Bittime - To support the Haber and Tycho hard fork on BNB Chain, zkBridge introduced a new Hash Withdrawals field, which increases efficiency and functionality without changing the contract. Changes to BlockHash calculation and verification logic are part of this update.
ZkBridge Supports BNB Chain Haber and Tycho Hard Fork
Foresight News reports that zkBridge, a cross-chain bridge, is designed to support the Haber and Tycho BNB Chain hard forks. This upgrade will make several changes to the bridge.
In the block title there will be a new field called Withdrawals Hash, which will change the BlockHash calculation logic. The logic associated with BlockHash verification in the circuit will be updated to include the new fields added to the BlockHash calculation.
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zkBridge Update Expected to Improve Functionality
Additionally, this update is expected to improve zkBridge's functionality and efficiency, thereby enhancing its role in the blockchain ecosystem. However, this change will not impact the zkBridge contract. Instead, a new transaction type, BlobTxType, will be introduced.
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What is ZkBridge?
zkBridge consists of a relay network of block headers and updater contracts, and zkSNARKs allow convincing proof of the receiving chain that a particular state transition occurred in the sending chain.
The block header relay network takes the block header from the sending chain, creates a proof that the header and proof are valid, and then sends the header and proof to the updating contract, which is set on the receiving chain.
The renewal contract protects the client's status. automatically updates the main chain of the sending chain and adds block headers once the corresponding proof is verified.
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Conclusion
A cross-chain bridge called zkBridge will support the Haber and Tycho hard fork on BNB Chain. With this upgrade, there are changes to the bridge. In the block title, there is a new field called Withdrawals Hash. This will change the BlockHash calculation logic. Additionally, the BlockHash verification logic in the circuit will also be updated to include this new field. This update is also expected to improve zkBridge's efficiency and functionality without changing its contract. A new transaction type BlobTxType was added as another change.
To prove state transitions from the sending chain to the receiving chain, zkBridge consists of a relay network of block headers and updating contracts that use zkSNARKs. The relay network takes the block header from the sending chain, creates a validity proof, and then sends it to the updating contract on the receiving chain. Once the header is added, the updater contract automatically updates the client state.
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