[#107] Add client method ListFullSubjects

Signed-off-by: d.zverev <d.zverev@yadro.com>

frostfsid/client/client.go

@@ -2,16 +2,22 @@ package client
 
 import (
 	"fmt"
+	"errors"
 
 	"git.frostfs.info/TrueCloudLab/frostfs-contract/commonclient"
 	"github.com/nspcc-dev/neo-go/pkg/core/state"
 	"github.com/nspcc-dev/neo-go/pkg/core/transaction"
 	"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
+	"github.com/nspcc-dev/neo-go/pkg/io"
 	"github.com/nspcc-dev/neo-go/pkg/rpcclient/actor"
 	"github.com/nspcc-dev/neo-go/pkg/rpcclient/notary"
 	"github.com/nspcc-dev/neo-go/pkg/rpcclient/unwrap"
 	"github.com/nspcc-dev/neo-go/pkg/rpcclient/waiter"
+	"github.com/nspcc-dev/neo-go/pkg/smartcontract/callflag"
 	"github.com/nspcc-dev/neo-go/pkg/util"
+	"github.com/nspcc-dev/neo-go/pkg/vm/emit"
+	"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
+	"github.com/nspcc-dev/neo-go/pkg/vm/vmstate"
 	"github.com/nspcc-dev/neo-go/pkg/wallet"
 )
 
@@ -260,6 +266,39 @@ func (c Client) ListSubjects() ([]util.Uint160, error) {
 	return UnwrapArrayOfUint160(commonclient.ReadIteratorItems(c.act, iteratorBatchSize, c.contract, listSubjectsMethod))
 }
 
+// ListFullSubjects gets list of subjects.
+func (c Client) ListFullSubjects(hashes []util.Uint160) ([]*Subject, error) {
+	w := io.NewBufBinWriter()
+
+	for _, hash := range hashes {
+		emit.AppCall(w.BinWriter, c.contract, getSubjectMethod, callflag.All, hash)
+	}
+
+	invoker, err := c.act.Run(w.Bytes())
+	if err != nil {
+		return nil, err
+	}
+	if invoker.State != vmstate.Halt.String() {
+		return nil, fmt.Errorf("invocation failed: %s", invoker.FaultException)
+	}
+	subjects := make([]*Subject, 0, len(invoker.Stack))
+
+	for _, item := range invoker.Stack {
+		arr, ok := item.Value().([]stackitem.Item)
+		if !ok {
+			return nil, errors.New("invalid subject")
+		}
+
+		subject, err := ParseSubject(arr)
+		if err != nil {
+			return nil, err
+		}
+		subjects = append(subjects, subject)
+	}
+
+	return subjects, nil
+}
+
 // AddSubjectKey adds extra public key to subject.
 // Must be invoked by contract owner.
 func (c Client) AddSubjectKey(addr util.Uint160, key *keys.PublicKey) (tx util.Uint256, vub uint32, err error) {