Conflux v2.3.0

This release introduces a new hardfork. All nodes should be upgraded before the epoch number reaches 79050000 (estimated on Sep 07). Most CIPs will be enabled when the block number reaches 188900000 (estimated on Sep 09), and CIP-113 will be enabled when the PoS block number reaches 766200 (estimated on Sep 09).

Incompatible Changes

• CIP-107 (https://github.com/Conflux-Chain/CIPs/blob/master/CIPs/cip-107.md): This CIP introduces "storage point" a burning mechanism of storage collateral.
• CIP-112 (https://github.com/Conflux-Chain/CIPs/blob/master/CIPs/cip-112.md): This CIP fixes the incorrect encoding and decoding implementation of the custom field of block headers.
• CIP-113 (https://github.com/Conflux-Chain/CIPs/blob/master/CIPs/cip-113.md): This CIP makes the PoS finalization faster by shortening the PoS consensus round time and the pivot decision signing wait time
• CIP-118 (https://github.com/Conflux-Chain/CIPs/blob/master/CIPs/cip-118.md): This CIP introduces an internal contract interface to query unused storage points.
• CIP-119 (https://github.com/Conflux-Chain/CIPs/blob/master/CIPs/cip-119.md): This CIP introduces the PUSH0 (0x5f) instruction as EIP-3855.

RPC Changes

• Change RPC names cfx_getTransactionsByEpoch and cfx_getTransactionsByBlock to debug_getTransactionsByEpoch and debug_getTransactionsByBlock respectively to be consistent with the debug namespace.
• Use hex format for pos RPC data.
• Add RPC pos_getLedgerInfoByBlockNumber and pos_getLedgerInfoByEpochAndRound to get PoS ledger infos.
• Add debug_getEpochReceiptProofByTransaction to get epoch receipt proof.
• Add include_eth_recepits option (default to false) for cfx_getEpochReceipts.
• Fix the hex encoding of PoS keys and signatures in pos RPCs.
• Return both compressed and uncompressed BLS public keys in PoS ledger info.

Improvements

• Fix a performance issue that some requests never expire.
• Add metrics for filter and pubsub API.
• Refactor the EVM code to improve readability.