public static bool TryGetBy <TKey>(this LightningTransaction txn, LightningDatabase db, TKey key, out GetByOperation value)
{
byte[] valueBytes;
var keyBytes = db.ToBytes(key);
var result = txn.TryGet(db, keyBytes, out valueBytes);
value = result
? new GetByOperation(db, valueBytes)
: null;
return(result);
}
/// <summary>
/// Tries obtaining a value by key
/// </summary>
/// <typeparam name="TKey">Type of a key.</typeparam>
/// <param name="txn">A transaction.</param>
/// <param name="key">Key.</param>
/// <param name="value">Obtained value converter if successful.</param>
/// <returns>Returns true if key-value pair exists in database or false if not.</returns>
public static bool TryGetBy <TKey>(this LightningTransaction txn, TKey key, out GetByOperation value)
{
return(txn.TryGetBy(key, out value));
}