Can We Share the Same Perspective? Blockchain Interoperability with Views

Abstract

<p>Distributed ledger technology (DLT) provides decentralized and tamper-resistant data storage, replicated among mutually untrusting participants. With the advancement of this technology, different privacy-preserving blockchains have been proposed, such as Corda, Hyperledger Fabric, and Digital Asset's Canton. These distributed ledgers only provide \emph{partial consistency}, which implies that participants can view the same ledger differently. </p> <p>A \emph{view} represents the states of a blockchain available to a particular stakeholder. The combination of views forms an integrated view that represents a consistent global state shared by all participants. </p> <p>This paper introduces BUNGEE (Blockchain UNifier view GEnErator), the first DLT view generator, to allow capturing DLT snapshots, constructing views, and performing arbitrary operations on those, such as integrating views. Creating and integrating views allows interesting applications, such as stakeholder-centric snapshots for audits, cross-chain analysis, blockchain migration, and data analytics.</p>

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

“…A blockchain is a distributed protocol in which a group of nodes collectively maintains a ledger L of ordered transactions, possibly grouped into blocks [29]. Blockchains support two basic operations: reads and writes.…”

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

“…From the Blockchain View Integration Framework [2], a local transaction t is a tuple: t ≡ (tid, t, target, payload, σ K p s (tid, t, target, payload))…”

“…Cross-chain applications are structured as multi-step protocols, where there are different types agents. Agents are users (e.g., end-users, relayers [2], or protocol administrators), and smart Users take turns doing off-chain processing and interacting with one or more domains (e.g., submit transactions against smart contracts). Agents are considered Byzantine, i.e., they can to deviate from a protocol.…”

“…On the other hand, BUNGEE is a general-agnostic framework that inspires this work. In this paper, a tool that produces consolidated views over user activity on different blockchains [2] is proposed. Hephaestus can complement BUNGEE to generate metrics, protocol behavior patterns, and individual user activity.…”

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

“…BUNGEE [8] is a view generator that captures snapshots from ledgers, to build integrated views of the global state of networks. In the gateway-based architecture, one gateway might not be allowed to look at the internal data of the other gateway's blockchain.…”