Bigchaindb

Security

Several dependencies updated including Flask that had vulnerability.

Fixed

* Updated priv_validator key format in stack script (2707)

External Contributors

* aostrun - [2708](https://github.com/bigchaindb/bigchaindb/pull/2708)

Fixed

Gevent library API update is incompatible with bigchaindb-abci 1.0.1 version.
Updated bigchaindb-abci.

Added

Support for multiple ABCI versions.

Added

Option for last transaction retrieval added.

Added

Completed the implementation of chain-migration elections (BEP-42). Pull requests [2553](https://github.com/bigchaindb/bigchaindb/pull/2553), [2556](https://github.com/bigchaindb/bigchaindb/pull/2556), [2558](https://github.com/bigchaindb/bigchaindb/pull/2558), [2563](https://github.com/bigchaindb/bigchaindb/pull/2563) and [2566](https://github.com/bigchaindb/bigchaindb/pull/2566)

Changed

* Code that used the Python driver's (deprecated) transactions.send() method now uses its transactions.send_commit() method instead. [Pull request 2547](https://github.com/bigchaindb/bigchaindb/pull/2547)
* Code that implied pluggable "consensus" now implies pluggable transaction "validation" (a more accurate word). [Pull request 2561](https://github.com/bigchaindb/bigchaindb/pull/2561)

Removed

Benchmark logs. [Pull request 2565](https://github.com/bigchaindb/bigchaindb/pull/2565)

Fixed

A bug caused by an incorrect MongoDB query. [Pull request 2567](https://github.com/bigchaindb/bigchaindb/pull/2567)

Notes

There's now better documentation about logs, log rotation, and the `server.bind` config setting. Pull requests [2546](https://github.com/bigchaindb/bigchaindb/pull/2546) and [2575](https://github.com/bigchaindb/bigchaindb/pull/2575)