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Bastian Köcher
090b55b791
* Offchain worker: Enable http2 and improve logging Apparently some webpages now return http2 by default and that silently breaks the offchain http extension. The solution to this is to enable the `http2` feature of hyper. Besides that, this pr improves the logging to make it easier to debug such errors. * FMT * Adds http2 test
Substrate offchain workers.
The offchain workers is a special function of the runtime that gets executed after block is imported. During execution it's able to asynchronously submit extrinsics that will either be propagated to other nodes or added to the next block produced by the node as unsigned transactions.
Offchain workers can be used for computation-heavy tasks that are not feasible for execution during regular block processing. It can either be tasks that no consensus is required for, or some form of consensus over the data can be built on-chain for instance via:
- Challenge period for incorrect computations
- Majority voting for results
- etc
License: GPL-3.0-or-later WITH Classpath-exception-2.0