1.7 KiB
Writing a custom notary service (experimental)
Warning
Customising a notary service is still an experimental feature and not recommended for most use-cases. The APIs for writing a custom notary may change in the future.
The first step is to create a service class in your CorDapp that extends the NotaryService abstract class. This will ensure that it is recognised as a notary service. The custom notary service class should provide a constructor with two parameters of types ServiceHubInternal and PublicKey. Note that ServiceHubInternal does not provide any API stability guarantees.
../../samples/notary-demo/workflows/src/main/kotlin/net/corda/notarydemo/MyCustomNotaryService.kt
The next step is to write a notary service flow. You are free to copy and modify the existing built-in flows such as ValidatingNotaryFlow, NonValidatingNotaryFlow, or implement your own from scratch (following the NotaryFlow.Service template). Below is an example of a custom flow for a validating notary service:
../../samples/notary-demo/workflows/src/main/kotlin/net/corda/notarydemo/MyCustomNotaryService.kt
To enable the service, add the following to the node configuration:
- notary : {
validating : true # Set to false if your service is non-validating className : "net.corda.notarydemo.MyCustomValidatingNotaryService" # The fully qualified name of your service class
}