[ZK Stack] - How to acheive interchain operatability?

[sachanayush47]

Team or Project

No response

Module Affected

• System contracts (era-system-contracts)
• Smart contracts (era-contracts)
• zkEVM (era-zk_evm)
• Server (zksync-era)
• Prover (era-boojum)
• Fee withdrawer (era-fee-withdrawer)
• Block Explorer (clock-explorer)
• Portal - Wallet + Bridge (dapp-portal)
• Other (please specify below)

Rust Version

1.82.0

Operating System

• Ubuntu
• MacOS
• Windows
• Other (Please specify below)

Issue Description

We have multiple chains running under ecosystem with different configuration. We want to achieve interoperability for enhanced UX, users should be able to deposit and withdraw asset. We came to know about 2 things: HyperBridge and Interop but we are not sure which one is exactly used HyperBridge or Interop as both seems to offer similar functionality and what all things we need to setup to have this?

Expected Behavior

NA

Current Behavior

NA

Repository Link (if applicable)

No response

Additional Details

No response

Prior Research

• Yes, I searched for similar issues and did not find any matching ones.

[gleenai[bot]]

To achieve interchain operability within your ecosystem using ZKsync, you can explore both the HyperBridge and Interop functionalities, as they cater to different aspects of cross-chain interactions:

1. HyperBridge: This is designed for verifying transactions across chains using Merkle proofs. It involves a series of steps including transaction initiation on a ZK chain, settlement on Ethereum's Layer 1, and transaction verification and execution on the receiving ZK chain. This process is ideal for unifying liquidity and ensuring secure asset transfers across different chains within the ecosystem.

2. Interop: This functionality allows for seamless interaction between different chains, although it does not synchronize the chains fully (e.g., the same address may have different balances on different chains). Interop is more about enabling communication and interaction rather than mirroring state or balances across chains.

For setting up these functionalities, you will need to:

• Ensure that your system contracts and smart contracts are capable of handling cross-chain transactions.
• Set up the necessary infrastructure on your server and possibly adjust your zkEVM configurations to support these features.

For detailed guidance on setting up and choosing between HyperBridge and Interop based on your specific needs, you might want to refer to the respective documentation on HyperBridge and Interop.

For more in-depth discussion and community support, you can visit the ZKsync developers discussions on Github.

Your feedback helps us serve you better. If this fully addresses your question, please give it a thumbs up. If it doesn't, please give it a thumbs down. This will inform the community and team so we can improve our support.

[MexicanAce]

Hi @sachanayush47 👋 , Interop functionality is under active development and there's currently a working alpha version for ZKsync Era Sepolia Testnet and Sophon (a ZK chain) Testnet.

However, for local ecosystems and local development, the team is working on updates to zkstack and local dev for others to also try out Interop. We'll post updates in our docs and on our socials when this functionality is more readily available.