How can a node synchronize state root signatures over P2P?

[roman-khimov]

I don't see how a node can synchronize state root signatures over P2P in the current state validation implementation. Node can calculate local state root, node can catch broadcasted stateroot messages and add signatures this way, but if it misses them (or it's synchronizing from the genesis) there is nothing like getroots/roots pair of Neo 2 protocol to get validated state roots. So node can't ensure that its state is correct and can't provide state root signatures for its RPC clients, signatures are kinda "locked" into nodes that received them during initial stateroot broadcast. Is this intentional? How can we synchronize state roots?

[roman-khimov]

Judging from neo-project/neo#2374 this use case is just not supported intentionally. Nodes shouldn't care about state.