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1. 发明申请

WO2020249572A1 METHOD AND CONTRACT REWRITING FRAMEWORK SYSTEM FOR SUPPORTING SMART CONTRACTS IN A BLOCKCHAIN NETWORK 审中-公开
公开(公告)号：WO2020249572A1
公开(公告)日：2020-12-17
申请号：PCT/EP2020/065993
申请日：2020-06-09
申请人： NEC LABORATORIES EUROPE GMBH
发明人： RODLER, Michael , DAVI, Lucas , KARAME, Ghassan , LI, Wenting
IPC分类号： G06F21/51 , G06F21/56 , G06F21/64 , H04L29/06 , G06Q20/06
摘要： A method for A method for supporting smart contracts in a blockchain network, wherein the blockchain network is a distributed blockchain network having nodes, wherein each node that validates transactions runs a virtual machine for executing a smart contract, wherein a contract rewriting framework system is provided, wherein said contract rewriting framework system comprises a vulnerability detection tool, a rewriter tool and a deployment component, the method comprising: obtaining, by the deployment component, a permission to upgrade a smart contract, wherein said permission is granted to the deployment component by a creator and/or owner of the smart contract during a creation phase of the smart contract; retrieving, by the contract rewriting framework system, the smart contract from the blockchain network, wherein the smart contract is passed to the vulnerability detection tool; detecting, by the vulnerability detection tool, a vulnerability in the smart contract, wherein the vulnerability detection tool determines a type of the vulnerability and an instruction location of the vulnerability; rewriting, by the rewriter tool, the smart contract to include a patch for fixing the vulnerability, wherein a patched smart contract is generated by the rewriter tool based on the type of the vulnerability and the instruction location of the vulnerability; issuing, by the deployment component, an upgrade transaction including the patched smart contract to the blockchain network, such that the patched smart contract is deployed in the blockchain network. Furthermore, a corresponding contract rewriting framework system is disclosed.

2. 发明申请

WO2022078632A1 METHOD AND SYSTEM FOR SUPPORTING SMART CONTRACTS IN A BLOCKCHAIN NETWORK 审中-公开
公开(公告)号：WO2022078632A1
公开(公告)日：2022-04-21
申请号：PCT/EP2021/054838
申请日：2021-02-26
申请人： NEC LABORATORIES EUROPE GMBH
发明人： GIESEN, Jens-rene , RODLER, Michael , DAVI, Lucas , ANDREINA, Sébastien , KARAME, Ghassan
IPC分类号： G06F21/57 , G06F21/56 , G06F21/64
摘要： A computer-implemented method for supporting smart contracts in a blockchain network, the method comprising: translating a source code of a smart contract into an abstract syntax tree model; generating a code property graph based on the abstract syntax tree model; performing an enrichment phase, wherein the code property graph is enriched with information that is inferable from the abstract syntax tree model; performing a vulnerability detection phase, wherein the code property graph is checked for one or more predetermined vulnerability patterns in order to find one or more predetermined vulnerabilities; and performing a vulnerability patching phase, wherein one or more patches are applied in order to fix vulnerabilities found in the vulnerability detection phase, wherein the patches are inserted into the code property graph such that a patched code property graph is generated. Furthermore, a corresponding computer system for supporting smart contracts in a blockchain network is disclosed.

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