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[#327] nns: Support Null returned value

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Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
This commit is contained in:
Pavel Karpy 2022-08-31 18:05:09 +03:00 committed by LeL
parent d808f72c38
commit 71891029da
2 changed files with 21 additions and 11 deletions
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12
ns/nns.go
View file

@ -2,6 +2,7 @@ package ns
import (
"context"
"errors"
"fmt"
"net/url"
@ -11,6 +12,7 @@ import (
"github.com/nspcc-dev/neo-go/pkg/rpcclient/invoker"
"github.com/nspcc-dev/neo-go/pkg/rpcclient/unwrap"
"github.com/nspcc-dev/neo-go/pkg/util"
"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
"github.com/nspcc-dev/neofs-contract/nns"
cid "github.com/nspcc-dev/neofs-sdk-go/container/id"
)
@ -82,13 +84,20 @@ func (n *NNS) Dial(address string) error {
//
// See also https://docs.neo.org/docs/en-us/reference/nns.html.
func (n *NNS) ResolveContainerName(name string) (cid.ID, error) {
arr, err := unwrap.Array(n.invoker.Call(n.nnsContract, "resolve",
item, err := unwrap.Item(n.invoker.Call(n.nnsContract, "resolve",
name+".container", int64(nns.TXT),
))
if err != nil {
return cid.ID{}, fmt.Errorf("contract invocation: %w", err)
}
if _, ok := item.(stackitem.Null); !ok {
arr, ok := item.Value().([]stackitem.Item)
if !ok {
// unexpected for types from stackitem package
return cid.ID{}, errors.New("invalid cast to stack item slice")
}
var id cid.ID
for i := range arr {
@ -102,6 +111,7 @@ func (n *NNS) ResolveContainerName(name string) (cid.ID, error) {
return id, nil
}
}
}
return cid.ID{}, errNotFound
}

2
ns/nns_test.go
View file

@ -112,7 +112,7 @@ func TestNNS_ResolveContainerName(t *testing.T) {
testC.res.Stack[0] = stackitem.Null{}
_, err := n.ResolveContainerName(testContainerName)
require.Error(t, err)
require.ErrorIs(t, err, errNotFound)
})
t.Run("array stack item with non-slice value", func(t *testing.T) {