The node-engine's declared state acts: created by the grants part as a placed module's, its manifest placed on every node, and written by each node's engine under its own keys alone (issue 774, ADR 0563 §2, §3)

go/buscompose/engine.go

@@ -11,6 +11,17 @@ import (
 // EngineSeat is the seat.
 const EngineSeat = catalogue.EngineSeat
 
+// EngineModule is the node-engine's manifest's module name, and EngineActsState its state the acts asked through the
+// node seat and its own asks are kept in (ADR 0563 §2, §3: "the engine's own state"): the bucket mesh-host_acts, keys
+// `<node>.act.<id>`, `<node>.open.<act>.<digest>` and `<node>.ask.<id>`, each written by that node's engine alone.
+const (
+	EngineModule    = "mesh-host"
+	EngineActsState = "acts"
+)
+
+// EngineActsBucket is that state's bucket.
+var EngineActsBucket = BucketName(EngineModule, EngineActsState)
+
 // engineGrants is what a node's engine is granted to hold its node seat and to ask the operator (ADR 0563 §1, §3): it
 // answers its own node's verbs (the caller-named subjects are added beside them with every principal's), says the
 // seat's events about its node, answers discovery for the seat, asks who answers what (the login shell's execute, ADR
@@ -26,5 +37,9 @@ func engineGrants(p Principal) (pub, sub []string) {
 	sub = append(sub, announcing(EngineSeat)...)
 	pub = append(pub, discovering()...)
 	tp, ts := seatTrafficGrants(SeatTrafficOf(asks.EngineAsker(p.Node), nil, p.Uses, nil))
+	// And its acts and asks, under its own node's keys alone; never the bucket's creation, which is the grants part's.
+	if own, err := NodeKeysGrants(EngineActsBucket, p.Node); err == nil {
+		pub = append(pub, own...)
+	}
 	return append(pub, tp...), append(sub, ts...)
 }