Elli Androulaki, Marcus Brandenburger, May Buzaglo Rosenbaum, Angelo De · 12 authors
The adoption of Distributed Ledger Technology (DLT) for critical financial infrastructures like Central Bank Digital Currencies (CBDCs) is hindered by a significant performance gap. Permissioned blockchains such as Hyperledger Fabric, which are conceptually suitable and have become popular platform used in many production deployments today, are nevertheless limited by architectural bottlenecks. Their monolithic peer design and consensus mechanisms prevent them from achieving the required scale for such demanding applications.
Divya Pulivarthi, S. R. Eshwar, Gugan Thoppe, Kshitij Pratihast · 8 authors
Hyperledger Fabric (HLF) is an open-source distributed ledger for businesses to establish private blockchains with granular control over data access and privacy. It typically has multiple endorsing, committing, and ordering peers that collectively contribute to the network’s functionality and security. For optimal performance, balancing the endorsement load among peers is essential. In practice, though, a subset of leaders often become solely responsible for endorsements, making the HLF performance sub-optimal. In this early work, we show that pausing commits at the current leading peers—to enable other peers to catch up and become leaders themselves—can lead to non-trivial throughput improvements. Even with a basic strategy, we see 1.27× more commits in synthetic experiments. This paves the way for sophisticated optimal commit strategies in future.
The feature of Blockchain as distributed ledger that are shared among nodes within a computer network, renowned for its pivotal role in cryptocurrency systems by ensuring a secure and decentralized the role of transaction record which is ensured for maintenance of security and decentralization in cryptocurrency systems.The Linux Foundation host the open-source framework of private blockchain, the Hyperledger Fabric (HLF).Smart contracts are utilized for transaction management and a modular architecture of blockchain framework, providing a foundation for the development of blockchain-based applications through plug-and-play components.In the realm of distributed systems, scalability emerges as a crucial design goal for developers.The most appropriate blockchain platform for the operations of the business industry, which need for the seamless addition of more users and resources without perceptible performance loss.An assessment of scalability is required as a large number of nodes involvement in the implementation of blockchain frameworks.In this paper, the impact of system configurations such as, transaction volume, node types is focused in the transition of V2.2.4 with the various significant issues with the architecture.The throughput, latency, processor, and memory usages are mainly analyzed based on the different number of transactions.According to the performance results of the proposed system, the scalability of the possible number of transactions and the different peer nodes can be supported in the implementation of blockchain-based system for HLF blockchain.
Hyperledger Fabric is a permissioned blockchainbased distributed ledger framework that enables organizations to collaborate securely in a network only shared between them. Its architecture facilitates ledger data partitioning via so-called channels, ensuring that only the proper subsets of the organizations in the network consortium replicate specific data segments. However, the requirement-based design of the partitioning of a consortium-wide logical data model into channel-based data management has not been investigated yet. In this paper, we explore the application of Formal Concept Analysis (FCA) to compute the channel structures that emerge from organizational data manageability requirements. We establish the “need-to-know” data sub-models as formal concepts over organizations and use their lattice to determine data to channel partitionings.
With the social and environmental footprint of textiles and apparel coming under growing scrutiny, downstream users and investors alike are calling for greater accountability of and assurance regarding the impact of textile production and consumption. At the same time, new technological advancements such as distributed ledgers (blockchain), internet of things (IoT), physical tracer technologies (such as DNA marking), artificial intelligence and machine learning are enabling data systems to enhance their production efficiency and provide transparency in critical operations. They are also helping collect, store and communicate valuable information. Its high consumption and disposal rates means the textile and apparel industry provide an ideal case study for these developments – especially in the context of increased commitment to responsible material sourcing and emission reductions. This chapter focuses on the data aspects in textile circulation and highlights some of the challenges and opportunities that the use of data may create in the textile value chain.
<p>In order to use the fabric blockchain to store ERC 20 tokens, each one must be issued by the owner of the asset. In the case of Fabric, the owner issues the tokens in an "unspent" state on the ledger. The owner can then open a channel on the blockchain to allow others to receive the tokens. Once the token is transferred to a recipient, it is considered "spent" and removed from the channel. When the user redeems the token, it is stored on the Hyperledger Fabric blockchain ledger. This ensures that the token will not be transferred to another owner after the end of the term.</p>\n\n<p>The infrastructure component of Hyperledger Fabric is built on the Ethereum blockchain. It has the same benefits as Ethereum, but it is not as widely adopted as Ethereum. The ERC20 standard has been around for a while, so it can be used to store ERC 20 tokens. The fabric is modular and supports customization to suit different requirements. The use of Hyperledger Fabric 2.0 as a token platform means that the asset can be stored on the blockchain and used by the users.</p>\n\n<p>Unlike Ethereum, Hyperledger is a permissioned network where participants are known and have known identities. Companies with strict data protection laws and regulations will likely be comfortable with this kind of system. However, the network doesn't offer its own token system, so if a company wants to transfer funds between accounts, it should use Ethereum. This is also the case for companies that want to implement a decentralized payment system, such as an ICO.</p>\n\n<p>Aside from its scalability and security, Hyperledger Fabric has many advantages. In the case of ERC 20 tokens, Fabric allows the developers to code "chaincodes", which are smart contracts in Hyperledger parlance. These "chaincodes" are a type of cryptographic data hash. The Fabric consensus algorithm mirrors the workflow of organizations. It also offers secure access to data and can be used to create and execute smart contracts.</p>\n\n<p>As a result of this robust security, EVM chaincode can interact with Ethereum smart contracts and Fabric. By downloading the GitHub repository, developers can customize the chaincode to map to a folder of their choice. The instructions are very detailed. Once you have the appropriate software installed, you can build the multi-container apps and test them. Additionally, you can use "Go" language for Ethereum smart contracts on Fabric.</p>\n\n<p>Tokens on Ethereum are stored on the Ethereum network, which requires a transaction fee of $400. This fee varies depending on the size of the smart contract. However, this fee can be waived when generating tokens for customers. It's also possible to purchase a service that generates tokens for customers. You'll want to take the time to learn all you can about <a href="https://cryptominnie.com/">Crypto Minnie</a> before deciding. For $20, you can get the service of CoinManufactory and create your own custom ERC 20 tokens.</p>\n\n<p>Tokenization is a significant part of blockchain networks, and it is the process of converting physical assets into digital ones. Once digital, tokens are easily exchanged, purchased, or redeemed for other digital assets. Moreover, they can be categorized as either fungible or non-fungible assets. The latter has a broader utility than the former. You can make a list of different ERC 20 tokens in a Hyperledger Fabric instance and check out the corresponding information for Hyperledger Fabric.</p>\n\n<p> Overledger is a protocol that facilitates secure access to all DLTs. It configures each DLT to accept payments and send cryptocurrency to recipients. Then it provides a secure interface for the recipients to send and receive cryptocurrency. This is a highly effective way to manage distributed assets and tokens. Ultimately, it allows an organization to secure a blockchain while enabling a wide range of applications.</p>
Luís Alves, Estrela Ferreira Cruz, Sérgio Ivan Lopes, Pedro Miguel Faria · 5 authors
The textile and clothing industry sector has today a big environmental impact, not only due to the consumption of water and the use of toxic chemicals but also due to the increasing levels of textile waste. One way to reduce the problem is to circularise the, currently linear, textile and clothing value chain, by using discarded clothes as raw material for the production of new clothes, transforming it into a model of circular economy. This way, while reducing the need to produce new raw materials (e.g. cotton), the problem of textile waste produced is also reduced, thus contributing to a more sustainable industry. In this article, we review the current approaches for traceability in the textile and clothing value chain, and study a set of technologies we deem essential for promoting the circular economy in this value chain - namely, the blockchain technology - for registering activities on traceable items through the value chain, and the Internet of Things (IoT) technology, for easily identifying the traceable items' digital twins.
Tobias Guggenberger, Johannes Sedlmeir, Gilbert Fridgen, André Luckow
Private permissioned blockchains are deployed in ever greater numbers to facilitate cross-organizational processes in various industries, particularly in supply chain management. One popular example of this trend is Hyperledger Fabric. Compared to public permissionless blockchains, it promises improved performance and provides certain features that address key requirements of enterprises. However, also permissioned blockchains are still not as scalable as centralized systems, and due to the scarcity of theoretical results and empirical data, their real-world performance cannot be predicted with the necessary precision. We intend to address this issue by conducting an in-depth performance analysis of Hyperledger Fabric. The paper presents a detailed compilation of various performance characteristics using an enhanced version of the Distributed Ledger Performance Scan (DLPS). Researchers and practitioners alike can use the various performance properties identified and discussed as guidelines to better configure and implement their Hyperledger Fabric network. Likewise, they are encouraged to use the DLPS framework to conduct their measurements.
Käesolevas bakalaureusetöös tutvustatakse plokiahela tehnoloogiat ning selle kahte erinevat platvormi, Ethereum ja Hyperledger Fabric, mis on loodud väga erinevate rakenduste loomiseks kasutades just plokiahela tehnoloogiat. Peale selle luuakse mõlemat platvormi kasutades sarnane rakendus, millele järgneb võrdlus. Esiteks, annab võrdlus lugejale ülevaate, kuidas antud platvormid üksteisest arhitektuuri ning kasutajamugavuse poolest erinevad. Teiseks näitab, kuidas erineb nende platvormide abil rakenduste loomine ning mille poolest erinevad lõputöö raames loodud rakendused.