hash Code
Returns the hash code value for this object.
The hash code is computed by combining the hash codes of various properties of this object. The properties used for computing the hash code are:
version: The hash code of the 'version' property
credentials: The hash code of the 'credentials' property
dids: The hash code of the 'dids' property
didPairs: The hash code of the 'didPairs' property
keys: The hash code of the 'keys' property
messages: The hash code of the 'messages' property
linkSecret: The hash code of the 'linkSecret' property, if not null. Otherwise, 0 is used.
mediators: The hash code of the 'mediators' property
Return
the hash code value for this object