Represents who give a trust
Chain of trusts started from self-signed root trust.
Wrapper to use PublicKey in HashMap
“A document” that cancels trust created before. TODO delete pk from Revoke (it is already in a trust node)
One element in chain of trust in a certificate. TODO delete pk from Trust (it is already in a trust node)
Graph to efficiently calculate weights of certificates and get chains of certificates. TODO serialization/deserialization TODO export a certificate from graph
for simplicity, we store
n where Weight = 1/n^2