human: Given a hyperedge-centered hypergraph: <hypergraph>, where the center hyperedge is induced by one source paper and its member nodes are the cited papers.

Details of the hypergraph:
Center hyperedge (induced by source paper "transactional smart contracts in blockchain systems"):
  Abstract: This paper presents TXSC, a framework that provides smart contract developers with transaction primitives. These primitives allow developers to write smart contracts without the need to reason about the anomalies that can arise due to concurrent smart contract function executions.

Includes members:
  Member "atomic commitment across blockchains":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "distributed cross blockchain transactions")
  Member "cross chain deals and adversarial commerce":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "pigpaxos devouring the communication bottlenecks in distributed consensus")
  Member "towards global asset management in blockchain systems":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "atomic commitment across blockchains")
  Member "exploiting the laws of order in smart contracts":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "ae gis shielding vulnerable smart contracts against attacks")
  Member "atomic cross chain swaps":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "throughput optimal routing in blockchain based payment systems")
  Member "a concurrent perspective on smart contracts":
    also connected through other hyperedges:
      - Hyperedge HE-6 (induced by source paper "an overview on smart contracts challenges advances and platforms")
  Member "adding concurrency to smart contracts":
    also connected through other hyperedges:
      - Hyperedge HE-7 (induced by source paper "an overview on smart contracts challenges advances and platforms")

Question: Please tell me which class the source paper belongs to. The 40 classes are: cs.NA(Numerical Analysis), cs.MM(Multimedia), cs.LO(Logic in Computer Science), cs.CY(Computers and Society), cs.CR(Cryptography and Security), cs.DC(Distributed, Parallel, and Cluster Computing), cs.HC(Human-Computer Interaction), cs.CE(Computational Engineering, Finance, and Science), cs.NI(Networking and Internet Architecture), cs.CC(Computational Complexity), cs.AI(Artificial Intelligence), cs.MA(Multiagent Systems), cs.GL(General Literature), cs.NE(Neural and Evolutionary Computing), cs.SC(Symbolic Computation), cs.AR(Hardware Architecture), cs.CV(Computer Vision and Pattern Recognition), cs.GR(Graphics), cs.ET(Emerging Technologies), cs.SY(Systems and Control), cs.CG(Computational Geometry), cs.OH(Other Computer Science), cs.PL(Programming Languages), cs.SE(Software Engineering), cs.LG(Machine Learning), cs.SD(Sound), cs.SI(Social and Information Networks), cs.RO(Robotics), cs.IT(Information Theory), cs.PF(Performance), cs.CL(Computation and Language), cs.IR(Information Retrieval), cs.MS(Mathematical Software), cs.FL(Formal Languages and Automata Theory), cs.DS(Data Structures and Algorithms), cs.OS(Operating Systems), cs.GT(Computer Science and Game Theory), cs.DB(Databases), cs.DL(Digital Libraries), cs.DM(Discrete Mathematics). Directly output the class name.

gpt: cs.DB(Databases)