Writing a custom notary service (experimental)

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.

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:

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
}