Auctions pallet design

[ilionic]

Calls

The external dispatchable calls. i.e. The methods user can invoke by sending a
transaction

Auctions pallet. Should extend NFT Core
Should implement offchain worker to monitor auctions end time to conclude auction

• create_auction(origin: OriginFor, auction_info: AuctionInfoOf)
  • AuctionInfoOf consists of AccountId, BalanceOf, BlockNumber, CollectionId, NftId
• bid_value(origin: OriginFor, id: T::AuctionId, value: BalanceOf)
• delete_auction(origin: OriginFor, id: T::AuctionId)

Storages

Defines how to access on-chain storage

Auctions

Stores on-going and future auctions. Closed auction are removed.

pub type Auctions<T: Config> = StorageMap<_,
    Twox64Concat, T::AuctionId, AuctionInfoOf<T>, OptionQuery>;

AuctionEndTime

Index auctions by end time.

pub type AuctionEndTime<T: Config> = StorageDoubleMap<_, 
    Twox64Concat, T::BlockNumber, Twox64Concat, T::AuctionId, (), OptionQuery>;

AuctionOwnerById

Auction owner by ID

type AuctionOwnerById<T: Config> = StorageMap<_, 
    Twox64Concat, T::AuctionId, T::AccountId, ValueQuery>;

Types

Events

Defines the events that could be emitted by this pallet to indicate what happened

pub enum Event<T: Config> {
    /// Auction created
    AuctionCreated(T::AccountId, T::AuctionId),
    /// A bid is placed
    Bid(T::AuctionId, T::AccountId, BalanceOf<T>),
    /// Auction ended
    AuctionConcluded(T::AuctionId),
    /// Auction removed
    AuctionRemoved(T::AuctionId),
}