The security and disclosure of information in online transaction data remains a sensitive subject until this day. Whenever a collection of data from a transaction process is accessible over the internet system, certain parties may misuse any one of these data. Blockchain technology, which includes the use of smart contracts, is thought to be capable of overcoming this problem due to the blockchain's decentralized and distributed nature. Blockchain allows transaction data to be accessed openly and transparently while still being securely protected by hashing encryption owned by smart contracts. This enables users to have detailed access privileges to each transaction's data. The development of smart contracts will be carried out in the production of microservices payment gateways based on decentralized apps (DApps) on the Ethereum blockchain in this research, with the payment gateway generated being used in the tuition payment process. The Truffle framework and the Metamask wallet will be used to assist the Ethereum payment process during the DApps development process. The results of testing the functionality of each smart contract feature reveal that the payment system can be utilized effectively and that there are no issues that cause transaction failures.
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