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Dmitry Markin
5eb84f9cc6
* Replace deprecated libp2p feature specs with correct ones * Bump tokio to 1.21.2 * Replace async-std libp2p primitives with tokio ones * minor: rustfmt * Fix TestNet to run initialization in the tokio context * Convert telemetry test from async-std to tokio * Convert notifications tests from async-std to tokio * Convert chain sync tests from async-std to tokio * Ditch async-std completely * Make executor mandatory * Bump tokio to 1.22.0 * minor: rustfmt * Explicitly use tokio runtime in tests * Move more tests to explicit tokio runtime * Explicitly set multithreaded runtime in tokio test * minor: rustfmt * minor: fix comment * Replace async-std with tokio in MMR tests
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