public async Task <decimal> ConvertDollarToBTC(decimal dollarAmount, ConvertDollarToBTCType dollarType)
{
try
{
var cacheResult = await CacheService.GetOrSetHybridValueAsync(CacheKey.ConvertDollarToBTC(dollarAmount, dollarType), TimeSpan.FromMinutes(120), async() =>
{
using (var client = new WebClient())
{
decimal amount = 0m;
var uri = new Uri($"https://blockchain.info/tobtc?currency={dollarType}&value={dollarAmount}");
var result = await client.DownloadStringTaskAsync(uri).ConfigureAwait(false);
if (string.IsNullOrEmpty(result))
{
return(amount);
}
decimal.TryParse(result, out amount);
return(amount);
}
}).ConfigureAwait(false);
if (cacheResult == 0m)
{
await CacheService.InvalidateAsync(CacheKey.ConvertDollarToBTC(dollarAmount, dollarType));
}
return(cacheResult);
}
catch
{
}
await CacheService.InvalidateAsync(CacheKey.ConvertDollarToBTC(dollarAmount, dollarType));
return(0m);
}