Constellation

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)