public DbCache(LTLightDB db, LTISnapShot snapshot, LTWriteTask batch, byte prefix)
{
this.db = db;
this.snapshot = snapshot ?? db.UseSnapShot();
this.batch = batch;
this.prefix = prefix;
}
public DbMetaDataCache(LTLightDB db, LTISnapShot snapshot, LTWriteTask batch, byte prefix, Func <T> factory = null)
: base(factory)
{
this.db = db;
this.snapshot = snapshot ?? db.UseSnapShot();
this.batch = batch;
this.prefix = prefix;
}
public DbCache(DB db, LTISnapshot _snapshot, LTWriteTask batch, byte prefix)
{
this.db = db;
snapshot = _snapshot ?? db.UseSnapShot();
this.options = options ?? ReadOptions.Default;
this.batch = batch;
this.prefix = prefix;
}
public DbSnapshot(DB db)
{
this.db = db;
this.snapshot = db.UseSnapShot();
this.batch = db.CreateWriteTask();
Blocks = new DbCache <UInt256, BlockState>(db, snapshot, batch, Prefixes.DATA_Block);
Transactions = new DbCache <UInt256, TransactionState>(db, snapshot, batch, Prefixes.DATA_Transaction);
Accounts = new DbCache <UInt160, AccountState>(db, snapshot, batch, Prefixes.ST_Account);
UnspentCoins = new DbCache <UInt256, UnspentCoinState>(db, snapshot, batch, Prefixes.ST_Coin);
SpentCoins = new DbCache <UInt256, SpentCoinState>(db, snapshot, batch, Prefixes.ST_SpentCoin);
Validators = new DbCache <ECPoint, ValidatorState>(db, snapshot, batch, Prefixes.ST_Validator);
Assets = new DbCache <UInt256, AssetState>(db, snapshot, batch, Prefixes.ST_Asset);
Contracts = new DbCache <UInt160, ContractState>(db, snapshot, batch, Prefixes.ST_Contract);
Storages = new DbCache <StorageKey, StorageItem>(db, snapshot, batch, Prefixes.ST_Storage);
HeaderHashList = new DbCache <UInt32Wrapper, HeaderHashList>(db, snapshot, batch, Prefixes.IX_HeaderHashList);
ValidatorsCount = new DbMetaDataCache <ValidatorsCountState>(db, snapshot, batch, Prefixes.IX_ValidatorsCount);
BlockHashIndex = new DbMetaDataCache <HashIndexState>(db, snapshot, batch, Prefixes.IX_CurrentBlock);
HeaderHashIndex = new DbMetaDataCache <HashIndexState>(db, snapshot, batch, Prefixes.IX_CurrentHeader);
}
public static IEnumerable <T> Find <T>(this DB db, LTISnapshot snapshot, Slice prefix, Func <Slice, Slice, T> resultSelector)
{
LTIKeyIterator it = snapshot.CreateKeyIterator(new byte[] { }, prefix.buffer);
{
while (it.MoveNext())
{
byte[] key = it.Current;
byte[] y = prefix.ToArray();
if (key.Length < y.Length)
{
break;
}
if (!key.Take(y.Length).SequenceEqual(y))
{
break;
}
byte[] value = snapshot.GetValue(new byte[] { }, key).value;
yield return(resultSelector(new Slice(key), new Slice(value)));
}
}
}
public static IEnumerable <T> Find <T>(this DB db, LTISnapshot snapshot, byte prefix) where T : class, ISerializable, new()
{
return(Find(db, snapshot, SliceBuilder.Begin(prefix), (k, v) => v.ToArray().AsSerializable <T>()));
}
