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Anton
6cd2c8b395
* [frame/im-online] remove `external_addresses` from heartbeats Users should use DHT for discovering new nodes. The reason for adding external addresses was unstable work of authority discovery (see https://github.com/paritytech/substrate/issues/2719), which is now stable. Hence we can safely remove `external_addresses`. Refs https://github.com/paritytech/polkadot/issues/7181 * remove unused import * run benchmark * remove external_addresses from offchain NetworkState * add missing fn to TestNetwork * Revert "run benchmark" This reverts commit a282042c2d6bf8bae2c383f6e2699c3fe2970a3d. * update weights * address @bkchr comments * remove duplicate fn * cleanup benchmarking.rs * fix executor tests * remove peer_id from hearbeat as well https://github.com/paritytech/substrate/pull/14251#discussion_r1210887220 * remove MaxPeerDataEncodingSize * change storage value type to `()` https://github.com/paritytech/substrate/pull/14251#discussion_r1214268931 * scaffold storage migration * no need to check the type actually * remove unnecessary types from v0 mod * add a test for migration * expose Config types + pre_upgrade and post_upgrade working fn * fix test * replace dummy type with ConstU32 * add some comments to migration test * fix comment * respond to @bkchr comments * use BoundedOpaqueNetworkState::default intead of using default for each field
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 pallet_im_online::{self as im_online};
#[frame_support::pallet]
pub mod pallet {
use super::*;
use frame_support::pallet_prelude::*;
use frame_system::pallet_prelude::*;
#[pallet::pallet]
pub struct Pallet<T>(_);
#[pallet::config]
pub trait Config: frame_system::Config + im_online::Config {}
#[pallet::call]
impl<T: Config> Pallet<T> {
#[pallet::weight(0)]
pub fn is_online(origin: OriginFor<T>, authority_index: u32) -> DispatchResult {
let _sender = ensure_signed(origin)?;
let _is_online = <im_online::Pallet<T>>::is_online(authority_index);
Ok(())
}
}
}
Dependencies
This module depends on the Session module.
License: Apache-2.0