private async Task <BitcoinApiResult <ApiTransaction[]> > FetchTransactions(DbWallet wallet)
{
var result = new List <ApiTransaction>();
var step = 10;
var accounts = await BitcoinClient.MakeRequest <Dictionary <string, string> >("listaccounts", ToRequestParams(wallet));
if (!string.IsNullOrEmpty(accounts.Error))
{
return(new BitcoinApiResult <ApiTransaction[]>
{
Error = accounts.Error,
Id = accounts.Id,
Result = new ApiTransaction[0],
});
}
using (await Locker.Lock(wallet.Id))
{
foreach (var account in accounts.Result)
{
for (int i = 0; ; i += step)
{
var transactionsResult = await BitcoinClient.MakeRequest <ApiTransaction[]>("listtransactions", ToRequestParams(wallet), account.Key, step, i);
if (!string.IsNullOrEmpty(transactionsResult.Error))
{
return(transactionsResult);
}
if (transactionsResult.Result.Length == 0)
{
break;
}
result.AddRange(transactionsResult.Result);
}
}
return(new BitcoinApiResult <ApiTransaction[]>
{
Result = result.ToArray(),
});
}
}
private (string bitcoindAddress, string user, string password) ToRequestParams(DbWallet wallet)
{
return
(
wallet.BitcoindServerAddress,
wallet.BitcoindUser,
wallet.BitcoindPassword
);
}
private async Task <(bool success, string errorMessage)> AppendTransactions(List <Transaction> result, DbWallet wallet)
{
var transactionsApiResult = await FetchTransactions(wallet);
if (!string.IsNullOrEmpty(transactionsApiResult.Error))
{
return(false, transactionsApiResult.Error);
}
var transactionsFromApi = transactionsApiResult.Result.ToDictionary(x => GetKey(x.TxId, IsSend(x.Category)), x => x, StringComparer.InvariantCulture);
var transactionsFromDb = DataAccessService.GetTransactions(wallet.Id).ToDictionary(x => GetKey(x.TxId, x.Category), x => x, StringComparer.InvariantCulture);
var transactionsToInsertOrUpdate = new List <DbTransactionParam>(transactionsFromApi.Count);
foreach (var transaction in transactionsFromApi)
{
AppendTransaction(transaction, result, transactionsToInsertOrUpdate, transactionsFromDb);
}
if (transactionsToInsertOrUpdate.Count > 0)
{
if (!DataAccessService.InsertOrUpdateTransactions(wallet.Id, transactionsToInsertOrUpdate.ToArray()))
{
return(success : false, errorMessage : "Please try again later.");
}
}
return(true, string.Empty);
string GetKey(string txId, bool send)
{
return($"{txId}_{(send ? 1 : 0)}");
}
}