[#473] Implement EigenTrust calculations

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>

pkg/services/reputation/eigentrust/iteration.go

@@ -0,0 +1,31 @@
+package eigentrust
+
+import (
+	"github.com/nspcc-dev/neofs-node/pkg/services/reputation"
+)
+
+type EpochIteration struct {
+	e uint64
+	i uint32
+}
+
+func (x EpochIteration) Epoch() uint64 {
+	return x.e
+}
+
+func (x *EpochIteration) SetEpoch(e uint64) {
+	x.e = e
+}
+
+func (x EpochIteration) I() uint32 {
+	return x.i
+}
+
+func (x *EpochIteration) SetI(i uint32) {
+	x.i = i
+}
+
+type IterationTrust struct {
+	EpochIteration
+	reputation.Trust
+}