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Added: #5699 EIP 2046: Reduced gas cost for static calls made to precompiles.
Added: #5741 Support for individual EIP activation to facilitate EIP-centric network upgrade process.
Added: #5752 #5753 #5809 Implement EIP1380 (reduced gas costs for call-to-self).
Added: #5859 EIP-2384 Istanbul/Berlin Difficulty Bomb Delay and Muir Glacier fork support.
Changed: #5750 Use testeth -t <SUITE_NAME> -- --testfile <PATH> to run the tests from file at any path. Use testeth -t <SUITE_NAME> -- --testfile <PATH> --singletest <TEST_NAME> to run only single test from any file.
Changed: #5801 testeth -t BlockchainTests command now doesn't run the tests for the forks before Istanbul. To run those tests use a separate LegacyTests suite with command testeth -t LegacyTests/Constantinople/BlockchainTests.
Changed: #5807 Optimize selfdestruct opcode in LegacyVM by reducing state accesses in certain out-of-gas scenarios.
Changed: #5806 Optimize selfdestruct opcode in aleth-interpreter by reducing state accesses in certain out-of-gas scenarios.
Changed: #5837 #5839 #5845 #5846 Output format of testeth --jsontrace command changed to better match output of geth's evm tool and to integrate with evmlab project.
Changed: #5848 aleth-vm --codefile <PATH> now reads bytecode file from path and aleth-vm --codefile - <bytecode> now reads bytecode from standard input.
Changed: #5864 Allow a user to send multiple transactions before a new block is mined.
Removed: #5760 Official support for Visual Studio 2015 has been dropped. Compilation with this compiler is expected to stop working after migration to C++14.
Removed: #5840 The list of precompiled contracts is not required in config files anymore.
Removed: #5850 accounts section is now optional in config files.
Fixed: #5792 Faster and cheaper execution of RPC functions which query blockchain state (e.g. getBalance).
Fixed: #5811 RPC methods querying transactions (eth_getTransactionByHash, eth_getBlockByNumber) return correct v value.
Fixed: #5821 test_setChainParams correctly initializes custom configuration of precompiled contracts.
Fixed: #5826 Fix blocking bug in database rebuild functionality - users can now rebuild their databases via Aleth's '-R' switch.
Fixed: #5827 Detect database upgrades and automatically rebuild the database when they occur.
Fixed: #5852 Output correct original opcodes instead of synthetic PUSHC/JUMPC/JUMPCI in VM trace.
Fixed: #5829 web3.eth.getBlock now returns block size in bytes. This requires a (automatic) database rebuild which can take a while depending on how many blocks are in the local chain.
Fixed: #5866 Update output of debug_accountRangeAt and eth_getTransactionCount RPC functions to conform to Geth's output.
Fixed: #5865 Fix bug which causes syncing to become permanently stuck.

Fixed: #5834 Fix segmentation fault during sync.
Fixed: #5841 Revert the change introduced in 1.7.0 to wait 2 secods after sending Disconnect to peer before closing the socket, as it caused instabilty during sync.

Fixed: #5830 Fix cost of ECADD and ECMULL for Istanbul in Mainnet and Ropsten chain configs.

Added: #5537 Creating Ethereum Node Record (ENR) at program start.
Added: #5571 Support Discovery v4 ENR Extension messages.
Added: #5557 Improved debug logging of full sync.
Added: #5564 Improved help output of Aleth by adding list of channels.
Added: #5575 Log active peer count and peer list every 30 seconds.
Added: #5580 Enable syncing from ETC nodes for blocks < dao hard fork block.
Added: #5591 Network logging bugfixes and improvements and add p2pcap log channel.
Added: #5588 Testeth prints similar test suite name suggestions, when the name passed in -t argument is not found.
Added: #5593 Dynamically updating host ENR.
Added: #5624 Remove useless peers from peer list.
Added: #5634 Bootnodes for Rinkeby and Goerli.
Added: #5640 Support EIP-1702 Generalized Account Versioning Scheme (active only in Experimental fork.)
Added: #5691 Istanbul support: EIP-2028 Transaction data gas cost reduction.
Added: #5696 #5708 Istanbul support: EIP-1344 ChainID opcode.
Added: #5700 #5725 Istanbul support: EIP 1884 Repricing for trie-size-dependent opcodes.
Added: #5701 Outputs ENR text representation in admin.nodeInfo RPC.
Added: #5705 Istanbul support: EIP 1108 Reduce alt_bn128 precompile gas costs.
Added: #5707 Aleth waits for 2 seconds after sending disconnect to peer before closing socket.
Added: #5709 #5728 Istanbul support: EIP-2200 Structured Definitions for Net Gas Metering.
Added: #5751 Istanbul support: EIP-152 Add BLAKE2 compression function F precompile.
Added: #5755 testeth now runs stChainId, stSLoadTest, stSelfBalance tests for Istanbul.
Added: #5758 Istanbul support: activation in Ropsten config.
Added: #5762 aleth-vm supports --network Istanbul option.
Changed: #5532 The leveldb is upgraded to 1.22. This is breaking change on Windows and the old databases are not compatible.
Changed: #5559 Update peer validation error messages.
Changed: #5568 Improve rlpx handshake log messages and create new rlpx log channel.
Changed: #5570 Now it's not necessary to recompile with VMTRACE flag to get VM trace log. Just use testeth -- --vmtrace or aleth -v 4 --log-vmtrace.
Changed: #5576 Moved sstore_combinations and static_Call50000_sha256 tests to stTimeConsuming test suite. (testeth runs them only with --all flag)
Changed: #5589 Make aleth output always line-buffered even when redirected to file or pipe.
Changed: #5602 Better predicting external IP address and UDP port.
Changed: #5605 Network logging bugfixes and improvements and add warpcap log channel.
Changed: #5628 Don't try to endlessly reconnect to official Ethereum bootnodes.
Changed: #5632 RocksDB support is disabled by default. Enable with -DROCKSB=ON CMake option.
Changed: #5648 BlockChainTests suite is split into BlockChainTests/ValidBlocks and BlockChainTests/InvalidBlocks.
Changed: #5678 Enable optimizer in aleth-interpreter by default.
Changed: #5675 Disconnect from peer when syncing is disabled for peer.
Changed: #5676 When receiving large batches of new block hashes, process up to 1024 hashes instead of disabling the peer.
Changed: #5719 Enable support for Visual Studio 2017 on Windows.
Changed: #5713 Propagate new blocks after PoW check rather than after import into the blockchain.
Changed: #5734 debug_accountRangeAt RPC method is renamed to debug_accountRange to conform with geth and retesteth requirements.
Changed: #5735 testeth -t GeneralStateTests and testeth -t BCGeneralStateTests commands now don't run the tests for the forks before Istanbul. To run those tests use a separate LegacyTests suite with commands testeth -t LegacyTests/Constantinople/GeneralStateTests and testeth -t LegacyTests/Constantinople/BCGeneralStateTests -- --all
Changed: #5810 [EVMC] has been upgraded to version 7.0.0.
Removed: #5631 Removed PARANOID build option.
Fixed: #5562 Don't send header request messages to peers that haven't sent us Status yet.
Fixed: #5581 Fixed finding neighbour nodes in Discovery.
Fixed: #5599 Prevent aleth from attempting concurrent connection to node which results in disconnect of original connection.
Fixed: #5609 Log valid local enode-address when external IP is not known.
Fixed: #5627 Correct testeth --help log output indentation.
Fixed: #5644 Avoid attempting to sync with disconnected peers.
Fixed: #5647 test_importRawBlock RPC method correctly fails in case of import failure.
Fixed: #5664 Behavior in corner case tests about touching empty Precompiles now agrees with geth's results.
Fixed: #5662 Correct depth value when aleth-interpreter invokes evmc_host_interface::call callback.
Fixed: #5666 aleth-interpreter returns EVMC_INVALID_INSTRUCTION when INVALID opcode is encountered and EVMC_UNKNOWN_INSTRUCTION for undefined opcodes.
Fixed: #5706 Stop tracking sent transactions after they've been imported into the blockchain.
Fixed: #5687 Limit transaction queue's dropped transaction history to 1024 transactions.
Fixed: #5718 Avoid checking contract balance or destination account existence when executing self-destruct operations on Frontier and Homestead.
Fixed: #5803 Client version string reported by RPC and devp2p now better matches the format used by other clients. This will allow aleth to be correctly listed on ethernodes.org.

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