[#770] morph/event/container: Add notary Put parser

Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>

pkg/morph/event/container/put_notary.go

@@ -0,0 +1,73 @@
+package container
+
+import (
+	"fmt"
+
+	"github.com/nspcc-dev/neo-go/pkg/vm/opcode"
+	"github.com/nspcc-dev/neofs-node/pkg/morph/event"
+)
+
+func (p *Put) setRawContainer(v []byte) {
+	if v != nil {
+		p.rawContainer = v
+	}
+}
+
+func (p *Put) setSignature(v []byte) {
+	if v != nil {
+		p.signature = v
+	}
+}
+
+func (p *Put) setPublicKey(v []byte) {
+	if v != nil {
+		p.publicKey = v
+	}
+}
+
+func (p *Put) setToken(v []byte) {
+	if v != nil {
+		p.token = v
+	}
+}
+
+var fieldSetters = []func(*Put, []byte){
+	// order on stack is reversed
+	(*Put).setToken,
+	(*Put).setPublicKey,
+	(*Put).setSignature,
+	(*Put).setRawContainer,
+}
+
+const (
+	// PutNotaryEvent is method name for container put operations
+	// in `Container` contract. Is used as identificator for notary
+	// put container requests.
+	PutNotaryEvent = "put"
+)
+
+var errUnexpectedArgumentAmount = fmt.Errorf("unexpected arguments amount in %s call", PutNotaryEvent)
+
+// ParsePutNotary from NotaryEvent into container event structure.
+func ParsePutNotary(ne event.NotaryEvent) (event.Event, error) {
+	var ev Put
+
+	fieldNum := 0
+
+	for _, op := range ne.Params() {
+		switch op.Code() {
+		case opcode.PUSHDATA1, opcode.PUSHDATA2, opcode.PUSHDATA4:
+			if fieldNum > expectedItemNumPut {
+				return nil, errUnexpectedArgumentAmount
+			}
+
+			fieldSetters[fieldNum](&ev, op.Param())
+			fieldNum++
+		default:
+		}
+	}
+
+	ev.notaryRequest = ne.Raw()
+
+	return ev, nil
+}