Bastian Köcher
2f5f4fe858
We call `offchain_worker` with the state of the imported block and pass the header of this block. However in the runtime we call all `offchain_worker` functions with the number of the parent block. Besides that we also pass all digests and not only the pre runtime digests. In the context where the offchain worker is executed we have all digests, so there is no real reason to only pass pre runtime digests. Another fix is that we also insert the hash of the current header into the block hash map.
Executive Module
The Executive module acts as the orchestration layer for the runtime. It dispatches incoming extrinsic calls to the respective modules in the runtime.
Overview
The executive module is not a typical pallet providing functionality around a specific feature. It is a cross-cutting framework component for the FRAME. It works in conjunction with the FRAME System module to perform these cross-cutting functions.
The Executive module provides functions to:
- Check transaction validity.
- Initialize a block.
- Apply extrinsics.
- Execute a block.
- Finalize a block.
- Start an off-chain worker.
Implementations
The Executive module provides the following implementations:
ExecuteBlock: Trait that can be used to execute a block.Executive: Type that can be used to make the FRAME available from the runtime.
Usage
The default Substrate node template declares the Executive type in its library.
Example
Executive type declaration from the node template.
#
/// Executive: handles dispatch to the various modules.
pub type Executive = executive::Executive<Runtime, Block, Context, Runtime, AllModules>;
Custom OnRuntimeUpgrade logic
You can add custom logic that should be called in your runtime on a runtime upgrade. This is done by setting an optional generic parameter. The custom logic will be called before the on runtime upgrade logic of all modules is called.
#
struct CustomOnRuntimeUpgrade;
impl frame_support::traits::OnRuntimeUpgrade for CustomOnRuntimeUpgrade {
fn on_runtime_upgrade() -> frame_support::weights::Weight {
// Do whatever you want.
0
}
}
pub type Executive = executive::Executive<Runtime, Block, Context, Runtime, AllModules, CustomOnRuntimeUpgrade>;
License: Apache-2.0