Smart Contract Application development content
Check basic flow
The basic processing flow of using this service is as follows.
Sending end-user's own signed request 
API server gets contract address using provider's CNS [1.1]
API server calls Contract provided by service provider [1.2]
What the service provider develops
For the above-mentioned blue letters, since this service is provided, the parts that need development as a smart contract application are as follows.
End user screen and call logic
Contract on Ethereum