75 lines
2.2 KiB
Go
75 lines
2.2 KiB
Go
package datasync
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import (
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"crypto/ecdsa"
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"errors"
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"github.com/golang/protobuf/proto"
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datasyncnode "github.com/vacp2p/mvds/node"
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datasyncproto "github.com/vacp2p/mvds/protobuf"
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datasynctransport "github.com/vacp2p/mvds/transport"
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"go.uber.org/zap"
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datasyncpeer "github.com/status-im/status-go/protocol/datasync/peer"
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)
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type DataSync struct {
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*datasyncnode.Node
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// NodeTransport is the implementation of the datasync transport interface.
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*NodeTransport
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logger *zap.Logger
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sendingEnabled bool
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}
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func New(node *datasyncnode.Node, transport *NodeTransport, sendingEnabled bool, logger *zap.Logger) *DataSync {
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return &DataSync{Node: node, NodeTransport: transport, sendingEnabled: sendingEnabled, logger: logger}
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}
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// UnwrapPayloadsAndAcks tries to unwrap datasync message and return messages payloads
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// and acknowledgements for previously sent messages
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func (d *DataSync) UnwrapPayloadsAndAcks(sender *ecdsa.PublicKey, payload []byte) ([][]byte, [][]byte, error) {
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var payloads [][]byte
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var acks [][]byte
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logger := d.logger.With(zap.String("site", "Handle"))
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datasyncMessage, err := unwrap(payload)
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// If it failed to decode is not a protobuf message, if it successfully decoded but body is empty, is likedly a protobuf wrapped message
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if err != nil {
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logger.Debug("Unwrapping datasync message failed", zap.Error(err))
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return nil, nil, err
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} else if !datasyncMessage.IsValid() {
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return nil, nil, errors.New("handling non-datasync message")
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} else {
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logger.Debug("handling datasync message")
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// datasync message
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for _, message := range datasyncMessage.Messages {
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payloads = append(payloads, message.Body)
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}
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acks = append(acks, datasyncMessage.Acks...)
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if d.sendingEnabled {
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d.add(sender, datasyncMessage)
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}
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}
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return payloads, acks, nil
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}
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func (d *DataSync) Stop() {
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d.Node.Stop()
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}
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func (d *DataSync) add(publicKey *ecdsa.PublicKey, datasyncMessage datasyncproto.Payload) {
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packet := datasynctransport.Packet{
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Sender: datasyncpeer.PublicKeyToPeerID(*publicKey),
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Payload: datasyncMessage,
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}
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d.NodeTransport.AddPacket(packet)
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}
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func unwrap(payload []byte) (datasyncPayload datasyncproto.Payload, err error) {
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err = proto.Unmarshal(payload, &datasyncPayload)
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return
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}
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