Staking Async Parachain

Overview

This parachain runtime is a fake fork of the asset-hub next (created original by Donál). It is here to test the async-staking pallet in a real environment.

This parachain contains:

• pallet-staking-async
• pallet-staking-async-rc-client
• pallet-election-provider-multi-block and family
• aux staking pallets pallet-nomination-pools, pallet-fast-unstake, pallet-bags-list, and pallet-delegated-staking.

All of the above are means to stake and select validators for the RELAY-CHAIN, which is eventually communicated to it via the pallet-staking-async-rc-client pallet.

A lot more is in the runtime, and can be eventually removed.

Note that the parachain runtime also contains a pallet-session that works with pallet-collator-selection for the PARACHAIN block author selection.

The counterpart rc runtime is a relay chain that is meant to host the parachain. It contains:

• pallet-staking-async-ah-client
• pallet-session
• pallet-authorship
• And all of the consensus pallets that feed the authority set from the session, such as aura/babe/grandpa/beefy and so on.

Run

To run this, a one-click script is provided:

bash build-and-run-zn.sh

This script will generate chain-specs for both runtimes, and run them with zombie-net.

Make sure you have all Polkadot binaries (polkadot, polkadot-execution-worker and polkadot-prepare-worker) and polkadot-parachain installed in your PATH. You can usually download them from the Polkadot-sdk release page.

You also need chain-spec-builder, but the script builds that and uses a fresh one.

Chain-spec presets

We have tried to move as much of the configuration as possible to different chain-specifications, so that manually tweaking the code is not needed.

The parachain comes with 3 main chain-spec presets.

• development: 100 validator, 2000 nominators, all 2000 nominators in the snapshot, 10 validator to be elected, 4 pages
• dot_size: 2000 validator, 25_000 nominators, 22_500 nominators in the snapshot, 500 validator to be elected, 32 pages
• ksm_size: 4000 validator, 20_000 nominators, 12_500 nominators in the snapshot, 1000 validator to be elected, 16 pages

Both when running the benchmarks (bench.sh) and the chain (build-and-run-zn.sh), you can specify the chain-spec preset. See each file for more info as to how.