frostfs-node/pkg/morph/client/netmap/wrapper/wrapper.go

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2020-07-24 13:54:03 +00:00
package wrapper
import (
"errors"
"fmt"
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"github.com/nspcc-dev/neo-go/pkg/encoding/fixedn"
"github.com/nspcc-dev/neo-go/pkg/util"
"github.com/nspcc-dev/neofs-node/pkg/morph/client"
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"github.com/nspcc-dev/neofs-node/pkg/morph/client/netmap"
)
// Client represents the Netmap contract client.
//
// It is a type alias of
// github.com/nspcc-dev/neofs-node/pkg/morph/client/netmap.Client.
type Client = netmap.Client
// Wrapper is a wrapper over netmap contract
// client which implements:
// * network map storage;
// * tool for peer state updating.
//
// Working wrapper must be created via constructor New.
// Using the Wrapper that has been created with new(Wrapper)
// expression (or just declaring a Wrapper variable) is unsafe
// and can lead to panic.
type Wrapper struct {
client *Client
}
// ErrNilWrapper is returned by functions that expect
// a non-nil Wrapper pointer, but received nil.
var ErrNilWrapper = errors.New("netmap contract client wrapper is nil")
// NewFromMorph returns the wrapper instance from the raw morph client.
func NewFromMorph(cli *client.Client, contract util.Uint160, fee fixedn.Fixed8) (*Wrapper, error) {
staticClient, err := client.NewStatic(cli, contract, fee)
if err != nil {
return nil, fmt.Errorf("can't create netmap static client: %w", err)
}
enhancedNetmapClient, err := netmap.New(staticClient)
if err != nil {
return nil, fmt.Errorf("can't create netmap morph client: %w", err)
}
return &Wrapper{client: enhancedNetmapClient}, nil
}