Libplanet changelog

Version 0.30.0

Released on March 24, 2022.

Backward-incompatible storage format changes

• (Libplanet.RocksDBStore) RocksDBStore became not to use column families to manage chain ids. Instead, chain id is concatenated into key prefix. [#1862]

CLI tools

• Added planet store migrate-index for index database migration (from column families based to key-prefix). [#1862]

Version 0.29.0

Released on March 17, 2022.

Backward-incompatible API changes

• (Libplanet.Net) SwarmOptions.MessageLifespan property changed to SwarmOptions.MessageTimestampBuffer. [#1828, #1831]
• (Libplanet.Net) Unused parameter dealerSocketLifetime removed from NetMQTransport(). [#1832]
• (Libplanet.Net) Old ITransport.SendMessageAsync() method is deprecated. ITransport.SendMessageWithReplyAsync() methods are renamed as ITransport.SendMessageAsync(). [#1849]

Behavioral changes

• (Libplanet.Net) Default value of SwarmOptions.MessageTimestampBuffer is set to 60 seconds instead of null. [#1828, #1831]
• (Libplanet.Net) Acceptable timestamp range for Messages, when non-null SwarmOptions.MessageTimestampBuffer is provided, has changed to allow Messages with future timestamps. [#1828, #1831]
• (Libplanet.Net) Swarm<T> now replies Pongs to received TxIds and BlockHeaderMessage messages. [#1845]

Version 0.28.2

Released on March 15, 2022.

• (Libplanet.RocksDBStore) RocksDBStore.GetBlockDigest() became to silently return null with no misleading error log when it's asked a non-existent block hash. [#1500, #1852]

Version 0.28.1

Released on March 3, 2022.

• Fixed an evaluation log to output IPreEvaluationBlock<T>.PreEvaluationHash as a hex formatted string. [#1835, #1837]
• (Libplanet.Net) Fixed a bug where some messages could not be sent using NetMQTransport due to premature DealerSocket disposal. [#1836, #1839]

Version 0.28.0

Released on February 23, 2022.

Deprecated APIs

Backward-incompatible API changes

• The return type of MerkleTrieExtensions.DifferentNodes() became IEnumerable<Tuple<KeyBytes, IValue, IValue>> from IEnumerable<IGrouping<string, (HashDigest<SHA256> Root, IValue Value)>>. [#1729]
• (Libplanet.Extensions.Cocona) Replaced string? passphrase = null parameter of methods belonging KeyCommand and ApvCommand with PassphraseParameters passphrase. [#1593, #1823]
• (Libplanet.Extensions.Cocona) Replaced KeyCommand.UnprotectKey(Guid keyId, string? passphrase = null) method with UnprotectedKey(Guid, PassphraseParameters, bool) method. [#1593, #1823]
• (Libplanet.Net) IMessageCodec<T>.Decode() now throws InvalidMessageSignatureException and InvalidMessageTimestampException instead of InvalidMessageException and InvalidTimestampException respectively. [#1771]
• (Libplanet.Net) Added long tipDeltaThreshold = 25L option to Swarm<T>.PreloadAsync() method. [#1775, #1777, #1779]

Backward-incompatible network protocol changes

• The Block<T>.CurrentProtocolVersion is bumped from 2 to 3. [#1322, #1323, #1518]

Backward-incompatible storage format changes

Added APIs

• (Libplanet.Extensions.Cocona) Added PassphraseParameters class. [#1593, #1823]
• (Libplanet.Extensions.Cocona) Added KeyCommand.UnprotectKey(Guid keyId, PassphraseParameters passphrase, bool ignoreStdin = false) method. [#1593, #1823]
• (Libplanet.Net) Added MessageSendFailedException class. [#1781, #1786]

Behavioral changes

• Block<T>.Transactions is ordered using a different scheme for evaluation due to protocol version bump. [#1322, #1323, #1518]
• (Libplanet.Net) NetMQTransport.SendMessageWithReplyAsync() should now complete its process within given timeframe timeout argument instead of possibly taking longer on some edge cases when waiting for multiple replies. [#1734, #1789]
• ActionEvaluator<T>.Evaluate() method became to log message directly instead of other methods that use it. [#1773]
• (Libplanet.Net) NetMQTransport.DoBroadcast now uses NetMQTransport.SendMessageAsync() internally instead of using NetMQ directly. [#1722, #1824]

Bug fixes

• (Libplanet.Net) Fixed a leak in handling DealerSockets inside NetMQTransport.DoBroadcast() method. [#1819, #1825]

Dependencies

• (Libplanet.Extensions.Cocona) Upgraded Cocona.Lite from 1.5.* to 1.6.*. [#1593, #1823]

CLI tools

• All planet subcommands taking passphrase now have --passphrase-file option besides -p/--passphrase option to read it from the specified file or standard input (-) instead. [#1593, #1823]
• Fixed a bug where planet subcommands taking passphrase had unexpectedly terminated with an uncaught InvalidOperationException when it's not associated to any terminal device (tty), i.e., piped. [#1593, #1823]
• planet mpt diff command became to output the key and its values in one line as JSON whenever a different key is found, than it outputs all of the different nodes at once. [#1729]

Version 0.27.7

Released on February 18, 2022.

• Fixed HashDigest<T>.DeriveFrom(ReadOnlySpan<byte>) method's bug where it had thrown IndexOutOfRangeException for the input longer or shorter than HashDigest<T>.Size on .NET Standard 2.0. [#1706, #1815]
• Fixed HashDigest<T>.DeriveFrom(ReadOnlySpan<byte>) method's bug where it had returned the wrong digest on .NET Standard 2.0. [#1706, #1815]

Version 0.27.6

Released on February 18, 2022.

• (Libplanet.Net) Fixed a bug where Swarm<T>.PreloadAsync() had not thrown OperationCanceledException even cancellation was requested. [#1547, #1796]
• Fixed ThreadStateException thrown by NonblockRenderer<T> and NonblockActionRenderer<T> classes. [#1772, #1810]

Version 0.27.5

Released on February 16, 2022.

• Upgraded Planetarium.RocksDbSharp from 6.2.4-planetarium to 6.2.6-planetarium. [#1791, #1803]
• (Libplanet.Net) Additional logs tagged Metric to monitor ITransport behavior. [#1802]

Version 0.27.4

Released on February 16, 2022.

• Fixed *@planetarium/cli* npm package's bug where installation had not worked since 0.27.0. [#1790, #1799]
• (Libplanet.Net) Return the fixed races between Swarm<T>'s dual systems for block synchronization (polling and event-driven in parallel) on updating chain by serializing the post-download process which is common for both synchronization mechanisms. [#1731, #1798]

Version 0.27.3

Released on February 11, 2022.

• (Libplanet.Net) Swarm<T>.CompleteBlockSync() changed back, reverting the behavior implemented in #1759 to fixed races between Swarm<T>'s dual systems for block synchronization (polling and event-driven in parallel) on updating chain [#1797]

Version 0.27.2

Released on February 8, 2022.

• (Libplanet.Net) Sending a Message through NetMQTransport now fails immediately if the Message cannot be queued to a DealerSocket right away. [#1753, #1778]

Version 0.27.1

Released on February 7, 2022.

• (Libplanet.Net) Swarm<T>.PreloadAsync() method became to catch up recent blocks until the local tip is close enough to the topmost tip among peers. [#1775, #1777]

Version 0.27.0

Released on January 26, 2022.

Deprecated APIs

• Added EnumerableMeasurement static class. [#1764, #1766]

Backward-incompatible API changes

• Moved everything in Libplanet.Net namespace from Libplanet assembly to Libplanet.Net assembly. [#1421, #1760]
• (Libplanet.Net) Parameters of NetMQTransport() constructor has modified. [#1741, #1744]
  • Removed RoutingTable table and int minimumBroadcastTarget parameters.
  • Added TimeSpan? dealerSocketLifetime parameter.
• (Libplanet.Net) Removed RoutingTable table and int minimumBroadcastTarget parameters from TcpTransport() constructor. [#1741, #1744]
• (Libplanet.Net) Removed ITransport.BroadcastMessage(Address?, Message) method. Instead, added ITransport.BroadcastMessage(IEnumerable<BoundPeer>, Message) method. [#1741, #1744]

Added APIs

• Added TrieStateStore.CopyStates() method. [#1653, #1691]
• Added NullBlockPolicy<T> class. [#1531, #1748]
• (Libplanet.Net) Added classes which implements Message abstract class. [#1754, #1756]
  • Added Ping class.
  • Added Pong class.
  • Added FindNeighbors class.
  • Added Neighbors class.
  • Added DifferentVersion class.

Behavioral changes

• MerkleTrie.Get() method now finds multiple states in parallel. [#1743]
• (Libplanet.Net) DealerSockets used for broadcasting messages in NetMQTransport became not to be disposed right after corresponding peer is removed from the routing table. Instead, it will be removed after a certain amount of time. [#1741, #1744]
• (Libplanet.Net) NetMQTransport no longer attempts to retry failed communications. [#1751, #1752]
• (Libplanet.Net) Fixed races between Swarm<T>'s dual systems for block synchronization (polling and event-driven in parallel) on updating chain by serializing the post-download process which is common for both synchronization mechanisms. [#1731, #1759]
• New log output tagged with Metric added to measure evaluation time for individual Transaction<T>s. [#1755, #1758]

Dependencies

• Libplanet.Net assembly is now distributed as a seaprate NuGet package: Libplanet.Net. [#1421, #1760]

CLI tools

• Upgrade node-fetch for *@planetarium/cli* npm package. [CVE-2022-0235, #1747]

Version 0.26.6

Released on February 18, 2022.

• Fixed HashDigest<T>.DeriveFrom(ReadOnlySpan<byte>) method's bug where it had thrown IndexOutOfRangeException for the input longer or shorter than HashDigest<T>.Size on .NET Standard 2.0. [#1706, #1815]
• Fixed HashDigest<T>.DeriveFrom(ReadOnlySpan<byte>) method's bug where it had returned the wrong digest on .NET Standard 2.0. [#1706, #1815]

Version 0.26.5

Released on February 18, 2022.

• Fixed a bug where Swarm<T>.PreloadAsync() had not thrown OperationCanceledException even cancellation was requested. [#1547, #1796]
• Fixed ThreadStateException thrown by NonblockRenderer<T> and NonblockActionRenderer<T> classes. [#1772, #1810]

Version 0.26.4

Released on February 16, 2022.

• Upgraded Planetarium.RocksDbSharp from 6.2.4-planetarium to 6.2.6-planetarium. [#1791, #1803]
• Additional logs tagged Metric to monitor ITransport behavior. [#1802]

Version 0.26.3

Released on February 7, 2022.

• Swarm<T>.PreloadAsync() method became to catch up recent blocks until the local tip is close enough to the topmost tip among peers. [#1775]

Version 0.26.2

Released on January 26, 2022.

• Fixed a bug where ActionEvaluator<T>'s logs had been ignored due to its initialization timings. [#1764]
• The elapsed time taking for ordering Transaction<T>s before evaluating them are now measured and logged. [#1764]
• The time started and finished to calculate state root hashes are now logged. [#1764]

Version 0.26.1

Released on January 20, 2022.

• General logging overhaul in NetMQTransport<T> for consistency and readability. [#1735]

Version 0.26.0

Released on January 18, 2022.

Backward-incompatible API changes

• Replaced IValue StateCompleter<T>(BlockChain<T>, BlockHash, Address) delegate with IReadOnlyList<IValue?> StateCompleter<T>(BlockChain<T>, BlockHash, IReadOnlyList<Address>) delegate. [#1703]
• Added IAccountStateDelta.GetStates(IReadOnlyList<Address>) method. [#1703]
• Replaced IValue AccountStateGetter(Address) delegate with IReadOnlyList<IValue?> AccountStateGetter(IReadOnlyList<Address>) delegate. [#1703]
• Removed StateGetter<T> delegate. [#1703]
• Removed BalanceGetter<T> delegate. [#1703]
• Removed StateGetter<T> stateGetter and BalanceGetter<T> balanceGetter parameters from ActionEvaluator<T>() constructor. [#1703]
• Added IBlockChainStates<T> blockChainStates parameter to ActionEvaluator<T>() constructor. [#1703]
• Replaced ITrie.TryGet() with ITrie.Get() method. [#1703]
• Replaced StateStoreExtensions.GetState() static method with GetStates() static method. [#1703]
• nullable context enabled for IProtocol interface and Kademlia, KademliaProtocol, and RoutingTable classes. [#1692]
• RoutingTable.Neighbors(Peer, int, bool) changed to RoutingTable.Neighbors(BoundPeer, int, bool). As a result, RoutingTable class now only explicitly deals with BoundPeers. [#1692]
• BlockChain<T>.StageTransaction(), IStagePolicy.Stage(), and IStagePolicy.Unstage() now all return bool to indicate whether staging was successful or not. [#1710]

Added APIs

• Added BlockChain<T>.GetStates() method. [#1703]
• Added IBlockChainStates<T> interface. [#1703]
  • BlockChain<T> now implements IBlockChainStates<T>.
• Added StateStoreExtensions.GetStates() static method. [#1703]

Behavioral changes

• Improved performance of Swarm<T>.FillBlocksAsync()'s block sync. [#1663, #1699]
  • The way Swarm<T> synchronizes the attached BlockChain<T> with peers became more performant by splitting downloading and appending blocks into two parallel tasks.

Bug fixes

• Fixed a bug where unnecessary additional attempts were made to unresponsive Peers when discovering a Peer through KademliaProtocol. [#1692]

Version 0.25.5

Released on February 18, 2022.

• Fixed HashDigest<T>.DeriveFrom(ReadOnlySpan<byte>) method's bug where it had thrown IndexOutOfRangeException for the input longer or shorter than HashDigest<T>.Size on .NET Standard 2.0. [#1706, #1815]
• Fixed HashDigest<T>.DeriveFrom(ReadOnlySpan<byte>) method's bug where it had returned the wrong digest on .NET Standard 2.0. [#1706, #1815]

Version 0.25.4

Released on January 18, 2022.

• Some additional logging to track down issues with staging Transaction<T>s. [#1718]
• (Libplanet.RocksDBStore) Fixed RocksDBStore's inaccurate lock handling. [#1719]

Version 0.25.3

Released on January 14, 2022.

• Fixed a bug when message broadcasting on Swarm<T> had been stopped suddenly. [#1715]

Version 0.25.2

Released on January 11, 2022.

• Fixed a bug where TxCompletion<TPeer, TAction> failed to fetch transactions from other peers. [#1704]
• In TxCompletion<TPeer, TAction>, instead of maintaining single RequestTxsFromPeerAsync() task for each peer, a new RequestTxsFromPeerAsync() task is spawned every time a new demand is received. [#1704]

Version 0.25.1

Released on January 6, 2022.

Behavioral changes

• Swarm<T> changed back, reverting the behavior implemented in #1606 to append blocks to the canonical chain instead of using a forked chain while syncing recent blocks. [#1693]

Version 0.25.0

Released on January 5, 2022.

Backward-incompatible API changes

• Replaced HashDigest<T>(ImmutableArray<byte>) constructor with HashDigest<T>(in ImmutableArray<byte>) constructor. [#1678]
• IKeyValueStore's key type became KeyBytes (was byte[]). [#1678]
  • Replaced IKeyValueStore.Get(byte[]) method with Get(in KeyBytes) method.
  • Replaced IKeyValueStore.Set(byte[], byte[]) method with Set(in KeyBytes, byte[]) method.
  • Replaced IKeyValueStore.Set(IDictionary<byte[], byte[]>) method with Set(IDictionary<KeyBytes, byte[]>) method.
  • Replaced IKeyValueStore.Delete(byte[]) method with Delete(in KeyBytes) method.
  • Replaced IKeyValueStore.Exists(byte[]) method with Exists(in KeyBytes) method.
  • IKeyValueStore.ListKeys() method's return type became IEnumerable<KeyBytes> (was IEnumerable<byte[]>).
• ITrie's key type became KeyBytes (was byte[]). [#1689]
  • Replaced ITrie.Set(byte[], IValue) method with Set(in KeyBytes, IValue) method.
  • Replaced ITrie.TryGet(byte[], out IValue?) method with TryGet(in KeyBytes, out IValue?) method.
  • The return type of MerkleTrieExtensions.ListAllStates() static method became IEnumerable<KeyValuePair<KeyBytes, IValue>> (was IEnumerable<KeyValuePair<ImmutableArray<byte>, IValue>>). [#1653]
• Added IKeyValueStore.Get(IEnumerable<KeyBytes>) method. [#1678]
• Added IKeyValueStore.Delete(IEnumerable<KeyBytes>) method. [#1678]
• nullable context enabled for Peer and BoundPeer classes. All public constructors now explicitly take non-nullable parameters. [#1679]
  • All publicly accessibe properties of Peer and BoundPeer are now non-nullable except for Peer.PublicIPAddress.
• Replaced HashDigest<T>.DeriveFrom(ReadOnlySpan<byte>) overloaded static method with other new overloads. [#1680]

Backward-incompatible network protocol changes

• Removed Sender property from Messages.TxIds and Messages.TxIds's MessageType value bumped to 0x31. [#1681]

Added APIs

• Added KeyBytes readonly struct. [#1678]
• Added HashDigest<T>(in ImmutableArray<byte>) constructor. [#1678]
• Added HashDigest<T>.DeriveFrom(byte[]) overloaded static method. [#1680]
• Added HashDigest<T>.DeriveFrom(ImmutableArray<byte>) overloaded static method. [#1680]
• Added HashDigest<T>.DeriveFrom(ReadOnlySpan<byte>) overloaded static method. [#1680]
• Added StateStoreExtensions.EncodeKey() static method. [#1689]
• Added StateStoreExtensions.DecodeKey() static method. [#1689]

Behavioral changes

• Improved performance of Swarm<T>'s block propagation. [#1676]
• (Libplanet.RocksDBStore) Improved performance of RocksDBStore<T>.IterateIndexes() method. [#1676]

Version 0.24.2

Released on December 24, 2021.

• Fixed a bug of NonblockRenderer<T> and NonblockActionRenderer<T> where they had thrown ThreadStateException when any render events occured after disposed. [#1682]
• Log output compacted by removing duplicate exception messages. [#1632, #1677]

Version 0.24.1

Released on December 16, 2021.

• Fixed a bug where Transaction<T>s were unstaged when they were not supposed to. [#1672]

Version 0.24.0

Released on December 16, 2021.

Backward-incompatible API changes

• IStagePolicy<T>'s interface methods updated. Notably, all IStagePolicy<T> now accept BlockChain<T> as its parameter. [#1648]
  • Get(BlockChain<T> blockChain, TxId id, bool includeInstaged) changed to Get(BlockChain<T> blockChain, TxId id, bool filtered = true).
  • Iterate() changed to Iterate(BlockChain<T> blockChain, bool filtered = true).
  • GetNextTxNonce(Address address, long minedTxs) changed to GetNextTxNonce(BlockChain<T> blockChain, Address address).

Behavioral changes

• Description of IStagePolicy<T> and its default implementation VolatileStagePolicy<T> is overhauled. [#1648]
  • IStagePolicy<T>.Iterate() no longer guarantees any kind of ordering.
  • IStagePolicy<T>.Ignore() now also unstages the Transaction<T>.
  • VolatileStagePolicy<T> now holds every previously known unconfirmed Transaction<T> regardless of its staging/unstaging history unless it is expired or ignored.
• New log output tagged with Metric added to measure execution time for BlockChain<T>.FindNextHashes(). [#1669]

Bug fixes

• Fixed a bug where TxCompletion had broadcasted invalid transactions. [#1661]

Version 0.23.4

Released on December 24, 2021.

• Fixed a bug of NonblockRenderer<T> and NonblockActionRenderer<T> where they had thrown ThreadStateException when any render events occured after disposed. [#1682]

Version 0.23.3

Released on December 13, 2021.

• Virtually disabled state fragmentation due to its critical negative impact on action evaluation performance. This will be enabled again after more practical tests in the future releases. [#1665]

Version 0.23.2

Released on December 13, 2021.

• Removed unnecessary a reader lock on BlockChain<T>.GetState() method to improve parallelism. [#1657]
• Improved performance of Swarm<T>'s block synchronization. [#1657]
• Fixed a bug where Swarm<T> had swapped to improper chain. [#1657]
• (Libplanet.RocksDBStore) Fixed a bug where RocksDBStore.ForkBlockIndexes() had created temporary chains unnecessarily. [#1657]

Version 0.23.1

Released on December 10, 2021.

• Fixed TrieStateStore.PruneStates() method's bug that it had thrown ArgumentOutOfRangeException. [#1653, #1654]

Version 0.23.0

Released on December 8, 2021.

From this version Libplanrt can be built on arm64 machines including Apple Silicon (aarch64-apple-darwin).

Added APIs

• Added PreEvaluationBlock<T>.DetermineStateRootHash(BlockChain<T>, StateCompleterSet<T>, out IImmutableDictionary<string, IValue>) overloaded method. [#1636]
• Added PreEvaluationBlock<T>.DetermineStateRootHash(IAction?, IStateStore, out IImmutableDictionary<string, IValue>) overloaded method. [#1636]
• Parameter except for KBucket.GetRandomPeer() now defaults to null. [#1631]
• Added ArrayEqualityComparer<T> class. [#1636]

Behavioral changes

• States became to take up much less space than before by reducing unnecessary duplicate data. Although this guarantees the backward compatibility with the existing state store, in order to take complete effect of this optimization, please replay your existing blockchain from the genesis block with the empty store. [#1636]
• (Libplanet.Analyzers) Rule LAA1002 no more warns about enumerating sorted sets/dictionaries:
  • System.Collections.Generic.SortedDictionary<TKey, TValue>
  • System.Collections.Generic.SortedSet<T>
  • System.Collections.Immutable.ImmutableSortedDictionary<TKey, TValue>
  • System.Collections.Immutable.ImmutableSortedSet<T>
  • Bencodex.Types.Dictionary (which became to guarantee enumeration order since Bencodex 0.4.0)

Bug fixes

• KBucket.Head and KBucket.Tail now properly return null if the bucket is empty instead of faulting. [#1631]
• TxCompletion.Demand() no longer requests Transaction<T>s already in storage. [#1649]

Dependencies

• Upgraded Bencodex from 0.4.0-dev.20211123080042+d7f6c810 to 0.4.0. [#1636]
• Upgraded Planetarium.RocksDbSharp from 6.2.3 to 6.2.4-planetarium. [#1635]

Version 0.22.1

Released on December 5, 2021.

• Compacted log output for convenience. [#1633]
• Removed ITransport.MessageHistory property due to memory leak. [#1639]

Version 0.22.0

Released on November 30, 2021.

Backward-incompatible API changes

• Removed Transaction<T>.BytesLength property. [#1609]
• Removed Block<T>.BytesLength property. [#1609]
• The types of BlockChain<T>.MineBlock() overloaded methods' maxBlockBytes parameters became long? (were int?). [#1609]
• The type of IBlockPolicy<T>.GetMaxBlockBytes(long) method became long (was int). [#1609]
• The type of BlockPolicy<T>() constructor's getMaxBlockBytes parameter became Func<long, long>? (was Func<long, int>?). [#1609]
• The type of InvalidBlockBytesLengthException() constructor's bytesLength parameter became long (was int). [#1609]
• The type of InvalidBlockBytesLengthException.BytesLength property became long (was int). [#1609]
• Methods IsEmpty() and IsFull() of KBucket changed to properties IsEmpty and IsFull respectively. [#1610]
• MessageCodec class renamed to TcpMessageCodec. [#1610]
• lifetime parameter removed from IMessageCodec.Decode(). messageLifespan parameter added to constructors of NetMQMessageCodec and TcpMessageCodec. [#1610]
• Removed unused PeerStates property from Swarm<T>. [#1610]
• Method name BoundPeer.QueryAppProtocolVersion() changed to BoundPeer.QueryAppProtocolVersionNetMQ(). [#1610]

Behavioral changes

• Swarm<T> became to append blocks to forked chain to avoid locking the canonical chain while syncing recent blocks. [#1606]
• More streamlined structured logging together with additional logs tagged as Metric. [#1627]

Bug fixes

• InvalidMagicCookieException and InvalidTimestampException can now be serialized and deserialized. [#1613]
• Fixed a bug where PolymorphicAction<T> had thrown InvalidCastException when inner action's .PlainValue returns other value than Bencodex.Types.Dictionary. [#1628]

Dependencies

• Libplanet.Stun assembly is now distributed as a seaprate NuGet package: Libplanet.Stun. [#813, #1279, #1625]
• Upgraded Bencodex from 0.3.0 to 0.4.0-dev.20211123080042+d7f6c810. [#1609]
• Now depends on Caching.dll 1.4.0.1.

Version 0.21.2

Released on November 25, 2021.

• planet apv query command became to communicate with NetMQTransport instead of TcpTransport. [#1618]

Version 0.21.1

Released on November 25, 2021.

• SwarmOptions.TipLifespan property' default value was changed. The default lifespan for a tip going stale is now 60 seconds instead of 30 seconds for the purpose of polling blocks. [#1614]
• Swarm<T>'s internal logic for determining when the BlockChain<T>.Tip becomes stale is now fixed. [#1614]

Version 0.21.0

Released on November 16, 2021.

Backward-incompatible API changes

• (Libplanet.RocksDBStore) Removed MonoRocksDBStore class. [#1513, #1579]
• Removed rehearsal parameter from ITrie.Commit() method. [#1554, #1570]
• Removed rehearsal parameter from StateStoreExtensions.Commit() extension method. [#1554, #1570]
• Removed ITransport.RunAsync() method. ITransport.StartAsync() now conducts operation that ITransport.RunAsync() used to conduct. [#1523]
• Removed ITransport.ReplyMessage() method which was non-blocking. Instead, added ITransport.ReplyMessageAsync() asynchronous method which is awaited until the reply message is sent. [#1523]
• The type of ITransport.ProcessMessageHandler became AsyncDelegate<T> (which was EventHandler). [#1523]
• Removed unused BlockChain<T> type parameter from IStagePolicy<T>.Iterate() method. [#1553, #1556]
• Removed unsued HashAlgorithmTable class. [#1600]
• BlockChain<T>.MineBlock() and BlockChain<T>.GatherTransactionsToMine() now additionally accepts maxBlockBytes parameter of type int. [#1600]
• Removed BlockInsufficientTxsException and BlockExceedingTransactionsException classes. [#1504, #1600]

Added APIs

• Added ITransport.MessageHistory property. [#1523]
• Added ITransport.WaitForRunning() method. [#1523]
• Added TcpTransport class which implements ITransport interface. [#1523]
• Added SwarmOptions.Type property. [#1523]
• Added SwarmOptions.TransportType enum. [#1523]
• Added AsyncDelegate<T> class. [#1523]
• Added InvalidMagicCookieException class. [#1523]
• Added MessageCodec class which inherits IMessageCodec<T>. [#1523]
• Added IStagePolicy<T>.GetNextTxNonce() method. [#1553, #1556]
• Added InvalidBlockBytesLengthException, InvalidBlockTxCountException, InvalidBlockHashAlgorithmTypeException, and InvalidBlockTxCountPerSignerException classes. [#1504, #1600]

Behavioral changes

• Improved performance of MerkleTrie.Commit() and BlockChain<T>.ExecuteActions() methods. [#1554, #1570]
• Swarm<T>.MineBlock() now throws OperationCanceledException instead of BlockInsufficientTxsException when there are no sufficient number of blocks to mine. [#1600]
• Default implementation BlockPolicy<T>.ValidateNextBlock() of IBlockPolicy<T> now validates the type for Block<T>.HashAlgorithm, size for Block<T>.BytesLength, and count for Block<T>.Transactions. [#1504, #1600]

CLI tools

• planet stats command's -p/--path option no more supports the store type monorocksdb. [#1513, #1579]
• Subcommands under planet store no more supports the store type monorocksdb. [#1513, #1579]

Version 0.20.2

Released on November 9, 2021.

• (Libplnaet.RocksDBStore) Fixed DefaultStore.ForkBlockIndexes() method's bug that it had been thrown ChainIdNotFoundException when received a chain forked from already deleted. [#1591, #1592]
• Fixed improper implementations of BlockExceedingTransactionsException InvalidBlockBytesLengthException in regards to serialization and related tests. [#1594]

Version 0.20.1

Released on November 8, 2021.

• Swarm<T> became to broadcast a new block to peers immediately after Swarm<T>.BlockChain's Tip changes while it is Running. [#1582, #1586]

Version 0.20.0

Released on November 3, 2021.

Deprecated APIs

• (Libplanet.RocksDBStore) MonoRocksDBStore will be gone in the next minor release: 0.21.0. [#1513, #1574]

Backward-incompatible API changes

• Removed unused BlockChain<T> type parameter from IStagePolicy<T>.Iterate() method. [#1553, #1556]

Added APIs

• Added IStagePolicy<T>.GetNextTxNonce() method. [#1553, #1556]

Version 0.19.3

Released on November 8, 2021.

• Swarm<T> became to broadcast a new block to peers immediately after Swarm<T>.BlockChain's Tip changes while it is Running. [#1582]

Version 0.19.2

Released on November 3, 2021.

• PrivateKey(IReadOnlyList<byte>) overloaded constructor no more accepts a list shorter or longer than 32 bytes. [#1571, #1572]
• PrivateKey.FromString() method no more accept a hexadecimal digits shorter or longer than 64 characters. [#1571, #1572]
• Fixed a bug where HashAlgorithmType.Digest(byte[]) and HashAlgorithmType.Digest(ImmutableArray<byte>) methods had returned a wrong hash digest after HashAlgorithmType.Digest(IEnumerable<byte[]>) or HashAlgorithmType.Digest(IEnumerable<ImmutableArray<byte>>) methods had been once called. [#1575, #1576]

Version 0.19.1

Released on October 29, 2021.

• BlockMetadata.MineNonce() method and other mining methods based on it now do not spawn a new thread if the workers is less than 2. [#1564]
• BlockMetadata.MineNonce() method and other mining methods based on it now uses the half of the present logical processors (i.e., Environment.ProcessorCount / 2) by default. If there is only one logical processor, uses one worker. [#1564]
• Rolled back the order of the header of a Message so that it is compatible with nodes based on Libplanet pre-0.19.0. [#1565]

Version 0.19.0

Released on October 27, 2021.

Backward-incompatible API changes

• Removed IStore.StageTransactionIds() method. [#1166, #1535]
• Removed IStore.UnstageTransactionIds() method. [#1166, #1535]
• Removed IStore.IterateStagedTransactionIds() method. [#1166, #1535]
• Removed Message.ToNetMQMessage() method. Use IMessageCodec<T>.Encode() method instead. [#1503]
• Removed Message.Parse() static method. Use IMessageCodec<T>.Decode() method instead. [#1503]
• Removed unused HashAlgorithmGetter type parameter from ActionEvaluator<T>() constructor. [#1537]
• Hashcash.Answer() method became to take random seed value explicitly. [#1546]

Backward-incompatible network protocol changes

• The order of the header of a Message has been modified. [#1503]

Added APIs

• Added BlockMetadata.MineNonce(HashAlgorithmType, int, CancellationToken) overloaded method. [#1546]
• Added Message.MessageFrame enum. [#1503]
• Added Message.Type property. [#1503]
• Added Message.DataFrames property. [#1503]
• Added IMessageCodec<T> interface. [#1503]
• Added NetMQMessageCodec class which inherits IMessageCodec<T>. [#1503]
• Added MemoryStore class. [#1544]
• Added MemoryKeyValueStore class. [#1544]
• Added BlockDemandTable.Remove() method. [#1549]
• Added BlockMetadata.MineNonce(HashAlgorithmType, int, CancellationToken) overloaded method. [#1546]
• Added SwarmOptions.TipLifespan property. [#1557]

Behavioral changes

• BlockMetadata.MineNonce() method became to use multithreading when looking for the nonce. [#1546]
• IStore.ForkTxNonces() method became to throw ChainIdNotFoundException when a given sourceChainId does not exist. [#1544]
• Swarm<T>.StartAsync() method became to poll neighbor peers if they have any new blocks whether Swarm<T>.BlockDemandTable is empty or not. The polling is triggered when Swarm<T>.BlockChain's Tip has been unchanged for a while. Expiration time for tips can be configured through SwarmOptions.TipLifespan property. [#1557]

Bug fixes

• Fixed DefaultStore.ForkBlockIndexes() method's bug that it had done silently no-op when a given sourceChainId had not existed, which had not been compliant with IStore.ForkBlockIndexes() method's specification. [#1544]
• Fixed Swarm<T>'s bug that it had thrown PingTimeoutException if any peer in configured SwarmOptions.StaticPeers is unreachable. [#1550, #1551]
• (Libplanet.RocksDBStore) Fixed RocksDBStore.ForkBlockIndexes() method's bug that it had done silently no-op when a given sourceChainId had not existed, which had not been compliant with IStore.ForkBlockIndexes() method's specification. [#1544]
• (Libplanet.RocksDBStore) Fixed MonoRocksDBStore.ForkBlockIndexes() method's bug that it had done silently no-op when a given sourceChainId had not existed, which had not been compliant with IStore.ForkBlockIndexes() method's specification. [#1544]
• Fixed a bug where Swarm<T> did not removed failed block demands from the BlockDemandTable. [#1549]

Version 0.18.5

Released on November 3, 2021.

• Fixed a bug where HashAlgorithmType.Digest(byte[]) and HashAlgorithmType.Digest(ImmutableArray<byte>) methods had returned a wrong hash digest after HashAlgorithmType.Digest(IEnumerable<byte[]>) or HashAlgorithmType.Digest(IEnumerable<ImmutableArray<byte>>) methods had been once called. [#1575]

Version 0.18.4

Released on November 2, 2021.

• PrivateKey(IReadOnlyList<byte>) overloaded constructor no more accepts a list shorter or longer than 32 bytes. [#1571]
• PrivateKey.FromString() method no more accept a hexadecimal digits shorter or longer than 64 characters. [#1571]

Version 0.18.3

Released on October 28, 2021. Mainly backported critical bug fixes from 0.19.0. [#1562]

• Swarm<T>.StartAsync() method became to poll neighbor peers if they have any new blocks whether Swarm<T>.BlockDemandTable is empty or not. The polling is triggered when Swarm<T>.BlockChain's Tip has been unchanged for a while. [#1557]
• Fixed Swarm<T>'s bug that it had thrown PingTimeoutException if any peer in configured SwarmOptions.StaticPeers is unreachable. [#1550, #1551]
• Fixed a bug where Swarm<T> did not removed failed block demands from the BlockDemandTable. [#1549]

Version 0.18.2

Released on October 22, 2021.

• Fixed a bug that Swarm<T> had not responded to GetBlocks requests when some of requested blocks fail to be loaded. It now sends a Blocks response with successfully loaded blocks for the same situation. [#1540]

Version 0.18.1

Released on October 21, 2021.

• Fixed a bug where PublicKey.Verify() method had thrown exceptions for some invalid inputs. [#1520]
• BaseStore.GetBlock<T>() method now throws InvalidOperationException when it fails to load a requested block's transactions. [#1500, #1532]
• (Libplanet.RocksDBStore) Operations on RocksDBStore that update data no longer suppress the internal failures. [#1500, #1532]

Version 0.18.0

Released on October 13, 2021.

Backward-incompatible API changes

• Hashcash.Stamp(Nonce) delegate's return type became IEnumerable<byte[]> (was byte[]). [#1492]
• Moved BlockDigest struct to Libplanet.Store namespace (from Libplanet.Blocks namespace). [#1492]
• Removed Block<T>.ToBlockDigest() method. Use BlockDigest.FromBlock<T>() static method instead. [#1492]
• ActionEvaluator<T>.Evaluate() method's block parameter became to take IPreEvaluationBlock<T> (was IBlock<T>). [#1146, #1164, #1492]
• Block<T> and BlockHeader now guarantees that their every instance has integrity. [#1164, #1492]
  • Block<T> became unable to be subclassed.
  • Remove Block<T>(long, long, BigInteger, Nonce, Address, BlockHash?, DateTimeOffset, IReadOnlyList<Transaction<T>>, HashAlgorithmType, HashDigest<SHA256>, ImmutableArray<byte>?, int) overloaded constructor. Use other overloaded constructors instead.
  • Added Block<T>(IBlockHeader header, IEnumerable<Transaction<T>>) overloaded constructor.
  • Added Block<T>(PreEvaluationBlock<T>, HashDigest<SHA256>, ImmutableArray<byte>?) overloaded constructor. [#1457, #1507]
  • BlockHeader is no more readonly struct, but a sealed class.
  • Removed BlockHeader(int, long, string, ImmutableArray<byte>, ImmutableArray<byte>, long, BigInteger, ImmutableArray<byte>, ImmutableArray<byte>, ImmutableArray<byte>, ImmutableArray<byte>, ImmutableArray<byte>) constructor. Use other overloaded constructors instead.
  • Added BlockHeader(PreEvaluationBlockHeader, HashDigest<SHA256>, ImmutableArray<byte>?) overloaded constructor. [#1457, #1507]
  • Added BlockHeader(PreEvaluationBlockHeader, HashDigest<SHA256>, ImmutableArray<byte>?, BlockHash) overloaded constructor. [#1457, #1507]
• Block<T> and BlockHeader have no more marshaling/unmarshaling methods.
  • Removed Block<T>(Bencodex.Types.Dictionary) overloaded constructor. Use BlockMarshaler.UnmarshalBlock() static method instead.
  • Removed Block<T>.Deserialize() static method. Instead, use BlockMarshaler.UnmarshalBlock() static method and Bencodex.Codec together.
  • Removed Block<T>.ToBencodex() method. Use BlockMarshaler.MarshalBlock() static method instead.
  • Removed Block<T>.Serialize() method. Instead, use BlockMarshaler.MarshalBlock() static method and Bencodex.Codec together.
  • Removed BlockHeader(Bencodex.Types.Dictionary) overloaded constructor. Use BlockMarshaler.UnmarshalBlockHeader() static method instead.
  • Removed BlockHeader.Deserialize() static method. Instead, use BlockMarshaler.UnmarshalBlockHeader() static method and Bencodex.Codec together.
  • Removed BlockHeader.ToBencodex() method. Use BlockMarshaler.MarshalBlockHeader() static method instead.
  • Removed BlockHeader.Serialize() method. Instead, use BlockMarshaler.MarshalBlockHeader() static method and Bencodex.Codec together.
• Block<T> and BlockHeader now guarantee that their every instance has its StateRootHash. [#1128, #1146, #1492]
  • Block<T>.StateRootHash property's type became HashDigest<SHA256> (was HashDigest<SHA256>?).
  • Removed Block<T>(Block<T>, HashDigest<SHA256>) overloaded constructor. Use Block<T>(PreEvaluationBlock<T>, HashDigest<SHA256>) overloaded constructor instead.
  • Removed Block<T>.Mine() static method. Use BlockContent<T>.Mine() and PreEvaluationBlock<T>.Evaluate() methods instead.
  • BlockHeader.StateRootHash property's type became HashDigest<SHA256> (was HashDigest<SHA256>?).
  • The type of InvalidBlockStateRootHashException() constructor's expectedStateRootHash parameter became HashDigest<SHA256> (was HashDigest<SHA256>?). [#1507]
  • InvalidBlockStateRootHashException.ExpectedStateRootHash property's type became HashDigest<SHA256> (was HashDigest<SHA256>?). [#1507]
• Block<T> and BlockHeader became aware of HashAlgorithmType used for proof-of-work mining. [#1492]
  • Added Block<T>.HashAlgorithm property.
  • Added BlockHeader.HashAlgorithm property.
  • Removed BlockHeader(int, long, DateTimeOffset, Nonce, Address, long, BigInteger, BlockHash?, HashDigest<SHA256>?, BlockHash, ImmutableArray<byte>, HashDigest<SHA256>?) constructor. Use BlockHeader(int, long, DateTimeOffset, Nonce, Address, long, BigInteger, BlockHash?, HashDigest<SHA256>?, BlockHash, ImmutableArray<byte>, HashDigest<SHA256>, HashAlgorithmType) constructor instead.
  • Added HashAlgorithmGetter hashAlgorithmGetter parameter to IStore.GetBlock<T>() method.
  • Removed BlockDigest.Header property. Use BlockDigest.GetHeader() method instead.
  • Added BlockDigest.GetHeader() method.
  • Added HashAlgorithmGetter hashAlgorithmGetter parameter to DelayedRenderer<T>() constructor.
  • Added HashAlgorithmGetter hashAlgorithmGetter parameter to DelayedActionRenderer<T>() constructor.
  • Added DelayedRenderer<T>.HashAlgorithmGetter property.
• Blocks became signed by the miner since the protocol version 2. [#1457, #1507]
  • Added Block<T>(PreEvaluationBlock<T>, HashDigest<SHA256>, ImmutableArray<byte>?) overloaded constructor. [#1164, #1492]
  • Added BlockHeader(PreEvaluationBlockHeader, HashDigest<SHA256>, ImmutableArray<byte>?) overloaded constructor. [#1164, #1492]
  • Added BlockHeader(PreEvaluationBlockHeader, HashDigest<SHA256>, ImmutableArray<byte>?, BlockHash) overloaded constructor. [#1164, #1492]
  • Added Block<T>.Signature property.
  • Added Block<T>.PublicKey property.
  • Added BlockHeader.Signature property.
  • Added BlockHeader.PublicKey property.
  • Added InvalidBlockPublicKeyException class.
  • Added InvalidBlockSignatureException class.
• IStateStore now requires implementations to be trie. [#1128, #1146, #1492]
  • Added IStateStore.GetStateRoot() method.
  • Added IStateStore.PruneStates() method.
  • Removed IStateStore.SetStates<T>() method.
  • Removed IStateStore.GetState() method.
  • Removed IStateStore.ContainsBlockStates() method.
  • Removed IStateStore.ForkStates<T>() method.
• TrieStateStore no more stores associations between Block<T>.Hash/Block<T>.PreEvaluationHash and Block<T>.StateRootHash, because Block<T>.StateRootHash became mandatory. [#1128, #1146, #1492]
  • Added ITrie.Recorded property.
  • Removed IKeyValueStore stateHashKeyValueStore parameter from TrieStateStore() constructor.
  • Removed TrieStateStore.GetTrie() method.
  • Removed TrieStateStore.GetRootHash() method.
  • Replaced TrieStateStore.PruneStates(IImmutableSet<BlockHash>) method with TrieStateStore.PruneStates(IImmutableSet<HashDigest<SHA256>>) method.
• The types of BlockChain<T>.MineBlock() overloaded methods' miner parameter became PrivateKey (were Address). [#1457, #1507]

Backward-incompatible network protocol changes

• The Block<T>.CurrentProtocolVersion is bumped from 1 to 2: [#1507]
  • Block's total difficulty value became included to the input of block hashes and pre-evaluation hashes since the protocol version 2.
  • Blocks became to have miner's public key as well since the protocol version 2. [#1457]
  • Blocks became to have no miner's address since the protocol version 2, because it can be derived from miner's public key. [#1457]
  • Blocks became to have a signature made using miner's private key since the protocol version 2. Block signatures affect block hashes. [#1457]

Added APIs

• Added BlockMetadata class. [#1164, #1457, #1492, #1507]
• Added BlockContent<T> class. [#1164, #1492]
• Added PreEvaluationBlockHeader class. [#1146, #1164, #1457, #1492, #1507]
• Added PreEvaluationBlock<T> class. [#1146, #1164, #1457, #1492, #1507]
• Added BlockDigest.FromBlock<T>() static method. [#1492]
• Added Block<T>(PreEvaluationBlock<T>, HashDigest<SHA256>) overloaded constructor. [#1146, #1164, #1492]
• Added Block<T>.HashAlgorithm property. [#1492]
• Added Block<T>.PublicKey property. [#1457, #1507]
• Added Block<T>.Signature property. [#1457, #1507]
• Added Block<T>(PreEvaluationBlock<T>, HashDigest<SHA256>, ImmutableArray<byte>?) overloaded constructor. [#1164, #1457, #1492, #1507]
• Added Block<T>(IBlockHeader, IEnumerable<Transaction<T>>) overloaded constructor. [#1164, #1492]
• Added BlockHeader.HashAlgorithm property. [#1492]
• Added BlockHeader.PublicKey property. [#1457, #1507]
• Added BlockHeader.Signature property. [#1457, #1507]
• Added BlockHeader(PreEvaluationBlockHeader, HashDigest<SHA256>, ImmutableArray<byte>?) overloaded constructor. [#1164, #1457, #1492, #1507]
• Added BlockHeader(PreEvaluationBlockHeader, HashDigest<SHA256>, ImmutableArray<byte>?, BlockHash) overloaded constructor. [#1164, #1457, #1492, #1507]
• Added IBlockMetadata interface. [#1164, #1457, #1492, #1507]
  • Block<T> became to implement IBlockMetadata interface.
  • BlockHeader became to implement IBlockMetadata interface.
  • BlockMetadata became to implement IBlockMetadata interface.
  • BlockContent<T> became to implement IBlockMetadata interface.
  • PreEvaluationBlockHeader became to implement IBlockMetadata interface.
  • PreEvaluationBlock<T> became to implement IBlockMetadata interface.
  • BlockDigest became to implement IBlockMetadata interface.
• Added IBlockContent<T> interface. [#1164, #1492]
  • Block<T> became to implement IBlockContent<T> interface.
  • BlockContent<T> became to implement IBlockContent<T> interface.
  • PreEvaluationBlock<T> became to implement IBlockContent<T> interface.
• Added IPreEvaluationBlockHeader interface. [#1164, #1492]
  • Block<T> became to implement IPreEvaluationBlockHeader interface.
  • BlockHeader became to implement IPreEvaluationBlockHeader interface.
  • PreEvaluationBlockHeader became to implement IPreEvaluationBlockHeader interface.
  • PreEvaluationBlock<T> became to implement IPreEvaluationBlockHeader interface.
• Added IPreEvaluationBlock<T> interface. [#1164, #1492]
  • Block<T> became to implement IPreEvaluationBlock<T> interface.
  • PreEvaluationBlock<T> became to implement IPreEvaluationBlock<T> interface.
  • ActionEvaluator<T>.Evaluate() method's block parameter became to take IPreEvaluationBlock<T> (was IBlock<T>).
• Added IBlockHeader interface. [#1146, #1164, #1492]
  • Block<T> became to implement IBlockHeader interface.
  • BlockHeader became to implement BlockHeader interface.
• Added BlockMetadataExtensions static class. [#1164, #1492]
• Added BlockContentExtensions static class. [#1164, #1492]
• Added BlockMarshaler static class. [#1164, #1492]
• Added BlockDigest.GetHeader() method. [#1492]
• Added StateStoreExtensions static class. [#1128, #1146, #1492]
• Added StoreExtensions.GetStateRootHash() extension method. [#1128, #1146, #1492]
• Added DelayedRenderer<T>.HashAlgorithmGetter property. [#1492]
• BlockDigest became to implement IBlockExcerpt. [#1492]
• Added InvalidBlockPublicKeyException class. [#1457, #1507]
• Added InvalidBlockSignatureException class. [#1457, #1507]

Behavioral changes

• Block<T>.Transactions property is now ordered by Transaction<T>.Id so that it's consistent with IBlockContent<T>'s other implementations. As this behavior can be changed in the later releases, do not depend on its ordering, but explicitly sort them before use when the order needs to b guaranteed. [#1492]
• Blocks and block metadata became to have their miners' public keys too. Although it is backward compatible to the earlier protocol version than 2, blocks with the protocol version 2 or later must have public keys. If a block lacks public key, InvalidBlockPublicKeyException is thrown. [#1457, #1507]
• PublicKey.ToString() method now returns its hexadecimal representation in compressed form. [#1507]

Bug fixes

• Fixed NullReferenceException that PublicKey.Verify() method had thrown with a non-null empty signature. [#1507]
• Fixed TxExecution not updating during preload. [#1508, #1509]

Version 0.17.0

Released on September 28, 2021.

Backward-incompatible API changes

• Added StateCompleterSet<T>.ComplementAll property. [#1358, #1386]
• Added StateCompleterSet<T>.ComplementLatest property. [#1358, #1386]
• BlockPerception now implements IBlockExcerpt interface. [#1440]
  • BlockPerception.Excerpt property removed.
• TotalDifficultyComparer now implements IComparer<IBlockExcerpt> interface. [#1442]
• Return type for BlockDemandTable.Add() is now void. [#1435, #1443]
• Added BlockInsufficientTxsException. [#1445]
• PrivateKey() constructor's parameter type became IReadOnlyList<byte> (was byte[]). [#1464]
• PrivateKey.ByteArray property's type became ImmutableArray<byte> (was byte[]). To get a mutable one, use PrivateKey.ToByteArray() method instead. [#1464]
• PublicKey() constructor's parameter type became IReadOnlyList<byte> (was byte[]). [#1464]
• PublicKey.Verify() method's both parameter types became IReadOnlyList<byte> (were both byte[]). [#1464]
• HashDigest<T>.DeriveFrom() method's parameter type became IReadOnlyList<byte> (was byte[]). [#1464]
• IBlockPolicy<T>.GetMaxBlockBytes() description changed for 0 and negative values. [#1449, #1463]
  • Returned values from these will now be taken literally by BlockChain<T>.
• Removed IBlockPolicy<T>.MaxTransactionsPerBlock property. It is replaced by IBlockPolicy<T>.GetMaxTransactionsPerBlock(long index) method. [#1447]
• Added IBlockPolicy<T>.GetMaxTransactionsPerBlock(long index) method. [#1447]
• Added IBlockPolicy<T>.GetMinTransactionsPerBlock(long index) method. [#1479]
• Added IBlockPolicy<T>.GetMaxTransactionsPerSignerPerBlock(long index) method. [#1449, #1463]
• Unused parameter currentTime removed from BlockChain<T>.Append(). [#1462, #1465]
• Added an optional maxTransactionsPerSigner parameter to BlockChain<T>.MineBlock() method. [#1449, #1463]
• Added an optional txPriority parameter to BlockChain<T>.MineBlock() method. [#1477]
• BlockHeader's properties are now represented as richer types than before. [#1470]
  • BlockHeader.Timestamp property's type became DateTimeOffset (was string).
  • BlockHeader.Nonce property's type became Nonce (was ImmutableArray<byte>).
  • BlockHeader.Miner property's type became Address (was ImmutableArray<byte>).
  • BlockHeader.PreviousHash property's type became BlockHash? (was ImmutableArray<byte>).
  • BlockHeader.TxHash property's type became HashDigest<SHA256>? (was ImmutableArray<byte>).
  • BlockHeader.Hash property's type became BlockHash (was ImmutableArray<byte>).
  • BlockHeader.StateRootHash property's type became HashDigest<SHA256>? (was ImmutableArray<byte>).
  • Removed BlockHeader(int, long, string, ImmutableArray<byte>, ImmutableArray<byte>, long, BigInteger, ImmutableArray<byte>, ImmutableArray<byte>, ImmutableArray<byte>, ImmutableArray<byte>, ImmutableArray<byte>) constructor. Use BlockHeader(int, long, DateTimeOffset, Nonce, Address, long, BigInteger, BlockHash?, HashDigest<SHA256>?, BlockHash, ImmutableArray<byte>, HashDigest<SHA256>?) constructor instead.
• IStore, IStateStore, and IKeyValueStore interfaces now inherit IDisposable. [#1448, #1474]
• Multiple changes for IBlockPolicy<T> interface. [#1485]
  • bool DoesTransactionFollowsPolicy(BlockChain<T>, Transaction<T>) changed to TxPolicyViolationException? ValidateNextBlockTx( BlockChain<T>, Transaction<T>).
  • InvalidBlockException ValidateNextBlock(BlockChain<T>, Block<T>) changed to BlockPolicyViolationException? ValidateNextBlock( BlockChain<T>, Block<T>).
  • BlockPolicy<T>, the default implementation for IBlockPolicy<T>, has been updated accordingly.
• Removed BlockPolicy<T>() constructor with int blockIntervalMilliseconds parameter. Use the one with TimeSpan? blockInterval instead. [#1485]
• Replaced int maxBlockBytes and int maxGenesisBytes parameters from BlockPolicy<T>() constructor with Func<long, int>? getMaxBlockBytes. [#1485]
• Removed TxViolatingBlockPolicyException class. [#1485]
• Optional parameter name difficultyBoundDivisor for BlockPolicy<T>() constructor changed to difficultyStability. [#1495]
• Type for optional parameter difficultyStability for BlockPolicy<T>() constructor changed to long? from int?. [#1495]

Backward-incompatible network protocol changes

• Message became to serialize peer with Bencodex instead of BinaryFormatter. [#1455]

Added APIs

• IBlockExcerpt.ExcerptEquals extension method added. [#1440]
• Added PrivateKey.FromString() method. [#1475]
• Added PrivateKey.Sign(ImmutableArray<byte>) overloaded method. [#1464]
• Added PrivateKey.Decrypt(ImmutableArray<byte>) overloaded method. [#1464]
• Added PrivateKey.ToByteArray() method. [#1464]
• Added PublicKey.Encrypt(ImmutableArray<byte>) overloaded method. [#1464]
• Added PublicKey.ToImmutableArray() method. [#1464]
• Added Nonce(ImmutableArray<byte>) overloaded constructor. [#1464]
• Added HashAlgorithmType.Digest(IEnumerable<byte[]>) overloaded method. [#1480]
• Added HashAlgorithmType.Digest(IEnumerable<ImmutableArray<byte>>) overloaded method. [#1480]
• Added BlockHeader(int, long, DateTimeOffset, Nonce, Address, long, BigInteger, BlockHash?, HashDigest<SHA256>?, BlockHash, ImmutableArray<byte>, HashDigest<SHA256>?) constructor. [#1470]
• Added TxCompletion<TPeer, TAction> class. [#1420, #1478]
• Added BlockPolicyViolationException and TxPolicyViolationException classes. [#1485]
• Added DifficultyAdjustment static class. [#1495]
• Added BlockPolicy<T>.DifficultyStability and BlockPolicy<T>.MinimumDifficulty properties. [#1495]

Behavioral changes

• StateCompleterSet<T>.Recalculate now evaluates states even for those already in IStateStore. Moreover, it also terminates early if possible after reaching the BlockHash provided with a call. [#1358, #1386]
• TotalDifficultyComparer no longer considers perceived time when comparing IBlockExcerpts. [#1442]
• General logic for determining the canonical chain has been updated. [#1435, #1443]
  • Perceived time is only used for marking a received header in BlockDemandTable in order to decide whether BlockDemand is stale or not. This should prevent a tip regression for a local node, as the tip of a chain is never considered as stale.
• Block sync using BlockDemand became not to fill blocks from multiple peers. [#1459]
• BlockChain<T>.MineBlock() now uses maxTransactions literally. [#1449, #1463]
  • Before, maxTransactions were internally automatically set to a value between 1 and BlockChain<T>.Policy.MaxTransactionsPerBlock.
• Similarly, BlockChain<T>.MineBlock() now internally uses BlockChain<T>.Policy.GetMaxBlockBytes() literally. [#1449, #1463]
• NetMQTransport became to no more send CreatePermission to TURN client and require permission-less TURN server. See coturn's relevant configuration as well. [#1423]
• Swarm<T> became to sync transactions from multiple peers at the same time. [#1420, #1478]

Bug fixes

• Improper sanity checks for targetBlockInterval (changed from the old name blockInterval), minimumDifficulty, and difficultyStability (changed from the old name difficultyBoundDivisor) arguments given to BlockPolicy<T>() constructor fixed. [#1495]
  • It was possible for targetBlockInterval to be zero, which would result in division by zero, when this makes no sense.
  • It was possible for difficultyStability not to be positive when this makes no sense.
  • Wrongly threw an ArgumentOutOfRangeException for the case where minimumDifficulty would equal difficultyStability.
  • It was possible for minimumDifficulty to be zero, which would allow difficulty to be stuck at zero indefinitely, when this does not make sense.

Version 0.16.0

Released on August 25, 2021.

Backward-incompatible API changes

• Removed Swarm<T>.BlockDemand property. [#1419, #1425]
• BlockChain<T>.Tip property is now non-nullable. [#1430]

Added APIs

• Added BlockDemandTable<T> class. [#1419, #1425]
• Added Swarm<T>.BlockDemandTable property. [#1419, #1425]
• Added SwarmOptions.PollInterval property. [#1419, #1425]
• Added SwarmOptions.MaximumPollPeers property. [#1419, #1425]

Behavioral changes

• Swarm<T> became to sync blocks from multiple peers. [#1419, #1425]

Bug fixes

• Fixed a bug where Swarm<T>.PreloadAsync() failed to sync blocks from the peer that has chain with higher difficulty, but lower index. [#1419, #1425]

CLI tools

Version 0.15.4

Released on September 14, 2021.

• Fixed a bug where BlockChain<T>.MineBlock() had created a block that includes both transactions when there are two or more transactions with the same nonce on the stage. [#1491]

Version 0.15.3

Released on September 10, 2021.

• Fixed a bug where Swarm<T> fails to reply transaction when any of the requested transactions id in GetTxs message does not exist in the storage. [#1481]

Version 0.15.2

Released on September 3, 2021.

• Removed ITransport.SendMessageWithReplyAsync(BoundPeer, Message, TimeSpan?, int, CancellationToken) method. Instead, added ITransport.SendMessageWithReplyAsync(BoundPeer, Message, TimeSpan?, int, bool, CancellationToken) method. [#1458, #1461]
• Fixed a bug where GetTxs request failed to receive transactions if any messages are missing. [#1458, #1461]

Version 0.15.1

Released on August 28, 2021.

• NetMQTransport became to process message in non blocking way. [#1451]

Version 0.15.0

Released on August 18, 2021.

Backward-incompatible API changes

• Added IRandom.Seed property. [#1431]

Version 0.14.1

Released on August 18, 2021.

• Added additional tags to logging. [#1433]

Version 0.14.0

Released on Aug 5, 2021.

Added APIs

• Added NonblockRenderer<T> class. [#1402, #1422]
• Added NonblockActionRenderer<T> class. [#1402, #1422]

Version 0.13.2

Released on Aug 5, 2021.

• When a reorg happens, Swarm<T> now broadcasts a reorged chain tip first before rendering. [#1385, #1415]
• Fixed a bug where TurnClient hadn't been recovered when TURN connection had been disconnected. [#1424]

Version 0.13.1

Released on July 29, 2021.

• Fixed HashAlgorithmType.Digest() method's bug that it returns an incorrect digest bytes when it is called by multiple threads at a time. [#1411]

Version 0.13.0

Released on July 28, 2021.

Backward-incompatible API changes

• Added bool render = false option to Swarm<T>.PreloadAsync(). Blocks and actions in preloaded blocks will be rendered if the switch is set to true. [#1391]

Added APIs

• Added Transaction<T>.CreateUnsigned() method. [#1378]
• Added SwarmOptions.TableSize property. [#1401]
• Added SwarmOptions.BucketSize property. [#1401]

Behavioral changes

• Transaction<T>.Validate() became to throw InvalidTxSignatureException if the transaction was not signed. [#1378]

Bug fixes

• Fixed a bug where Swarm<T> had stopped when ObjectDisposedException is thrown during NetMQTransport.DoBroadcast(). [#1362, #1365]

CLI tools

Version 0.12.1

Released on July 28, 2021.

• Swarm<T>.PreloadAsync() now checks the existence of blocks in the storage (was in the blockchain). [#1324]

Version 0.12.0

Released on July 23, 2021.

Backward-incompatible API changes

• Block hashes are now represented as BlockHash, which was introduced in this release, which has been done as HashDigest<SHA256>. [#1192, #1197]
  • The type of Block<T>.Hash property became BlockHash (was HashDigest<SHA256>).
  • The type of Block<T>.PreviousHash property became BlockHash? (was HashDigest<SHA256>?).
  • The types of Block<T>() constructors' hash parameter became BlockHash (were HashDigest<SHA256>).
  • The types of Block<T>() constructors' previousHash parameter became BlockHash? (were HashDigest<SHA256>?).
  • The type of Block<T>.Mine() method's previousHash parameter became BlockHash? (was HashDigest<SHA256>?).
  • The return type of HashCash.Hash() method became BlockHash (was HashDigest<SHA256>).
  • The type of Transaction<T>() constructor's genesisHash parameter became BlockHash? (was HashDigest<SHA256>?).
  • The type of Transaction<T>.Create() method's genesisHash parameter became BlockHash? (was HashDigest<SHA256>?).
  • The type of Transaction<T>.GenesisHash property became BlockHash? (was HashDigest<SHA256>?).
  • The type of Transaction<T>.EvaluateActionsGradually() method's blockHash parameter became BlockHash (was HashDigest<SHA256>).
  • The type of Transaction<T>.EvaluateActions() method's blockHash parameter became BlockHash (was HashDigest<SHA256>).
  • The type of BlockChain[] indexer's parameter became BlockHash (was HashDigest<SHA256>).
  • The type of BlockChain.BlockHashes property became IEnumerable<BlockHash> (was IEnumerable<HashDigest<SHA256>>).
  • The type of BlockChain.ContainsBlock() method's blockHash parameter became BlockHash (was HashDigest<SHA256>).
  • The type of BlockChain.GetState() method's offset parameter became BlockHash? (was HashDigest<SHA256>?).
  • The type of BlockChain.GetBalance() method's offset parameter became BlockHash? (was HashDigest<SHA256>?).
  • The type of StateCompleter<T> delegate's blockHash parameter became BlockHash (was HashDigest<SHA256>).
  • The type of FungibleAssetStateCompleter<T> delegate's blockHash parameter became BlockHash (was HashDigest<SHA256>).
  • BlockSet<T> no more implements IDictionary<HashDigest<SHA256>, Block<T>>, but now implements IDictionary<BlockHash, Block<T>>.
  • The type of ActionExecutionState.ExecutedBlockHash property became BlockHash (was HashDigest<SHA256>).
  • The type of BlockDownloadState.ReceivedBlockHash property became BlockHash (was HashDigest<SHA256>).
  • The type of BlockVerificationState.VerifiedBlockHash property became BlockHash (was HashDigest<SHA256>).
  • The type of IncompleteBlockStatesException() constructor's blockHash parameter became BlockHash (was HashDigest<SHA256>).
  • The type of IncompleteBlockStatesException.BlockHash property became BlockHash (was HashDigest<SHA256>).
  • The types of InvalidGenesisBlockException() constructor's networkExpected and stored parameters became BlockHash (were HashDigest<SHA256>).
  • The type of InvalidGenesisBlockException.NetworkExpected property became BlockHash (was HashDigest<SHA256>).
  • The type of InvalidGenesisBlockException.Stored property became BlockHash (was HashDigest<SHA256>).
  • The type of InvalidTxGenesisHashException() constructor's expectedGenesisHash parameter became BlockHash (was HashDigest<SHA256>).
  • The type of InvalidTxGenesisHashException() constructor's improperGenesisHash parameter became BlockHash? (was HashDigest<SHA256>?).
  • The type of InvalidTxGenesisHashException.ExpectedGenesisHash property became BlockHash (was HashDigest<SHA256>).
  • The type of InvalidTxGenesisHashException.ImproperGenesisHash property became BlockHash? (was HashDigest<SHA256>?).
  • The return type of IStore.IndexBlockHash() method became BlockHash? (was HashDigest<SHA256>?).
  • The type of IStore.AppendIndex() method's hash parameter became BlockHash (was HashDigest<SHA256>).
  • Replaced IStore.ForkBlockIndexes() method's HashDigest<SHA256> branchPoint parameter with BlockHash branchpoint.
  • The return type of IStore.IterateIndexes() method became IEnumerable<BlockHash> (was IEnumerable<HashDigest<SHA256>>).
  • The return type of IStore.IterateBlockHashes() method became IEnumerable<BlockHash> (was IEnumerable<HashDigest<SHA256>>).
  • The type of IStore.GetBlock<T>() method's blockHash parameter became BlockHash (was HashDigest<SHA256>).
  • The type of IStore.GetBlockIndex() method's blockHash parameter became BlockHash (was HashDigest<SHA256>).
  • The type of IStore.GetBlockDigest() method's blockHash parameter became BlockHash (was HashDigest<SHA256>).
  • The type of IStore.DeleteBlock() method's blockHash parameter became BlockHash (was HashDigest<SHA256>).
  • The type of IStore.ContainsBlock() method's blockHash parameter became BlockHash (was HashDigest<SHA256>).
  • The type of IStateStore.GetState() method's blockHash parameter became BlockHash (was HashDigest<SHA256>).
  • The type of IStateStore.ContainsBlockStates() method's blockHash parameter became BlockHash (was HashDigest<SHA256>).
  • The type of TrieStateStore.GetRootHash() method's blockHash parameter became BlockHash (was HashDigest<SHA256>).
  • The type of TrieStateStore.PruneStates() method's excludeBlockHashes parameter became IImmutableSet<BlockHash> (was ImmutableHashSet<HashDigest<SHA256>>).
• Hash algorithm for PoW (Hashcash) became configurable. #1314, #1352
  • Added IBlockPolicy<T>.GetHashAlgorithm() method.
  • Added an optional HashAlgorithmType? hashAlgorithm parameter to Block<T>(long, long, BigInteger, Nonce, Address?, BlockHash?, DateTimeOffset, IReadOnlyList<Transaction<T>>, ImmutableArray<byte>?, HashDigest<SHA256>?, int protocolVersion) constructor.
  • Added HashAlgorithmType hashAlgorithm parameter to Block<T>.MineBlock() method.
  • The type of Block<T>.PreEvaluationHash property became ImmutableArray<byte>? (was HashDigest<SHA256>?). [#1192, #1197]
  • The types of Block<T>() constructors' preEvaluationHash parameter became ImmutableArray<byte>? (were HashDigest<SHA256>?). [#1192, #1197]
  • The type of InvalidBlockPreEvaluationHashException.ActualPreEvaluationHash and ExpectedPreEvaluationHash properties became ImmutableArray<byte> (were HashDigest<SHA256>). [#1192, #1197]
  • The type of InvalidBlockPreEvaluationHashException() constructor's actualPreEvaluationHash and and expectedPreEvaluationHash parameters became ImmutableArray<byte> (were HashDigest<SHA256>). [#1192, #1197]
  • Replaced UnexpectedlyTerminatedActionException() constructor's HashDigest<SHA256>? blockHash parameter with ImmutableArray<byte>? preEvaluationHash. [#1192, #1197]
  • Replaced UnexpectedlyTerminatedActionException.BlockHash property with PreEvaluationHash. [#1192, #1197]
  • Replaced Hashcash.Answer(Stamp, long, CancellationToken) method with Hashcash.Answer<T>(Stamp, HashAlgorithm, long, CancellationToken) method.
  • Removed Hashcash.Hash() method.
  • Removed HashDigest<T>.Satisfies() method. This was replaced by ByteUtil.Satisfies() method instead. [#1192, #1197]
  • Added hashAlgorithmGetter parameter to BlockSet<T>() constructor.
  • Added hashAlgorithm parameter to BlockChain<T>.MakeGenesisBlock() method.
  • Added an optional hashAlgorithmGetter parameter to BlockPolicy<T>() constructor.
• Added IActionContext.TxId property. [#1275]
• Added IStore.PutTxExecution(TxSuccess) method. [#1156, #1289]
• Added IStore.PutTxExecution(TxFailure) method. [#1156, #1289]
• Added IStore.GetTxExecution() method. [#1156, #1289]
• Removed the optional parameter Guid? chainId = null from IStateStore.GetState() method. [#1289]
• Removed compress parameter from DefaultStore() constructor. [#1289]
• Removed statesCacheSize parameter from DefaultStore() constructor. [#1289]
• Removed StunMessage.Parse(Stream) method. [#1228]
• Moved ITransport and NetMQTransport from Libplanet.Net to Libplanet.Net.Transports. [#1235]
• Block<T> now enforces a collection of Transaction<T>s to be less mutable. [#1274]
  • The type of Block<T>() constructor's transactions parameter became IReadOnlyList<T> (was IEnumerable<T>).
  • The type of Transactions property of Block<T> became IReadOnlyList<T> (was IEnumerable<T>).
• Types of following properties became IReadOnlyList<T> (was IEnumerable<T>). [#1230, #1271]
  • RoutingTable.Peers
  • RoutingTable.PeerStates
  • Swarm<T>.Peers
  • Swarm<T>.PeerStates
• Return type of RoutingTable.Neighbors() became IReadOnlyList<BoundPeer> (was IEnumerable<BoundPeer>). [#1230, #1271]
• All methods pertaining to evaluating IActions are moved to a new ActionEvaluator class. [#1301, #1305]
  • Removed Block<T>.Evaluate() method. Use ActionEvaluator.Evaluate() method instead.
  • Removed Block<T>.EvaluateActionsPerTx() method.
  • Removed Transaction<T>.EvaluateActionsGradually() method.
  • Removed Transaction<T>.EvaluateActions() method.
• Parameters action, inputContext, and outputStates for ActionEvaluation() constructor can no longer be null. [#1305]
• Added IStore.PutTxIdBlockHashIndex(TxId, BlockHash) method. [#1294, #1328]
• Added IStore.GetFirstTxIdBlockHashIndex(TxId) method. [#1294, #1328]
• Added IStore.DeleteTxIdBlockHashIndex(TxId, BlockHash) method. [#1294, #1328]
• Added IStore.IterateTxIdBlockHashIndex(TxId) method. [#1294, #1328]
• Parameter miner for Block<T>() and Block<T>.Mine() can no longer be null. [#1341]
• Swarm<T>.StartAsync() method became to receive broadcastBlockInterval (or millisecondsBroadcastBlockInterval) parameter. [#1351]
• Added the parameter minimumBroadcastTarget to NetMQTransport() constructor. [#1379]
• Removed InvalidTxUpdatedAddressesException. [#368, #1389]

Added APIs

• Added ActionEvaluator class. [#1301, #1305]
• Added BlockHash struct. [#1192, #1197]
• Added HashDigest<T>.DeriveFrom() method. [#1197]
• Added HashAlgorithmType class. [#1314, #1352]
• Added HashAlgorithmGetter delegate. [#1314, #1352]
• Added HashAlgorithmTable static class. [#1314, #1352]
• Added BlockChain<T>.GetTxExecution() method. [#1156, #1289]
• Added StunMessage.ParseAsync(Stream, CancellationToken) method. [#1228]
• Added Swarm<T>.AddPeersAsync() method. [#1234]
• Added NetMQTransport.QueryAppProtocolVersion() static method. [#1235]
• Added BoundPeer.Parse() static method. [#1240]
• Added TransportException class. [#1242]
• Added SwarmOptions.StaticPeers property. [#1230, #1271]
• Added SwarmOptions.StaticPeersMaintainPeriod property. [#1230, #1367]
• Added SwarmOptions.BranchpointThreshold property. [#1348]
• Added AtomicActionRenderer<T> class. [#1267, #1275]
• Added TxExecution abstract class. [#1156, #1289]
• Added TxSuccess class. [#1156, #1289]
• Added TxFailure class. [#1156, #1289]
• Added IExtractableException interface. [#1156, #1289]
• Added ExtractableException static class. [#1156, #1289]
• Added Address(Binary) overloaded constructor. [#1289]
• Added Currency(IValue) overloaded constructor. [#1289]
• Added Currency.Serialize() method. [#1289]
• Added ByteUtil.TimingSafelyCompare() method. [#1314, #1352]
• Added ByteUtil.Satisfies() method. [#1314, #1352]
• Added BlockChain<T>.ExecuteActions() method. [#1368]
• Added SwarmOptions.MinimumBroadcastTarget property. [#1379]

Behavioral changes

• BlockChain<T>.Append() now records a TxExecution for every single transaction in the appended Block<T>, whether a transaction is successful (TxSuccess is recorded for this case) or not (TxFailure is recorded for this case). [#1156, #1289]
• ITransport.StartAsync() and ITransport.RunAsync() became to throw TransportException instead of SwarmException. [#1242]
• NetMQTransport became to enforce NetMQ/AsyncIO to use its pure .NET implementation instead of Windows' IOCP when it is running on Mono, which powers Unity engine, since Unity does not properly implement the IOCP even on Windows. It had been done by Swarm<T>, but as the ITransport is now separated from it, this became done by NetMQTransport instead of Swarm<T>. [#247, #1278]
• (Libplanet.RocksDBStore) RocksDBStore.ForkBlockIndexes() became to share common ancestors between forks rather than duplicating them so that much less space is used. [#1280, #1287]
• BlockChain<T>.Append() cumulates indexes for pairs (TxId and BlockHash). A transaction inclusion for a block is retrievable by using this index. [#1315, #1329]
• ActionEvaluator<T>.EvaluateActions() now throws an unmanaged exception if OutOfMemoryException is caught from IAction.Execute(). [#1320, #1343]
• Improved performance of broadcasting using Swarm<T>. [#1334]
• Swarm<T> now maintains static peers provided via SwarmOptions.StaticPeers periodically. [#1230, #1367]
• Block<T>.Header is now cached instead of creating a new instance every call. [#1347]
• BlockChain<T>.ExecuteActions() became no longer throw InvalidTxUpdatedAddressesException. [#368, #1389]

Bug fixes

• Fixed a bug where executing Transaction<T>.Actions had not been atomic. Actions in a Transaction<T> now became executed all or nothing at all. [#1267, #1275]
  • Transaction<T>.EvaluateActions() method became atomic.
  • Transaction<T>.EvaluateActionsGradually() method had returned the same number of ActionEvaluations to Transaction<T>.Actions, but now became to omit the evaluations after the first action throwing an exception. If no action throws any exception, it still returns the same number of ActionEvaluations to Transaction<T>.Actions.
  • State-wise, Transaction<T>s having any exception-throwing action now do not commit any changes at all to IStateStore.
  • Rendering-wise, for actions following the first exception-throwing action, action rendering methods in IActionRenderer<T> (RenderAction(), RenderActionError(), UnrenderAction(), and UnrenderActionError()) became not invoked. If you want to dismiss all actions in unsuccessful transactions at all, wrap your action renderer with AtomicActionRenderer<T>.
• Fixed a bug where KademliaProtocol.BootstrapAsync() has sent multiple Ping messages to other peers. [#1219]
• Fixed a bug where KademliaProtocol.CheckReplacementCacheAsync() has updated cached peers multiple times. [#1219]
• Fixed memory leak due to undisposed CancellationTokenRegistrations. [#1228]
• Fixed a bug where DefaultStore.Dispose() and TrieStateStore.Dispose() had not been idempotent. [#1272]
• (Libplanet.RocksDBStore) Fixed a bug where RocksDBStore.Dispose(), MonoRocksDBStore.Dispose(), and RocksDBKeyValueStore.Dispose() had not been idempotent. [#1272, #1289]
• Fixed a bug where NetMQTransport had hung forever within Mono runtime. [#1278]
• Fixed a bug where DefaultStore.ForkBlockIndexes() hadn't copied genesis block. [#1325]
• (Libplanet.RocksDBStore) Fixed a bug where RocksDBStore.GetBlock<T>() and RocksDBStore.GetTransaction<T>() handn't returned expected values in multithreading environment. [#1339, #1342]
• Fixed a bug where chain synchronization had been incorrectly updated with an improper chain. [#1349, #1350]
• Fixed a bug where Swarm<T> hadn't respond immediately under load. [#1360]

CLI tools

• Added the option --json to planet apv analyze command to print result as JSON format. [#1240]
• Added planet apv query subcommand to query app protocol version of specific peer. [#1240]
• Added the option --no-passphrase to planet key remove command to remove key without asking passphrase. [#1213, #1265]
• Added planet key derive subcommand to derive the address or public key from a private. [#1268]
• Added planet store [block-by-hash|block-by-index|tx-by-id] commands to retrieve the data from the store. [#1284, #1285, #1298]
• Added planet store block-by-tx-id commands to retrieve the data from the store. [#1316, #1340]
• Added planet store build-index-tx-block commands to build index from TxId to BlockHash. [#1316, #1340]
• Added planet stats summary command to retrieve a state summary of a stored chain in a CSV format. [#1353]

Version 0.11.1

Released on April 22, 2021.

• Fixed a bug where block synchronization had stopped due to internal errors. [#1259]

Version 0.11.0

Released on March 30, 2021.

Backward-incompatible API changes

• Added the parameter protocolVersion to Block<T>(long, long, BigInteger, Nonce, Address?, HashDigest<SHA256>?, DateTimeOffset, IEnumerable<Transaction<T>> transactions, HashDigest<SHA256>?, HashDigest<SHA256>?) constructor. [#1142, #1147, #1162]
• Added the parameter to protocolVersion to Block<T>.Mine() method. [#1142, #1147, #1162]
• Added the first parameter protocolVersion to BlockHeader() constructor. [#1142, #1147, #1162]
• Added stagePolicy as the second parameter to BlockChain<T>() constructor. [#1130, #1131]
• Added IBlockPolicy<T>.CanonicalChainComparer property to make the canonical chain. [#1155, #1165, #1184]
• Added canonicalChainComparer as the last parameter to BlockPolicy() constructors. [#1155, #1165, #1184]
• Added canonicalChainComparer as the second parameter to DelayedRenderer() constructor. [#1155, #1165, #1184]
• Added canonicalChainComparer as the second parameter to DelayedActionRenderer() constructor. [#1155, #1165, #1184]
• Added reorgResistantHeight parameter into DelayedActionRenderer<T>() constructor. [#1163]
• Added IStore.SetBlockPerceivedTime() method. [#1184]
• Added IStore.GetBlockPerceivedTime() method. [#1184]
• Removed TransactionSet<T> class. [#1165]
• Removed IBlockStatesStore interface. [#1117]
• Removed BaseBlockStatesStore abstract class. [#1117]
• Removed Swarm<T>.GetTrustedStateCompleterAsync() method. [#1117]
• Removed trustedStateValidators parameter from Swarm<T>.PreloadAsync() method. [#1117]
• Removed Swarm<T>.TraceTable() method. [#1120]
• Added IActionContext.BlockAction property. [#1143]
• Added nullable TimeSpan-typed messageLifespan parameter into NetMQTransport() constructor. [#1171]
• Added IStore.ForkTxNonces() method. [#1198]
• Removed PeerState.Address Property. [#1215]
• IProtocol.RebuildConnectionAsync(CancellationToken) method was replaced by, IProtocol.RebuildConnectionAsync(int, CancellationToken) method. [#1215]

Backward-incompatible network protocol changes

• Swarm<T> became no longer retry when Swarm<T> receives less than 500 blocks. [#1112]
• The existing ChainStatus message type (with the type number 0x24) was replaced by a new ChainStatus message type (with the type number 0x25). [#1155, #1165]
• Removed the message types depended on features of IBlockStatesStore interface. [#1117]
  • GetRecentStates message type (with the type number 0x0b)
  • RecentStates message type (with the type number 0x13)
  • GetBlockStates message type (with the type number 0x22)
  • BlockStates message type (with the type number 0x23)
• Swarm<T> became to ignore messages made earlier than a certain amount of time, which is configured by SwarmOptions.MessageLifespan. [#1160, #1171]

Backward-incompatible storage format changes

• (Libplanet.RocksDBStore) The blocks and transactions became stored in multiple databases. Each block and transaction belongs to a partition of the database, according to its epoch unit, which is its Unix timestamp. Every epoch is divided by certain seconds, configured by RocksDBStore() constructor's txEpochUnitSeconds and blockEpochUnitSeconds parameters (86,400 by default). [#1183, #1194]
• (Libplanet.RocksDBStore) Continue on partitioning of database, RocksDBStore() is manage database connection by LRU Cache. The max size of connection cache is configured by RocksDBStore() constructor's dbConnectionCacheSize parameters (100 by default). [#1183, #1194]
• (Libplanet.RockDBStore) The RocksDBStore that was previously used has been separated into a class called MonoRocksDBStore. Please use this class if you need to migrate. [#1183, #1204]

Added APIs

• Added Block<T>.CurrentProtocolVersion constant. [#1142, #1147]
• Added Block<T>.ProtocolVersion property. [#1142, #1147]
• Added Block<T>.Header property. [#1070, #1102]
• Added BlockHeader.ProtocolVersion property. [#1142, #1147]
• Added IBlockExcerpt interface. [#1155, #1165, #1170]
• Added BlockExcerpt static class. [#1155, #1165, #1170, #1184]
• Block<T> became to implement IBlockExceprt interface. [#1155, #1165, #1170]
• BlockHeader became to implement IBlockExceprt interface. [#1155, #1165, #1170]
• Added BlockPerception struct. [#1155, #1184]
• Added BlockChain<T>.PerceiveBlock() method. [#1155, #1184]
• Added DelayedRenderer<T>.CanonicalChainComparer and DelayedActionRenderer<T>.CanonicalChainComparer properties. [#1155, #1165, #1184]
• Added TotalDifficultyComparer class. [#1155, #1165, #1170, #1184]
• Added IStagePolicy<T> interface. [#1130, #1131, #1186]
• Added VolatileStagePolicy<T> class. [#1130, #1131, #1136, #1186]
• Added ITransport interface. [#1052]
• Added NetMQTransport class which implements ITransport. [#1052]
• Added Message abstract class. [#1052]
• Added BlockExceedingTransactionsException class. [#1104, #1110]
• Added BlockChain<T>.GetStagedTransactionIds() method. [#1089]
• (Libplanet.RocksDBStore) Added maxTotalWalSize, keepLogFileNum and maxLogFileSize parameters into RocksDBStore() constructor. [#1065, #1102, #1132]
• Added Swarm<T>.BlockDemand property. [#1068, #1102]
• Added BlockDemand struct. [#1068, #1102]
• Added TurnClient.PublicAddress property. [#1074, #1102]
• Added TurnClient.EndPoint property. [#1074, #1102]
• Added TurnClient.BehindNAT property. [#1074, #1102]
• Added TurnClient.InitializeTurnAsync(int, CancellationToken) method. [#1074, #1102]
• Added TurnClient.StartAsync(int, CancellationToken) method. [#1074, #1102]
• Added TurnClient.ReconnectTurn(int, CancellationToken) method. [#1074, #1102]
• Added TurnClient.IsConnectable(CancellationToken) method. [#1074, #1102]
• Added TurnClient.ReconnectTurn(CancellationToken) method. [#1074, #1102]
• Added Libplanet.Blockchain.Renderers.Debug.RenderRecord<T> abstract class and its subclasses: [#1119]
  • RenderRecord<T>.ActionBase abstract class
  • RenderRecord<T>.ActionSuccess class
  • RenderRecord<T>.ActionError class
  • RenderRecord<T>.BlockBase abstract class
  • RenderRecord<T>.Block class
  • RenderRecord<T>.Reorg class
• Added Libplanet.Blockchain.Renderers.Debug.RecordingActionRenderer<T> class. [#1119]
• Added Libplanet.Blockchain.Renderers.Debug.ValidatingActionRenderer<T> class. [#1119]
• Added Libplanet.Blockchain.Renderers.Debug.InvalidRenderException<T> class. [#1119]
• Added InvalidBlockProtocolVersionException class. [#1142, #1147]
• Added InvalidBlockTxHashException class. [#1116]
• Added Swarm<T>.PeerStates property. [#1120]
• Added IProtocol interface. [#1120]
• Added KademliaProtocol class which implements IProtocol. [#1120, #1135]
• Added reorgResistantHeight parameters into DelayedActionRenderer<T>() constructor. [#1163]
• Added InvalidBlockPreEvaluationHashException class. [#1148]
• Added the parameter validate which is true by default, to Transaction<T>.Deserialize(). [#1149]
• Added SwarmOptions.MessageLifespan property. [#1171]
• Added InvalidTimestampException class. [#1171]
• Added PeerState.Peer Property. [#1215]
• Added SwarmOptions.RefreshPeriod property, which is 10 seconds by default. [#1215]
• Added SwarmOptions.RefreshLifespan property, which is 60 seconds by default. [#1215]

Behavioral changes

• Upgraded Bencodex package (which is a dependency) so that Libplanet gets benefits from its recent optimizations. [#1081, #1084, #1086, #1101]
• Introduced the protocol versioning scheme. This purposes to change the protocol without breaking backward compatibility. Even the protocol is changed, the existing blocks made before the new protocol are guaranteed to behave as it had done. [#1142, #1147, #1155 #1162, #1170, #1184]
• Since BlockHeader.ProtocolVersion was added, the existing blocks are considered protocol compliant with the protocol version zero. [#1142, #1147, #1162]
• When a BlockChain<T> follows VolatileStagePolicy<T>, which is Libplanet's the only built-in IStagePolicy<T> implementation at the moment, as its StagePolicy, its staged transactions are no longer persistent but volatile instead. It also automatically purges staged transactions after the given Lifetime, which is 3 hours by default. [#1130, #1131, #1136, #1186]
• Swarm<T> became not to receive states from trusted peers. [#1061, #1102]
• Swarm<T> became not to retry when block downloading. [#1062, #1102]
• Improved performance of BlockChain<T>.MineBlock(). [#1116, #1124]
• Improved performance of Block<T>.Deserialize(). [#1116]
• Swarm<T> became not to fill states from trusted peers, because now states can be validated rather than trusted due to MPT. [#1117]
• HashDigest<SHA256> became serializable. [#795, #1125]
• Transaction<T>() constructors became not to validate itself. [#1149]
• BlockChain<T>.Append() became to validate the given Block<T> before storing its StateRootHash. [#1172]
• Blockchain<T> became not to stage transactions having nonce less than or equal to the nonce of the same signer's latest transaction in already mined blocks. [#1173, #1180, #1186]
• Improved security of Message.Parse(). [#1161, #1181]
• Improved performance of BlockChain<T>.Fork(). [#1198]
• Swarm<T> became not to call KademliaProtocol.RebuildConnectionAsync() right after Swarm<T>.StartAsync(). If you called Swarm<T>.BootstrapAsync() before Swarm<T>.StartAsync(), peers in your table may not have you in their table right after Swarm<T>.StartAsync() (which was almost guaranteed before). [#1208]
• Peers added during Swarm<T>.BootstrapAsync() before Swarm<T>.StartAsync() are now marked as stale so that Swarm<T>.RefreshTableAsync() will update. [#1215]
• Following classes became to leave log messages with its class as logging context. [#1218]
  • TrieStateStore class
  • TurnClient class
  • ActionEvaluation class

Bug fixes

• Fixed a bug where BlockChain<T>.MineBlock() was not automatically cancelled when the tip of the chain was changed occasionally. [#1141]
• Fixed a bug where blocks with invalid PreEvaluationHash was considered as a valid block. [#1148, #1202]
• Fixed a vulnerability of the IAccountStateDelta.TransferAsset()'s internal implementation that it had doubled recipient's balance when a sender and a recipient is the same. *Since this changes the protocol, for backward compatibility, the actions belonging to the existing block, which was mined before the protocol v1, are guaranteed to still behave as it had done. [#1152]
• Fixed a bug where Block<T>.Evaluate() hadn't validate its hash. [#1168]
• Fixed memory leak due to undisposed CancellationTokenSources. [#1182, #1212]
• Fixed a bug where TurnClient hadn't released its relay connections after reconnecting. [#1185]

CLI tools

• planet mpt diff command became to take 4 arguments (which was 3) so that it can compare state root hashes from two different KV stores. The existing commands like planet mpt diff STORE A B do not work anymore, and these should be instead like planet mpt diff STORE A STORE B. [#1129]
• Store aliases used by planet mpt became to disallow names looking like URIs to disambiguate aliases from the literal store URIs. [#1129]
• Added new subcommands planet mpt list and planet mpt query. [#1137]
• planet mpt diff command became to print the differences between other state root hashes into stdout as JSON format. [#1138, #1191, #1233]

Version 0.10.3

Released on January 28, 2021.

• BlockChain<T>.MineBlock() became to unstage transactions that have lower nonce than expected. [#1174]

Version 0.10.2

Released on November 25, 2020.

• Fixed BlockChain<T>.Append() method's bug that it had accepted a Block<T> having more Transactions than the number specified by the IBlockPolicy<T>.MaxTransactionsPerBlock property. Now it throws InvalidBlockException instead for such case. [#1104]

Version 0.10.1

Released on November 24, 2020.

• Transaction<T>.Id property became lazy-loaded and cached if it's once loaded. (It had been loaded when the object is instantiated.) [#1079, #1080]
• The result bytes of Transaction<T>.Serialize() became cached under the hood. [[#1079, #1080]]
• Fixed BlockChain<T>.MineBlock() method's bug which excludes one's all transactions virtually forever after a signer's transactions once have been staged without the ascending order of nonce (usually due to their inconsistent propagation latency on the network). [#1057, #1059]
• BlockChain<T>.MineBlock() method became to cut off staged transactions to mine if it takes longer than 4 seconds to collect and validate them. Those rest staged transactions are postponed until next block mining. [#1057, #1059]
• BlockChain<T>.ContainsBlock() method was optimized so that it does not needlessly load an entire block, but looks up only an index instead. [#1057, #1059]
• BlockChain<T> became not to validate genesis block during fork, where the state store is not an implementation of IBlockStatesStore. [#1063]
• Fixed a bug where Swarm<T>.GetPeerChainStateAsync() has thrown NullReferenceException when peers in table does failed to respond. [#1066]
• Fixed a bug where BlockChain<T> had not locked readers–writer lock for state changes during MineBlock(). [#1077, #1087]
• PolymorphicAction<T>.ToString() became more human-readable. [#1085, #1087]
• Fixed a bug where MerkleTrie had had MrrkleTrie.EmptyRootHash as root node, which had been unable to insert new nodes. [#1087, #1091]

Version 0.10.0

Released on October 27, 2020.

Backward-incompatible API changes

• Extracted rendering methods from IAction to IRenderer<T>, which is introduced in this version. From now on, rendering logic needs to be injected from outside through BlockChain<T>.Renderers, rather than IActions knowing how to render themselves. IRenderer<T> also unified BlockChain<T>.TipChanged event, and introduced new events like IActionRenderer<T>.RenderActionError(), IActionRenderer<T>.RenderBlockEnd(), IRenderer<T>.RenderReorg(), and IRenderer<T>.RenderReorgEnd(). [#860, #875, #959, #963]
  • Removed IAction.Render() method, which was replaced by IActionRenderer<T>.RenderAction().
  • Removed IAction.Unrender() method, which was replaced by IActionRenderer<T>.UnrenderAction().
  • Removed BlockChain<T>.TipChanged event, which was replaced by IRenderer<T>.RenderBlock().
  • Removed PolymorphicAction<T>.Render() and Unrender() methods.
  • Removed BlockChain<T>.TipChangedEventArgs class.
• Added methods related fungible asset states to IAccountStateDelta: [#861, #900, #954]
  • UpdatedFungibleAssetsAccounts property
  • MintAsset(Address, Currency, BigInteger) method
  • TransferAsset(Address, Address, Currency, BigInteger) method
  • BurnAsset(Address, Currency, BigInteger) method
  • GetBalance(Address, Currency) method
• Added IAccountStateDelta.StateUpdatedAddresses property in order to distinguish state updates from asset states. [#861, #900]
• Added an optional parameter AccountBalanceGetter accountBalanceGetter to Block<T>.EvaluateActionsPerTx() method. [#861, #900]
• BlockChain<T>.StageTransaction() became to throw InvalidTxGenesisHashException when it takes a Transaction<T> from a heterogeneous BlockChain<T> with a different genesis block. [#796, #878]
• Added renderers optional parameter to BlockChain<T>() constructor. [#883, #959, #963]
• Added BigInteger-typed totalDifficulty parameter to Block<T>() constructor. [#666, #917]
• Added BigInteger-typed previousTotalDifficulty parameter to Block<T>.Mine() static method. [#666, #917]
• Added options optional parameter to Swarm<T>() constructor. [#926]
• ICryptoBackend became to ICryptoBackend<T>. [#932]
• ICryptoBackend.Verify(HashDigest<SHA256>, byte[], PublicKey) became to ICryptoBackend<T>.Verify(HashDigest<T>, byte[], PublicKey) [#932]
• Added ICryptoBackend<T>.Sign(HashDigest<T>, PrivateKey) method. [#932]
• DefaultCryptoBackend became to DefaultCryptoBackend<T>. [#932]
• Added ImmutableArray<byte>-typed preEvaluationHash parameter to BlockHeader constructor. [#931, #935]
• Added HashDigest<SHA256>-typed preEvaluationHash parameter to Block<T>() constructor. [#931, #935]
• Replaced SerializationInfoExtensions.GetValueOrDefault<T>() to SerializationInfoExtensions.TryGetValue<T>(). [#940]
• Added bool append = true option to both BlockChain<T>.MineBlock() overloaded methods. Although this breaks ABI-level backward compatibility (i.e., you need to rebuild your assemblies), still is backward-compatible at API-level as the option is turned on by default. [#946]
• Added int? maxTransactions option to both BlockChain<T>.MineBlock() overloaded methods. Although this breaks ABI-level backward compatibility (i.e., you need to rebuild your assemblies), still is backward-compatible at API-level as the option is turned on by default. [#1037, #1039, #1050]
• Added StateCompleterSet<T>? stateCompleters option to two BlockChain<T>.Append() overloaded methods. Although this breaks ABI-level backward compatibility (i.e., you need to rebuild your assemblies), still is backward-compatible at API-level as the option has the default value (StateCompleterSet<T>.Recalculate). [#946]
• Added CancellationToken cancellationToken = default(CancellationToken) option to BlockChain<T>.MineBlock(Address miner) overloaded method. Although this breaks ABI-level backward compatibility (i.e., you need to rebuild your assemblies), still is backward-compatible at API-level as the option has the default value. [#946]
• Added IImmutableSet<Address> trustedStateValidators = null option to both Swarm<T>.StartAsync() overloaded methods. Although this breaks ABI-level backward compatibility (i.e., you need to rebuild your assemblies), still is backward-compatible at API-level as the option is turned on by default. [#946]
• Removed Peer.AppProtocolVersion property. [#949]
• Removed Peer.IsCompatibleWith() method. [#949]
• Replaced Peer(PublicKey, AppProtocolVersion) constructor with Peer(PublicKey) constructor. [#949]
• Replaced BoundPeer(PublicKey, DnsEndPoint, AppProtocolVersion) constructor with Peer(PublicKey, DnsEndPoint) constructor. [#949]
• Extracted IStore's some methods dedicated to block states into IBlockStatesStore. [#950]
  • ListStateKeys() method.
  • ListAllStateReferences() method.
  • LookupStateReference() method.
  • IterateStateReferences() method.
  • StoreStateReference() method.
  • ForkStateReferences() method.
  • GetBlockStates() method.
  • SetBlockStates() method.
  • PruneBlockStates() method.
• The signature of IStore.LookupStateReference<T>(Guid, string, Block<T>) method was changed to LookupStateReference(Guid, string, long). [#950]
• Added IStateStore-typed stateStore to BlockChain<T> constructor. [#950]
• Replaced Swarm<T>.FindSpecificPeerAsync(Address, Address, int, BoundPeer, TimeSpan?, CancellationToken) method with Swarm<T>.FindSpecificPeerAsync(Address, int, TimeSpan?, CancellationToken). [#981]
• Added IActionContext.GetUnconsumedContext() method. [#980]
• Added ImmutableArray<byte>-typed stateRootHash parameter to BlockHeader constructor. [#986]
• Added HashDigest<SHA256>-typed stateRootHash parameter to Block<T>() constructor. [#986]
• Added IBlockPolicy<T>.MaxTransactionsPerBlock property. [#1037, #1050]
• Added IBlockPolicy<T>.GetMaxBlockBytes() method. [#201, #1050]
• IBlockPolicy<T>.DoesTransactionFollowPolicy() method became to take additional BlockChain<T> parameter as its context. [#1012]
• Methods in BlockPolicy<T> class became virtual. [#1010]
• Added int maxTransactionsPerBlock option to both BlockPolicy<T>() overloaded constructors. [#1037, #1050]
• Added int maxBlockBytes and int maxGenesisBytes options to both BlockPolicy<T>() overloaded constructors. [#201, #1050]
• BlockPolicy<T>() constructor's doesTransactionFollowPolicy parameter became Func<Transaction<T>, BlockChain<T>, bool> on . [#1012]
• Added cacheSize optional parameter to BlockSet<T>() constructor. [#1013]
• Removed Address(SerializationInfo, StreamingContext) constructor. [#1022]
• Removed constructors from InvalidMessageException class. [#1021]

Backward-incompatible network protocol changes

• The message field RecentStates.StateReferences became to IImmutableDictionary<string, IImmutableList<HashDigest<SHA256>>> from IImmutableDictionary<Address, IImmutableList<HashDigest<SHA256>>>. [#912]
• The existing RecentStates message type (with the type number 0x0f) was replaced by a new RecentStates message type (with the type number 0x13). [#912]
• Added BlockHeader.TotalDifficulty property. [#666, #917]
• The existing Pong message type (with the type number 0x02) was replaced by a new Pong message type (with the type number 0x14). [#459, #919, #920, #930]
• The TimestampThreshold between Block<T>s was changed from 15 minutes to 15 seconds. [#922, #925]
• Swarm<T> became to have 5 more message types:
  • GetChainStatus (0x20) [#920, #930]
  • ChainStatus (0x24) [#920, #930, #1003, #1004]
  • GetBlockStates (0x22) [#946]
  • BlockStates (0x23) [#946]
  • DifferentVersion (0x30) [#949]
• Every message now contains app protocol version in its header. [#949]
• The existing BlockHeaderMessage message type (with the type number 0x0d) was replaced by a new BlockHeaderMessage message type (with the type number 0x0c). [#1003, #1004]
• Removed PreloadBlockDownloadFailEventArgs class. [#1002]
• Removed blockDownloadFailed parameter from Swarm<T>.PreloadAsync() method. Use SwarmOptions.BlockDownloadTimeout instead. [#1002]

Backward-incompatible storage format changes

• Added RawTransaction<T>.GenesisHash property. [#796, #878]
• Added BlockHeader.TotalDifficulty property. [#666, #917]

Added APIs

• Added Currency struct. [#861, #900, #954]
• Added FungibleAssetValue struct. [#861, #944, #954]
• Added AccountBalanceGetter delegate. [#861, #900, #954]
• Added TurnClient.BindProxies() method. [#756, #868]
• Added ActionEvaluation.Exception property. [#860, [#875]]
• Added InvalidTxGenesisHashException class. [#796, #878]
• Added InvalidBlockBytesLengthException class. [#201, #1050]
• Added CurrencyPermissionException class. [#861, #900]
• Added InsufficientBalanceException class. [#861, #900, #954]
• Added BlockChain<T>.GetBalance() method. [#861, #900]
• Added Block<T>.TotalDifficulty property. [#666, #917]
• Added Block<T>.BytesLength property. [#201, #1050]
• Added SwarmOptions class. [#926]
• Added PeerChainState struct. [#936]
• Added Swarm<T>.GetPeerChainStateAsync() method. [#936]
• Added Swarm<T>.LastMessageTimestamp property. [#964]
• Added Block<T>.PreEvaluationHash property. [#931, #935]
• Added BlockHeader.PreEvaluationHash property. [#931, #935]
• Added Transaction<T>.BytesLength property. [#201, #1050]
• Added HashDigest(ImmutableArray<byte>) constructor. [#931, #935]
• Incomplete block states became able to be handled in more flexible way. [#929, #934, #946, #954]
  • Replaced BlockChain<T>.GetState(Address, HashDigest<SHA256>?, bool) method with GetState(Address, HashDigest<SHA256>?, StateCompleter<T>) method. Specifying completeStates: true and false can be replaced by stateCompleter: StateCompleters<T>.Recalculate and StateCompleters<T>.Reject, respectively.
  • Replaced BlockChain<T>.GetBalance(Address, Currency, HashDigest<SHA256>?, bool) method with GetState(Address, Currency, HashDigest<SHA256>?, StateCompleter<T>) method. Specifying completeStates: true and false can be replaced by stateCompleter: FungibleAssetStateCompleters<T>.Recalculate and FungibleAssetStateCompleters<T>.Reject, respectively.
  • Added StateCompleter<T> delegate.
  • Added FungibleAssetStateCompleter<T> delegate.
  • Added StateCompleterSet<T> struct.
  • Added StateCompleters<T> static class.
  • Added FungibleAssetStateCompleters<T> static class.
  • Added Swarm<T>.GetTrustedStateCompleterAsync() method.
• Added IRenderer<T> interface. [#959, #963]
• Added IActionRenderer<T> interface. [#959, #967, #970]
• Added AnonymousRenderer<T> class. [#959, #963]
• Added AnonymousActionRenderer<T> interface. [#959, #967, #970]
• Added DelayedRenderer<T> class. [#980, #1029]
• Added DelayedActionRenderer<T> class. [#980, #1029]
• Added LoggedRenderer<T> class. [#959, #963]
• Added LoggedActionRenderer<T> interface. [#959, #967, #970]
• Added BlockChain<T>.Renderers property. [#945, #959, #963]
• Added BlockChain<T>.ActionRenderers property. [#959, #967, #970]
• Added Swarm<T>.AppProtocolVersion property. [#949]
• DefaultStore became to implement IBlockStatesStore. [#950]
• Added IStateStore interface. [#950]
• Added IBlockStatesStore interface. [#950]
• Added TrieStateStore class. [#939]
• Added ITrie interface. [#939, #1023]
• Added MerkleTrie class. [#939, #1023]
• Added IKeyValueStore interface. [#939]
• Added DefaultKeyValueStore class. [#939]
• Added CacheableKeyValueStore class. [#939]
• (Libplanet.RocksDBStore) RocksDBStore became to implement IBlockStatesStore. [#950]
• (Libplanet.RocksDBStore) Added RocksDBKeyValueStore. [#939]
• Added InvalidBlockStateRootHashException class. [#986]
• Added Block<T>.StateRootHash property. [#986]
• Added BlockHeader.StateRootHash property. [#986]
• Added MerkleTrieExtensions static class. [#1023]
• Added IAccountStateDelta.PreviousStateRootHash property to calculate states until previous action as state root hash. [#1030]
• Added UnexpectedlyTerminatedActionException.PreviousStateRootHash property. [#1032]

Behavioral changes

• Improved performance of Swarm<T>.
  • Multiplexed response and broadcast. [#858, #859]
  • Reduced internal delays. [#871, #879]
• Transaction<T>.Create(), Transaction<T>.EvaluateActions() and Transaction<T>.EvaluateActionsGradually() no longer throw UnexpectedlyTerminatedActionException directly. Instead, it records an exception to ActionEvaluations. [#860, #875]
• Added Transaction<T>.GenesisHash property. [#796, #878]
• Added IAccountStateDelta.UpdatedAddresses property contains asset updates besides state updates. [#861, #900]
• BlockChain<T>.Append() method became to throw InvalidBlockBytesLengthException if the given block's serialized bytes is longer than the limitation configured by IBlockPolicy.GetMaxBlockBytes(). [#201, #1050]
• BlockChain<T>.MineBlock() method became to cut off transactions to include to fit into the limitation configured by IBlockPolicy.GetMaxBlockBytes(). [#201, #1050]
• Swarm<T> became to ignore received transaction with different genesis hash. [#796, #878]
• Swarm<T> became to ignore invalid BlockHeaders immediately. [#898]
• Swarm<T>.PreloadAsync() became to clean up only temporary chains. [#902]
• BlockPolicy<T> became to validate Block<T>.TotalDifficulty property of a Block<T>. [#666, #917]
• Swarm<T> became to preload from peer that has the most difficult chain. [#459, #919]
• Swarm<T> became to promote the most difficult chain as a canonical chain instead of the longest chain. [#459, #919]
• Swarm<T>.BootstrapAsync() method became not to throw TimeoutException when it fails to connect to all neighbors. [#933]
• Swarm<T> became to respond to the messages with different app protocol version. [#949]
• Swarm<T>.PreloadAsync() became to execute the actions from the branchpoint rather than the genesis block when there is a branch point. [#991]
• BlockPolicy<T> became to validate Block<T>.StateRootHash property of a Block<T>. [#986]
• Swarm<T> became not to sync Block<T>s from the peers with different genesis block. [#1003, #1004]
• Swarm<T> became to ignore BlockHeaderMessage from the peers with different genesis block. [#1003, #1004]
• BlockChain<T> instead of BlockPolicy<T> became to validate Block<T>s to append so that even if an empty implementation of IBlockPolicy<T> is used Block<T>s are unable to be appended to BlockChain<T>. [#1010]
• BlockSet<T>[HashDigest<SHA256>] and BlockChain<T>.Genesis became cached so that they become faster to get. [#1013]
• Swarm<T>.PreloadAsync() became to do not render blocks. [#1029]

Bug fixes

• Fixed a bug that Swarm<T> had failed to receive a request from TURN relay connections. [#404, #871, #890]
• Fixed a bug where Swarm<T> had been terminated and never reconnected when it had been once disconnected from TURN (mostly due to sleep mode, etc.). [#909]
• Fixed a bug in which pre-computed state delivery had failed when a state key is not an Address when preloading. [#912]
• Fixed a bug where UnexpectedlyTerminatedException hadn't been serialized with BinaryFormatter. [#913]
• Fixed a bug where TurnClient hadn't applied cancellation token to its connections. [#916]
• Fixed a bug where BlockChain<T>.GetRawState() had overwritten block states without read lock. [#927]
• Fixed a bug that Swarm<T> had not respond to GetRecentStates message when the target block does not exist in the chain. [#941]
• Fixed a bug that Swarm<T>.StartAsync() had not worked after Swarm<T>.StopAsync() was once called. [#965]
• Fixed a bug that TurnClient had thrown InvalidOperationException when reconnecting. [#957, #972]
• Fixed a bug that Swarm<T> had not received block headers after failing to receive previous blocks. [#996]
• Fixed a bug that Swarm<T> had thrown InvalidGenesisBlockException when reorg its chain repeatedly. [#996]
• Fixed a bug that Swarm<T> had propagated invalid transactions. [#1043]

Static analyzer

• Introduced the Libplanet.Analyzers package, a Roslyn Analyzer, which checks if code has common mistakes prone to made with Libplanet-powered game apps, e.g., breaking determinism in IAction implementations. [#1034]

CLI tools

• The planet command became installable using npm. [#923, #982]
• Fixed a bug that ^H had not removed the rightmost character in passphrase prompts. [#983, #984]
• Added a new sub-command planet mpt. [#1023, #1026]
• Introduced a configuration file. It's placed in: [#1023, #1026]
  • Linux/macOS: $XDG_CONFIG_HOME/planetarium/cli.json
  • Windows: %AppData%\planetarium\cli.json

Version 0.9.5

Released on June 12, 2020.

• Fixed a bug that had not properly received block hashes after the chain had reorged. [#880, #905]

Version 0.9.4

Released on June 2, 2020.

• (Libplanet.RocksDBStore) Fixed a bug that RocksDBStore.DeleteChainId() method had thrown KeyNotFoundException when there's no such chain ID. [#891]
• (Libplanet.RocksDBStore) Fixed a bug that RocksDBStore had written logs into the incorrect context DefaultContext, not RocksDBStore the correct one. [#891]

Version 0.9.3

Released on May 29, 2020.

• Fixed a Swarm<T>.PreloadAsync() method's bug that had hanged in a state downloading block hashes and finally unexpectedly terminated when a peer's chain had gotten reorged. [#880, #884]

Version 0.9.2

Released on May 20, 2020.

• (Libplanet.RocksDBStore) Fixed a memory leak bug in RocksDBStore. [#870]

Version 0.9.1

Released on May 7, 2020.

• Fixed a bug where the canonical chain had changed if any actions had thrown an exception during Swarm<T>.PreloadAsync(). [#862]
• Fixed a Swarm<T>.PreloadAsync() method's bug that it had hung forever and raised InvalidOperationException. [#847, #864]

Version 0.9.0

Released on April 27, 2020.

Backward-incompatible API changes

• BaseStore class became to implement IDisposable. [#789]
• Removed IStore.DeleteIndex(Guid, HashDigest<SHA256>) method. [#802]
• Extension classes was renamed. However, it would not be affected if you have called it by using instance method syntax. [#803]
  • Renamed StunAddressExtension class to StunAddressExtensions.
  • Renamed BytesConvertExtension class to BytesConvertExtensions.
  • Renamed RandomExtension class to RandomExtensions.
  • Renamed AddressExtension class to AddressExtensions.
  • Renamed HashDigestExtension class to HashDigestExtensions.
  • Renamed NetMQFrameExtension class to NetMQFrameExtensions.
  • Renamed NetMQSocketExtension class to NetMQSocketExtensions.
  • Renamed SerializationInfoExtension class to SerializationInfoExtensions.
  • Renamed StoreExtension class to StoreExtensions.
• All parameters, fields, property, and method return values that had been represented as an Int32 became retyped to AppProtocolVersion. [#266, #815]
  • Swarm() constructor's parameter appProtocolVersion became AppProtocolVersion (was Int32).
  • Peer() and BoundPeer() constructors' parameter appProtocolVersion became AppProtocolVersion (was Int32).
  • Peer.AppProtocolVersion property became AppProtocolVersion (was Int32).
  • DifferentProtocolVersionEventArgs.ExpectedVersion and DifferentProtocolVersionEventArgs.ActualVersion properties became AppProtocolVersion (was Int32).
  • Removed DifferentAppProtocolVersionException class.
• Swarm() constructor's EventHandler<DifferentProtocolVersionEventArgs> differentVersionPeerEncountered = null parameter became replaced by DifferentAppProtocolVersionEncountered differentAppProtocolVersionEncountered = null parameter. [#266, #815]
• Added IEnumerable<PublicKey> trustedAppProtocolVersionSigners = null parameter to Swarm() constructor. [#266, #815]
• Removed DifferentProtocolVersionEventArgs class. [#266, #815]
• Removed createdAt parameter from Swarm() constructor. [#838]
• Replaced BlockChain<T>.StageTransactions() with .StageTransaction() that receives only one transaction. [#820]
• Replaced BlockChain<T>.UnstageTransactions() with .UnstageTransaction() that receives only one transaction. [#820]
• Added IBlockPolicy.DoesTransactionFollowPolicy() method which is a method to determine if a transaction follows the block policy. [#827]

Backward-incompatible network protocol changes

• The existing BlockHashes message type (with the type number 0x05) was replaced by a new BlockHashes message type (with type number 0x0e) in order to include an offset block index besides block hashes so that a receiver is able to determine their block indices too. [#707, #798]
• Peer became to have 3 more fields to represent the whole fields of AppProtocolVersion, which is newly introduced. [#266, #815]
• The existing RecentStates message type (with the type number 0x0c) was replaced by a new RecentStates message type (with type number 0x0f) in order to compress its states. [#700, #850]

Added APIs

• Added AddressExtensions.ToAddress(this PrivateKey) overloaded extension method. [#825]
• Added BlockHashDownloadState class, a subclass of PreloadState. [#707, #798]
• Added BlockVerificationState class, a subclass of PreloadState. [#798]
• Added AppProtocolVersion struct. [#266, #815]
• Added IKeyStore interface. [#831]
• Added Web3KeyStore class. [#831]
• Added BlockDigest struct. [#785]
• Added BlockHeader struct. [#785]
• Added IStore.GetBlockDigest(HashDigest<SHA256>) method. [#785]
• Added Block<T>.ToBlockDigest() method. [#785]
• Added ByteArrayExtensions class. [#803]
• Added IStore.PruneBlockStates<T>(Guid, Block<T>) method. [#790]
• Added DifferentAppProtocolVersionEncountered delegate. [#266, #815]
• Added Swarm<T>.TrustedAppProtocolVersionSigners property. [#266, #815]
• Added Peer.IsCompatibleWith() method. [#266, #815]
• Added TxViolatingBlockPolicyException class. [#827]
• Added KeyStoreException class. [#831]
• Added NoKeyException class. [#831]

Behavioral changes

• BlockChain.MineBlock() method became to ignore transactions having lower nonce than the expected nonce in the chain. [#791]
• Swarm<T>.PreloadAsync() and Swarm<T>.StartAsync() became to download only a list of block hashes first and then download blocks from simultaneously multiple peers. [#707, #798]
• Improved performance of Swarm<T> by preventing unnecessary task creation. [#817, #837]
• Improved performance of Swarm<T>.PreloadAsync() by parallelizing connections. [#846]
• Improved response throughput of Swarm<T>. [#849]

Bug fixes

• Swarm<T> became not to sync the same Block<T>s or Transaction<T>s multiple times. [#784]
• Fixed a Swarm<T>'s bug that had broadcasted a message to its source peer when the number of peers is not enough (less than the minimum number). [#788]
• Fixed a bug where BlockChain.MineBlock() had produced an invalid block when there is any staged transaction which has lower nonce than the expected nonce, that means, shares an already taken nonce by the same signer. [#791]
• Fixed a Swarm<T>.PreloadAsync() method's bug that temporary chain IDs in the store had been completely cleaned up in some corner cases if cancellationToken was requested. [#798]
• Fixed a bug where Swarm<T> had crashed if it received invalid Transaction<T> from the nodes. [#820]
• Fixed a bug where Swarm<T> hadn't reported IProgress<PreloadState>s correctly.[#839]
• Fixed a Swarm<T>.PreloadAsync() method's bug that it had hung forever when a block failed to be fetched due to an unexpected inner exception. [#839]
• Fixed a bug where actions had been evaluated twice when receiving blocks. [#843, #844]
• Fixed OverflowException being thrown when a passphrase containing any non-ASCII characters was passed to Pbkdf2.Derive() method or ProtectedPrivateKey.Protect() method. [#845]

CLI tools

• Added the planet command and its alias dotnet planet.

Version 0.8.0

Released on February 4, 2020.

Backward-incompatible API changes

• The internal representation for state keys became string (was Address). [#368, #774]
  • The return type of IStore.GetBlockStates() method became IImmutableDictionary<string, IValue> (was AddressStateMap, which was removed too). [#368, #774]
  • The type of the second parameter of IStore.SetBlockStates() method became IImmutableDictionary<string, IValue> (was AddressStateMap, which was removed too). [#368, #774]
  • The second parameter of IStore.IterateStateReferences() method became string key (was Address address). [#368, #774]
  • The second parameter of IStore.StoreStateReference() method became IImmutableSet<string> keys (was IImmutableSet<Address> addresses). [#368, #774]
  • IStore.ListAddresses() method was replaced by IStore.ListStateKeys() method. [#368, #774]
• Added Swarm<T>.FindSpecificPeer() method to find a specific peer given the address. [#570, #580]
• Removed LiteDBStore class. Use DefaultStore instead. [#662]
• Removed BlockChain<T>.Contains(TxId) method. Use IStore.ContainsTransaction(TxId) instead. [#676]
• Renamed BlockChain<T>.Contains(HashDigest<SHA256>) method to BlockChain<T>.ContainsBlock(HashDigest<SHA256>). [#678]
• Removed BlockChain<T>.Contains(Block<T>) method. [#678]
• Changed semantics of BlockChain<T>.ContainsBlock(HashDigest<SHA256>) method and BlockChain<T>[HashDigest<SHA256>] indexer as lookups only the current chain, not entire storage. [#678]
• Added IStore.ContainsBlock(HashDigest<SHA256>) method. [#678]
• Removed AddressStateMap class. [#98, #368, #692, #774]
  • The return type of BlockChain<T>.GetState() method became IValue (was AddressStateMap).
  • The return type of IStore.GetBlockStates() method became IImmutableDictionary<string, IValue> (was AddressStateMap).
  • IStore.SetBlockStates() method became to take IImmutableDictionary<string, IValue> instead of AddressStateMap.
• Swarm<T>.PreloadAsync() method and Swarm<T>.StartAsync() method became to take preloadBlockDownloadFailed event handler as an argument. [#694]
• Added the genesisBlock parameter to BlockChain<T>() constructor. [#688]
• Removed StateReferenceDownloadState class. [#703]
• Removed BlockStateDownloadState class. [#703]
• Removed TxReceived and BlockReceived AsyncAutoResetEvents from Swarm<T>. [#705, #725]
• Added workers optional parameter into Swarm<T>() constructor. [#613, #727]
• Block<T> class became not to implement ISerializable. [#751]
• Transaction<T> class became not to implement ISerializable. [#751]
• Block<T>.ToBencodex() became to return Bencodex.Types.Dictionary. [#751]
• Transaction<T>.ToBencodex() became to return Bencodex.Types.Dictionary. [#751]
• Removed Block<T>.FromBencodex(byte[]) method. [#751]
• Removed Transaction<T>.FromBencodex(byte[]) method. [#751]
• Block<T>.ToBencodex() became to take no arguments. [#749, #757]
• Removed Swarm<T>.BroadcastBlocks(IEnumerable<Block<T>>) method. [#764]
• StoreExtension.LookupStateReference<T>() method was replaced by IStore.LookupStateReference<T>() method. [#722, #774]

Backward-incompatible network protocol changes

• Added long-typed offset parameter to RecentStates and GetRecentStates messages. [#703]
• Added int-typed iteration parameter to RecentStates message. [#703]
• Added BlockHeaderMessage message. [#764]

Backward-incompatible storage format changes

• The introduced DefaultStore is incompatible at the file-level with the LiteDBStore which had existed. DefaultStore became to take a directory instead of a single file, and it consists of multiple subdirectories and a LiteDB file for indices. [#662, #680]

Added APIs

• Added DefaultStore class to replace LiteDBStore. [#662]
• Added IStore.ListAllStateReferences<T>() method. [#701, #703]
• Added IStore.ListStateKeys() method to replace IStore.ListAddresses() method. [#368, #774]
• Added IStore.LookupStateReference<T>() method to replace StoreExtension.LookupStateReference<T>() method. [#368, #722, #774]
• Added BlockChain<T>.Genesis property. [#688]
• Added BlockChain<T>.MakeGenesisBlock() static method. [#688]
• Added InvalidGenesisBlockException class. [#688]
• Added StateDownloadState class, a subclass of PreloadState, which reports state preloading iteration progress. [#703]
• Added PeerDiscoveryException class which inherits SwarmException class. [#604, #726]
• Added Swarm<T>.Peers property which returns an enumerable of peers in Swarm<T>'s routing table. [#739]
• Added Block<T>.Serialize() method which returns byte[]. [#751]
• Added Transaction<T>.Serialize() method which returns byte[]. [#751]
• Added Block<T>(Bencodex.Types.Dictionary) constructor. [#751]
• Added Transaction<T>(Bencodex.Types.Dictionary) constructor. [#751]
• Added Block<T>.Deserialize(byte[]) method. [#751]
• Added Transaction<T>.Deserialize(byte[]) method. [#751]
• Added StoreExtension.Copy(this IStore, IStore) extension method. [#753]
• Added a HashDigest<SHA256>?-typed TxHash property which digests all transactions in the block to Block<T> class. [#749, #757]
• Added CryptoConfig class. [#758]
• Added ICryptoBackend class. [#758]
• Added DefaultCryptoBackend class. [#758]
• Added Swarm<T>.BroadcastBlock(Block<T>) method. [#764]
• Added Swarm<T>.PeerStates property. [#772]
• Added PeerState class which represents a Peers state in the routing table. [#772]
• Added Swarm<T>.CheckAllPeersAsync() method. [#772]

Behavioral changes

• Swarm<T> became to compare only peer's addresses instead of public keys to determine if a peer is in routing table or not. [#665]
• When Swarm<T>.PreloadAsync() method fails to download blocks, Swarm<T> became to call preloadBlockDownloadFailed event handler taken as an argument. If the event handler is not present, Swarm<T> throws SwarmException. [#694]
• Swarm<T>.PreloadAsync() became not to sync state references and block states at once. [#703]
• Swarm<T> became to print less logs on debug level during sending states. [#706]
• Increased Swarm<T>'s network timeout value, in order to be stable a high latency internet connection. [#709]
• Swarm<T>.BootstrapAsync() became to report PeerDiscoveryException instead of SwarmException directly. [#604, #726]
• BlockChain<T>.Append() became to unstage the staged Transaction<T>s that have lower nonce than the highest nonce of the same signer's transactions in the same chain, since these virtually never become valid. [#721, #728]
• Swarm<T> became not to fill blocks if received block hashes are continuous. [#732]
• Swarm<T> became to can process more requests at once by creating TURN relaying proxy concurrently. [#744]
• Swarm<T> became to throw InvalidGenesisBlockException when receiving block from the nodes that have a different genesis block. [#746]
• Swarm<T> became to distinguish the starting stages clearly. In other words, Swarm<T>.StartAsync() became not to call Swarm<T>.PreloadAsync(). [#735, #760]
• The hash of Block<T> has changed due to the change in the method of serialization. [#762]
• Swarm<T> became to ignore broadcasted block that has lower index than the current tip. [#764]
• The way Swarm<T> chose peers to spread messages has changed. [#765, #767]
  • If there are less than 10 peers in the routing table, select all peers.
  • If there are more than 10 peers in the routing table, choose one from each bucket, and if the number is less than 10, then select an additional peers so that the total is 10.

Bug fixes

• Fixed a bug where the canonical chain could be deleted if Swarm<T> failed to download blocks due to network connection. [#675]
• Fixed bug that re-download block from scratch in preloading. [#685]
• Fixed a bug where state references become outdated if a chain is forked and then adding existing blocks into it. [#704]
• Fixed a bug where Swarm<T> had exhausted all available sockets. [#709]
• Fixed a bug where Swarm<T> had infinitely repeated failed requests. [#709]
• Fixed a bug where Swarm<T> hadn't stopped properly. [#709]
• Fixed a bug where Swarm<T>.BootstrapAsync() had stopped due to trivial (recoverable) TimeoutExceptions. [#715, #716]
• Fixed a bug where BlockChain<T>.GetNextTxNonce() had returned invalid tx nonce. [#718]
• Fixed a bug where mined transactions were staged again. [#719]
• Fixed a bug where Block<T>.Hash property, Block<T>.Mine() method, Block<T>.FromBencodex() method, Block<T>.ToBencodex() method, Transaction<T>.Id property, Transaction<T>.Signature property, Transaction<T>.Create() method, Transaction<T>.FromBencodex() method, and Transaction<T>.ToBencodex() method had been non-deterministic on some CultureInfo.CurrentCulture (e.g., ar_SA, fr_FR, th_TH) so that it had caused network protocol incompatibilities. [#734]
• Fixed a bug where the states became empty between the tip of the peer to receive the states and the tip of the downloaded block. [#736]
• Fixed a bug where Swarm<T>.StartAsync() had thrown NullReferenceException when host parameter is present on the outside of NAT. [#744]
• Fixed a bug where Swarm<T> had failed to request a TURN relay when it has an IPv6 address. [#744]
• Fixed a bug where DefaultStore had invalid state references cache after fork. [#759]
• Fixed a bug where BlockChain<T> had rendered and evaluated actions in the genesis block during forking. [#763]
• Fixed a Swam<T>'s bug that some Transaction<T>s had become excluded from mining Block<T>s after reorg from α to β where a Transaction<T> was once included by a Block<T> (α) and not included by an other Block<T> (β) for the same Index due to the latency gap between nodes. [#775]
• Fixed a bug where TransactionSet and BlockSet has halt whole process when run Trace.Assert(). [#806, #833]

Version 0.7.0

Released on November 8, 2019.

Backward-incompatible interface changes

• Renamed minValue/maxValue parameters to lowerBound/upperBound of IRandom.Next() methods. [#555, #558]
• Renamed IStore.IterateIndex() method to IterateIndexes(). [#462, #560]
• Swarm<T> class became to implement IDisposable again and should be disposed to clean up its internal resources. [#485]
• IStore.IterateStateReferences() method became to receive highestIndex, lowestIndex, and limit parameters. [#447, #545]
• Reworked BlockChain<T>.GetStates() into GetState() which takes only one Address instead of IEnumerable<Address>. [#510, #563]
• Types of IAction.PlainValue and states became restricted to Bencodex.Types.IValue. [#541, #552]
  • IAction.LoadPlainValue(IImmutableDictionary<string, object>) method became replaced by LoadPlainValue(IValue).
  • AccountStateGetter became to return IValue, not object.
  • Added BencodexExtension static class.
• Removed BlockChain<T>.Blocks. [#409, #583]
• Removed BlockChain<T>.Transactions. [#409, #583]
• Removed the linger parameter from the Swarm<T>() constructor, and added the waitFor parameter to Swarm<T>.StopAsync() method instead. [#581]
• Removed the dialTimeout parameter from the Swarm<T>() constructor, and added it to Swarm<T>.PreloadAsync() & Swarm<T>.StartAsync() methods. [#581]
• Removed broadcast parameter from BlockChain<T>.MakeTransaction() method. [#609]
• BlockChain<T> does not implement IReadOnlyList<T> anymore. [#630]
  • Added BlockChain<T>.Count property. [#630]
  • Removed BlockChain<T>.LongCount() method. [#630]
  • Removed BlockChain<T>.Validate() method. [#630]
  • Removed BlockChain<T>.GetEnumerate() method. [#630]
  • Removed BlockPolicyExtension.ValidateBlocks() method. [#630]
  • IBlockPolicy<T>.GetNextBlockDifficulty() method became to receive BlockChain<T> instead of IReadOnlyList<Block<T>>. [#630]
  • IBlockPolicy<T>.ValidateNextBlock() method became to receive BlockChain<T> instead of IReadOnlyList<Block<T>>. [#630]

Added interfaces

• Added ProtectedPrivateKey class. [#577, #614]
• Added IncorrectPassphraseException class. [#577, #614]
• Added MismatchedAddressException class. [#577, #614]
• Added KeyJsonException abstract class. [#577, #614]
• Added InvalidKeyJsonException class. [#577, #614]
• Added UnsupportedKeyJsonException class. [#577, #614]
• Added ICipher interface. [#577, #614]
• Added Aes128Ctr class. [#577, #614]
• Added IKdf interface. [#577, #614]
• Added Pbkdf2 class. [#577, #614]
• Added Scrypt class. [#642, #654]
• Added BlockChain<T>.LongCount() method. [#575]
• Added BlockChain<T>[HashDigest<T>] indexer. [#409, #583]
• Added BlockChain<T>.Contains(HashDigest<T>) method. [#409, #583]
• Added BlockChain<T>.GetTransaction(TxId) method. [#409, #583]
• Added BlockChain<T>.Contains(TxId) method. [#409, #583]
• Added ByteUtil.Hex(ImmutableArray<byte>) overloaded method. [#614]
• Added BlockChain<T>.Contains(Block<T>) method. [#630]
• Added BlockDownloadState.SourcePeer property. [#636]

Behavioral changes

• Changed to send Pong before updating the message sender to the routing table when Ping is received. [#566]
• Improved performance of StoreExtension.LookupStateReference<T>() method. [#447, #545]
• Added .NET Core 2.2 as a targeted framework. [#209, #561]
• TurnClient.AcceptRelayedStreamAsync() became to ignore disconnected connections. [#469]
• Swarm<T>.PreloadAsync() became to ignore peers with lower tip. [#592]
• Swarm<T> became to validate only stale peers. [#568, #593]
• Swarm<T> became not to check cached peers immediately after removing peers from its routing table. Instead, it checks cached peers periodically. [#608]
• Marked Address and HashDigest as readonly. [#610]
• IceServer.CreateTurnClient() became to throw ArgumentException when received invalid url. [#622]
• Swarm<T> became to update peer table when receiving messages that are not related with Kademlia protocol. [#594, #627]
• Swarm<T> became not to check least recently used peer every time when new peer is fetched. [#627]
• IAction became guaranteed that the given IActionContext.PreviousStates.GetState() never throws IncompleteBlockStatesException. Instead, now it may calculate the incomplete states from the beginning if necessary. [#645]
• IStore.PutBlock<T>() became to do nothing when it takes the Block<T> more than once. [#647]
• Swarm<T>.PreloadAsync() became to try downloading blocks from all neighbor peers, even if any peer among them is unavailable to send blocks. [#636]

Bug fixes

• Fixed a bug where Swarm<T> had tried to update a peer infinitely when the peer is evicted from its table. [#566]
• Fixed a bug where Swarm<T>.AppendBlocksAsync() re-requests blocks that already received when blockchain is empty. [#550, #562]
• Fixed a bug that Swarm<T> had thrown SocketException with a message Operation on non-blocking socket would block. [#405, #485]
• Fixed a bug that accessed all blocks from the genesis block when a swap occurred. [#575]
• Fixed a bug that Swarm<T> had thrown InvalidBlockIndexException during synchronizing with other reorganized peer. [#528, #576]
• Fixed a bug where Swarm<T> does not render actions in blocks which are filled from other peers. [#579]
• Fixed a bug where Swarm<T> renders actions in same block multiple times when reorg happens. [#579]
• LiteDBStore became to guarantee atomicity of storing blocks. [#584]
• Fixed a bug that BlockChain<T> had appended a block even if fails to evaluate. [#591]
• Fixed a bug where Swarm<T> hadn't removed stale peers. [#568, #593, #602]
• Fixed a bug that TurnClient had thrown IOException when accepting connection through a TURN relay server. [#453, #599]
• Fixed a bug that KeyNotFoundException occurred when sending a message through the TurnClient.
• Fixed a bug where BlockChain<T>.GetNextTxNonce only returned the same nonce when transactions with an old nonce were staged. [#637]
• Fixed a bug that BlockChain<T> had reset when Swarm<T>.PreloadAsync() fails. [#644]
• Fixed bug that whole processes could halt when received an invalid type of message. [#628, #641]
• Fixed a bug that received blocks could not be processed if a branch point is a stale block. [#655]

Version 0.6.0

Released on October 1, 2019.

Backward-incompatible interface changes

• BlockChain<T>.MineBlock() is now async and became to throw OperationCanceledException if BlockChain<T>'s tip index is changed while mining. [#460, #517]
• Users became able to give a cancellation token to Block<T>.Mine() and Hashcash.Answer() to cancel the operation. [#460, #517]
• Replaced UnexpectedlyTerminatedTxRehearsalException with UnexpectedlyTerminatedActionException. [#498]
• The following methods became to throw UnexpectedlyTerminatedActionException with having its InnerException during actions being evaluated if any action of them throws an exception: [#498]
  • Transaction<T>.EvaluateActions()
  • Transaction<T>.EvaluateActionsGradually()
  • Block<T>.EvaluateActionsPerTx()
  • Block<T>.Evaluate()
  • BlockChain<T>.GetStates(completeStates: true)
• The concept of "namespaces" in IStore was replaced by "chain IDs" to be consistent with BlockChain<T>. [#483, #486]
  • Renamed IStore.ListNamespaces() method to ListChainIds().
  • Renamed IStore.DeleteNamespace() method to DeleteChainId().
  • Renamed IStore.GetCanonicalNamespace() method to GetCanonicalChainId().
  • Renamed IStore.SetCanonicalNamespace(string) method to SetCanonicalChainId(Guid).
  • Replaced namespace/sourceNamespace/destinationNamespace parameters taking string of methods in IStore and StoreExtension with chainId/sourceChainId/destinationChainId taking Guid.
  • Renamed NamespaceNotFoundException to ChainIdNotFoundException.
  • Replaced NamespaceNotFoundException(string, string) constructor with ChainIdNotFoundException(Guid, string) constructor.
  • Replaced NamespaceNotFoundException.Namespace property with ChainIdNotFoundException.ChainId property.
• IStore.StoreStateReference<T>(string, IImmutableSet<Address>, Block<T>) method became replaced by StoreStateReference(Guid, IImmutableSet<Address>, HashDigest<SHA256>, long) method so that it takes hash and index of a block instead of an entire block. [#420]
• Added IStore.ForkBlockIndexes() method. [#420]
• Removed addressesToStrip parameter from IStore.ForkStateReferences<T>() method. [#454, #467, #509, #522]
• Removed the concept of "staged transactions that should not be broadcasted," because its primary usage had been to make a transaction of a reward action for a candidate for block miner, and the case became achieved through IBlockPolicy<T>.BlockAction property which was introduced at 0.5.0. All staged transactions became broadcasted. [#319, #470]
  • BlockChain<T>.StageTransactions(IDictionary<Transaction<T>, bool>) method became replaced by StageTransactions(IImmutableSet<Transaction<T>>).
  • Removed toBroadcast parameter from IStore.IterateStagedTransactionIds(bool) method.
  • IStore.StageTransactionIds(IDictionary<TxId, bool>) method became replaced by StageTransactionIds(IImmutableSet<TxId>().
• Removed Swarm<T>.AddPeersAsync() method. To connect with seed peers, use Swarm<T>.BootstrapAsync() method instead. [#353]
• Peer with endpoints should be typed as BoundPeer which is inherited from Peer. [#353]
• Removed IActionContext.NewGuid() method. To get a randomly generated Guid, use RandomExtension.GenerateRandomGuid() which implements RFC 4122 instead. [#508]

Added interfaces

• Added BlockChain<T>.TipChanged event which is invoked with an argument of BlockChain<T>.TipChangedEventArgs when BlockChain<T>.Tip is changed. [#517, #526]
• Added BlockChain<T>.TipChangedEventArgs class. [#526]
• Added Swarm<T>.BootstrapAsync() method to connect with seed peers. [#353]
• Added RandomExtension static class. [#508]
• TxId class became to implement IComparable<TxId> and IComparable interfaces. [#244, #511]

Behavioral changes

• Swarm<T> now broadcasts transactions as soon as new transactions are received. [#463, #496]
• Swarm<T> now ignores block hashes which already exists. [#461, #484]
• Swarm<T>.PreloadAsync() method became to download precalculated states of blocks from a likely branchpoint instead of a genesis block from a trusted peer (i.e., trustedStateValidators) where there are branches between peers. [#465, #481]
• Swarm<T>'s internal GetRecentStates message became to take BlockLocator, an internal data type to approximates a path of a chain of blocks for heuristics to search a likely branchpoint, instead of HashDigest<SHA256>. [#465, #481]
• NetMQ instances are now initialized at Swarm<T>.StartAsync() instead of Swarm<T>(). [#353]
• Peers now connected via Kademlia protocol. Peers are now selectively connected to each peer. [#353]
• TxIds and Blocks are now broadcasted to selected peers from routing table of the host peer. [#353]
• PolymorphicAction<T>.ToString() method became to show the runtime type of its InnerAction for the sake of easier debugging. [#512]
• The order of Block<T>.Transactions became to be determined by both a Block<T>.Hash and a Transaction<T>.Id, so that signers cannot predict the order of transactions in a block before it's mined. If there are multiple transactions signed by the same signer in a block these transactions become grouped together and the order is determined by a Block<T>.Hash and a fingerprint derived from all these transactions, and transactions in each group (per signer) are ordered by Transaction<T>.Nonce. [#244, #355, #511, #520]
• LiteDBStore() became to create the database in memory if the path parameter is null. [#521]

Bug fixes

• Fixed a bug that Swarm<T> hadn't released its TURN related resources on Swarm<T>.StopAsync(). [#450]
• Fixed a bug that IActionContext.Random had been possible to generated equivalent results between actions of different transactions in a Block<T>. [#519]
• Fixed a bug where a forked chain would not be deleted when an exception occurred during fetching block from other peers. [#527, #537, #540]

Version 0.5.3

Released on September 9, 2019.

Bug fixes

• Fix bug where IAccountStateDelta.GetState() hadn't returned proper state when the block action is evaluated. [#500]

Version 0.5.2

Released on August 29, 2019.

Bug fixes

• Fixed a bug that Swarm<T>.PreloadAsync() method had thrown LiteException (or other exception depending on IStore), which indicates a state reference is duplicate, where trustedStateValidators is present and a miner tries to download precalculated states from a trusted peer. [#465, #474]
• Fixed a bug tag Swarm<T>.StartAsync() sometimes had thrown an exception from IStore (e.g., NullReferenceException) during broadcasting transactions. [#352, #476]

Version 0.5.1

Released on August 28, 2019.

Bug fixes

• Fixed a bug that ArgumentNullException had been thrown when a blockchain, which consists of incomplete states (i.e., precalculated states downloaded from trusted peers), encounters a new branch so that reorg is made. [#454, #466]
• Fixed a bug that unnecessarily received all blocks in multiple miner situations. [#457, #468]

Version 0.5.0

Released on August 22, 2019.

Backward-incompatible interface changes

• Added IStore.GetBlockIndex() method. [#385]
• StoreExtension.LookupStateReference<T>() method became to return Tuple<HashDigest<SHA256>, long> which is a nullable tuple of Block<T>.Hash and Block<T>.Index. [#350]
• Added IBlockPolicy<T>.BlockAction property. [#319, #367]
• Removed the type parameter of ActionEvaluation. [#319, #367]
• ActionEvaluation.Action became to IAction type. [#319, #367]
• LiteDBStore() constructor became to have a new option named flush and turned on by default. [#387, LiteDB #1268]
• LiteDBStore() constructor became to have a new option named readOnly and turned off by default. [#434]
• BaseIndex.ContainsKey() method became abstract. [#390]
• BlockDownloadState.TotalBlockCount and BlockDownloadState.ReceivedBlockCount became to Int64 type. [#396, #399]
• IStore.IterateIndex() method became to receive offset and limit parameters. [[#425]]
• Added IStore.GetCanonicalNamespace() method. [#426]
• Added IStore.SetCanonicalNamespace() method. [#426]
• Removed IRandom.NextDouble() method, because floating-point arithmetics, which is underspecified, likely introduce indeterminism. [#410, #419]
• Added IActionContext.NewGuId() method. [#371, #439]
• Address(byte[]) became to throw ArgumentNullException instead of NullReferenceException. [#443]
• Removed FileStore class. [#446]

Added interfaces

• Added trustedStateValidators option to Swarm<T>.PreloadAsync() method. If any peer in this set is reachable and there is no built up blockchain in a current node, Swarm<T> receives the latest states of the major blockchain from that trusted peer, which is also calculated by that peer, instead of autonomously calculating the states from scratch. Note that this option is intended to be exposed to end users through a feasible user interface so that they can decide whom to trust for themselves. [#272, #343]
• Added StoreExtension.ListAllStateReferences(this IStore, string, HashDigest<SHA256>?, HashDigest<SHA256>?) extension method. [#363, #384, #385]
• Address class became to implement IComparable<Address> and IComparable interfaces. [#363]
• Added BlockChain<T>.BlockHashes property. [#389]
• Swarm<T>.PreloadAsync(IProgress<PreloadState>, IImmutableSet<Address>, CancellationToken) became to report progress for all phases. [#397, #400]
• Added PreloadState, ActionExecutionState, StateReferenceDownloadState, and BlockStateDownloadState classes to cover all phases in the entire preloading process. [#397, #400]
• Added Address(ImmutableArray<byte>) constructor. [#442, #443]

Behavioral changes

• BlockChain<T>.PreloadAsync() method became to omit rendering of IActions in the preloaded behind blocks. [#272, #343]
• Swarm<T> became to have two more message types: GetRecentStates (0x0b) and RecentStates (0x0c). [#272, #343]
• BlockChain<T>.MineBlock() and BlockChain<T>.GetNextTxNonce() methods became to ignore transactions that didn't follow Transaction<T>.Nonce sequentially and treat them as pendings. [#365]
• BlockChain<T> became to evaluate IBlockPolicy<T>.BlockAction and set the state when a block is appended to the chain. [#319, #367]
• BlockSet<T>.ContainsKey() and TransactionSet<T>.ContainsKey() methods became O(1) time complexity through omitting iteration and relying own retrieve implementations. [#390]
• The way LiteDBStore stores state references became efficient, but the file-level backward compatibility was also broken. [#395, #398]
• Swarm<T>.PreloadAsync() method became to report a block downloading progress with the total number of blocks to download in the entire batch, instead of the window size of a chunk (i.e., 500). [#396, #399]
• Swarm<T>.PreloadAsync() became to get the first parameter, progress, which accepts IProgress<PreloadState>. [#397, #400]
• BlockHashes messages became to contain one more higher hash. [#408, #445]
• Swarm<T>.PreloadAsync() became safe from data corruption even if a preloading process suddenly gets shutdown. [#417]
• FileStore and LiteDBStore became to guarantee atomicity of storing transactions. [#413]
• IStore.PutTransaction<T>() became to do nothing when it takes the Transaction<T> more than once. [#413]
• BlockChain<T>.Swap() became to omit common block finding when render is false. [#423]
• PrivateKey(byte[]) constructor became to check validity. [#438]

Bug fixes

• Fixed a bug where the LiteDBStore.IterateStagedTransactionIds() returns duplicated transaction ids. [#366]
• Fixed a bug that NullReferenceException occurred when serializing default Address. [#369]
• Removed unnecessary mutex in Swarm<T> to avoid continuous delays in peer registration in some situations. [#375]
• Fixed a bug that TurnClient had thrown KeyNotFoundException and IOException on startup. [#377, #378]
• Fixed a LiteDBStore bug that blocks or transactions had got corrupted sometimes. Instead, LiteDBStore.GetTransaction() became possible to return null even for already stored transactions, and for that case, a warning will be logged through Serilog. [#386, #387, LiteDB #1268]
• Fixed a bug that NetworkStreamProxy.StartAsync() hadn't stopped properly when the connection had reset by a remote peer. [#414]
• Fixed a bug that Swarm<T> had hung forever after a remote peer had disconnected while receiving. [#416]
• Fixed a bug that Swarm<T>.PreloadAsync() had been processed even if there is no appropriate peer. [#418]
• Fixed a bug that TURN-related tasks hadn't restarted automatically when an exception occurred. [#422]
• Fixed a bug that TURN relay connection had disconnected when preloading took a long time. [#424]

Version 0.4.1

Released on July 11, 2019.

Bug fixes

• Fixed a bug where the BlockChain<T>.GetStates() method had not returned the latest state when there are multiple addresses. [#346]

Version 0.4.0

Released on July 8, 2019.

Backward-incompatible interface changes

• Peer.AppProtocolVersion became nullable to represent Peer whose version is unknown. [#280]
• Added IStore.ListAddresses() method. [#272, #285]
• Added IStore.ListTxNonces() method. [#272, #309, #310]
• Removed BlockChain<T>.GetNonce() method. [#294]
• BlockChain<T>.StageTransactions became to receive IDictionary<Transaction<T>, bool> instead of ISet<Transaction<T>>. [#274, #297]
• IStore.StageTransactionIds() method became to receive IDictionary<TxId, bool> instead of ISet<TxId>. [#274, #297]
• IStore.IterateStagedTransactionIds() method became to receive bool toBroadcast which is whether to iterate only the TxId set to broadcast. [#274, #297]
• Swarm<T>.StartAsync() method became to receive broadcastTxInterval (or millisecondsBroadcastTxInterval) parameter. [#274, #297]
• IStore became to treat a "tx nonce" mere a long integer instead of a stack of block hashes. [#272, #307, #309, #310]
  • IStore.IncreaseTxNonce<T>(string, Block<T>) method was replaced by IStore.IncreaseTxNonce(string, Address, long) method.
  • Removed IStore.ForkTxNonce() method.
  • FileStore became to occupy fewer bytes for storing tx nonces. This change broke file-level backward compatibility.
• IStore became possible to look up multiple state references in a stack. [#272, #307]
  • Removed IStore.LookupStateReference<T>() method. Instead, a newly added static class StoreExtension provides an extension method of the same name.
  • Added IStore.IterateStateReferences() method.
• Swarm became to have type parameter T to represent an action type as like as BlockChain<T>. [#324]
• Swarm<T> constructor became to receive BlockChain<T>. [#324]
• Methods in Swarm<T> that had taken a parameter of BlockChain<T> type became to neither longer take BlockChain<T> nor a generic method. Because the Swarm<T> constructor takes it instead. [#324]
• Swarm<T> does not implement ICollection<Peer> anymore. [#326]
• Added IStore.DeleteNamespace() method. [#329]
• Removed the id parameter from the BlockChain<T> constructor, and it became to automatically detect an appropriate BlockChain<T>.Id. [#279, #332]

Added interfaces

• Added LiteDBStore backend that uses LiteDB under the hood. [#269]
• All *Async() methods belonging to TurnClient class became to have cancellationToken option. [#287]
• Added a Peer constructor omitting appProtocolVersion parameter to create a Peer whose version is unknown. [#280]
• Added IncompleteBlockStatesException class. [#272, #285]
• Added completeStates option to BlockChain<T>.GetStates() method. [#272, #285]
• Added BlockChain<T>.MakeTransaction(PrivateKey, IEnumerable<T>, IImmutableSet<Address>, DateTimeOffset?) method. [#294]
• Added BlockChain<T>.GetNextTxNonce() method which counts staged transactions too during nonce computation. [#270, #294]
• Added StoreExtension static class. [#272, #307]
• Added Swarm<T>.BlockChain property. [#272, #343]

Behavioral changes

• BlockChain<T>.GetStates() method became to throw IncompleteBlockStatesException if its Store lacks the states of a block that a requested address lastly updated. [#272, #285]
• A message Swarm<T> makes became to have multiple blocks within it, which means round trips on the network are now much reduced. [#273, #276]
• Message.Block has been replaced by Message.Blocks and the magic number has been changed to 0x0a. [#276]
• Improved performance of Swarm<T>'s response time to GetBlockHashes request messages. [#277]
• Added IPv6 support to Libplanet.Stun.StunAddress. [#267, #271]
• IStore.GetBlockStates() became able to return null to represent an absence of states (i.e., incomplete states). [#272, #285]
• Swarm<T> became to broadcast staged Transactions periodically so that game apps no more need to maintain their own thread to broadcast staged transactions. [#274, #297]
• Previously, Swarm<T> had sent an empty GetTxs message when it receives an empty TxIds from peers, and it had made the network waste bandwidth for unnecessary messages. Swam<T> became to no more send such empty GetTxs. [#297]
• BlockChain<T>.Swap() became to delete an index, tx nonces, and state references in the replaced chain. [#329]
• Reduced the memory footprint of BlockChain<T>.FindBranchPoint() method under the circumstances that the height of the BlockChain<T> object is high. [#282, #299]

Bug fixes

• Fixed a bug that Swarm<T> reported TaskCanceledException as an unknown exception while stopping. [#275]
• Fixed a bug that Swarm<T> didn't stop properly during Swarm<T>.PreloadAsync(). [#275]
• Fixed a bug where the oldest TxNonce of an address is not invalidated when forking using FileStore.ForkTxNonce() method. [#281]
• Fixed a bug where LiteDBStore.GetTxNonce() method throws a System.IO.IOException after forking. [#281]
• Fixed a bug that TurnClient had not stopped properly. [#287]
• Fixed a bug that TurnClient had been trying to use an already closed connection. [#303, #308]
• Fixed a bug that KeyNotFoundException had been thrown instead of ArgumentOutOfRangeException when Blockchain<T>[int] called while the index of a block that does not exist locally. [#208, #317]
• Fixed a bug that Swarm<T> had not dial to other peer after Swarm<T>.PreloadAsync(). [#311]
• Fixed an issue where unknown exceptions occurred when Swarm<T> receiving a message. [#321, #327]

Version 0.3.0

Released on May 31, 2019.

Backward-incompatible interface changes

• Added IAction.Render(IActionContext, IAccountStateDelta) method. [#31, #212]
• Added IAction.Unrender(IActionContext, IAccountStateDelta) method. [#31, #212]
• BlockChain<T>.Validate() method became to receive IReadOnlyList<Block<T>> instead of IEnumerable<Block<T>>. [#205]
• IBlockPolicy<T>.GetNextBlockDifficulty() method became to receive IReadOnlyList<Block<T>> instead of IEnumerable<Block<T>>. [#205]
• Added IBlockPolicy<T>.ValidateNextBlock(IReadOnlyList<Block<T>>, Block<T>) method. [#210]
• Removed IBlockPolicy<T>.ValidateBlocks() method. [#210]
• BlockChain<T>[int] became to throw ArgumentOutOfRangeException instead of IndexOutOfRangeException. [#210]
• Removed KeyEquals() methods from all classes and structs. [#216]
• Swarm class now does not implement IEquatable<Swarm> anymore and its Equals(object) method and GetHashCode() method became to have default behavior of object class. [#216]
• Also, Swarm class now does not implement IDisposable too. Thus Swarm.Dispose() was removed too. [#218]
• Swarm became to use a queue to maintain internal messages. [#218]
  • The broadcasting methods are no more async, so they are renamed as below.
    • Swarm.BroadcastBlocksAsync() → Swarm.BroadcastBlocks()
    • Swarm.BroadcastTxsAsync() → Swarm.BroadcastTxs()
• The type of Block<T>.Difficulty is changed to long instead of int, and related classes method parameters and field types have changed accordingly.
• Removed HashDigest.HasLeadingZeroBits() method. [#213]
• The signature of IStore.PutBlock<T>(Block<T>) method was changed to PutBlock<T>(Block<T>, Address). [#189, #197]
• Block<T>.Hash is no longer calculated using the full data of the Transaction<T>, but is calculated using only the Transaction<T>.Id. [#234]
• Added IStore.LookupStateReference<T>(string, Address, Block<T>) method. [#232]
• Added IStore.StoreStateReference<T>(string, Block<T>) method. [#232]
• Added IStore.ForkStateReferences<T>(string, string, Block<T>, IImmutableSet<Address> method. [#232]
• Removed Block<T>.Validate() and Block<T>.EvaluateActions() method. [#243]
• Added Transaction<T>.Nonce and RawTransaction.Nonce properties. [#246]
• Added IStore.GetTxNonce(string, Address) method. [#246]
• Added IStore.IncreaseTxNonce<T>(string, Block<T>) method. [#246]
• Added IStore.ForkTxNonce<T>(string, string, Block<T>, IImmutableSet<Address> method. [#246]

Added interfaces

• BlockChain<T> became to implement IReadOnlyList<Block<T>>. [#205]
• Added Swarm.DifferentVersionPeerEncountered event handler that can handle events when a different version of a peer is discovered. [#167], [#185]
• Added Peer.AppProtocolVersion property. [#185]
• Added Swarm.PreloadAsync() method to explicitly and preemptively download initial blocks before Swarm.StartAsync<T>() being called. [#204], [#206]
• Added BlockDownloadState class to represent a block downloading state. [#204], [#206]
• Added BlockPolicyExtension.ValidateBlocks<T>(IBlockPolicy<T>, IReadOnlyList<Block<T>>, DateTimeOffset) method. [#210]
• Added Transaction<T>.EvaluateActionsGradually(HashDigest<SHA256>, long, IAccountStateDelta, Address, bool) method. [#31, #212]
• Added Block<T>.EvaluateActionsPerTx(AccountStateGetter) method. [#31, #212]
• Added HashDigest.Satisfies() method. [#213]
• BlockPolicy<T> constructor became to receive the minimumDifficulty and the mining difficultyBoundDivisor. [#213]
• Added BlockChain<T>.UnstageTransactions() method. [#223]
• Swarm constructor became to receive a linger (or millisecondsLinger) parameter. This purposes to determine how long to wait for pending messages when a Swarm instance is requested to terminate.
• Added NamespaceNotFoundException class. [#232]
• Added Block<T>.Evaluate() method. [#243]
• Made InvalidBlockTimestampException class public so that it can be caught. [#133, #251]
• Added InvalidTxNonceException class. [#246]

Behavioral changes

• Swarm.StartAsync() now receives the height of blocks (tip Index) from other known peers and synchronizes the blocks if necessary before propagating/receiving pinpointed recent blocks to prevent inefficient round-trips. [#187, #190]
• The calculation algorithm of BlockPolicy<T>.GetNextBlockDifficulty() method was changed to the Ethereum Homestead algorithm except for the difficulty bomb. [#213]
• The difficulty was changed from representing the number of leading zeros of target number to representing a divisor to obtain the target number. [#213]
• BlockSet<T>[int] changed so as not to validate a block. [#231]
• Improved read performance of Block<T>.Hash and Transaction<T>.Id. [#228, #234]
• Swarm.StartAsync() now does not call Swarm.StopAsync() anymore, therefore Swarm.StopAsync() should be explicitly called. [#236]
• Transaction<T>.EvaluateActionsGradually() became to record IAccountStateDelta.SetState() calls even if its argument is the same to the previous state. [#241]
• Block<T>.Validate() and Block<T>.EvaluateActions() are integrated into Block<T>.Evaluate(). [#243]
• BlockChain<T>.Append() became to execute Action.Execute() only once per action in the Block<T>. [#243]
• BlockChain<T>.Append() method became to throw InvalidTxNonceException when the Transaction<T>.Nonce does not correspond to its Signer's current nonce. [#246]
• Swarm became to enforce ForceDotNet.Force() in AsyncIO while it's running on Mono runtime. [#247]

Bug fixes

• Fixed a bug that TURN relay had been disconnected when being connected for longer than 5 minutes. [#198]
• Fixed a bug that Swarm had attempted to use TURN relay even if the host argument was given. [#198]
• Improved the read throughput of BlockChain<T>.Append().
• Improved overall read throughput of BlockChain<T> while blocks are being mined by BlockChain<T>.MineBlock(). [#191]
• Fixed a bug that TurnClientException had been thrown by Swarm when a STUN nonce is stale. [#193]
• Fixed BlockChain<T>.GetStates() had descended to the bottom (i.e., the genesis block) where a given Address refers to a nonexistent account (i.e., never used before). [#189, #192]
• Fixed a bug that a TURN connection had turned unavailable after it once failed to parse a message (due to a corrupted packet). [#215]
• Instead of validating the entire blocks, BlockChain<T>.Append() method became to validate only the next block to be appended. [#210]
• Improved BlockChain<T>.Fork() performance by avoiding double validation of already validated blocks. [#215]
• Removed unnecessary writer locks on BlockChain<T>.StageTransactions(). [#217]
• Improved concurrency of BlockChain<T>.Append() method by removing unnecessary race conditions. [#217]
• Fixed a bug that Swarm could not properly communicate with Peer behind NAT. [#240]
• Fixed a bug that BlockChain<T>.FindNextHashes() throws ArgumentOutOfRangeException when chain is empty.
• Fixed a bug that TurnClient.AcceptRelayedStreamAsync()didn't handle concurrent connections correctly. [#256]

Version 0.2.2

Released on April 12, 2019.

• Fixed a bug that BlockChain<T>.GetStates() had returned slower than necessary for many addresses. [#189, #192]

Version 0.2.1

Released on April 7, 2019.

This version purposes to entirely replace 0.2.0, because a wrong .nupkg file was uploaded to 0.2.0 on NuGet Gallery. Note that 0.2.0 on NuGet Gallery was unlisted.

Version 0.2.0

Released on April 5, 2019.

• PrivateKey.Decrypt() now throws an InvalidCiphertextException instead of returning null when cipherText is invalid. [#140]

• Transaction<T>'s Sender–Recipient model was replaced by Signer–UpdatedAddresses model. Unlike cryptocurrencies, transactions in games are not necessarily a transfer of assets, so it is difficult to determine what type of assert is transferred or who will receives the asset. A more useful perspective is, like what kind of transformation is performed, or what states are changed. To be close to this perspective, we decided to get rid of Transaction<T>.Recipient (which is singular) and have Transaction<T>.UpdatedAddresses (which is plural) instead. As there is no more asset to transfer, the term Sender was also renamed to Signer, which fits more to the new perspective. [#121]

  • Renamed Transaction<T>.Sender, RawTransaction.Signer, and IActionContext.From properties to Signer. The corresponding parameter names on constructors and methods were also renamed too.
  • Old Transaction<T>.Make() factory method is replaced by new Transaction<T>.Create() factory method. The timestamp parameter became optional, and the new optional updatedAddresses parameter was added.
  • Removed IActionContext.To property.
  • Transaction<T>.Recipient and RawTransaction.Recipient properties were replaced by Transaction<T>.UpdatedAddresses and RawTransaction.UpdatedAddresses properties. The corresponding parameter names on constructors and methods were replaced too.
  • Since the schema of RawTransaction class was changed, the serialization format of transactions and blocks were also changed. It affects to the way to generate Transaction<T>.Signature, Transaction<T>.Id, and Block.Hash values as well.
  • Added InvalidTxUpdatedAddressesException exception class.
  • A nullary overload of Block<T>.Validate() method was gone so that the block validation API is always time-wise. Instead, Block<T>.Validate() method now has only one overload: Validate(DateTimeOffset, AccountStateGetter) returning IAccountStateDelta.
  • Block<T>.Validate() and BlockChain<T>.Validate() methods now can throw an InvalidTxUpdateAddressesException.

• The Addresses IAction tries to update no more need to be manually coded using IAction.RequestStates() method. That method was removed at all, and updated Addresses became automatically determined (for the most cases) by track "dirties" on rehearsal mode. This mode dry-runs IActions with empty IActionContext.PreviousStates. [#121]

  • Added AccountStateGetter delegate to provide a read-only view to account states.
  • Added IAccountStateDelta interface to replace AddressStateMap. The interface purposes to provide a read-write view to account states with maintaining UpdatedAddresses (so-called "dirty"). [#98]
  • The type of IActionContext.PreviousStates property was changed from AddressStateMap to IAccountStateDelta.
  • Added IActionContext.Rehearsal property. [#131, #135]
  • Added UnexpectedlyTerminatedTxRehearsalException class. [#132, #136]
  • The return type of IAction.Execute() method was changed from AddressStateMap to IAccountStateDelta.
  • Removed IAction.RequestStates() method because there is no need for it and thus it is not used anymore.
  • Added Transaction<T>.EvaluateActions() method.
  • Added Block<T>.EvaluateActions() generator method.

• The built-in subtype polymorphism of IAction and Transaction<T> was moved to a separated new PolymorphicAction<T> abstract class. Polymorphic actions now should be wrapped by PolymorphicAction<T>. For example, the following code:

  public abstract class AbstractAction : IAction { ... }
  
  [ActionType("attack")]
  public sealed class Attack : AbstractAction { ... }
  
  [ActionType("sleep")]
  public sealed class Sleep : AbstractAction { ... }
  

  var tx = Transaction<AbstractAction>.Create(
      ...,
      actions: new[] { new Attack(...), ... }
  );
  

  should be changed to like:

  var tx = Transaction<PolymorphicAction<AbstractAction>>.Create(
      ...,
      actions: new[] {
          new PolymorphicAction<AbstractAction>(new Attack(...)),
          ...
      }
  );
  

  It can be simpler by implicit casting:

  var tx = Transaction<PolymorphicAction<AbstractAction>>.Create(
      ...,
      actions: new PolymorphicAction<AbstractAction>[] { new Attack(...), }
  );
  

  [#169]

  • The type parameter T of Transaction<T>, Block<T>, and BlockChain<T> became to require having a public parameterless constructor (i.e., new()) besides implementing IAction interface. This means an abstract class or an interface no more can be passed to T, but only a concrete class or a struct can be passed.

• Fixed a bug that mutating a collection of IActions passed to constructors or factory methods of Transaction<T> had affected made instances as well. The type of Transaction<T>.Actions property was changed from IList<T> to IImmutableList<T>. The corresponding parameters on constructors and factory methods also were changed to take IEnumerable<T> instead of IList<T>.

• Address and TxId are now serializable. [#99, #124 by Qria]

• InvalidTxException and its subclasses became to have TxId property and the corresponding constructor parameter. This can be useful when multiple Transaction<T> objects are validated at once.

• Added Address.Size constant, which is fixed to the Int32 20.

• Fixed a bug that Block<T>.Validate() had not thrown InvalidTxException even if there is any integrity error on its Transactions.

• Improved the write throughput of BlockChain<T> while polling BlockChain<T>.GetStates()

• Swarm.AddPeersAsync() was fixed so that unreachable Peers are ignored. [#128]

• Swarm became able to relay their connection via TURN (RFC 5766) to NAT traversal. To enable this, its constructor (Swarm()) takes the newly added IceServers as configuration.

• Since we decided to depend on TURN (RFC 5766) and STUN (RFC 5389) to work around NAT so that Peer's endpoints don't have to be multiple, Peer.Urls was renamed to Peer.EndPoint and its type also was changed from IImmutableList<Uri> to DnsEndPoint. [#120, #123 by Yang Chun Ung, #126, #127, #165, #166]

• Swarm became to ignore tip blocks of the same height (Index) that it already has and deal with only longer (higher) blocks.

• Fixed a bug that occurred when Swarm was handling multiple responses at the same time.

• Fixed a bug that the Swarm constructor had hanged in certain runtimes like Unity engine.

• Removed AddressTransactionSet which handles handle Address to IEnumerable<TxId> indices, and the following methods in IStore:

  • IStore.IterateAddresses()
  • IStore.GetAddressTransactionIds()
  • IStore.AppendAddressTransactionId()
  • IStore.CountAddresses()

• Added IStore.ListNamespaces() method.

• IStore.CountBlocks() and IStore.CountTransactions() became to return long.

• Block/tx-related methods in IStore and BaseIndex<T> no longer accepts @namespace parameter. It means that even if a forking occurs, the same block/tx files are shared.

• Fixed a bug that made unnecessary fork when receiving blocks from other peer.

• Action classes that implement IAction but lack ActionTypeAttribute became reported by PolymorphicAction<T> throwing MissingActionTypeException at runtime. [#28, #144, #169]

• Turn into parameter in BlockPolicy's constructor to milliseconds. [#151]

• BencodexFormatter became able to serialize BigInteger. [#159]

• Made Swarm possible to configure its network appProtocolVersion and, to ignore peers if their version is different. [#167], [#170]

• Added DifferentAppProtocolVersionException class. [#167, #170]

• Added IActionContext.Miner property. [#173], [#174]

• Renamed Block<T>.RewardBeneficiary to Block<T>.Miner. [#174]

• Added BlockChain<T>.Blocks property. [#176]

• Added BlockChain<T>.Transactions property. [#176]

Version 0.1.1

Released on March 5, 2019.

• Improved stability of Swarm and SwarmTest.

Version 0.1.0

Initial release. Released on February 26, 2019.