frostfs-node/pkg/morph/client/container/containers_of.go

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package container
import (
"errors"
"fmt"
"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/morph/client"
cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/user"
"github.com/nspcc-dev/neo-go/pkg/rpcclient/unwrap"
"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
)
// ContainersOf returns a list of container identifiers belonging
// to the specified user of FrostFS system. If idUser is nil, returns the list of all containers.
//
// If remote RPC does not support neo-go session API, fallback to List() method.
func (c *Client) ContainersOf(idUser *user.ID) ([]cid.ID, error) {
var rawID []byte
if idUser != nil {
rawID = idUser.WalletBytes()
}
var cidList []cid.ID
cb := func(item stackitem.Item) error {
rawID, err := client.BytesFromStackItem(item)
if err != nil {
return fmt.Errorf("could not get byte array from stack item (%s): %w", containersOfMethod, err)
}
var id cid.ID
err = id.Decode(rawID)
if err != nil {
return fmt.Errorf("decode container ID: %w", err)
}
cidList = append(cidList, id)
return nil
}
// We would like to have batch size as big as possible,
// to reduce the number of round-trips and avoid creating sessions.
// The limit depends on 2 things:
// 1. VM limits: max 2048 items on stack.
// 2. JSON encoded size for the item with type = 128k.
// It turns out, that for container ID the second limit is hit first,
// 512 is big enough value and it is beautiful.
const batchSize = 512
cnrHash := c.client.ContractAddress()
err := c.client.Morph().TestInvokeIterator(cb, batchSize, cnrHash, containersOfMethod, rawID)
if err != nil {
if errors.Is(err, unwrap.ErrNoSessionID) {
return c.list(idUser)
}
return nil, err
}
return cidList, nil
}