service: define and implement Token field composing interface

This commit:

  * defines SessionToken interface of Token field getters/setters group;

  * implements SessionToken on Token message.

service/token.go

@@ -0,0 +1,125 @@
+package service
+
+import (
+	"github.com/nspcc-dev/neofs-api-go/refs"
+)
+
+// VerbContainer is an interface of the container of a token verb value.
+type VerbContainer interface {
+	GetVerb() Token_Info_Verb
+	SetVerb(Token_Info_Verb)
+}
+
+// TokenIDContainer is an interface of the container of a token ID value.
+type TokenIDContainer interface {
+	GetID() TokenID
+	SetID(TokenID)
+}
+
+// CreationEpochContainer is an interface of the container of a creation epoch number.
+type CreationEpochContainer interface {
+	CreationEpoch() uint64
+	SetCreationEpoch(uint64)
+}
+
+// ExpirationEpochContainer is an interface of the container of an expiration epoch number.
+type ExpirationEpochContainer interface {
+	ExpirationEpoch() uint64
+	SetExpirationEpoch(uint64)
+}
+
+// SessionKeyContainer is an interface of the container of session key bytes.
+type SessionKeyContainer interface {
+	GetSessionKey() []byte
+	SetSessionKey([]byte)
+}
+
+// SignatureContainer is an interface of the container of signature bytes.
+type SignatureContainer interface {
+	GetSignature() []byte
+	SetSignature([]byte)
+}
+
+// SessionTokenInfo is an interface that determines the information scope of session token.
+type SessionTokenInfo interface {
+	TokenIDContainer
+	refs.OwnerIDContainer
+	VerbContainer
+	refs.AddressContainer
+	CreationEpochContainer
+	ExpirationEpochContainer
+	SessionKeyContainer
+}
+
+// SessionToken is an interface of token information and signature pair.
+type SessionToken interface {
+	SessionTokenInfo
+	SignatureContainer
+}
+
+var _ SessionToken = (*Token)(nil)
+
+// GetID is an ID field getter.
+func (m Token_Info) GetID() TokenID {
+	return m.ID
+}
+
+// SetID is an ID field setter.
+func (m *Token_Info) SetID(id TokenID) {
+	m.ID = id
+}
+
+// GetOwnerID is an OwnerID field getter.
+func (m Token_Info) GetOwnerID() OwnerID {
+	return m.OwnerID
+}
+
+// SetOwnerID is an OwnerID field setter.
+func (m *Token_Info) SetOwnerID(id OwnerID) {
+	m.OwnerID = id
+}
+
+// SetVerb is a Verb field setter.
+func (m *Token_Info) SetVerb(verb Token_Info_Verb) {
+	m.Verb = verb
+}
+
+// GetAddress is an Address field getter.
+func (m Token_Info) GetAddress() Address {
+	return m.Address
+}
+
+// SetAddress is an Address field setter.
+func (m *Token_Info) SetAddress(addr Address) {
+	m.Address = addr
+}
+
+// CreationEpoch is a Created field getter.
+func (m Token_Info) CreationEpoch() uint64 {
+	return m.Created
+}
+
+// SetCreationEpoch is a Created field setter.
+func (m *Token_Info) SetCreationEpoch(e uint64) {
+	m.Created = e
+}
+
+// ExpirationEpoch is a ValidUntil field getter.
+func (m Token_Info) ExpirationEpoch() uint64 {
+	return m.ValidUntil
+}
+
+// SetExpirationEpoch is a ValidUntil field setter.
+func (m *Token_Info) SetExpirationEpoch(e uint64) {
+	m.ValidUntil = e
+}
+
+// SetSessionKey is a SessionKey field setter.
+func (m *Token_Info) SetSessionKey(key []byte) {
+	m.SessionKey = key
+}
+
+// SetSignature is a Signature field setter.
+func (m *Token) SetSignature(sig []byte) {
+	m.Signature = sig
+}