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make top-bid websocket stream generic
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,98 @@ | ||
| package bidcollect | ||
|
|
||
| import ( | ||
| "time" | ||
|
|
||
| "github.com/ethereum/go-ethereum/common/hexutil" | ||
| "github.com/flashbots/relayscan/common" | ||
| "github.com/gorilla/websocket" | ||
| "github.com/sirupsen/logrus" | ||
| ) | ||
|
|
||
| type TopBidWebsocketStreamBidsMsg struct { | ||
| Bid common.TopBidWebsocketStreamBid | ||
| Relay string | ||
| ReceivedAt time.Time | ||
| } | ||
|
|
||
| type TopBidWebsocketStreamOpts struct { | ||
| Log *logrus.Entry | ||
| Relay common.RelayEntry | ||
| BidC chan TopBidWebsocketStreamBidsMsg | ||
| } | ||
|
|
||
| type TopBidWebsocketStreamConnection struct { | ||
| log *logrus.Entry | ||
| relay common.RelayEntry | ||
| bidC chan TopBidWebsocketStreamBidsMsg | ||
| backoffSec int | ||
| } | ||
|
|
||
| func NewTopBidWebsocketStreamConnection(opts TopBidWebsocketStreamOpts) *TopBidWebsocketStreamConnection { | ||
| return &TopBidWebsocketStreamConnection{ | ||
| log: opts.Log.WithField("uri", opts.Relay.String()), | ||
| relay: opts.Relay, | ||
| bidC: opts.BidC, | ||
| backoffSec: initialBackoffSec, | ||
| } | ||
| } | ||
|
|
||
| func (ustream *TopBidWebsocketStreamConnection) Start() { | ||
| ustream.connect() | ||
| } | ||
|
|
||
| func (ustream *TopBidWebsocketStreamConnection) reconnect() { | ||
| backoffDuration := time.Duration(ustream.backoffSec) * time.Second | ||
| ustream.log.Infof("[websocket-stream] reconnecting to websocket stream in %s sec ...", backoffDuration.String()) | ||
| time.Sleep(backoffDuration) | ||
|
|
||
| // increase backoff timeout for next try | ||
| ustream.backoffSec *= 2 | ||
| if ustream.backoffSec > maxBackoffSec { | ||
| ustream.backoffSec = maxBackoffSec | ||
| } | ||
|
|
||
| ustream.connect() | ||
| } | ||
|
|
||
| func (ustream *TopBidWebsocketStreamConnection) connect() { | ||
| ustream.log.Info("[websocket-stream] Starting bid stream...") | ||
|
|
||
| dialer := websocket.DefaultDialer | ||
| wsSubscriber, resp, err := dialer.Dial(ustream.relay.String(), nil) | ||
| if err != nil { | ||
| ustream.log.WithError(err).Error("[websocket-stream] failed to connect to websocket stream, reconnecting in a bit...") | ||
| go ustream.reconnect() | ||
| return | ||
| } | ||
| defer wsSubscriber.Close() | ||
| defer resp.Body.Close() | ||
|
|
||
| ustream.log.Info("[websocket-stream] stream connection successful") | ||
| ustream.backoffSec = initialBackoffSec // reset backoff timeout | ||
|
|
||
| bid := new(common.TopBidWebsocketStreamBid) | ||
|
|
||
| for { | ||
| _, nextNotification, err := wsSubscriber.ReadMessage() | ||
| if err != nil { | ||
| // Handle websocket errors, by closing and reconnecting. Errors seen previously: | ||
| ustream.log.WithError(err).Error("websocket stream websocket error") | ||
| go ustream.reconnect() | ||
| return | ||
| } | ||
|
|
||
| // Unmarshal SSZ | ||
| err = bid.UnmarshalSSZ(nextNotification) | ||
| if err != nil { | ||
| ustream.log.WithError(err).WithField("msg", hexutil.Encode(nextNotification)).Error("[websocket-stream] failed to unmarshal websocket stream message") | ||
| continue | ||
| } | ||
|
|
||
| ustream.bidC <- TopBidWebsocketStreamBidsMsg{ | ||
| Bid: *bid, | ||
| Relay: ustream.relay.Hostname(), | ||
| ReceivedAt: time.Now().UTC(), | ||
| } | ||
| } | ||
| } |
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