BenFen Bridge is a native cross-chain bridge launched on this sub-chain. It is a secure, decentralized, and scalable cross-chain aggregation solution that supports not only the asset cross-chain needs of mainstream public chains but also effectively provides security alerts and risk isolation for high-risk tokens. As a native cross-chain bridge, BenFen Bridge shares security with the BenFen chain, and its code is built into the BenFen chain without additional trust assumptions.
BenFen Bridge adopts a locking and casting core mechanism:
Lock native assets (such as USDC/USDT) to smart contracts on Ethereum.
Mint or destroy corresponding assets (such as BUSD) on the BenFen chain according to the direction of asset flow.
Key components
BenFen Bridge Committee comprises active validators on the BenFen chain responsible for observing, verifying, and signing cross-chain events. They approve contract upgrades and emergency governance requests for Solidity (Ethereum) and Move (BenFen chain).
Smart contract
Ethereum: Solidity contract that handles asset locking. BenFen chain: Move contract responsible for asset minting and destruction.
Full Node
Running on the Ethereum and BenFen chains, listening for cross-chain events, providing verification information, and supporting nodes and clients.
Cross-Chain Client
User interaction interface: To complete cross-chain operations, submit transaction information and collect node signatures (more than 1/3 of the pledged funds are required).
To ensure safety, BenFen Bridge takes the following measures:
Replay protection
Each transaction uses a random number (nonce) to prevent replay attacks.
Cross-chain finality confirmation
Ethereum to BenFen chain: requires 2 cycles (about 13 minutes) for confirmation, reducing the risk of restructuring.
BenFen Chain to Ethereum: Completed in seconds, fast and efficient.
Committee management
The committee updates with the BenFen chain epoch, and validators rotate keys.
Committee information is stored in the Ethereum contract, and updates require more than 1/3 of the voting rights.
Contract upgrade
BenFen Chain Contract: Requires approval from 2/3 of validators.
Ethereum contract: requires approval from 1/2 of the validators.
Emergency suspension
Operations can be quickly suspended in the face of catastrophic events.
Lifting the suspension requires the consent of more than 1/2 of the pledged funds.
Cross-chain two-way exchange
BenFen provides another way for users to obtain BUSD based on BenFen Bridge so that other users on the chain can do so more conveniently and quickly:
Cross-chain bidirectional exchange mechanism between USDC/USDT and BUSD:
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When entering, your USDC/USDT will be exchanged for BUSD at a 1:1 ratio.
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When exiting, users can still exchange their BUSD for USDC or USDT at a 1:1 ratio to their address on the target chain.
BenFen Bridge achieves secure and efficient cross-chain operations through locking and casting mechanisms, decentralized committee management, innovative contract collaboration, and multiple security measures. Its native design is deeply integrated with the BenFen chain, supporting mainstream asset cross-chain and providing risk isolation, laying a solid foundation for the BenFen ecosystem.