private State ApplyEvent(State state, EventPayload payload)
{
switch (payload)
{
case AuctionCreated auctionCreated:
return(CreatedState.Create(
auctionCreated.Auction.EndTime,
auctionCreated.Auction.StartingPrice));
case BidPlaced bidPlaced:
return(CreatedState.WithHighestBid(state as CreatedState, bidPlaced.Bid.Amount));
default:
throw new Exception("Unknown event type");
}
}
public static CreatedState WithHighestBid(CreatedState state, decimal amount)
{
return(new CreatedState(state.EndTime, state.StartingPrice, amount));
}