01:11 +01:00

substrate

Sync: Propagate block announcement data (#7903)

2021-01-19 17:01:11 +01:00

S

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