KonPay is a blockchain payment service project that provides incentives and rewards to all participants, and provides a convenient payment service platform for merchants and users through the app, thereby facilitating interaction between users and liquidity of digital assets. KonPay provides merchants with a service that allows for faster settlement than the settlement period of the existing payment structure. By providing a smart contract-based integrated management system, merchants conveniently provide an integrated management system that includes sales, profit, expected refund amount, credit, and transaction history.