Attention

• SELFDESTRUCT will no longer be refunded
• There are 3 hard forks, node operators need to set them up at the same fork height, i.e. BerlinBlock = 31103030, LondonBlock = 31103030, HertzBlock = 31103030

Description

v1.2.7 is a hard-fork release for BSC testnet.

The testnet is expected to have 3 scheduled hardfork upgrades named Hertz, London, Berlin) at same block height 31,103,030. The current block generation speed forecasts this to occur around 29th Jun 2023. The validators and full node operators on testnet should switch their software version to v1.2.7 before 29th Jun 2023.

The Hertz hardfork will port some of London&Berlin upgrades from Ethereum to BSC for compatiblity. But due to the difference between the 2 networks, there would inevitably has difference in implementation, especially the difference in EIP-1559, the BaseFee will be zero on BSC, so this hard fork will neither introduce new burn mechanism nor the concept of GasTip. In short words, it only provides the interface, but actually no change to the current BSC Gas mechanism.

Here is the list of Hertz upgrade:

• Berlin Upgrades Ported: a.BEP-225: Implement EIP-2565 ModExp Gas Cost b.BEP-229: Implement EIP-2718 Typed Transaction Envelope c.BEP-230: Implement EIP-2929 Gas cost increases for state access opcodes d.BEP-231: Implement EIP-2930: Optional access lists

• London Upgrades Ported: a.BEP-227: Implement EIP-3198: BASEFEE opcode b.BEP-226: Implement EIP-1559 with base fee of 0 c.BEP-228: Implement EIP-3541: Prevent deploying contracts starting with 0xEF d.BEP-212: Implement EIP-3529: Reduction in Refunds

There are many changes with these BEPs, DApp developers & users needs to make sure they clearly understand these changes and the potential impact to their business.

• New transaction types are supported, i.e. AccessList & DynamicFee(1559), by BEP-229, BEP-231, BEP-226
• The gas metering mechanism has been changed, by BEP-225, BEP-230, BEP-212;
• New EVM opcode(BASEFEE) is supported, by BEP-227
• Prevent deploying contracts starting with 0xEF, by BEP-228

Changelog

FEATURE

• #1697 upgrade: block height of Hertz(London&Berlin) on testnet
• #1686 eip3529tests: refactor tests
• #1676 EIP-3529 (BEP-212) Unit tests for Parlia Config
• #1660 feat: add a tool for submitting evidence of maliciousvoting
• #1623 P2P: try to limit the connection number per IP address
• #1608 feature: Enable Berlin EIPs
• #1597 feature: add malicious vote monitor
• #1422 core: port several London EIPs on BSC
• #1717 feat: support creating a bls keystore from a specified private key
• #1720 metrics: add counter for voting status of whole network

IMPROVEMENT

• #1662 consensus, core/rawdb, miner: downgrade logs
• #1654 config: use default fork config if not specified in config.toml
• #1642 readme: update the disk requirement to 2.5TB
• #1621 upgrade: avoid to modify RialtoGenesisHash when testing in rialtoNet

BUGFIX

• #1682 fix: set the signer of parlia to the most permissive one
• #1681 fix: not double GasLimit of block upon London upgrade
• #1679 fix: check integer overflow when decode crosschain payload
• #1671 fix: voting can only be enabled when mining
• #1663 fix: ungraceful shutdown caused by malicious Vote Monitor
• #1651 fix: remove naturally finality
• #1641 fix: support getFilterChanges after NewFinalizedHeaderFilter
• #1645 lightclient: fix validator set change

Assets