private HashHeightPair GetTipHash(Types.SessionWrapper session)
{
if (this.blockHash == null)
{
Types.StoreInput input = new Types.StoreInput();
Types.StoreOutput output = new Types.StoreOutput();
var lastblockKey = new Types.StoreKey {
tableType = "BlockHash", key = blockHashKey
};
Types.StoreContext context = new Types.StoreContext();
var blkStatus = session.Session.Read(ref lastblockKey, ref input, ref output, context, 1); // TODO: use height a serial number?
if (blkStatus == Status.OK)
{
this.blockHash = new HashHeightPair();
this.blockHash.FromBytes(output.value.value);
}
}
return(this.blockHash);
}
public FetchCoinsResponse FetchCoins(OutPoint[] utxos)
{
FetchCoinsResponse res = new FetchCoinsResponse();
using (var session = this.db.NewSession())
{
using (new StopwatchDisposable(o => this.performanceCounter.AddQueryTime(o)))
{
this.performanceCounter.AddQueriedEntities(utxos.Length);
Types.StoreInput input = new Types.StoreInput();
Types.StoreOutput output = new Types.StoreOutput();
Types.StoreContext context = new Types.StoreContext();
var readKey = new Types.StoreKey {
tableType = "Coins"
};
foreach (OutPoint outPoint in utxos)
{
output.value = null;
readKey.key = outPoint.ToBytes();
var addStatus = session.Read(ref readKey, ref input, ref output, context, 1);
if (addStatus == Status.PENDING)
{
session.CompletePending(true);
context.FinalizeRead(ref addStatus, ref output);
}
Coins outputs = addStatus == Status.OK ? this.dataStoreSerializer.Deserialize <Coins>(output.value.value) : null;
this.logger.LogDebug("Outputs for '{0}' were {1}.", outPoint, outputs == null ? "NOT loaded" : "loaded");
res.UnspentOutputs.Add(outPoint, new UnspentOutput(outPoint, outputs));
}
}
}
return(res);
}
public HashHeightPair Rewind()
{
HashHeightPair res = null;
using (var session = this.db.NewSession())
{
var wrapper = new Types.SessionWrapper {
Session = session
};
HashHeightPair current = this.GetTipHash(wrapper);
Types.StoreInput input1 = new Types.StoreInput();
Types.StoreOutput output1 = new Types.StoreOutput();
Types.StoreContext context = new Types.StoreContext();
var readKey = new Types.StoreKey {
tableType = "Rewind", key = BitConverter.GetBytes(current.Height)
};
var addStatus = session.Read(ref readKey, ref input1, ref output1, context, 1);
if (addStatus == Status.PENDING)
{
session.CompletePending(true);
context.FinalizeRead(ref addStatus, ref output1);
}
if (addStatus != Status.OK)
{
throw new InvalidOperationException($"No rewind data found for block `{current}`");
}
var deteletKey = new Types.StoreKey {
tableType = "Rewind", key = BitConverter.GetBytes(current.Height)
};
Types.StoreContext contextDel = new Types.StoreContext();
var deleteStatus = session.Delete(ref readKey, contextDel, 1);
if (deleteStatus != Status.OK)
{
throw new Exception();
}
var rewindData = this.dataStoreSerializer.Deserialize <RewindData>(output1.value.value);
this.SetBlockHash(wrapper, rewindData.PreviousBlockHash);
foreach (OutPoint outPoint in rewindData.OutputsToRemove)
{
this.logger.LogDebug("Outputs of outpoint '{0}' will be removed.", outPoint);
deteletKey = new Types.StoreKey {
tableType = "Coins", key = outPoint.ToBytes()
};
contextDel = new Types.StoreContext();
deleteStatus = session.Delete(ref readKey, contextDel, 1);
if (deleteStatus != Status.OK)
{
throw new Exception();
}
}
foreach (RewindDataOutput rewindDataOutput in rewindData.OutputsToRestore)
{
this.logger.LogDebug("Outputs of outpoint '{0}' will be restored.", rewindDataOutput.OutPoint);
var upsertKey = new Types.StoreKey {
tableType = "Coins", key = rewindDataOutput.OutPoint.ToBytes()
};
var upsertValue = new Types.StoreValue {
value = this.dataStoreSerializer.Serialize(rewindDataOutput.Coins)
};
Types.StoreContext context2 = new Types.StoreContext();
addStatus = session.Upsert(ref upsertKey, ref upsertValue, context2, 1);
if (addStatus != Status.OK)
{
throw new Exception();
}
}
res = rewindData.PreviousBlockHash;
}
return(res);
}