Crate pallet_parachain_template

Template Pallet

A pallet with minimal functionality to help developers understand the essential components of writing a FRAME pallet. It is typically used in beginner tutorials or in Polkadot SDK template as a starting point for creating a new pallet and not meant to be used in production.

Overview

This template pallet contains basic examples of:

• declaring a storage item that stores a single block-number
• declaring and using events
• declaring and using errors
• a dispatchable function that allows a user to set a new value to storage and emits an event upon success
• another dispatchable function that causes a custom error to be thrown

Each pallet section is annotated with an attribute using the #[pallet::...] procedural macro. This macro generates the necessary code for a pallet to be aggregated into a FRAME runtime.

To get started with pallet development, consider using this tutorial:

https://paritytech.github.io/polkadot-sdk/master/polkadot_sdk_docs/guides/your_first_pallet/index.html

And reading the main documentation of the frame crate:

https://paritytech.github.io/polkadot-sdk/master/polkadot_sdk_docs/polkadot_sdk/frame_runtime/index.html

And looking at the frame kitchen-sink pallet, a showcase of all pallet macros.

Pallet Sections

The pallet sections in this template are:

• A configuration trait that defines the types and parameters which the pallet depends on (denoted by the #[pallet::config] attribute). See: Config.
• A means to store pallet-specific data (denoted by the #[pallet::storage] attribute). See: storage_types.
• A declaration of the events this pallet emits (denoted by the #[pallet::event] attribute). See: Event.
• A declaration of the errors that this pallet can throw (denoted by the #[pallet::error] attribute). See: Error.
• A set of dispatchable functions that define the pallet’s functionality (denoted by the #[pallet::call] attribute). See: dispatchables.

Run cargo doc --package pallet-template --open to view this pallet’s documentation.

Re-exports

• pub use pallet::*;

Modules

• pallet
  The pallet module in each FRAME pallet hosts the most important items needed to construct this pallet.
• weights
  Autogenerated weights for pallet_template