Original: " ZK rollups on Ethereum vs. ZK rollups on Bitcoin "
The way Bitcoin and Ethereum store user data (or "state"), and the way smart contracts interact with said data, are very different. Because Bitcoin adopts the UTXO model, while Ethereum adopts an account-based model.
In addition, the mechanisms for securing L1 Rollup deployed on each network differ significantly.
Rollup on the Lightning Network
Rollup are gradually gaining popularity on the Ethereum network.
If Rollup is adopted on Bitcoin, we will have a payment network that is more likely to succeed than the current Lightning Network.
Comparing the two can be difficult because they serve different purposes.
To get a clearer idea, it might help to think in terms of liquidity and user numbers . Thousands of Lightning nodes are currently active on the network. Some of them are hosted, meaning they have customers using their services. However, it is difficult to say how many users there are in total, making it impossible to know how many transactions are being made over the Lightning Network at any one time.
In some cases, Rollup may be a more viable option than others. For example, you want to make offline payments without inflowing Liquidity or channel restrictions. However, if what you need is high-volume and high-volume and low-cost transactions, such as micro or nanopayments, then state channels such as the Lightning Network are likely to be a better choice.
P2P or B2B payments may be the most suitable for Rollup, because they provide users with a smoother experience. It also depends on what type of payment we're talking about -- certain types of payment methods may be better suited for Rollup designed specifically for them.
Rollup Potential
Multi-signatures are used to secure Rollups, not prototypical consensus like Layer 1.
Rollups have a single block producer, rather than multiple block producers, which means users may have to wait 24 or 48 hours for their funds to be available.
While people are still working on tools to manage the Lightning Network and user experience, Rollups may address these issues. Rollups improve trust, security, and uptime. Even so, the underlying blockchain has its challenges - we keep running into bugs. It's possible, though, that we're getting closer to developing a system that works for everyone in the future.
Use cases show that Rollups currently outperform the Lightning Network or other layer 2 protocols available on Bitcoin today.
What can be done with ZK rollups that cannot be done on Bitcoin Layer1?
Various applications can be done on ZK Rollup .
For example, it is beneficial for any blockchain ecosystem to have a live application, and the way to do this is to start with Stablecoin. If you can develop a generally accepted Stablecoin payment rail, it will be much simpler to introduce your token down the road.
Suppose the Lightning Network becomes the preferred method of transferring Stablecoin- in which case Bitcoin would have an advantage over Ethereum.
However, if Rollup become the primary solution for ethereum’s mobile Stablecoin, it will also be easier to move ether discreetly.
If you want to send Stablecoin over the Lightning Network, it will take some effort. The solution is to swap the Stablecoin back and forth with Bitcoin multiple times to complete the payment, which of course means charging a transaction fee. This first exposed a problem with using the Lightning Network. ZK Rollup on Bitcoin can come in handy here as they also have the ability to transfer tokens which will be of great use to users.
What does it take to incorporate ZK Rollup into Bitcoin?
The good news is that it doesn't require a Hard fork , even if new OP code is required.
If you want to stay in the network and consensus, old nodes don't need to update their software, they can still send and receive tokens with other nodes that have been upgraded and use the new OP code.
Bitcoin has successfully done this type of Soft fork before, so we shouldn't be too worried right now.
Next step?
Many experiments will be required before we can determine what needs to be changed to implement ZK Rollup on Bitcoin.
If one decides to go for a Soft fork, there are many possible benefits. For example, if we Soft fork for validity Rollup, this will unlock other potential use cases and allow the network to use the OP code for different purposes.
The developers are already hard at work on the testnet, and various researchers will be running multiple experiments to make sure everything runs smoothly and benefits users as much as possible.
