Overview¶
BNB Beacon Chain is a blockchain developed by the BNB Chain community that implements a vision of a decentralized exchange (DEX) for digital assets. Besides this, Beacon Chain and BSC is a dual-chain structure: Beacon Chain helps to enhance the security of BSC as a staking and governance layer. With the rise of various other forms of Dex, order-book based decentralized exchange was decommissioned in BEP151. With the quick evolution of BSC, the Beacon Chain has become a burden. The cross-chain bridge that connects the two chains slows down the development iteration and always exposes BNB to a certain level of security vulnerabilities. It’s time to take a step further and migrate the functionality of Beacon Chain to BSC, allowing Beacon Chain to retire.
There will be several pahses to retrie Beacon Chain:
- First Sunset Fork - Some types of Beacon chain transactions will be disabled, for example, TimeLockMsg, TimeRelockMsg, FreezeMsg, IssueMsg, MintMsg, IssueMiniMsg, HTLTMsg, DepositHTLTMsg, MsgCreateValidatorOpen, MsgCreateSideChainValidator, MsgCreateSideChainValidatorWithVoteAddr, MsgEditSideChainValidatorWithVoteAddr, MsgSideChainDelegate, MsgSideChainReDelegate.
- BSC Feynman Hardfork - Native validators and staking, native goverenance will be enabled on BNB Smart Chain. The BSC validators/delegators can start migrations after the Feynman upgrade.
- Second Sunset Fork - More Beacon chain transactions will be disabled, for example,MsgSideChainSubmitProposal. All TimeLock and AtomicSwap will automatically be refunded to the user’s wallet. All the BSC delegation will be undelegated automatically.
- Final Sunset Fork - Cross-chain communication between the Beacon Chain and BSC will be completely stopped. ( Estimated time on mainnet: 2024 Sep)
- Post BC Fusion - Beacon Chain will be dumped and and a merkle tree will be generated for recover the assets, which are binded to BSC however not transffered to BSC yet.
All stakholders (e.g., token holders/owners, validators, project owners) should pay attention BNB Chain blog for releated annonuncements and take actions proactively.
For more information about BNB Chain fusion, please refer to BEP-333.
For the roadmap and milestons of BNB Chain fusion, please refer to the blog.