An enterprise-grade Java-based, Apache 2.0 licensed Ethereum client https://wiki.hyperledger.org/display/besu
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besu/CHANGELOG.md

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# Changelog
## 0.8.2
### Removed
- Removed `import-blockchain` command because nothing exports to the required format yet (PR [\#223](https://github.com/PegaSysEng/pantheon/pull/223))
### Bug Fixes
- `io.netty.util.internal.OutOfDirectMemoryError` errors by removing reference counting from network messages.
- Log spam: endless loop in `nioEventLoopGroup` ([#248](https://github.com/PegaSysEng/pantheon/issues/248) thanks to [@5chdn](https://github.com/5chdn) for reporting) (PR [#261](https://github.com/PegaSysEng/pantheon/pull/261))
- Rinkeby import can stall with too many fragments ([#228](https://github.com/PegaSysEng/pantheon/issues/228) thanks to [@steffenkux](https://github.com/steffenkux) and [@5chdn](https://github.com/5chdn) for reporting) (PR [#255](https://github.com/PegaSysEng/pantheon/pull/255))
- Clique incorrectly used the chain ID instead of the network ID in ETH status messages (PR [#209](https://github.com/PegaSysEng/pantheon/pull/209))
- Gradle deprecation warnings (PR [#246](https://github.com/PegaSysEng/pantheon/pull/246) with thanks to [@jvirtanen](https://github.com/jvirtanen))
- Consensus issue on Ropsten:
- Treat output length as a maximum length for CALL operations (PR [#236](https://github.com/PegaSysEng/pantheon/pull/236))
- ECRec precompile should return empty instead of 32 zero bytes when the input is invalid (PR [#227](https://github.com/PegaSysEng/pantheon/pull/227))
- File name too long error while building from source ([#215](https://github.com/PegaSysEng/pantheon/issues/215) thanks to [@5chdn](https://github.com/5chdn) for reporting) (PR [#221](https://github.com/PegaSysEng/pantheon/pull/221))
- Loop syntax in `runPantheonPrivateNetwork.sh` (PR [#237](https://github.com/PegaSysEng/pantheon/pull/237) thanks to [@matt9ucci](https://github.com/matt9ucci))
- Fix `CompressionException: Snappy decompression failed` errors ([#251](https://github.com/PegaSysEng/pantheon/issues/251) thanks to [@5chdn](https://github.com/5chdn) for reporting) (PR [#274](https://github.com/PegaSysEng/pantheon/pull/274))
### Additions and Improvements
- Added `--ropsten` command line argument to make syncing to Ropsten easier ([#186](https://github.com/PegaSysEng/pantheon/issues/186)) (PR [#197](https://github.com/PegaSysEng/pantheon/pull/197) with thanks to [@jvirtanen](https://github.com/jvirtanen))
- Enabled constantinople in `--dev-mode` (PR [#256](https://github.com/PegaSysEng/pantheon/pull/256))
- Supported Constantinople with Clique ([#245](https://github.com/PegaSysEng/pantheon/issues/245) thanks to [@5chdn](https://github.com/5chdn) for reporting) (PR [#250](https://github.com/PegaSysEng/pantheon/pull/250), PR [#247](https://github.com/PegaSysEng/pantheon/pull/247))
- Implemented `eth_chainId` JSON-RPC method ([#206](https://github.com/PegaSysEng/pantheon/issues/206)) (PR [#219](https://github.com/PegaSysEng/pantheon/pull/219))
- Updated client version to be ethstats friendly (PR [#258](https://github.com/PegaSysEng/pantheon/pull/258))
- Added `--node-private-key` option to allow nodekey file to be specified separately to data directory ([#233](https://github.com/PegaSysEng/pantheon/issues/233) thanks to [@peterbroadhurst](https://github.com/peterbroadhurst) for requesting) (PR [#234](https://github.com/PegaSysEng/pantheon/pull/234))
- Added `--banned-nodeids` option to prevent connection to specific nodes (PR [#254](https://github.com/PegaSysEng/pantheon/pull/254))
- Send client quitting disconnect message to peers on shutdown ([#184](https://github.com/PegaSysEng/pantheon/issues/184)) (PR [#253](https://github.com/PegaSysEng/pantheon/pull/253))
- Improved error message for port conflict error (PR [#232](https://github.com/PegaSysEng/pantheon/pull/232))
- Improved documentation by adding the following pages:
* [Getting Started](https://github.com/PegaSysEng/pantheon/wiki/Getting-Started)
* [Network ID and Chain ID](https://github.com/PegaSysEng/pantheon/wiki/NetworkID-And-ChainID)
* [Node Keys](https://github.com/PegaSysEng/pantheon/wiki/Node-Keys)
* [Networking](https://github.com/PegaSysEng/pantheon/wiki/Networking)
* [Accounts for Testing](https://github.com/PegaSysEng/pantheon/wiki/Accounts-for-Testing)
* [Logging](https://github.com/PegaSysEng/pantheon/wiki/Logging)
* [Proof of Authority](https://github.com/PegaSysEng/pantheon/wiki/Proof-of-Authority)
* [Passing JVM Options](https://github.com/PegaSysEng/pantheon/wiki/Passing-JVM-Options)
### Technical Improvements
- Upgraded Ethereum reference tests to 6.0 beta 2. (thanks to [@jvirtanen](https://github.com/jvirtanen) for the initial upgrade to beta 1)
- Set Java compiler default encoding to UTF-8 (PR [#238](https://github.com/PegaSysEng/pantheon/pull/238) thanks to [@matt9ucci](https://github.com/matt9ucci))
- Removed duplicate code defining default JSON-RPC APIs (PR [#218](https://github.com/PegaSysEng/pantheon/pull/218) thanks to [@matt9ucci](https://github.com/matt9ucci))
- Improved code for parsing config (PRs [#208](https://github.com/PegaSysEng/pantheon/pull/208), [#209](https://github.com/PegaSysEng/pantheon/pull/209))
- Use `java.time.Clock` in favour of a custom Clock interface (PR [#220](https://github.com/PegaSysEng/pantheon/pull/220))
- Improve modularity of storage systems (PR [#211](https://github.com/PegaSysEng/pantheon/pull/211), [#207](https://github.com/PegaSysEng/pantheon/pull/207))
- Treat JavaDoc warnings as errors (PR [#171](https://github.com/PegaSysEng/pantheon/pull/171))
- Add benchmark for `BlockHashOperation `as a template for benchmarking other EVM operations (PR [#203](https://github.com/PegaSysEng/pantheon/pull/203))
- Added unit tests for `EthBlockNumber` ([#189](https://github.com/PegaSysEng/pantheon/issues/189)) (PR [#195](https://github.com/PegaSysEng/pantheon/pull/195) thanks to [@jvirtanen](https://github.com/jvirtanen))
- Code style improvements (PR [#196](https://github.com/PegaSysEng/pantheon/pull/196) thanks to [@jvirtanen](https://github.com/jvirtanen))
- Added unit tests for `Web3ClientVersion` ([#191](https://github.com/PegaSysEng/pantheon/issues/191)) (PR [#194](https://github.com/PegaSysEng/pantheon/pull/194) with thanks to [@jvirtanen](https://github.com/jvirtanen))
- Removed RLPUtils from `RawBlockIterator` (PR [#179](https://github.com/PegaSysEng/pantheon/pull/179))
- Replace the JNI based snappy library with a pure-Java version (PR [#257](https://github.com/PegaSysEng/pantheon/pull/257))