Signing service implementation

[HauklandJ]

SigningService - use case

Based on the implementation(s) of the interface for signee logic, calls ActionAccessDelegationService to grant access for the relevant parties.

public
List GetSignees (reads from storage)
SetSigneesResult SetSignees (store who signees are, give access and send notifications)

private
SetSigneeResult SetSignee ( give access and send notification to single signee)

• Do we keep state about which grant access and send notification requests that succeeded/failed, so that we don't do it again?
• Exponential back-off retries? Generalized solution for this?

Order:

1. Store signee in storage
2. Give access rights
3. Send notification