Begun redesign of binance futures websocket. Added test provider for testing purposes.

services/data_service/internal/provider/providers/binance/ws/binance_futures.go

@@ -0,0 +1,52 @@
+package ws
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/google/uuid"
+	"gitlab.michelsen.id/phillmichelsen/tessera/services/data_service/internal/domain"
+)
+
+type BinanceFutures struct {
+	cfg               config
+	shards            map[uuid.UUID]*shard
+	streamAssignments map[string]*shard
+}
+
+type config struct {
+	Endpoint           string
+	MaxStreamsPerShard uint8
+	BatchInterval      time.Duration
+}
+
+func NewBinanceFuturesWebsocket(cfg config) *BinanceFutures {
+	return &BinanceFutures{
+		cfg:    cfg,
+		shards: make(map[uuid.UUID]*shard),
+	}
+}
+
+func (b *BinanceFutures) Start() error {
+	return nil
+}
+
+func (b *BinanceFutures) Stop() {
+	return
+}
+
+func (b *BinanceFutures) Subscribe(subject string) <-chan error {
+	return nil
+}
+
+func (b *BinanceFutures) Unsubscribe(subject string) <-chan error {
+	return nil
+}
+
+func (b *BinanceFutures) Fetch(subject string) (domain.Message, error) {
+	return domain.Message{}, fmt.Errorf("fetch not supported by provider")
+}
+
+func (b *BinanceFutures) GetActiveStreams() []string                   { return nil }
+func (b *BinanceFutures) IsStreamActive(key string) bool               { return false }
+func (b *BinanceFutures) IsValidSubject(key string, isFetch bool) bool { return false }

services/data_service/internal/provider/providers/binance/ws/shard.go

@@ -0,0 +1,12 @@
+package ws
+
+import (
+	"github.com/coder/websocket"
+	"github.com/google/uuid"
+)
+
+type shard struct {
+	ID            uuid.UUID
+	conn          websocket.Conn
+	activeStreams []string
+}