You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: decrypt.go
    path of file: ./repos/graphjin/serv/internal/secrets
    
    the code of the file until where you have to start completion: package secrets

import (
	"errors"
	"fmt"
	"os"
	"path/filepath"

	"github.com/spf13/afero"
	"go.mozilla.org/sops/v3"
	"go.mozilla.org/sops/v3/cmd/sops/common"
	"go.mozilla.org/sops/v3/keyservice"
)

type decryptOpts struct {
	Cipher      sops.Cipher
	InputStore  sops.Store
	OutputStore sops.Store
	InputPath   string
	IgnoreMAC   bool
	Extract     []interface{}
	KeyS
    
func extract(tree *sops.Tree, path []interface{}, outputStore sops.Store) ([]byte, error) {
	var err error

	v, err := tree.Branches[0].Truncate(path)
	if err != nil {
		return nil, fmt.Errorf("error truncating tree: %s", err)
	}

	if newBranch, ok := v.(sops.TreeBranch); ok {
		tree.Branches[0] = newBranch
		decrypted, err := outputStore.EmitPlainFile(tree.Branches)
		if err != nil {
			return nil, err
		}
		return decrypted, err

	} else if str, ok := v.(string); ok {
		return []byte(str), nil
	}

	bytes, err := outputStore.EmitValue(v)
	if err != nil {
		return nil, err
	}

	return bytes, nil
}