  As the significance of blockchain innovation grows and the focus on
scalability intensifies, rollup technology has emerged as a promising approach
to tackle these scalability concerns. Nonetheless, rollups encounter
restrictions when interacting with other rollups, leading to diminished
throughput, increased latency, higher fees, and a complex user experience in
transactions between rollups. In this paper, we put forth a novel system that
employs batch settlement techniques to augment the efficiency of transfers
between rollups. Our proposed system comprises a settlement rollup responsible
for batch settling transfers among rollups and a smart contract structure that
carries out the settlements. Notably, we utilize a zero-knowledge proof
algorithm to guarantee the computational integrity of the settlement rollup
while ensuring security through Ethereum smart contracts for proof verification
and settlement execution. By implementing this approach, the proposed system
can effectively and securely execute asset transfers between rollups,
ultimately improving their scalability and usability. Consequently, our
research provides a fresh perspective on resolving the challenges of
throughput, latency, and fees associated with transfer systems.
