Introduction to the renewal of substrate source code: the pledge amount is greatly reduced, and rocksdb can be completely disabled

20220613 - 20220619

Cumulus Rename executable

Although this is a minor correction ,  But it's a little special ,  Before cumulus The generated default executable is named

polkadot-parachain

,  But the name in the source code is

parachain-collator

,  It is easy to confuse the openers ,  But in this week's update ,  This configuration error was corrected

details : 

https://github.com/paritytech/substrate/pull/11112

Cumulus Release V9230  edition

After last week Polkadot and substrate Released 0.9.23 After version source code , cumulus This week, the source code was updated and released v9230 edition ,  It is also a minor version update .

details : 

https://github.com/paritytech/polkadot/pull/5634

The relay chain council can now send XCM Instructions

This week, Polkadot The relay chain adds a new cross chain function ,  For the Council module

Council

Added can send XCM The function of ,  stay

xcm_config

There's one added to it

pub type CouncilToPlurality

The type of ,  Also for Kusama To achieve the relevant runtime To configure .

details : https://github.com/paritytech/polkadot/pull/5597

Transaction Payment Module add event

This week at Transaction Payment Module ,  add to Event event ,  The main events are as follows :

pub enum Event<T: Config> {
 /// A transaction fee `actual_fee`, of which `tip` was added to the minimum inclusion fee,
 /// has been paid by `who`.
 TransactionFeePaid { who: T::AccountId, actual_fee: BalanceOf<T>, tip: BalanceOf<T> },
 }


And provides Balances Related implementation ,  and mock as well as test The implementation of the .

details : https://github.com/paritytech/substrate/pull/11618

Assets and NFT The pledge amount of is reduced 10 times

In an update this week ,  take Statemine, Statemint, Westmint,  and  Contracts-Rococo Related to Assets and NFT The amount of pledge required is greatly reduced ,  reach 10 Twice as many .  For example, before Statemint in Assets The constant amount of pledge is  

constants::currency::deposit(items, bytes) / 10

,  Now reduced to

constants::currency::deposit(items, bytes) / 100

,  The purpose of this is to meet the common practices of other mainstream platforms ,  It is really inappropriate to pledge too much . ‍️

details : https://github.com/paritytech/cumulus/pull/1332

RocksDB Can be completely disable

RocksDB Has always been a substrate The main storage backend ,  With ParityDB The maturity of this dedicated storage layer , 4 The month will be ParityDB The experimental properties of the have been removed ,  This indicates that Substrate The storage backend of is completely switched to ParityDB On ,  So in this week's update ,  In the future RocksDB thoroughly disable 了 .

details : https://github.com/paritytech/substrate/pull/11537

This paper is about SEP Creation  Original group articles ,  By pengyalun

Unauthorized ,  Do not reprint .