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Dmitry Markin authored
Move request-response handling from `ChainSync` to `SyncingEngine` as part of [Sync 2.0](https://github.com/paritytech/polkadot-sdk/issues/534) refactoring aimed at making `ChainSync` a pure state machine. Resolves https://github.com/paritytech/polkadot-sdk/issues/502. --------- Co-authored-by:
Aaro Altonen <[email protected]> Co-authored-by:
Bastian Köcher <[email protected]>
