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## Summary This PR turns on `-D warnings` for `cargo-check-each-crate job` job to fail on warnings e.g. like this: https://gitlab.parity.io/parity/mirrors/polkadot-sdk/-/jobs/4673130 Before this PR, there was a warning and `cargo-check-each-crate` job did not fail: https://gitlab.parity.io/parity/mirrors/polkadot-sdk/-/jobs/4641444 ``` warning: unused import: `ToTokens` --> substrate/primitives/api/proc-macro/src/utils.rs:22:34 | 22 | use quote::{format_ident, quote, ToTokens}; | ^^^^^^^^ | = note: `#[warn(unused_imports)]` on by default warning: `sp-api-proc-macro` (lib) generated 1 warning (run `cargo fix --lib -p sp-api-proc-macro` to apply 1 suggestion) ``` Fixes on the way: https://gitlab.parity.io/parity/mirrors/polkadot-sdk/-/jobs/4641444 https://gitlab.parity.io/parity/mirrors/polkadot-sdk/-/jobs/4673265 https://gitlab.parity.io/parity/mirrors/polkadot-sdk/-/jobs/4673410 https://gitlab.parity.io/parity/mirrors/polkadot-sdk/-/jobs/4673681 https://gitlab.parity.io/parity/mirrors/polkadot-sdk/-/jobs/4673836 https://gitlab.parity.io/parity/mirrors/polkadot-sdk/-/jobs/4673941 https://gitlab.parity.io/parity/mirrors/polkadot-sdk/-/jobs/4674256 https://gitlab.parity.io/parity/mirrors/polkadot-sdk/-/jobs/4679328 ## Questions - [ ] why does this check triggers only `cargo check --locked`? `--all-features` or `--all-targets` are not needed? Or aren't they avoided intentionally? --------- Co-authored-by: command-bot <>
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