status-go/protocol/datasync/transport.go

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package datasync
import (
"context"
"crypto/ecdsa"
"errors"
"github.com/golang/protobuf/proto"
datasyncpeer "github.com/status-im/status-go/protocol/datasync/peer"
"github.com/vacp2p/mvds/protobuf"
"github.com/vacp2p/mvds/state"
"github.com/vacp2p/mvds/transport"
)
var errNotInitialized = errors.New("Datasync transport not initialized")
type DataSyncNodeTransport struct {
packets chan transport.Packet
dispatch func(context.Context, *ecdsa.PublicKey, []byte, *protobuf.Payload) error
}
func NewDataSyncNodeTransport() *DataSyncNodeTransport {
return &DataSyncNodeTransport{
packets: make(chan transport.Packet),
}
}
func (t *DataSyncNodeTransport) Init(dispatch func(context.Context, *ecdsa.PublicKey, []byte, *protobuf.Payload) error) {
t.dispatch = dispatch
}
func (t *DataSyncNodeTransport) AddPacket(p transport.Packet) {
t.packets <- p
}
func (t *DataSyncNodeTransport) Watch() transport.Packet {
return <-t.packets
}
func (t *DataSyncNodeTransport) Send(_ state.PeerID, peer state.PeerID, payload protobuf.Payload) error {
if t.dispatch == nil {
return errNotInitialized
}
data, err := proto.Marshal(&payload)
if err != nil {
return err
}
publicKey, err := datasyncpeer.PeerIDToPublicKey(peer)
if err != nil {
return err
}
return t.dispatch(context.TODO(), publicKey, data, &payload)
}
// CalculateSendTime calculates the next epoch
// at which a message should be sent.
func CalculateSendTime(count uint64, time int64) int64 {
return time + int64(count*2) // @todo this should match that time is increased by whisper periods, aka we only retransmit the first time when a message has expired.
}