To node operators and miners:

Please upgrade your node before Epoch Number reaches 55095000 or Block Number reaches 68845000 (around 10:00 Dec.9th, 2021(GMT+8)).

Please add pos_config (will be updated here after Dec.11 at 18:00) before Epoch Number reaches 55665000 (around Dec.13th 15:00).

If the binary cannot start, you can choose to compile the binary on your own platform or use the compatible version. Note that the compatible version has poorer performance and requires better hardware to run stably(>4 cores).

Incompatible Changes

• CIP-43：https://github.com/Conflux-Chain/CIPs/blob/master/CIPs/cip-43.md
• CIP-64：https://github.com/Conflux-Chain/CIPs/blob/master/CIPs/cip-64.md
• CIP-71：https://github.com/Conflux-Chain/CIPs/blob/master/CIPs/cip-71.md
• CIP-72：https://github.com/Conflux-Chain/CIPs/blob/master/CIPs/cip-72.md
• CIP-76：https://github.com/Conflux-Chain/CIPs/blob/master/CIPs/cip-76.md
• CIP-78：https://github.com/Conflux-Chain/CIPs/blob/master/CIPs/cip-78.md
• CIP-86：https://github.com/Conflux-Chain/CIPs/blob/master/CIPs/cip-86.md

RPC Improvements

PoS RPC

Added a new group of PoS-related methods with a prefix of pos. Current information about the PoS chain can be acquired using these methods.

PoW RPC

Hardfork PoW RPC Changes

• Added a new field in the block structure:
  • posBlockHash： the hash of the PoS latest block at the time when the PoW block is mined

New Tag

• Added a new epochNumber tag:
  • latestFinalized：the latest finalized block

New RPC

• Added a new RPC method to view the current overall economics information of PoS:
  • cfx_posEconomics
• txpool-related RPC
  • Added a new group of txpool-related RPC methods with a prefix of txpool which can be used to view various kinds of information regarding the current transaction pool.

Bug Fixes

Fixed a bug that may slow down the syncing process for archive nodes.