This article analyzes what is a "public welfare" parachain

PolkaWorld

特邀专栏作者

2021-08-10 10:26 (UTC+8)

This article is about 1581 words, reading the full article takes about 3 minutes

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overview

“Non-good” parachains are parachain slots reserved for functions that benefit the entire ecosystem. By allocating a portion of parachain slots to nonprofit parachains, the entire network can enjoy the benefits of valuable parachains that would otherwise be underfunded due to the “free-rider” problem. Their slots are not won through parachain auctions, but allocated by the on-chain governance system. Under normal circumstances, the lease of a public welfare parachain will not expire, and it can only be removed through governance.

These parachains can be divided into two categories: system-level parachains or public usage chains.

System level parachain

The system-level parachain transfers functions from the relay chain to the parachain, minimizing the management usage of the relay chain. For example, a governance parachain could move all governance processes from the relay chain into the parachain. Adding a system-level parachain is usually non-controversial, as they simply move useful functionality that stakeholders have agreed to from one place (the relay chain) to another (the parachain).

Offloading logic from the relay chain to parachains is an optimization that can make the entire network more efficient. Moving system logic to parachains frees up capacity in the Relay Chain for its primary function of validating parachains. Adding system-level parachains enables the network to handle more parachains. Instead of taking a slice of the pie of 100 parachains, system-level parachains slice and bake a larger pie.

The vast majority of public welfare parachains are likely to be unconstrained system-level parachains.

public usage chain

Public use chains are adding functionality that isn't there yet, but that stakeholders believe will benefit the entire network. Because public use chains add new features, their additions have a subjective component: stakeholders of the network must believe that allocating a free slot is worthwhile, otherwise the slot will be allocated to the winner of the auction, so There is an objective expression of belief from its supporters. Governance provides the means to internalize the value of parachain slots and distribute it across all members of the network.

The public usage chain will always be fully consistent with the relay chain. This means that they will adopt the native token of the relay chain (ie DOT or KSM) as their native token and accept any incoming messages from the relay chain and system-level parachains.

Some examples of potential public use chains are bridges, DOT/KSM denominated smart contract platforms, and general asset chains.

Public use of parachains typically grants privileged business logic to Polkadot's governance. Just as the Polkadot relay chain has several privileged functions, such as setting the number of validators or distributing DOTs from the treasury, these parachains can also have privileged functions, such as changing system parameters or triggering upgrades.

As public use chains add functionality outside the scope of the relay chain, they are likely to be approved by network stakeholders only in rare cases.

Statemint

Public welfare parachains under development

Statemint (and its cousin Statemine on Kusama) is one of the first general-purpose nonprofit parachains. Statemint is a public utility chain because it adds functionality not found in the Relay Chain, namely the creation and management of assets.

Statemint will support fungible and non-fungible assets. The chain provides an ERC-20-like interface for fungible assets and an ERC-721-like interface for non-fungible tokens, within the logic of the chain itself; by coding this logic directly into the Statemint runtime , token storage and operations do not need to be metered and can happen faster and cheaper.

Like most nonprofit parachains, Statemint will use the DOT token as its native token. Statemint trusts messages from the relay chain about balances, so users can transfer DOTs from the relay chain to their address on Statemint and back.

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