public async Task ChangeBalanceAsync(string traderId, string currency, double delta)
{
var partitionKey = TraderBalanceEntity.GeneratePartitionKey(traderId);
var rowKey = TraderBalanceEntity.GenerateRowKey(currency);
var entity = await _tableStorage.ReplaceAsync(partitionKey, rowKey, itm =>
{
itm.Amount += delta;
return(itm);
});
if (entity != null)
{
return;
}
entity = TraderBalanceEntity.Create(traderId, currency);
entity.Amount = delta;
await _tableStorage.InsertAsync(entity);
}
public async Task <IEnumerable <ITraderBalance> > GetAsync(string traderId)
{
var partitionKey = TraderBalanceEntity.GeneratePartitionKey(traderId);
return(await _tableStorage.GetDataAsync(partitionKey));
}