Parity Ethereum 2.3.0-beta

Parity-Ethereum 2.3.0-beta is a consensus-relevant security release that reverts Constantinople on the Ethereum network. Upgrading is mandatory for Ethereum, and strongly recommended for other networks.

• Consensus - Ethereum Network: Pull Constantinople protocol upgrade on Ethereum (#10189)
  • Read more: Security Alert: Ethereum Constantinople Postponement
• Networking - All networks: Ping nodes from discovery (#10167)
• Wasm - Kovan Network: Update pwasm-utils to 0.6.1 (#10134)

Other notable changes:

• Existing blocks in the database are now kept when restoring a Snapshot. (#8643)
• Block and transaction propagation is improved significantly. (#9954)
• The ERC-191 Signed Data Standard is now supported by personal_sign191. (#9701)
• Add support for ERC-191/712 eth_signTypedData as a standard for machine-verifiable and human-readable typed data signing with Ethereum keys. (#9631)
• Add support for ERC-1186 eth_getProof (#9001)
• Add experimental RPCs flag to enable ERC-191, ERC-712, and ERC-1186 APIs via --jsonrpc-experimental (#9928)
• Make CALLCODE to trace value to be the code address. (#9881)

Configuration changes:

• The EIP-98 transition is now disabled by default. If you previously had no eip98transition specified in your chain specification, you would enable this now manually on block 0x0. (#9955)
• Also, unknown fields in chain specs are now rejected. (#9972)
• The Tendermint engine was removed from Parity Ethereum and is no longer available and maintained. (#9980)
• Ropsten testnet data and keys moved from test/ to ropsten/ subdir. To reuse your old keys and data either copy or symlink them to the new location. (#10123)
• Strict empty steps validation (#10041)
  • If you have a chain withempty_steps already running, some blocks most likely contain non-strict entries (unordered or duplicated empty steps). In this release strict_empty_steps_transition is enabled by default at block 0x0 for any chain with empty_steps.
  • If your network uses empty_steps you must (A) plan a hard fork and change strict_empty_steps_transition to the desired fork block and (B) update the clients of the whole network to 2.2.7-stable / 2.3.0-beta. If for some reason you don't want to do this please setstrict_empty_steps_transition to 0xfffffffff to disable it.

Note: This release marks Parity 2.3 as beta. All versions of Parity 2.2 are now considered stable.

System	Architecture	Binary	SHA256 Checksum
	x64	parity.exe	87185e622515a4eca2c6d44373865d669941fb7b6253a8b16699eabaf4acd94b
	x64	parity	71822ac980ada2e4bce20c38c2f2ebb3c3d9db5e52723a1c7b0c0679bc95455b
	x64	parity	c55c0c1ee397c7a1999ff8e19f9f91caf1b93e239a2a4fc85f57d18eb934f63b
System	Option	-	Resource
	Homebrew	-	github.com/paritytech/homebrew-paritytech
	Docker	-	hub.docker.com/r/parity/parity
	All binaries	-	vanity-service.parity.io/parity-binaries?version=v2.3.0

The full list of included changes can be found in the CHANGELOG.