[#834] adm: Refactor morph module

Signed-off-by: Anton Nikiforov <an.nikiforov@yadro.com>

cmd/frostfs-adm/internal/modules/morph/util.go

@@ -0,0 +1,86 @@
+package morph
+
+import (
+	"errors"
+	"fmt"
+	"os"
+	"path/filepath"
+
+	"git.frostfs.info/TrueCloudLab/frostfs-node/cmd/frostfs-adm/internal/modules/config"
+	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/innerring"
+	"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/rpcclient/actor"
+	"github.com/nspcc-dev/neo-go/pkg/wallet"
+	"github.com/spf13/viper"
+)
+
+func getAlphabetWallets(v *viper.Viper, walletDir string) ([]*wallet.Wallet, error) {
+	wallets, err := openAlphabetWallets(v, walletDir)
+	if err != nil {
+		return nil, err
+	}
+
+	if len(wallets) > maxAlphabetNodes {
+		return nil, ErrTooManyAlphabetNodes
+	}
+	return wallets, nil
+}
+
+func openAlphabetWallets(v *viper.Viper, walletDir string) ([]*wallet.Wallet, error) {
+	walletFiles, err := os.ReadDir(walletDir)
+	if err != nil {
+		return nil, fmt.Errorf("can't read alphabet wallets dir: %w", err)
+	}
+
+	var size int
+loop:
+	for i := 0; i < len(walletFiles); i++ {
+		name := innerring.GlagoliticLetter(i).String() + ".json"
+		for j := range walletFiles {
+			if walletFiles[j].Name() == name {
+				size++
+				continue loop
+			}
+		}
+		break
+	}
+	if size == 0 {
+		return nil, errors.New("alphabet wallets dir is empty (run `generate-alphabet` command first)")
+	}
+
+	wallets := make([]*wallet.Wallet, size)
+	for i := 0; i < size; i++ {
+		letter := innerring.GlagoliticLetter(i).String()
+		p := filepath.Join(walletDir, letter+".json")
+		w, err := wallet.NewWalletFromFile(p)
+		if err != nil {
+			return nil, fmt.Errorf("can't open wallet: %w", err)
+		}
+
+		password, err := config.GetPassword(v, letter)
+		if err != nil {
+			return nil, fmt.Errorf("can't fetch password: %w", err)
+		}
+
+		for i := range w.Accounts {
+			if err := w.Accounts[i].Decrypt(password, keys.NEP2ScryptParams()); err != nil {
+				return nil, fmt.Errorf("can't unlock wallet: %w", err)
+			}
+		}
+
+		wallets[i] = w
+	}
+
+	return wallets, nil
+}
+
+func newActor(c actor.RPCActor, committeeAcc *wallet.Account) (*actor.Actor, error) {
+	return actor.New(c, []actor.SignerAccount{{
+		Signer: transaction.Signer{
+			Account: committeeAcc.Contract.ScriptHash(),
+			Scopes:  transaction.Global,
+		},
+		Account: committeeAcc,
+	}})
+}