Introduction to the pursuit of new subtrate source code - early May: xcm officially launched

20220502 - 202205015

Because of the May Day holiday ,  There are few updates in the first week of May ,  So these two weeks substrate And the technological event of POCA Ecology .

Polkadot Release a new version , XCM Officially launched

5 month 4 Number ,  Boca officially released the news ,  Poca's done  v0.9.19  Version upgrade , One of the important contents of this upgrade , Just go online

adopt  XCM  Message passing between parallel chains

The function of . Boca's vision of cross chain interoperability is thus opened ！

In fact, this version dates back to 4 month 19 The day is already repo Release ,  However, the official launch requires community voting ,  The launch of this version ,  It marks that Boca has officially entered a new cross chain era .

in addition , v0.9.20  and v0.9.21 Respectively in 5 month 5 Number and 5 month 8 The number is repo Release ,  It also needs to be voted to go online .

among v0.9.20  Upgrading is of medium priority ,  It mainly improves the network traffic occupation and shortens the generation time of parallel chain nodes ;  and v0.9.21  Is a high priority ,  To the Dispute Coordinator (

dispute-coordinator

) The information processing mechanism of the network ,  It also optimizes the parallel chain block .

Contract module update

Stable storage related API

contracts

Modules continue to be upgraded steadily ,  This time the two stable API yes

seal_contains_storage

,  Its purpose is to find the specified key value ,  If any, return the quantity ;  and

seal_set_storage

Is to write a KV To the storage layer .

Add configuration parameters to prevent PoV attack

By means of

contracts

Module configuration

Config

trait One more in

ContractAccessWeight

The type of ,  To prevent PoV attack .  At the same time, a default conservative value of this type is given ,  Its value is due to BlockWeights  Block weight and maximum PoV value maxPovSize  Come by calculation ,  The value is Polkadot and Kusama Set to

5242880

.

utility pallet New forced batch call function

to utility pallet  I added a new one

force_batch 

Call to ,  This call forces a series of

Call

,  Even if some of them

Call

Call exceptions or return errors may occur ,  It won't affect other

Call

Call to ;  Similar to parallel calls .

take Nomination Pool Add to Kusama in

It has been continuously updated in recent weeks

Nomination Pool

,  After deploying in the test network last week ,  This week it was updated to Kusama in .

It is believed that the module will be officially launched in the near future .

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

Unauthorized ,  Do not reprint .