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Max Inden
3f3910ccaf
`GossipEngine` spawns two tasks, one for a periodic tick, one to forward messages from the network to subscribers. These tasks hold an `Arc` to a `GossipEngineInner`. To reduce the amount of shared ownership (locking) this patch integrates the two tasks into a `Future` implementation on the `GossipEngine` struct. This `Future` implementation can now be called from a single owner, e.g. the `finality-grandpa` `NetworkBridge`. As a side effect this removes the requirement on the `network-gossip` crate to spawn tasks and thereby removes the requirement on the `finality-grandpa` crate to spawn any tasks. This is part of a greater effort to reduce the number of owners of components within `finality-grandpa`, `network` and `network-gossip` as well as to reduce the amount of unbounded channels. For details seed9837d7dd,5f80929dcand597c0a6c4.
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