Operators can run services provided by enterprises through a chain network composed of hyperledger, and enterprises can operate separate private chains. Hyperledger, a private blockchain platform, provides a suitable environment for enterprise business implementation, and presents a technology standard that can be introduced in general-purpose into various industries. The operator in the chain network composed of hyperledger supports fintech linkages between enterprises and open banking chains in the central financial sector. The operator provides fintech services (synthetic asset services) for linking traditional financial assets and DeFi assets, and also provides the use of functional tokens by matching chain code function names with NFT token smart contracts and unique numbers. Oracle Perceptron nodes can only be operated by financial institutions, chain foundations, app service providers, and content providers.