Example #1
0
 private void OnAddHeader(Header header, WriteBatch batch)
 {
     header_index.Add(header.Hash);
     while ((int)header.Index - 2000 >= stored_header_count)
     {
         using (MemoryStream ms = new MemoryStream())
             using (BinaryWriter w = new BinaryWriter(ms))
             {
                 w.Write(header_index.Skip((int)stored_header_count).Take(2000).ToArray());
                 w.Flush();
                 batch.Put(SliceBuilder.Begin(DataEntryPrefix.IX_HeaderHashList).Add(stored_header_count), ms.ToArray());
             }
         stored_header_count += 2000;
     }
     batch.Put(SliceBuilder.Begin(DataEntryPrefix.DATA_Block).Add(header.Hash), SliceBuilder.Begin().Add(0L).Add(header.ToArray()));
     batch.Put(SliceBuilder.Begin(DataEntryPrefix.SYS_CurrentHeader), SliceBuilder.Begin().Add(header.Hash).Add(header.Index));
 }
Example #2
0
        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;
                    }
                }
                List <ApplicationExecutionResult> execution_results = new List <ApplicationExecutionResult>();
                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();
                        }
                        execution_results.Add(new ApplicationExecutionResult
                        {
                            Trigger       = TriggerType.Application,
                            ScriptHash    = tx_invocation.Script.ToScriptHash(),
                            VMState       = engine.State,
                            GasConsumed   = engine.GasConsumed,
                            Stack         = engine.EvaluationStack.ToArray(),
                            Notifications = service.Notifications.ToArray()
                        });
                    }
                    break;
                }
                if (execution_results.Count > 0)
                {
                    ApplicationExecuted?.Invoke(this, new ApplicationExecutedEventArgs
                    {
                        Transaction      = tx,
                        ExecutionResults = execution_results.ToArray()
                    });
                }
            }
            accounts.DeleteWhere((k, v) => !v.IsFrozen && v.Votes.Length == 0 && v.Balances.All(p => p.Value <= Fixed8.Zero));
            accounts.Commit();
            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;
        }
Example #3
0
        public override bool ContainsTransaction(UInt256 hash)
        {
            Slice value;

            return(db.TryGet(ReadOptions.Default, SliceBuilder.Begin(DataEntryPrefix.DATA_Transaction).Add(hash), out value));
        }
Example #4
0
        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();
        }
Example #5
0
 public static void Delete(this WriteBatch batch, DataEntryPrefix prefix, ISerializable key)
 {
     batch.Delete(SliceBuilder.Begin(prefix).Add(key));
 }
Example #6
0
        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);
            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(SystemShare.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.Code.ScriptHash, () => new ContractState
                        {
                            Code        = publish_tx.Code,
                            HasStorage  = 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(itx, script_table, service, itx.Gas);
                    engine.LoadScript(itx.Script, false);
                    if (engine.Execute())
                    {
                        service.Commit();
                    }
                }
                break;
                }
            }
            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;
        }
Example #7
0
 public static void Put(this WriteBatch batch, DataEntryPrefix prefix, ISerializable key, ISerializable value)
 {
     batch.Put(SliceBuilder.Begin(prefix).Add(key), value.ToArray());
 }
Example #8
0
 public static T Get <T>(this DB db, ReadOptions options, DataEntryPrefix prefix, ISerializable key, Func <Slice, T> resultSelector)
 {
     return(resultSelector(db.Get(options, SliceBuilder.Begin(prefix).Add(key))));
 }
Example #9
0
 public static T Get <T>(this DB db, ReadOptions options, DataEntryPrefix prefix, ISerializable key) where T : class, ISerializable, new()
 {
     return(db.Get(options, SliceBuilder.Begin(prefix).Add(key)).ToArray().AsSerializable <T>());
 }
Example #10
0
 public static IEnumerable <T> Find <T>(this DB db, ReadOptions options, DataEntryPrefix prefix) where T : class, ISerializable, new()
 {
     return(Find(db, options, SliceBuilder.Begin(prefix), (k, v) => v.ToArray().AsSerializable <T>()));
 }
Example #11
0
 protected override IEnumerable <KeyValuePair <TKey, TValue> > FindInternal(byte[] key_prefix)
 {
     return(db.Find(ReadOptions.Default, SliceBuilder.Begin(prefix).Add(key_prefix), (k, v) => new KeyValuePair <TKey, TValue>(k.ToArray().AsSerializable <TKey>(), v.ToArray().AsSerializable <TValue>())));
 }