public LevelDBBlockchain(string path)
{
header_index.Add(GenesisBlock.Hash);
Version version;
Slice value;
db = DB.Open(path, new Options {
CreateIfMissing = true
});
if (db.TryGet(ReadOptions.Default, SliceBuilder.Begin(DataEntryPrefix.SYS_Version), out value) && Version.TryParse(value.ToString(), out version) && version >= Version.Parse("2.7.4"))
{
ReadOptions options = new ReadOptions {
FillCache = false
};
value = db.Get(options, SliceBuilder.Begin(DataEntryPrefix.SYS_CurrentBlock));
UInt256 current_header_hash = new UInt256(value.ToArray().Take(32).ToArray());
this.current_block_height = value.ToArray().ToUInt32(32);
uint current_header_height = current_block_height;
if (db.TryGet(options, SliceBuilder.Begin(DataEntryPrefix.SYS_CurrentHeader), out value))
{
current_header_hash = new UInt256(value.ToArray().Take(32).ToArray());
current_header_height = value.ToArray().ToUInt32(32);
}
foreach (UInt256 hash in db.Find(options, SliceBuilder.Begin(DataEntryPrefix.IX_HeaderHashList), (k, v) =>
{
using (MemoryStream ms = new MemoryStream(v.ToArray(), false))
using (BinaryReader r = new BinaryReader(ms))
{
return(new
{
Index = k.ToArray().ToUInt32(1),
Hashes = r.ReadSerializableArray <UInt256>()
});
}
}).OrderBy(p => p.Index).SelectMany(p => p.Hashes).ToArray())
{
if (!hash.Equals(GenesisBlock.Hash))
{
header_index.Add(hash);
}
stored_header_count++;
}
if (stored_header_count == 0)
{
Header[] headers = db.Find(options, SliceBuilder.Begin(DataEntryPrefix.DATA_Block), (k, v) => Header.FromTrimmedData(v.ToArray(), sizeof(long))).OrderBy(p => p.Index).ToArray();
for (int i = 1; i < headers.Length; i++)
{
header_index.Add(headers[i].Hash);
}
}
else if (current_header_height >= stored_header_count)
{
for (UInt256 hash = current_header_hash; hash != header_index[(int)stored_header_count - 1];)
{
Header header = Header.FromTrimmedData(db.Get(options, SliceBuilder.Begin(DataEntryPrefix.DATA_Block).Add(hash)).ToArray(), sizeof(long));
header_index.Insert((int)stored_header_count, hash);
hash = header.PrevHash;
}
}
}
else
{
WriteBatch batch = new WriteBatch();
ReadOptions options = new ReadOptions {
FillCache = false
};
using (Iterator it = db.NewIterator(options))
{
for (it.SeekToFirst(); it.Valid(); it.Next())
{
batch.Delete(it.Key());
}
}
db.Write(WriteOptions.Default, batch);
Persist(GenesisBlock);
db.Put(WriteOptions.Default, SliceBuilder.Begin(DataEntryPrefix.SYS_Version), GetType().GetTypeInfo().Assembly.GetName().Version.ToString());
}
thread_persistence = new Thread(PersistBlocks);
thread_persistence.Name = "LevelDBBlockchain.PersistBlocks";
thread_persistence.Priority = ThreadPriority.AboveNormal;
thread_persistence.Start();
}
private void Persist(Block block)
{
WriteBatch batch = new WriteBatch();
DbCache <UInt160, AccountState> accounts = new DbCache <UInt160, AccountState>(db, DataEntryPrefix.ST_Account, batch);
DbCache <UInt256, UnspentCoinState> unspentcoins = new DbCache <UInt256, UnspentCoinState>(db, DataEntryPrefix.ST_Coin, batch);
DbCache <UInt256, SpentCoinState> spentcoins = new DbCache <UInt256, SpentCoinState>(db, DataEntryPrefix.ST_SpentCoin, batch);
DbCache <ECPoint, ValidatorState> validators = new DbCache <ECPoint, ValidatorState>(db, DataEntryPrefix.ST_Validator, batch);
DbCache <UInt256, AssetState> assets = new DbCache <UInt256, AssetState>(db, DataEntryPrefix.ST_Asset, batch);
DbCache <UInt160, ContractState> contracts = new DbCache <UInt160, ContractState>(db, DataEntryPrefix.ST_Contract, batch);
DbCache <StorageKey, StorageItem> storages = new DbCache <StorageKey, StorageItem>(db, DataEntryPrefix.ST_Storage, batch);
DbMetaDataCache <ValidatorsCountState> validators_count = new DbMetaDataCache <ValidatorsCountState>(db, DataEntryPrefix.IX_ValidatorsCount);
CachedScriptTable script_table = new CachedScriptTable(contracts);
long amount_sysfee = GetSysFeeAmount(block.PrevHash) + (long)block.Transactions.Sum(p => p.SystemFee);
batch.Put(SliceBuilder.Begin(DataEntryPrefix.DATA_Block).Add(block.Hash), SliceBuilder.Begin().Add(amount_sysfee).Add(block.Trim()));
foreach (Transaction tx in block.Transactions)
{
batch.Put(SliceBuilder.Begin(DataEntryPrefix.DATA_Transaction).Add(tx.Hash), SliceBuilder.Begin().Add(block.Index).Add(tx.ToArray()));
unspentcoins.Add(tx.Hash, new UnspentCoinState
{
Items = Enumerable.Repeat(CoinState.Confirmed, tx.Outputs.Length).ToArray()
});
foreach (TransactionOutput output in tx.Outputs)
{
AccountState account = accounts.GetAndChange(output.ScriptHash, () => new AccountState(output.ScriptHash));
if (account.Balances.ContainsKey(output.AssetId))
{
account.Balances[output.AssetId] += output.Value;
}
else
{
account.Balances[output.AssetId] = output.Value;
}
if (output.AssetId.Equals(GoverningToken.Hash) && account.Votes.Length > 0)
{
foreach (ECPoint pubkey in account.Votes)
{
validators.GetAndChange(pubkey, () => new ValidatorState(pubkey)).Votes += output.Value;
}
validators_count.GetAndChange().Votes[account.Votes.Length - 1] += output.Value;
}
}
foreach (var group in tx.Inputs.GroupBy(p => p.PrevHash))
{
Transaction tx_prev = GetTransaction(ReadOptions.Default, group.Key, out int height);
foreach (CoinReference input in group)
{
unspentcoins.GetAndChange(input.PrevHash).Items[input.PrevIndex] |= CoinState.Spent;
TransactionOutput out_prev = tx_prev.Outputs[input.PrevIndex];
AccountState account = accounts.GetAndChange(out_prev.ScriptHash);
if (out_prev.AssetId.Equals(GoverningToken.Hash))
{
spentcoins.GetAndChange(input.PrevHash, () => new SpentCoinState
{
TransactionHash = input.PrevHash,
TransactionHeight = (uint)height,
Items = new Dictionary <ushort, uint>()
}).Items.Add(input.PrevIndex, block.Index);
if (account.Votes.Length > 0)
{
foreach (ECPoint pubkey in account.Votes)
{
ValidatorState validator = validators.GetAndChange(pubkey);
validator.Votes -= out_prev.Value;
if (!validator.Registered && validator.Votes.Equals(Fixed8.Zero))
{
validators.Delete(pubkey);
}
}
validators_count.GetAndChange().Votes[account.Votes.Length - 1] -= out_prev.Value;
}
}
account.Balances[out_prev.AssetId] -= out_prev.Value;
}
}
switch (tx)
{
#pragma warning disable CS0612
case RegisterTransaction tx_register:
assets.Add(tx.Hash, new AssetState
{
AssetId = tx_register.Hash,
AssetType = tx_register.AssetType,
Name = tx_register.Name,
Amount = tx_register.Amount,
Available = Fixed8.Zero,
Precision = tx_register.Precision,
Fee = Fixed8.Zero,
FeeAddress = new UInt160(),
Owner = tx_register.Owner,
Admin = tx_register.Admin,
Issuer = tx_register.Admin,
Expiration = block.Index + 2 * 2000000,
IsFrozen = false
});
break;
#pragma warning restore CS0612
case IssueTransaction _:
foreach (TransactionResult result in tx.GetTransactionResults().Where(p => p.Amount < Fixed8.Zero))
{
assets.GetAndChange(result.AssetId).Available -= result.Amount;
}
break;
case ClaimTransaction _:
foreach (CoinReference input in ((ClaimTransaction)tx).Claims)
{
if (spentcoins.TryGet(input.PrevHash)?.Items.Remove(input.PrevIndex) == true)
{
spentcoins.GetAndChange(input.PrevHash);
}
}
break;
#pragma warning disable CS0612
case EnrollmentTransaction tx_enrollment:
validators.GetAndChange(tx_enrollment.PublicKey, () => new ValidatorState(tx_enrollment.PublicKey)).Registered = true;
break;
#pragma warning restore CS0612
case StateTransaction tx_state:
foreach (StateDescriptor descriptor in tx_state.Descriptors)
{
switch (descriptor.Type)
{
case StateType.Account:
ProcessAccountStateDescriptor(descriptor, accounts, validators, validators_count);
break;
case StateType.Validator:
ProcessValidatorStateDescriptor(descriptor, validators);
break;
}
}
break;
#pragma warning disable CS0612
case PublishTransaction tx_publish:
contracts.GetOrAdd(tx_publish.ScriptHash, () => new ContractState
{
Script = tx_publish.Script,
ParameterList = tx_publish.ParameterList,
ReturnType = tx_publish.ReturnType,
ContractProperties = (ContractPropertyState)Convert.ToByte(tx_publish.NeedStorage),
Name = tx_publish.Name,
CodeVersion = tx_publish.CodeVersion,
Author = tx_publish.Author,
Email = tx_publish.Email,
Description = tx_publish.Description
});
break;
#pragma warning restore CS0612
case InvocationTransaction tx_invocation:
using (StateMachine service = new StateMachine(block, accounts, assets, contracts, storages))
{
ApplicationEngine engine = new ApplicationEngine(TriggerType.Application, tx_invocation, script_table, service, tx_invocation.Gas);
engine.LoadScript(tx_invocation.Script, false);
if (engine.Execute())
{
service.Commit();
}
ApplicationExecuted?.Invoke(this, new ApplicationExecutedEventArgs(tx_invocation, service.Notifications.ToArray(), engine));
}
break;
}
foreach (UInt160 hash in tx.Outputs.Select(p => p.ScriptHash).Distinct())
{
ContractState contract = contracts.TryGet(hash);
if (contract == null)
{
continue;
}
using (StateMachine service = new StateMachine(block, accounts, assets, contracts, storages))
{
ApplicationEngine engine = new ApplicationEngine(TriggerType.ApplicationR, tx, script_table, service, Fixed8.Zero);
engine.LoadScript(contract.Script, false);
using (ScriptBuilder sb = new ScriptBuilder())
{
sb.EmitPush(0);
sb.Emit(OpCode.PACK);
sb.EmitPush("received");
engine.LoadScript(sb.ToArray(), false);
}
if (engine.Execute())
{
service.Commit();
}
}
}
}
accounts.DeleteWhere((k, v) => !v.IsFrozen && v.Votes.Length == 0 && v.Balances.All(p => p.Value < Fixed8.Zero));
accounts.Commit();
Snapshot(block.Index, accounts);
unspentcoins.DeleteWhere((k, v) => v.Items.All(p => p.HasFlag(CoinState.Spent)));
unspentcoins.Commit();
spentcoins.DeleteWhere((k, v) => v.Items.Count == 0);
spentcoins.Commit();
validators.Commit();
assets.Commit();
contracts.Commit();
storages.Commit();
validators_count.Commit(batch);
batch.Put(SliceBuilder.Begin(DataEntryPrefix.SYS_CurrentBlock), SliceBuilder.Begin().Add(block.Hash).Add(block.Index));
db.Write(WriteOptions.Default, batch);
current_block_height = block.Index;
}
private void Persist(Block block)
{
WriteBatch batch = new WriteBatch();
DbCache <UInt160, AccountState> accounts = new DbCache <UInt160, AccountState>(db, DataEntryPrefix.ST_Account);
DbCache <UInt256, UnspentCoinState> unspentcoins = new DbCache <UInt256, UnspentCoinState>(db, DataEntryPrefix.ST_Coin);
DbCache <UInt256, SpentCoinState> spentcoins = new DbCache <UInt256, SpentCoinState>(db, DataEntryPrefix.ST_SpentCoin);
DbCache <ECPoint, ValidatorState> validators = new DbCache <ECPoint, ValidatorState>(db, DataEntryPrefix.ST_Validator);
DbCache <UInt256, AssetState> assets = new DbCache <UInt256, AssetState>(db, DataEntryPrefix.ST_Asset);
DbCache <UInt160, ContractState> contracts = new DbCache <UInt160, ContractState>(db, DataEntryPrefix.ST_Contract);
DbCache <StorageKey, StorageItem> storages = new DbCache <StorageKey, StorageItem>(db, DataEntryPrefix.ST_Storage);
List <NotifyEventArgs> notifications = new List <NotifyEventArgs>();
long amount_sysfee = GetSysFeeAmount(block.PrevHash) + (long)block.Transactions.Sum(p => p.SystemFee);
batch.Put(SliceBuilder.Begin(DataEntryPrefix.DATA_Block).Add(block.Hash), SliceBuilder.Begin().Add(amount_sysfee).Add(block.Trim()));
foreach (Transaction tx in block.Transactions)
{
batch.Put(SliceBuilder.Begin(DataEntryPrefix.DATA_Transaction).Add(tx.Hash), SliceBuilder.Begin().Add(block.Index).Add(tx.ToArray()));
unspentcoins.Add(tx.Hash, new UnspentCoinState
{
Items = Enumerable.Repeat(CoinState.Confirmed, tx.Outputs.Length).ToArray()
});
foreach (TransactionOutput output in tx.Outputs)
{
AccountState account = accounts.GetAndChange(output.ScriptHash, () => new AccountState(output.ScriptHash));
if (account.Balances.ContainsKey(output.AssetId))
{
account.Balances[output.AssetId] += output.Value;
}
else
{
account.Balances[output.AssetId] = output.Value;
}
}
foreach (var group in tx.Inputs.GroupBy(p => p.PrevHash))
{
int height;
Transaction tx_prev = GetTransaction(ReadOptions.Default, group.Key, out height);
foreach (CoinReference input in group)
{
unspentcoins.GetAndChange(input.PrevHash).Items[input.PrevIndex] |= CoinState.Spent;
if (tx_prev.Outputs[input.PrevIndex].AssetId.Equals(GoverningToken.Hash))
{
spentcoins.GetAndChange(input.PrevHash, () => new SpentCoinState
{
TransactionHash = input.PrevHash,
TransactionHeight = (uint)height,
Items = new Dictionary <ushort, uint>()
}).Items.Add(input.PrevIndex, block.Index);
}
accounts.GetAndChange(tx_prev.Outputs[input.PrevIndex].ScriptHash).Balances[tx_prev.Outputs[input.PrevIndex].AssetId] -= tx_prev.Outputs[input.PrevIndex].Value;
}
}
switch (tx.Type)
{
case TransactionType.RegisterTransaction:
{
#pragma warning disable CS0612
RegisterTransaction rtx = (RegisterTransaction)tx;
assets.Add(tx.Hash, new AssetState
{
AssetId = rtx.Hash,
AssetType = rtx.AssetType,
Name = rtx.Name,
Amount = rtx.Amount,
Available = Fixed8.Zero,
Precision = rtx.Precision,
Fee = Fixed8.Zero,
FeeAddress = new UInt160(),
Owner = rtx.Owner,
Admin = rtx.Admin,
Issuer = rtx.Admin,
Expiration = block.Index + 2 * 2000000,
IsFrozen = false
});
#pragma warning restore CS0612
}
break;
case TransactionType.IssueTransaction:
foreach (TransactionResult result in tx.GetTransactionResults().Where(p => p.Amount < Fixed8.Zero))
{
assets.GetAndChange(result.AssetId).Available -= result.Amount;
}
break;
case TransactionType.ClaimTransaction:
foreach (CoinReference input in ((ClaimTransaction)tx).Claims)
{
if (spentcoins.TryGet(input.PrevHash)?.Items.Remove(input.PrevIndex) == true)
{
spentcoins.GetAndChange(input.PrevHash);
}
}
break;
case TransactionType.EnrollmentTransaction:
{
#pragma warning disable CS0612
EnrollmentTransaction enroll_tx = (EnrollmentTransaction)tx;
validators.GetOrAdd(enroll_tx.PublicKey, () => new ValidatorState
{
PublicKey = enroll_tx.PublicKey
});
#pragma warning restore CS0612
}
break;
case TransactionType.PublishTransaction:
{
#pragma warning disable CS0612
PublishTransaction publish_tx = (PublishTransaction)tx;
contracts.GetOrAdd(publish_tx.ScriptHash, () => new ContractState
{
Script = publish_tx.Script,
ParameterList = publish_tx.ParameterList,
ReturnType = publish_tx.ReturnType,
ContractProperties = (ContractPropertyState)Convert.ToByte(publish_tx.NeedStorage),
Name = publish_tx.Name,
CodeVersion = publish_tx.CodeVersion,
Author = publish_tx.Author,
Email = publish_tx.Email,
Description = publish_tx.Description
});
#pragma warning restore CS0612
}
break;
case TransactionType.InvocationTransaction:
{
InvocationTransaction itx = (InvocationTransaction)tx;
CachedScriptTable script_table = new CachedScriptTable(contracts);
StateMachine service = new StateMachine(accounts, validators, assets, contracts, storages);
ApplicationEngine engine = new ApplicationEngine(TriggerType.Application, itx, script_table, service, itx.Gas);
engine.LoadScript(itx.Script, false);
if (engine.Execute())
{
service.Commit();
notifications.AddRange(service.Notifications);
}
}
break;
}
}
if (notifications.Count > 0)
{
OnNotify(block, notifications.ToArray());
}
accounts.DeleteWhere((k, v) => !v.IsFrozen && v.Votes.Length == 0 && v.Balances.All(p => p.Value <= Fixed8.Zero));
accounts.Commit(batch);
unspentcoins.DeleteWhere((k, v) => v.Items.All(p => p.HasFlag(CoinState.Spent)));
unspentcoins.Commit(batch);
spentcoins.DeleteWhere((k, v) => v.Items.Count == 0);
spentcoins.Commit(batch);
validators.Commit(batch);
assets.Commit(batch);
contracts.Commit(batch);
storages.Commit(batch);
batch.Put(SliceBuilder.Begin(DataEntryPrefix.SYS_CurrentBlock), SliceBuilder.Begin().Add(block.Hash).Add(block.Index));
db.Write(WriteOptions.Default, batch);
current_block_height = block.Index;
}