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

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package container
import (
"crypto/sha256"
"fmt"
"strings"
containerContract "github.com/nspcc-dev/neofs-contract/container"
core "github.com/nspcc-dev/neofs-node/pkg/core/container"
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"github.com/nspcc-dev/neofs-node/pkg/morph/client"
apistatus "github.com/nspcc-dev/neofs-sdk-go/client/status"
"github.com/nspcc-dev/neofs-sdk-go/container"
cid "github.com/nspcc-dev/neofs-sdk-go/container/id"
"github.com/nspcc-dev/neofs-sdk-go/session"
"github.com/nspcc-dev/neofs-sdk-go/signature"
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)
type containerSource Client
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func (x *containerSource) Get(cid *cid.ID) (*container.Container, error) {
return Get((*Client)(x), cid)
}
// AsContainerSource provides container Source interface
// from Wrapper instance.
func AsContainerSource(w *Client) core.Source {
return (*containerSource)(w)
}
// Get marshals container ID, and passes it to Wrapper's Get method.
//
// Returns error if cid is nil.
func Get(c *Client, cnr *cid.ID) (*container.Container, error) {
binCnr := make([]byte, sha256.Size)
cnr.Encode(binCnr)
return c.Get(binCnr)
}
// Get reads the container from NeoFS system by binary identifier
// through Container contract call.
//
// If an empty slice is returned for the requested identifier,
// storage.ErrNotFound error is returned.
func (c *Client) Get(cid []byte) (*container.Container, error) {
prm := client.TestInvokePrm{}
prm.SetMethod(getMethod)
prm.SetArgs(cid)
res, err := c.client.TestInvoke(prm)
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if err != nil {
if strings.Contains(err.Error(), containerContract.NotFoundError) {
var errNotFound apistatus.ContainerNotFound
return nil, errNotFound
}
return nil, fmt.Errorf("could not perform test invocation (%s): %w", getMethod, err)
} else if ln := len(res); ln != 1 {
return nil, fmt.Errorf("unexpected stack item count (%s): %d", getMethod, ln)
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}
arr, err := client.ArrayFromStackItem(res[0])
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if err != nil {
return nil, fmt.Errorf("could not get item array of container (%s): %w", getMethod, err)
}
if len(arr) != 4 {
return nil, fmt.Errorf("unexpected container stack item count (%s): %d", getMethod, len(arr))
}
cnrBytes, err := client.BytesFromStackItem(arr[0])
if err != nil {
return nil, fmt.Errorf("could not get byte array of container (%s): %w", getMethod, err)
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}
sigBytes, err := client.BytesFromStackItem(arr[1])
if err != nil {
return nil, fmt.Errorf("could not get byte array of container signature (%s): %w", getMethod, err)
}
pub, err := client.BytesFromStackItem(arr[2])
if err != nil {
return nil, fmt.Errorf("could not get byte array of public key (%s): %w", getMethod, err)
}
tokBytes, err := client.BytesFromStackItem(arr[3])
if err != nil {
return nil, fmt.Errorf("could not get byte array of session token (%s): %w", getMethod, err)
}
cnr := container.New()
if err := cnr.Unmarshal(cnrBytes); err != nil {
// use other major version if there any
return nil, fmt.Errorf("can't unmarshal container: %w", err)
}
if len(tokBytes) > 0 {
tok := session.NewToken()
err = tok.Unmarshal(tokBytes)
if err != nil {
return nil, fmt.Errorf("could not unmarshal session token: %w", err)
}
cnr.SetSessionToken(tok)
}
sig := signature.New()
sig.SetKey(pub)
sig.SetSign(sigBytes)
cnr.SetSignature(sig)
return cnr, nil
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}