status-go/protocol/datasync/datasync.go

66 lines
2.0 KiB
Go

package datasync
import (
"crypto/ecdsa"
"errors"
"github.com/golang/protobuf/proto"
datasyncnode "github.com/status-im/mvds/node"
"github.com/status-im/mvds/protobuf"
datasyncproto "github.com/status-im/mvds/protobuf"
datasynctransport "github.com/status-im/mvds/transport"
"go.uber.org/zap"
datasyncpeer "github.com/status-im/status-go/protocol/datasync/peer"
)
type DataSync struct {
*datasyncnode.Node
// NodeTransport is the implementation of the datasync transport interface.
*NodeTransport
logger *zap.Logger
sendingEnabled bool
}
func New(node *datasyncnode.Node, transport *NodeTransport, sendingEnabled bool, logger *zap.Logger) *DataSync {
return &DataSync{Node: node, NodeTransport: transport, sendingEnabled: sendingEnabled, logger: logger}
}
// Unwrap tries to unwrap datasync message and passes back the message to datasync in order to acknowledge any potential message and mark messages as acknowledged
func (d *DataSync) Unwrap(sender *ecdsa.PublicKey, payload []byte) (*protobuf.Payload, error) {
logger := d.logger.With(zap.String("site", "Handle"))
datasyncMessage, err := unwrap(payload)
// If it failed to decode is not a protobuf message, if it successfully decoded but body is empty, is likedly a protobuf wrapped message
if err != nil {
logger.Debug("Unwrapping datasync message failed", zap.Error(err))
return nil, err
} else if !datasyncMessage.IsValid() {
return nil, errors.New("handling non-datasync message")
} else {
logger.Debug("handling datasync message")
if d.sendingEnabled {
d.add(sender, &datasyncMessage)
}
}
return &datasyncMessage, nil
}
func (d *DataSync) Stop() {
d.Node.Stop()
}
func (d *DataSync) add(publicKey *ecdsa.PublicKey, datasyncMessage *datasyncproto.Payload) {
packet := datasynctransport.Packet{
Sender: datasyncpeer.PublicKeyToPeerID(*publicKey),
Payload: datasyncMessage,
}
d.NodeTransport.AddPacket(packet)
}
func unwrap(payload []byte) (datasyncPayload datasyncproto.Payload, err error) {
err = proto.Unmarshal(payload, &datasyncPayload)
return
}