Corda service does not exist when running flow on local network created by driver (NodeDriver.kt)

问题

I am getting following exception when accessing a service in flow of a cordapp

java.lang.IllegalArgumentException: Corda service com.example.services.MyService does not exist

i am using cordaV2 and have tried to edit NodeDriver.kt with

driver(isDebug = true, extraCordappPackagesToScan = listOf("com.example.services"))

but it doesn't help.

How can i update cordApp code that it runs locally on network created from NodeDriver.kt and it doesn't throw this exception!

回答1:

I rechecked my code and realized i wasn't using ServiceHub parameter in my service class. After adding that it was fixed.

class MyService(val services: ServiceHub) : SingletonSerializeAsToken()

来源：https://stackoverflow.com/questions/49704930/corda-service-does-not-exist-when-running-flow-on-local-network-created-by-drive