private void Persist(Block block)
{
using (SnapshotCache snapshot = system.GetSnapshot())
{
List <ApplicationExecuted> all_application_executed = new List <ApplicationExecuted>();
using (ApplicationEngine engine = ApplicationEngine.Create(TriggerType.OnPersist, null, snapshot, block))
{
engine.LoadScript(onPersistScript);
if (engine.Execute() != VMState.HALT)
{
throw new InvalidOperationException();
}
ApplicationExecuted application_executed = new ApplicationExecuted(engine);
Context.System.EventStream.Publish(application_executed);
all_application_executed.Add(application_executed);
}
DataCache clonedSnapshot = snapshot.CreateSnapshot();
// Warning: Do not write into variable snapshot directly. Write into variable clonedSnapshot and commit instead.
foreach (Transaction tx in block.Transactions)
{
using (ApplicationEngine engine = ApplicationEngine.Create(TriggerType.Application, tx, clonedSnapshot, block, tx.SystemFee))
{
engine.LoadScript(tx.Script);
if (engine.Execute() == VMState.HALT)
{
clonedSnapshot.Commit();
}
else
{
clonedSnapshot = snapshot.CreateSnapshot();
}
ApplicationExecuted application_executed = new ApplicationExecuted(engine);
Context.System.EventStream.Publish(application_executed);
all_application_executed.Add(application_executed);
}
}
using (ApplicationEngine engine = ApplicationEngine.Create(TriggerType.PostPersist, null, snapshot, block))
{
engine.LoadScript(postPersistScript);
if (engine.Execute() != VMState.HALT)
{
throw new InvalidOperationException();
}
ApplicationExecuted application_executed = new ApplicationExecuted(engine);
Context.System.EventStream.Publish(application_executed);
all_application_executed.Add(application_executed);
}
foreach (IPersistencePlugin plugin in Plugin.PersistencePlugins)
{
plugin.OnPersist(block, snapshot, all_application_executed);
}
snapshot.Commit();
List <Exception> commitExceptions = null;
foreach (IPersistencePlugin plugin in Plugin.PersistencePlugins)
{
try
{
plugin.OnCommit(block, snapshot);
}
catch (Exception ex)
{
if (plugin.ShouldThrowExceptionFromCommit(ex))
{
if (commitExceptions == null)
{
commitExceptions = new List <Exception>();
}
commitExceptions.Add(ex);
}
}
}
if (commitExceptions != null)
{
throw new AggregateException(commitExceptions);
}
system.MemPool.UpdatePoolForBlockPersisted(block, snapshot);
}
extensibleWitnessWhiteList = null;
block_cache.Remove(block.PrevHash);
Context.System.EventStream.Publish(new PersistCompleted {
Block = block
});
if (system.HeaderCache.TryRemoveFirst(out Header header))
{
Debug.Assert(header.Index == block.Index);
}
}
