Resilient Gateway-Based N-N Cross-Chain Asset Transfers

Augusto, André; Belchior, Rafael; Vasconcelos, André; Hardjono, Thomas

doi:10.36227/techrxiv.20016815.v1

“…In the worst-case scenario, the rollback procedure is triggered if there is no communication beyond a defined timeout. An earlier analysis of the recovery and rollback procedure showed that the rollback is very costly and should be avoided as much as possible -it represents 38% of the total latency, compared to 0.5% when running the recovery procedure alone [6]. Hence, a conclusion from this work is that "if we guarantee a backup gateway for each gateway running ODAP, the recovery procedure is always triggered to the detriment of the rollback."…”

Section: Failure Modelmentioning

confidence: 87%

CBDC bridging between Hyperledger Fabric and permissioned EVM-based blockchains

Augusto¹,

Belchior²,

Vasconcelos³

et al. 2023

Preprint

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The last few years have seen a steep increase in blockchain interoperability research. Most solutions connect public blockchains; hence, the main cross-chain use case is token transfer. By-design platform transparency, tamper-resistance, and auditability make blockchains an infrastructure candidate for Central Bank Digital Currencies (CBDCs), but bridging CBDCs is an important missing piece in general. In this paper, we leverage an asset transfer protocol, ODAP/SATP, to define an extendable and dependable blockchain interoperability middleware that can bridge CBDC from Hyperledger Fabric to EVM-based permissioned blockchains. The key interoperation enabler in the solution is a shared asset definition enforced by both sides of the bridge, accompanied by a mapping between Fabric Identities and Ethereum addresses for Identity management. We implement our design for the CBDC use case utilizing Hyperledger Cactus. Through a preliminary performance evaluation, we show that the underlying ledgers heavily influence the latency of the solution, not the bridging components.

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“…Lee et al explored a systematization of cross-chain bridge hacks that supports our modelling of double spend [41]. Although some work on bridge security has been done recently [44], [47]- [52], the space still needs systematization. Our work puts forward the cross-chain model, a concept that unites the several efforts in the area.…”

Section: A Bridge Hacks and Monitoringmentioning

confidence: 99%

Hephaestus: Modelling, Analysis, and Performance Evaluation of Cross-Chain Transactions

Belchior¹,

Somogyvari²,

Pfannschmid³

et al. 2023

Preprint

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Ecosystems of multiple blockchains are now a reality. Multi-chain applications and protocols are perceived as necessary to enable scalability, privacy, and composability. Despite being a promising emerging research area, we recently have witnessed many attacks that have caused billions of dollars in losses. Attacks against bridges that connect chains are at the top of such attacks in terms of monetary cost, and no apparent solution seems to emerge from the ongoing chaos. In this paper, we present our contribution to minimizing bridge attacks. In particular, we explore the concepts of cross-chain transaction, cross-chain logic, and the cross-chain state as the enablers of the cross-chain model. We propose Hephaestus, the first cross-chain model generator that captures the operational complexity of cross-chain applications. Hephaestus can generate cross-chain models from local transactions on different ledgers realizing arbitrary use cases and allowing operators to monitor their cross-chain applications. Monitoring helps identify outliers and malicious behavior, which can help programmatically to stop bridge hacks and other attacks. We conduct a detailed evaluation of our system, where we implement a cross-chain bridge use case. Our experimental results show that Hephaestus can process 600 cross-chain transactions in less than 5.5 seconds in an environment with two blockchains and requires sublinear storage.

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“…Hence, a conclusion from this work is that "if we guarantee a backup gateway for each gateway running ODAP, the recovery procedure is always triggered to the detriment of the rollback." [6]. This gives us some confidence in the performance of the protocol when the necessary infrastructure is provided, e.g., multiple gateways can serve as backups to one another.…”

Section: Failure Modelmentioning

confidence: 99%

CBDC bridging between Hyperledger Fabric and permissioned EVM-based blockchains

Augusto¹,

Belchior²,

Vasconcelos³

et al. 2023

Preprint

1

0

View full text Add to dashboard Cite

The last few years have seen a steep increase in blockchain interoperability research. Most solutions connect public blockchains; hence, the main cross-chain use case is token transfer. By-design platform transparency, tamper-resistance, and auditability make blockchains an infrastructure candidate for Central Bank Digital Currencies (CBDCs), but bridging CBDCs is an important missing piece in general. In this paper, we leverage an asset transfer protocol, ODAP/SATP, to define an extendable and dependable blockchain interoperability middleware that can bridge CBDC from Hyperledger Fabric to EVM-based permissioned blockchains. The key interoperation enabler in the solution is a shared asset definition enforced by both sides of the bridge, accompanied by a mapping between Fabric Identities and Ethereum addresses for Identity management. We implement our design for the CBDC use case utilizing Hyperledger Cactus. Through a preliminary performance evaluation, we show that the underlying ledgers heavily influence the latency of the solution, not the bridging components.

show abstract

Resilient Gateway-Based N-N Cross-Chain Asset Transfers

Cited by 6 publications

References 13 publications

CBDC bridging between Hyperledger Fabric and permissioned EVM-based blockchains

CBDC bridging between Hyperledger Fabric and permissioned EVM-based blockchains

Hephaestus: Modelling, Analysis, and Performance Evaluation of Cross-Chain Transactions

CBDC bridging between Hyperledger Fabric and permissioned EVM-based blockchains

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