Make the round participants sign the vtxo tree (#271)

* [proto] add APIs to send and receive musig2 signing data

* [common] add serialization functions for nonces and signatures

* [application] implements tree signing

* fix: remove old debug logs

* [proto] cleaning

* [common] fix musig2.go

* [application] fixes and logs

* [interface] fix: stop forwarding 2 times the events

* [client] add musig2 support + sign the tree when joining a round

* [interface] add new APIs into permissions.go

* [application][proto] rework PingResponse (return all events type)

* [common] split SetKeys into 2 distinct methods

* [client] fixes according to musig2.go changes

* [sdk] support tree signing + new PingResponse

* [sdk] fixes

* [application] revert event channel type

* [application] use domain.RoundEvent as lastEvent type

* [application] remove IsCovenantLess

* comments

* [application] revert roundAborted changes

* [interface] remove bitcointree dependencie

server/internal/interface/grpc/permissions/permissions.go

@@ -161,6 +161,14 @@ func Whitelist() map[string][]bakery.Op {
 			Entity: EntityHealth,
 			Action: "read",
 		}},
+		fmt.Sprintf("/%s/SendTreeNonces", arkv1.ArkService_ServiceDesc.ServiceName): {{
+			Entity: EntityArk,
+			Action: "write",
+		}},
+		fmt.Sprintf("/%s/SendTreeSignatures", arkv1.ArkService_ServiceDesc.ServiceName): {{
+			Entity: EntityArk,
+			Action: "write",
+		}},
 	}
 }