Efficient Logging for Blockchain Applications
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by
Christopher Klinkmüller, Ingo Weber, Alexander Ponomarev, An Binh
Tran, Wil van der Aalst
2020
Abstract
Second generation blockchain platforms, like Ethereum, can store arbitrary
data and execute user-defined smart contracts. Due to the shared nature of
blockchains, understanding the usage of blockchain-based applications and the
underlying network is crucial. Although log analysis is a well-established
means, data extraction from blockchain platforms can be highly inconvenient and
slow, not least due to the absence of logging libraries. To close the gap, we
here introduce the Ethereum Logging Framework (ELF) which is highly
configurable and available as open source. ELF supports users (i) in generating
cost-efficient logging code readily embeddable into smart contracts and (ii) in
extracting log analysis data into common formats regardless of whether the code
generation has been used during development. We provide an overview of and
rationale for the framework's features, outline implementation details, and
demonstrate ELF's versatility based on three case studies from the public
Ethereum blockchain.
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