public async Task <TransactionResult> GetTransactionAsync(uint256 txId, CancellationToken cancellation = default(CancellationToken))
{
if (txId == null)
{
throw new ArgumentNullException(nameof(txId));
}
var tx = _Cache.GetTransaction(txId);
if (tx != null)
{
return(tx);
}
tx = await _Client.GetTransactionAsync(txId, cancellation);
_Cache.AddToCache(tx);
return(tx);
}