Online rating system development using blockchain-based distributed ledger technology

In most websites, the online rating system provides ratings of products and services to users. Lack trust in data integrity its manipulation has hindered fulfilling user satisfaction. Since existing systems deal with a central server, all is stored on server. Therefore, can be removed, modified, manipulated by manager change favor service or product provider. this paper, an using distributed ledger technologies been presented as proposed solve weaknesses current systems. Distributed are completely decentralized there no centralization them any institution. have different variants. Among technologies, blockchain technology used because support for smart contracts. system, Ethereum platform chosen from platforms that public permission network. raters cannot rate unless they submit request authorized take part process. The important feature contracts, which write contract Solidity language. Also, Proof Authority consensus mechanisms, transactions approved surveyors. real each transaction sent network raters, some gas must paid transaction. However, since method expensive, TestNet system. Finally, was restaurants website features were tested.