唯一性、自定义类型和存储映射
接下来几个基础步骤，使用以下代码段更新您的pallet代码（如果您不想使用模板代码，请跳过此步骤）：
#![cfg_attr(not(feature = "std"), no_std)] pub use pallet::*; #[frame_support::pallet] pub mod pallet {
use frame_support::pallet_prelude::*; use frame_system::pallet_prelude::*; use frame_support::{
sp_runtime::traits::Hash, traits::{
Randomness, Currency, tokens::ExistenceRequirement }, transactional }; use sp_io::hashing::blake2_128; #[cfg(feature = "std")] use frame_support::serde::{
Deserialize, Serialize}; // ACTION #1: Write a Struct to hold Kitty information. // ACTION #2: Enum declaration for Gender. // ACTION #3: Implementation to handle Gender type in Kitty struct. #[pallet::pallet] #[pallet::generate_store(pub(super) trait Store)] pub struct Pallet<T>(_); /// Configure the pallet by specifying the parameters and types it depends on. #[pallet::config] pub trait Config: frame_system::Config {
/// Because this pallet emits events, it depends on the runtime's definition of an event. type Event: From<Event<Self>> + IsType<<Self as frame_system::Config>::Event>; /// The Currency handler for the Kitties pallet. type Currency: Currency<Self::AccountId>; // ACTION #5: Specify the type for Randomness we want to specify for runtime. // ACTION #9: Add MaxKittyOwned constant } // Errors. #[pallet::error] pub enum Error<讯享网
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