Remove Aevo exchange (retired)

- Delete exchange/aevo.go (AevoWS, aevoTickerMsg, aevoTickerData, etc.)
- scanner.go: remove ExAevo constant, fee rates, scan pair entries, shortName mapping
- main.go: remove aevoSymbols collection loop and TrackedSymbol usage

exchange/aevo.go

@@ -1,129 +0,0 @@
-package exchange
-
-import (
-	"encoding/json"
-	"log"
-	"time"
-)
-
-// AevoWS connects to Aevo WebSocket for ticker data.
-type AevoWS struct {
-	Conn    *PriceConnector
-	Tracked []TrackedSymbol // coin + instrument name pairs
-}
-
-type TrackedSymbol struct {
-	Coin         string // "BTC"
-	InstrumentID string // "BTC-PERP"
-}
-
-type aevoTickerMsg struct {
-	Op   string          `json:"op"`
-	Data json.RawMessage `json:"data"`
-}
-
-type aevoTickerData struct {
-	Timestamp string           `json:"timestamp"`
-	Tickers   []aevoInstrument `json:"tickers"`
-}
-
-type aevoInstrument struct {
-	InstrumentName string  `json:"instrument_name"`
-	Mark           *aevoPriceObj `json:"mark,omitempty"`
-	LastPrice      string  `json:"last_price,omitempty"`
-}
-
-type aevoPriceObj struct {
-	Price string `json:"price"`
-}
-
-func NewAevoWS(tracked []TrackedSymbol) *AevoWS {
-	ae := &AevoWS{
-		Tracked: tracked,
-		Conn:    NewPriceConnector("wss://ws.aevo.xyz", "Aevo", 120*time.Second, 30*time.Second),
-	}
-	ae.Conn.PingInterval = 45 * time.Second
-	return ae
-}
-
-// Run connects to Aevo WS and streams ticker data.
-func (a *AevoWS) Run(updateFn func(coin string, price, bid, ask float64)) error {
-	a.Conn.OnConnect = func() {
-		log.Printf("[Aevo WS] Connected, subscribing to %d tickers", len(a.Tracked))
-
-		for _, t := range a.Tracked {
-			sub := map[string]interface{}{
-				"op":   "subscribe",
-				"data": []string{"ticker:" + t.Coin},
-			}
-			if err := a.Conn.SendJSON(sub); err != nil {
-				log.Printf("[Aevo WS] Subscribe %s error: %v", t.InstrumentID, err)
-			}
-		}
-	}
-
-	a.Conn.OnMessage = func(msg []byte) {
-		var raw map[string]json.RawMessage
-		if err := json.Unmarshal(msg, &raw); err != nil {
-			return
-		}
-
-		// Check for error
-		if errMsg, hasErr := raw["error"]; hasErr {
-			var errStr string
-			json.Unmarshal(errMsg, &errStr)
-			if errStr != "" {
-				// Log once, skip errors
-				return
-			}
-		}
-
-		// Parse ticker data
-		op, hasOp := raw["op"]
-		if !hasOp {
-			return
-		}
-		var opStr string
-		if err := json.Unmarshal(op, &opStr); err != nil || opStr != "ticker" {
-			return
-		}
-
-		dataRaw, hasData := raw["data"]
-		if !hasData {
-			return
-		}
-
-		var data aevoTickerData
-		if err := json.Unmarshal(dataRaw, &data); err != nil {
-			return
-		}
-
-		for _, ticker := range data.Tickers {
-			// Find the coin for this instrument
-			coin := ""
-			for _, t := range a.Tracked {
-				if t.InstrumentID == ticker.InstrumentName {
-					coin = t.Coin
-					break
-				}
-			}
-			if coin == "" {
-				continue
-			}
-
-			// Try mark price first, then last_price
-			var price float64
-			if ticker.Mark != nil && ticker.Mark.Price != "" {
-				price = parseFloat(ticker.Mark.Price)
-			} else if ticker.LastPrice != "" {
-				price = parseFloat(ticker.LastPrice)
-			}
-
-			if price > 0 {
-				updateFn(coin, price, 0, 0) // B#7: pass bid=ask=0 for 4-arg signature
-			}
-		}
-	}
-
-	return a.Conn.Run()
-}

main.go

@@ -71,16 +71,11 @@ func main() {
 
 	// Collect symbols
 	var bnSymbols, bgSymbols, hlSymbols, dydxSymbols []string
-	var aevoSymbols []exchange.TrackedSymbol
 	for _, c := range TrackedCoins {
 		bnSymbols = append(bnSymbols, c.BN)
 		bgSymbols = append(bgSymbols, c.BG)
 		hlSymbols = append(hlSymbols, c.HL)
 		dydxSymbols = append(dydxSymbols, c.HL)
-		aevoSymbols = append(aevoSymbols, exchange.TrackedSymbol{
-			Coin:         c.Name,
-			InstrumentID: c.Name + "-PERP",
-		})
 	}
 
 	// Start all exchange WS connections

scanner.go

@@ -14,7 +14,6 @@ const (
 	ExHyperLiquid = "HyperLiquid"
 	ExBitget      = "Bitget"
 	ExDydx        = "dYdX"
-	ExAevo        = "Aevo"
 )
 
 // Fee rates (%) — taker fees per exchange
@@ -23,7 +22,6 @@ var feeRates = map[string]float64{
 	ExHyperLiquid: 0.035,
 	ExBitget:      0.040, // standard taker
 	ExDydx:        0.050, // dYdX v4 standard taker
-	ExAevo:        0.050, // Aevo standard taker
 }
 
 // Maker fee rates (%) — for limit orders
@@ -32,7 +30,6 @@ var makerFees = map[string]float64{
 	ExHyperLiquid: 0.015,
 	ExBitget:      0.020, // standard maker
 	ExDydx:        0.020,
-	ExAevo:        0.020,
 }
 
 // TickerCoins defines all coins we monitor.
@@ -67,7 +64,6 @@ func ScanArbWithFees(store *PriceStore, fees map[string]float64) []*ArbOpportuni
 		hlP := exMap[ExHyperLiquid]
 		bgP := exMap[ExBitget]
 		dyP := exMap[ExDydx]
-		aeP := exMap[ExAevo]
 
 		var pairs []struct {
 			profit float64
@@ -102,13 +98,9 @@ func ScanArbWithFees(store *PriceStore, fees map[string]float64) []*ArbOpportuni
 		addPair(ExBinance, ExHyperLiquid, bnP, hlP)
 		addPair(ExBinance, ExBitget, bnP, bgP)
 		addPair(ExBinance, ExDydx, bnP, dyP)
-		addPair(ExBinance, ExAevo, bnP, aeP)
 		addPair(ExHyperLiquid, ExBitget, hlP, bgP)
 		addPair(ExHyperLiquid, ExDydx, hlP, dyP)
-		addPair(ExHyperLiquid, ExAevo, hlP, aeP)
 		addPair(ExBitget, ExDydx, bgP, dyP)
-		addPair(ExBitget, ExAevo, bgP, aeP)
-		addPair(ExDydx, ExAevo, dyP, aeP)
 
 		if len(pairs) == 0 {
 			continue
@@ -163,8 +155,6 @@ func shortName(exchange string) string {
 		return "BG"
 	case ExDydx:
 		return "dYdX"
-	case ExAevo:
-		return "Ae"
 	}
 	return "??"
 }