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Igor Matuszewski
028f3d2674
* Backport paritytech/substrate#7381 * Bring back genesis storage build in aura/timestamp To not change spec version, see https://github.com/paritytech/substrate/pull/7686#discussion_r540032743 * Backport paritytech/substrate#7238 * Backport paritytech/substrate#7395 * Bump impl_version * Fix UI tests and bump trybuild dep See https://github.com/rust-lang/rust/pull/73996 Backports: https://github.com/paritytech/substrate/pull/7764 https://github.com/paritytech/substrate/pull/7656 * Partially backport paritytech/substrate#7838 * Release frame-support with a dep compilation fix * Bump patch level for remaining crates This is done because at the time of writing cargo-unleash does not fully support partial workspace publishing and mixes both local and crates.io versions of the packages, leading to errors in the release check workflow. * Backport paritytech/substrate#7854 ...to fix compilation error when using futures-* v0.3.9. * Adding Changelog entry for patch release Co-authored-by: Bastian Köcher <git@kchr.de> Co-authored-by: Benjamin Kampmann <ben@parity.io>
I'm online Module
If the local node is a validator (i.e. contains an authority key), this module gossips a heartbeat transaction with each new session. The heartbeat functions as a simple mechanism to signal that the node is online in the current era.
Received heartbeats are tracked for one era and reset with each new era. The module exposes two public functions to query if a heartbeat has been received in the current era or session.
The heartbeat is a signed transaction, which was signed using the session key
and includes the recent best block number of the local validators chain as well
as the NetworkState.
It is submitted as an Unsigned Transaction via off-chain workers.
Interface
Public Functions
is_online- True if the validator sent a heartbeat in the current session.
Usage
use frame_support::{decl_module, dispatch};
use frame_system::ensure_signed;
use pallet_im_online::{self as im_online};
pub trait Config: im_online::Config {}
decl_module! {
pub struct Module<T: Config> for enum Call where origin: T::Origin {
#[weight = 0]
pub fn is_online(origin, authority_index: u32) -> dispatch::DispatchResult {
let _sender = ensure_signed(origin)?;
let _is_online = <im_online::Module<T>>::is_online(authority_index);
Ok(())
}
}
}
Dependencies
This module depends on the Session module.
License: Apache-2.0