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CHANGELOG: release 0.90.0

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This document outlines major changes between releases.
## 0.74.0 "Comprehension" (17 Mar 2020)
Functionally complete NEO 2.0 node implementation, this release can be used as
a drop-in replacement for C# node in any setting. It features full RPC
functionality support and full set of wallet operations. As usual, there
also was a number of bugs fixed, the node stability improved and some great
optimizations were also done (especially concentrated around DB interactions),
so even though this release has more functionality than ever (and it stores a
lot more chain data than ever) it at the same time imports blocks faster than
the previous one.
Of course we will make additional maintenance releases for NEO 2.0 when
needed, but following this release we'll concentrate more on NEO 3.0 features
and catching up with recent community developments around that.
New features:
* WIF and NEP2 keys import/export into/from the wallet (#685)
* multisig accounts import into the wallet (#685)
* additional key generation for existing wallets (#685)
* support for `break` and `continue` statements in the compiler (#678)
* `getblocksysfee` RPC method support (#341)
* `getapplicationlog` RPC method support (#500, #754)
* `getclaimable` RPC method support (#694)
* gas claiming support in wallet CLI (#694)
* asset transfer commands in wallet CLI (#694, #706)
* `getrawmempool` RPC method support (#175)
* RPC client support for all methods implemented in neo-go's server (#586,
#715, #694, #723, #750)
* `getblockheader` RPC method support (#722)
* `getnep5balances` and `getnep5transfers` RPC methods support (#498, #751)
* `gettransactionheight` RPC method support (#713)
* `submitblock` RPC method support (#344)
* `getvalidators` RPC method support (#714)
* support for `switch` `fallthrough` statements in the compiler (#628)
* a set of `NEP5*` methods added to RPC client for convenient NEP5 contract
calls (#728, #764)
* NEP tokens balance querying and transfers support for CLI (#728, #757)
* `getunclaimed` RPC method support (#712)
* contract import was added to the wallet CLI command set (#757)
* key removal added to the wallet CLI command set (#757)
* https support for RPC server (#702)
Behaviour changes:
* gas parameter for deployment no longer specifies full gas to be added into
the transaction, it now only specifies the network fee part while system
fee part is computed automatically based on contract's metadata (#747)
* contract deployment and invocation from CLI is now integrated with the
wallet subsystem, WIF parameter support was dropped (#747)
* wallet subcommands were renamed, `create` became `init` and
`create-account` became simple `create` (#757)
* DB format was changed several times during this release cycle, so please
resynchronize your chains
Improvements:
* improved and extended `wallet` package (#685, #694, #706, #728, #757)
* refactored RPC package (dividing it into smaller subpackages, #510, #689)
* `GroupInputsByPrevHash` is no longer tied to `Transaction`, allowing its
wider use (#696)
* more efficient `transaction.InOut` type is used for `References` (#696,
#733)
* RPC client's `SendToAddress` was renamed to `TransferAsset` to better
reflect its purpose (#686)
* P2P server's graceful shutdown with connection closing (#691)
* broadcasted transaction batching was added improving network efficiency
(#681)
* dropped duplicating `rpc.StackParamType` in favor of improved
`smartcontract.ParamType` (#690, #706)
* trigger types moved to their own `trigger` package (#690)
* all Go packages were moved from github.com/CityOfZion to
github.com/nspcc-dev where they technically already reside since August
2019 (#710)
* NEP5 balances and transfers tracking was added to Blockchain (#723, #748)
* optimized transaction inputs/outputs/results verification (#743)
* `SpentCoin` and `UnspentCoin` structures were merged and moved into `state`
package (#743)
* `AddVerificationHash` method was added to `Transaction` to simplify
attributes management (#752)
Bugs fixed:
* `getpeers` RPC request was not returning unconnected and bad peers (#676)
* RPC client was not reporting real error from the answer in case of HTTP
error (#676)
* potential race in `Seek` implementation for `MemoryStore` (#693)
* improper handling of more than 64K branching points in the compiler (#687)
* Enrollment transactions verification didn't check for validator key (#696)
* Claim transaction witness check might miss some hashes from Inputs (#696)
* double Claim verification was missing (#696)
* network fee calculation was completely broken (#696)
* mempool's `Remove` might drop wrong transaction (#697)
* missing double claim verification for mempool transactions (#697)
* server deadlock upon reaching connection limit (#691)
* wrong logic short-circuiting by compiler in complex conditions (#699, #701)
* `AddHeaders` method was not verifying headers in any way (#703)
* missing Claim amount verification (#694)
* bogus error returned from `GetValidators` when processing transfers to
(yet) unexisting accounts (#694)
* Claim and Miner transactions network fee was wrong (#694)
* negative outputs were allowed in transactions, but shouldn't (#694)
* smart contract invocation CLI command failed to process some parameters
correctly (#719)
* fatal error on concurrent access to `Blockchain` internal variable (#720)
* Invocation transactions missed some decoding checks (#718)
* it was allowed to have fractional GAS in Invocation transactions (which is
interpreted as system fee), but it shouldn't (#718)
* system fee calculation for Invocation transactions was incorrect (#718)
* `Transaction` JSON unmarshalling was processing Outputs and Witnesses
incorrectly (#706)
* panic on server shutdown in case it's not fully started yet (#721)
* `sendrawtransaction` RPC method implementation was not following error
codes convention (#724)
* interop implementations were using wrong byte order for returned hashes
leading to storage state differences at mainnet's block 2025204 (#727)
* `getblock` verbose response format was not following official documentation
(#734)
* contract deployment could fail with no error returned (#736)
* max contract description limit was wrong, leading to deployment failures
(#735)
* compiler didn't properly clean up stack on `return` or `break` in some
situations (#731)
* deadlock in discovery service (#741)
* missing dynamic `APPCALL` support (#740)
* `EQUAL` opcode implementation was not comparing different stack item types
correctly (#745, #749)
* RPC error on contract invocation when Hash160 is being passed into it
(#758)
* absent any ping timeouts configuration the node was constantly pinging its
neighbours (#680)
* contract's state migration was not done properly (#760)
* db import with state dump was not saving dumps correctly on interruption
and was now resuming writes to dump files correctly after restart (#761)
* incomplete State transaction verification (#767)
* missing Owner signature check for Register transaction (#766)
* incomplete Issue transaction verification and mempool conflicts check
(#765)
## 0.73.0 "Cotransduction" (19 Feb 2020)
This is the first release than can successfully operate as a Testnet CN
bringing with it fixed voting system implementation, policying support and
other related fixes. It also contains RPC improvements and updates to the
compiler.
New features:
* Go smart contracts can now use variables for struct fields initialization
(#656)
* for range loops support in the compiler (#658)
* subslicing support for `[]byte` type (#654)
* block's storage changes dump support similar to NeoResearch's storage audit
(#649)
* `gettxout` RPC method support (#345)
* `getcontractstate` RPC method support (#342)
* `getstorage` RPC method support (#343)
* GetChangeAddress function in the wallet (#682)
* basic policying was implemented allowing to configure
MaxTransactionsPerBlock, MaxFreeTransactionsPerBlock,
MaxFreeTransactionSize and FeePerExtraByte (#682)
Behaviour changes:
* consensus process now only start when server sees itself synchronized with
the rest of the network (see (*Server).IsInSync method, #682)
* default testnet and mainnet configurations now contain policer settings
identical to default SimplePolicy C# plugin (#682), privnet is not changed
Improvements:
* keys.PublicKey now has Cmp method available (#661)
* core now exports UtilityTokenID and GoverningTokenID functions (#682)
* miner transactions generated by consensus process now properly set outputs
based on block's transactions fees (#682)
* (*Blockchain).`IsLowPriority` now takes fee (Fixed8) as an input (#682)
* mempool's GetVerifiedTransactions and TryGetValue now also return
transaction's fee
* DBFT logging was improved
* keys package no longer has Signature methods, they were replaced with more
useful GetScriptHash (#682)
Bugs fixed:
* compiler produced wrong code if there was some data containing byte 0x62 in
the program (#630)
* answer to the `getblock` RPC method was not following the specification in
multiple places (#659)
* State transaction's descriptors were not encoded/decoded correctly (#661)
* keys.PublicKeys slice was not decoded properly (#661)
* 'Registered' descriptor of State transaction was not decoded correctly
(#661)
* voting processing and validators election was fixed to follow C#
implementation (#661, #512, #664, #682)
* deadlock in network subsystem on disconnect (#663)
* RPC answers with transactions were not following the specification in fields
names (#666)
* segmentation fault when checking references of bad transactions (#671)
* `getassetstate` and `getrawtransaction` RPC methods were not returning
error properly when missing asset or transaction (#675)
* consensus RecoveryMessage encoding/decoding wasn't correct (#679)
* DBFT was not reinitialized after successful chain update with the new block
received from other peers (#673)
* DBFT timer was extended too much, not following the C# implementation (#682)
## 0.72.2 "Confabulation" (11 Feb 2020)
Bugfix and small refactoring release, though it's the first one to include
improved CHECKMULTISIG implementation that is ~20% faster.
Improvements:
* parallel CHECKMULTISIG implementation improving this instruction speed by
around 20% (#548)
* bytecode emitting functions moved to separate package, avoiding old
duplicate code and improving testing (#449, #534, #642)
* AppCall interop now accepts variable number of arguments (#651)
* more logging at info level from consensus subsystem, following neo-cli
behaviour
Bugs fixed:
* compiler-emitted integers were using wrong format (#642)
* FreeGasLimit configuration set to zero was not really disabling gas limits
(#652)
* stale disconnected peers could cause networking subsystem deadlock (#653)
* transaction reverification (on new block processing) could lead to
blockchain deadlock for non-standard verification contracts (#655)
## 0.72.1 "Contextualization" (07 Feb 2020)
Exactly one bug fixed relative to the 0.72.0:
* testnet synchronization failed at block 713985 because of wrong
notification generated by the invocation transaction (#650)
## 0.72.0 "Crystallization" (06 Feb 2020)
Starting at the end of the year 2019 we've spent a lot of effort to
stress-test our node with transaction load and this allowed us to uncover
some problems in various parts of the system. This release addresses all of
them and brings with it updated networking, consensus and mempool components
that can handle quite substantial transaction traffic and successfully produce
new blocks while being stressed. There are also important updates in VM that
fix incompatibilities with C# node and interesting improvements in compiler
based on our experience porting neofs smart contract to Go.
New features:
* `dump` command for wallet to dump it (replaced non-functional `open`
command, #589)
* support for single-node consensus setup (#595)
* ping/pong P2P messages are now supported with PingInterval and PingTimeout
configuration options (#430, #610, #627, #639)
* VM now fully supports calculating GAS spent during execution (#424, #648)
* Fixed8 type now supports YAML marshalling (#609)
* RPC invoke* calls can now be GAS-limited with MaxGasInvoke configuration
option (#609)
* gas limit for free invocation transactions can now be configured with
FreeGasLimit option which default to 10.0 for mainnet and testnet (#609)
* new compiler interop VerifySignature to verify ECDSA signatures (#617)
* compiler now supports loops with single condition (no init/post, #618)
* memory pool size is now configurable with MemPoolSize option which defaults
to 50000 for all configurations (#614)
* support for variables in slice literals in the compiler (#619)
* support for map literals in the compiler (#620)
* AppCall interop function (#621)
* `string` to `[]byte` conversion was implemented in the compiler (#622)
* Docker images now contain a dump of 1600 blocks for single-node setups and
one can choose which dump to use for restore with ACC environment variable
(#625)
* switch statement support in the compiler (#626)
* panic support in the compiler (#629)
Behaviour changes:
* NEP2Decrypt function in keys package now returns a pointer to PrivateKey
rather than a WIF-encoded string (#589)
* DecryptAccount function in wallet package was moved to Decrypt method of
Account (#589)
* logging was moved from logrus to zap which changed messages format a little
(#284, #598)
* Block, BlockBase and Header structures were moved into their own `block`
package (#597)
* MemPool was moved into its own `mempool` package (#597)
* Sign method of PrivateKey no longer returns an error (#604)
* wallet is now compatible with C# node wallets (#603)
* consensus service now gets its keys from the wallet file instead of
plain-text WIF in the configuration (#588)
* `image` Makefile target was updated to nspccdev repo (#625)
* serializing invalid Transaction structures (that have no Data) is now
forbidden (#640)
* Item is no longer exposed by the mempool package (#647)
Improvements:
* better testing of keys, wallet, compiler and mempool packages (#589, #568,
#647)
* smart use of previous proposal for block generation after dBFT's ChangeView
(#591)
* peer-server interaction refactored (#606)
* peer message queues were introduced with different priorities reducing
delays in consensus messages delivery and improving unicast communication
(#590, #615, #639)
* more efficient code generated by the compiler in some cases (#626, #629,
#637)
* mempool redesign leading to better performance (#647), it also doesn't
store unverified transactions now
Bugs fixed:
* consensus service was not really requesting transactions from peers when it
was missing some locally (#602)
* build failing with newer rfc6979 package (#592)
* wrong integer serialization/deserialization in VM leading to
inconsistencies in state with C# node (#501/#605)
* consensus service was not processing node election results to
enable/disable dBFT (#603)
* in some cases peers were not unregistered after disconnect (#606)
* different execution results with C# node because of missing invocation fee
calculations (#607)
* RPC server now properly returns the amount of gas spent during execution
for invoke* calls (#609)
* FromAddress interop was translated improperly by the compiler (#621)
* compiler emitting wrong integers (#624)
* EOF errors on recovery consensus messages decoding (#632)
* wrong handling of assignments to underscore variable in the compiler (#631)
* wrong answers to getunspents/getaccountstate RPC requests for unknown
addresses (#633)
* multiple dBFT issues leading to consensus stalls, attempts to add wrong
block to the chain, message processing using wrong height and other
problems (#635, #641)
* duplicate connections were not detected before the handshake completion
which can happen too late (#639)
* attempts to connect to peer that has already connected to node (#639)
* unregistration of connected addresses (#639)
* ArrayReverse function was not copying arrays of size 1 (#644)
* race in transaction verification/addition to the mempool leading to
potential double spends (#647)
* wrong concurrent attempts to add new block to the chain (#647)
* blocks were not relayed properly by non-consensus nodes (#647)
* mempool memory leak (#647)
* missing reverification after block acceptance for transactions in mempool
(#647)
## 0.71.0 "Celebration" (30 Dec 2019)
Version 0.71.0 ends the year 2019 of neo-go development with a solid release
that adds support for pprof, implements all missing interoperability
functions, improves performance and as usual fixes some bugs. This is also the
first release with a test coverage of more than 60% which is a significant
milestone in our trend to improve code quality and testing. Back in August
2019 when NSPCC had started neo-go developement the project only had a
coverage of 45% and even though a lot of code has been added since we're
improving this metrics with every release.
New features:
* pprof support (disabled by default, #536)
* compiler now supports assignments to an element of slice using variable
index (#564)
* hashed 4-byte IDs support for SYSCALL instruction (#565)
* remainder ('%') operator support in compiler (#563)
* Neo.Witness.GetVerificationScript and Neo.InvocationTransaction.GetScript
interop functions (#421)
* Neo.Iterator.*, Neo.Enumerator.* and Neo.Storage.Find interops (#422)
* tuple return support in compiler (#562)
* `getblocks` P2P command implementation (#577)
Behaviour changes:
* `Monitoring` config section changed its name to `Prometheus` because of
pprof addition (#536)
* `db dump` command now also writes the block number zero by default to
comply with ImportBlocks format (#582)
* `skip` parameter was renamed to `start` in the `db dump` command (#582)
* `db restore` now skips the genesis block in the dump if starting to import
into the new DB and if this block matches the one generated on blockchain
init (#582)
Improvements:
* VM optimizations (#558, #559, #565, #572)
* top block caching in core to improve dApps performance (#572)
* transaction's TXType can now be JSON-unmarshalled (#575)
* `crypto` package no longer exports AES functions (#579)
* merkle tree functions and structures were moved into the `hash` package
(#579)
* base58 functionality was moved into its own package from `crypto` (#579)
* `Uint160DecodeAddress` and `AddressFromUint160` functions were moved out of
`crypto` into their own package (#579)
* `address` package now can be configured to use different prefixes (#579)
Bugs fixed:
* wrong INVERT instruction behaviour for converted values (#561)
* wrong DUP behaviour when the next instruction doesn't convert the value
(#561)
* OVER and PICK implementations didn't properly duplicate stack items (#561)
* PICKITEM instruction failed to duplicate picked items (#561)
* `getblock` RPC call was not answering with full hex-encoded block (#575)
* base58.CheckDecode was decoding values with leading zeroes in a wrong way
(#579)
* decoding wrong public key could succeed (#579)
* consensus payload verification was inconsistent with other verification
code (#555)
* DB dump was using wrong format in release 0.70.1 (#582)
* DB restorer was not properly counting skipped blocks which could lead to
bogus error being reported (#582)
* the DB was not closed properly on error during DB restore (#582)
* NPE in consensus (#583)
## 0.70.1 "Centrifugation" (16 Dec 2019)
Release 0.70.1 brings no new functionality focusing on internal node
improvements instead. Some bugs were fixed, refactoring was done and
performance was improved substantially.
Behaviour changes:
* as with the previous release, this one changes the database format, so you
need to resynchronize your nodes
* code testing will fail if you're not to checkout submodules (we have one
with neo-vm tests, #543)
Improvements:
* "inv" command handling was changed to not ask peers of the items we already
have (#533)
* numerous optimizations across the whole system (#535, #546, #547, #545,
#549, #550, #553, #554, #556, #557)
* compiler no longer outputs errors by itself, passing them programmatically
instead via its API (#457)
* VM opcodes were moved into their own package allowing wider reuse (#538)
* `compiler` package was moved one level up from `pkg/vm/compiler` to
`pkg/compiler` (#538)
* proper script trigger constants were added (#509)
* consensus payloads are now properly signed and this signature is being
checked (#544)
* Uint160/Uint256 types were made more consistent and having an explicit
LE/BE suffix for conversion functions (#314)
* a separate layer based on storage.Store with state item-specific functions
was created (#517, #334)
* ReadBytes/WriteBytes in io package were renamed into
ReadVarBytes/WriteVarBytes to more accurately describe them and be more
consistent with C# implementation (#545)
* io package was refactored to add type-specific read/write methods to its
structures and remove generic (slow) ReadLE/WriteLE (#553, #554)
* a simple tx performance benchmark was added (#551)
Bugs fixed:
* consensus could start and stall with not-yet-connected peers (#532)
* nil pointer dereference in PrepareResponse and PrepareRequest messages
handling (#532)
* fatal error because of locking problems in mempool (#535)
* missing error handling in compiler emitter functions (#297)
* wallet opening command now hides the password printed into it (#539)
* storage was updated improperly when several transactions in one block were
touching the same keys, leading to subsequent transactions failures (#542)
* application execution results were not saved in full (#517)
* mempool transaction verification was wrong (#557)
## 0.70.0 "Constellation" (29 Nov 2019)
This is a long-awaited and exciting release implementing a full Neo
consensus node that you can run your own neo-go private net with! It also
brings with it serious improvements in contract handling, you can now not
only compile, but also deploy and invoke contracts with neo-go.
New features:
* systemd unit file for deployment (#326)
* claim transactions processing was added (#489)
* Consensus payloads decoding/encoding (#431)
* `getunspents` method is RPC server (#473)
* updated docker-compose environment for privnet setup (#497, #529)
* client-side `getunspents` RPC method support (#511)
* contract deployment from the CLI (#474)
* enrollment and state transactions processing (#508)
* `Neo.Blockchain.GetValidators` interop support (#420)
* `invokefunction` RPC method support in the server (#347)
* `testinvokefunction` command in the CLI to do test invocations via
`invokefunction` RPC method (#521)
* consensus node support (#507, #525)
* server-side `invoke` RPC method support (#346)
* `testinvoke` CLI command to invoke contracts via `invoke` RPC method (#527)
* `getheaders` P2P message processing (#529)
* relaying was added for transactions coming from P2P network (#529)
* `invoke` and `invokefunction` commands to invoke deployed script and send an
invocation transaction to the network (#531)
Behavior changes:
* db dump/restore format is now compatible with NGD chain dumps (#466)
* smart contracts now have a new configuration format that is used to deploy
them (#511)
* `testinvoke` CLI command was renamed to `testinvokescript` (#521)
Improvements:
* `core.Blockchainer` interface now has a `Close` method (#485)
* `util.Uint256Size` is now public (#490)
* `io` package now has generic functions for array
serialization/deserialization (#490)
* `util.Uint256` now supports `io.Serializable` interface (#495)
* `smartcontract.ParamType` type now supports `io.Serializable` interface
(#495)
* `vm.ByteArrayItem` now uses hex representation when being marshalled into
JSON (#499)
* `io` serialization/deserialization for arrays is now restricted in elements
count (#503, #505)
* `core.AccountState` now stores all UTXOs for the account (#504)
* interop functions got some testing coverage (#492)
* rpc client now implements `CalculateInputs` method via `getunspents` call
for transaction building (#511)
* `transaction.NewInvocationTX` now accepts a gas parameter for the
corresponding transaction field (#511)
* `rpc.StackParamType` now supports YAML marshaling/unmarshaling
* `rpc` package now has more fine-grained methods for transaction building
(#511, #531)
* `Blockchain` now stores and updates validators list (#508)
* blockchain state management refactored (#508)
* `rpc` invocation parameter management reworked (#513)
* `util` test coverage improved (#515)
* `invokescript` tests were added to the `rpc` package (#521)
* `crypto/keys` and `crypto/hash` packages test coverage improved (#516)
Bugs fixed:
* blockchain not persisting the latest changes on exit (#485)
* db dump/restore commands incorrectly handled `skip` parameter (#486)
* vm failed to serialize duplicating non-reference elements (#496)
* improper smartcontract notifications handling (#453)
* nondeterministic `GetReferences` interop behaviour leading to contract
failures (#454)
* writing message to the peer could be interleaved with other messages
leading to garbage being sent (#503, #506)
* inability to process block with previously relayed transaction (#511)
* decoding transaction with invalid type didn't return an error (#522)
* attempts to reconnect to the node with the same ID (#507)
* peer disconnects during handshake because of code race (#529)
* useless header requests from peers with low height (#529)
* wrong header hashes initialization from the DB in case there are 2000*N + 1
blocks in the chain (#529)
## 0.62.0 "Commotion" (07 Nov 2019)
Release 0.62.0 finishes one very important work some pieces of which were
gradually rolled out in previous releases --- it integrates all neo-vm project
JSON-based tests for NEO 2.0 C# VM and runs them successfully against neo-go
VM. There are also important bug fixes based on mainnet nodes deployment
experience and additional configuration options.
New Features:
* implemented `Runtime.Serialize` and `Runtime.Deserialize` syscalls (#419)
* new configuration option -- `AttemptConnPeers` to set the number of
connections that the node will try to establish when it goes below the
MinPeers setting (#478)
* `LogPath` configuration parameter to write logs into some file and not to
stdout (#460), not enabled by default
* `Address` configuration parameter to specify the address to bind to (#460),
not enabled by default
Behavior changes:
* mainnet configuration now has correct ports specified (#478)
* multiple connections to the same peer are disallowed now (as they are in C#
node (#478))
* the default MaxPeers setting was increased to 100 for mainnet and testnet
configurations and limited to 10 for privnet (#478)
Improvements:
* implemented missing VM constraints: stack item number limitation (#462) and
integer size checks (#484, #373)
* added a framework to run JSON-based neo-vm tests for C# VM and fixed all
remaining incompabitibilities (#196)
* added wallet unit tests (#475)
* network.Peer's NetAddr method was split into RemoteAddr and PeerAddr (#478)
* `MakeDirForFile` function was added to the `io` package (#470)
Bugs fixed:
* RPC service responded with block height to `getblockcount` request which
differs from C# interpretation of `getblockcount` (#471)
* `getbestblockhash` RPC method response was not adding leading `0x` prefix
to the hash, while C# node does it
* inability to correctly handshake clients on the server side (#458, #480)
* data race in `Server` structure fields access (#478)
* MaxPeers configuration setting was not working properly (#478)
* useless DB reads (that failed in some cases) on persist attempt that didn't
persist anything (#481)
* current header height was not stored in the DB when starting a new
blockchain which lead to node failures on restart (#481)
* crash on node restart if no header hashes were written into the DB (#481)
## 0.61.0 "Cuspidation" (01 Nov 2019)
New features:
* Prometheus support for monitoring (#441)
* `neo-go contract invoke` now accepts endpoint parameter (`--endpoint` or
`-e`) to specify RPC node to be used for invocation (#363)
* RPC server now supports `invokescript` method (#348)
* minimum peers number can now be configured (#468)
* configured CORS workaround implemented in the RPC package (#469)
Behavior changes:
* `neo-go contract inspect` now expects avm files in input, but can also
compile Go code with `-c` parameter (previously is was done by default),
`inspect` subcommand was removed from `neo-go vm` (it dumped avm files in
previous release) (#463)
* the default minimum peers was reduced to 3 for privnet setups to avoid
useless reconnections to only 4 available nodes
* RPC service now has its own section in configuration, update your
configurations (#469)
Improvements:
* VM.Load() now clears the state properly, making VM reusable after the Run()
(#463)
* Compile() in compiler package no longer accepts Options, they were not used
previously anyway (#463)
* invocation stack depth is now limited in the VM (#461)
* VM got new State() method to get textual state description (#463)
* vm's Stack structure can now be marshalled into JSON (#463)
Bugs fixed:
* race in discoverer part of the server (#445)
* RPC server giving improper (not JSON) respons to unimplemented API requests
(#463)
## 0.60.0 "Cribration" (25 Oct 2019)
Release 0.60.0 brings with it an implementation of all NEO 2.0 VM opcodes,
full support for transaction relaying, improved logging, a bunch of fixes and
an updated project logo.
New features:
* blocks dumping from DB to file and restoring from file to DB (#436)
* new logo (#444)
* implemented `getdata` message handling (#448)
* issue tx processing (#450)
* CALL_I, CALL_E, CALL_ET, CALL_ED, CALL_EDT implementation in the VM (#192)
Internal improvements:
* codestyle fixes (#439, #443)
* removed spurious prints from all the code, now everything is passed/logged
correctly (#247)
Bugs fixed:
* missing max size limitation in CAT and PUSHDATA4 opcodes implementation
(#435)
* wrong interpretation of missing unspent coin state when checking for double
spend (#439)
* panic on successive node starts when no headers were saved in the DB (#440)
* NEWARRAY/NEWSTRUCT opcodes didn't copy operands for array<->struct
conversions
* deadlock in MemPool on addition (#448)
* transactions were not removed from the MemPool when processing new signed
block (#446)
* wrong contract property constants leading to storage usage failures (#450)
## 0.51.0 "Confirmation" (17 Oct 2019)
With over a 100 commits made since 0.50.0 release 0.51.0 brings with it full
block verification, improved and fixed transaction verifications,
implementation of most of interop functions and VM improvements. Block
verification is an important milestone on the road to full consensus node
support and it required implementing a lot of other associated functionality.
New features:
* CHECKSIG, VERIFY and CHECKMULTISIG instructions in VM (#269)
* witness verification logic for transactions (#368)
* NEWMAP, HASKEY, KEYS and VALUES instructions, support for Map type in
PICKITEM, SETITEM, REMOVE, EQUAL, ARRAYSIZE (#359)
* configurable transaction verification on block addition (#415, #418)
* contract storage and support for VM to call contracts via APPCALL/TAILCALL
(#417)
* support for Interop type in VM (#417)
* VM now has stepInto/stepOver/stepOut method implementations for debugging
matching neo-vm behavior (#187)
* storage support for contracts (#418)
* added around 90% of interop functions (#418)
* Invocation TX processing now really does invoke contracts using internal VM
(#418)
* blocks are now completely verified when added to the chain (if not
configured otherwise; #12, #418)
Behavior changes:
* full block verification is now enabled for all network types
* block's transaction verification enabled for privnet setups, mainnet and
testnet don't have it enabled
Technical improvements:
* GetVarIntSize and GetVarStringSize were removed from the io package (use
GetVarSize instead; #408)
* OVER implementation was optimized to not pop the top element from the stack
(#406, part of #196 work)
* vm.VM was extended with HasFailed() method to check its state (previously
external VM users couldn't do it; #411)
* redesigned input block queue mechanism, now it's completely moved out of
the Blockchain, which only accepts the next block via AddBlock() (#414)
* unpersisted blocks are now fully available with the Blockchain (thus we
have symmetry now in AddBlock/GetBlock APIs; #414, #366)
* removed duplicating batch structures from BoltDB and Redis code, now all of
them use the same batch as MemoryStore does (#414)
* MemoryStore was exporting its mutex for no good reason, now it's hidden
(#414)
* storage layer now returns ErrKeyNotFound for all DBs in appropriate
situations (#414)
* VM's PopResult() now doesn't panic if there is no result (#417)
* VM's Element now has a Value() method to quickly get the item value (#417)
* VM's stack PushVal() method now accepts uint8/16/32/64 (#417, #418)
* VM's Element now has TryBool() method similar to Bool(), but without a
panic (for external VM users; #417)
* VM has now completely separated instruction read and execution phases
(#417)
* Store interface now has Delete method (#418)
* Store tests were reimplemented to use one test set for all Store
implementations, including LevelDB that was not tested at all previously
(#418)
* Batch interface doesn't have Len method now as it's not used at all (#418)
* New*FromRawBytes functions were renamed to New*FromASN1 in the keys
package, previous naming made it easy to confuse them with functions
operating with NEO serialization format (#418)
* PublicKey's IsInfinity method is exported now (#418)
* smartcontract package now has CreateSignatureRedeemScript() matching C#
code (#418)
* vm package now has helper functions
IsSignatureContract/IsMultiSigContract/IsStandardContract matching C# code
(#418)
* Blockchain's GetBlock() now returns full block with transactions (#418)
* Block's Verify() was changed to return specific error (#418)
* Blockchain's GetTransationResults was renamed into GetTransactionResults
(#418)
* Blockchainer interface was extended with GetUnspentCoinState,
GetContractState and GetScriptHashesForVerifying methods (#418)
* introduced generic MemCacheStore that is used now for write caching
(including temporary stores for transaction processing) and batched
persistence (#425)
Bugs fixed:
* useless persistence failure message printed with no error (#409)
* persistence error message being printed twice (#409)
* segmentation fault upon receival of message that is not currently handled
properly (like "consensus" message; #409)
* BoltDB's Put for a batch wasn't copying data which could lead to data
corruption (#409)
* APPEND instruction applied to struct element was not copying it like neo-vm
does (#405, part of #196 work)
* EQUAL instruction was comparing array contents, while it should've compared
references (#405, part of #196 work)
* SUBSTR instruction was failing for out of bounds length parameters while it
should've truncated them to string length (#406, part of #196 work)
* SHL and SHR implementations had no limits, neo-vm restricts them to
-256/+256 (#406, part of #196 work)
* minor VM state mismatches with neo-vm on failures (#405, #406)
* deadlock on Blockchain init when headers pointer is not in sync with the
hashes list (#414)
* node failed to request blocks when headers list was exactly one position
ahead of block count (#414)
* TestRPC/getassetstate_positive failed occasionally (#410)
* panic on block verification with no transactions inside (#415)
* DutyFlag check in GetScriptHashesForVerifying was not done correctly (#415)
* default asset expiration for assets created with Register TX was wrong, now
it matches C# code (#415)
* Claim transactions needed specific GetScriptHashesForVerifying logic to
be verified correctly (#415)
* VerifyWitnesses wasn't properly sorting hashes and witnesses (#415)
* transactions referring to two outputs of some other transaction were
failing to verify (#415)
* wrong program dumps (#295)
* potential data race in logging code (#418)
* bogus port check during handshake (#432)
* missing max size checks in NEWARRAY, NEWSTRUCT, APPEND, PACK, SETITEM
(#427, part of #373)
## 0.50.0 "Consolidation" (19 Sep 2019)
The first release from the new team focuses on bringing all related
development effort into one codebase, refactoring things, fixing some
long-standing bugs and adding new functionality. This release merges two
radically different development branches --- `dev` and `master` that were
present in the project (along with all associated pull requests) and also
brings in changes made to the compiler in the neo-storm project.
New features:
* configurable storage backends supporting LevelDB, in-memory DB (for
testing) and Redis
* BoltDB support for storage backend
* updated and extended interop APIs (thanks to neo-storm)
Notable behavior changes:
* the default configuration for privnet was changed to use ports 20331 and
20332 so that it doesn't clash with the default dockerized neo-privnet
setups
* the default configuration path was changed from `../config` to `./config`,
at this stage it makes life a bit easier for development, later this will
be changed to some sane default for production version
* VM CLI now supports type inference for `run` parameters (you don't need to
specify types explicitly in most of the cases) and treats `operation`
parameter as mandatory if anything is passed to `run`
VM improvements:
* added implementation for `EQUAL`, `NZ`, `PICK`, `TUCK`, `XDROP`, `INVERT`,
`CAT`, `SUBSTR`, `LEFT`, `RIGHT`, `UNPACK`, `REVERSE`, `REMOVE`
* expanded tests
* better error messages for different erroneous code
* implemented item conversions following neo-vm behavior: array to/from
struct, bigint to/from boolean, anything to bytearray and anything to
boolean
* improved compatibility with neo-vm (#394)
Technical improvements:
* switched to Go 1.12+
* gofmt, golint (#213)
* fixed and improved CircleCI builds
* removed internal rfc6969 package (#285)
* refactored util/crypto/io packages, removed a lot of duplicating code
* updated READMEs and user-level documents
* update Makefile with useful targets
* dropped internal base58 implementation (#355)
* updated default seed lists for mainnet and testnet from neo-cli
Bugs fixed:
* a lot of compiler fixes from neo-storm
* data access race in memory-backed storage backend (#313)
* wrong comparison opcode emitted by compiler (#294)
* decoding error in `publish` transactions (#179)
* decoding error in `invocation` transactions (#173)
* panic in `state` transaction decoding
* double VM run from CLI (#96)
* non-constant time crypto (#245)
* APPEND pushed value on the stack and worked for bytearrays (#391)
* reading overlapping hash blocks from the DB leading to blockchain state
neo-go couldn't recover from (#393)
* codegen for `append()` wasn't type-aware and emitted wrong code (#395)
* node wasn't trying to reconnect to other node if connection failed (#390)
* stricly follow handshare procedure (#396)
* leaked connections if disconnect happened before handshake completed (#396)
### Inherited unreleased changes
Some changes were also done before transition to the new team, highlights are:
* improved RPC testing
* implemented `getaccountstate`, `validateaddress`, `getrawtransaction` and
`sendrawtransaction` RPC methods in server
* fixed `getaccountstate` RPC implementation
* implemented graceful blockchain shutdown with proper DB closing
## 0.45.14 (not really released, 05 Dec 2018)
This one can technically be found in the git history and attributed to commit
fa1da2cb917cf4dfccbe49d44c5741eec0e0bb65, but it has no tag in the repository
and so can't count as a properly released thing. Still it can be marked as a
point in history with the following changes relative to 0.44.10:
* switched to Go modules for dependency management
* various optimizations for basic structures like Uin160/Uint256/Fixed8
* improved testing
* added support for `invoke` method in RPC client
* implemented `getassetstate` in RPC server
* fixed NEP2Encrypt and added tests
* added `NewPrivateKeyFromRawBytes` function to the `wallet` package
## 0.44.10 (27 Sep 2018)
This is the last one tagged in the repository, so it's considered as the last
one properly released before 0.50+. Releases up to 0.44.10 seem to be made in
automated fashion and you can find their [changes on
GitHub](https://github.com/nspcc-dev/neo-go/releases).
## 0.90.0 "Tantalization" (14 July 2020)
The first Neo 3 compatible release of neo-go! We've targeted to make it
compatible with preview2 release of Neo 3, so it only contains features
available there, but at the same time this makes the node more useful until we
have some more up to date reference version. It's a completely different
network, so almost everything has changed and it's hard to describe it with
the same level of details we usually do (but we'll provide them for subsequent
releases where the changeset is going to be lower in size). Please note that
this is a preview-level release and there won't be long-term support provided
for it, Neo 3 is evolving and the next release won't be compatible with this
one.
Main Neo 3 features in this release:
* no UTXO
* native contracts
* new VM
* scoped witnesses for transaction
* updated interop/syscalls set
* contract manifests
* more efficient P2P protocol
Things that have also changed:
* transaction format
* block format
* address format
* wallets
* RPC protocol
* notification subsystem
* executable format output for compiler
Compatibility level of this neo-go release:
* identical storage changes compared to C# node for 378K blocks of preview2
testnet
* debugging info produced is compatible with preview2-compatible neo-debugger
* running consensus nodes in heterogeneous setup is possible (2 neo-go CNs
with 2 C# CNs, for example)
Changes specific to neo-go:
* some CLI parameters like wallet path or RPC endpoint URL have been unified
across all commands and thus have changed in some of them (refer to CLI
help for details)
* as an extension we support post-preview2 cosigners parameter for
invokefunction RPC calls (see neo-project/neo-modules#260)
* Go compiler now supports comparisons with nil properly
* we no longer provide bootstrapping 6k block dump for private networks, you
have 30000000 GAS right in the genesis block and it's not hard to make use
of it (see
[neo-go-sc-wrkshp](https://github.com/nspcc-dev/neo-go-sc-wrkshp) for an
example of how to use it)
* we have a conversion tool for your old Neo 2 wallets (`wallet convert`
command), so you can reuse keys on Neo 3 networks
* util.Equals interop function may not function the way you expect it to due
to Neo VM changes, it still is an EQUAL opcode though. This interop may be
removed in the future.
## Older versions
Please refer to the [master-2.x branch
CHANGELOG](https://github.com/nspcc-dev/neo-go/tree/master-2.x/CHANGELOG.md)
for versions prior to 0.90.0 (that are Neo 2 compatible, unlike 0.90.0+ that
are Neo 3 compatible).

8
ROADMAP.md
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@ -7,12 +7,8 @@ functionality.
## Versions 0.7X.Y (as needed)
* Neo 2.0 support (bug fixes, minor functionality additions)
## Version 0.90.0 (June 2020)
* Neo 3.0 features preview (compatible with v3.0.0-preview2)
## Version 0.91.0 (July/August 2020)
* Neo 3.0 features preview (more up to date version, will probably sync with
the next C# implementation preview release)
## Version 0.91.0 (August 2020)
* Neo 3.0-preview3 compatible version.
## Version 1.0 (2020, aligned with NEO 3.0 release)
* full NEO 3.0 support