frostfs-node/pkg/morph/client/netmap/epoch.go
Evgenii Stratonikov 71b87155ef [] *: use stdlib errors package
Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>
2021-05-19 16:42:54 +03:00

49 lines
1 KiB
Go

package netmap
import (
"fmt"
"github.com/nspcc-dev/neofs-node/pkg/morph/client"
)
// EpochArgs groups the arguments
// of get epoch number test invoke call.
type EpochArgs struct {
}
// EpochValues groups the stack parameters
// returned by get epoch number test invoke.
type EpochValues struct {
num int64
}
// Number return the number of NeoFS epoch.
func (e EpochValues) Number() int64 {
return e.num
}
// Epoch performs the test invoke of get epoch number
// method of NeoFS Netmap contract.
func (c *Client) Epoch(_ EpochArgs) (*EpochValues, error) {
items, err := c.client.TestInvoke(
c.epochMethod,
)
if err != nil {
return nil, fmt.Errorf("could not perform test invocation (%s): %w",
c.epochMethod, err)
}
if ln := len(items); ln != 1 {
return nil, fmt.Errorf("unexpected stack item count (%s): %d",
c.epochMethod, ln)
}
num, err := client.IntFromStackItem(items[0])
if err != nil {
return nil, fmt.Errorf("could not get number from stack item (%s): %w", c.epochMethod, err)
}
return &EpochValues{
num: num,
}, nil
}