Files
pezkuwi-subxt/substrate/srml
Svyatoslav Nikolsky 3825a21bac Fix light client synchronization on master (#3301)
* value ranges in consensus cache

* skip values in cache

* read epoch0 + epoch1 data from genesis in babe

* sync authorities + session validators at genesis

* removed some debug printlns

* fixed cache encoding

* Revert "skip values in cache"

This reverts commit ce451c32823aaa4b67d99ca5b58f1bf3984df4db.

* Revert "value ranges in consensus cache"

This reverts commit 9062f9434cddd14a01275ddbfcd904b04282e63b.

* get rid of cache::AUTHORITIES in Babe

* cleaning up

* cleaning up

* update spec version

* lost changes

* fixed tests

* Update node/runtime/src/lib.rs

Co-Authored-By: DemiMarie-parity <48690212+DemiMarie-parity@users.noreply.github.com>

* fix once-per-block condition

* fix standalone babe + temp_storage in BuildGenesis

* fix benhes compilation

* fixed comment

* re-added light nodes to integration tests

* finalize_with_ancestors from extra_requests

* post-merge fix

* aaand removed debug code

* (another one)

* fix warn in logs (do not call ForkTree::finalize twice for the same block)

* sync digest.next_authorities with actual next authorities

* more docs

* reverting all commits affecting storage

* also remove keys from babe trait

* fixed warnings

* post-merge fixes

* reverted some redundant changes

* reverted more changes
2019-08-16 11:51:49 +02:00
..
2019-08-12 15:47:29 +02:00
2019-08-14 11:01:41 +02:00
2019-08-06 19:36:23 +02:00

= SRML

The Substrate Runtime Module Library (SRML) is a collection of runtime modules.

== What are runtime modules?

A Substrate runtime can be composed of several smaller components for separation of concerns. These components are called runtime _modules_. Each runtime module packages together a set of functions (dispatchable extrinsic calls, public or private, mutable or immutable), storage items, and events.

There are four primary components that support runtime modules:

=== system module

https://github.com/paritytech/substrate/tree/master/srml/system[`system`] provides low-level APIs and utilities for other modules. https://github.com/paritytech/substrate/tree/master/srml/system[`system`] also defines all core types and extrinsic events for the Substrate runtime. *All modules depend on the system module.*

=== executive module

https://github.com/paritytech/substrate/tree/master/srml/executive[`executive`] dispatches incoming extrinsic calls to the respective modules in the runtime.

=== support macros

https://github.com/paritytech/substrate/tree/master/srml/support[`support` macros] are a collection of Rust macros to facilitate the implementation of common module components. https://github.com/paritytech/substrate/tree/master/srml/support[`support` macros] expand at runtime to generate types (e.g. `Module`, `Call`, `Store`, `Event`) which are thereafter used by the runtime to communicate with the modules. Common support macros include https://crates.parity.io/srml_support/macro.decl_module.html[`decl_module`], https://crates.parity.io/srml_support_procedural/macro.decl_storage.html[`decl_storage`], https://crates.parity.io/srml_support/macro.decl_event.html[`decl_event`], and https://crates.parity.io/srml_support/macro.ensure.html[`ensure`].

=== runtime

The runtime expands the support macros to get type and trait implementations for each module before calling https://github.com/paritytech/substrate/tree/master/srml/executive[`executive`] to dispatch calls to the individual modules. To see an example of how this might look, see https://github.com/paritytech/substrate/blob/master/node/runtime/src/lib.rs[`../node/runtime`].