Activation Service PoC

[poszu]

Description

Activation Service is supposed to work (build ATXs) without direct access to:

• the state DB (which contains information required for building an ATX like positioning ATX),
• the gossip network (e.g. for publishing)

The Activation Service is supposed to:

• query the Node Service (a full go-spacemesh node) that has access to the state-db for the necessary information,
• publish the ATX via the Node Service

The Node Service is supposed to expose an HTTP API that will fulfill the needs of the Activation Service and act on its behalf for gossiping on the p2p network.

Steps

1. abstract away DB accesses from ATX Builder in form of an AtxService interface
2. define the Node-Service API and implement the server and client logic. The client should implement the activation.AtxService and pubsub.Publisher interfaces to be used by the ATX Builder
3. figure out a way to pass the PoET proofs to the NodeService
4. figure out a way for PoET certification (it requires access to the PoST proof created by the ID)
5. prepare a PoC consisting of the Activation-Service and Node-Service processes running together, where the Activation-Service builds and publishes ATXs with the help of the NodeService.

[poszu]

The activation-service part of the node-split PoC was implemented in #6356 and #6355