Writing a custom notary service (experimental)¶
警告
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.
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
}