public async Task Scan(string sku, Guid correlationId)
{
var @event = new ItemScanned(sku, _priceList.PriceFor(sku));
var itemScannedEventData = new EventData(
Guid.NewGuid(),
nameof(ItemScanned),
true,
Encoding.UTF8.GetBytes(JsonConvert.SerializeObject(@event)),
Encoding.UTF8.GetBytes(correlationId.ToString()));
await _eventStoreConnection.AppendToStreamAsync($"basket-{correlationId}", ExpectedVersion.Any,
itemScannedEventData);
}
private void Apply(ItemScanned itemScanned) => Total += itemScanned.Price;