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Bitcoin Sovereign Rollup Controversy: Technical Feasibility and Network Impact Spark Heated Discussion
Bitcoin Sovereign Rollup Sparks Controversy: Technical Feasibility Questioned
Recently, an idea about building a sovereign Rollup on the Bitcoin network has sparked widespread discussion within the Bitcoin community. This concept originates from the Rollkit project, which is a modular framework for creating Rollups and has recently announced support for establishing a sovereign Rollup based on the Bitcoin network.
The core of this idea is to leverage the data availability and security guarantees of the Bitcoin network to support Rollup. Theoretically, this not only expands the application scope of Rollup but may also promote the Bitcoin network to form a healthy block space fee market, thereby achieving a more sustainable security budget.
Since the Taproot upgrade, data writing on the Bitcoin network has become easier. The amount of data that can be written in a single transaction has increased from the original 80 bytes to nearly the full block size of 4MB. This change has paved the way for NFT inscriptions and other data-intensive applications.
Rollkit provides an interface for reading and writing data on the Bitcoin network by implementing a Go package called bitcoin-da. This allows developers to integrate Bitcoin as a data availability layer into their projects. To validate this concept, Rollkit also ran an EVM-based sovereign Rollup demonstration on a local Bitcoin test network.
However, this idea has also sparked controversy. Some traditional Bitcoin supporters are concerned that this will further exacerbate congestion on the Bitcoin network. Stanford University professor David Tse points out that even a 4MB block, the total throughput of the Bitcoin network is less than 56 kbits per second, and there is limited space for directly storing data.
Sreeram Kannan, the founder of Eigenlayer, provided a deeper analysis of this concept. He pointed out that while this approach can inherit certain security attributes from the Bitcoin network, it cannot achieve secure asset transfers between the Bitcoin network. Kannan believes that this method may be useful for building NFT or other off-chain interpretation systems based on Bitcoin security, but it is not suitable for securely transferring and using BTC.
In addition, due to the block limit of the Bitcoin network, the performance of this method has also been questioned. To fully ensure Bitcoin-level security, all data needs to be written into the Bitcoin network, which means the data rate is limited to about 53kbps.
Nevertheless, Kannan pointed out that theoretically, a secure cross-chain bridge with other blockchains can be established by implementing BTC light client cross-chain bridges and ZK proof validators on the receiving chain (such as Ethereum).
Overall, while the concept of Bitcoin sovereign Rollup has sparked interest, its actual application value and technical feasibility remain contentious. This discussion highlights the complexity of balancing security, performance, and functionality in the development of blockchain technology.