Read a ledger: an instance's state, its history oldest first with sequence and author, a watch of its states, a declared index (issue 1966 T3)

node-tools/internal/ledger/ledger.go

@@ -87,6 +87,8 @@ type Ledger struct {
 	History   History
 	State     State
 	Snapshots Snapshots
+	// Indexes are its declared indexes' buckets, by index name.
+	Indexes map[string]Index
 	// Now is the clock an operation is stamped by; time.Now when nil.
 	Now func() time.Time
 	// Logf says what an apply could not do after its operation was taken; nothing is said when nil.